Dietary Ethanolic Extract of Mangosteen pericarp Reduces VCAM-1, Perivascular Adipose Tissue and Aortic Intimal Medial Thickness in Hypercholesterolemic Rat Model

Abstract

BACKGROUND: High-fat diet (HFD) is associated with dyslipidemia which is a risk factor for atherosclerosis. Dyslipidemia causes oxidative stress which induces vascular cell adhesion molecule-1 (VCAM-1). Oxidative stress also triggers the thickening of tunica intima-media (IMT) and Perivascular Adipose Tissue (PVAT). Xanthone compound in ethanolic extract of Mangosteen pericarp (EEMP) has an antioxidant property to overcome the oxidative stress.

AIM: The objective of this study is to investigate the effect of dietary EEMP administration on the expression of VCAM-1 and thickness of PVAT and IMT in atherosclerotic rat model fed with HFD.

METHODS: This experimental laboratory study uses 25 Wistar strain Rattus norvegicus which were divided into 5 study groups. Negative Control group (GT1) was given a normal diet, Positive Control group (GT2) was treated with HFD, and three treatment groups were each treated with HFD with Mangosteen pericarp extract of 200 mg/kg BW (GT3), 400 mg/kg BW (GT4), and 800 mg/kg BW (GT5). Measurements of VCAM-1 expression were performed using immunofluorescence. PVAT and IMT measurements were performed on rat aortic preparations.

RESULTS: One-way ANOVA test showed the addition of dietary EEMP significantly (p < 0.05) decreased the expression of VCAM-1 and decreased the thickness of PVAT and IMT in treatment groups as compared with both negative and positive controls. Tukey HSD test showed a dose of 800 mg/kg BW was the most effective dose for decreasing VCAM-1 level, PVAT and IMT.

CONCLUSION: Dietary EEMP significantly decreases the expression of VCAM-1, as well as the thickness of PVAT and IMT in Wistar strain Rattus norvegicus treated with HFD.