Corticobasal and ataxia syndromes widen the spectrum of C9ORF72 hexanucleotide expansion disease
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Corticobasal and ataxia syndromes widen the spectrum of C9ORF72 hexanucleotide expansion disease. / Lindquist, Sg; Duno, M; Batbayli, M; Puschmann, A; Braendgaard, H; Mardosiene, S; Svenstrup, K; Pinborg, Lh; Vestergaard, K; Hjermind, LE; Stokholm, J; Andersen, Bb; Johannsen, P; Nielsen, Jørgen Erik.
I: Clinical Genetics, Bind 83, Nr. 3, 03.2013, s. 279-283.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Corticobasal and ataxia syndromes widen the spectrum of C9ORF72 hexanucleotide expansion disease
AU - Lindquist, Sg
AU - Duno, M
AU - Batbayli, M
AU - Puschmann, A
AU - Braendgaard, H
AU - Mardosiene, S
AU - Svenstrup, K
AU - Pinborg, Lh
AU - Vestergaard, K
AU - Hjermind, LE
AU - Stokholm, J
AU - Andersen, Bb
AU - Johannsen, P
AU - Nielsen, Jørgen Erik
N1 - © 2012 John Wiley & Sons A/S.
PY - 2013/3
Y1 - 2013/3
N2 - Recently, a hexanucleotide (GGGGCC) repeat expansion in the first intron of C9ORF72 was reported as the cause of chromosome 9p21-linked frontotemporal dementia-amyotrophic lateral sclerosis (FTD-ALS). We here report the prevalence of the expansion in a hospital-based cohort and associated clinical features indicating a wider clinical spectrum of C9ORF72 disease than previously described. We studied 280 patients previously screened for mutations in genes involved in early onset autosomal dominant inherited dementia disorders. A repeat-primed polymerase chain reaction amplification assay was used to identify pathogenic GGGGCC expansions. As a potential modifier, confirmed cases were further investigated for abnormal CAG expansions in ATXN2. A pathogenic GGGGCC expansion was identified in a total of 14 probands. Three of these presented with atypical clinical features and were previously diagnosed with clinical olivopontocerebellar degeneration (OPCD), atypical Parkinsonian syndrome (APS) and a corticobasal syndrome (CBS). Further, the pathogenic expansion was identified in six FTD patients, four patients with FTD-ALS and one ALS patient. All confirmed cases had normal ATXN2 repeat sizes. Our study widens the clinical spectrum of C9ORF72related disease and confirms the hexanucleotide expansion as a prevalent cause of FTD-ALS disorders. There was no indication of a modifying effect of the ATXN2 gene.
AB - Recently, a hexanucleotide (GGGGCC) repeat expansion in the first intron of C9ORF72 was reported as the cause of chromosome 9p21-linked frontotemporal dementia-amyotrophic lateral sclerosis (FTD-ALS). We here report the prevalence of the expansion in a hospital-based cohort and associated clinical features indicating a wider clinical spectrum of C9ORF72 disease than previously described. We studied 280 patients previously screened for mutations in genes involved in early onset autosomal dominant inherited dementia disorders. A repeat-primed polymerase chain reaction amplification assay was used to identify pathogenic GGGGCC expansions. As a potential modifier, confirmed cases were further investigated for abnormal CAG expansions in ATXN2. A pathogenic GGGGCC expansion was identified in a total of 14 probands. Three of these presented with atypical clinical features and were previously diagnosed with clinical olivopontocerebellar degeneration (OPCD), atypical Parkinsonian syndrome (APS) and a corticobasal syndrome (CBS). Further, the pathogenic expansion was identified in six FTD patients, four patients with FTD-ALS and one ALS patient. All confirmed cases had normal ATXN2 repeat sizes. Our study widens the clinical spectrum of C9ORF72related disease and confirms the hexanucleotide expansion as a prevalent cause of FTD-ALS disorders. There was no indication of a modifying effect of the ATXN2 gene.
U2 - 10.1111/j.1399-0004.2012.01903.x
DO - 10.1111/j.1399-0004.2012.01903.x
M3 - Journal article
C2 - 22650353
VL - 83
SP - 279
EP - 283
JO - Clinical Genetics
JF - Clinical Genetics
SN - 0009-9163
IS - 3
ER -
ID: 38488977