Related Experiment Videos
Subtype-specific differentiation of cardiac pacemaker cell clusters from human induced pluripotent stem cells
Patrick A Schweizer1,2, Fabrice F Darche3, Nina D Ullrich4,5
1Department of Cardiology, Medical University Hospital Heidelberg, INF 410, D-69120, Heidelberg, Germany. patrick.schweizer@med.uni-heidelberg.de.
Stem Cell Research & Therapy
|October 18, 2017
Summary
Researchers developed a novel method to generate human induced pluripotent stem cells (hiPSC)-derived pacemaker cells. This transgene-free approach offers potential for sinoatrial node (SAN) disease modeling and cell replacement therapy.
Area of Science:
- Stem Cell Biology
- Cardiovascular Research
- Regenerative Medicine
Background:
- Human induced pluripotent stem cells (hiPSC) can differentiate into various cardiac cell types.
- Previous research focused on generating ventricular cardiomyocytes from hiPSC.
- A need exists for efficient methods to generate pacemaker cells for modeling and therapy.
Purpose of the Study:
- To develop a straightforward approach for selectively differentiating hiPSC into pacemaker-type cells.
- To establish a method for modeling and potentially replacing sinoatrial node (SAN) function.
Main Methods:
- hiPSC were co-cultured with visceral endoderm-like cells in serum-free medium.
- Early beating clusters were transferred to FBS-enriched medium to suppress working-type cardiomyogenesis.
- Characterization involved qRT-PCR, immunocytochemistry, patch-clamp electrophysiology, and pharmacological stimulation.
Main Results:
- Spontaneously beating clusters with high expression of pacemaker genes (HCN4, TBX3, TBX18) were generated.
- hiPSC-derived cells exhibited nodal-type (63.4%) and atrial-type (36.6%) action potentials, without ventricular types.
- Clusters showed regular beating (70-90 bpm), spontaneous Ca2+ transients, and paced neonatal rat ventricular myocytes.
Conclusions:
- A novel, transgene-free, media-based method efficiently generates hiPSC-derived pacemaker-type cells.
- These cells form clusters and exhibit key pacemaker properties.
- The approach holds promise for SAN disease modeling, drug testing, and cell-based replacement therapy.