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Efficient generation of TBX3

Rulong Du1, Shuyun Bai2, Ya Zhao2

  • 1School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China; Key Laboratory of Interdisciplinary Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.

Biochemical and Biophysical Research Communications
|June 4, 2023
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Summary
This summary is machine-generated.

Researchers generated atrioventricular conduction-like cardiomyocytes (AVCLCs) from human pluripotent stem cells (hPSCs). These cells offer a potential cell transplantation therapy for heart rhythm disorders like atrioventricular block.

Keywords:
Atrioventricular conduction cardiomyocytesHuman pluripotent stem cellMSX2NKX2.5TBX3

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Area of Science:

  • Cardiovascular Biology
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Atrioventricular conduction cardiomyocytes (AVCCs) are crucial for regulating heart rate and rhythm.
  • AVCC dysfunction, often due to aging or disease, leads to atrioventricular (AV) block, disrupting cardiac electrical signaling.
  • Human pluripotent stem cells (hPSCs) offer a source for generating functional AVCCs for therapeutic applications.

Purpose of the Study:

  • To develop a method for generating atrioventricular conduction-like cardiomyocytes (AVCLCs) from hPSCs.
  • To investigate the potential of these AVCLCs for treating AV block via cell transplantation.

Main Methods:

  • Stage-specific manipulation of retinoic acid (RA), WNT, and bone morphogenetic protein (BMP) signaling pathways in hPSCs.
  • Analysis of AVCC-specific marker expression (TBX3, MSX2, NKX2.5).
  • Assessment of electrophysiological characteristics, including conduction velocity.

Main Results:

  • Successfully generated AVCLCs from hPSCs.
  • AVCLCs expressed key AVCC-specific transcription factors (TBX3, MSX2, NKX2.5).
  • These cells exhibited functional electrophysiological properties with a low conduction velocity (0.07 ± 0.02 m/s).

Conclusions:

  • The study provides a novel strategy for generating AVCLCs from hPSCs.
  • These findings advance the understanding of atrioventricular conduction system development.
  • Generated AVCLCs represent a promising cell-based therapy for severe atrioventricular conduction block.