Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/33512
Title: Impairments in contractility and cytoskeletal organisation cause nuclear defects in nemaline myopathy
Authors: ROSS, Jacob A.LEVY, YotamRIPOLONE, MichelaKOLB, Justin S.TURMAINE, MarkHOLT, MarkLINDQVIST, JohanCLAEYS, Kristl G.WEIS, JoachimMONFORTE, MauroTASCA, GiorgioMOGGIO, MaurizioFIGEAC, NicolasZAMMIT, Peter S.JUNGBLUTH, HeinzFIORILLO, ChiaraVISSING, JohnWITTING, NannaGRANZIER, HenkZANOTELI, EdmarHARDEMAN, Edna C.WALLGREN-PETTERSSON, CarinaOCHALA, Julien
Citation: ACTA NEUROPATHOLOGICA, v.138, n.3, Special Issue, p.477-495, 2019
Abstract: Nemaline myopathy (NM) is a skeletal muscle disorder caused by mutations in genes that are generally involved in muscle contraction, in particular those related to the structure and/or regulation of the thin filament. Many pathogenic aspects of this disease remain largely unclear. Here, we report novel pathological defects in skeletal muscle fibres of mouse models and patients with NM: irregular spacing and morphology of nuclei; disrupted nuclear envelope; altered chromatin arrangement; and disorganisation of the cortical cytoskeleton. Impairments in contractility are the primary cause of these nuclear defects. We also establish the role of microtubule organisation in determining nuclear morphology, a phenomenon which is likely to contribute to nuclear alterations in this disease. Our results overlap with findings in diseases caused directly by mutations in nuclear envelope or cytoskeletal proteins. Given the important role of nuclear shape and envelope in regulating gene expression, and the cytoskeleton in maintaining muscle fibre integrity, our findings are likely to explain some of the hallmarks of NM, including contractile filament disarray, altered mechanical properties and broad transcriptional alterations.
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Artigos e Materiais de Revistas Científicas - FM/MNE
Departamento de Neurologia - FM/MNE

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - LIM/15
LIM/15 - Laboratório de Investigação em Neurologia


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