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- W4380487284 abstract "Abstract Fetal akinesia deformation sequence (FADS) represents the severest form of congenital myasthenic syndrome (CMS), a diverse group of inherited disorders characterised by impaired neuromuscular transmission. Most CMS originate from defects in the muscle nicotinic acetylcholine receptor, but the underlying molecular pathogenesis is only poorly understood. Here we show that RNAi-mediated silencing of FADS-related proteins rapsyn and NUP88 in foetal fibroblasts alters organisation of the actin cytoskeleton. We show that fibroblasts from two independent FADS individuals have enhanced and shorter actin stress fibre bundles, alongside with an increased number and size of focal adhesions, with an otherwise normal overall connectivity and integrity of the actin-myosin cytoskeleton network. By proximity ligation assays and bimolecular fluorescence complementation, we show that rapsyn and NUP88 localise nearby adhesion plaques and that they interact with the focal adhesion protein paxillin. Based on these findings we propose that a respective deficiency in rapsyn and NUP88 in FADS alters the regulation of actin dynamics at focal adhesions, and thereby may also plausibly dictate myofibril organisation and contraction in skeletal muscle of FADS individuals." @default.
- W4380487284 created "2023-06-14" @default.
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- W4380487284 date "2023-06-12" @default.
- W4380487284 modified "2023-09-24" @default.
- W4380487284 title "Alteration of actin cytoskeletal organisation in fetal akinesia deformation sequence" @default.
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- W4380487284 doi "https://doi.org/10.1101/2023.06.12.544620" @default.
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