RORa regulates developmental and angiotensin II-induced cardiac hypertrophy

RORasg/sg mice have small cardiomyocytes and hypocontractile hearts with increased fibrosis. Microarrays revealed broad deficits of sarcomeric RNAs and key myogenic transcription factors, suggesting that the loss of RORa leads to impaired developmental hypertrophy through transcriptional regulation. RORasg/sg mice developed exaggerated ventricular remodeling in response to Agn II infusion. We identify novel cardioprotective roles for RORa in promoting developmental and preventing pathological cardiac hypertrophy, mediated in part through regulation of the IL-6-STAT3 pathway in cardiomyocytes and cardiac fibrosis Heart total RNAs were purified from 5 WT and 4 RORasg/sg mice. Then the samples were applied to Agilent mouse genome chip.