Sirt4 Deficiency Promotes Cardiomyocyte Proliferation and Cardiac Repair.

ABSTRACT: The mammalian heart exhibits transient but remarkable regenerative capacity during the early postnatal period, after which most cardiomyocytes exit the cell cycle. While the sirtuin family is well-established as regulators of cell cycle progression, its specific role in cardiomyocyte proliferation and cardiac regeneration remains unclear. In this study, we found that Sirt4 expression increased during postnatal heart development. Adenovirus-mediated Sirt4 overexpression in vitro inhibited cardiomyocyte proliferation by inducing oxidative DNA damage. Moreover, cardiomyocyte-specific Sirt4 overexpression in vivo suppressed cardiomyocyte proliferation and impaired neonatal heart regeneration. Using Sirt4-knockout mice, we found that Sirt4 deficiency promoted cardiomyocyte proliferation and ext

SUBMITTER: Liu W 

PROVIDER: S-EPMC12370541 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature