若松 純一 (ワカマツ ジユンイチ)
農学研究院 基盤研究部門 畜産科学分野 | 教授 |
Last Updated :2025/01/11
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■経歴
経歴
委員歴
- 2023年04月 - 現在
北海道環境生活部, エゾシカ肉品質管理のための検討懇話会, 自治体 - 2023年04月 - 現在
北海道畜産草地学会, 会計幹事, 学協会 - 2015年04月 - 現在
日本食肉科学会, 広報委員, 学協会 - 2015年04月 - 現在
日本食肉科学会, 常務理事, 学協会 - 2015年 - 現在
日本畜産学会, 機関紙編集委員, 学協会 - 2017年10月 - 2019年03月
北海道環境生活部, エゾシカわな捕獲技術等検討会委員, 自治体 - 2015年04月 - 2019年03月
日本食肉科学会, 評議員, 学協会 - 2014年04月 - 2015年03月
北海道畜産草地学会, 監事, 学協会 - 1998年04月 - 2015年03月
日本食肉研究会, 編集幹事, 学協会 - 2012年12月 - 2014年03月
北海道畜産草地学会, 会計幹事, 学協会 - 2010年04月 - 2012年12月
北海道畜産学会, 会計幹事, 学協会 - 2007年04月 - 2009年03月
日本食肉研究会, 庶務幹事, 学協会
■研究活動情報
論文
- Application of glucose to prepare Aspergillus oryzae koji as an adjunct to prevent rancidity in cheese products.
Napaporn Chintagavongse, Tomohiro Mitani, Koichi Tamano, Toru Hayakawa, Jun-Ichi Wakamatsu, Haruto Kumura
Bioscience, biotechnology, and biochemistry, 2024年11月28日, [国際誌]
英語, 研究論文(学術雑誌), Koji made using Aspergillus oryzae shows potential for application as a cheese adjunct; however, flavor defects resulting from volatile free fatty acid (FFA) accumulation should be avoided. Hence, a modified glucose-containing whey solid medium was used to culture A. oryzae AHU 7139, and the triacylglycerol (TG) lipase activity and lipase gene (tglA and mdlB) expression were compared with those of a culture using a conventional whey solid medium. The results showed that TG lipase activity and the expression of both lipase genes were reduced in the modified medium. Moreover, the expression level of farA, a positive transcription factor of the lipase genes, was also reduced. The cheese adjunct prepared by culturing the AHU 7139 strain in the modified medium lowered the FFA content in the cheese products, resulting in comparable FFA levels with those in the adjunct-free cheese. Thus, adding glucose is recommended to prepare the koji adjunct for cheesemaking. - Identification of cheese rancidity-related lipases in Aspergillus oryzae AHU 7139.
Napaporn Chintagavongse, Haruto Kumura, Toru Hayakawa, Jun-Ichi Wakamatsu, Koichi Tamano
Journal of bioscience and bioengineering, 2024年03月01日, [査読有り], [国内誌]
英語, 研究論文(学術雑誌), The adjunct product with enzymatic activity from Aspergillus oryzae is beneficial for flavor enrichment in the ripened cheese. However, an excessive lipolytic reaction leads to the release of volatile free fatty acids. Accordingly, a strong off-flavor (i.e., rancidity) has been detected when A. oryzae AHU 7139 is used. To identify the rancidity-related lipase from this strain, we evaluated the substrate specificity and lipase distribution using five mutants cultured on a whey-based solid medium under different initial pH conditions. The results showed a higher diacylglycerol lipase activity than triacylglycerol lipase activity. Moreover, an initial pH of 6.5 for the culture resulted in higher lipolytic activity than a pH of 4.0, and most of the activity was found in the extracellular fraction. Based on the gene expression analysis by real-time polymerase chain reaction and location and substrate specificity, five genes (No. 1, No. 19, mdlB, tglA, and cutL) were selected among 25 annotated lipase genes to identify the respective knockout strains. Because ΔtglA and ΔmdlB showed an outstanding involvement in the release of free fatty acids, these strains were applied to in vitro cheese curd experiments. In conclusion, we posit that triacylglycerol lipase (TglA) plays a key role as the trigger of rancidity and the resulting diglycerides have to be exposed to diacylglycerol lipase (MdlB) to stimulate rancidity in cheese made with A. oryzae AHU 7139. This finding could help screen suitable A.oryzae strains as cheese adjuncts to prevent the generation of the rancid-off flavor. - Zinc Protoporphyrin-Rich Pork Liver Homogenates as Coloring Ingredients in Nitrite-Free Liver Pâtés
Mar Llauger, Luis Guerrero, Jacint Arnau, Afra Morera, Jun-ichi Wakamatsu, Jose Manuel Lorenzo Rodriguez, RICARD BOU
Foods, 13, 4, 533, 2024年02月09日, [査読有り]
英語, 研究論文(学術雑誌) - Water extractability of the zinc protoporphyrin IX-myoglobin complex from Parma ham is pH-dependent.
Haruka Abe, Yang Zhai, Yu Toba, Hiroki Masumo, Toru Hayakawa, Haruto Kumura, Jun-Ichi Wakamatsu
Food chemistry, 441, 138317, 138317, 2024年01月02日, [査読有り], [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), The bright red color of Parma ham is mainly derived from zinc protoporphyrin IX (ZnPP), which exists in both water-soluble and insoluble states. Water-soluble ZnPP mainly binds to hemoglobin, however, the presence of water-insoluble ZnPP remains unexplained. Therefore, we aimed to elucidate how ZnPP exists in a water-insoluble state by focusing on its binding substance. Depending on the skeletal muscle, water-insoluble ZnPP comprised 30-50% of total ZnPP. The ZnPP water extractability was positively correlated with muscle pH. Water-insoluble ZnPP was extractable with a high-pH solution and existed as a complex with myoglobin or hemoglobin; nevertheless, myoglobin-binding ZnPP was more abundant. Furthermore, the water solubility of the myoglobin globin moiety at pH 5.5-6.0 was reduced by ZnPP binding. These results suggest that water-insoluble ZnPP mainly exists as a ZnPP-Mb complex, with low solubility attributed to the low pH of the ham. - Dissociation of ferriheme from oxidized heme proteins and re-reduction of ferriheme to ferroheme are crucial for the formation of zinc protoporphyrin IX in nitrite/nitrate-free dry-cured meat products.
Yang Zhai, Haruka Abe, Hung-Cheng Wang, Toru Hayakawa, Haruto Kumura, Jun-Ichi Wakamatsu
Food chemistry, 427, 136755, 136755, 2023年11月30日, [査読有り], [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Zinc protoporphyrin IX (ZnPP) is the dominant red pigment in nitrate/nitrite-free dry-cured meat products such as Parma ham, and it is considered to be a potential alternative to nitrite/nitrate for reddening dry-cured meat products. Ferroheme and ferriheme dissociated from heme proteins in meat were proposed as substrates to form ZnPP. To elucidate their specific formation mechanism, nitric oxide, carbon monoxide, and azide were used to stable heme in heme proteins. The exogenous hemoglobin derivatives bound with these ligands showed lower heme dissociation compared with exogenous oxyhemoglobin and did not contribute to ZnPP formation. Meanwhile, azide inhibited almost all ZnPP formation by binding to ferriheme, indicating ferriheme dissociation from oxidized heme proteins, predominantly for ZnPP formation. Free ferriheme could not be converted to ZnPP unless it was reduced to ferroheme. Overall, ferriheme dissociated from oxidized heme proteins was the dominant substrate for conversion to ZnPP after re-reduction to ferroheme. - 銃捕獲した野生エゾシカの肉質に及ぼす被弾部位と口径の影響
桒子和洋, 近藤誠司, 木富正裕, 亀井利活, 稲富佳洋, 河合正人, 日置昭二, 鳥羽悠, 早川徹, 玖村朗人, 若松純一
食肉の科学, 64, 1, 29, 38, 2023年06月, [査読有り], [最終著者, 責任著者]
日本語, 研究論文(学術雑誌) - Supplementary effect of whey components on the monascin productivity of Monascus sp.
Qingyun Huang, Nodoka Miyaki, Zongfei Li, Yutaroh Takahashi, Satoshi Ishizuka, Toru Hayakawa, Jun-Ichi Wakamatsu, Haruto Kumura
Journal of the science of food and agriculture, 103, 8, 4234, 4241, 2023年06月, [査読有り], [国際誌]
英語, 研究論文(学術雑誌), BACKGROUND: Monascus sp. has been used in fermented foods for centuries. It can synthesize yellow, red, and orange pigments as secondary metabolites. Here, we focused on yellow pigment monascin, responsible for anti-inflammation and antidiabetic effects, and investigated whether whey could be a suitable substrate with or without rice powder for monascin production using M. purpureus AHU 9085, M. pilosus NBRC 4520 and M. ruber NBRC 32318. RESULTS: The growth and monascin production of the three Monascus strains were dependent on three liquid media consisting of whey and/or rice. All strains showed the best growth in a rice and whey mixed medium, in which M. ruber NBRC 32318 exhibited the highest total monascin production. Subsequent investigation of the effects of whey components indicated that a mineral cocktail in whey was particularly effective in stimulating the monascin production efficiency of M. ruber NBRC 32318. However, this recipe exhibited less stimulation, or even inhibition, for M. pilosus NBRC 4520 and M. purpureus AHU 9085, respectively. In terms of total monascin production, rice with whey provided the highest amount due to growth promotion along with relatively high production efficiency. CONCLUSION: The effect of whey on growth and monascin production was strongly dependent on the Monascus strains. Even a mineral cocktail in whey could regulate monascin productivity in a strain-specific manner. Further studies are needed to elucidate the mechanism behind the diverse responses by the minerals in the production of monascin from Monascus. © 2023 Society of Chemical Industry. - L-histidine inhibits the heat-induced gelation of actomyosin in a low ionic strength solution.
Toru Hayakawa, Yu Kubono, Shuji Fujii, Jun-Ichi Wakamatsu, Haruto Kumura
Animal science journal = Nihon chikusan Gakkaiho, 94, 1, e13825, 2023年, [査読有り], [国際誌]
英語, 研究論文(学術雑誌), The heat-induced gelation of actomyosin plays a key role in meat processing. Our previous study showed that L-histidine could affect the characteristics of a heat-induced gel of myosin on a low ionic strength. To apply the specific effect of L-histidine to meat processing, the heat-induced gel properties of actomyosin in the presence of L-histidine were investigated. Actomyosin in a low ionic strength solution containing L-histidine did not form a gel upon heating. The dynamic rheological properties of actomyosin in low ionic strength solutions were distinct depending on the presence or absence of L-histidine. Electron microscopy showed that, heated at 50°C, actomyosin in a low ionic strength solution containing L-histidine remained a filamentous structure. The surface hydrophobicity of actomyosin was stable up to 50°C in a low ionic strength solution containing L-histidine. In conclusion, L-histidine might suppress the aggregation of actomyosin and inhibit heat-induced gelation in a low ionic strength solution. - Zinc protoporphyrin IX predominantly exists as a complex non-enzymatically bound to apo-hemoglobin in Parma ham.
Yang Zhai, Hung-Cheng Wang, Toru Hayakawa, Haruto Kumura, Jun-Ichi Wakamatsu
Food chemistry, 395, 133604, 133604, 2022年11月30日, [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Most of the water-soluble zinc protoporphyrin IX (ZnPP) in Parma ham mainly exists as complexes with hemoglobin and myoglobin (ZnPP-Hb and ZnPP-Mb). To elucidate the formation mechanism of these complexes, a new experimental model to produce higher amount of water-soluble ZnPP complexes was established. ZnPP-Hb was detected as the main water-soluble ZnPP complex in this model, which is the same as that in Parma ham. Adding exogenous Hb into this model promoted higher ZnPP formation than with Mb added, indicating that Hb was the superior substrate for generating ZnPP compared to Mb. The increase in non-heme iron content with ZnPP formation in both the Hb- and Mb-added groups indicated that the release of iron ion from heme was a crucial step in ZnPP formation. ZnPP-Hb was formed when ZnPP non-enzymatically bound with apo-Hb. These results revealed the mechanism of why ZnPP-Hb is more dominant in Parma ham than to ZnPP-Mb. - Evidence of the mechanism underlying zinc protoporphyrin IX formation in nitrite/nitrate-free dry-cured Parma ham.
Jun-Ichi Wakamatsu
Meat science, 192, 108905, 108905, 2022年10月, [査読有り], [招待有り], [筆頭著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), A large amount of zinc protoporphyrin IX (ZnPP) is found in nitrite/nitrate-free dry-cured meat products, such as Parma ham, and is known to contribute to the favorable bright red color of the latter. ZnPP is a metalloporphyrin, in which zinc is coordinated, instead of iron, in the porphyrin ring. ZnPP proved to be more stable than heme, and its formation should be favored in dried meat products to improve color without the addition of nitrites or nitrates. Toward that, understanding the mechanisms of formation of ZnPP in nitrite/nitrate-free dry-cured ham would be important. In this lecture, I introduce some of our research group's findings regarding the endogenous and exogenous factors contributing to the formation and distribution of ZnPP in Parma ham and why ZnPP formation is suppressed in common cured meat products. - A study of lipolysis induced by adjuncts from edible Aspergillus sp. solid culture products on ripened semi-hard cheese.
Napaporn Chintagavongse, Hayate Takiguchi, Chi Ming-Hsuan, Koichi Tamano, Toru Hayakawa, Jun-Ichi Wakamatsu, Tomohiro Mitani, Haruto Kumura
Journal of the science of food and agriculture, 2022年01月23日, [査読有り], [国際誌]
英語, 研究論文(学術雑誌), BACKGROUND: Aspergillus sp. has been used in traditional Japanese fermented foods. Protease-containing culture products of A. oryzae have been applied as the adjunct enzyme source to enrich the flavor in ripened cheese. Although proteolysis was stimulated, the increase of free fatty acids (FFA) was recognized in some products. Since an excess amount of FFA accumulation can cause rancidity in cheese products, the assessment of lipase activity was considered to be essential for the cheese adjunct preparation. RESULTS: Although an equal lipase activity from the adjunct materials of A. kawachii NBRC 4308, A. luchuensis RIB 2604 and A. oryzae AHU 7139 was applied to semi-hard cheese, the FFA level was significantly higher in A. oryzae cheese than in the others. Furthermore, the profiles of volatile components were different in experimental cheeses. An in vitro study with experimental curds demonstrated that the high FFA might not depend on the lipase retainability on curds. On the contrary, the pronounced activation of the lipases occurred in A. oryzae after incubation with the curds. Moreover, incubation of the insoluble lipase that had been attached to the cells with skim milk curd extracts allowed the release of lipases from the cells into the medium with remarkable activation. CONCLUSION: A. oryzae AHU 7139 possessed a complex lipolytic system comprising extracellular and cell-binding lipases that were attributed to the increase in FFA in A. oryzae cheese. © 2022 Society of Chemical Industry. - Water-extractable zinc protoporphyrin IX in Parma ham predominantly exists as complexes with hemoglobin and myoglobin
Hung-Cheng Wang, Toru Hayakawa, Haruto Kumura, Jun-ichi Wakamatsu
Food Bioscience, 40, 100870, 100870, Elsevier BV, 2021年04月, [査読有り], [最終著者, 責任著者]
英語, 研究論文(学術雑誌) - High ZnPP-forming food-grade lactic acid bacteria as a potential substitute for nitrite/nitrate to improve the color of meat products.
Md Kauser-Ul-Alam, Toru Hayakawa, Haruto Kumura, Jun-Ichi Wakamatsu
Meat science, 176, 108467, 108467, 2021年02月19日, [査読有り], [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Zinc protoporphyrin IX (ZnPP)-forming food-grade lactic acid bacteria (LAB) were screened from various sources for their ability to improve the color of meat products. The effects of salt and nitrite on the ZnPP-forming ability of these bacteria were also investigated. Finally, these bacteria were applied in salt-added minced meat to assess their ability to improve the color. Twenty-five LAB were screened for their ZnPP-forming ability in pork. Most of the strains exhibited maximum growth anaerobically in 3% salt at 30 °C and grew well at pH 5.5 and 6.5. Moreover, 3% salt slightly retarded ZnPP formation; however, nitrite completely inhibited ZnPP formation in all the ZnPP-forming LAB. Thirteen LAB (avoiding duplication and non-food-grade) could form ZnPP in salt-added minced meat, resulting in improvement of the bright red color, high ZnPP autofluorescence, and increased fluorescence intensity. Finally, considering the safety, Lactobacillus plantarum, Lactococcus lactis subsp. cremoris, and Leuconostoc lactis were suggested as promising candidates to improve the color of meat products. - Lactococcus lactis Subsp. Cremoris Produces Zinc Protoporphyrin IX Both Aerobically and Anaerobically and Improves the Bright Red Color of Fermented Meat Products.
Md Kauser-Ul-Alam, Yu Toba, Shoji Hioki, Toru Hayakawa, Haruto Kumura, Jun-Ichi Wakamatsu
Foods (Basel, Switzerland), 9, 11, 2020年10月31日, [査読有り], [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), This study assessed the color improvement via zinc protoporphyrin IX (ZnPP) formation in nitrite-free, dry-cured sausages processed using five varieties of ZnPP-forming lactic acid bacteria (LAB). The ZnPP contents and color intensity of the sausages and other technological properties were analyzed during the processing of sausages. LAB count and acidity significantly increased in the LAB-inoculated sausages compared to the control group. The bright red color was observed both inside and outside the sausages inoculated with Lactococcus lactis subsp. cremoris and Leuconostoc lactis. However, a brown color was observed on the surface of the sausage inoculated with Lactobacillus spp. The redness of Lactococcus lactis subsp. cremoris-inoculated sausages was close to that of the nitrite-added group. Moreover, the external bright red color was improved by Lactococcus lactis subsp. cremoris due to the aerobic formation of ZnPP. Therefore, Lactococcus lactis subsp. cremoris can be used to improve the color of fermented meat products. - Searching for high ZnPP-forming edible bacteria to improve the color of fermented meat products without nitrite/nitrate.
Md Asaduzzaman, Momo Ohya, Haruto Kumura, Toru Hayakawa, Jun-Ichi Wakamatsu
Meat science, 165, 108109, 108109, 2020年07月, [査読有り], [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), In order to improve the color of meat products by producing zinc protoporphyrin IX (ZnPP) in meat, we searched for edible bacteria with high ZnPP-forming ability. Eleven bacteria used in different animal products and 126 bacteria isolated from environmental and probiotic sources were assessed for their ability to form ZnPP. Many bacteria from both sources showed a high ZnPP-forming ability. Only three edible bacteria were identified from the 44 high ZnPP-forming isolates with 16S rRNA gene sequencing. High ZnPP-forming bacteria from both sources were inoculated in aseptic salt-added minced meat, and their ZnPP-forming abilities were evaluated. Lactococcus lactis, Leuconostoc mesenteroides, and Enterococcus faecium from environmental isolates produced a brighter red color, higher ZnPP autofluorescence and fluorescence intensity in salt-added minced meat than control. Furthermore, after heating, the color and ZnPP autofluorescence of the inoculated minced meat persisted to a degree. Therefore, it is possible to improve the color of meat products without nitrite/nitrate by using these promising ZnPP-forming edible bacteria. - Adjunctive application of solid-state culture products and its freeze-dried powder from Aspergillus sojae for semihard cheese.
Chintagavongse N, Yoneda T, Ming-Hsuan C, Hayakawa T, Wakamatsu JI, Tamano K, Kumura H
Journal of the Science of Food and Agriculture, 100, 13, 4834, 4839, 2020年06月, [査読有り], [国際誌]
英語, 研究論文(学術雑誌), BACKGROUND: Some species belonging to the genus Aspergillus have been used in traditional Japanese fermentation foods. A. sojae is the species responsible for high proteolytic activity. Freeze-drying treatments followed by physical disruption enables the pulverisation of mycelia of A. sojae RIB 1045 grown in whey protein base solid media. Through this protocol, intracellular proteases were extracted to compare extracellular protease activity in terms of the reaction pH dependence in the presence or absence of the inhibitors. RESULT: With different sensitivities to inhibitors, intracellular and extracellular proteases showed the highest activity under the acidic region, which was considered suitable for cheese application. The raw culture product (CP) and its freeze-dried product (FDP) were mixed with cheese curds prepared according to Gouda-type cheese making and were allowed to ripen for three months. Chemical analysis of the products showed 13.3% water-soluble nitrogen (WSN) in the control, which had received noncultured media, whereas 20.0% and 21.1% WSN were found in CP and FDP experimental cheese, respectively. Although these adjuncts significantly increased WSN, an insignificant difference was found between CP and FDP. Free fatty acids in all experimental cheeses were similar, showing that CP and FDP caused no rancid defects. CONCLUSION: An introduction of freeze-drying treatments accompanied by cell disruption resulted in a negligible effect in terms of WSN. However, the application of A. sojae can be beneficial when it comes to increasing the degree of WSN compared with A. oryzae, as shown in our previous study. This article is protected by copyright. All rights reserved. - 鉄,亜鉛およびポルフィリンの推移からみた食肉中の亜鉛プロトポルフィリンIX形成機構
王鴻誠, 大屋桃, 早川徹, 玖村朗人, 若松純一
日本畜産学会報, 91, 4, 389, 394, 2020年, [査読有り], [最終著者, 責任著者]
日本語, 研究論文(学術雑誌) - Improving the color of meat products without adding nitrite/nitrate using high zinc protoporphyrin IX-forming microorganisms.
Wakamatsu JI, Kawazoe H, Ohya M, Hayakawa T, Kumura H
Meat science, 161, 107989, 107989, 2019年10月, [査読有り], [最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Zinc protoporphyrin IX (ZnPP) mainly contributes to the red color of dry cured ham without nitrites/nitrates. Here, we examined the effects of acids used for pH adjustment, pH, and microorganisms on ZnPP formation. The results showed that ZnPP formation and optimal pH were dependent upon the acid type. In the presence of microorganisms, the optimal pH for ZnPP formation shifted to higher values, with the amount of formed ZnPP markedly increased at the shifted optimal pH. Additionally, two bacterial strains isolated from incubated pork homogenate exhibited an enhanced ability to form ZnPP. Although the two isolated bacteria are not edible, inoculation with one bacterium into minced meat resulted in formation of large amounts of ZnPP and color closer to that of nitrite-added meat. These results suggest that appropriate food-grade bacterial strains can improve the color of various fermented meat products in the absence of nitrites/nitrates. - Lipase and protease production of dairy Penicillium sp. on milk-protein-based solid substrates
Kumura Haruto, Satoh Megumi, Machiya Taiki, Hosono Makoto, Hayakawa Toru, Wakamatsu Jun-Ichi
INTERNATIONAL JOURNAL OF DAIRY TECHNOLOGY, 72, 3, 403, 408, WILEY, 2019年08月, [査読有り]
英語, 研究論文(学術雑誌), The lipolytic and proteolytic activity of Penicillium camemberti PC TT033 and Penicillium roqueforti PR G3, cultured on the whey solids or simulated cheese media, were compared under several pH reaction conditions. Lipolytic activity was higher when both strains had been cultured on the whey medium than on the simulated cheese medium, whereas proteolytic activity was less influenced by the culture medium. The relationship between the reaction pH and these enzyme activities was dependent on the culture medium, which suggested that the expression level and balance of isozyme rely on the culture substrate. - Investigation of contributors to zinc protoporphyrin IX formation at optimum pH 5.5 in pork.
Akter M, Shiraishi A, Kumura H, Hayakawa T, Wakamatsu JI
Animal science journal = Nihon chikusan Gakkaiho, 90, 6, 774, 780, Wiley, 2019年06月, [査読有り], [最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Optimal pH of zinc protoporphyrin IX formation in porcine muscles: Effects of muscle fiber type and myoglobin content
Jun-ichi Wakamatsu, Mofassara Akter, Fumika Honma, Toru Hayakawa, Haruto Kumura, Takanori Nishimura
LWT, 101, 599, 606, Elsevier {BV}, 2019年03月, [査読有り], [筆頭著者, 責任著者]
研究論文(学術雑誌) - Application of red pigment producing edible fungi for development of a novel type of functional cheese
Kumura, H., Ohtsuyama, T., Matsusaki, Y.-H., Taitoh, M., Koyanagi, H., Kobayashi, K., Hayakawa, T., Wakamatsu, J.-I., Ishizuka, S.
Journal of Food Processing and Preservation, 42, 10, 2018年, [査読有り]
研究論文(学術雑誌) - Myosin substitution rate is affected by the amount of cytosolic myosin in cultured muscle cells
Koichi Ojima, Emi Ichimura, Yuya Yasukawa, Mika Oe, Susumu Muroya, Takahiro Suzuki, Jun-ichi Wakamatsu, Takanori Nishimura
ANIMAL SCIENCE JOURNAL, 88, 11, 1788, 1793, WILEY, 2017年11月, [査読有り]
英語, 研究論文(学術雑誌), In striated muscles, approximately 300 myosin molecules form a single thick filament in myofibrils. Each myosin is continuously displaced by another myosin to maintain the thick filament structure. Our previous study using a fluorescence recovery after photobleaching (FRAP) technique showed that the myosin replacement rate is decreased by inhibition of protein synthesis, but myosin is still exchangeable. This result prompted us to examine whether myosin in the cytoplasm is involved in myosin replacement in myofibrils. To address this, FRAP was measured in green fluorescent protein (GFP)-tagged myosin heavy chain 3 (Myh3) expressing myotubes that were treated with streptolysin-O (SLO), which forms pores specifically in the plasma membrane to induce leakage of cytoplasmic proteins. Our biochemical data demonstrated that the cytoplasmic myosin content was reduced in SLO-permeabilized semi-intact myotubes. Furthermore, FRAP experiments showed a sluggish substitution rate of GFP-Myh3 in SLO-permeabilized myotubes. Taken together, these results demonstrate that the myosin substitution rate is significantly reduced by a decreased amount of myosin in the cytoplasm and that cytoplasmic myosin contributes to myosin replacement in myofibrils. - Enhancement of sperm motility and viability by turmeric by-product dietary supplementation in roosters
Wenjing Yan, Chihiro Kanno, Eiki Oshima, Yukiko Kuzuma, Sung Woo Kim, Hanako Bai, Masashi Takahashi, Yojiro Yanagawa, Masashi Nagano, Jun-ichi Wakamatsu, Manabu Kawahara
ANIMAL REPRODUCTION SCIENCE, 185, 195, 204, ELSEVIER SCIENCE BV, 2017年10月, [査読有り]
英語, 研究論文(学術雑誌), Improving sperm motility and viability are major goals to improve efficiency in the poultry industry. In this study, the effects of supplemental dietary turmeric by-product (TBP) from commercial turmeric production on sperm motility, viability, and antioxidative status were examined in domestic fowl. Mature Rhode Island Red roosters were divided into two groups controls (group C) without TBP administration and test subjects (group T) fed a basal diet supplemented with 0.8 g of TBP/day in a temperature-controlled rearing facility (Experiment 1) and 1.6 g/day under heat stress (Experiment 2) for 4 weeks. In Experiment 1, TBP dietary supplementation increased the sperm motility variables straight-line velocity, curvilinear velocity, and linearity based on a computer-assisted semen analysis, 2 weeks following TBP supplementation. In Experiment 2, using flow cytometry, sperm viability at 3 and 4 weeks following TBP supplementation was greater in Group T than C, and this increase was consistent with a reduction in reactive oxygen species (ROS) production at 2 and 4 weeks. The results of both experiments clearly demonstrate that dietary supplementation with TBP enhanced sperm motility in the controlled-temperature conditions as well as sperm viability, and reduced ROS generation when heat stress prevailed. Considering its potential application in a range of environments, TBP may serve as an economical and potent antioxidant to improve rooster fertility. - Diet-Induced Thermogenesis and Expression Levels of Thyroid Hormone Target Genes and Their Products in Rats Differ between Meat Proteins
Misako Ezoe, Jun-ichi Wakamatsu, Yoshihisa Takahata, Takanori Hasegawa, Fumiki Morimatsu, Takanori Nishimura
JOURNAL OF NUTRITIONAL SCIENCE AND VITAMINOLOGY, 62, 2, 93, 100, CENTER ACADEMIC PUBL JAPAN, 2016年04月, [査読有り], [責任著者]
英語, 研究論文(学術雑誌), We compared the effects of purified meat proteins on postprandial thermogenesis and on the secretion of and responsiveness to thyroid hormones (THs) in rats. Body temperatures at 2 h after feeding were significantly higher in the chicken and mutton protein groups than in the other groups, and these proteins seem to have a strong thermogenic effect. There were no significant differences in plasma TH concentrations among the groups, but levels of TH-responsive Spot 14 protein in the liver and brown adipose tissue were significantly higher in the chicken and mutton protein groups than in the other groups. Levels of malic enzyme 1 protein in the liver and brown adipose tissue were significantly higher in the chicken protein group than in the other groups except for the mutton protein group. Furthermore, levels of uncoupling protein 1 were higher in the chicken and mutton protein groups than in the other groups. The results suggest that the difference in postprandial thermogenesis of meat is strongly dependent on meat proteins; chicken and mutton proteins are strong promoters of postprandial thermogenesis, and THs may contribute to this effect. Since strong postprandial thermogenesis and high expression levels of TH target genes and their products were not observed in the amino acid group, chicken and mutton proteins or their digested peptides might contribute to these effects. - 亜鉛源としての亜鉛プロトポルフィリンIXの生物学的利用能に関する研究
若松純一, 加藤亜也奈, 江副美紗子, 西邑隆徳
日本畜産学会報, 86, 4, 481, 489, 2015年11月25日, [査読有り], [筆頭著者, 責任著者]
日本語 - Dynamics of myosin replacement in skeletal muscle cells
Koichi Ojima, Emi Ichimura, Yuya Yasukawa, Jun-ichi Wakamatsu, Takanori Nishimura
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY, 309, 10, C669, C679, AMER PHYSIOLOGICAL SOC, 2015年11月, [査読有り]
英語, 研究論文(学術雑誌), Highly organized thick filaments in skeletal muscle cells are formed from similar to 300 myosin molecules. Each thick-filament-associated myosin molecule is thought to be constantly exchanged. However, the mechanism of myosin replacement remains unclear, as does the source of myosin for substitution. Here, we investigated the dynamics of myosin exchange in the myofibrils of cultured myotubes by fluorescent recovery after photo-bleaching and found that myofibrillar myosin is actively replaced with an exchange half-life of similar to 3 h. Myosin replacement was not disrupted by the absence of the microtubule system or by actomyosin interactions, suggesting that known cytoskeletal systems are dispensable for myosin substitution. Intriguingly, myosin replacement was independent of myosin binding protein C, which links myosin molecules together to form thick filaments. This implies that an individual myosin molecule rather than a thick filament functions as an exchange unit. Furthermore, the myosin substitution rate was decreased by the inhibition of protein synthesis, suggesting that newly synthesized myosin, as well as preexisting cytosolic myosin, contributes to myosin replacement in myofibrils. Notably, incorporation and release of myosin occurred simultaneously in myofibrils, but rapid myosin release from myofibrils was observed without protein synthesis. Collectively, our results indicate that myosin shuttles between myofibrils and the nonmyofibrillar cytosol to maintain a dynamic equilibrium in skeletal muscle cells. - Role of Heavy Meromyosin in Heat-Induced Gelation in Low Ionic Strength Solution Containing l-Histidine
Toru Hayakawa, Yuri Yoshida, Masanori Yasui, Toshiaki Ito, Jun-ichi Wakamatsu, Akihito Hattori, Takanori Nishimura
JOURNAL OF FOOD SCIENCE, 80, 8, C1641, C1645, WILEY-BLACKWELL, 2015年08月, [査読有り]
英語, 研究論文(学術雑誌), The gelation of myosin has a very important role in meat products. We have already shown that myosin in low ionic strength solution containing l-histidine forms a transparent gel after heating. To clarify the mechanism of this unique gelation, we investigated the changes in the nature of myosin subfragments during heating in solutions with low and high ionic strengths with and without l-histidine. The hydrophobicity of myosin and heavy meromyosin (HMM) in low ionic strength solution containing l-histidine was lower than in high ionic strength solution. The SH contents of myosin and HMM in low ionic strength solution containing l-histidine did not change during the heating process, whereas in high ionic strength solution they decreased slightly. The heat-induced globular masses of HMM in low ionic strength solution containing l-histidine were smaller than those in high ionic strength solution. These findings suggested that the polymerization of HMM molecules by heating was suppressed in low ionic strength solution containing l-histidine, resulting in formation of the unique gel.
Practical Application The heat-induced gelation of myosin has an important role in meat products and contributes to its quality. Our previous study showed the unique gelation of myosin in low ionic strength solution with l-histidine was different from gelation already known. Understanding the mechanism of this unique gelation of myosin in low ionic strength solution with histidine will lead to development of new meat-based products and to innovation in the meat industry. - A comparative study of zinc protoporphyrin IX-forming properties of animal by-products as sources for improving the color of meat products
Jun-ichi Wakamatsu, Naoko Murakami, Takanori Nishimura
ANIMAL SCIENCE JOURNAL, 86, 5, 547, 552, WILEY-BLACKWELL, 2015年05月, [査読有り], [筆頭著者, 責任著者]
英語, 研究論文(学術雑誌), The objective of this study was to obtain fundamental data for improving the color of meat products by using animal by-products. We investigated zinc protoporphyrin IX (ZnPP)-forming properties of various internal organs from pigs and chickens. ZnPP was formed in the liver, heart and kidney, whereas the porcine spleen and bile, which are involved in the metabolism of heme, did not have ZnPP-forming properties. The optimum pH values were different among the internal organs and the ZnPP-forming properties of porcine organs were better than those of chicken organs. The porcine liver showed the greatest ZnPP-forming properties among all of the internal organs investigated in this study. The optimum pH value for ZnPP formation in the liver was lower than that of skeletal muscle. Oxygen did not inhibit the formation of ZnPP in the liver, unlike in skeletal muscle. Animal by-products such as the liver have good ability for the formation of ZnPP and might be useful for improving the color of meat products. - Comparative study of muscle regeneration following cardiotoxin and glycerol injury
Mohamed A. A. Mahdy, Hsiao Yin Lei, Jun-Ichi Wakamatsu, Yoshinao Z. Hosaka, Takanori Nishimura
ANNALS OF ANATOMY-ANATOMISCHER ANZEIGER, 202, 18, 27, ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2015年, [査読有り]
英語, 研究論文(学術雑誌), In the present study, we examined muscle regeneration following two types of chemical injuries, cardiotoxin (CTX) and glycerol, in order to compare their effect on the morphological characteristics during muscle regeneration, in addition we studied the structural changes of the intramuscular connective tissue (IMCT) during the regeneration process, by scanning electron microscopy (SEM) after digestion of the cellular elements of the muscle with sodium hydroxide.
Tibialis anterior (TA) muscles of adult male mice were injected either with CTX or glycerol. Muscle degeneration was greater in the CTX-injured model than in the glycerol-injured model at day 4 post injection. Muscle regeneration started at day 7 in both the CTX and glycerol models. However, the CTX-injured model showed a higher myotube density and larger myotube diameter than the glycerol-injured model at days 10 and 14 post injection. On other hand, adipocyte infiltration was detected in the glycerol-injured model. In contrast, no adipocytes could be detected in the CTX-injured model. Furthermore, ultrastructural analysis showed a significant difference in myofiber damage and regeneration between the two models.
SEM of the IMCT showed a transient increase in endomysial collagen deposition at early stages of. regeneration in the CTX-injured model. In contrast, glycerol-injured model showed slight endomysial collagen deposition. Our results suggest that changes in IMCT affect the efficiency of muscle regeneration. Studying the three dimensional structure of IMCT may help clinical therapies to reduce skeletal muscle fibrosis. To our knowledge this is the first time the changes in IMCT following CTX and glycerol injury using SEM-cell maceration technique have been compared. (c) 2015 Elsevier GmbH. All rights reserved. - Postprandial Thermic Effect of Chicken Involves Thyroid Hormones and Hepatic Energy Metabolism in Rats
Jun-ichi Wakamatsu, Naomasa Takabayashi, Misako Ezoe, Takanori Hasegawa, Tatsuya Fujimura, Yoshihisa Takahata, Fumiki Morimatsu, Takanori Nishimura
JOURNAL OF NUTRITIONAL SCIENCE AND VITAMINOLOGY, 59, 6, 516, 525, CENTER ACADEMIC PUBL JAPAN, 2013年12月, [査読有り], [筆頭著者, 責任著者]
英語, 研究論文(学術雑誌), We investigated the postprandial thermic effect of chicken and its mechanisms in rats. A chicken diet showed a strong thermic effect after consumption, and the removal of fat induced more rapid and stronger thermogenesis. Although thermogenesis induced by a purified chicken protein diet was also strong, the thermic reaction was not so rapid and a remarkable rise of peripheral temperatures was not observed. Defatted chicken and purified chicken protein activated the thyroid hormone system and up-regulated rate-limiting enzyme genes of glucose metabolism and the tricarboxylic acid (TCA) cycle in the liver. Moreover, chicken protein up-regulated the mRNA expression of a rate-limiting enzyme of hepatic lipid metabolism. It is possible that the mechanisms by which body temperature is raised are different between chicken protein and defatted chicken. On the other hand, it is possible that chicken fat suppressed the expression of energy metabolism-related genes that was induced by the consumption of lean chicken. As a result, a rise of postprandial body temperature might not have been induced after consumption of chicken fat. These results suggest that the consumption of lean chicken activates the thyroid hormone system and hepatic energy metabolism and consequently induces the postprandial thermic effect of chicken. - Decorin activates Akt downstream of IGF-IR and promotes myoblast differentiation
Keisuke Suzuki, Yasuhiro Kishioka, Jun-Ichi Wakamatsu, Takanori Nishimura
Animal Science Journal, 84, 9, 669, 674, 2013年09月, [査読有り]
英語, 研究論文(学術雑誌), Decorin, a small leucine-rich proteoglycan, plays an important role in cellular activities through modification of growth factors. It also acts as a signaling molecule to non-muscle cells through epidermal growth factor receptor or insulin-like growth factor I receptor (IGF-IR). However, it is unclear if decorin acts as a signaling molecule to myogenic cells. In this study, we investigated the effect of decorin on the differentiation of myoblasts and the signaling via IGF-IR to myogenic cells. C2C12 myoblasts cultured in media containing decorin for 72h showed more extensive formation of multinucleated myotubes than control cells cultured in the same media without decorin. The protein expressions of myogenin and myosin heavy chian were higher in decorn-treated cells than in control cells. These results suggest that decorin enhances the differentiation of myoblasts. Western blot analysis and immunocytochemistry showed that IGF-IR was expressed in myoblasts and myotubes. Furthermore, Akt, which is downstream of IGF-IR, was more phosphorylated in myoblasts cultured in media containing decorin than those in media without decorin. These results suggest that decorin activates Akt downstream of IGF-IR and enhances the differentiation of myogenic cells. © 2013 Japanese Society of Animal Science. - Laminin binds to myostatin and attenuates its signaling
Naofumi Yasaka, Keisuke Suzuki, Yasuhiro Kishioka, Jun-ichi Wakamatsu, Takanori Nishimura
ANIMAL SCIENCE JOURNAL, 84, 9, 663, 668, WILEY-BLACKWELL, 2013年09月, [査読有り]
英語, 研究論文(学術雑誌), Myostatin is a growth and differentiation factor and acts as a negative regulator of skeletal muscle mass. Although the mechanism whereby myostatin controls muscle cell growth is mostly clarified, the regulation of myostatin activity after its secretion into the extracellular matrix (ECM) is still unclear. In the present study, we investigated the interaction between laminin and myostatin and the effect of laminin on myostatin signaling in vitro. The surface plasmon resonance assay showed that laminin bound to mature myostatin and activin receptor type IIB (ActRIIB), but did not bind to latency-associated protein, which remains non-covalently linked to mature myostatin. Furthermore, kinetic analysis demonstrated that the affinity of mature myostatin for laminin was similar to that for ActRIIB. Next, we examined the action of laminin on the myostatin signaling pathway using a conventional reporter assay. The luciferase activity of myostatin-treated cells was repressed significantly (P < 0.05) by coincubation of laminin. These results suggest that laminin has a potential to regulate myostatin activity through binding to mature myostatin and/or its receptor ActRIIB. - Effects of meat species on the postprandial thermic effect in rats
Jun-ichi Wakamatsu, Ryoji Fujii, Kimikazu Yamaguchi, Syouhei Miyoshi, Takanori Nishimura, Akihito Hattori
ANIMAL SCIENCE JOURNAL, 84, 5, 416, 425, WILEY-BLACKWELL, 2013年, [査読有り], [筆頭著者, 責任著者]
英語, 研究論文(学術雑誌), We examined animal species differences in the postprandial thermic effect of meat and investigated the postprandial thermic effect of mutton in rats. After intake of experimental diets containing each meat, body temperatures of rats fed mutton or venison were significantly higher than that of rats fed rabbit meat. After intake of experimental diets containing fractionized mutton, the body temperatures of rats fed diets containing lean mutton protein were higher than those of rats fed diets without lean mutton protein. In a two-dimensional fluorescence difference gel electrophoresis study of brown adipose tissue, it was shown that the intake of mutton up-regulated the expression of many signaling molecules that are involved in energy metabolism. The postprandial thermic effect of mutton seems to be due not to catecholamine and adrenocorticotropic hormone but to thyroid hormones. The results suggest that intake of lean mutton protein stimulates the secretion of thyroid hormones and facilitates energy metabolism in rats. - Myostatin regulates proliferation and extracellular matrix mRNA expression in NIH3T3 fibroblasts
Yoshinao Z. Hosaka, Mika Ishibashi, Jun-ichi Wakamatsu, Masato Uehara, Takanori Nishimura
BIOMEDICAL RESEARCH-TOKYO, 33, 6, 355, 361, BIOMEDICAL RESEARCH PRESS LTD, 2012年12月, [査読有り]
英語, 研究論文(学術雑誌), The aim of this study was to clarify the effects of myostatin, which is a negative regulator of skeletal muscle mass, on the proliferation of NIH3T3 fibroblasts and the synthesis of extracellular matrix (ECM) by them. A proliferation assay revealed that myostatin attenuated cell growth at any of the doses used. High doses of myostatin strongly inhibited cell proliferation. Moreover, myostatin receptor, activin receptor type-2B (ActRIIB), was found to be distributed on cells and it was also clarified that myostatin increased the expression of cyclin-dependent kinase inhibitor p21 (p21). These results suggested that a high dose of myostatin inhibits fibroblast proliferation by the same mechanism as that for inhibition of myoblast proliferation. We then examined the effects of myostatin on the mRNA expression of ECM molecules (decorin, biglycan, type I collagen, type III collagen, type IV collagen and type V collagen) by real-time PCR. Real-time PCR showed that myostatin increased the mRNA of decorin, biglycan and collagen (types I, IV and V) in fibroblasts. The results suggest that myostatin regulates ECM synthesis in cultured fibroblasts. - Heat-induced gelation of myosin in a low ionic strength solution containing L-histidine
T. Hayakawa, Y. Yoshida, M. Yasui, T. Ito, T. Iwasaki, J. Wakamatsu, A. Hattori, T. Nishimura
MEAT SCIENCE, 90, 1, 77, 80, ELSEVIER SCI LTD, 2012年01月, [査読有り]
英語, 研究論文(学術雑誌), Binding properties are important for meat products and are substantially derived from the heat-induced gelation of myosin. We have shown that myosin is solubilized in a low ionic strength solution containing L-histidine. To clarify its processing characteristics, we investigated properties and structures of heat-induced gels of myosin solubilized in a low ionic strength solution containing t-histidine. Myosin in a low ionic strength solution formed transparent gels at 40-50 degrees C, while myosin in a high ionic strength solution formed opaque gels at 60-70 degrees C. The gel of myosin in a low ionic strength solution with t-histidine showed a fine network consisting of thin strands and its viscosity was lower than that of myosin in a high ionic strength solution at 40-50 degrees C. The rheological properties of heat-induced gels of myosin at low ionic strength are different from those at high ionic strength. This difference might be caused by structural changes in the rod region of myosin in a low ionic strength solution containing t-histidine. (C) 2011 Elsevier Ltd. All rights reserved. - 豚生産農場における液状ストレートホエイ給与が繁殖性,生産性および枝肉形質に及ぼす影響
高萩陽一, 岩渕修, 助川慎, 中胡隆, 越田雄三, 若松純一, 藤村達也, 石黒智子, 村上博, 飯村裕二, 小林泰男, 森松文毅, 川島知之, 菱沼毅
日本畜産学会報, 82, 3, 325, 331, Japanese Society of Animal Science, 2011年08月, [査読有り]
日本語, ホエイは牛乳からナチュラルチーズを製造する際に大量に生成される.本試験では国内商用豚生産農場にて繁殖雌豚,哺乳期肉豚および肥育期肉豚に対して液状ストレートホエイを通常飼料に付加する形で一定量給与し,その繁殖成績や発育成績および枝肉形質に対する効果を検証した.繁殖雌豚へ1日3-5 Lの液状ストレートホエイ給与によって一腹産子数,離乳後7日以内再発情率および受胎率がそれぞれ有意に0.2頭,3.2%および3.4%改善した.肥育期肉豚に1日1.3-1.5 Lの液状ストレートホエイを給与した場合,出荷日齢が有意に3.4日短縮することが確認された.一方,肉豚の哺乳期のみ1日0.2 Lの液状ストレートホエイ給与ではその後の発育成績の改善は認められなかった.以上の結果から,商用豚生産農場において繁殖雌豚や肥育期の肉豚に適切な量の液状ストレートホエイを給与すれば繁殖成績や発育成績の改善が期待できることがわかった. - Effect of liquid whey feeding on fecal microbiota of mature and growing pigs
Yasuo Kobayashi, Aya Itoh, Kanae Miyawaki, Satoshi Koike, Osamu Iwabuchi, Yuji Iimura, Yuri Kobashi, Tomoyuki Kawashima, Junichi Wakamatsu, Akihito Hattori, Hiroshi Murakami, Fumiki Morimatsu, Takashi Nakaebisu, Takeshi Hishinuma
ANIMAL SCIENCE JOURNAL, 82, 4, 607, 615, WILEY-BLACKWELL, 2011年, [査読有り]
英語, 研究論文(学術雑誌), The effect of liquid whey feeding on fecal bacteria and their metabolites was assessed in five pregnant sows and 66 growing pigs. Sows were fed a control diet for 4 weeks (control period) followed by the same diet but with whey feeding (5 L/day/pig) for 4 weeks (whey period). One group of growing pigs was given 267 L of whey per pig (whey group), while the other group was not (control group). In both cases, liquid whey was given separately from control diet. Sows in the whey period had feces showing lower pH, lower ammonia concentration, and larger population sizes of total bacteria, lactobacilli and bifidobacteria. The bacterial gene library analysis indicated that Mitsuokella and Megasphaera were more frequently detected, while Clostridium disporicum were detected less frequently in the whey period. Feces from whey-fed growing pigs showed lower pH than that from control pigs in the early stage of growing. Also, larger populations of total bacteria, lactobacilli and bifidobacteria were recorded in the whey group. From the bacterial gene library analysis, the detection frequency of Lactobacillus reuteri tended to be higher in the whey group. These results indicate that whey feeding influences the hindgut microbiota of pigs, possibly leading to a fermentation shift that is favorable for animal health. - Myosin filament depolymerizes in a low ionic strength solution containing L-histidine
T. Hayakawa, T. Ito, J. Wakamatsu, T. Nishimura, A. Hattori
MEAT SCIENCE, 84, 4, 742, 746, ELSEVIER SCI LTD, 2010年04月, [査読有り]
英語, 研究論文(学術雑誌), Myosin, one of the major myofibrillar proteins, forms a filamentous polymer and is insoluble in physiological and low ionic strength solutions. We have shown that myosin is soluble in a low ionic strength solution containing L-histidine. In this study, to clarify the role of L-histidine in the solubilization of myosin, we investigated effects of L-histidine on the filament formation and the morphology of myosin at a low ionic strength. In the presence of L-histidine, myosin formed a filamentous polymer in a physiological ionic strength solution and dispersed in a low ionic strength solution. Transmission electron microscopy showed that light meromyosin (LMM), the rod region of myosin, in a low ionic strength solution containing L-histidine was longer than that in a high ionic strength solution without L-histidine. L-histidine causes the elongation of LMM region of myosin contributing to the weakening of the myosin filament and the dissociation of myosin in a low ionic strength solution. (C) 2009 Elsevier Ltd. All rights reserved. - Interaction between myostatin and extracellular matrix components
Takayuki Miura, Yasuhiro Kishioka, Jun-ichi Wakamatsu, Akihito Hattori, Takanori Nishimura
ANIMAL SCIENCE JOURNAL, 81, 1, 102, 107, WILEY-BLACKWELL PUBLISHING, INC, 2010年, [査読有り]
英語, 研究論文(学術雑誌), Myostatin, a member of the TGF-beta superfamily, is a negative regulator of skeletal muscle mass. We have recently demonstrated that decorin binds to myostatin in vitro, and that immobilized decorin within the collagen matrix prevents myostatin-mediated inhibition of myoblast proliferation. However, little is known about other ECM molecules that bind to myostatin and modulate its activity. Thus, in the present study, we investigated the interaction of several other ECM molecules with myostatin. We here show that fibromodulin, fibronectin and laminin bind to myostatin in the presence of Zn(2+) with a dissociation constant (K(D) ) of 10(-10)similar to 10(-8) mol/L. Fibromodulin shows the highest affinity for myostatin among them. These results suggest that these ECM molecules may modulate myostatin activity like decorin does. - Nitric oxide inhibits the formation of zinc protoporphyrin IX and protoporphyrin IX
Jun-ichi Wakamatsu, Nobutaka Hayashi, Takanori Nishimura, Akihito Hattori
MEAT SCIENCE, 84, 1, 125, 128, ELSEVIER SCI LTD, 2010年01月, [査読有り], [筆頭著者, 責任著者]
英語, 研究論文(学術雑誌), The aim of this study was to elucidate the mechanism by which curing agents, especially nitrite, inhibit the formation of zinc protoporphyrin IX (ZPP) in dry-cured hams such as Parma ham. The oxidation-reduction potential of model solutions was increased by the addition of nitrite, but it was not clear whether the formation of ZPP is inhibited by the oxidizing property of nitrite. The effect of nitric oxide (NO) produced from nitrite on the formation of ZPP was examined. The amount of ZPP formed was decreased by the addition of NO donors. The amount of protoporphyrin IX (PPIX), which is the precursor of ZPP, was also decreased by the addition of NO donors. It is concluded that NO produced from nitrite inhibited the formation of PPIX and ZPP was therefore not formed in cured meat products with the addition of nitrite or nitrate. (C) 2009 Elsevier Ltd. All rights reserved. - Effect of L-histidine and ionic strength on disassembly of myosin filaments
Proceeding ICoMST2010, B026, 2010年
英語, 研究論文(国際会議プロシーディングス) - Thermic effect of chicken
Proceeding ICoMST2010, B026, 2010年
英語, 研究論文(国際会議プロシーディングス) - 養豚農場における液状ホエーの給与がブタの生産性へ与える影響
小橋 有里, 石黒 智子, 若松 純一, 奥村 朋之, 高萩 陽一, 岩渕 修, 飯村 裕二, 川島 知之, 小林 泰男, 服部 昭仁, 村上 博, 森松 文毅
日本畜産學會報 = The Japanese journal of zootechnical science, 80, 4, 443, 450, 社団法人日本畜産学会, 2009年11月, [査読有り]
日本語, 乳業工場から排出された液状ホエーを通常飼料に付加的に給与し,豚肉生産試験を行った.9腹の離乳豚66頭を通常飼料のみで飼育した対照区(CN区)と通常飼料に液状ホエーを付加的に給与したホエー区(Whey区)に母豚効果を配慮して分けた.Whey区には試験期間を通して267 L/頭の液状ホエーを給与した.両区は経時的に体重測定を行い,出荷直前に採血をして自然免疫の状態を比較した.平均体重は65日齢と173日齢でWhey区の方が有意に高かった(P < 0.05).日増体量はWhey区の方が生後29-65日の期間(P < 0.01)と105-173日の期間(P < 0.05)で有意に高かった.また,枝肉成績およびロース肉の理化学的特性はWhey区とCN区とで有意差は認められず,自然免疫状態についても有意差がなかった.以上の結果から,液状ホエー給与は枝肉成績および肉質に影響を与えることなくブタの出荷日齢を短縮する傾向にあり,生産性向上に有効であることが示された. - Myosin is solubilized in a neutral and low ionic strength solution containing L-histidine
T. Hayakawa, T. Ito, J. Wakamatsu, T. Nishimura, A. Hattori
MEAT SCIENCE, 82, 2, 151, 154, ELSEVIER SCI LTD, 2009年06月, [査読有り]
英語, 研究論文(学術雑誌), Myosin, one of the major myofibrillar proteins, is insoluble at low and physiological ionic strength and soluble at high ionic strength. In this study, the behavior and morphology of myosin solubilized in a low ionic strength Solution containing L-histidine (L-His) was investigated. More than 80% of myosin was solubilized in a low ionic strength solution with dialysis against a solution containing 1 mM KCl and 5 MM L-His. Transmission electron microscopy with rotary shadowing demonstrated that the rod of myosin in a low ionic strength solution containing L-His is longer than that of myosin in a high ionic strength solution. The elongation of the myosin rod in a low ionic strength solution containing L-His would inhibit the formation of a filament, resulting in the solubilization of myosin. (c) 2009 Elsevier Ltd. All rights reserved. - Quantitative determination of Zn protoporphyrin IX, heme and protoporphyrin IX in Parma ham by HPLC
Jun-ichi Wakamatsu, Hiroko Odagiri, Takanori Nishimura, Akihito Hattori
MEAT SCIENCE, 82, 1, 139, 142, ELSEVIER SCI LTD, 2009年05月, [査読有り]
英語, 研究論文(学術雑誌), We measured the contents of Zn protoporphyrin IX (ZPP), heme and protoporphyrin IX (PPIX) in Parma ham by simultaneous analysis using high-performance liquid chromatography (HPLC). Extraction with ethyl acetate-acetic acid (4:1) was suitable for the quantitative analysis of ZPP. The contents of heme, ZPP and PPIX in Parma ham were 15.0-29.9, 27.7-47.0 and 0.4-1.1 mu g/g, respectively, and total content of porphyrin was 43.7-76.6 mu g/g. The amount of ZPP in Parma ham was larger than that of heme, and ZPP accounted for 60-70% of all porphyrins. (c) 2008 Elsevier Ltd. All rights reserved. - Formation of zinc protoporphyrin IX in Parma-like ham without nitrate or nitrite
Jun-Ichi Wakamatsu, Juichi Uemura, Hiroko Odagiri, Jun Okui, Nobutaka Hayashi, Shoji Hioki, Takanori Nishimura, Akihito Hattori
ANIMAL SCIENCE JOURNAL, 80, 2, 198, 205, WILEY-BLACKWELL PUBLISHING, INC, 2009年04月, [査読有り]
英語, 研究論文(学術雑誌), Zinc protoporphyrin IX (ZPP) is a characteristic red pigment in meat products that are manufactured without the addition of a curing agent such as nitrate or nitrite. To examine the effects of impurities such as mineral components in sea salt on the formation of ZPP, we manufactured Parmatype dry-cured hams that were salted with refined salt or sea salt and examined the involvement of oxidation-reduction potential (ORP) in the formation of ZPP. The content of ZPP was increased drastically after 40 weeks. Microscopic observation showed strong fluorescence caused by ZPP muscle fiber after 40 weeks. Conversely, heme content varied considerably during processing. ORP increased during processing. However, there was no obvious difference between ham salted with refined salt and that salted with sea salt. Therefore, it was concluded that impurities in sea salt were not involved in the formation of ZPP. - Relationships between physical and structural properties of intramuscular connective tissue and toughness of raw pork
Takanori Nishimura, Suhong Fang, Jun-ichi Wakamatsu, Koui Takahashi
ANIMAL SCIENCE JOURNAL, 80, 1, 85, 90, WILEY-BLACKWELL PUBLISHING, INC, 2009年02月, [査読有り]
英語, 研究論文(学術雑誌), We studied the relationships between the shear-force value and physical and structural properties of the intramuscular connective tissue (IMCT) in six classes of porcine skeletal muscle to elucidate the contribution of IMCT to toughness of raw pork. The shear-force value of raw pork correlated significantly with that of the IMCT model prepared from each class of skeletal muscle (P < 0.05). The correlation suggested that the variable toughness of pork was caused by the mechanical strength of the endomysium and perimysium. The thickness of the secondary perimysium correlated significantly with the shear-force value of raw pork (P < 0.05) and with that of the IMCT model (P < 0.05). The shear-force value of raw pork correlated significantly with the total amount of collagen (P < 0.05) but not with the heat-solubility of collagen. We concluded therefore that the thickness of the secondary perimysium determines the mechanical strength of IMCT and contributes to toughness in raw pork. - Structural weakening of intramuscular connective tissue during postmortem aging of pork
Takanori Nishimura, Suhong Fang, Toshiaki Ito, Jun-ichi Wakamatsu, Koui Takahashi
ANIMAL SCIENCE JOURNAL, 79, 6, 716, 721, WILEY-BLACKWELL PUBLISHING, INC, 2008年12月, [査読有り]
英語, 研究論文(学術雑誌), We studied structural changes in the endomysium and perimysium during postmortem aging of pork using the cell-maceration/scanning electron microscope method. Immediately post mortem, endomysia sheaths that house individual muscle fibers displayed a honeycomb-like structure. The sheaths of the endomysium consisted of tightly arranged collagen fibrils in a random network. The perimysium comprised several layers of wavy sheets made up of tightly bundled collagen fibers. While the structure of the intramuscular connective tissues remained almost unchanged up to five days post mortem, the endomysium had resolved into individual collagen fibrils, and the thick sheets of the perimysium had separated into collagen fibers and fibrils at 8 days post mortem. These results provide direct evidence for structural weakening of the endomysium and perimysium during postmortem aging of pork. The shear-force value of raw pork decreased rapidly within six days post mortem and then decreased slowly until 14 days post mortem. Since the rapid increase in tenderness is mainly due to structural weakening of myofibrils, we conclude that the disintegration of the endomysium and perimysium contributes to tenderization of pork during extended postmortem aging. - Decorin enhances the proliferation and differentiation of myogenic cells through suppressing myostatin activity
Yasuhiro Kishioka, Mark Thomas, Jun-Ichi Wakamatsu, Akihito Hattori, Mridula Sharma, Ravi Kambadur, Takanori Nishimura
JOURNAL OF CELLULAR PHYSIOLOGY, 215, 3, 856, 867, WILEY-LISS, 2008年06月, [査読有り]
英語, 研究論文(学術雑誌), Decorin, a small leucine-rich proteoglycan, plays an important role in the regulation of cell growth. Our recent study has shown that immobilized decorin in the collagen matrix sequesters myostatin into the extracellular matrix and prevents its inhibitory action to myoblast proliferation in vitro. However, it still remains unclear whether free decorin could affect the proliferation and differentiation of myogenic cells by regulating myostatin activity. In the present study, we generated stable clonal C2C 12 myoblasts that were over-expressing decorin, and showed that decorin over-expressing cells had an increased rate of proliferation as compared to control cells. Decorin over-expressing cells formed multi-giant hypertrophic myotubes with an elongated morphology and larger size as compared to control cells, although the initiation of differentiation in decorin over-expressing cells was somewhat delayed as compared to control cells. Western blot analysis demonstrated that MyoD expression in decorin over-expressing cells was lower than that in control cells until 12 h after induction to differentiate. At 48-h differentiation, the expressions of MyoD, p21 and myogenin were dramatically increased in cells that over-expressed decorin. Furthermore, we revealed that over-expression of decorin suppressed the activity of myostatin endogenously synthesized in C2C 12 myoblasts and attenuated the signaling of exogenous myostatin. Consistent with these results, knockdown of decorin impairs C2C 12 myoblast growth by increasing the sensitivity to exogenous myostatin. These results clearly show that decorin enhances the proliferation and differentiation of C2C 12 myoblasts through suppressing myostatin activity. - Decorin expression in quiescent myogenic cells
Takanori Nishimura, Kenjiro Nozu, Yasuhiro Kishioka, Jun-ichi Wakamatsu, Akihito Hattori
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 370, 3, 383, 387, ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008年06月, [査読有り]
英語, 研究論文(学術雑誌), Satellite cells are quiescent muscle stem cells that promote postnatal muscle growth and repair. When satellite cells are activated by myotrauma, they proliferate, migrate, differentiate, and ultimately fuse to existing myofibers. The remainder of these cells do not differentiate, but instead return to quiescence and remain in a quiescent state until activation begins the process again. This ability to maintain their own population is important for skeletal muscle to maintain the capability to repair during postnatal life. However, the mechanisms by which satellite cells return to quiescence and maintain the quiescent state are still unclear. Here, we demonstrated that decorin mRNA expression was high in cell cultures containing a higher ratio of quiescent satellite cells when satellite cells were stimulated with various concentrations of hepatocyte growth factor. This result suggests that quiescent satellite cells express decorin at a high level compared to activated satellite cells. Furthermore, we examined the expression of decorin in reserve cells, which were undifferentiated myoblasts remaining after induction of differentiation by serum-deprivation. Decorin mRNA levels in reserve cells were higher than those in differentiated myotubes and growing myoblasts. These results suggest that decorin participates in the quiescence of myogenic cells. (c) 2008 Elsevier Inc. All rights reserved. - Inhibition of matrix metalloproteinases suppresses the migration of skeletal muscle cells
Takanori Nishimura, Kazuki Nakamura, Yasuhiro Kishioka, Yuko Kato-Mori, Jun-ichi Wakamatsu, Akihito Hattori
JOURNAL OF MUSCLE RESEARCH AND CELL MOTILITY, 29, 1, 37, 44, SPRINGER, 2008年01月, [査読有り]
英語, 研究論文(学術雑誌), Skeletal muscle satellite cells are quiescent stem cells that localized between the plasmalemma and the basement membrane of muscle fiber. When muscle is injured, satellite cells are activated, migrate to the injured site and contribute to the regeneration of muscle. However, little is known about the mechanism by which satellite cells migrate underneath the basement membrane. To clarify this, we investigated the effect of MMP inhibition on the migration of C2C12 muscle cells in vitro using a time-lapse imaging system. The migration speed of cells cultured with an MMP-inhibitor reagent was significantly lower (P < 0.01) than the control cultured without an inhibitor reagent. The persistency index was significantly higher (P < 0.01) in cells cultured with an inhibitor than in those without an inhibitor. Furthermore, MMP-3 knockdown cells migrated faster than control cells. These results strongly suggest that MMPs synthesized in skeletal muscle cells play an important role in the migration of these cells. - Zn protoporphyrin IX is formed not from heme but from protoporphyrin IX
Jun-ichi Wakamatsu, Jun Okui, Nobutaka Hayashi, Takanori Nishimura, Akihito Hattori
MEAT SCIENCE, 77, 4, 580, 586, ELSEVIER SCI LTD, 2007年12月, [査読有り]
英語, 研究論文(学術雑誌), We examined the effects of exogenous myoglobin, a bivalent chelator, and nitrite on Zn protoporphyrin IX (ZPP) formation by using model systems. ZPP was formed in a model solution without addition of exogenous myoglobin. After incubation, the amount of ZPP in a model solution was increased but that of heme was not decreased compared with the amounts before incubation. Protoporphyrin IX (PPIX) instead of ZPP also accumulated in a model solution with addition of EDTA, but the amount of heme was not reduced. These results suggested that ZPP was not formed by the Fe-Zn substitution in heme but was formed by the insertion of Zn into PPIX, which was formed independently. The fact that the effects of various factors in model systems with/without addition of a bivalent chelator were similar suggested that ZPP formation was strongly affected by PPIX formation. Inhibition of PPIX formation by nitrite might be the reason for the low levels of ZPP in cured meats. (C) 2007 Elsevier Ltd. All rights reserved. - Spatiotemporal expression of decorin and myostatin during rat skeletal muscle development
Takanori Nishimura, Kohei Oyama, Yasuhiro Kishioka, Jun-ichi Wakamatsu, Akihito Hattori
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 361, 4, 896, 902, ACADEMIC PRESS INC ELSEVIER SCIENCE, 2007年10月, [査読有り]
英語, 研究論文(学術雑誌), Decorin, a small leucine-rich proteoglycans, plays an important role in tissue morphogenesis through the regulation of collagen fibrillogenesis and the modulation of some growth factors. Our recent study has shown that decorin binds to myostatin, a negative regulator of skeletal muscle mass, and modulates its inhibitory action to myogenic cell growth in vitro. However, it still remains unclear whether decorin binds to myostatin in vivo during the development of skeletal muscle. To clarify this, we investigated the spatiotemporal expression of decorin and myostatin in rat skeletal muscle by RT-PCR and immunohistochemistry. Decorin mRNA abundance in fetal skeletal muscle was significantly higher than those in neonates and adults (P < 0.05). Decorin mRNA expression decreased drastically at birth, and thereafter gradually up to 9 weeks of age. The mRNA expression pattern of myostatin was quite similar to that of decorin during prenatal and postnatal development of rat skeletal muscle. Immunohistochemical analysis demonstrated that myostatin was located in the muscle fibers, and that decorin was located in the periphery of muscle fibers in fetal rat skeletal muscle. Taken together with our previous data, these results suggest that decorin binds myostatin and sequesters it in the ECM during the development of rat skeletal. (C) 2007 Elsevier Inc. All rights reserved. - Direct demonstration of the presence of zinc in the acetone-extractable red pigment from Parma ham
Jun-ichi Wakamatsu, Toshiaki Ito, Takanori Nishimura, Akihito Hattori
MEAT SCIENCE, 76, 2, 385, 387, ELSEVIER SCI LTD, 2007年06月, [査読有り]
英語, 研究論文(学術雑誌), We studied the presence of zinc in the red pigment extracted from Parma ham by scanning electron microscopy/energy dispersive X-ray microanalysis. The large peak of about 8.6 keV and the small peaks at about 1.1 keV and 9.5 keV were derived from K-alpha L-alpha 1 and K-beta X-ray of zinc, respectively. Thus, the results suggested that zinc existed in the red pigment extracted from Parma ham. In contrast, the K X-ray peak of iron (6.4 keV) was not detected and the K-alpha X-ray peak of magnesium (1.3 keV) was hardly detected. These results revealed that the red pigment contained not iron but zinc. In addition to the results of mass analysis in previous studies, the red pigment was demonstrated to be zinc protoporphyrin IX. (c) 2006 Elsevier Ltd. All rights reserved. - Observation of the distribution of Zn protoporphyrin IX (ZPP) in Parma ham by using purple LED and image analysis
J. Wakamatsu, H. Odagiri, T. Nishimura, A. Hattori
MEAT SCIENCE, 74, 3, 594, 599, ELSEVIER SCI LTD, 2006年11月, [査読有り]
英語, 研究論文(学術雑誌), We investigated the distribution of Zn protoporphyrin IX (ZPP) in Parma ham by using purple LED light and image analysis in order to elucidate the mechanism of ZPP formation. Autofluorescence spectra of Parma ham revealed that ZPP was present in both lean meat and fat, while red emission other than that of ZPP was hardly detected. Although ZPP was found to be distributed widely in Parma ham, it was more abundant in intermuscular fat and subcutaneous fat than in lean meat. The intensity of red emission was weak in muscles that were exposed during the processing. ZPP in both lean meat and subcutaneous fat tended to be more abundant in the inner region than in the outer region. It was thought that ZPP is transferred from lean meat to fat tissue during the processing, resulting in the small amount of ZPP in the lean meat adjacent to subcutaneous fat. Our results led to a completely new hypothesis that ZPP is formed in lean meat and transferred to fat tissue. (c) 2006 Elsevier Ltd. All rights reserved. - Decorin binds myostatin and modulates its activity to muscle cells
T Miura, Y Kishioka, J Wakamatsu, A Hattori, A Hennebry, CJ Berry, M Sharma, R Kambadur, T Nishimura
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 340, 2, 675, 680, ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006年02月, [査読有り]
英語, 研究論文(学術雑誌), Myostatin, a member of TGF-beta superfamily of growth factors, acts as a negative regulator of skeletal muscle mass. The mechanism whereby myostatin controls the proliferation and differentiation of myogenic cells is mostly clarified. However, the regulation of myostatin activity to myogenic cells after its secretion in the extracellular matrix (ECM) is still unknown. Decorin, a small leucine-rich proteoglycan, binds TGF-beta and regulates its activity in the ECM. Thus, we hypothesized that decorin could also bind to myostatin and participate in modulation of its activity to myogenic cells. In order to test the hypothesis, we investigated the interaction between myostatin and decorin by surface plasmon assay. Decorin interacted with mature myostatin in the presence of concentrations of Zn2+ greater than 10 mu M, but not in the absence of Zn2+. Kinetic analysis with a 1:1 binding model resulted in dissociation constants (K-D) of 2.02 x 10(-8) M and 9.36 x 10(-9) M for decorin and the core protein of decorin, respectively. Removal of the glycosaminoglycan chain by chondroitinase ABC digestion did not affect binding, suggesting that decorin could bind to myostatin with its core protein. Furthermore, we demonstrated that immobilized decorin could rescue the inhibitory effect of myostatin on myoblast proliferation in vitro. These results suggest that decorin could trap myostatin and modulate its activity to myogenic cells in the ECM. (c) 2005 Elsevier Inc. All rights reserved. - Species and muscle differences in L-carnitine levels in skeletal muscles based on a new simple assay
K Shimada, Y Sakuma, J Wakamatsu, M Fukushima, M Sekikawa, K Kuchida, M Mikami
MEAT SCIENCE, 68, 3, 357, 362, ELSEVIER SCI LTD, 2004年11月, [査読有り]
英語, 研究論文(学術雑誌), We have adapted the enzymatic method [Biochemical and Biophysical Research Communications 176 (3) (1991) 1617] for the safe and rapid assay of L-carnitine (L-CA) in skeletal muscle using a microplate reader. The concentration of L-CA in fresh semitendinosus muscle from broiler chicken, pig, beef cattle, deer, horse and goat muscle were 0.69, 1.09, 1.86-3.57, 4.57, 4.95 and 11.36 mumol/g wet weight, respectively. The animals which had higher concentration of L-CA, also had the highest amounts of myoglobin as an index to the redness of the muscle. Furthermore, we investigated this relationship between white muscle, M. pectoralis profundus. and red muscle, M. soleus, in laying hens. The L-CA and myoglobin concentration in red muscle were significantly higher than those in white muscle (p < 0.01). These findings suggest that L-CA concentration in muscle is related to oxygen metabolism and to myofiber types. (C) 2004 Elsevier Ltd. All rights reserved. - Establishment of a model experiment system to elucidate the mechanism by which Zn-protoporphyrin IX is formed in nitrite-free dry-cured ham
J Wakamatsu, J Okui, Y Ikeda, T Nishimura, A Hattori
MEAT SCIENCE, 68, 2, 313, 317, ELSEVIER SCI LTD, 2004年10月, [査読有り]
英語, 研究論文(学術雑誌), The aim of this study was to establish a model experiment system to elucidate the mechanism by which Zn-protoporphyrin IX (ZPP) is formed in Parma ham. The established model consisted of myoglobin, meat and antibiotics, and incubation under anaerobic conditions resulted in a greater yield of ZPP. Formation of ZPP was observed even in the presence of various antiseptics. The amount of ZPP formed increased as the period of incubation increased. ZPP formation was inhibited by heating meat homogenate depending on the heating temperature. Our results show that anaerobic conditions are suitable for the formation of ZPP in meat products without nitrate or nitrite and that endogenous enzymes as well as microorganisms may be involved in ZPP formation. (C) 2004 Elsevier Ltd. All rights reserved. - A Zn-porphyrin complex contributes to bright red color in Parma ham
J Wakamatsu, T Nishimura, A Hattori
MEAT SCIENCE, 67, 1, 95, 100, ELSEVIER SCI LTD, 2004年05月, [査読有り]
英語, 研究論文(学術雑誌), The Italian traditional dry-cured ham (Parma ham) shows a stable bright red color that is achieved without the use of nitrite and/or nitrate. In this study we examined the pigment spectroscopically, fluoroscopically and by using HPLC and ESI-HR-MASS analysis. Porphyrin derivative other than acid hematin were contained in the HO-containing acetone extract from Parma ham. A strong fluorescence peak at 588 nm and a weak fluorescence peak at 641 mn were observed. By HPLC analysis the acetone extract of Parma ham was observed at the single peak, which eluted at the same time as Zn-protoporphyrin IX and emitted fluorescence. The results of ESI-HR-MS analysis showed both agreement with the molecular weight of Zn-protoporphyrin IX and the characteristic isotope pattern caused by Zn isotopes. These results suggest that the bright red color in Parma ham is caused by Zn-protoporphyrin IX. (C) 2003 Elsevier Ltd. All rights reserved. - Physicochemical properties of water-soluble myofibrillar proteins prepared from chicken breast muscle
Yukiko Ito, Shinji Toki, Takashi Omori, Hiroshi Ide, Ryuichi Tatsumi, Jun-Ichi Wakamatsu, Takanori Nishimura, Akihito Hattori
Animal Science Journal, 75, 1, 59, 65, 2004年02月, [査読有り]
英語, 研究論文(学術雑誌), The solubility of skeletal muscle myofibrillar proteins in water was examined. The solubility of the proteins was found to be sensitive to ionic strength and pH of the solution. At the ionic strength of less than 12 mM and neutral pH, more than 80% of myofibrillar proteins were solubilized. Heating at a temperature of more than 70°C was required for the proteins to retain their solubility. The solubility of freeze-dried protein powder prepared from water-soluble myofibrillar proteins was also examined, and it was found that addition of trehalose and heating were essential for re-solubilization in water. Amino acid composition of water-soluble myofibrillar proteins was found to be almost the same as that of myofibrillar proteins. - Effect of skeletal muscle decorin on collagen fibrillogenesis in vitro
Takanori Nishimura, Ayaka Taneichi, Jun-Ichi Wakamatsu, Akihito Hattori
Animal Science Journal, 74, 5, 399, 405, 2003年10月, [査読有り]
英語, 研究論文(学術雑誌), The effect of skeletal muscle decorin on collagen fibrillogenesis was investigated, in order to provide background for understanding the functions of decorin in skeletal muscle. The self-assembly of type I and III collagen with the addition of decorin or the core protein of decorin from bovine neonatal skeletal muscle was monitored using a spectrophotmeter. Time course changes in the absorbance of collagen solutions showed typical sigmoidal curves composed of three phases. The time of the initial phase was not different between the collagen solution with decorin and that without decorin. The increase rate of the absorbance in the second phase decreased with concentration of decorin added in collagen solutions. Similar effects on fibrillogenesis of type I and III collagens were observed when the core protein of decorin was added in collagen solutions. These results suggest that regulation of collagen fibrillogenesis by decorin depends on its core protein. The networks of reconstructed collagen fibrils with decorin were looser than those without decorin. Bovine skeletal muscle decorin could participate in the regulation of collagen fibrillogenesis and in the arrangement of collagen fibrils in the intramuscular connective tissue. - The solubilization of myofibrillar proteins of vertebrate skeletal muscle in water
Yukiko Ito, Ryuichi Tatsumi, Jun-Ichi Wakamatsu, Takanori Nishimura, Akihito Hattori
Animal Science Journal, 74, 5, 417, 425, 2003年10月, [査読有り]
英語, 研究論文(学術雑誌), Myofibrillar proteins of vertebrate skeletal muscles are insoluble in solutions of ionic strength that approximate physiological conditions. We established a method to solubilize more than 80% of chicken breast muscle myofibrillar proteins in water for the use of meat as a source of food protein. SDS-polyacrylamide gel electrophoretic patterns of water-soluble myofibrillar proteins demonstrated that all identified myofibrillar proteins except connectin/titin were soluble in water. A part of α-actinin was released from myofibrils by repeated washing with 2.5 mmol/L NaCl and 5 mmol/L L-histidine solution, and subsequent destruction of connectin/titin in washed myofibrils by ultrasonication resulted in solubilization of a large fraction of chicken breast muscle myofibrillar proteins in water. Myofibrillar proteins of chicken leg, pork loin, beef shoulder loin, and lamb were also solubilized in water using this procedure. - Identification and characterization of proteoglycans in bovine neonatal skeletal muscle
Takanori Nishimura, Eiko Futami, Jun-Ichi Wakamatsu, Akihito Hattori
Animal Science Journal, 74, 5, 407, 416, 2003年10月, [査読有り]
英語, 研究論文(学術雑誌), In order to provide background for understanding biological roles of proteoglycans (PG) in developing skeletal muscle, we have isolated and characterized PG in bovine neonatal skeletal muscle. Two types of PG were isolated from skeletal muscle by density gradient ultracentrifugation and ion-exchange chromatography. One was a small PG (PG-S) with a molecular size of 100-130 kDa, another was a large PG (PG-L) with a molecular size of 300-500 kDa. The glycosaminoglycan chains of PG-S and PG-L were dermatan sulfate and chondroitin sulfate, respectively, judged by cellulose acetate membrane electrophoresis. Immunoblot assays revealed that both PG bound to type I, II, III and IV collagen, laminin and fibronectin. Unlike PG-S, PG-L bound to type V collagen and hyaluronic acid. Small proteoglycans had a core protein of 45 kDa, which reacted with the antibody against the decorin core protein. The N-terminal amino acid sequence of the PG-S core protein was consistent with that of decorin from bovine bone and tendon. Thus, PG-S from neonatal skeletal muscle was identified as decorin in bovines. Immunohistochemical analysis with antibodies against PG-L and PG-S demonstrated that PG-L was located both in the perimysium and endomysium, but PG-S was localized exclusively in the perimysium. These findings suggest that the characterized PG may have distinct roles in the ECM construction of developing skeletal muscle. - Localization of paratropomyosin in chicken skeletal muscle myofibrils and its behavior during postmortem storage of muscles revealed by immunoelectron microscopy
A Hattori, S Fujimoto, T Nishimura, R Tatsumi, J Wakamatsu, T Ito
JOURNAL OF MUSCLE FOODS, 14, 1, 1, 10, FOOD NUTRITION PRESS INC, 2003年03月, [査読有り]
英語, 研究論文(学術雑誌), Paratropomyosin is a minor myofibrillar protein which in freshly prepared myofibrils is exclusively localized at the A-I junction region of sarcomeres. We investigated the ultrastructural localization of paratropomyosin in intact and postrigor myofibrils by immunoelectron microscopy. Paratropomyosin was localized as two distinct stripes at the A-I junction in intact myofibrils. It also was localized at the position corresponding to the original A-I junction in thick filament-free myofibrils (I-Z-I brushes). However, following postmortem storage, paratropomyosin was found broadly distributed in thin filaments of myofibrils. - Presence of ubiquitin in bovine post-mortem cardiac muscle
M Sekikawa, K Shimada, M Fukushima, T Ishikawa, J Wakamatsu, M Mikami
FOOD CHEMISTRY, 69, 3, 315, 318, ELSEVIER SCI LTD, 2000年05月, [査読有り]
英語, 研究論文(学術雑誌), We prepared sarcoplasmic proteins from bovine cardiac muscle immediately after slaughter (1.0 h; 0 days) and from stored muscle at 1, 2 and 7 days post-mortem for SDS-PAGE and Western blotting analysis. Characterization of the ubiquitin antiserum (Sigma, St Louis) showed clear and strong recognition of the ubiquitin band (8.6 kDa) and another minor band (17 kDa) in the purified ubiquitin sample (Sigma, St Louis). Among the sarcoplasmic proteins prepared from stored muscle at 0 and 7 days, this antiserum also reacted with bands corresponding to purified ubiquitin and small amounts of some other, higher-molecular-mass proteins (about 25 and 30 kDa) which were considered to be ubiquitin-protein conjugates. However, the 25 kDa band was faint in the 7 days sample, suggesting that it had degraded. We compared these results with those from oar previous study of bovine skeletal muscles, in which both ubiquitin and the ubiquitin-protein conjugates had almost disappeared in the samples tested at 10 days post mortem. (C) 2000 Elsevier Science Ltd. All rights reserved. - 牛肉の抗疲労効果について
若松 純一, 長尾 哲二, 沼田 正寛, 中村 豊郎, 藤巻 正生
日本畜産學會報 = The Japanese journal of zootechnical science, 68, 6, 579, 586, 社団法人 日本畜産学会, 1997年06月, [査読有り]
日本語, 研究論文(学術雑誌), 食肉,特に牛肉は活力•精力の増強のイメージが強いため,疲労の低減や疲労回復といった特有の生体調節機能を有すると期待される.今回我々は,マウスを用いた運動負荷実験において,牛肉が疲労を低減するかどうかについて調査した.いずれの群においても実験期間中の体重の推移に違いはみられなかった.また,飼料摂取量においても,群間で有意差はみられなかった.さらに,一般状態に異常が認められなかったことから,牛肉,牛脂の長期連続摂取は成熟マウスの生育に悪影響を及ぼさないことがわかった.牛肉+牛脂群において,カゼイン+植物油群と比較し,遊泳時間に有意な延長がみられた(p<0.05).カゼイン+牛脂群の遊泳時間にも延長がみられたが,カゼイン+植物油群との有意差は確認されなかった.牛肉+牛脂群およびカゼイン+牛脂群は,懸垂持続試験において強制泳3分後の懸垂持続時間に有意な延長がみられた(p<0.05).強制遊泳30分後では,牛肉+牛脂群のみがカゼイン+植物油群と比較して懸垂持続時間に有意な延長がみられた(p<0.05).これらの結果から,牛肉,特に赤肉部分に抗疲労効果があることが示唆された.カゼインを供試したマウスの血漿中のグルコースおよび乳酸含量は,運動負荷前と比較して大幅に低下したが(p<0.05),牛肉+牛脂を供試したマウスでは負荷前と比べ,血糖はほぼ同等,乳酸については若干の増加がみられた.牛肉+牛脂群におけるこれらの血液成分の変化は,カゼイン+植物油群と比較して小さいものとなった. - はんぺん風ソーセージの製造とその物性および官能評価
若松 純一, 沼田 正寛, 中村 豊郎
日本食品科学工学会誌 : Nippon shokuhin kagaku kogaku kaishi = Journal of the Japanese Society for Food Science and Technology, 44, 7, 516, 521, 社団法人 日本食品科学工学会, 1997年, [査読有り]
日本語, 研究論文(学術雑誌), ''Hanpen''-like whipped sausages with powdered yam as a foaming material were produced and evaluated by an organoleptic test and texture analysis. As the results of using a continuous whipping machine, cohesiveness of the product decreased only about 20%, but hardness, adhesiveness and gumminess decreased 67 similar to 75%. Ten% fat content was most desirable in an organoleptic test. In the experiment, the organoleptically most desirable fat and powdered yam content were 10% and 1%, respectively. Varying the specific gravity by the amount of flowing air of a continuous whipping machine, the specific gravity of the organoleptically most desirable product was 0.6 +/- 0.05. Xanthan gum and/or monoglyceride were added to improve the form stability and emulsification of products. Each evaluations of the added products was higher than a product with no addition. - CHARACTERIZATION OF A NOVEL 550-KDA PROTEIN IN SKELETAL-MUSCLE OF CHICK-EMBRYO
A HATTORI, J WAKAMATSU, T ISHII, K KUWAHARA, R TATSUMI
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS, 1245, 2, 201, 206, ELSEVIER SCIENCE BV, 1995年10月, [査読有り]
英語, 研究論文(学術雑誌), Some characteristics of a novel 550-kDa protein which is abundant in skeletal muscle tissues at an early stage of the chick embryo, and localized in the peripheries of adult muscle fibers and at the Z-disks of isolated myofibrils, was investigated, A cosedimentation experiment and solid phase immunoabsorbent assay showed that the 550-kDa protein binds directly to F-actin. Therefore, it is concluded that the 550-kDa protein is a novel actin-binding protein. The 550-kDa protein was also interacted with alpha-actinin, taminin, fibronectin and Type IV collagen, Reactions with several kinds of lectin revealed that the 550-kDa protein is a glycoprotein containing oligosaccharides. Electron microscopic observation of negatively stained 550-kDa protein showed that native 550-kDa protein molecules are particles with an average diameter of 26.5 nm, but those particles treated with ethanol/ether are filamentous structures. These results suggest that the 550-kDa protein in the cytoplasm of unorganized skeletal muscle tissues exists as lipid-protein complex. Consequently, the 550-kDa protein may play an important role in the binding of myofibrils to the basal lamina by interaction with F-actin, cu-actinin, laminin, fibronectin or Type IV collagen. - A NOVEL 550-KDA PROTEIN IN SKELETAL-MUSCLE OF CHICK-EMBRYO - PURIFICATION AND LOCALIZATION
A HATTORI, J WAKAMATSU, T ISHII, K KUWAHARA, R TATSUMI
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS, 1245, 2, 191, 200, ELSEVIER SCIENCE BV, 1995年10月, [査読有り]
英語, 研究論文(学術雑誌), We have found a novel protein with a molecular mass of 550 kDa on SDS-polyacrylamide gels, which is abundant in skeletal muscle tissues at an early stage of chick embryonic development. The 550-kDa protein decreased with the progress of development, and only a slight amount of the protein was present in adult chicken skeletal muscle. The 550-kDa protein was purified from the cytoplasm of 18 day embryos by a procedure including ultracentrifugation and gel filtration. The purified 550-kDa protein was essentially free of contaminants as judged by SDS-PAGE. By immunofluorescence and immunoelectron microscopy using the antibody raised against the 550-kDa protein, this protein was shown to be localized in the peripheries of adult muscle fibers and at the Z-disks of isolated myofibrils. These findings have led us to conclude that the 550-kDa protein is a novel myofibrillar protein in chicken skeletal muscle.
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日本語 - Myosin dynamically shuttles between myofibrils and non-myofibrillar cytosol in living skeletal muscle cells.
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川添穂高, 白石阿紀子, 若松純一, 西邑隆徳, 日本畜産学会大会講演要旨, 115th, 242, 2012年03月
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吉田有里, 安川裕也, 若松純一, 西邑隆徳, 日本畜産学会大会講演要旨, 115th, 249, 2012年03月
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日本語 - L‐ヒスチジンを含む中性低イオン強度溶液におけるミオシンの水溶化について
早川徹, 若松純一, 西邑隆徳, 食肉の科学, 52, 1, 116-119, 119, 2011年06月30日
日本食肉研究会, 日本語 - Rheological properties of heat-induced gels of myosin solubilized in a low ionic strength solutioncontaining L-histidine
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高林 尚将, 藤井 亮二, 佐藤 三佳子, 高畑 能久, 森松 文毅, 若松 純一, 西邑 隆徳, 日本畜産学会大会講演要旨集, 112回, 119, 119, 2010年03月
(公社)日本畜産学会, 日本語 - 国内豚生産農場におけるホエイを利用した豚肉生産
小橋有里, 小橋有里, 石黒智子, 高萩陽一, 奥村朋之, 岩渕修, 飯村裕二, 川島知之, 小林泰男, 若松純一, 服部昭人, 村上博, 森松文毅, 日本畜産学会大会講演要旨, 110th, 45, 2009年03月27日
日本語 - チーズホエイの飲用が豚の糞便菌叢におよぼす影響
伊藤綾, 小池聡, 小林泰男, 若松純一, 服部昭仁, 岩渕修, 飯村裕二, 小橋有里, 小橋有里, 村上博, 森松文毅, 川島知之, 日本畜産学会大会講演要旨, 110th, 45, 2009年03月27日
日本語 - パルマハムに存在する赤色色素「亜鉛プロトポルフィリンIX」
若松 純一, 食肉の科学, 49, 2, 157, 169, 2008年11月
日本食肉研究会, 日本語, 記事・総説・解説・論説等(学術雑誌) - ミオシンに対する亜臨界水処理がアミノ酸の遊離およびペプチド生成に及ぼす影響
浦木健太郎, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 109th, 74, 2008年03月27日
日本語 - 食肉タンパク質に対する亜臨界水処理がアミノ酸の遊離・分解に及ぼす影響
浦木健太郎, 高橋潤一, 阿部茂, 錦織孝史, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 107th, 131, 2007年03月27日
日本語 - 二価金属イオン存在下におけるミオスタチンと細胞外マトリックス分子の相互作用
高石真樹, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 107th, 102, 2007年03月27日
日本語 - 乾塩漬ハム製造過程における亜鉛プロトポルフィリンIX(ZPP)形成と酸化還元電位
植村寿一, 奥井潤, 小田切浩子, 林宣隆, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 107th, 131, 2007年03月27日
日本語 - Postmortem sarcomere length characterization between Psoas major and Longissimus dorsi muscles in cattle
I. Zapata, M. Yamaguchi, J. Wakamatsu, A. Hattori, M. Wick, JOURNAL OF ANIMAL SCIENCE, 85, 380, 380, 2007年
AMER SOC ANIMAL SCIENCE, 英語, 研究発表ペーパー・要旨(国際会議) - Postmortem sarcomere length characterization between Psoas major and Longissimus dorsi muscles in cattle
I. Zapata, M. Yamaguchi, J. Wakamatsu, A. Hattori, M. Wick, POULTRY SCIENCE, 86, 380, 380, 2007年
POULTRY SCIENCE ASSOC INC, 英語, 研究発表ペーパー・要旨(国際会議) - Postmortem sarcomere length characterization between Psoas major and Longissimus dorsi muscles in cattle
I. Zapata, M. Yamaguchi, J. Wakamatsu, A. Hattori, M. Wick, JOURNAL OF DAIRY SCIENCE, 90, 380, 380, 2007年
AMER DAIRY SCIENCE ASSOC, 英語, 研究発表ペーパー・要旨(国際会議) - 亜臨界処理による豚血液利用の実証試験
沖浦 智紀, 飯倉 一雄, 大石 泰之, 森松 文毅, 若松 純一, 西邑 隆徳, 服部 昭仁, 山田 良司, 食肉の科学, 47, 1, 159, 163, 2006年06月30日
日本食肉研究会, 日本語 - 亜鉛プロトポルフィリンIX(ZPP)形成に及ぼすpHと遊離亜鉛濃度の影響
植村寿一, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 106th, 165, 2006年03月20日
日本語 - 紫色LEDとだいだい色フィルターを用いたパルマハムにおける亜鉛プロトポルフィリンIX(ZPP)の局在の観察
小田切浩子, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 106th, 165, 2006年03月20日
日本語 - Matrix Metalloproteinase Inhibitor Suppresses Skeletal Muscle Cell Migration In Vitro
K. Nakamura, J. Wakamatsu, A. Hattori, T. Nishimura, MOLECULAR BIOLOGY OF THE CELL, 17, 2006年
AMER SOC CELL BIOLOGY, 英語, 研究発表ペーパー・要旨(国際会議) - 亜臨界処理による豚血液利用の実証試験
沖浦智紀, 飯倉一雄, 大石泰之, 森松文毅, 若松純一, 西邑隆徳, 服部昭仁, 山田良司, 日本食肉研究会総会提出議案及び大会講演要旨, 47th, 1, 32-36, 163, 2006年
日本食肉研究会, 日本語 - 51st International Congress of Meat Science and Technology(第51回国際食肉科学技術会議)に参加して
坂田亮一, 島田謙一郎, 西海理之, 若松純一, 食肉の科学, 46, 2, 191, 214, 2005年12月
日本語, 記事・総説・解説・論説等(学術雑誌) - パルマハム中の亜鉛プロトポルフィリンIX(ZPP)はヘム以外から新たに生成される
奥井潤, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 105th, 104, 2005年08月25日
日本語 - 豚骨格筋における死後硬直時のサルコメア長の違いに関する研究
中村幸信, 若松純一, 西邑隆徳, 服部昭仁, 食肉の科学, 46, 1, 140-142, 2005年06月
日本語, 研究発表ペーパー・要旨(全国大会,その他学術会議) - 食肉の物理化学的特性に及ぼす通電解凍の影響
蒋士竜, 若松純一, 西邑隆徳, 樋元淳一, 川村周三, 伊藤和彦, 服部昭仁, 日本畜産学会大会講演要旨, 104th, 166, 2005年03月20日
日本語 - デコリンはミオスタチンを捕捉しその活性を制御する
三浦孝之, RAVI KAMBADUR, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 104th, 212, 2005年03月20日
日本語 - デコリンはミオスタチンの増殖抑制活性を制御している
岸岡康博, RAVI KAMBADUR, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 104th, 212, 2005年03月20日
日本語 - 骨格筋の発達に伴うミオスタチンおよびデコリンの発現と局在
大山弘平, RAVI KAMBADUR, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 104th, 212, 2005年03月20日
日本語 - パルマハムにおける亜鉛プロトポルフィリンIX(ZPP)の局在とフェロケラターゼの関与について
池田有希, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 104th, 167, 2005年03月20日
日本語 - 豚骨格筋における死後硬直時のサルコメア長の違いに関する研究
中村幸信, 若松純一, 西邑隆徳, 服部昭仁, 日本食肉研究会総会提出議案及び大会講演要旨, 46th, 1, 40-42, 142, 2005年
日本食肉研究会, 日本語 - 研究発表 豚骨格筋における死後硬直時のサルコメア長の違いに関する研究 (研究会発表要旨 第46回日本食肉研究会大会発表要旨)
中村 幸信, 若松 純一, 西邑 隆徳, 食肉の科学, 46, 1, 140, 142, 2005年
日本食肉研究会, 日本語 - Determination of zinc protoporphyrin IX in a new model system without addition of myoglobin
51st International Congress of Meat Science and Technology (CD-ROM), Th24, 2005年
英語, 研究発表ペーパー・要旨(国際会議) - Cloning and expression of DNA fragment encoding paratropomyosin binding connectin/titin domains at the A-I junction of a sarcomere
51st International Congress of Meat Science and Technology (CD-ROM), Th74, 2005年
英語, 研究発表ペーパー・要旨(国際会議) - Localization of zinc protoporphyrin IX (ZPP) in Parma ham
WAKAMATSU J., 51st International Congress of Meat Science and Technology (CD-ROM), F26, 2005年
英語, 研究発表ペーパー・要旨(国際会議) - Expression and localization of decorin and myostatin during development of rat skeletal muscle
K Oyama, J Wakamatsu, A Hattori, R Kambadur, M Sharma, T Nishimura, MOLECULAR BIOLOGY OF THE CELL, 15, 303A, 303A, 2004年11月
AMER SOC CELL BIOLOGY, 英語, 研究発表ペーパー・要旨(国際会議) - Decorin rescues myostatin-induced inhibitory action to myogenic cell growth
Y Kishioka, T Miura, J Wakamatsu, A Hattori, R Kambadur, M Thomas, M Sharma, T Nishimura, MOLECULAR BIOLOGY OF THE CELL, 15, 303A, 303A, 2004年11月
AMER SOC CELL BIOLOGY, 英語, 研究発表ペーパー・要旨(国際会議) - Decorin traps myostatin and regulates its activity to myogenic cells in vitro
T Miura, Y Kishioka, J Wakamatsu, A Hattori, R Kambadur, A Hennebry, M Sharma, T Nishimura, MOLECULAR BIOLOGY OF THE CELL, 15, 303A, 303A, 2004年11月
AMER SOC CELL BIOLOGY, 英語, 研究発表ペーパー・要旨(国際会議) - 通電解凍した食肉の品質について
蒋士竜, 若松純一, 西邑隆徳, 樋元淳一, 川村周三, 伊藤和彦, 井上貞仁, 熊林義晃, 服部昭仁, 日本畜産学会大会講演要旨, 103rd, 187, 2004年03月20日
日本語 - 骨格筋におけるミオスタチンおよびSmall leucine‐rich proteoglycansの局在
大山弘平, 若松純一, RAVI K, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 103rd, 151, 2004年03月20日
日本語 - 伝統的乾塩漬食肉製品の色素形成機構に関する研究 2.食肉内在酵素の関与とその存在画分について
池田有希, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 103rd, 164, 2004年03月20日
日本語 - 伝統的乾塩漬食肉製品の色素形成機構に関する研究 1.食肉内在成分の関与について
奥井潤, 池田有希, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 103rd, 163, 2004年03月20日
日本語 - Behavior of chicken breast muscle myosin solubilized in neutral and low ionic strength solutions
50th International Congress of Meat Science and Technology (CD-ROM), 1.23., 2004年
英語, 研究発表ペーパー・要旨(国際会議) - Zinc protoporphyrin IX contributes to the bright red color in Parma ham
50th International Congress of Meat Science and Technology (CD-ROM), 1.59., 2004年
英語, 研究発表ペーパー・要旨(国際会議) - 中性低イオン強度下のミオシンにおよぼす超音波処理の影響
伊藤友季子, 土岐真治, 大森丘, 若松純一, 西邑隆徳, 服部昭仁, 日本畜産学会大会講演要旨, 101st, 226, 2003年03月20日
日本語 - 通電加熱による冷凍食品の解凍法に関する研究
蒋士竜, 若松純一, 西邑隆徳, 樋元淳一, 川村周三, 伊藤和彦, 服部昭仁, 日本畜産学会大会講演要旨, 101st, 153, 2003年03月20日
日本語 - 高コレステロール食を与えたラットの脂質代謝およびそのmRNAへ及ぼすカルニチンの影響について
島田謙一郎, 福島道広, 若松純一, 食肉に関する助成研究調査成果報告書, 20, 255-261, 2002年12月
日本語 - アルカリ処理鶏肉を使用した含気食肉製品の開発
三浦孝之, 若松純一, 沼田正寛, 岩崎智仁, 山本克博, 西邑隆徳, 服部昭仁, 北海道畜産学会大会講演要旨, 58th, 30, 2002年08月20日
日本語 - 新たな食肉製品創出のための食肉タンパク質水可溶化技術の開発
土岐真治, 伊藤友季子, 大森丘, 井手弘, 若松純一, 西邑隆徳, 服部昭仁, 北海道畜産学会大会講演要旨, 58th, 30, 2002年08月20日
日本語 - 高脂肪食投与下におけるL‐カルニチンの脂質代謝に及ぼす影響
島田謙一郎, 今野宗, 渡辺荘子, 福島道広, 関川三男, 中野益男, 三上正幸, 若松純一, 日本栄養・食糧学会総会講演要旨集, 56th, 253, 2002年06月20日
日本語 - 動物骨由来ペプチドのアンギオテンシンI変換酵素阻害効果
六車三治男, 上島良介, 河原聡, 山内清, 若松純一, 沼田正寛, 中村豊郎, 日本畜産学会大会講演要旨, 100th, 162, 2002年03月20日
日本語 - 新規食肉加工品素材としてのアルカリ処理鶏肉
三浦孝之, 永田悠子, 岩崎智仁, 山本克博, 若松純一, 沼田正寛, 中村豊郎, 日本畜産学会大会講演要旨, 100th, 166, 2002年03月20日
日本語 - L‐カルニチンが培養心筋細胞の脂肪酸取り込みおよびATP産生に及ぼす影響
西邑隆徳, 若松純一, 辰巳隆一, 服部昭仁, 食肉に関する助成研究調査成果報告書, 19, 228-232, 2001年12月
日本語 - カルニチン投与によるラットの脂質代謝およびそのmRNAへの影響について
福島道広, 島田謙一郎, 中野益男, 若松純一, 食肉に関する助成研究調査成果報告書, 19, 233-239, 2001年12月
日本語 - 動物骨抽出成分による血圧上昇抑制活性の発現
六車三治男, 上島良介, 河原聡, 山内清, 若松純一, 沼田正寛, 中村豊郎, 日本畜産学会大会講演要旨, 98th, 169, 2001年03月20日
日本語 - 維持透析患者における血清L‐カルニチン濃度と心機能およびQOLの検討 多施設共同研究 第1報
松上桂子, 石塚史乃, 中村修, 須藤祐司, 永野正史, 斎藤肇, 杉本徳一郎, 正木一伸, 若松純一, 日本透析医学会雑誌, 33, Supplement 1, 850, 2000年05月25日
日本語 - 透析食におけるL‐カルニチン含有量と素材の選択および調理方法の検討
久保之理子, 萩原純子, 斎藤肇, 永野正史, 若松純一, 日本透析医学会雑誌, 33, Supplement 1, 663, 2000年05月25日
日本語 - 生理活性物質の新傾向 I 畜産物由来の生理活性物質とその効果
若松純一, 本田和久, ジャパンフードサイエンス, 39, 1, 52-59, 59, 2000年01月
日本食品出版, 日本語, 記事・総説・解説・論説等(商業誌、新聞、ウェブメディア) - Cooking Loss of L-Carnitine from Beef
Proc. 45th Int. Cogr. Meat Sci. Technol., 2, 738, 739, 1999年
英語, 研究発表ペーパー・要旨(国際会議) - 注目のダイエット・スポーツ栄養素材 L‐カルニチンの機能性について
若松純一, 食品と開発, 33, 10, 43-46, 46, 1998年10月
CMPジャパン, 日本語, 記事・総説・解説・論説等(商業誌、新聞、ウェブメディア) - 牛肉由来L‐カルニチンのダイエット効果について
若松純一, New Food Industry, 40, 9, 1-5, 5, 1998年09月
食品資材研究会, 日本語, 記事・総説・解説・論説等(商業誌、新聞、ウェブメディア) - L-カルニチン含有食品素材「カルニッチ」 (特集:今後の活用が期待される食品新素材-2-)
若松 純一, 食品工業, 40, 24, 42, 47, 1997年12月
光琳, 日本語, 記事・総説・解説・論説等(商業誌、新聞、ウェブメディア) - 第42回国際食肉科学技術会議に出席して
沖谷 明紘, 西邑 隆徳, 西村 敏英, 若松 純一, 渡辺 彰, 食肉の科学, 38, 1, 69, 86, 1997年06月
日本食肉研究会, 日本語, 記事・総説・解説・論説等(国際会議プロシーディングズ) - 肉・肉製品
若松 純一, 臨床スポーツ医学 = The journal of clinical sports medicine, 13, 0, 351, 352, 1996年11月
日本語, 記事・総説・解説・論説等(商業誌、新聞、ウェブメディア) - 牛肉の抗疲労効果について
若松 純一, 長尾 哲二, 沼田 正寛, 中村 豊郎, 藤巻 正生, 食肉の科学, 37, 1, 134, 137, 1996年06月
日本食肉研究会, 日本語, 研究発表ペーパー・要旨(全国大会,その他学術会議) - Anti-fatigue Effects of Beef
Proc. 42nd Int. Cogr. Meat Sci. Technol., 40, 41, 1996年
英語, 研究発表ペーパー・要旨(国際会議) - 鶏はいの骨格筋に存在する新タンパク質,650kDaタンパク質の単離・精製とその性質
若松純一, 桑原京子, 服部昭仁, 食肉に関する助成研究調査成果報告書, 12(1993), 273-278, 1994年12月
日本語
書籍等出版物
講演・口頭発表等
- 肉のかたさを科学的に考えてみよう!
若松 純一
北海道食文化研究会第7回セミナー, 2018年06月14日, 日本語, 公開講演,セミナー,チュートリアル,講習,講義等
[招待講演], [国内会議] - 肉を食べたい! 微生物の戦いと葛藤
若松 純一
北海道食文化研究会第4回セミナー, 2017年06月08日, 日本語, シンポジウム・ワークショップパネル(指名)
[招待講演], [国内会議] - 体を温める食肉、冷やす食肉
若松 純一
第71回日本栄養・食糧学会大会 シンポジウム「 Meet the World of Meat! ~食肉のおいしさ・機能性・遺伝子制御の新展開~ 」, 2017年05月20日, 日本語, シンポジウム・ワークショップパネル(指名)
[招待講演], [国内会議] - 肉の発酵と熟成
若松 純一
第二回「食と健康の達人」拠点シンポジウム北海道の発酵~ワインと食~, 2016年08月20日, 日本語, 公開講演,セミナー,チュートリアル,講習,講義等
[招待講演], [国内会議]
所属学協会
共同研究・競争的資金等の研究課題
- シカ肉の科学的根拠に基づく品質基準と適切な取り扱い手法の確立
科学研究費助成事業
2022年04月01日 - 2025年03月31日
松浦 友紀子, 若松 純一, 中下 留美子, 亀井 利活
日本学術振興会, 基盤研究(C), 国立研究開発法人森林研究・整備機構, 22K05962 - 食肉・食肉製品中の亜鉛プロトポルフィリンIX形成におけるフェロケラターぜの作用機序の解明
研究助成
2023年04月 - 2024年03月
公益財団法人 伊藤記念財団, 研究代表者, 19 - ZnPP形成能の高い微生物を用いた食肉製品の色調改善技術開発
科学研究費助成事業
2020年04月01日 - 2023年03月31日
若松 純一
本研究で見出した、好気的条件下でも亜鉛プロトポルフィリンIX(ZnPP )を形成できる乳酸菌(LLC、略称とする)は、これまで改善できなかった表層部を含む発酵ドライソーセージ全体の色調を改善できることを示した。本年度は、実用化に向けた各種要因の調査、並びにLLCによる好気的条件下での形成機構を検討した。
低温での乾燥を行わず高温熟成を行ったドライソーセージでは、LLC添加区では無添加区に比べてZnPP量が増加し、最終製品の断面全体は鮮やかな色調となった。ZnPP量は初めの1週間で最も上昇し、その後はほぼ一定の値となった。同様に、前駆物質であるプロトポルフィリンIX(PPIX)量の上昇も見られた。一方で、低温熟成で製造を行った場合、無添加区とLLC添加区間でZnPP自家蛍光強度および色調に差はなく、乳酸菌による効果は見られなかった。表面のネトや雑菌の増殖を防止する目的で予め低温乾燥を7日間行ったところ、高温熟成を経ても断面全体もしくは外側部分でZnPP形成が促進されなかった。以上より、乳酸菌LLC発酵ドライソーセージにおいてZnPP形成促進による色調改善を行うためには熟成初期の温度と菌の状態が重要であることが示唆された。
LLCの好気的条件下でのZnPP形成機構については、ヘムから脱鉄して亜鉛を挿入するという経路が同じあったことと、肉中の関与する酵素によって阻害されること、嫌気的条件下ではより一層産生することから、LLCは肉中の好気的ではZnPP形成できないプロセスをバイパス的に補うことにより、ZnPPを酸素の影響に関係なくZnPPを産生させることが示唆された。さらに、菌体だけではなく培養した後の培地成分にも形成促進効果が見られ、菌体外に分泌した酵素だけでなく、代謝産物にも形成促進効果がある可能性が示された。
日本学術振興会, 基盤研究(C), 北海道大学, 20K06356 - 食用ブドウ球菌によるZnPP形成と食肉製品の色調改善効果に関する研究
研究助成
2022年04月 - 2023年03月
公益財団法人 伊藤記念財団, 研究代表者, 54 - 乾塩漬ハム中の亜鉛プロトポルフィリンIXの形成様相と存在形態に関する研究(III)
研究助成
2021年04月 - 2022年03月
公益財団法人 伊藤記念財団, 研究代表者, 16 - 乾塩漬ハム中の亜鉛プロトポルフィリンIXの形成様相と存在形態に関する研究(II)
研究助成
2020年04月 - 2021年03月
公益財団法人 伊藤記念財団, 研究代表者, 148 - 乾塩漬ハム中の亜鉛プロトポルフィリンIXの形成様相と存在形態に関する研究
研究助成
2019年04月 - 2020年03月
公益財団法人 伊藤記念財団, 研究代表者, 33 - 食肉タンパク質の抗肥満および脂質代謝促進効果に関する研究(II)
平成30年度研究助成
2018年04月 - 2019年03月
若松 純一
公益財団法人伊藤記念財団, 研究代表者, 競争的資金 - 褐色脂肪組織の活性化に寄与する鶏肉・羊肉ペプチドの探索とその機構の解明
科学研究費補助金(基盤研究(C))
2016年04月 - 2019年03月
若松 純一
in vivoにおける検討では、鶏肉の人工消化ペプチドでは親水性画分に食後の体温上昇作用があることが示唆された。鶏肉ペプチドの部位間での検討では、部位の影響があることが示された。また、食肉由来の消化・吸収ペプチドは畜種間や部位間でわずかに違いがあることから、生成される微量の特異的なペプチドが効果をもたらしている可能性が示された。一方、肝細胞を用いて人工消化ペプチドをin vitroで評価する系では、これまでのin vivoでの結果と逆の結果が得られたことから、食肉中の消化ペプチドは吸収して直接肝臓に作用して体温上昇をもたらすのではないことが示唆された。
文部科学省, 基盤研究(C), 北海道大学, 研究代表者, 競争的資金, 16K08002 - 食肉タンパク質の抗肥満および脂質代謝促進効果に関する研究
平成29年度研究助成
2017年04月 - 2018年03月
若松 純一
公益財団法人伊藤記念財団, 研究代表者, 競争的資金 - ZnPP形成能を有する微生物の探索と応用
平成27年度研究助成
2015年06月 - 2016年03月
若松 純一
伊藤記念財団, 研究代表者, 競争的資金 - 国産赤身型牛肉である乳用種牛肉の輸入牛肉に対する差別化技術の開発
14. 平成25年度農林水産業・食品産業科学技術研究推進事業「実用技術開発ステージ」
2013年 - 2015年
佐々木 啓介
農林水産省, 競争的資金 - 亜鉛化合物を用いた鶏肉の高生産・肉質改善法の確立
科学研究費補助金(基盤研究(C))
2012年 - 2014年
本田 和久, 若松 純一
本研究は、ブロイラーにおいて、食欲増進と肉色改善の両効果を期待できる亜鉛に着目し、これらの効果を最も強力に発揮する亜鉛化合物の選定とその最適給与量の決定を行なうと共に、亜鉛化合物によるブロイラーの食欲増進と肉色改善の両分子機構を解明して、ブロイラーの産肉量増加及び肉質向上の両者を同時に達成しようとするものである。平成25年度は、平成24年度に精製飼料に添加した際に産肉量を増加させ、肉色を有意に改善したペプチド亜鉛を市販飼料に50 ppm添加し、1日齢のブロイラー(チャンキー、雄)に出荷日齢(49日齢)まで給与し、摂食量、体重、種々の臓器・組織(ムネ肉、もも、肝臓、腹腔内脂肪組織)の重量及び肉色に及ぼす影響について調べた。その結果、ペプチド亜鉛の市販飼料への添加は、調べたいずれの項目にも影響を及ぼさなかった。その為、添加量を200 ppmまで段階的に増加させ、3週間給与した際の効果を確認した。その結果、100 ppmのペプチド亜鉛の添加は、肝臓重量および腹腔内脂肪組織重量に影響を及ぼすことなくブロイラーの体重、肝臓、ムネ肉及びももの重量を増加させた。また、ムネ肉の黄色みを上昇させたが、亜鉛プロトポルフィリンIX含量には変化が認められなかった。これらの結果から、ペプチド亜鉛の添加による摂食量、産肉量及び肉色に及ぼす影響は、飼料組成により大きく影響を受けることが示唆された。
文部科学省, 基盤研究(C), 神戸大学, 連携研究者, 競争的資金, 24580389 - 発色剤無添加食肉製品の品質に及ぼす亜鉛プロトポルフィリンIXの影響
科学研究費補助金(基盤研究(C))
2011年 - 2013年
若松 純一
肉・食肉製品中のZnPP形成にはpHだけでなく、pHを調節する酸の種類によっても強く影響されることを明らかにし、検証した最適条件でサラミを作ると、発色剤を加えたものと同等の色調を示した。さらに、ZnPP形成を促す微生物の存在も明らかにし、色調改善効果が期待される。さらに、多くの種類の骨格筋でZnPP形成の至適pHを検証したところ、従来のpHよりも低いpHにもあり、遅筋型筋線維の割合と正に相関することが示された。一方、ZnPPの亜鉛補給効果を検証したけれども、残念ながら無機亜鉛と比べて高い効果は認められなかった。
文部科学省, 基盤研究(C), 北海道大学, 研究代表者, 競争的資金, 23580362 - 亜鉛プロトポルフィリンIX形成機構の解明とその応用
科学研究費補助金(基盤研究(C))
2008年 - 2010年
若松 純一, 服部 昭仁, 西邑 隆徳, 服部 昭仁
発色剤無添加食肉製品における亜鉛プロトポルフィリンIX(ZPP)形成機構の解明と、ZPPを利用して食肉製品の色調改善に応用することを目的とした。塩漬食肉製品でZPPが形成されない機構を明らかにした。豚肉での3成分以上がZPP形成に不可欠であること、パルマハム中に形成された水抽出可能なZPPは、ある解糖系酵素と結合していることを明らかにした。レバーを用いて食肉製品の色調改善を試みたところ、ZPPを多量に形成することができ、酸の種類によって非加熱食肉製品における形成能は異なり、色調の望ましい食肉製品の開発につながることが示唆された。
文部科学省, 基盤研究(C), 北海道大学, 研究代表者, 競争的資金, 20580288 - Production of additive-free meat products. Investigating into the mechanism leading to good colour dried pork meats without the use of nitrite and nitrate
The Co-operative Research Programme Fellowship Awards for 2009
2009年 - 2009年
若松 純一
Organization for Economic Co-operation and Development (OECD), 研究代表者, 競争的資金 - 食肉タンパク質のS-ニトロシル化と量的変化に及ぼす発色剤の影響について
平成19年度研究助成
2007年04月 - 2008年03月
若松 純一
財団法人伊藤記念財団, 研究代表者, 競争的資金 - 食肉中のエネルギー代謝促進物質の探索と実用化
地域イノベーション創出総合支援事業 平成20年度「シーズ発掘試験」A発掘型
2008年 - 2008年
若松 純一
我々はこれまでの研究から、鶏肉や羊肉の摂取により、体温を上昇させることを確認した。そこで本研究では、鶏肉および羊肉による体温上昇機構を明らかにすることと有効成分を特定することを目的とし、動物実験を行って血液生化学検査、各種プロテオーム解析等により検討する。これにより、鶏肉および羊肉の機能を科学的に解明し、「食」を通じた生活の質改善を図るとともに、必要に応じて有効成分を抽出・濃縮し、エネルギー代謝改善のサプリメントの開発につなげる。
独立行政法人科学技術振興機構, 北海道大学, 研究代表者, 競争的資金 - 発色剤無添加乾塩漬ハムの亜鉛プロトポルフィリンIX(ZPP)形成における海塩の役割について
平成18年度研究助成
2006年04月 - 2007年03月
若松 純一
財団法人ソルト・サイエンス研究財団, 研究代表者, 競争的資金 - 亜鉛プロトポルフィリンIX形成による食肉製品の色調改善法
「研究開発助成事業」若手研究補助金
2007年 - 2007年
若松 純一
ノーステック財団, 研究代表者, 競争的資金 - 伝統的乾塩漬食肉製品中のヘム色素の亜鉛置換に関する研究
科学研究費補助金(若手研究(B))
2004年 - 2006年
若松 純一
我々はこれまでに、亜鉛プロトポルフィリンIX(ZPP)はヘムの鉄と亜鉛に置換によるものではなく、別に形成されたプロトポルフィリンIX(PPIX)に亜鉛を挿入することにより形成されることを明らかにした。パルマハムなどの伝統的乾塩漬食肉製品ではZPPは水で抽出できるが、一般に試薬などのZPPは水に溶解しないことからも、ZPPはミオグロビン(食肉中の主要なヘムタンパク質)以外のものと結合して存在していると考えられる。そこで、パルマハムの水抽出物から硫安分画、イオン交換クロマトグラフィならびに分取用等電点電気泳動により、ZPPを含む画分を精製し、SDS-PAGESより1本の主要なタンパク質のバンドが検出された。MALDI-TOF MSを用いて、このタンパク質は血清アルブミンと同定された。免疫沈降法によりパルマハム水抽出物からアルブミンを精製して、75%アセトン抽出法によりZPPの存在が確認された。一方、水抽出できないZPPが残存していることなどから、ZPPと結合しているタンパク質はアルブミン以外にも存在していると考えられる。亜硝酸塩などの発色剤を添加した食肉製品ではZPPはほとんど見られないことが知られている。この原因を解明するために、モデル実験を用いて検討したところ、亜硝酸塩の酸化作用が原因ではなく、一酸化窒素がZPPならびにその前駆物質であるPPIXの形成を阻害することにより、結...
文部科学省, 若手研究(B), 北海道大学, 研究代表者, 競争的資金, 16780184 - 亜臨界水・水熱反応を用いた食肉資源のネオプロセシングに関する基礎的研究
科学研究費補助金(萌芽研究)
2004年 - 2005年
西邑 隆徳, 服部 昭仁, 若松 純一
家畜のと畜解体工程および食肉加工工程で生じる屑肉などはテーブルミートとしては利用できないが、良質なタンパク質が豊富に含まれており、これらのタンパク質の新たな利活用が求められている。近年、「水」を反応場としてタンパク質などの高分子を分解する亜臨界水・水熱反応が着目されており、本研究では、1.亜臨界水・水熱反応の諸条件(温度、時間)が食肉タンパク質の分解様相に及ぼす影響を明らかにするとともに、2.亜臨界水・水熱反応生成物の生理活性を調べることによって、亜臨界水・水熱反応を食肉タンパク質資源の利活用技術として応用するための基礎的データを得ることを自的とした。先ず、食肉タンパク質に対する適正な亜臨界水・水熱反応条件の概略を把握することを目的に、鶏筋肉、鶏筋原線維、鶏ミオシンおよびコラーゲンを試料として用い、亜臨界水・水熱反応条件がタンパク質分解に及ぼす影響を検討した。その結果、(1)250℃以上の亜臨界水処理では遊離してきたアミノ酸の分解が促進されること、(2)亜臨界水・水熱反応温度の上昇に伴ってアンモニア生成量が増加すること、(3)亜臨界水・水熱反応によって生成されたペプチドの大きさ(分子量)は処理温度の上昇に伴って低下すること、(4)生成されたペプチドのACE阻害活性は鶏ミオシンやコラーゲンでは亜臨界水・水熱反応温度の上昇に伴って顕著に低下した。以上の結果から、食肉タンパク質への...
文部科学省, 萌芽研究, 北海道大学, 連携研究者, 競争的資金, 16658101 - 家畜骨格筋量制御因子・ミオスタチン活性の細胞外マトリックスを介した調節機構解明
科学研究費補助金(基盤研究(B))
2002年 - 2004年
西邑 隆徳, 森 匡, 服部 昭仁, 若松 純一
活性型ミオスタチンと相互作用する細胞外マトリックス成分を表面プラズモン共鳴法による分子間相互作用解析装置を用いて探索した結果、デコリン、フィブロモデュリン、ヘパラン硫酸プロテオグリカン、ラミニンおよびフィブロネクチンがミオスタチンと亜鉛イオン存在下且つ中性pH域で相互作用することを明らかにした。反応速度論的解析を行った結果、解離定数はデコリン、ヘパラン硫酸プロテオグリカン、ラミニンおよびフィブロネクチンで10^<-8>M、フィブロモデュリンで10^<-10>Mであった。また、デコリンからグリコサミノグリカン鎖を除去したコアタンパク質についてもミオスタチンとの相互作用が認められ、その解離定数、結合速度定数および解離速度定数はグリコサミノグリカン鎖が結合したデコリンとほとんど同じであった。以上の結果から、ミオスタチンはコアタンパク質を介してデコリンと結合していることが示唆された。次に、細胞外マトリックス成分がミオスタチンの筋細胞増殖阻害活性に及ぼす影響についてC2C12筋細胞を用いて検討した。ミオスタチンと相互作用を示した細胞外マトリックス成分をミオスタチンと一緒に亜鉛イオンを含む培地に添加して筋細胞の増殖を調べた結果、いずれの細胞外マトリックス成分を添加してもミオスタチンによる筋細胞増殖阻害作用を抑制することはできなかった。この実験系では、細胞外マトリックス成分は遊離の状態で培...
文部科学省, 基盤研究(B), 北海道大学, 連携研究者, 競争的資金, 14360156 - 筋原線維タンパク質の水溶化機構に関する研究
科学研究費補助金(基盤研究(B))
2001年 - 2003年
服部 昭仁, 辰巳 隆一, 西邑 隆徳, 若松 純一
筋原線維タンパク質の水溶化には、筋原線維タンパク質の50%以上を占めるミオシンの溶解が前提となる。本研究では、筋原線維タンパク質の水溶化の機構解明を目的として、ミオシンの低イオン強度下における挙動を追究した。その結果、中性低イオン強度下においてミオシンが溶解することを明らかにし、さらに、ミオシンの中性低イオン強度溶液に対する溶解性の変化とその際のミオシン分子の存在様式と形態変化を追究した。ミオシンの低イオン強度下での溶解にはL-Hisの存在と中性pHであることが重要であり、超音波処理は、必須の工程でなかった。中性低イオン強度溶液への溶解度はL-His濃度に依存して変化した。生理的条件下に戻すと凝集体を形成したため、中性低イオン強度下におけるミオシンの溶解性は可逆的であることを明らかにした。ヒスチジン存在下の中性低イオン強度溶液におけるミオシンは、単量体と微細なフィラメントによるネットワークの二つの形態で存在した。単量体ミオシンは高イオン強度における場合に比べて尾部長が長く、生理的条件や高イオン強度下における性質とは異なる特性を有することを示唆した。従って、この特性がミオシンを低イオン強度溶液に溶解させる要因になっていると結論した。本研究で明らかになったミオシンの特性を利用することにより、食肉製品の品質特性の発現機構解明や新規食肉製品の開発の可能性に明るい展望を認めることができた。
文部科学省, 基盤研究(B), 北海道大学, 連携研究者, 競争的資金, 13460115
産業財産権
- 乳酸菌を含有する亜鉛プロトポルフィリンIX形成剤、並びにこれを用いた加工食品の色調改善方法及び製造方法
特許権, 若松 純一, ムド カウサー ウル アラム, 早川 徹, 玖村 朗人, 国立大学法人北海道大学
特願2020-131367, 2020年08月03日
特開2022-028150, 2022年02月16日
特許第7190750号, 2022年12月08日
202203008675930669 - 乳酸菌を含有する亜鉛プロトポルフィリンIX形成剤、並びにこれを用いた加工食品の色調改善方法及び製造方法
特許権, 若松 純一, ムド カウサー ウル アラム, 早川 徹, 玖村 朗人, 国立大学法人北海道大学
特願2020-131367, 2020年08月03日
特開2022-028150, 2022年02月16日
202203017700400954 - 食肉・食肉加工品退色防止方法
特許権, 三浦 孝之, 山本 克博, 岩崎 智仁, 若松 純一, 賀来 由夏, 沼田 正寛, 山本 克博, 伊藤ハム株式会社
特願2001-208699, 2001年07月10日
特開2003-018976, 2003年01月21日
特許第4416356号, 2009年12月04日
2009年12月04日
200903049166217770 - 天然赤色色素及び当該色素を含む食品並びに食品素材
特許権, 沼田 正寛, 若松 純一, 伊藤ハム株式会社
特願2003-015807, 2003年01月24日
特開2006-056908, 2006年03月02日
特許第3949588号, 2007年04月27日
2007年04月27日
200903013836279972 - 色調を改善した食肉製品の製造方法
特許権, 若松 純一, 服部 昭仁, 西邑 隆徳, 国立大学法人 北海道大学
特願2005-078332, 2005年03月18日
特開2006-254818, 2006年09月28日
200903065416657696 - ヘム色素による水溶性の天然着色料及びその製造方法
特許権, 若松 純一, 沼田 正寛, 伊藤ハム株式会社
特願平7-189771, 1995年07月03日
特開平9-012912, 1997年01月14日
特許第3856398号, 2006年09月22日
2006年09月22日
200903031760341582 - 天然赤色色素及び当該色素を含む食品並びに食品素材
特許権, 沼田 正寛, 若松 純一, 伊藤ハム株式会社
特願2003-015807, 2003年01月24日
特開2006-056908, 2006年03月02日
200903013836279972 - オリゴペプチド製造方法及び装置
特許権, 西邑 隆徳, 服部 昭仁, 若松 純一, 竹脇 幸治, 森 徹, 石川島播磨重工業株式会社
特願2004-211334, 2004年07月20日
特開2006-028117, 2006年02月02日
200903011531181120 - 食肉製品の色調改善方法
特許権, 若松 純一, 池田 有希, 奥井 潤, 西邑 隆徳, 服部 昭仁, 若松 純一
特願2003-331268, 2003年09月24日
特開2005-095037, 2005年04月14日
200903080512679500 - 脂質代謝改善剤及びそれを用いた食品
特許権, 若松 純一, 本田 和久, 沼田 正寛, 伊藤ハム株式会社
特願平8-241251, 1996年08月23日
特開平10-066515, 1998年03月10日
特許第3608884号, 2004年10月22日
2004年10月22日
200903072745106273 - 含気性食肉製品及びその製造方法
特許権, 若松 純一, 沼田 正寛, 中村 豊郎, 伊藤ハム株式会社
特願平7-173988, 1995年06月16日
特開平9-000207, 1997年01月07日
特許第3585062号, 2004年08月13日
2004年08月13日
200903008073658264 - 肥満改善及びダイエット食用素材並びにそれを用いたダイエット用食品
特許権, 若松 純一, 本田 和久, 沼田 正寛, 伊藤ハム株式会社
特願平8-241252, 1996年08月23日
特開平10-066542, 1998年03月10日
特許第3578566号, 2004年07月23日
2004年07月23日
200903033896953282 - 体力増強・疲労回復剤及びそれを用いた食品
特許権, 若松 純一, 本田 和久, 沼田 正寛, 伊藤ハム株式会社
特願平8-286193, 1996年10月08日
特開平10-113147, 1998年05月06日
特許第3563892号, 2004年06月11日
2004年06月11日
200903029264353215 - 新規ペプチド及びその塩
特許権, 六車 三治男, 上島 良介, 若松 純一, 沼田 正寛, 中村 豊郎, 伊藤ハム株式会社
特願2002-093867, 2002年03月29日
特開2003-286298, 2003年10月10日
200903018262435409 - 抗疲労効果を有する食肉製品
特許権, 沼田 正寛, 若松 純一, 伊藤ハム株式会社
特願2001-336131, 2001年11月01日
特開2003-135033, 2003年05月13日
200903099683761682 - 食肉・食肉加工品の物性改善方法
特許権, 三浦 孝之, 山本 克博, 岩崎 智仁, 若松 純一, 沼田 正寛, 山本 克博, 伊藤ハム株式会社
特願2001-274646, 2001年09月11日
特開2003-079342, 2003年03月18日
200903002505870482 - 食肉・食肉加工品退色防止方法
特許権, 三浦 孝之, 山本 克博, 岩崎 智仁, 若松 純一, 賀来 由夏, 沼田 正寛, 山本 克博, 伊藤ハム株式会社
特願2001-208699, 2001年07月10日
特開2003-018976, 2003年01月21日
200903049166217770 - 脂質代謝改善用素材及びそれを用いた食品
特許権, 若松 純一, 和田 佳子, 沼田 正寛, 伊藤ハム株式会社
特願平11-236353, 1999年08月24日
特開2001-057868, 2001年03月06日
200903003974535178 - 肥満改善及びダイエット食用素材並びにそれを用いたダイエット食品
特許権, 若松 純一, 和田 佳子, 沼田 正寛, 伊藤ハム株式会社
特願平11-236354, 1999年08月24日
特開2001-057869, 2001年03月06日
200903013986220496 - 体力増強・疲労回復用素材及びそれを用いた食品
特許権, 若松 純一, 和田 佳子, 沼田 正寛, 伊藤ハム株式会社
特願平11-226008, 1999年08月10日
特開2001-046021, 2001年02月20日
200903050553263770 - 畜産物由来の組合わせ健康食品
特許権, 若松 純一, 鈴木 美紀, 本田 和久, 沼田 正寛, 中村 豊郎, 伊藤ハム株式会社
特願平8-354077, 1996年12月18日
特開平10-174564, 1998年06月30日
200903069515351901 - 体力増強・疲労回復剤及びそれを用いた食品
特許権, 若松 純一, 本田 和久, 沼田 正寛, 伊藤ハム株式会社
特願平8-286193, 1996年10月08日
特開平10-113147, 1998年05月06日
200903029264353215 - 肥満改善及びダイエット食用素材並びにそれを用いたダイエット用食品
特許権, 若松 純一, 本田 和久, 沼田 正寛, 伊藤ハム株式会社
特願平8-241252, 1996年08月23日
特開平10-066542, 1998年03月10日
200903033896953282 - 脂質代謝改善剤及びそれを用いた食品
特許権, 若松 純一, 本田 和久, 沼田 正寛, 伊藤ハム株式会社
特願平8-241251, 1996年08月23日
特開平10-066515, 1998年03月10日
200903072745106273 - ヘム色素による水溶性の天然着色料及びその製造方法
特許権, 若松 純一, 沼田 正寛, 伊藤ハム株式会社
特願平7-189771, 1995年07月03日
特開平9-012912, 1997年01月14日
200903031760341582 - 含気性食肉製品及びその製造方法
特許権, 若松 純一, 沼田 正寛, 中村 豊郎, 伊藤ハム株式会社
特願平7-173988, 1995年06月16日
特開平9-000207, 1997年01月07日
200903008073658264 - 色調を改善した食肉製品の製造方法
特許権
2006-254818 - オリゴペプチド製造方法及び装置
特許権
2006-028117 - 食肉製品の色調改善方法
特許権
2005-095037 - 天然赤色色素及び当該色素を含む食品並びに食品素材
特許権
3949588