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Updated: Dec 30, 2025
Herbal Munziq Ameliorates Myocardial Ischemia-Reperfusion Injury by Inhibiting Inflammation
Published on: January 10, 2025
Mir-23a inhibition attenuates ischemic/reperfusion-induced myocardial apoptosis by targeting XIAP
Yuntao Cheng1, Ran Zhang1, Guangxia Yang2
1Department of Cardiology Medicine, Affiliated Hospital of Jining Medical University Jining, Shandong Province, P.R. China.
Abstract:
MicroRNAs are a group of single-strand, non-coding RNAs that inhibit the translation of protein-coding genes. Recent studies indicated that miRNAs are broadly involved in the development of cardiovascular diseases, including arrhythmia, hypertrophy, heart failure and cardiac injury. In this study, we report that miR-23a, a tumor suppressor, acts as an apoptotic promoter in rats undergoing ischemic/reperfusion. In rats subjected to ischemic/reperfusion injury, the expression of miR-23a in heart tissue was upregulated significantly. The infarct area and the apoptosis rate also increased. In contrast, knockdown of miR-23a by tail injection of antagomir-23a attenuated the ischemic/reperfusion injury. Moreover, we used Western blots to determine that miR-23a targeted XIAP to influence the expression of caspase and the NFkB pathway. In summary, miR-23a was shown to be part of a novel regulatory pathway that contributed to ischemic/reperfusion injury.
Insights
MicroRNAs (miRNAs) like miR-23a promote cell death in heart injury. Inhibiting miR-23a reduces damage from ischemia/reperfusion, revealing a new therapeutic target for cardiovascular diseases.
Area of Science:
- Cardiovascular Biology
- Molecular Medicine
- RNA Biology
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression.
- Emerging evidence links miRNAs to cardiovascular diseases, including cardiac injury.
- The specific role of miR-23a in cardiac ischemic/reperfusion injury remains unclear.
Purpose of the Study:
- To investigate the role of miR-23a in rat hearts subjected to ischemic/reperfusion (I/R) injury.
- To determine the molecular mechanisms by which miR-23a influences cardiac apoptosis.
- To evaluate miR-23a as a potential therapeutic target for I/R injury.
Main Methods:
- Induction of I/R injury in a rat model.
- Quantitative analysis of miR-23a expression in heart tissue.
- Assessment of infarct size and apoptosis rate.
- In vivo knockdown of miR-23a using antagomir-23a.
- Western blot analysis to examine protein expression and pathway activation.
Main Results:
- miR-23a expression was significantly upregulated in rat hearts post-I/R injury.
- Increased miR-23a correlated with larger infarct areas and higher apoptosis rates.
- Knockdown of miR-23a using antagomir-23a attenuated cardiac injury.
- miR-23a was found to target XIAP, modulating caspase and NFkB pathway activity.
Conclusions:
- miR-23a acts as a pro-apoptotic factor in cardiac I/R injury.
- miR-23a contributes to I/R injury by targeting XIAP and influencing downstream signaling pathways.
- Targeting miR-23a represents a potential novel therapeutic strategy for managing ischemic heart disease.
