Abstract
Barth syndrome is a rare X-linked genetic disorder caused by mutations in the tafazzin (TAZ) gene that result in dilated cardiomyopathy, skeletal myopathy and neutropenia. Tafazzin has a mitochondrial function, and a new study using cardiomyocytes derived from induced pluripotent stem cells (iPSCs) from humans with Barth syndrome identifies increased mitochondrial reactive oxygen species (ROS) production as a key intermediate causing cardiac contractile dysfunction (pages 616–623).
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