Over-expressed microRNA-27a and 27b influence fat accumulation and cell proliferation during rat hepatic stellate cell activation.
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 alpha 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.
Ji
Juling
J
Department of Pathology, Shanghai Medical College, Fudan University, 138 Yixueyuan Road, Shanghai 200032, PR China.
Zhang
Jinsheng
J
Huang
Guangcun
G
Qian
Jin
J
Wang
Xueqing
X
Mei
Shuang
S
D000818:Animals; D001391:Azo Compounds / Q000378:metabolism; D049109:Cell Proliferation; D002478:Cells, Cultured; D004396:Coloring Agents / Q000378:metabolism; D016650:Fluorescein-5-isothiocyanate / Q000378:metabolism; D005456:Fluorescent Dyes / Q000378:metabolism; D055166:Hepatic Stellate Cells / Q000378:metabolism* / Q000502:physiology*; D008055:Lipids / Q000096:biosynthesis*; D008297:Male; D035683:MicroRNAs; D051381:Rats; D017207:Rats, Sprague-Dawley
D001391:Azo Compounds; D004396:Coloring Agents; D005456:Fluorescent Dyes; D008055:Lipids; D035683:MicroRNAs; D016650:Fluorescein-5-isothiocyanate; C033006:sudan III