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Dai R, Ren Y, Lv X, Chang C, He S, Li Q, Yang X, Ren L, Wei R, Su Q. MicroRNA-30e-3p reduces coronary microembolism-induced cardiomyocyte pyroptosis and inflammation by sequestering HDAC2 from the SMAD7 promoter. Am J Physiol Cell Physiol 2023; 324:C222-C235. [PMID: 36622073 DOI: 10.1152/ajpcell.00351.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This study investigates the mechanism by which microRNA (miR)-30e-3p reduces coronary microembolism (CME)-induced cardiomyocyte pyroptosis and inflammation. Cardiac function tests, histological staining, and transmission electron microscopy were performed on CME-model rats injected with adeno-associated viral vectors. Cardiomyocytes were transfected 24 h before a cellular model of pyroptosis was established via treatment with 1 μg/mL lipopolysaccharide (LPS) for 4 h and 5 mM ATP for 30 min. Pyroptosis, inflammation, and Wnt/β-catenin signaling in cardiomyocytes were detected. Dual-luciferase reporter assays and/or RNA pull-down assays were performed to verify the binding of miR-30e-3p to HDAC2 mRNA or HDAC2 to the SMAD7 promoter. Chromatin immunoprecipitation was used to assess the level of H3K27 acetylation at the SMAD7 promoter. miR-30e-3p and SMAD7 expression levels were downregulated and HDAC2 expression was upregulated with CME. The overexpression of miR-30e-3p restored cardiac functions in CME-model rats and reduced serum cTnI, IL-18, and IL-1β levels, microinfarcts, inflammatory cell infiltration, apoptosis, collagen content, and GSDMD-N, cleaved caspase-1, and NLRP3 expression in the myocardium, but these effects were reversed by SMAD7 knockdown. The overexpression of miR-30e-3p or knockdown of HDAC2 reduced LDH, IL-18, and IL-1β secretion, propidium iodide intake, and GSDMD-N, NLRP3, cleaved caspase-1, Wnt3a, Wnt5a, and β-catenin expression in the cardiomyocyte model. miR-30e-3p inhibited the expression of HDAC2 by binding HDAC2 mRNA. HDAC2 repressed the expression of SMAD7 by catalyzing H3K27 deacetylation at the SMAD7 promoter. miR-30e-3p, by binding HDAC2 to promote SMAD7 expression, reduces CME-induced cardiomyocyte pyroptosis and inflammation.
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Affiliation(s)
- Rixin Dai
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Yanling Ren
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Xiangwei Lv
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Chen Chang
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Shirong He
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Quanzhong Li
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Xiheng Yang
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Lei Ren
- Department of Clinical Laboratory, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Riming Wei
- College of Biotechnology, Guilin Medical University, Guilin, People's Republic of China
| | - Qiang Su
- Department of Cardiology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China.,Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin, People's Republic of China
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