Unlocking the Heart's Code: Scientists Discover the Regenerative Seeds to Rejuvenate the Adult Heart
Release time:
2026-03-16
On March 10, Professor Wang Wei's research team from Xinqiao Hospital of Army Medical University, in collaboration with the First Hospital of Jilin University, published a groundbreaking study in Circulation, the top journal in the cardiovascular field. The study for the first time revealed the regenerative potential of mononuclear diploid cardiomyocytes in the heart, bringing a glimmer of hope to solving the century-old puzzle of the adult heart's inability to self-repair.
Myocardial infarction (MI) is a life-threatening severe heart injury. Due to the massive necrosis of cardiomyocytes, traditional treatments such as stenting and bypass surgery can only save lives but fail to regenerate the necrotic heart muscle. Puzzlingly, neonatal hearts can fully repair themselves weeks after an MI, while adult hearts completely lose this self-healing ability. The mechanism behind this difference has long been the core answer pursued by scientists worldwide.
Using high-precision lineage tracing technology, the research team labeled cardiomyocytes with unique identity markers and tracked their development and fate after injury, ultimately identifying a special type of cell: mononuclear diploid cardiomyocytes. Like elite seed players in the heart muscle, these cells possess extraordinary proliferative and reparative capabilities, serving as the key to cardiac regeneration.
Further analysis found that neonates have an abundant reserve of these "seed cells", endowing their hearts with robust repair capacity. However, during a critical window period of approximately one week after birth, most cardiomyocytes enter a polyploidization state—their chromosome number doubles but they lose the ability to divide—leading to a sharp decline in the number of seed cells. It is akin to mature seeds losing their ability to germinate, and the door to regeneration in the adult heart is thus closed.
Mouse experiments have verified the possibility of reversing this mechanism: inhibiting polyploidization before the critical window can increase the reserve of seed cells. Adult mice that suffered from MI showed significantly improved cardiac repair capacity, with reduced scarring and enhanced cardiac function. This means that activating these cells through drugs or interventional approaches may in the future restore the newborn-level self-healing ability to the adult human heart.
Professor Wang Wei emphasized that this study clarifies the mechanism of the decline in cardiac regeneration at the cellular subpopulation level, providing a brand-new target for myocardial regenerative therapy after MI. Although clinical application still needs to bridge the gap from basic research to translational medicine, this beam of scientific light has illuminated the path to recovery for tens of millions of MI patients.
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