Genome-wide association of the laboratory-based nicotine metabolite ratio in three ancestries

JW Baurley, CK Edlund, CI Pardamean… - Nicotine & tobacco …, 2016 - academic.oup.com
Introduction: Metabolic enzyme variation and other patient and environmental characteristics
influence smoking behaviors, treatment success, and risk of related disease. Population …

Analyses of nicotine metabolism biomarker genetics stratified by sex in African and European Americans

MJ Chenoweth, LS Cox, NL Nollen, JS Ahluwalia… - Scientific Reports, 2021 - nature.com
Nicotine is inactivated by the polymorphic CYP2A6 enzyme to cotinine and then to 3′
hydroxycotinine. The Nicotine Metabolite Ratio (NMR; 3′ hydroxycotinine/cotinine) is a …

Genome‐wide association study of a nicotine metabolism biomarker in African American smokers: impact of chromosome 19 genetic influences

MJ Chenoweth, JJ Ware, AZX Zhu, CB Cole, LS Cox… - …, 2018 - Wiley Online Library
Background and aims The activity of CYP2A6, the major nicotine‐inactivating enzyme, is
measurable in smokers using the nicotine metabolite ratio (NMR; 3′ hydroxycotinine …

Genome-wide association meta-analysis of nicotine metabolism and cigarette consumption measures in smokers of European descent

J Buchwald, MJ Chenoweth, T Palviainen, G Zhu… - Molecular …, 2021 - nature.com
Smoking behaviors, including amount smoked, smoking cessation, and tobacco-related
diseases, are altered by the rate of nicotine clearance. Nicotine clearance can be estimated …

Transferability of ancestry‐specific and cross‐ancestry CYP2A6 activity genetic risk scores in African and European Populations

A El‐Boraie, MJ Chenoweth, JG Pouget… - Clinical …, 2021 - Wiley Online Library
The Nicotine Metabolite Ratio (NMR; 3‐hydroxycotinine/cotinine), a highly heritable index of
nicotine metabolic inactivation by the CYP2A6 enzyme, is associated with numerous …

Multiethnic prediction of nicotine biomarkers and association with nicotine dependence

AW Bergen, CS McMahan, S McGee… - Nicotine and …, 2021 - academic.oup.com
Introduction The nicotine metabolite ratio and nicotine equivalents are measures of
metabolism rate and intake. Genome-wide prediction of these nicotine biomarkers in …

A genome-wide association study of a biomarker of nicotine metabolism

A Loukola, J Buchwald, R Gupta, T Palviainen… - PLoS …, 2015 - journals.plos.org
Individuals with fast nicotine metabolism typically smoke more and thus have a greater risk
for smoking-induced diseases. Further, the efficacy of smoking cessation pharmacotherapy …

Evaluation of a weighted genetic risk score for the prediction of biomarkers of CYP2A6 activity

A El‐Boraie, T Taghavi, MJ Chenoweth… - Addiction …, 2020 - Wiley Online Library
The nicotine metabolite ratio (NMR; 3‐hydroxycotinine/cotinine) is an index of CYP2A6
activity. CYP2A6 is responsible for nicotine's metabolic inactivation and variation in the …

Variation in CYP2A6 and nicotine metabolism among two American Indian tribal groups differing in smoking patterns and risk for tobacco-related cancer

JA Tanner, JA Henderson, D Buchwald… - Pharmacogenetics …, 2017 - journals.lww.com
Objective The Northern Plains (NP) and Southwest (SW) American Indian populations differ
in their smoking patterns and lung cancer incidence. We aimed to compare CYP2A6 genetic …

Novel CYP2A6 diplotypes identified through next-generation sequencing are associated with in-vitro and in-vivo nicotine metabolism

JA Tanner, AZ Zhu, KG Claw, B Prasad… - Pharmacogenetics …, 2018 - journals.lww.com
Objectives Smoking patterns and cessation rates vary widely across smokers and can be
influenced by variation in rates of nicotine metabolism [ie cytochrome P450 2A6 (CYP2A6) …