Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Supplement of Conjugated Linoleic Acid Increases Neutrophil Phagocytosis in Pigs

Conjugated Linoleic Acid를 급여한 돼지의 호중구 탐식능 증강

  • Sang-chul, Han (Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine and Research Institute of Veterinary Medicine) ;
  • Ji-houn, Kang (Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine and Research Institute of Veterinary Medicine) ;
  • Sung-mok, Son (Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine and Research Institute of Veterinary Medicine) ;
  • Chung-soo, Chung (Department of Animal Science, Chungbuk National University) ;
  • Chul-young, Lee (Department of International Livestock Industry, Chinju National University) ;
  • Mhan-pyo, Yang (Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine and Research Institute of Veterinary Medicine)
  • Published : 2003.12.01
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Abstract

To examine the in vivo immunostimulating effect of conjugated linoleic acid (CLA) in pigs, the change of peripheral blood cells and the phagocytic response of phagocytes were evaluated. Spayed male pigs, 80 kg of average body weight, fed a diet containing either 0.5% 10t-12c CLA or 0.5% CLA mixture (mostly 9c-11t CLA and 10t-12c CLA) for 4 weeks. The change of blood cell values (PCV, WBC, differential count of WBC) and the phagocytic activities of phagocytes were evaluated on week 0, 2, 4, and 5, respectively. There were no change in the PCV values regardless of CLA supplement. The number of WBC, especially neutrophils, in pigs fed a diet with CLA was significantly increased (p<0.05 to 0.01) when compared with control pigs fed a diet without CLA. The phagocytosis of peripheral blood mononuclear cell (MNC) and peripheral blood polymorphonuclear cells (PMN) were analyzed by a flow cytometry system. There was no change in the phagocytic activity of MNC and monocyte-rich cells regardless of CLA supplement. However, the phagocytic activity of PMN composed by approximately 95% neutrophils was remarkably increased (p < 0.05 to 0.01) on week 2, 4, and 5 as compared wth control pigs. These results suggested that supplement of CLA into pigs induces the increase of neutrophil number and the enhancement of neutrophil phagocytosis.

CLA를 급여시킨 돼지에 있어 말초 혈액 세포의 변화와 탐식세포의 탐식반응을 조사하였다. 100일령, 평균체 중 80kg인 거세 수퇘지에게 10t-l2c CLA와 CLA mixture를 각각 사료 중에 5% 첨가하여 총 4주간에 걸쳐 자유급여 시켰다. 급여 전 (0주), 급여 2주후, 4주후 그리고 급여 중지 후인 5주차에 각각 혈액세포 수치(PCV 백혈구수 및 백혈구 감별계산치)의 변화와 탐식세포의 탐식활성을 측정하였다. CLA의 급여 따른 PCV의 수치에 있어서는 아무런 변화가 없었다. 그러나 10t-l2c CLA 또는 CLA mixture가 함유된 사료를 급여한 돼지에 있어서 CLA를 급여하지 않은 돼지에 비해 백혈구수 특히 호중구 수가 현저히 증가하였다. 말초혈액 단핵구세포(mononuclear cells; MNC)와 다형핵백혈구(polymorphonuclear cells; PMN)의 탐식능를 유세포분석기로 분석한 결과, 10t-l2c CLA 또는 CLA mixture 급여와 상관없이 MNC와 단구세포들(monocyte-rich cells)의 탐식능에는 변화가 없었다. 그러나 PMN의 탐식 활성은 CLA 무급여 대조돼지들에 비해 CLA 급여군은 2주에서 5주차에 걸쳐 증가된 탐식능를 나타내었다. 이상의 결과로부터 돼지에 CLA 급여는 호중구수 증가와 호중구 탐식능 증가를 유도할 수 있음을 제시하였으며 향후 생체방어 증강을 위해 CLA를 임상적으로 투여할 수 있을 것으로 보인다.

Keywords

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