Effects of Solvent Fractions of Korean Cabbage Kimchi on Antioxidative Enzyme Activities and Fatty Acid Composition of Phospholipid of Rabbit Fed 1% Cholesterol Diet

배추김치 용매획분이 고 콜레스테롤 식이를 섭취한 토끼의 항산화 효소계 및 인지질 지방산 조성에 미치는 영향

  • 김현주 (부산대학교 식품영양학과 및 김치연구소) ;
  • 권명자 (생명공학연구소) ;
  • 송영옥 (부산대학교 식품영양학과 및 김치연구소)
  • Published : 2000.10.01

Abstract

The antioxidant effects of dichloromethane, ethylacetate or water fraction of kimchi added to the 1% cholesterol diet were studied. Six New Zealand white rabbits in each group were fed either control diet (basal diet containing 1% cholesterol) or experimental diet containing dichloromethane (CH$_2$Cl$_2$), ethylacetate (EtOAc) or water ($H_2O$) fraction of kimchi in the control diet for 16 weeks. The amount of each solvent fraction of kimchi added to the experimental diet was equivalent to 5% of freeze-dried kimchi. Levels of hepatic lipid oxidation expressed as TBARS or peroxide value for the experimental groups were lower than that of control (p<0.05). Liver homogenated of the experimental group containing dichloromethane fraction of kimchi inhibited LDL oxidation in the presence of Cu++ by 46% (p<0.05). The activities of catalase, Glutathione peroxidase (GSH-Px), Cu, Zn-superoxide (Cu, Zn-SOD) and Mn-superoxide (Mn-SOD) of experimental groups were lower than those of control group. Low enzyme activities observed from the kimchi solvent fraction groups might be due to the level of lipid oxidation progressed less in these groups. The most significant antioxidant effects were observed from dichloromethane fraction of kimchi among the experimental groups. The major fatty acids of hepatic phospholipid of rabbit were C18:2 and C18:0. But the major fatty acid profile was changed into C16:0, C18:0, C18:1, and C18:2 when rabbit was fed 1% cholesterol diet for 16 weeks, and this profile was almost the same as in rabbit fed diet containing kimchi solvent fraction. The ratio for unsaturated fatty acid to saturated fatty acid decreased by cholesterol induced diet and it was not corrected by kimchi solvent fractions.

Keywords

References

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