Gene-based analysis suggests association of the nicotinic acetylcholine receptor beta1 subunit (CHRNB1) and M1 muscarinic acetylcholine receptor (CHRM1) with vulnerability for nicotine dependence.

Abstract excerpt

Based on our previously identified linkage regions for nicotine dependence (ND), we selected six and five single nucleotide polymorphisms (SNPs) in the muscarinic cholinergic receptor subtype M1 (CHRM1) and nicotinic cholinergic receptor beta1 (CHRNB1), respectively, to determine the association of the two genes with ND in a total of 2,037 subjects from 602 nuclear families of either African-American (AA) or...

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