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Related Experiment Video

Updated: Dec 13, 2025

Suppression of Pro-fibrotic Signaling Potentiates Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts into Induced Cardiomyocytes
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An Optimized Protocol for Human Direct Cardiac Reprogramming.

Tiffany A Garbutt1,2,3,4, Yang Zhou1,2,5,3, Benjamin Keepers1,2

  • 1Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.

STAR Protocols
|July 31, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces an efficient new method for direct cardiac reprogramming, converting fibroblasts into cardiomyocyte-like cells (hiCMs) in just two weeks. The novel protocol achieves high efficiency, offering a promising approach for heart repair strategies.

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Last Updated: Dec 13, 2025

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Area of Science:

  • Cardiovascular Biology
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Direct cardiac reprogramming offers a potential therapeutic strategy for cardiac repair by converting somatic cells into cardiomyocyte-like cells.
  • Existing protocols for human cardiac reprogramming face limitations in efficiency and time.

Purpose of the Study:

  • To develop a novel and highly efficient protocol for direct cardiac reprogramming of human fibroblasts into cardiomyocyte-like cells (hiCMs).
  • To characterize the efficiency and functional properties of hiCMs generated by the new protocol.

Main Methods:

  • Utilized a polycistronic three-factor reprogramming cocktail combined with a specific microRNA.
  • Applied the protocol to human fibroblasts for direct conversion into hiCMs.

Main Results:

  • Achieved a 40%-60% efficiency in generating cardiac Troponin T-positive hiCMs within 2 weeks.
  • The generated hiCMs exhibited cardiomyocyte-like sarcomere structure, gene expression profiles, and functional calcium oscillations.
  • The efficiency was approximately double that of previously reported protocols.

Conclusions:

  • The novel reprogramming protocol significantly enhances the efficiency and speed of generating functional hiCMs.
  • This optimized direct cardiac reprogramming method holds promise for future applications in regenerative cardiology and treating heart disease.