Key result
Stat1 deficiency worsens cardiac hypertrophy and fibrosis in mice after transverse aortic constriction.
Why the study?
The role of Stat1 in pathological cardiac hypertrophy was poorly understood.
Does Stat1 protect against pressure overload-induced cardiac hypertrophy in mice?
Does Stat1 protect against pressure overload-induced cardiac hypertrophy in mice?
Stat1 protects against pressure overload-induced cardiac hypertrophy by downregulating hypertrophic and fibrotic genes and enhancing mitochondrial function via the Ucp2/P-Drp1 pathway.
Answers are grounded in this paper and cite their sources.
Supports Stat1 protection in murine pressure overload; hypothesis-generating for human HF therapies.
Signal transducers and transcriptional activation 1 (Stat1) is a member of the STATs family, and its role in various biological responses, including cell proliferation, differentiation, migration, apoptosis, and immune regulation has been extensively studied. We aimed to investigate its role in pathological cardiac hypertrophy, which is currently poorly understood. Experiments using H9C2 cardiomyocytes, Stat1, and IfngR cardiomyocyte-specific knockout mice revealed that Stat1 had a protective effect on cardiac hypertrophy. Using transverse aortic constriction (TAC)-induced cardiac hypertrophy in mice, we analyzed the degree of hypertrophy using echocardiography, pathology, and at the molecular level. Mice lacking Stat1 had more pronounced cardiac hypertrophy and fibrosis than wild-type TAC mice. Analysis of the molecular mechanisms suggested that Stat1 downregulated the mRNA levels of hypertrophy and fibrosis markers to inhibit cardiac hypertrophy, and promotes mitochondrial fission through the Ucp2/P-Drp1 pathway, enhancing mitochondrial function, and increasing compensatory myocardial ATP production in the compensatory phase for cardiac hypertrophy inhibition. Overall, this comprehensive analysis revealed that Stat1 inhibits cardiac hypertrophy by downregulating hypertrophic and fibrotic marker genes and enhancing the mitochondrial function to enhance cardiomyocyte function through the Ucp2/P-Drp1 signaling pathway.
No takes yet. Share an insight, caveat, or question.
Zhen et al. (2020) studied Cardiac hypertrophy. Stat1 knockout vs. Wild-type TAC mice was evaluated on Degree of cardiac hypertrophy and fibrosis. Stat1 deficiency in mice subjected to transverse aortic constriction resulted in more pronounced cardiac hypertrophy and fibrosis compared to wild-type mice.
Synapse has enriched 10 related papers. Consider them for comparative context: