PMID- 35616318 OWN - NLM STAT- MEDLINE DCOM- 20220923 LR - 20221024 IS - 1613-4133 (Electronic) IS - 1613-4125 (Linking) VI - 66 IP - 18 DP - 2022 Sep TI - Adipocytes-Derived Exosomal microRNA-1224 Inhibits M2 Macrophage Polarization in Obesity-Induced Adipose Tissue Inflammation via MSI2-Mediated Wnt/beta-Catenin Axis. PG - e2100889 LID - 10.1002/mnfr.202100889 [doi] AB - SCOPE: Phenotypic switch of macrophage polarization in adipose tissue has been associated with obesity-induced adipose tissue inflammation (OATI). Therefore, this study aims to explore the possible mechanism of adipocytes-derived exosomes (ADEs) carrying microRNA-1224 (miR-1224) in M2 macrophage polarization of OATI. METHODS AND RESULTS: miR-1224-knockout (miR-1224-KO) mice for this study, and isolated primary adipocytes from high-fat diet (HFD) or normal diet (SD)-fed mice are developed. ADEs are extracted and cocultured with bone marrow-derived macrophages (BMDMs). The macrophagic crown-like structures (CLS) and M1 and M2 phenotype macrophages in epididymal white adipose tissue (epiWAT) are observed by immunohistochemistry and flow cytometry. The obtained data indicate that miR-1224 is highly expressed in adipose tissues and adipocytes of obese mice. miR-1224 knockout decreases CLS number and increases M2 macrophages polarization in epiWAT. In addition, miR-1224 can be transferred to BMDMs via ADEs, which targeted musashi RNA binding protein 2 (MSI2) expression and inactivated Wnt/beta-catenin pathway, inhibiting macrophage M2 polarization and promoting inflammatory factor release. CONCLUSION: Exosomal miR-1224 derived by adipocytes targets MSI2 and blocks the Wnt/beta-catenin pathway, which inhibits macrophage M2 polarization and promotes inflammatory factor release, ultimately promoting OATI. CI - (c) 2022 Wiley-VCH GmbH. FAU - Zhang, Dongdong AU - Zhang D AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Yao, Xiaoyan AU - Yao X AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Teng, Yaqin AU - Teng Y AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Zhao, Tiantian AU - Zhao T AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Lin, Liangyan AU - Lin L AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Li, Yuanyuan AU - Li Y AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Shang, Hongxia AU - Shang H AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Jin, Yongjun AU - Jin Y AUID- ORCID: 0000-0002-7834-8395 AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. FAU - Jin, Qingsong AU - Jin Q AD - Department of Endocrinology and Metabolism, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, P. R. China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20220728 PL - Germany TA - Mol Nutr Food Res JT - Molecular nutrition & food research JID - 101231818 RN - 0 (MIRN1224 microRNA, mouse) RN - 0 (MicroRNAs) RN - 0 (RNA-Binding Proteins) RN - 0 (beta Catenin) SB - IM MH - Adipocytes/metabolism MH - Adipose Tissue/metabolism MH - Animals MH - Inflammation/metabolism MH - Macrophages/metabolism MH - Mice MH - Mice, Inbred C57BL MH - Mice, Obese MH - *MicroRNAs/genetics/metabolism MH - Obesity/metabolism MH - RNA-Binding Proteins/metabolism MH - *beta Catenin/metabolism OTO - NOTNLM OT - M2 polarization OT - MSI2 OT - Wnt/beta-catenin pathway OT - adipocytes OT - exosomes OT - macrophage OT - microRNA-1224 OT - obesity adipose tissue inflammation EDAT- 2022/05/27 06:00 MHDA- 2022/09/24 06:00 CRDT- 2022/05/26 08:13 PHST- 2022/04/27 00:00 [revised] PHST- 2021/09/27 00:00 [received] PHST- 2022/05/27 06:00 [pubmed] PHST- 2022/09/24 06:00 [medline] PHST- 2022/05/26 08:13 [entrez] AID - 10.1002/mnfr.202100889 [doi] PST - ppublish SO - Mol Nutr Food Res. 2022 Sep;66(18):e2100889. doi: 10.1002/mnfr.202100889. Epub 2022 Jul 28.