Abstract
Induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) have enormous potential for the study of human cardiac disorders. However, their physiological immaturity severely limits their utility as a model system and their adoption for drug discovery. Here, we describe maturation media designed to provide oxidative substrates adapted to the metabolic needs of human iPSC (hiPSC)-CMs. Compared with conventionally cultured hiPSC-CMs, metabolically matured hiPSC-CMs contract with greater force and show an increased reliance on cardiac sodium (Na+) channels and sarcoplasmic reticulum calcium (Ca2+) cycling. The media enhance the function, long-term survival, and sarcomere structures in engineered heart tissues. Use of the maturation media made it possible to reliably model two genetic cardiac diseases: long QT syndrome type 3 due to a mutation in the cardiac Na+ channel SCN5A and dilated cardiomyopathy due to a mutation in the RNA splicing factor RBM20. The maturation media should increase the fidelity of hiPSC-CMs as disease models.
| Original language | English |
|---|---|
| Article number | 107925 |
| Journal | Cell Reports |
| Volume | 32 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 21 Jul 2020 |
Keywords
- cardiomyocyte
- dilated cardiomyopathy
- disease modeling
- engineered heart tissues
- induced pluripotent stem cells
- long QT syndrome 3
- maturation
- physiology
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