Genetic analysis of SS18L1 in French amyotrophic lateral sclerosis

• Published in: Neurobiology of aging Vol. 35; no. 5; pp. 1213.e9 - 1213.e12
• Main Authors: Teyssou, Elisa, Vandenberghe, Nadia, Moigneu, Carine, Boillée, Séverine, Couratier, Philippe, Meininger, Vincent, Pradat, Pierre-François, Salachas, François, LeGuern, Eric, Millecamps, Stéphanie
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.05.2014; Elsevier
• Subjects: Aged; Aged, 80 and over; Amyotrophic lateral sclerosis; Amyotrophic Lateral Sclerosis - genetics; Animals; Base Sequence; Chickens; CREST; Dendrites - physiology; Double mutant; European Continental Ancestry Group; Exons - genetics; Familial ALS; France; Genetic analysis; Genetic Variation; Humans; Internal Medicine; Life Sciences; Macaca mulatta; Mice; Molecular Sequence Data; Motor neuron disease; Mutation; Neurology; OPTN; Rats; Santé publique et épidémiologie; Trans-Activators - genetics; Transcription Factor TFIIIA - genetics; France; Familial ALS; CREST; Double mutant; Motor neuron disease; Genetic analysis; Amyotrophic lateral sclerosis; OPTN
• ISSN: 0197-4580; 1558-1497
• DOI: 10.1016/j.neurobiolaging.2013.11.023

Abstract Amyotrophic lateral sclerosis (ALS) is a devastating motor neuron disease including about 15% of genetically determined forms. A de novo mutation in the SS18L1 (also known as CREST or KIAA0693 ) gene encoding the calcium-responsive transactivator and/or neuronal chromatin remodeling complex subunit has recently been identified by exome sequencing of 47 sporadic ALS trios. This Q388stop mutation deleting the last 9 amino acids was shown to impair activity-dependent dendritic outgrowth. A missense mutation (c.369T>G, p.Ileu123Met) was also found in 1 of 62 ALS families previously screened for other ALS-related genes and not carrying any mutation. To confirm the contribution of SS18L1 to ALS, we sequenced the 11 coding exons and exon-intron boundaries in 87 familial ALS (FALS). We identified 2 variants: the c.660_668del, p.Gln222_Ser224del in a patient devoid of mutation in any ALS related genes and the c.790G>A, p.Ala264Thr in a patient carrying a p.Arg96Leu variant in the OPTN gene. As these variants were not found in Single Nucleotide Polymorphism databases and were absent from 180 controls they could be new SS18L1 mutations causing ALS.