Journal
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY
Volume 30, Issue 8, Pages 1634-+Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/ATVBAHA.110.207316
Keywords
angiogenesis; antioxidants; cytokines; endothelium; growth factors
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Funding
- Polish Ministry of Science and Higher Education [N301 31 314837, N301 144336, N301 08032/3156, 311/N-COST/2008/0]
- Foundation for Polish Science
- European Union [POIG. 02.01.00-12064/08, 02.02.00-00-014/08]
- Wellcome Trust
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Objective-Heme oxygenase-1 (HO-1) is an antioxidative, antiinflammatory, and cytoprotective enzyme that is induced in response to cellular stress. The HO-1 promoter contains a (GT)n microsatellite DNA, and the number of GT repeats can influence the occurrence of cardiovascular diseases. We elucidated the effect of this polymorphism on endothelial cells isolated from newborns of different genotypes. Methods and Results-On the basis of HO-1 expression, we classified the HO-1 promoter alleles into 3 groups: short (S) (most active, GT <= 23), medium (moderately active, GT=24 to 28), and long (least active, GT >= 29). The presence of the S allele led to higher basal HO-1 expression and stronger induction in response to cobalt protoporphyrin, prostaglandin-J(2), hydrogen peroxide, and lipopolysaccharide. Cells carrying the S allele survived better under oxidative stress, a fact associated with the lower concentration of oxidized glutathione and more favorable oxidative status, as determined by measurement of the ratio of glutathione to oxidized glutathione. Moreover, they proliferated more efficiently in response to vascular endothelial growth factor A, although the vascular endothelial growth factor-induced migration and sprouting of capillaries were not influenced. Finally, the presence of the S allele was associated with lower production of some proinflammatory mediators, such as interleukin-1 beta, interleukin-6, and soluble intercellular adhesion molecule-1. Conclusion-The (GT) n promoter polymorphism significantly modulates a cytoprotective, proangiogenic, and antiinflammatory function of HO-1 in human endothelium. (Arterioscler Thromb Vasc Biol. 2010;30:1634-1641.)
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