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- W2004667966 abstract "Spinal muscular atrophy (SMA) is a devastating childhood motor neuron disease caused by mutations and deletions within the survival motor neuron 1 (SMN1) gene. Although other tissues may be involved, motor neurons remain primary pathological targets, with loss of neuromuscular junctions (NMJs) representing an early and significant event in pathogenesis. Although defects in axonal outgrowth and pathfinding have been observed in cell culture and in lower organisms upon Smn depletion, developmental defects in mouse models have been less obvious. Here, we have employed the Smn2B/− mouse model to investigate NMJ remodelling during SMA pathology, induced reinnervation, and paralysis. We show that whilst NMJs are capable of remodelling during pathogenesis, there is a marked reduction in paralysis-induced remodelling and in the nerve-directed re-organisation of acetylcholine receptors. This reduction in remodelling potential could not be attributed to a decreased rate of axonal growth. Finally, we have identified a loss of terminal Schwann cells which could contribute to the defects in remodelling/maintenance observed. Our work demonstrates that there are specific defects in NMJ remodelling in an intermediate SMA mouse model, which could contribute to or underlie pathogenesis in SMA. The development of strategies that can promote the remodelling potential of NMJs may therefore be of significant benefit to SMA patients." @default.
- W2004667966 created "2016-06-24" @default.
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- W2004667966 date "2013-01-01" @default.
- W2004667966 modified "2023-10-14" @default.
- W2004667966 title "Defects in neuromuscular junction remodelling in the Smn2B/− mouse model of spinal muscular atrophy" @default.
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- W2004667966 doi "https://doi.org/10.1016/j.nbd.2012.08.019" @default.
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