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Association of a CB1 Cannabinoid Receptor Gene (CNR1) polymorphism with severe alcohol dependence

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons50204

Hoehe,  Margret R.
Genetic Variation, Haplotypes, and Genetics of Complex Disease (Margret Hoehe), Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society;

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Citation

Schmidt, L. G., Samochowiec, J., Finckh, U., Fiszer-Piosik, E., Horodnicki, J., Wendel, B., et al. (2002). Association of a CB1 Cannabinoid Receptor Gene (CNR1) polymorphism with severe alcohol dependence. 3, 221-224.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-8C56-9
Abstract
Due to the involvement of the endogenous cannabinoid system in brain reward mechanisms a silent polymorphism (1359G/A; Thr453Thr) in the single coding exon of the CB1 human cannabinoid receptor gene (CNR1) was analysed in 121 severely affected Caucasian alcoholics and 136 most likely non-alcoholic controls. The observed frequency of the A allele was 31.2% for controls and 42.1% for alcoholics with severe withdrawal syndromes (P=0.010). Post-hoc exploration indicated that this allelic association resulted from an excess of the homozygous A/A genotype in patients with a history of alcohol delirium (P=0.031, DF 2), suggesting s an increased risk of delirium (OR=2.45, 95% CI 1.14–5.25). This finding suggests that the homozygous genotype CNR1 1359A/A confers vulnerability to alcohol withdrawal delirium.