PMID- 36086866 OWN - NLM STAT- MEDLINE DCOM- 20221222 LR - 20221222 IS - 1099-0461 (Electronic) IS - 1095-6670 (Linking) VI - 36 IP - 12 DP - 2022 Dec TI - miR-208 inhibits myocardial tissues apoptosis in mice with acute myocardial infarction by targeting inhibition of PDCD4. PG - e23202 LID - 10.1002/jbt.23202 [doi] AB - This article aimed to investigate the role of miR-208 in the apoptosis of myocardial tissues in acute myocardial infarction (AMI) mice. The AMI mouse model was constructed. Then, miR-208 expression in AMI mice was regulated by transfection. The mouse myocardial tissues were subject to hematoxylin-eosin (HE) staining, TUNEL assay, and immunofluorescence analysis. H9c2 cell transfection and hypoxia induction were then completed, and cell apoptosis and cytokine levels were tested. Additionally, RNA pull-down and dual luciferase reporter gene assays were conducted for exploring the relation of miR-208 with programmed cell death 4 (PDCD4). Additionally, fluorescence in situ hybridization (FISH) was conducted for investigating miR-208 and PDCD4 colocalization within H9c2 cells. AMI mice had severe damage, apoptosis, decreased miR-208 expression, increased IL-1beta, IL-6, IL-8 levels, whereas reduced IL-10 level within myocardial tissues. H9c2 cells under hypoxia induction exhibited decreased miR-208 expression, promoted apoptosis, increased protein expression of Bax and cleaved-caspase-3, decreased protein expression of Bcl-2 and caspase-3, elevated IL-1beta, IL-6, IL-8 levels and decreased IL-10 level. miR-208 upregulation alleviated the damage and apoptosis of myocardial tissues in AMI mice. AMI mice with miR-208 upregulation showed decreased expression of Bax and cleaved-caspase-3, increased expression of Bcl-2 and caspase-3, reduced levels of IL-1beta, IL-6, IL-8, whereas an increased level of IL-10. miR-208 showed direct inhibition of PDCD4. PDCD4 and miR-208 were mainly co-expressed in the cytoplasm. The upregulated PDCD4 expression abolished miR-208's suppression of H9c2 cell apoptosis induced by hypoxia. Besides this, miR-208 inhibited myocardial tissue apoptosis in AMI mice by inhibiting PDCD4 expression. CI - (c) 2022 Wiley Periodicals LLC. FAU - Wang, Qiang AU - Wang Q AUID- ORCID: 0000-0002-2719-8809 AD - Department of Cardio-thoracic Surgery, Wujin Hospital Affiliated with Jiangsu University, The Wujin Clinical College of Xuzhou Medical University, Changzhou, People's Republic of China. FAU - Zhou, Huxiang AU - Zhou H AD - Medical College of Jiangsu University, Zhenjiang, People's Republic of China. FAU - Zhu, Xiaobo AU - Zhu X AD - Department of Cardio-thoracic Surgery, Wujin Hospital Affiliated with Jiangsu University, The Wujin Clinical College of Xuzhou Medical University, Changzhou, People's Republic of China. FAU - Jiang, Feng AU - Jiang F AD - Department of Cardio-thoracic Surgery, Wujin Hospital Affiliated with Jiangsu University, The Wujin Clinical College of Xuzhou Medical University, Changzhou, People's Republic of China. FAU - Yu, Qiuhua AU - Yu Q AD - Department of Cardio-thoracic Surgery, Wujin Hospital Affiliated with Jiangsu University, The Wujin Clinical College of Xuzhou Medical University, Changzhou, People's Republic of China. FAU - Zhang, Junjie AU - Zhang J AD - Department of Cardio-thoracic Surgery, Wujin Hospital Affiliated with Jiangsu University, The Wujin Clinical College of Xuzhou Medical University, Changzhou, People's Republic of China. FAU - Ji, Yaxiang AU - Ji Y AD - Department of Cardiac Ultrasound, Wujin Hospital Affiliated with Jiangsu University, The Wujin Clinical College of Xuzhou Medical University, Changzhou, People's Republic of China. LA - eng GR - H2019080/This study was supported by Scientific Research Project of Jiangsu Health and Health Commission/ GR - LGY2018018/The Fifth "333 Project" Talent Training Project in Jiangsu Province/ GR - WS2019014/Wujin District Science and Technology Bureau Project/ GR - WS201917/Wujin District Science and Technology Bureau Project/ PT - Journal Article DEP - 20220909 PL - United States TA - J Biochem Mol Toxicol JT - Journal of biochemical and molecular toxicology JID - 9717231 RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (bcl-2-Associated X Protein) RN - EC 3.4.22.- (Caspase 3) RN - 130068-27-8 (Interleukin-10) RN - 0 (Interleukin-6) RN - 0 (Interleukin-8) RN - 0 (MicroRNAs) RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (Pdcd4 protein, mouse) RN - 0 (Mirn208 microRNA, mouse) SB - IM MH - Animals MH - Mice MH - Apoptosis/genetics MH - *Apoptosis Regulatory Proteins/genetics/metabolism MH - bcl-2-Associated X Protein/metabolism MH - Caspase 3/metabolism MH - Hypoxia/metabolism MH - In Situ Hybridization, Fluorescence MH - Interleukin-10/metabolism MH - Interleukin-6/metabolism MH - Interleukin-8/metabolism MH - *MicroRNAs/metabolism MH - *Myocardial Infarction/genetics/metabolism MH - Myocytes, Cardiac/metabolism MH - Proto-Oncogene Proteins c-bcl-2/metabolism OTO - NOTNLM OT - AMI OT - PDCD4 OT - apoptosis OT - hypoxia OT - miR-208 EDAT- 2022/09/11 06:00 MHDA- 2022/12/17 06:00 CRDT- 2022/09/10 02:42 PHST- 2022/07/03 00:00 [revised] PHST- 2021/11/12 00:00 [received] PHST- 2022/08/16 00:00 [accepted] PHST- 2022/09/11 06:00 [pubmed] PHST- 2022/12/17 06:00 [medline] PHST- 2022/09/10 02:42 [entrez] AID - 10.1002/jbt.23202 [doi] PST - ppublish SO - J Biochem Mol Toxicol. 2022 Dec;36(12):e23202. doi: 10.1002/jbt.23202. Epub 2022 Sep 9.