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Title: Copy-number variation of the neuronal glucose transporter gene SLC2A3 and age of onset in Huntington's disease
Authors: Vittori, Angelica
Breda, Carlo
Repici, Mariaelena
Orth, Michael
Roos, Raymund A. C.
Outeiro, Tiago F.
Giorgini, Flaviano
Hollox, Edward J.
REGISTRY investigators of the European Huntington's Disease Network
First Published: 22-Jan-2014
Publisher: Oxford University Press (OUP)
Citation: Human Molecular Genetics, 2014, 23 (12), pp. 3129-3137
Abstract: Huntington's disease (HD) is a devastating neurodegenerative disorder which is inherited in an autosomal dominant manner. HD is caused by a trinucleotide CAG repeat expansion that encodes a polyglutamine stretch in the huntingtin (HTT) protein. Mutant HTT expression leads to a myriad of cellular dysfunctions culminating in neuronal loss and consequent motor, cognitive and psychiatric disturbances in HD patients. The length of the CAG repeat is inversely correlated with age of onset (AO) in HD patients, while environmental and genetic factors can further modulate this parameter. Here, we explored whether the recently described copy-number variation (CNV) of the gene SLC2A3-which encodes the neuronal glucose transporter GLUT3-could modulate AO in HD. Strikingly, we found that increased dosage of SLC2A3 delayed AO in an HD cohort of 987 individuals, and that this correlated with increased levels of GLUT3 in HD patient cells. To our knowledge this is the first time that CNV of a candidate gene has been found to modulate HD pathogenesis. Furthermore, we found that increasing dosage of Glut1-the Drosophila melanogaster homologue of this glucose transporter-ameliorated HD-relevant phenotypes in fruit flies, including neurodegeneration and life expectancy. As alterations in glucose metabolism have been implicated in HD pathogenesis, this study may have important therapeutic relevance for HD.
DOI Link: 10.1093/hmg/ddu022
ISSN: 0964-6906
eISSN: 1460-2083
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © The Author 2014. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Appears in Collections:Published Articles, Dept. of Genetics

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