4.7 Article

Arginyltransferase knockdown attenuates cardiac hypertrophy and fibrosis through TAK1-JNK1/2 pathway

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SCIENTIFIC REPORTS
卷 10, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41598-019-57379-7

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  1. Research Grant for INSA Young Scientist [SP/YSP/136/2016-1063]
  2. Drug Discovery Research Center (DDRC) - Revelation Biotech private limited (RBPL) project at THSTI [THS/6.7.16]
  3. Council of Scientific and Industrial Research (CSIR) [SPM-07/0512 (0223)/2015-EMR-l]

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Myocardial hypertrophy, an inflammatory condition of cardiac muscles is a maladaptive response of the heart to biomechanical stress, hemodynamic or neurohormonal stimuli. Previous studies indicated that knockout of Arginyltransferase (ATE1) gene in mice and embryos leads to contractile dysfunction, defective cardiovascular development, and impaired angiogenesis. Here we found that in adult rat model, downregulation of ATE1 mitigates cardiac hypertrophic, cardiac fibrosis as well as apoptosis responses in the presence of cardiac stress i.e. renal artery ligation. On contrary, in wild type cells responding to renal artery ligation, there is an increase of cellular ATE1 protein level. Further, we have shown the cardioprotective role of ATE1 silencing is mediated by the interruption of TAK1 activity-dependent JNK1/2 signaling pathway. We propose that ATE1 knockdown in presence of cardiac stress performs a cardioprotective action and the inhibition of its activity may provide a novel approach for the treatment of cardiac hypertrophy.

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