Biomedical Science Letters (대한의생명과학회지)

The Korean Society for Biomedical Laboratory Sciences (대한의생명과학회)
권호 표지

Effects of Soybean Peptide Intake on Antioxidant Enzyme, Cortisol and Inflammatory Cytokines in High School Judo Athletes

  • Bae, Su-Jung (Department of Biomedical Laboratory Science, Daejeon University) ;
  • Lee, Da-Kyoung (Department of Biomedical Laboratory Science, Daejeon University) ;
  • Son, Chang-Seob (Department of Physical Education Graduate School, Soonchunhyang University) ;
  • Lee, Hye-Sook (Department of Beauty and Health care, Daejeon University) ;
  • Lee, Jang-Woon (Central Research Institute, Dr. Chung's Food Co. Ltd.) ;
  • Lee, Yoon-Bok (Central Research Institute, Dr. Chung's Food Co. Ltd.) ;
  • Yoo, Yung-Choon (Department of Microbiology, College of Medicine, Konyang University) ;
  • Park, Jin-Hong (Department of Emergency Medical Technology, Chung cheong University) ;
  • Hong, Seung-Bok (Department of Clinical Laboratory Science, Juseong University) ;
  • Hwang, Seock-Yeon (Department of Biomedical Laboratory Science, Daejeon University)
  • Received : 2011.08.04
  • Accepted : 2012.03.30
  • Published : 2012.03.31
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Abstract

The purpose of this study was to investigate the effect of soybean peptide on antioxidant enzymes, cortisol hormone and inflammatory cytokine levels. 19 high school male judo athletes participated in the experiments. They were randomly divided into two groups, one group took soybean peptide (S-peptide, n=10) 4 g a day for 4 weeks and the other group placebo (placebo group, n=9) for the same time. Blood samples were collected before intake, after 2 weeks intake and 4 weeks intake and these were analyzed for total antioxidant status (TAS), catalase (CAT), levels of cortisol hormone, tumor necrosis factor-alpha (TNF-${\alpha}$) and interleukin-6 (IL-6). As a result, the S-peptide group was significantly increased in TAS and CAT (P<0.05). The malondialdehyde (MDA) levels showed decrease after soybean peptide intake but there was no significant difference. In the levels of plasma cortisol which reflect stress status, there was significantly decreased in the S-peptide and placebo group after 4 weeks (P<0.05). There were significant decreases of TNF-${\alpha}$ and IL-6 after 4 weeks in S-peptide group (P<0.05). These results suggest that the intake of soybean peptide can activate antioxidant defenses and decrease exercise-induced oxidative stress.

Keywords

References

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