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- W2003145436 abstract "The development of cardiac hypertrophy is mediated, in part, by increase in NADPH oxidase activity and myocardial oxidative stress. The Rho GTPase, Rac, regulates NADPH oxidase activity through interaction with gp91(phox) and p67(phox) (in which phox is phagocyte oxidase). However, it is not known which Rac isoform mediates this effect in the heart. Here we show that Rac1 is critical for generating oxidative stress and producing cardiac hypertrophy in the adult heart. The Rac1 gene was temporally and specifically deleted in adult mouse cardiomyocytes (c-Rac1(-/-)). Compared with wild-type or Rac1 heterozygous mice, the hearts of c-Rac1(-/-) mice showed decreased gp91(phox) and p67(phox) interaction, NADPH oxidase activity, and myocardial oxidative stress in response to angiotensin II (400 ng/kg per day for 2 weeks) stimulation. This result correlated with decreased myocardial hypertrophy. These results indicate that Rac1 is critical for the hypertrophic response in the heart and suggest that therapies which target myocardial Rac1 may be beneficial in the treatment of cardiac hypertrophy." @default.
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- W2003145436 date "2006-05-09" @default.
- W2003145436 modified "2023-10-16" @default.
- W2003145436 title "Requirement of Rac1 in the development of cardiac hypertrophy" @default.
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- W2003145436 doi "https://doi.org/10.1073/pnas.0510444103" @default.
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