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Neurobiol Aging. 2012 Aug;33(8):1846.e5-6. doi: 10.1016/j.neurobiolaging.2012.01.109. Epub 2012 Mar 10.

Analysis of the hexanucleotide repeat in C9ORF72 in Alzheimer's disease.

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Mental Health and Neurodegeneration Research Group, Faculty of Human and Medical Sciences, University of Manchester, AV Hill Building, Oxford Road, Manchester M13 9PT, UK.


Frontotemporal lobar degeneration (FTLD) is a highly familial neurodegenerative disease. It has recently been shown that the most common genetic cause of FTLD and amyotrophic lateral sclerosis (ALS) is a hexanucleotide repeat expansion in C9ORF72. To investigate whether this expansion was specific to the FTLD/ALS disease spectrum, we genotyped the hexanucleotide repeat region of C9ORF72 in a large cohort of patients with Alzheimer's disease (AD). A normal range of repeats was found in all cases. We conclude that the hexanucleotide repeat expansion is specific to the FTLD/ALS disease spectrum.

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