Abstract
Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder caused by CAG repeat expansion in the IT-15 gene coding for huntingtin. The mechanism of neuronal degeneration induced by the mutant huntingtin is not known. Apoptosis may play a role in it. Huntingtin is widely expressed in the cells, so abnormalities can be expected also in non-neural tissue. We examined the susceptibility of lymphocytes from HD patients, asymptomatic carriers and normal individuals to UVB irradiation-induced apoptosis. Lymphocytes from eight HD patients and two asymptomatic carriers showed increased apoptotic cell death compared to controls. Our results suggests that sensitivity of HD cells to induced apoptosis is not restricted to neurons.
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