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Related Experiment Video

Updated: Sep 17, 2025

Preparation of Mesh-Shaped Engineered Cardiac Tissues Derived from Human iPS Cells for In Vivo Myocardial Repair
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Advanced tissue-engineered pulsatile conduit using human induced pluripotent stem cell-derived cardiomyocytes.

Hangqi Luo1, Christopher W Anderson2, Xin Li1

  • 1Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, Department of Internal Medicine Yale School of Medicine, New Haven, CT 06511, United States; Yale Stem Cell Center, New Haven, CT 06520, United States; Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520, United States.

Acta Biomaterialia
|June 29, 2025
PubMed
Summary
This summary is machine-generated.

Optimized tissue-engineered pulsatile conduits (TEPCs) using enhanced heart tissues and electrical pacing show improved pumping function for single ventricle heart defects. This offers a promising new treatment for patients with these life-threatening conditions.

Keywords:
CardiomyocytesEngineered heart tissueHuman induced pluripotent stem cellsTissue-engineered pulsatile conduit

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Cardiovascular Research

Background:

  • Single ventricle congenital heart defects (SVCHDs) present severe circulatory challenges and are often fatal without intervention.
  • The Fontan procedure, a common treatment, reroutes blood but lacks the active pumping essential for efficient pulmonary circulation.
  • Existing treatments highlight the need for improved solutions to enhance blood flow and reduce cardiac stress in SVCHD patients.

Purpose of the Study:

  • To develop and optimize a tissue-engineered pulsatile conduit (TEPC) capable of providing active pumping function for the pulmonary circulation in SVCHD patients.
  • To enhance the contractile productivity and pressure generation of the TEPC through electrical pacing and additional engineered heart tissue layers.
  • To assess the efficacy of the optimized TEPC design in addressing the circulatory inefficiencies associated with SVCHDs.

Main Methods:

  • Constructed a TEPC by wrapping engineered heart tissues (EHTs) from human induced pluripotent stem cell-derived cardiomyocytes (hiPSCCMs) around a decellularized human umbilical artery (dHUA) scaffold.
  • Implemented electrical pacing training and an additional EHT layer to the TEPC design.
  • Measured spontaneous and stimulated luminal pressure generation of the TEPC under varying electrical stimulation frequencies.

Main Results:

  • The optimized TEPC demonstrated significantly enhanced contractile productivity compared to the initial design.
  • Spontaneous pressure generation increased to 0.96 mmHg, and stimulated luminal pressure reached 1.87 mmHg at 2 Hz pacing.
  • These results indicate a substantial improvement in the active pumping capability of the TEPC.

Conclusions:

  • The optimized TEPC design, incorporating electrical pacing and enhanced EHT, significantly improves luminal pressure generation.
  • This advanced TEPC offers a promising therapeutic strategy to improve circulation and long-term outcomes for individuals with single ventricle congenital heart defects.
  • Further development of TEPCs holds potential for transformative treatments in pediatric cardiovascular surgery.