PMID- 33717243 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210316 IS - 1792-0981 (Print) IS - 1792-1015 (Electronic) IS - 1792-0981 (Linking) VI - 21 IP - 4 DP - 2021 Apr TI - Attenuated macrophage activation mediated by microRNA-183 knockdown through targeting NR4A2. PG - 300 LID - 10.3892/etm.2021.9731 [doi] LID - 300 AB - Atherosclerosis is considered a chronic inflammatory disease, and macrophages function as important mediators in the development of atherogenesis. MicroRNA (miR)-183 is a small non-coding RNA that acts as a novel tumor suppressor and has recently been proposed to affect cardiac hypertrophy. However, the exact role and underlying mechanism of miR-183 in macrophage activation remain unknown. In the present study, miR-183 showed upregulated expression in atheromatous plaques and in bone marrow-derived macrophages (BMDMs) subjected to stimulation with oxidized low-density lipoproteins. Using a miR-183 loss-of-function strategy, it was demonstrated that miR-183 knockdown significantly increased resolving M2 macrophage marker expression but decreased proinflammatory M1 macrophage marker expression, as well as attenuated NF-kappaB activation. Moreover, decreased foam-cell formation accompanied by upregulation of genes involved in cholesterol efflux and downregulation of genes implicated in cholesterol influx was found in BMDMs transfected with a miR-183 inhibitor. Mechanistically, macrophage activation mediated by miR-183 silencing was partially attributed to direct upregulation of NR4A2 expression in BMDMs. Thus, the present study suggests that neutralizing miR-183 may be a potential therapeutic strategy for the treatment of atherosclerosis. CI - Copyright (c) 2020, Spandidos Publications. FAU - Gong, Fu-Han AU - Gong FH AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Long, Li AU - Long L AD - Department of Clinical Laboratory, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Yang, Yong-Sheng AU - Yang YS AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Shen, De-Hong AU - Shen DH AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Zhang, Yu-Song AU - Zhang YS AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Wang, Xue-Sheng AU - Wang XS AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Zhang, Xue-Ping AU - Zhang XP AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. FAU - Xiao, Xiao-Qiang AU - Xiao XQ AD - Department of Cardiology, Tongren Municipal People's Hospital, Tongren, Guizhou 554300, P.R. China. LA - eng PT - Journal Article DEP - 20210129 PL - Greece TA - Exp Ther Med JT - Experimental and therapeutic medicine JID - 101531947 PMC - PMC7885059 OTO - NOTNLM OT - NR4A2 OT - atherosclerosis OT - inflammation OT - macrophage OT - microRNA-183 EDAT- 2021/03/16 06:00 MHDA- 2021/03/16 06:01 PMCR- 2021/01/29 CRDT- 2021/03/15 06:59 PHST- 2020/07/06 00:00 [received] PHST- 2020/12/30 00:00 [accepted] PHST- 2021/03/15 06:59 [entrez] PHST- 2021/03/16 06:00 [pubmed] PHST- 2021/03/16 06:01 [medline] PHST- 2021/01/29 00:00 [pmc-release] AID - ETM-0-0-09731 [pii] AID - 10.3892/etm.2021.9731 [doi] PST - ppublish SO - Exp Ther Med. 2021 Apr;21(4):300. doi: 10.3892/etm.2021.9731. Epub 2021 Jan 29.