Genetic clues to the molecular basis of tobacco addiction and progress towards personalized therapy
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Updated: Aug 19, 2026

Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration
Published on: February 10, 2012
R Walton1, E Johnstone, M Munafò
1Oxford University, Dept of Primary Health Care, Imperial Cancer Research Fund, General Practice Research Group, Institute of Health Sciences, Old Road, Headington, OX3 7LF, Oxford, UK. robert.walton@public-health.oxford.ac.uk
Abstract:
The molecular processes that underlie addiction are beginning to unfold. Genetically determined variations in dopaminergic neurotransmission predispose to nicotine dependence. In addition, tobacco use is likely to be governed by the rate at which smokers metabolize nicotine. Functional polymorphisms in CYTOCHROME P450 monooxygenases that metabolize nicotine have now been defined and it should soon be possible to identify fast nicotine metabolizers by DNA analysis. Here, we review the key neurotransmitter receptors and metabolic enzymes implicated in tobacco dependence. We explore the potential benefits of classifying smokers according to the molecular aetiology of their habit. One major benefit will be in planning effective strategies for smoking cessation. Methods of typing for alleles related to smoking behavior that might be suitable for use in clinical practice in the future will also be discussed
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