Vitamin E inhibits CD36 scavenger receptor expression in hypercholesterolemic rabbits

Nesrin Kartal Özer, Yesim Negis, Nurgül Aytan, Luis Villacorta, Roberta Ricciarelli, Jean Marc Zingg, Angelo Azzi

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A numerous studies suggest that Vitamin E has a preventive role in atherosclerosis, although the mechanism of action still remains unclear. CD36, a member of the scavenger receptor family is centrally involved in the uptake of oxidized low density proteins (oxLDLs) from bloodstream. During the atherosclerotic process, the lipid cargo of oxLDL accumulates in macrophages and smooth muscle cells, inducing their pathological conversion to foam cells. In the present study, we investigate the role of Vitamin E on CD36 expression in an in vivo model. Atherosclerosis was induced by a 2% cholesterol containing Vitamin E poor diet. Three groups of six rabbits each were studied. The first group (control) was fed on Vitamin E poor diet. The second group was fed with Vitamin E poor diet containing 2% cholesterol and the rabbits in the third group were fed with Vitamin E poor diet containing 2% cholesterol and received injections of 50 mg/kg of Vitamin E i.m. After 4 weeks, aortas were removed and analysed by light microscopy for atherosclerotic lesions. Aortic samples were analysed for CD36 mRNA expression. The aortas of cholesterol-fed rabbits showed typical atherosclerotic lesions, detected by macroscopic and microscopic examination, and exhibited an increase in CD36 mRNA expression. Vitamin E fully prevented cholesterol induced atherosclerotic lesions and the induction of CD36 mRNA expression. The effects observed at the level of CD36 scavenger receptor expression in vivo suggest an involvement of reduced foam cell formation in the protective effect of Vitamin E against atherosclerosis.

Original languageEnglish (US)
Pages (from-to)15-20
Number of pages6
JournalAtherosclerosis
Volume184
Issue number1
DOIs
StatePublished - Jan 2006
Externally publishedYes

Keywords

  • Alpha-tocopherol
  • Atherosclerosis
  • CD36
  • Rabbit aortic smooth muscle cells
  • Scavenger receptor
  • Vitamin E

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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