Abstract
In the present study we aimed to determine the prevalence of . C9ORF72 GGGGCC hexanucleotide expansion in our cohort of 53 frontotemporal lobar degeneration (FTLD) patients and 174 neurologically normal controls. We identified the hexanucleotide repeat, in the pathogenic range, in 4 (2 bv-frontotemporal dementia (FTD) and 2 FTD-amyotrophic lateral sclerosis [ALS]) out of 53 patients and 1 neurologically normal control. Interestingly, 2 of the . C9ORF72 expansion carriers also carried 2 novel missense mutations in . GRN (Y294C) and in . PSEN-2(I146V). Further, 1 of the . C9ORF72 expansion carriers, for whom pathology was available, showed amyloid plaques and tangles in addition to TAR (trans-activation response) DNA-binding protein (TDP)-43 pathology. In summary, our findings suggest that the hexanucleotide expansion is probably associated with ALS, FTD, or FTD-ALS and occasional comorbid conditions such as Alzheimer's disease. These findings are novel and need to be cautiously interpreted and most importantly replicated in larger numbers of samples.
Original language | English (US) |
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Pages (from-to) | 1850.e1-1850.e11 |
Journal | Neurobiology of Aging |
Volume | 33 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2012 |
Keywords
- Alzheimer's disease
- Bv-FTD
- C9ORF72
- FTD-ALS
- FTLD
- GRN
- PSEN-2
ASJC Scopus subject areas
- Neuroscience(all)
- Aging
- Clinical Neurology
- Developmental Biology
- Geriatrics and Gerontology