PENGHAMBATAN OKSIDASI LDL DAN AKUMULASI KOLESTEROL PADA MAKROFAG OLEH EKSTRAK TEMULAWAK (Curcuma xanthorriza Roxb) [The Inhibition of Low Density Lipoprotein Oxidation and Cholesterol Accumulation on the Macrophage by Temulawak Extract]

Coronary heart disease is caused among others by atherosclerosis, which is the result of oxidized low density lipoprotein (LDL) and cholesterol accumulation on macrophage, and which is inhibited by temulawak (Curcuma xanthorriza Roxb) extract. The objective of this study was to find out the kinds and consentration of temulawak extract which could inhibit LDL oxidation, and to find out the effect of temulawak extract on the accumulation of cholesterol on macrophage. Temulawak was extracted by water, ethanol, aceton and dichlorometane. Inhibition of LDL oxidation was found out by measuring the level of malonaldehyde content of oxidized LDL-CuSO4 which was supplemented with water extract, ethanol extract, aceton extract and dichlorometane extract. of temulawak at concentrations of 43 g, 430 g, and 4300 g per ml of LDL. The percentage of malonaldehyde reduction due to supplementation with water extract, ethanol extract, acetone extract and dichloromethane extract was 44.27; 47.68; 51.83 and 61.2 respectively. The inhibition of LDL oxidation by temulawak extract depends on its concentration. The percentage of malonaldehyde reduction due to supplementation with temulawak extract of 43 μg, 430 μg, and 4300 μg per ml of LDL was 43.63; 56.72; and 53.89.. Concentration of temulawak extract resulting in the highest inhibition of LDL oxidation was 430 μg/ml LDL. Temulawak extract tends to inhibit cholesterol accumulation on macrophage. There is a relationship between the inhibition of cholesterol accumulation on the macrophage and the inhibition of LDL oxidation by temulawak extract