ArticleMolecular psychiatry2025
Fine-mapping the CYP2A6 regional association with nicotine metabolism among African American smokers.
Article in Molecular psychiatry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Article
- Nicotine metabolite ratio and clinically significant depressive symptoms in U.S. adults: A smoker-specific association.Medicine · 2026Observational
- Nicotine Metabolism and Chronic Obstructive Pulmonary Disease: Mendelian Randomization and Phenotypic Characterization Analysis.International journal of chronic obstructive pulmonary disease · 2026Article
- Physiologically Based Pharmacokinetic Modeling to Predict Nicotine Pharmacokinetics of Nicotine Pouches Under Naturalistic Use Conditions.Journal of clinical pharmacology · 2025Article
Corrections and comments
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Authors and funding
12 authors.
Funding
Abstract
The nicotine metabolite ratio (NMR; 3'hydroxycotinine/cotinine) is a stable biomarker for CYP2A6 enzyme activity and nicotine clearance, with demonstrated clinical utility in personalizing smoking cessation treatment. Common genetic variation in the CYP2A6 region is strongly associated with NMR in smokers. Here, we investigated this regional association in more detail. We evaluated the association of CYP2A6 single-nucleotide polymorphisms (SNPs) and * alleles with NMR among African American smokers (N = 953) from two clinical trials of smoking cessation. Stepwise conditional analysis and Bayesian fine-mapping were undertaken. Putative causal variants were incorporated into an existing African ancestry-specific genetic risk score (GRS) for NMR, and the performance of the updated GRS was evaluated in both African American (n = 953) and European ancestry smokers (n = 933) from these clinical trials. Five independent associations with NMR in the CYP2A6 region were identified using stepwise conditional analysis, including the deletion variant CYP2A6*4 (beta = -0.90, p = 1.55 × 10
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