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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Scutellaria baicalensis Water Extract on Lipid Metabolism and Antioxidant Defense System in Rats Fed High Fat Diet

황금추출물이 고지방 식이를 급여한 흰쥐의 지질대사 및 항산화방어계에 미치는 영향

  • 윤혜진 (대구대학교 식품영양학과) ;
  • 박영숙 (대구대학교 식품영양학과)
  • Published : 2010.02.27
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Abstract

The objective of this study was to determine the effects of a Scutellaria baicalensis water extract (SDWE) on lipid levels, lipid peroxidation and antioxidant enzyme activities on rats fed a high fat diet for 6 weeks. Thirty-two male Sprague-Dawley rats (4-weeks-old) were randomly divided into four groups: normal diet and deionized water (ND), normal diet and Scutellaria baicalensis water extract (NDS), high fat diet and deionized water (HFD), high fat diet and Scutellaria baicalensis water extract (HFDS). The food intakes were significantly lower, but the food efficiency ratios were significantly higher in the high fat diet groups than those in other groups. The level of HDL-cholesterol and HDL-cholesterol/total cholesterol ratio in plasma were significantly higher and AI (atherogenic index) in HFDS group was significantly lower than that in HFD group. The level of triglyceride in plasma was significantly decreased in SDWE groups. The triglyceride of liver was significantly increased in the high fat diet groups and the total cholesterol of liver in the HFDS group was significantly lower than that in the HFD group. The plasma and liver concentrations of thiobarbituric acid reactive substances (TBARS) in the NDS group were significantly lower than those in the ND group. The total antioxidant status (TAS) in plasma was significantly increased in the HFDS group compared to the HFD group. The activities of SOD, catalase and GST were significantly increased in SDWE groups compared to ionized water groups. The activity of GSH-Px and the concentration of GSH in liver in the HFDS group were significantly higher than those in the HFD group. These results suggest that a supplement of SDWE on rats fed high fat diet reduce levels of lipid and lipid peroxidation in plasma and liver and improve the antioxidant defense systems.

황금열수추출물이 고지방 식이를 급여한 흰쥐의 체내 지질대사 및 항산화 체계에 미치는 영향을 알아보기 위해 6주간 사육하여, 지질 농도, 항산화능 및 항산화 효소 활성도를 측정하였다. 최종 체중과 체중증가량은 군 간에 유의적인 차이가 없었다. 식이섭취량은 정상식이군보다 고지방식이군에서 유의하게 낮았고, 식이효율은 고지방식이군에서 정상식이군에 비해 유의적으로 높았다. 혈장의 HDL-콜레스테롤은 고지방식이군에 비하여 고지방 황금열수추출물군이 유의적으로 증가하였다. 중성지방은 정상식이 및 고지방섭취 시 모두 황금열수추출물 첨가군이 황금열수추출물 무첨가군에 비해 유의적으로 증가하였다. 간의 총 지질은 군 간에 차이가 없었고, 총 콜레스테롤은 고지방 섭취 시 황금열수추출물 첨가로 유의하게 감소하였으며 중성지방 농도는 정상식이군에 비하여 고지방식이군에서 유의적으로 증가하였다. HDL-cholesterol/total cholesterol은 고지방식이군에 비하여 고지방식이 황금추출물군에서 유의적으로 증가하였고, 동맥경화지수는 유의적으로 감소하였다. 혈장과 간의 지질과산화물 농도는 정상식이 섭취 시 황금열수추출물 섭취로 유의하게 감소하였다. 혈장의 TAS(total antioxidant status) 값은 고지방 섭취로 감소되었으며, 황금열수추출물 섭취로 유의하게 증가되었다. 간의 SOD, catalase 및 glutathione S-transferase 활성도는 정상식이 및 고지방섭취 시 모두 황금열수추출물 첨가군이 황금열수추출물 무첨가군에 비해 유의적으로 증가하였고, glutathione peroxidase 활성도와 glutathione 함량은 고지방섭취 시 황금열수추출물 첨가로 유의하게 증가하였다. 이상의 결과에서 고지방식이를 공급하였을 때 황금추출물의 섭취는 혈장과 간의 총콜레스테롤과 중성지방의 농도는 낮추고, 혈장의 HDL-콜레스테롤 농도, 총 콜레스테롤에 대한 HDL-콜레스테롤비율은 높이고 동맥경화지수를 낮추어 고지혈증 예방 및 치료에 효과적으로 사용될 수 있을 것으로 보인다. 또한 항산화 효소활성을 증가시켜 혈장과 간의 지질과산화물 함량을 낮춤으로써 산화적 스트레스를 억제하는 항산화제의 작용이 가능함을 시사해주었다.

Keywords

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