Abstract
Adult mammals are susceptible to substantial cardiomyocyte (CM) loss following various cardiac diseases due to the limited capacity of CM proliferation and regeneration. Recently, direct cardiac reprogramming, converting fibroblasts into induced CMs, has been achieved both in vitro and in vivo through forced expression of transcription factors (TFs). This review encapsulates the advancements made in enhancing reprogramming efficiency and underlying molecular mechanisms. It covers the optimization of TF-based reprogramming cocktails and in vivo delivery platform and recently identified regulators in enhancing reprogramming efficiency. In addition, we discuss recent insights into the molecular mechanisms of direct cardiac reprogramming from single-cell omics analyses. Finally, we briefly touch on remaining challenges and prospective direction of this field.
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