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This study investigated possible associations between selected polymorphisms in the serotonin receptor genes, 5-HT2A and 5-HT2C, with the presence of co-morbid depressive illness at baseline in a community based cohort of 158 patients with late onset patients with Alzheimer's disease (AD). An association was found between the presence of major depressive illness at baseline and both the 5-HT2A and 5-HT2C polymorphisms. Specifically, homozygous carriers of the 5-HT2A C102 allele were five times more likely to have major depressive illness than heterozygotes. In addition, homozygous or hemizygous carriers of the 5-HT2C Ser allele were 12 times more likely to have major depressive illness than homozygous or hemizygous carriers of the 5-HT2C Cys allele. © 2003 Wiley-Liss, Inc.

Type

Journal article

Journal

American Journal of Medical Genetics - Neuropsychiatric Genetics

Publication Date

15/05/2003

Volume

119 B

Pages

40 - 43