view more
The study reveals that PRDM16 acts as a developmental “rheostat”: low levels permit cardiomyocytes to retain proliferative competence, whereas higher levels facilitate the acquisition of structural, metabolic, and functional characteristics associated with more mature heart cells. The findings provide a framework for improving regenerative strategies and generating higher-quality cardiac tissues for disease modeling and drug discovery.
Successful cardiac regeneration requires overcoming a fundamental biological dilemma. During embryonic development, cardiomyocytes proliferate extensively to build the heart. Shortly after birth, however, these cells progressively withdraw from the cell cycle and adopt specialized functions that support lifelong contraction. While this maturation process is essential for cardiac performance, it severely restricts the regenerative capacity of the adult human heart following injury.
Similarly, cardiomyocytes generated from iPS cells remain relatively immature, limiting their utility for translational applications. Understanding the molecular signals coordinating the transition from proliferation to maturation has therefore become a major objective in regenerative medicine.
