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miR‐34a Targets HDAC1‐Regulated H3K9 Acetylation on Lipid Accumulation Induced by Homocysteine in Foam Cells
Author(s) -
Zhao Qingguo,
Li Shuqiang,
Li Nan,
Yang Xiaoling,
Ma Shengchao,
Yang Anning,
Zhang Hui,
Yang Songhao,
Mao Caiyan,
Xu Lingbo,
Gao Tingting,
Yang Xiaoming,
Zhang Huiping,
Jiang Yideng
Publication year - 2017
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.26126
Subject(s) - hdac1 , homocysteine , acetylation , hyperhomocysteinemia , histone , histone h3 , methionine , chemistry , lysine , lipid metabolism , medicine , endocrinology , biochemistry , microbiology and biotechnology , histone deacetylase , biology , gene , amino acid
Hyperhomocysteinemia (HHcy) promotes atherogenesis by modification of histone acetylation patterns and regulation of miRNA expression while the underlying molecular mechanisms are not well known. In this study, we investigated the effects of homocysteine (Hcy) on the expression of histone deacetylase 1 (HDAC1) and tested our hypothesis that Hcy‐induced atherosclerosis is mediated by increased HDAC1 expression, which is regulated by miR‐34a. The expression of HDAC1 increased and acetylation of histone H3 at lysine 9 (H3K9ac) decreased in the aorta of ApoE −/− mice fed with high methionine diet, whereas miR‐34a expression was inhibited. Over‐expression of HDAC1 inhibited H3K9ac level and promoted the accumulation of total cholesterol, free cholesterol, and triglycerides in the foam cells. Furthermore, up‐regulation of miR‐34a reduced HDAC1 expression and inhibited the accumulation of total cholesterol (TC), free cholesterol (FC), and triglycerides (TG) in the foam cells. These data suggest that HDAC1‐related H3K9ac plays a key role in Hcy‐mediated lipid metabolism disorders, and that miR‐34a may be a novel therapeutic target in Hcy‐related atherosclerosis. J. Cell. Biochem. 118: 4617–4627, 2017. © 2017 Wiley Periodicals, Inc.