Abstract
Organoids and microtissues offer the unique opportunity to dissect cell-cell interactions in an organ-specific context without confounding effects of organ failure or organism viability. In a study in this issue of Cell Stem Cell, Giacomelli etal. (2020) add human cardiac fibroblasts into cardiac microtissues and reveal striking fibroblast-endothelial-cardiomyocyte crosstalk that promotes advanced cardiomyocyte maturation.
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