DNA Methylation, Smooth Muscle Cells, and Atherogenesis

Arteriosclerosis, Thrombosis, and Vascular Biology - Tập 23 Số 10 - Trang 1750-1753 - 2003
Mikko Hiltunen1, Seppo Ylä‐Herttuala1
1From the A.I. Virtanen Institute (M.O.H., S.Y.-H.) and Department of Medicine (S.Y.-H.), University of Kuopio, and Gene Therapy Unit (S.Y.-H.), Kuopio University Hospital, Kuopio, Finland.

Tóm tắt

DNA methylation is a form of epigenetic modification of the genome that can regulate gene expression. Hypermethylation of CpG islands in the promoter areas leads to decreased gene expression, whereas promoters of actively transcribed genes remain nonmethylated. Because of cellular proliferation and monoclonality of at least some of the lesion cells, atherosclerotic lesions have been compared with benign vascular tumors. 1,2 However, although genetic and epigenetic background favors neoplastic transformation, atherosclerotic plaques never develop to malignant tumors. Among cancer cells, common features are genome-wide hypomethylation, which correlates with transformation and tumor progression. Recent studies have shown that DNA methylation changes occur also during atherogenesis and may contribute to the lesion development.

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