Articles
Vol. 69 No. 3 (2025)
circRNA-79530 regulates Twist-mediated mitochondrial damage via sponging miR-214 affecting hypoxia/reoxygenation-induced injury in H9c2 cardiomyocytes
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All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Published: 22 August 2025
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Cardiomyocyte injury related to hypoxia/reoxygenation (H/R) is pivotal in myocardial infarction. The circular RNA circRNA-79530 (circ79530) may play a regulatory role in this process, though its exact function has yet to be elucidated. This research explores the role of circRNA-79530 in H9c2 cells under H/R, with a particular focus on its interactions with miR-214 and the transcription factor Twist. It also examines their subsequent effects on mitochondrial function and oxidative stress. H9c2 cardiomyocytes were subjected to H/R to model myocardial injury. We measured circRNA-79530, miR-214, and Twist levels via RT-qPCR, with Twist protein via Western blotting. ROS levels were quantified using DCFH-DA, and cell viability and injuries were assessed through CCK-8, LDH, SOD, and MDA assays, respectively. Mitochondrial performance was assessed through various methods, including the measurement of mitochondrial membrane potential using JC-1 staining, the quantification of ATP levels, and the examination of the protein levels of mitochondrial complexes, as well as the expression of fusion proteins. Our findings indicated that downregulation of circRNA-79530 modulated miR-214 and Twist expression, influencing mitochondrial dynamics and ROS production. Knockdown of circRNA-79530 improved cell viability, reduced oxidative stress and enhanced mitochondrial function. Additionally, overexpression of miR-214 mitigated Twist expression, further supporting the effect of miR-214 in H/R conditions. circRNA-79530 could worsen oxidative stress and mitochondrial dysfunction, and regulate Twist-mediated mitochondrial damage via sponging miR-214 in H9c2 cells under H/R conditions.
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Supporting Agencies
Regional Fund Project of the National Natural Science Foundation, Kunming Medical University, Science and Technology Office of Yunnan, Yunnan Province "Ten Thousand People Plan" - Famous Doctor Special ProgramHow to Cite
1.
Yu Z, Xu W, Teng Y, Li T, Guo R, Li J, et al. circRNA-79530 regulates Twist-mediated mitochondrial damage via sponging miR-214 affecting hypoxia/reoxygenation-induced injury in H9c2 cardiomyocytes. Eur J Histochem [Internet]. 2025 Aug. 22 [cited 2025 Dec. 28];69(3). Available from: https://www.ejh.it/ejh/article/view/4230
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