Abstract

Background: Atherosclerosis is a crucial element in the origination of coronary heart disease (CHD). Lipid aggregation inside the coronary arteries walls lead to the occurrence of hyperlipidemia. Aim: The research was conducted for assessing the lipid lowering effect of ethanol extract and chloroform fraction from Convolvulus pluricaulis Choisy. aerial parts in Triton induced hyperlipidemic rat model. Methodology: The active fraction was obtained from antihyperlipidemic bioactivity. The phytocomponents were separated from the active fraction using flash chromatography technique resulting in the isolation of n-hexatriacontane; 9-octadecenoic acid- octyl ester; 12, 14-heptacosanedione; dodecyl-octadeca-9,12-dienoate; tetracosanyl 9-hexadecenoate; heptacosan-14-ol; stigmasta- 5, 22- dien-3 beta-ol and stigmast-5-en-3 beta-ol. The phytocomponent structures were established by spectral data analysis. Intraperitoneal (i.p.) injection of Triton WR- 1339 at a dose of 400 mg/kg body weight (b.w.) was given to the animals. The ethanol extract at a dose of 200 mg/kg b.w. and chloroform fraction at a dose of 400 mg/kg b.w. were administered orally in rats after 24 hours of the Triton administration. Results: The study resulted in dose dependent inhibition of triglycerides (p <0.01), total cholesterol (p <0.05), Low density lipoprotein level (p <0.05) while significant increased HDL (p <0.01) level. Alteration in lipid profile in Triton treated rats was restored and found more effective in the chloroform fraction probably due to the presence of phytocomponents. The study elucidated different phytocomponents isolated from the active chloroform fraction of C. pluricaulis. Conclusion: Treatment with extract and fraction manifested significant decrease in triglyceride level. HDL exerts an inhibitory action in the etiology of atherosclerosis. It is considered as a beneficial lipoprotein and its lower level leads to the greater risk of CHD. It may be concluded that the isolated components were responsible for the lipid lowering level of active fraction. GRAPHICAL ABSTRACT

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