TDP-43 mutations in familial and sporadic amyotrophic lateral sclerosis |
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Authors: | Sreedharan Jemeen Blair Ian P Tripathi Vineeta B Hu Xun Vance Caroline Rogelj Boris Ackerley Steven Durnall Jennifer C Williams Kelly L Buratti Emanuele Baralle Francisco de Belleroche Jacqueline Mitchell J Douglas Leigh P Nigel Al-Chalabi Ammar Miller Christopher C Nicholson Garth Shaw Christopher E |
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Affiliation: | Department of Clinical Neuroscience, King's College London, Medical Research Council (MRC) Centre for Neurodegeneration Research, and Institute of Psychiatry, London, SE5 8AF, UK. |
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Abstract: | Amyotrophic lateral sclerosis (ALS) is a fatal motor neuron disorder characterized pathologically by ubiquitinated TAR DNA binding protein (TDP-43) inclusions. The function of TDP-43 in the nervous system is uncertain, and a mechanistic role in neurodegeneration remains speculative. We identified neighboring mutations in a highly conserved region of TARDBP in sporadic and familial ALS cases. TARDBPM337V segregated with disease within one kindred and a genome-wide scan confirmed that linkage was restricted to chromosome 1p36, which contains the TARDBP locus. Mutant forms of TDP-43 fragmented in vitro more readily than wild type and, in vivo, caused neural apoptosis and developmental delay in the chick embryo. Our evidence suggests a pathophysiological link between TDP-43 and ALS. |
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