Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antioxidative Activity of Pine (Pinus densiflora) Needle Extracts in Rats Fed High-Cholesterol Diet

고콜레스테롤 식이 섭취 흰쥐에 대한 적송잎 추출물의 항산화 효과

  • Published : 2009.04.30
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Abstract

This study was conducted to investigate the effects of pine (Pinus densiflora) needle extracts on hepatic antioxidative system in rats fed high-cholesterol diet. Eight-week old Sprague Dawley rats were divided into four groups; normal diet group (CON), 0.5% cholesterol diet group (0.5% CHOL), 0.5% cholesterol diet and pine needle extracts prepared by using hot water group (HOT water), and 0.5% cholesterol diet and pine needle extracts prepared by using sub-supercritical $CO_2$ group (Sub-supercritical). The serum ALP, AST, and ALT activities were increased by 0.5% cholesterol diet supplementation, but treatment with pine needle extracts showed decrease compared with 0.5% CHOL group. The SOD activity in liver at 0.5% cholesterol diet group was more decreased than control group while Sub-supercritical group had significantly higher SOD activity than 0.5% CHOL group. Moreover, groups with pine needle extracts supplementation had higher level of GPx in liver than 0.5% cholesterol diet group. These results suggest that pine needle extracts increased antioxidative activities.

본 연구는 선행연구에서 적송잎 열수추출물의 항산화 활성이 높았으며 아임계 추출물 중에 항산화 활성이 높은 proanthocyanidin 함량이 높은 것으로 나타났으므로, 이러한 in vitro 실험의 결과를 in vivo 실험을 통하여 입증하고자 하였다. 적송잎의 열수추출물과 아임계 추출물이 콜레스테롤 식이를 투여한 흰쥐의 체내 항산화능에 미치는 영향을 검토하기 위하여 혈청 중의 AST, ALT, ALP 및 간장중의 항산화 효소인 SOD, CAT, GPx의 활성을 측정하였다. 체중 증가량은 콜레스테롤 식이를 투여한 CHOL군이 일반 대조식이군인 CON군보다 유의적으로 증가하는 결과가 나타났다. 콜레스테롤 식이 투여 시 식이섭취량은 일반식이군에 비하여 감소하였으나 식이효율은 유의적으로 증가하였다(p<0.05). 적송잎 추출물을 투여하였을 경우 체중증가량은 감소하였으나 유의차가 없었으므로 적송잎 추출물이 콜레스테롤 식이로 인한 체중증가에는 별다른 영향을 주지 않는것으로 나타났다. 혈청 중의 ALT 및 AST 활성은 콜레스테롤 식이를 투여한 CHOL군이 CON군에 비하여 활성이 증가되었으나 적송잎 추출물의 투여로 인하여 감소하는 경향을 타나내었다. 특히 열수 추출물보다 아임계 추출물에서 AST의 활성은 유의적으로 낮게 나타났으며, ALT는 유의성은 없었으나 CHOL군보다 활성이 낮게 나타났다. 간 조직 중의 항산화 효소 결과에서 SOD 유사활성은 CHOL군에서 대조군에 비해 유의적으로 감소하였으나 적송잎 아임계추출물 투여에 의해 증가하는 결과가 나타났다. GPx활성은 CON군에 비해 CHOL군에서 유의적으로 감소하였으나 적송잎 추출물 투여에 의해 CHOL군에 비해 현저하게 높은 결과로 나타나, 콜레스테롤식이 투여로 인한 효소활성 저하가 적송잎에 의해 회복됨을 알 수 있었다. 이상의 결과, 고콜레스테롤 유발 흰쥐에게 적송잎 추출물의 급여는 체내 항산화효소의 활성에 영향을 미치는 것으로 나타나 적송잎 추출물이 체내 항산화능 개선에 효과가 있을 것으로 기대된다.

Keywords

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