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Over‐expressed microRNA‐27a and 27b influence fat accumulation and cell proliferation during rat hepatic stellate cell activation
Author(s) -
Ji Juling,
Zhang Jinsheng,
Huang Guangcun,
Qian Jin,
Wang Xueqing,
Mei Shuang
Publication year - 2009
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2009.01.034
Subject(s) - hepatic stellate cell , microrna , microbiology and biotechnology , cell growth , lipid droplet , cell , lipid metabolism , retinoid , hepatic fibrosis , biology , phenotype , cytoplasm , receptor , chemistry , cell culture , fibrosis , endocrinology , medicine , biochemistry , retinoic acid , gene , genetics
Hepatic stellate cells (HSCs) activation is an initial event in liver fibrosis. MicroRNAs (miRNAs) have been found to play essential roles in cell differentiation, proliferation, and fat metabolism. In this study, we showed that down‐regulation of two over‐expressed miRNAs, miR‐27a and 27b allowed culture‐activated rat HSCs to switch to a more quiescent HSC phenotype, with restored cytoplasmic lipid droplets and decreased cell proliferation. Mechanistically, retinoid X receptor α was confirmed to be the target of miR‐27a and 27b. These results indicated a new role and mechanism of miR‐27a and 27b in regulating fat metabolism and cell proliferation during HSCs activation.