Wnt/β-Catenin Signaling during Cardiac Development and Repair

The document reviewed the role of Wnt/β-catenin signaling in cardiac development and repair, emphasizing its critical function in embryonic cardiac specification, progenitor expansion, and myocardial growth. During development, Wnt signaling was essential for cardiac progenitor and myocyte formation, requiring specific activation and repression phases. In adults, Wnt signaling was usually inactive but could be reactivated after ischemic injury, suggesting potential for cardiac repair. Animal model studies showed that modulating Wnt signaling could improve post-infarct outcomes, indicating its therapeutic potential for cardiac regeneration. However, the effects varied, with some interventions improving cardiac function and others increasing mortality, highlighting the importance of timing, dosage, and strategy in Wnt modulation. Further research was needed to understand the stage-specific effects of Wnt/β-catenin signaling on cardiac repair mechanisms.