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Casein hydrolysate supplementation enhances training effects on mitochondrial enzyme activities in slow muscle fibers but not in fast fibers in mice (706.18)
Author(s) -
Matsunaga Yutaka,
Tamura Yuki,
Masuda Hiroyuki,
Takahashi Yumiko,
Hoshino Daisuke,
Saito Noriko,
Nakamura Hirohiko,
Takeda Yasuhiro,
Hatta Hideo
Publication year - 2014
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.28.1_supplement.706.18
Subject(s) - hydrolysate , casein , mitochondrial biogenesis , endurance training , citrate synthase , soleus muscle , medicine , endocrinology , ingestion , chemistry , enzyme , food science , biochemistry , mitochondrion , skeletal muscle , hydrolysis
Aims: The aim of this study was to determine whether ingestion of casein hydrolysate enhances training effects on mitochondrial biogenesis. Methods: Mice were randomly divided into three treatment groups: the control group (CON), the endurance training group (Tr), and the endurance training with casein hydrolysate group (CH+Tr). Mice were ingested either water or casein hydrolysate (0.2 mg/g BW, 7 times/week) and subjected to endurance training (20‐25 m/min×60 min, 5 times/week, for 6 weeks) 30 min after the supplementation. Muscular mitochondrial enzyme activities, citrate synthase (CS) and β‐hydroxyacyl‐CoA dehydrogenase (β‐HAD) were measured. Results: In plantaris muscle, CS activities in Tr and CH+Tr groups were significantly higher than that in CON group (p<0.01) without significant differences between Tr group and CH+Tr group. On the other hand, CS activity in CH+Tr group was significantly higher than those in CON and Tr groups in soleus muscle (p<0.05). Similarly, in cardiac muscle, CS activity in CH+Tr group was significantly higher than that in Tr group (p<0.01) and tended to be higher comparing to CON group (p=0.051). β‐HAD activity was also increased in CH+Tr group in soleus and cardiac muscles. Conclusion: Casein hydrolysate supplementation enhances training effects on mitochondrial enzyme activities in slow muscle fibers but not in fast fibers. Grant Funding Source : Morinaga Milk Industry Co., Ltd