Approaches to Sequence the HTT CAG Repeat Expansion and Quantify Repeat Length Variation

Abstract excerpt

BACKGROUND: Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder caused by the expansion of the HTT CAG repeat. Affected individuals inherit ≥36 repeats and longer alleles cause earlier onset, greater disease severity and faster disease progression. The HTT CAG repeat is genetically unstable in the soma in a process that preferentially generates somatic expansions, the proportion of which...

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