PMID- 34750028 OWN - NLM STAT- MEDLINE DCOM- 20220301 LR - 20220531 IS - 1876-4738 (Electronic) IS - 0914-5087 (Linking) VI - 79 IP - 3 DP - 2022 Mar TI - Inhibition of MicroRNA-92 alleviates atherogenesis by regulation of macrophage polarization through targeting KLF4. PG - 432-438 LID - S0914-5087(21)00289-6 [pii] LID - 10.1016/j.jjcc.2021.10.015 [doi] AB - BACKGROUND: Atherosclerosis is a chronic inflammatory disease in which macrophage polarization plays an important role in contribution to atherosclerotic plaque formation and stability. Here we tested the effect of miR-92 regulation on the development of atherosclerosis beyond tumorigenesis and explored the potential mechanism. METHODS AND RESULTS: In the present study, bone marrow derived macrophages (BMDMs), mouse peritoneal macrophages (MPMs), and human macrophages were used to test the expression of miR-92. Here we noticed miR-92 levels were enhanced in classic M1 macrophage but decreased in alternative M2 macrophage, respectively. In vitro, we demonstrated that macrophages transfected with miR-92 inhibitor attenuated proinflammatory cytokine secretion represented by polarized M1 markers but promoted anti-inflammatory state that was indicative of an M2 phenotype. Mechanistically, miR-92 was found to directly interact with KLF4 and we further identified a requirement role of KLF4 in mediating the effect of miR-92 silencing macrophage polarization. Concomitantly, miR-92 inhibition treated ApoE(-/-) mice promoted macrophage polarization toward alternative M2 macrophage, thus protecting against atherosclerotic plaque formation and preventing a vulnerable phenotype. CONCLUSION: miR-92 inhibition promoted alternative macrophage activation and attenuated atherosclerosis regression partially regulated in a KLF4-dependent manner, which indicated that miR-92/KLF4 axis may serve as a promising strategy for prevention of atherosclerotic diseases. CI - Copyright (c) 2021. Published by Elsevier Ltd. FAU - Gao, Feng AU - Gao F AD - Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China. FAU - Chen, Xueying AU - Chen X AD - Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Xu, Banglong AU - Xu B AD - Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China. FAU - Luo, Zhidan AU - Luo Z AD - Department of Geriatrics, Chongqing People's Hospital, Chongqing, China. FAU - Liang, Yi AU - Liang Y AD - Houston Methodist Research Institute, Center for Cardiovascular Regeneration, Houston, TX, USA. FAU - Fang, Sihua AU - Fang S AD - Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China. FAU - Li, Mengli AU - Li M AD - Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China. FAU - Wang, Xiaochen AU - Wang X AD - Department of Cardiology, Second Affiliated Hospital of Anhui Medical University, No.678 Furong Road, Economic Development District, Hefei 230601, Anhui Province, China. Electronic address: whayde@21cn.com. FAU - Lin, Xianhe AU - Lin X AD - Department of Cardiology, The First Affiliated Hospital of Anhui Medical University, No.218 Jixi Road, Shushan District, Hefei city 230601, Anhui Province, China. Electronic address: linxh_ah@126.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20211105 PL - Netherlands TA - J Cardiol JT - Journal of cardiology JID - 8804703 RN - 0 (Klf4 protein, mouse) RN - 0 (Kruppel-Like Factor 4) RN - 0 (MicroRNAs) RN - 0 (Mirn92 microRNA, mouse) SB - IM MH - Animals MH - *Atherosclerosis/genetics/prevention & control MH - Kruppel-Like Factor 4/metabolism MH - *Macrophage Activation MH - Macrophages/metabolism MH - Mice MH - *MicroRNAs/genetics/metabolism MH - *Plaque, Atherosclerotic OTO - NOTNLM OT - Atherosclerosis OT - KLF4 OT - Macrophage polarization OT - miR-92 COIS- Declaration of Competing Interest None. EDAT- 2021/11/10 06:00 MHDA- 2022/03/03 06:00 CRDT- 2021/11/09 05:52 PHST- 2021/07/27 00:00 [received] PHST- 2021/10/06 00:00 [revised] PHST- 2021/10/07 00:00 [accepted] PHST- 2021/11/10 06:00 [pubmed] PHST- 2022/03/03 06:00 [medline] PHST- 2021/11/09 05:52 [entrez] AID - S0914-5087(21)00289-6 [pii] AID - 10.1016/j.jjcc.2021.10.015 [doi] PST - ppublish SO - J Cardiol. 2022 Mar;79(3):432-438. doi: 10.1016/j.jjcc.2021.10.015. Epub 2021 Nov 5.