Novel SACS mutations associated with intellectual disability, epilepsy and widespread supratentorial abnormalities
2016 (English)In: Journal of the Neurological Sciences, ISSN 0022-510X, E-ISSN 1878-5883, Vol. 371, 105-111 p.Article in journal (Refereed) Published
We describe eight subjects from two consanguineous families segregating with autosomal recessive childhood onset spastic ataxia, peripheral neuropathy and intellectual disability. The degree of intellectual disability varied from mild to severe and all four affected individuals in one family developed aggressive behavior and epilepsy. Using exome sequencing, we identified two novel truncating mutations (c.2656C>T (p.Gln886*)) and (c.4756_4760delAATCA (p.Asn1586Tyrfs*3)) in the SACS gene responsible for autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS). MRI revealed typical cerebellar and pontine changes associated with ARSACS as well as multiple supratentorial changes in both families as likely contributing factors to the cognitive symptoms. Intellectual disability and behavioral abnormalities have been reported in some cases of ARSACS but are not a part of the characteristic triad of symptoms that includes cerebellar ataxia, spasticity and peripheral neuropathy. Our combined findings bring further knowledge to the phenotypic spectrum, neurodegenerative changes and genetic variability associated with the SACS gene of clinical and diagnostic importance.
Place, publisher, year, edition, pages
2016. Vol. 371, 105-111 p.
IdentifiersURN: urn:nbn:se:uu:diva-309036DOI: 10.1016/j.jns.2016.10.032ISI: 000389399300024PubMedID: 27871429OAI: oai:DiVA.org:uu-309036DiVA: diva2:1051395
FunderSwedish Research Council, 2015-02424Science for Life Laboratory - a national resource center for high-throughput molecular bioscience