Summary
Published in Cell Reports (2020), this peer-reviewed study used 3D Petri Dish® micro-molds to form scaffold-free 3D microtissues. Full citation: Rhee, June-Wha, et al. Modeling Secondary Iron Overload Cardiomyopathy with Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes
Modeling Secondary Iron Overload Cardiomyopathy with Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes
Research Overview
Iron overload cardiomyopathy begins as diastolic dysfunction and arrhythmia and can progress to end-stage heart failure, yet how iron accumulates in human cardiomyocytes and injures them is poorly understood. This study modeled the disease with human iPSC-derived cardiomyocytes and screened for drugs able to rescue the phenotype.
Under excess iron, the human cardiomyocytes recapitulated early-stage disease — oxidative stress, arrhythmia, and contractile dysfunction — and the authors found that iron-induced changes in calcium kinetics play a critical role in the loss of cardiomyocyte function, identifying a mechanistic target for intervention.
Key Discoveries
- Human iPSC-cardiomyocytes under excess iron reproduced early-stage iron overload cardiomyopathy
- Oxidative stress, arrhythmia, and contractile dysfunction all recapitulated in vitro
- Iron-induced calcium kinetics changes identified as critical to cardiomyocyte dysfunction
