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Updated: Aug 1, 2025
Developing 3D Organized Human Cardiac Tissue within a Microfluidic Platform
Published on: June 15, 2021
Vascular cells improve functionality of human cardiac organoids
Holly K Voges1, Simon R Foster2, Liam Reynolds2
1QIMR Berghofer Medical Research Institute, Brisbane, QLD 4006, Australia; School of Biomedical Sciences, The University of Queensland, Brisbane, QLD 4072, Australia; Murdoch Children's Research Institute, The Royal Children's Hospital, Melbourne, VIC 3052, Australia; Department of Paediatrics, School of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, VIC 3052, Australia; Novo Nordisk Foundation Center for Stem Cell Medicine, Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia.
Vascular cells in human cardiac organoids (hCOs) significantly improve maturation and contraction force. These cells are crucial for modeling heart disease and understanding cardiac function.
Area of Science:
- Cardiovascular Biology
- Stem Cell Biology
- Biomaterials Science
Background:
- Cardiac cell communication is vital for heart function.
- Human cardiac organoids (hCOs) are valuable models for studying the heart.
- The role of vascular cells in hCOs requires further elucidation.
Purpose of the Study:
- To optimize the generation of vascularized hCOs.
- To investigate the mechanisms of vascular cell-cardiomyocyte crosstalk.
- To assess the impact of vascular cells on hCO maturation and disease modeling.
Main Methods:
- Optimized protocol for generating multi-cellular hCOs including vascular cells.
- Co-culture systems to study cell-cell interactions.
- Molecular and functional assays to assess organoid maturation and contractility.
Main Results:
- Vascular cells enhance hCO maturation, force of contraction, and in-vivo-like structure formation.
- Endothelial-derived LAMA5 and paracrine PDGFRβ signaling promote sarcomeric protein expression and matrix deposition.
- Vascular cells modulate inflammatory-induced diastolic dysfunction, with endothelin identified as a key mediator.
Conclusions:
- Vascular cells are essential components for advanced cardiac organoid development and function.
- Specific molecular pathways involving LAMA5 and PDGFRβ mediate vascular cell-cardiomyocyte interactions.
- Vascularized hCOs provide a robust platform for studying cardiac diseases and therapeutic interventions.
