PMID- 36092156 OWN - NLM STAT- MEDLINE DCOM- 20220913 LR - 20240118 IS - 1942-0994 (Electronic) IS - 1942-0900 (Print) IS - 1942-0994 (Linking) VI - 2022 DP - 2022 TI - Macrophage Rmp Ameliorates Myocardial Infarction by Modulating Macrophage Polarization in Mice. PG - 6248779 LID - 10.1155/2022/6248779 [doi] LID - 6248779 AB - BACKGROUND: Inflammation plays important roles during myocardial infarction (MI). Macrophage polarization is a major factor that drives the inflammatory process. Our previous study found that RNA polymerase II subunit 5-mediating protein (RMP) knockout in cardiomyocytes caused heart failure by impairing mitochondrial structure and function. However, whether macrophage RMP plays a role in MI has not been investigated. METHODS: Macrophage RMP-knockout in combination with a mouse model of MI was used to study the function of macrophage RMP in MI. Next, we modified bone marrow-derived macrophages (BMDMs) by plasmid transfection, and the BMDMs were administered to LysM-Cre/DTR mice by tail vein injection. Immunoblotting and immunofluorescence were used to detect macrophage polarization, fibrosis, angiogenesis, and the p38 signaling pathway in each group. RESULTS: Macrophage RMP deficiency aggravates cardiac dysfunction, promotes M1 polarization, and inhibits angiogenesis after MI. However, RMP overexpression in macrophages promotes M2 polarization and angiogenesis after MI. Mechanistically, we found that RMP regulates macrophage polarization through the heat shock protein 90- (HSP90-) p38 signaling pathway. CONCLUSIONS: Macrophage RMP plays a significant role in MI, likely by regulating macrophage polarization via the HSP90-p38 signaling pathway. CI - Copyright (c) 2022 Jian Zhang et al. FAU - Zhang, Jian AU - Zhang J AUID- ORCID: 0000-0002-2875-7713 AD - Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, No. 83, Wenhua Road, Shenhe District, Shenyang, Liaoning, China. FAU - Yin, Zongtao AU - Yin Z AD - Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, No. 83, Wenhua Road, Shenhe District, Shenyang, Liaoning, China. FAU - Yu, Liming AU - Yu L AD - Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, No. 83, Wenhua Road, Shenhe District, Shenyang, Liaoning, China. FAU - Wang, Zhishang AU - Wang Z AD - Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, No. 83, Wenhua Road, Shenhe District, Shenyang, Liaoning, China. FAU - Liu, Yu AU - Liu Y AD - Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, No. 83, Wenhua Road, Shenhe District, Shenyang, Liaoning, China. FAU - Huang, Xiaoru AU - Huang X AD - Department of Medicine & Therapeutics, and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong. FAU - Wan, Song AU - Wan S AUID- ORCID: 0000-0002-9394-1672 AD - Division of Cardiothoracic Surgery, Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong. FAU - Lan, Hui-Yao AU - Lan HY AUID- ORCID: 0000-0003-4283-9755 AD - Department of Medicine & Therapeutics, and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong. FAU - Wang, Huishan AU - Wang H AUID- ORCID: 0000-0001-6523-7488 AD - Department of Cardiovascular Surgery, General Hospital of Northern Theater Command, No. 83, Wenhua Road, Shenhe District, Shenyang, Liaoning, China. LA - eng PT - Journal Article PT - Retracted Publication DEP - 20220901 PL - United States TA - Oxid Med Cell Longev JT - Oxidative medicine and cellular longevity JID - 101479826 SB - IM RIN - Oxid Med Cell Longev. 2024 Jan 9;2024:9864679. PMID: 38234539 MH - Animals MH - Inflammation/metabolism MH - *Macrophage Activation MH - Macrophages/metabolism MH - Mice MH - *Myocardial Infarction/metabolism MH - Myocytes, Cardiac/metabolism PMC - PMC9459438 COIS- The authors have declared that no conflict of interest exists. EDAT- 2022/09/13 06:00 MHDA- 2022/09/14 06:00 PMCR- 2022/09/01 CRDT- 2022/09/12 04:12 PHST- 2022/05/23 00:00 [received] PHST- 2022/08/01 00:00 [revised] PHST- 2022/08/12 00:00 [accepted] PHST- 2022/09/12 04:12 [entrez] PHST- 2022/09/13 06:00 [pubmed] PHST- 2022/09/14 06:00 [medline] PHST- 2022/09/01 00:00 [pmc-release] AID - 10.1155/2022/6248779 [doi] PST - epublish SO - Oxid Med Cell Longev. 2022 Sep 1;2022:6248779. doi: 10.1155/2022/6248779. eCollection 2022.