Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Effects of Anabolic Steroids of Pork on Proliferation and Differentiation of Myogenic Satellite Cell

돼지 고기의 아나볼릭 스테로이드가 Myogenic Satellite Cell의 증식과 분화에 미치는 영향

  • Lee, Dong-Mok (School of Biotechnology, Yeungnam University and Bovine Genome Resources Bank) ;
  • Lee, Ki-Ho (Department of Biochemistry and Molecular Biology and Medical Sciences Research Institute, Eulji University) ;
  • Cheon, Yong-Pil (Department of Biology, Sungshin Women's University) ;
  • Chun, Tae-Hoon (School of Life Sciences and Biotechnology, Korea University) ;
  • Choi, In-Ho (School of Biotechnology, Yeungnam University and Bovine Genome Resources Bank)
  • 이동목 (영남대학교 생명공학부 및 소유전체연구소재은행) ;
  • 이기호 (을지대학교 생화학교실) ;
  • 전용필 (성신여자대학교 생물학과) ;
  • 전태훈 (고려대학교 생명과학대학) ;
  • 최인호 (영남대학교 생명공학부 및 소유전체연구소재은행)
  • Received : 2010.06.14
  • Accepted : 2010.09.02
  • Published : 2010.10.31
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Abstract

Sex steroids are known to be involved in skeletal muscle development (anabolic effect) and are frequently used in medicines. It has been known that pork contains a variety of steroids that are mainly synthesized in the gonads (testis and ovary). Thus, the present study was conducted to evaluate the effects of anabolic steroids of pork on the proliferation and differentiation of myogenic satellite cells (MSC). Three different methods (M1, M2, and M3) were developed for the isolation and purification of steroids from porcine tissues. Among three extraction methods that we developed, M3 was the best method with respect to the quantities of steroids and the induction of MSC proliferation. Hormonal analysis showed that the steroid hormone levels were the highest in muscle and fat of intact male than those of castrated males and females. In addition, the highest serum levels of nandrolone and testosterone were detected in intact males, whereas estrone and $17{\beta}$-estradiol levels were similar in the entire experimental serum samples. Expression of androgen receptor (AR), myoD, desmin, and myogenin in bovine muscle cells were significantly up-regulated by the treatment of steroid extracts. The highest increas of myogenin and AR mRNA abundance were observed in the MSCs treated with M3 extract (p<0.001). Altogether, the present research showed the positive effect of steroids on MSC proliferation and differentiation in vitro. These results would certainly imply a beneficial effect of pork consumption on human muscle development.

성호르몬은 근육의 발달(아나볼릭 효과)에 관여하는 것으로 잘 알려져 왔으며 인체의 치료제로 넓게 사용되고 있다. 돼지고기에는 주로 성선(정소와 난소)에서 생산되어 고기에 축적된 다양한 아나볼릭 효과를 나타내는 성호르몬이 많이 존재하는 것으로 알려져 있다. 따라서 본 연구는 돼지고기에 존재하는 아나볼릭 스테로이드를 추출하여 근육세포의 증식과 분화에 미치는 영향을 파악하고자 실시하였다. 본 연구에서 돼지의 각 조직으로부터 아나볼릭 스테로이드를 추출하는 3가지 방법(M1, M2, M3)을 개발하였다. 3가지 모든 추출방법에서 아나볼릭 스테로이드가 추출되었으며 특히 M3에서 조직 1g당 가장 많은 양을 획득할 수 있었다. M3를 이용하여 아나볼릭 스테로이드를 추출했을 때 돼지고기의 근육과 지방에서는 스테로이드 호르몬 양이 수컷에서 가장 높았고, 혈청에서는 nandrolone 과 testosterone의 양은 수컷에서 가장 높았으며, estrone와 $17{\beta}$-estradiol의 양은 비슷하였다. 근육세포 증식은 돼지 아나볼릭 스테로이드의 농도 의존적으로 촉진되었으며, M3에서 가장 빠르게 증식되었다. 근육세포의 분화는 추출된 아나볼릭 스테로이드 처리구가 대조구보다 더 효과적으로 분화가 잘 되는 것을 세포 모양과 유전자(AR, myoD, desmin, myogenin)를 통하여 확인할 수 있었다. 특히 M3에서 추출된 아나볼릭 스테로이드에서 myogenin과 AR 유전자가 유의적으로 높게 발현되었다(p<0.001). 전체적으로 돼지의 아나볼릭 스테로이드는 근육세포의 성장과 분화를 촉진하였다. 따라서 돼지고기에 있는 아나볼릭 스테로이드의 섭취를 통해 인체 근육의 성장과 발달에 긍정적 효과를 나타낼 수 있을 것으로 사료된다.

Keywords

References

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