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Effects of Namhae Specialized Crops Water Extract on Lipid Metabolism in Rats Fed a Cholesterol Diet

남해군 특용작물 열수 추출분말이 콜테스테롤 급이 흰쥐의 혈청 및 장기 중 지질성분에 미치는 영향

  • Published : 2011.10.31

Abstract

This study was performed to investigate the effect of water extracts from Namhae special crops (NSC) on improved serum lipid composition using rats fed a 1% cholesterol diet for 4 weeks. Male Wister rats (200-210 g) were divided into six groups: Normal cholesterol diet group (Normal), 1% cholesterol diet group (Control), 1% cholesterol and NSC water extract powder supplemented groups, including, turmeric (Tu-EP), cactus (Ba-EP), aloe vera (Al-EP) and asparagus (As-EP). No significant differences were observed for food intake or body weight gain between the control and experimental groups. However, food efficiency ratio (FER) was the lowest in the As-EP group. The serum levels of total cholesterol and triglycerides in the NSC water powder extract supplement groups were lower than those in the control group. The serum high density lipoprotein (HDL)-cholesterol content in the Tu-EP group was higher than that in the other experimental groups. Very low density lipoprotein (VLDL)-cholesterol content in the As-EP group was similar to that in normal group. Furthermore, the VLDL content in the Al-EP group was lower than that in the normal group. Serum antioxidant activity by TBARS level and DPPH radical scavenging were significantly higher in the Ba-EP group than that in the control group. Hepatic total cholesterol and lipid content in the Al-EP group decreased significantly compared to that in the control group. These results suggest that the NSC water extract may reduce serum cholesterol and prevent oxidative stress by stimulating antioxidative systems in rats fed a 1% cholesterol diet.

남해군의 특용작물인 울금, 백년초, 알로에 및 아스파라거스가 혈청 지질 개선에 미치는 영향을 비교 분석하고자 1%의 콜레스테롤 첨가식이로 유발된 고콜레스테롤혈증 흰쥐를 이용하여 정상군, 고콜레스테롤 투여군을 대조군으로 하고, 특용작물 열수추출물 동결건조한 분말 1% 첨가 급이군을 실험군으로 하여 4주간 급이 후 실험하였다. 식이 섭취량과 체중증가는 실험군에 따른 유의차는 없었으나, 식이효율은 울금 추출분말 1% 급이군이 유의적으로 낮았다. 혈당은 실험군이 대조군에 비해 6.18~23.44% 정도 감소하였으며, 혈중 총 지질은 백년초 추출분말을 1% 급이군에서 374.99${\pm}$1.54 mg/dL로 실험군중에 가장 낮은 함량이었다. 총 콜레스테롤은 알로에 추출분말 첨가 급이군에서 가장 낮은 함량이었으며, 이는 정상군과 유의차가 없었다. 혈중 중성지질의 함량 또한 대조구에 비해 특용작물 추출분말 첨가군에서 낮았는데 아스파라거스 추출분말 첨가 급이군에서 50.00${\pm}$6.29 mg/dL로 가장 낮은 함량이었다. HDL-콜레스테롤은 울금 추출분말 급이군이 32.55${\pm}$6.16 mg/dL로 여타 실험군에 비해 유의적으로 높았으며, 정상군과 유의차가 없었다. LDL-콜레스테롤은 알로에 추출분말 급이군이 대조군에 비해 약 44% 더 낮았으며, VLDL-콜레스테롤은 아스파라거스 급이군에서 유의적으로 낮아 7.77${\pm}$0.72 mg/dL로 정상군 보다 29%나 더 낮았다. AI와 CRF는 울금과 알로에 추출분말 첨가군이 가장 낮았으며, 혈중 TBARS 함량과 DPPH radical 소거능은 백년초 추출분말 급이군에서 가장 효과적이었다. 간장에 함유되어 있는 총 지질 및 콜레스테롤 함량은 알로에 추출분말 급이군에서 가장 낮아 각각 134.54${\pm}$5.62 mg/g과 12.25${\pm}$3.07 mg/g 이었으며, TBARS 함량도 알로에 추출분말 첨가군이 가장 낮았다.

Keywords

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