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- W4328053453 abstract "Heart formation requires transcriptional regulators that underlie congenital anomalies and the fetal gene program activated during heart failure. Attributing the effects of congenital heart disease (CHD) missense variants to disruption of specific protein domains allows for a mechanistic understanding of CHDs and improved diagnostics. A combined chemical and genetic approach was employed to identify novel CHD drivers, consisting of chemical screening during pluripotent stem cell (PSC) differentiation, gene expression analyses of native tissues and primary cell culture models, and the in vitro study of damaging missense variants from CHD patients. An epigenetic inhibitor of the TATA-Box Binding Protein Associated Factor 1 (TAF1) bromodomain was uncovered in an unbiased chemical screen for activators of atrial and ventricular fetal myosins in differentiating PSCs, leading to the development of a high affinity inhibitor (5.1 nM) of the TAF1 bromodomain, a component of the TFIID complex. TAF1 bromodomain inhibitors were tested for their effects on stem cell viability and cardiomyocyte differentiation, implicating a role for TAF1 in cardiogenesis. Damaging TAF1 missense variants from CHD patients were studied by mutational analysis of the TAF1 bromodomain, demonstrating a repressive role of TAF1 that can be abrogated by the introduction of damaging bromodomain variants or chemical TAF1 bromodomain inhibition. These results indicate that targeting the TAF1/TFIID complex with chemical compounds modulates cardiac transcription and identify an epigenetically-driven CHD mechanism due to damaging variants within the TAF1 bromodomain." @default.
- W4328053453 created "2023-03-22" @default.
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- W4328053453 date "2023-06-01" @default.
- W4328053453 modified "2023-09-30" @default.
- W4328053453 title "TAF1 bromodomain inhibition as a candidate epigenetic driver of congenital heart disease" @default.
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- W4328053453 doi "https://doi.org/10.1016/j.bbadis.2023.166689" @default.
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