Abstract：
:Differentiation of adipocytes and their aggregation to adipose tissue are critical for mammalian growth and development. MicroRNAs (miRNAs) are a class of endogenous small non-coding RNAs that play important roles in adipogenesis and lipid metabolism. miR-128-3p may contribute to adipose tissue development according to the previous studies. However, the role of miR-128-3p in the process of preadipocyte differentiation and lipid metabolism is not yet understood. The purpose of this research was to investigate the biological function and molecular mechanism of miR-128-3p in 3T3-L1 cells. In the present study, we found that miR-128-3p was downregulated during the process of 3T3-L1 preadipocyte differentiation. Overexpression of miR-128-3p obstructed the expressions of adipogenic marker genes as well as the lipid droplets accumulation and triglyceride content, suggesting the importance of miR-128-3p for adipogenesis. Moreover, miR-128-3p could lead to the retardation of cell proliferation in 3T3-L1 preadipocytes. Further evidences showed that, as a negative regulator of adipogenesis, miR-128-3p could directly target peroxisome proliferator-activated receptor γ (Pparg) which resulted in the suppression of 3T3-L1 preadipocyte differentiation, and miR-128-3p could also bind with SERTA domain containing 2 (Sertad2) which drove triglyceride hydrolysis and lipolysis. In addition, inhibition of Sertad2 with siRNA displayed the same effects as overexpression of miR-128-3p. Our research demonstrated that miR-128-3p impeded 3T3-L1 adipogenesis by targeting Pparg and Sertad2, resulting in the obstruction of preadipocyte differentiation and promotion of lipolysis. Taken together, this study offers profound insight into the mechanism of miRNA-mediated adipogenesis and lipid metabolism.
journal_name
J Physiol Biochemjournal_title
Journal of physiology and biochemistryauthors
Chen C,Deng Y,Hu X,Ren H,Zhu J,Fu S,Xie J,Peng Ydoi
10.1007/s13105-018-0625-1subject
Has Abstractpub_date
2018-08-01 00:00:00pages
381-393issue
3eissn
1138-7548issn
1877-8755pii
10.1007/s13105-018-0625-1journal_volume
74pub_type
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