PMID- 23793828 OWN - NLM STAT- MEDLINE DCOM- 20140225 LR - 20211021 IS - 1573-4978 (Electronic) IS - 0301-4851 (Linking) VI - 40 IP - 8 DP - 2013 Aug TI - Role of microRNA-21 in regulating 3T3-L1 adipocyte differentiation and adiponectin expression. PG - 5027-34 LID - 10.1007/s11033-013-2603-6 [doi] AB - MicroRNAs are endogenous small RNAs with a high degree of conservation, participating in a variety of vital activities. In present study, to explore the effect of microRNAs on 3T3-L1 adipocyte differentiation and adiponectin expression, the adipo-related microRNAs were screened and identified by micorRNA microarray. The highly expression plasmid of microRNA-21 with obvious expression up-regulation (miR-21) and its anti-sense (miR-21 inhibitor) were constructed and transfected into 3T3-L1 preadipocytes. The effect of miR-21 on 3T3-L1 adipocyte differentiation was observed, and the protein and mRNA expression level of adiponectin and AP-1 were analyzed. Results showed that, the expression profiles of microRNAs significantly changed during 3T3-L1 adipocyte differentiation. The expression of miR-21 was obviously up-regulated. miR-21 could significantly promote adipocyte differentiation, increase adiponectin mRNA and protein expression, while decrease AP-1 protein level. Meanwhil, miR-21 inhibitor blocked the effects of miR-21 mentioned above. The overexpression of AP-1 could absolutely reverse the stimulatory effect of miR-21 on adiponectin. miR-21 plays an important role in regulating adipocyte differentiation and adiponectin expression by inhibiting AP-1 expression. FAU - Kang, Min AU - Kang M AD - Department of Radiotherapy, First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China. FAU - Yan, Li-Mei AU - Yan LM FAU - Zhang, Wen-Yu AU - Zhang WY FAU - Li, Yu-Mei AU - Li YM FAU - Tang, An-Zhou AU - Tang AZ FAU - Ou, He-Sheng AU - Ou HS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130621 PL - Netherlands TA - Mol Biol Rep JT - Molecular biology reports JID - 0403234 RN - 0 (Adiponectin) RN - 0 (DNA Primers) RN - 0 (MIRN21 microRNA, mouse) RN - 0 (MicroRNAs) RN - 0 (Transcription Factor AP-1) SB - IM MH - 3T3-L1 Cells MH - Adipocytes/metabolism/*physiology MH - Adiponectin/*metabolism MH - Animals MH - Cell Differentiation/genetics/*physiology MH - DNA Primers/genetics MH - Gene Expression Profiling MH - Gene Expression Regulation/*genetics MH - Mice MH - MicroRNAs/*metabolism MH - Microarray Analysis MH - Transcription Factor AP-1/*metabolism MH - Transfection EDAT- 2013/06/25 06:00 MHDA- 2014/02/26 06:00 CRDT- 2013/06/25 06:00 PHST- 2012/08/15 00:00 [received] PHST- 2013/04/29 00:00 [accepted] PHST- 2013/06/25 06:00 [entrez] PHST- 2013/06/25 06:00 [pubmed] PHST- 2014/02/26 06:00 [medline] AID - 10.1007/s11033-013-2603-6 [doi] PST - ppublish SO - Mol Biol Rep. 2013 Aug;40(8):5027-34. doi: 10.1007/s11033-013-2603-6. Epub 2013 Jun 21.