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- W2000778212 abstract "<b><i>Backgrounds/Aims:</i></b> Alzheimer's disease (AD) is one of the main types of dementia affecting about 50-55% of all demented patients. Sleep disturbances in AD patients are associated with the severity of dementia and are often the primary reason for institutionalization. These sleep problems partly resemble the core symptoms of narcolepsy, a sleep disorder caused by a general loss of the neurotransmitter hypocretin. The aim of our study was to investigate whether genetic variants in the hypocretin <i>(HCRT)</i> and in the hypocretin receptors 1 and 2 <i>(HCRTR1, HCRTR2)</i> genes could modify the occurrence and the clinical features of AD and to examine if these possible variants influence the role of the protein in sleep regulation. <b><i>Methods:</i></b> Using a case-control strategy, we genotyped 388 AD patients and 272 controls for 10 SNPs in the <i>HCRT</i>, <i>HCRTR1</i> and <i>HCRTR2</i> genes. In order to evaluate which residues belong to the HCRTR2 binding site, we built a molecular model. <b><i>Results:</i></b> The genotypic and allelic frequencies of the rs2653349 polymorphism were different (χ<sup>2</sup> = 5.77, p = 0.016; χ<sup>2</sup> = 6.728, p = 0.035) between AD patients and controls. The carriage of the G allele was associated with an increased AD risk (OR 2.53; 95% CI 1.10-5.80). No significant differences were found in the distribution of either genotypic or allelic frequencies between cases and controls in the <i>HCRTR1</i> polymorphisms rs2271933, rs10914456 and rs4949449 and in the <i>HCRTR2</i> polymorphism rs3122156. <b><i>Conclusion:</i></b> Our data support the hypothesis that the <i>HCRTR2</i> gene is likely to be a risk factor for AD. The increased risk inferred is quite small, but in the context of a multi-factorial disease, the presence of this polymorphism may significantly contribute to influencing the susceptibility for AD by interacting with other unknown genetic or environmental factors in sleep regulation." @default.
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- W2000778212 date "2014-01-01" @default.
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- W2000778212 title "Is HCRTR2 a Genetic Risk Factor for Alzheimer's Disease?" @default.
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- W2000778212 doi "https://doi.org/10.1159/000359964" @default.
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