β-Sitosterol exhibits anti-inflammatory activity in human aortic endothelial cells

Stella Loizou, Ioannis Lekakis, George P. Chrousos, Paraskevi Moutsatsou

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

β-Sitosterol, normally present in vegetable-containing diets, comprises an important component of cholesterol controlling functional foods. It has been associated with cardiovascular protection, exerting its effect mainly through increasing the antioxidant defense system and effectively lowering the serum cholesterol levels in humans. However, its anti-inflammatory effect on endothelium is unknown. Attachment of leukocytes to the vascular endothelium and the subsequent migration of cells into the vessel wall are early events in atherogenesis, this process requiring the expression of endothelial adhesion molecules. We examined the effect of β-sitosterol (0.1-200μM) on (i) the expression of vascular adhesion molecule 1 and intracellular adhesion molecule 1 by cell ELISA and (ii) the attachment of monocytes (U937 cells) in tumor necrosis factor-a (TNF-α)-stimulated human aortic endothelial cells (HAECs) by adhesion assay. The effect on nuclear factor-kB phosphorylation was also examined via a cell-based ELISA kit. Results showed that b-sitosterol inhibits significantly vascular adhesion molecule 1 and intracellular adhesion molecule 1 expression in TNF-α-stimulated HAEC as well as the binding of U937 cells to TNF-α-stimulated HAEC and attenuates the phosphorylation of nuclear factor-kB p65. This study extends existing data regarding the cardioprotective effect of β-sitosterol and provides new insights into understanding the molecular mechanism under-lying the beneficial effect of β-sitosterol on endothelial function.

Original languageEnglish
Pages (from-to)551-558
Number of pages8
JournalMolecular Nutrition and Food Research
Volume54
Issue number4
DOIs
Publication statusPublished - Apr 2010

Keywords

  • β-Sitosterol
  • Adhesion molecules
  • Atherosclerosis
  • Human aortic endothelial cell
  • Nuclear factor-kB

Fingerprint Dive into the research topics of 'β-Sitosterol exhibits anti-inflammatory activity in human aortic endothelial cells'. Together they form a unique fingerprint.

  • Cite this