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Clinical genetics of amyotrophic lateral sclerosis: what do we really know?
Umeå University, Faculty of Medicine, Department of Pharmacology and Clinical Neuroscience.
2011 (English)In: Nature Reviews Neurology, ISSN 1759-4758, Vol. 7, no 11, 603-615 p.Article, review/survey (Refereed) Published
Abstract [en]

Hereditary amyotrophic lateral sclerosis (ALS) encompasses a group of genetic disorders characterized by adult-onset loss of the lower and upper motor neuron systems, often with involvement of other parts of the nervous system. Cases of hereditary ALS have been attributed to mutations in 12 different genes, the most common being SOD1, FUS and TARDBP-mutations in the other genes are rare. The identified genes explain 25-35% of cases of familial ALS, but identifying the remaining genes has proved difficult. Only a few genes seem to account for significant numbers of ALS cases, with many others causing a few cases each. Hereditary ALS can be inherited in an autosomal dominant, autosomal recessive or X-linked manner, and families with low disease penetrance are frequently observed. In such families, the genetic predisposition may remain unnoticed, so many patients carry a diagnosis of isolated or sporadic ALS. The only clinical feature that distinguishes recognized hereditary from apparently sporadic ALS is a lower mean age of onset in the former. All the clinical features reported in hereditary cases (including signs of extrapyramidal, cerebellar or cognitive involvement) have also been observed in sporadic cases. Genetic counseling and risk assessment in relatives depend on establishing the specific gene defect and the disease penetrance in the particular family.

Place, publisher, year, edition, pages
Nature Publishing Group , 2011. Vol. 7, no 11, 603-615 p.
National Category
Neurosciences Neurology
URN: urn:nbn:se:umu:diva-50135DOI: 10.1038/nrneurol.2011.150ISI: 000296735600003OAI: diva2:460379
Available from: 2011-11-30 Created: 2011-11-28 Last updated: 2011-11-30Bibliographically approved

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Andersen, Peter M.
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