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MiR-21 protects against cardiac hypertrophy in diastolic dysfunction db/db mice. a Histological analysis of cardiomyocyte by H&E staining. b–d Relative expression levels of ANP, BNP, β-MHC/α-MHC in heart from treated mice. e Representative images of ROS detected by DHE probe in frozen heart sections of db/db mice compared to controls
