Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Extracts of Housefly Maggot Reduces Blood Cholesterol in Hypercholesterolemic Rats

고콜레스테롤 랫드에서 파리유충 추출물의 혈액지질 감소기전

  • Park, Byung-Sung (Department of Animal Biotechnology, Kangwon National University) ;
  • Park, Sang-Oh (Institute of Animal Resources, Kangwon National University)
  • 박병성 (강원대학교 동물생명공학과) ;
  • 박상오 (강원대학교 동물자원공동연구소)
  • Received : 2014.02.20
  • Accepted : 2014.03.14
  • Published : 2014.03.30
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Abstract

The aim of this study was to evaluate the biological mechanism of orally administered ethanolic extract of fly maggot(EM) on hypocholesterolemic rats fed a high-cholesterol diet. Sprague Dawley male rats were divided into four groups (EM dose control=0, 5.0, 7.0, and 9.0 mg/100 g BW) and were treated for 6 weeks. EM groups revealed a significant reduction in serum triglyceride, total cholesterol, and LDL-C when compared with the control group(p<0.05). HMG-CoA reductase activity in EM groups were lower than those of the control group, but total sterol, neutral sterol, and bile acid excretion were increased in EM groups when compared with the control group(p<0.05). To identify the biological mechanism of EM towards the hypocholesterolemic effect, sterol response element binding proteins (SREBPs) and the peroxisome proliferator-activated receptors ($PPAR{\alpha}$ transcription system were determined in rats fed a high-cholesterol diet. It was discovered that EM suppress the expression of SREBP-$1{\alpha}$ and SREBP-2 mRNA in the liver tissues of high-cholesterol diet fed rats, while simultaneously increasing the expression of $PPAR{\alpha}$ mRNA(p<0.05). This finding indicates that EM may have hypocholesterolemic effects in rats fed a high-cholesterol diet, by regulating cholesterol metabolism-related biochemical parameters and SREBP-$1{\alpha}$ SREPB-2 and $PPAR{\alpha}$gene expression.

본 연구는 고콜레스테롤 식이를 섭취한 랫드에서 파리유충 에탄올추출물(Ethanolic extract of fly maggot, EM)의 경구투여가 혈액 지질감소에 미치는 영향을 조사하였다. Sprague-Dawley 수컷 랫드를 이용하여 4 처리구(EM 투여량; 대조군=0, 5.0, 7.0, 9.0 mg/100 g 체중)로 구분해서 6주 동안 진행하였다. EM 투여군은 대조군과 비교할 때 혈청 중성지방, 총콜레스테롤, LDL-C가 유의하게 낮았다(p<0.05). HMG-CoA reductase activity는 대조군과 비교할 때 EM 투여군에서 낮았으나 총스테롤, 중성스테롤 및 담즙산 배설량은 EM 투여군에서 유의하게 높았다(p<0.05). EM의 혈액 콜레스테롤 감소와 관련한 생물학적 작용기작을 규명하기 위해서 고콜레스테롤 식이를 섭취한 랫드에서 유도된 생체유전자 sterol response element binding proteins (SREBPs) 및 the peroxisome proliferator-activated receptors ($PPAR{\alpha}$) 발현을 측정하였다. EM은 고콜레스테롤 식이를 공급받은 랫드의 간에서 SREBP-$1{\alpha}$, SREBP-2 mRNA 발현을 억압함과 동시에 $PPAR{\alpha}$ mRNA 발현을 촉진시키는 것으로 나타났다(p<0.05). 본 연구의 결과는 파리유충 에탄올추출물이 고콜레스테롤 식이를 섭취한 랫드에서 지질대사와 관련한 생화학적 매개변수 및 유전자발현 조절을 통하여 혈액 콜레스테롤을 낮춘다는 새로운 사실을 발견하였다.

Keywords

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