LncRNA FAF attenuates hypoxia/ischaemia-induced pyroptosis via the miR-185-5p/PAK2 axis in cardiomyocytes.
Jie GuJian-Zhou ShiYa-Xing WangLiu LiuSi-Bo WangJia-Teng SunTian-Kai ShanHao WangQi-Ming WangLian-Sheng WangPublished in: Journal of cellular and molecular medicine (2022)
Pyroptosis is associated with various cardiovascular diseases. Increasing evidence suggests that long noncoding RNAs (lncRNAs) have been implicated in gene regulation, but how lncRNAs participate in the regulation of pyroptosis in the heart remains largely unknown. In this study, we aimed to explore the antipyroptotic effects of lncRNA FGF9-associated factor (FAF) in acute myocardial infarction (AMI). The expression patterns of lncRNA FAF, miR-185-5p and P21 activated kinase 2 (PAK2) were detected in hypoxia/ischaemia-induced cardiomyocytes. Hoechst 33342/PI staining, lactate dehydrogenase (LDH) release assay, immunofluorescence and Western blotting were conducted to assay cell pyroptosis. The interaction between lncRNA FAF, miR-185-5p and PAK2 was verified by bioinformatics analysis, small RNA sequencing luciferase reporter assay and qRT-PCR. The expression of LncRNA FAF was downregulated in hypoxic cardiomyocytes and myocardial tissues. Overexpression of lncRNA FAF could attenuate cardiomyocyte pyroptosis, improve cell viability and reduce infarct size during the procession of AMI. Moreover, lncRNA FAF was confirmed as a sponge of miR-185-5p and promoted PAK2 expression in cardiomyocytes. Collectively, our findings reveal a novel lncRNA FAF/miR-185-5p/PAK2 axis as a crucial regulator in cardiomyocyte pyroptosis, which might be a potential therapeutic target of AMI.
Keyphrases
- acute myocardial infarction
- high glucose
- long non coding rna
- poor prognosis
- nlrp inflammasome
- long noncoding rna
- endothelial cells
- cardiovascular disease
- high throughput
- left ventricular
- transcription factor
- stem cells
- cell proliferation
- type diabetes
- south africa
- drug induced
- risk assessment
- binding protein
- atrial fibrillation
- oxidative stress
- cell therapy
- bone marrow
- coronary artery disease
- network analysis
- genome wide identification