Abstract
Pathological cardiac hypertrophy, which may lead to heart failure and sudden death, can be affected by multiple factors. In our previous study, we revealed that IKKi deficiency induced cardiac hypertrophy through the activation of the AKT and NF-kB signaling pathway in response to aortic banding (AB). Non-coding RNAs, mainly long non-coding RNAs (lncRNAs) and microRNAs (miRNAs), play a crucial role in normal developmental and pathological processes. In the present study, microarray analysis results from GEO database were analyzed, and upregulated lncRNAs in cardiac hypertrophy were identified. Of them, lncRNA cytoskeleton regulator RNA (CYTOR) obtained a fold-change of 6.16 and was positively correlated with IKBKE according to the data from The GTEx project. CYTOR knockdown significantly enhanced the inducible effect of AB operation on mice myocardial hypertrophy and Angiotensin II on cardiomyocyte hypertrophy. Moreover, miR-155 was significantly related to hypertrophic cardiomyopathy (HCM, |hsa05410) and predicted to target both CYTOR and IKBKE. Luciferase reporter and RIP assays revealed that CYTOR served as a ceRNA for miR-155 to counteract miR-155-mediated repression of IKBKE. Moreover, CYTOR knockdown reduced IKKi protein ...Continue Reading
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