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Updated: Apr 15, 2026
Surgically Induced Cardiac Volume Overload by Aortic Regurgitation in Mouse
Published on: August 30, 2022
Cardiac-specific PID1 overexpression enhances pressure overload-induced cardiac hypertrophy in mice
Yaoqiu Liu1, Yahui Shen, Jingai Zhu
1Department of Cardiology, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, China.
Background/Aims:
PID1 was originally described as an insulin sensitivity relevance protein, which is also highly expressed in heart tissue. However, its function in the heart is still to be elucidated. Thus this study aimed to investigate the role of PID1 in the heart in response to hypertrophic stimuli.
Methods:
Samples of human failing hearts from the left ventricles of dilated cardiomyopathy (DCM) patients undergoing heart transplants were collected. Transgenic mice with cardiomyocyte-specific overexpression of PID1 were generated, and cardiac hypertrophy was induced by transverse aortic constriction (TAC). The extent of cardiac hypertrophy was evaluated by echocardiography as well as pathological and molecular analyses of heart samples.
Results:
A significant increase in PID1 expression was observed in failing human hearts and TAC-treated wild-type mouse hearts. When compared with TAC-treated wild-type mouse hearts, PID1-TG mouse showed a significant exacerbation of cardiac hypertrophy, fibrosis, and dysfunction. Further analysis of the signaling pathway in vivo suggested that these adverse effects of PID1 were associated with the inhibition of AKT, and activation of MAPK pathway.
Conclusion:
Under pathological conditions, over-expression of PID1 promotes cardiac hypertrophy by regulating the Akt and MAPK pathway.
