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Updated: Jun 22, 2025

Transverse Aortic Constriction in Mice
Published on: April 21, 2010
TNIP3 protects against pathological cardiac hypertrophy by stabilizing STAT1
Hongjie Shi1,2, Yongjie Yu1,2, Dajun Li1,2
1Taikang Medical School (School of Basic Medical Sciences), Wuhan University, 430000, Wuhan, China.
TNFAIP3 interacting protein 3 (TNIP3) suppresses pathological cardiac hypertrophy by stabilizing STAT1. This discovery offers a new therapeutic target for heart failure and related cardiovascular diseases.
Area of Science:
- Cardiology
- Molecular Biology
- Biochemistry
Background:
- Pathological cardiac hypertrophy is a major risk factor for heart failure.
- The underlying mechanisms of cardiac hypertrophy are not fully understood.
Purpose of the Study:
- To investigate the role of TNFAIP3 interacting protein 3 (TNIP3) in pathological cardiac hypertrophy.
- To elucidate the molecular mechanism by which TNIP3 regulates cardiac hypertrophy.
Main Methods:
- Utilized mouse models of transverse aortic constriction (TAC) and phenylephrine (PE) stimulation.
- Employed RNA-sequencing, interactome analysis, immunoprecipitation, and GST assays.
- Investigated the effect of STAT1 inhibition and knockdown.
Main Results:
- TNIP3 expression was upregulated in hypertrophic hearts and cardiomyocytes.
- Tnip3 deficiency aggravated TAC-induced hypertrophy, while Tnip3 overexpression reversed it.
- TNIP3 directly interacted with STAT1, suppressing its degradation via K48-type ubiquitination.
- STAT1 inhibition or knockdown blocked TNIP3's protective effects.
Conclusions:
- TNIP3 acts as a novel suppressor of pathological cardiac hypertrophy.
- TNIP3 promotes STAT1 stability, thereby mitigating cardiac hypertrophy.
- TNIP3 represents a potential therapeutic target for heart failure.
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