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Targeting the Hippo Pathway for Cardiac Regeneration
Rich Gang Li1,2,3, Fansen Meng1,2, James F Martin1,2,3,4
1Cardiomyocyte Renewal Laboratory, The Texas Heart Institute, Houston, Texas, United States.
Insights
Activating YAP in heart cells promotes their regeneration after injury, offering new hope for treating ischemic heart disease and preventing heart failure by restoring cardiac function.
Area of Science:
- Cardiovascular Biology
- Regenerative Medicine
- Molecular Cardiology
Background:
- Ischemic heart disease causes cardiomyocyte death and fibrotic scarring, leading to heart failure.
- Limited cardiomyocyte regenerative potential hinders recovery after cardiac injury.
- Current therapies improve blood flow but do not restore lost heart muscle.
Purpose of the Study:
- To explore the therapeutic potential of YAP activation for cardiac regeneration.
- To investigate YAP's role in cardiomyocyte proliferation and cardiac renewal.
- To understand intrinsic and microenvironmental factors influencing YAP-mediated cardiac repair.
Main Methods:
- Reviewing studies on Hippo signaling pathway modulation.
- Analyzing YAP's function as a transcription coactivator in cardiomyocytes.
- Examining YAP activation in adult murine and porcine models.
- Considering cardiomyocyte-intrinsic mechanisms and microenvironmental influences.
Main Results:
- Modulating the Hippo pathway to activate YAP induces robust cardiomyocyte proliferation.
- YAP activation demonstrates potential for stimulating cardiac tissue renewal.
- Insights into cardiomyocyte intrinsic mechanisms and microenvironment roles are provided.
Conclusions:
- YAP activation presents a promising therapeutic strategy for cardiac regeneration.
- Targeting YAP could address the inability of cardiomyocytes to renew after injury.
- Findings offer strategies for developing novel therapies for human heart disease.
Abstract:
Ischemic heart disease, which affects more than 200 million people worldwide, is caused by reduced blood flow to the heart and leads to widespread cardiomyocyte death. Due to the limited regenerative potential of cardiomyocytes, the lost tissue is replaced by a fibrotic scar, resulting in reduced cardiac function and progression to heart failure. Current therapeutic interventions aim to improve blood flow but cannot address the inability of cardiomyocytes to renew after injury. However, multiple studies have shown that modulating the Hippo signaling pathway to activate Yes-associated protein (YAP), a transcription coactivator, in adult murine and porcine cardiomyocytes induces robust cardiomyocyte proliferation. Here, we discuss the therapeutic potential of YAP activation in the context of cardiac renewal, with a focus on both cardiomyocyte intrinsic mechanisms and the role of the microenvironment. These findings provide important insights into cardiac regeneration and strategies for developing therapies for human patients.
