Dataset Information


PERK-Mediated Suppression of microRNAs by Sildenafil Improves Mitochondrial Dysfunction in Heart Failure.

ABSTRACT: Oxidative/nitrosative stress is a major trigger of cardiac dysfunction, involving the unfolded protein response and mitochondrial dysfunction. Activation of nitric oxide-cyclic guanosine monophosphate-protein kinase G signaling by sildenafil improves cardiac mal-remodeling during pressure-overload-induced heart failure. Transcriptome analysis was conducted in failing hearts with or without sildenafil treatment. Protein kinase R-like endoplasmic reticulum (ER) kinase (PERK) downstream signaling pathways, EIF2 and NRF2, were significantly altered. Although EIF2 signaling was suppressed, NRF2 signaling was upregulated, inhibiting the maturation of miR 24-3p through EGFR-mediated Ago2 phosphorylation. To study the effect of sildenafil on these pathways, we generated cardiac-specific PERK knockout mice. In these mice, sildenafil could not inhibit the maturations, the nuclear translocation of NRF2 was suppressed, and mitochondrial dysfunction advanced. Altogether, these results show that PERK-mediated suppression of miRNAs by sildenafil is vital for maintaining mitochondrial homeostasis through NRF2-mediated oxidative stress response.


PROVIDER: S-EPMC7378464 | BioStudies | 2020-01-01

REPOSITORIES: biostudies

Similar Datasets

1000-01-01 | S-EPMC5719050 | BioStudies
2013-01-01 | S-EPMC3862672 | BioStudies
2016-01-01 | S-EPMC5342041 | BioStudies
2017-01-01 | S-EPMC5527107 | BioStudies
2018-01-01 | S-EPMC5870888 | BioStudies
2020-01-01 | S-EPMC7177322 | BioStudies
2011-01-01 | S-EPMC3087621 | BioStudies
2013-01-01 | S-EPMC3756900 | BioStudies
2011-01-01 | S-EPMC3752779 | BioStudies
2014-01-01 | S-EPMC4231078 | BioStudies