Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Bilolgical Activities of Conjugated Linoleic Acid (CLA) and Animal Products

Conjugated Linoleic Acid (CLA)의 생리활성과 축산식품

  • Hur, S.J. (Division of Animal Science, College of Agriculture) ;
  • Lee, J.I. (Gyeongsang National University, Advanced Swine Research Institute) ;
  • Ha, Y.L. (Division of Agricultural Chemistry, College of Agriculture) ;
  • Park, G.B. (Division of Animal Science, College of Agriculture) ;
  • Joo, S.T. (Division of Animal Science, College of Agriculture)
  • Published : 2002.08.31
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Abstract

Conjugated linoleic acid(CLA) is a collective term for a group of positional (c8, c10; c9, c11; c10, c12, and c11, c13) and geometric(cis,cis; cis,trans; trans,cis; and trans,trans) isomers of octadecadienoic acid (linoleic acid) with conjugated double bond system. CLA has been shown to have a variety of biological effects. Major effects of CLA on health, such as anti-cancer, anti-oxidation, anti-atherosclerosis and improving immuno-responses, might be derived or partially derived from the alternated lipid metabolism after CLA feeding. Most of studies on the effect of CLA on fat metabolism are concentrated on rats, mice, pigs and other mammals. The CLA inhibited carcinogen-induced neoplasia in several animal models and inhibited the proliferation of human malignant melanoma, colorectal and breast cancer cells and CLA reduced the atherosclerosis. Several studies have determined the antioxidant property of CLA; however, the property still remains controversial. Some of the studies have shown that CLA acted as an antioxidant, whereas some other studies have demonstrated that CLA might be a prooxidant. Several studies suggested that CLA could reduce fat accumulation in mammals. CLA was suggested to promote muscle growth and reduce fat deposition in mouse, and improve feed efficiency in rats. CLA has been shown to inhibit the activity of stearoyl-CoA reductase. CLA also reduced the content of arachidonic acid. Since arachidonic acid, and eicosapentaenoic acid (EPA) and docosahexenoic acid (DHA) are synthesized by different pathways, reducing the synthesis of arachidonic acid may not mean reducing that of EPA and DHA. Many sutdies have been shown biological effects of CLA. Therefore, further research is needed to answer the following questions: 1) how to synthesize the new CLA by new methods, 2) why CLA has shown biological effects, 3) how to increase CLA effects in animal products.

이상의 연구 결과들을 요약해보면 CLA는 생체내외에서 다양한 생리활성 효과를 가지는 것을 알 수 있다. CLA의 주요 효과는 유방암, 췌장암, 피부암 및 대장암을 억제하는 효과, 동물체내에서의 면역력증강 효과, 동맥경화증에 대한 효과, 지방축적 억제효과, 체내 지방분해 촉진효과 및 식육에서의 항산화 효과와 육색안정 효과 등으로 요약된다. 그러므로 CLA는 건강보조식품으로 혹은 축산식품을 비롯한 다양한 식품의 기능성 첨가제로써의 충분한 가능성을 가지고 있는 것으로 사료된다. 그러나 이러한 CLA의 효과는 실험에 따라 다소간의 차이를 나타내고 또한 CLA의 생리활성 기작에 대한 정확한 이해가 부족한 실정이다. 따라서 향후 CLA와 관련하여 다음과 같은 연구가 필요할 것으로 사료된다. 1) 새로운 CLA 이성체의 발견 및 CLA 합성방법에 대한 연구 2) CLA가 가지는 각각의 생리활성 효과에 대한 정확한 기작을 밝히는 연구 3) CLA 이성체간의 생리활성 효과 차이에 대한 연구 4) CLA의 생리활성 효과를 극대화 할 수 있는 이성체간의 비율에 대한 연구 5) 기능성 식품첨가제로써의 CLA를 효과적으로 이용하는 방법 연구 6) CLA를 식용가축 및 축산물에 효과적으로 축적시키는 방법 연구 7) CLA를 이용한 육제품 및 유제품 개발 연구 8) 사람에 있어 CLA 효과에 대한 임상 연구.

Keywords

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