ArticleCytoJournal2025
Exploring miR-3148's impact on Krüppel-like factor 6-driven mitophagy and apoptosis in myocardial ischemic injury.
Article in CytoJournal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: Myocardial infarction (MI) is a leading cause of death worldwide, accounting for millions of fatalities annually. The injury and repair of cardiomyocytes are closely associated with the changes in gene expression. MicroRNAs could serve as a potential target for MI treatment. This work aims to investigate the role of miR-3148 in mitochondrial dynamics during acute MI (AMI) with a specific focus on its regulatory mechanisms in mitophagy and apoptosis, which could reveal potential therapeutic targets for AMI treatment. Material and Methods: MiR-3148 levels in patients with AMI and experimental models were measured to assess the effects of miR-3148 on cardiomyocyte viability under oxygen and glucose deprivation (OGD). The present investigation involved monitoring mitophagy markers, including PTEN-induced kinase 1 (PINK1), parkin RBR E3 ubiquitin-protein ligase (Parkin), Beclin1, and microtubule-associated protein 1A/1B light chain 3 II/I (LC3 II/I) ratio, as well as apoptotic markers such as cysteine-aspartic acid protease (Caspase) 9, Caspase 3, and cytochrome C (Cyt C). In addition, Krüppel-like factor 6 (KLF6) was examined as a target of miR-3148. Results: MiR-3148 was significantly elevated in patients with AMI and models. MiR-3148 overexpression reduced cardiomyocyte viability, whereas miR-3148 knockdown protected against OGD injury. The inhibition of miR-3148 activated mitophagy, as shown by the increased PINK1, Parkin, Beclin1 levels, and LC3 II/I ratios, and reduced sequestosome 1 (p62), and apoptotic markers levels. MiR-3148 directly targeted KLF6, reducing its expression. The suppression of KLF6 aggravated OGD injury by disrupting PINK1/Parkin-mediated mitophagy and enhancing apoptosis. Attenuating KLF6 expression reversed the protective effects of miR-3148 inhibition, indicating reciprocal regulation. Conclusion: In myocardial ischemic injury, miR-3148 modulates PINK1/Parkin-mediated mitophagy and apoptosis through KLF6 regulation. This finding highlights miR-3148 as a key factor in the pathogenesis of AMI and as a potential therapeutic target.
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