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<dc:title xml:lang="en">Study of the role of NUP50 and the pathogenicity of its mutations associated with amyotrophic lateral sclerosis</dc:title>
<dcterms:alternative xml:lang="fr">Étude du rôle de la protéine NUP50 et de la pathogénicité de ses mutations associées à la sclérose latérale amyotrophique</dcterms:alternative>
<dc:subject xml:lang="fr">Sclérose Latérale Amyotrophique</dc:subject>
<dc:subject xml:lang="fr">NUP50</dc:subject>
<dc:subject xml:lang="fr">Pore nucléaire</dc:subject>
<dc:subject xml:lang="fr">Neurone moteur</dc:subject>
<dc:subject xml:lang="en">Amyotrophic Lateral Sclerosis</dc:subject>
<dc:subject xml:lang="en">NUP50</dc:subject>
<dc:subject xml:lang="en">Nuclear pore complex</dc:subject>
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<tef:elementdEntree autoriteExterne="027313689" autoriteSource="Sudoc">Neurones moteurs</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">NUP50, une nucléoporine faisant partie du pore nucléaire (NPC), est génétiquement liée à la SLA via des variants rares et une haploinsuffisance. Nous avons étudié les variants NUP50 associés à la SLA et la perte de NUP50 dans des cellules souches pluripotentes induites humaines (hiPSCs) et des motoneurones dérivés de hiPSCs. Nous avons montré que les variants NUP50 liés à la SLA modifient de manière différentielle l'interactome NUP50, entraînant des défauts d'import nucléaire, une toxicité des motoneurones et des défauts moteurs chez le poisson-zèbre. Dans les hiPSCs, la déplétion de NUP50 seule déclenche des défauts précoces subtils du NPC et une réponse transcriptomique au stress. Ces données impliquent que le dysfonctionnement de NUP50, et la perturbation du NPC qui en résulte, sont un facteur en amont plausible de l'altération du transport nucléocytoplasmique dans la SLA liée à NUP50.</dcterms:abstract>
<dcterms:abstract xml:lang="en">NUP50, a nuclear basket nucleoporin part of the nuclear pore complex (NPC), is genetically linked to ALS through rare variants and haploinsufficiency. We investigated ALS-associated NUP50 variants and NUP50 loss in human induced pluripotent stem cells (hiPSC) and hiPSC-derived motor neurons. We have shown that ALS-linked NUP50 variants differentially alter the NUP50 interactome, leading to nuclear import defects, motor neuron toxicity and motor defects in zebrafish. In hiPSCs, NUP50 depletion alone triggers early subtle NPC defects and a transcriptomic stress response. These data implicate NUP50 dysfunction, and consequent NPC disruption, as a plausible upstream contributor to nucleocytoplasmic transport impairment in NUP50-ALS.</dcterms:abstract>
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