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Zellers S, van Dongen J, Maes HHM, Ollikainen M, Fang F, Vrieze S, Kaprio J, Boomsma DI. A Bivariate Twin Study of Lifetime cannabis Initiation and Lifetime Regular Tobacco Smoking Across Three Different Countries. Behav Genet 2024; 54:375-385. [PMID: 39078541 PMCID: PMC11371858 DOI: 10.1007/s10519-024-10190-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 07/23/2024] [Indexed: 07/31/2024]
Abstract
Regular cigarette smoking and cannabis consumption are strongly positively related to each other, yet few studies explore their underlying variation and covariation. We evaluated the genetic and environmental decomposition of variance and covariance of these two traits in twin data from three countries with different social norms and legislation. Data from the Netherlands Twin Register, FinnTwin12/16, and the Minnesota Center for Twin Family Research (total N = 21,617) were analyzed in bivariate threshold models of lifetime regular smoking initiation (RSI) and lifetime cannabis initiation (CI). We ran unstratified models and models stratified by sex and country. Prevalence of RSI was lowest in the Netherlands and prevalence of CI was highest in Minnesota. In the unstratified model, genetic (A) and common environmental factors (C) contributed substantially to the liabilities of RSI (A = 0.47, C = 0.34) and CI (A = 0.28, C = 0.51). The two liabilities were significantly phenotypically (rP = 0.56), genetically (rA = 0.74), and environmentally correlated in the unstratified model (rC = 0.47and rE = 0.48, representing correlations between common and unique environmental factors). The magnitude of phenotypic correlation between liabilities varied by country but not sex (Minnesota rP ~ 0.70, Netherlands rP ~ 0.59, Finland rP ~ 0.45). Comparisons of decomposed correlations could not be reliably tested in the stratified models. The prevalence and association of RSI and CI vary by sex and country. These two behaviors are correlated because there is genetic and environmental overlap between their underlying latent liabilities. There is heterogeneity in the genetic architecture of these traits across country.
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Affiliation(s)
- Stephanie Zellers
- Institute for Molecular Medicine Finland, University of Helsinki, P.O. Box 20, Helsinki, 00014, Finland.
| | - Jenny van Dongen
- Department of Biological Psychology, Vrije Universiteit, Amsterdam, The Netherlands
| | - Hermine H M Maes
- Virginia Institute for Psychiatric and Behavioral Genetics, Department of Human and Molecular Genetics, Psychiatry and Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Miina Ollikainen
- Institute for Molecular Medicine Finland, University of Helsinki, P.O. Box 20, Helsinki, 00014, Finland
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
| | - Fang Fang
- GenOmics and Translational Research Center, Research Triangle Institute International, Research Triangle Park, NC, USA
| | - Scott Vrieze
- Department of Psychology, University of Minnesota, Minneapolis, MN, USA
| | - Jaakko Kaprio
- Institute for Molecular Medicine Finland, University of Helsinki, P.O. Box 20, Helsinki, 00014, Finland
| | - Dorret I Boomsma
- Department of Biological Psychology, Vrije Universiteit, Amsterdam, The Netherlands
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Pocuca N, Chadi N, Vergunst F, Parent S, Côté SM, Boivin M, Tremblay RE, Séguin JR, Castellanos-Ryan N. Prospective Polysubstance use Profiles Among Adolescents with Early-onset Cannabis Use, and their Association with Cannabis Outcomes in Emerging Adulthood. Int J Ment Health Addict 2023. [DOI: 10.1007/s11469-022-01005-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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3
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Qi FY, Zhu ZH, Li M, Guan Y, Peng QY, Lu SM, Liu ZH, Wang MF, Miao MM, Chen ZY, Li XM, Bai J, Yao JH, Yao J. Genetic variations in the bitter taste receptor gene TAS2R38 are related to cigarette smoking behavior in Han Chinese smokers. Genes Genomics 2022; 44:1363-1374. [PMID: 36125655 DOI: 10.1007/s13258-022-01311-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 08/18/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Smoking behavior is influenced by multiple genes, including the bitter taste gene TAS2R38. It has been reported that the correlation between TAS2R38 and smoking behavior has ethnicity-based differences. However, the TAS2R38 status in Chinese smokers is still unclear. OBJECTIVE This study aims to investigate the possible relationship between genetic variations in TAS2R38 (A49P, V262A and I296V) and smoking behaviors in the Han Chinese population. METHODS The haplotype analyses were performed and smoking behavior questionnaire was completed by 1271 individuals. Genetic association analyses for smoking behavior were analyzed using chi-square test. Further, for investigating the molecular mechanism of TAS2R38 variants effect on smoking behavior, we conducted TAS2R38-PAV and TAS2R38-AVI expression plasmids and tested the cellular calcium assay by cigarette smoke compounds stimulus in HEK293. RESULTS Significant associations of genetic variants within TAS2R38 were identified with smoking behavior. We found a higher PAV/PAV frequency than AVI/AVI in moderate and high nicotine dependence (FTND ≥ 4; X2 = 4.611, 1 df, p = 0.032) and strong cigarette smoke flavor intensity preference (X2 = 4.5383, 1 df, p = 0.033) in participants. Furthermore, in the in vitro cellular calcium assay, total particle matter (TPM), N-formylnornicotine and cotinine, existing in cigarette smoke, activated TAS2R38-PAV but not TAS2R38-AVI-transfected cells. CONCLUSION Our data highlights that genetic variations in TAS2R38 are related to smoking behavior, especially nicotine dependence and cigarette smoke flavor intensity preference. Our findings may encourage further consideration of the taste process to identify individuals susceptible to nicotine dependence, particularly Han Chinese smokers.
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Affiliation(s)
- Fei-Yan Qi
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Zhou-Hai Zhu
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Meng Li
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Ying Guan
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Qi-Yuan Peng
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - She-Ming Lu
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Zhi-Hua Liu
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Ming-Feng Wang
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Ming-Ming Miao
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Zhang-Yu Chen
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Xue-Mei Li
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
| | - Jie Bai
- Medical Faculty, Kunming University of Science and Technology, Kunming, 650500, China
| | - Jian-Hua Yao
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China.
| | - Jianhua Yao
- Joint Institute of Tobacco and Health, Kunming, 650106, Yunnan, China
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4
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McClure EA, Rabin RA, Lee DC, Hindocha C. Treatment Implications Associated with Cannabis and Tobacco Co-Use. CURRENT ADDICTION REPORTS 2020; 7:533-544. [PMID: 33777645 PMCID: PMC7992053 DOI: 10.1007/s40429-020-00334-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2020] [Indexed: 12/31/2022]
Abstract
PURPOSE OF THE REVIEW The goal of this article is to summarize the treatment-focused literature on cannabis and tobacco co-use and the treatment implications of co-use. This review will focus on: 1) the impact of co-use on cessation outcomes, 2) compensatory use/substitution of the non-treated substance among co-users, and 3) treatment interventions to address co-use. This article will highlight the limitations to co-use captured in the literature and offer considerations and directives for co-use research and treatment moving forward. RECENT FINDINGS The degree to which co-use affects cessation for a single, targeted substance remains in question, as the literature is largely mixed. Cannabis treatment trials are better equipped to answer these questions given that they do not typically exclude tobacco users. While the relationship between tobacco use and poorer cannabis outcomes appears to have some evidence, the reverse relationship (cannabis use affecting tobacco outcomes) is not consistently supported. SUMMARY The co-use of cannabis and tobacco and its impact on single substance cessation and/or compensatory substance use during cessation is generally overlooked in treatment trials, while interventions to address both substances are rare. Capturing co-use adds burden for researchers, clinicians, and participants, but is warranted given the prevalence of co-use and a rapidly changing cannabis and tobacco regulatory environment, which may further complicate co-occurring substance use. Co-users are a heterogeneous population; trials focused on co-users, in addition to better data capture and consistent terminology, will aid in an understanding of nuanced patterns of co-use critical to inform treatment interventions.
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Affiliation(s)
- Erin A. McClure
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA
| | - Rachel A. Rabin
- Department of Psychiatry, McGill University and The Douglas Mental Health Institute, Montreal, Canada
| | - Dustin C. Lee
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chandni Hindocha
- Clinical Psychopharmacology Unit, Department of Clinical, Educational & Health Psychology, University College London, Faculty of Brain Sciences, University College London
- Translational Psychiatry Research Group, Research Department of Mental Health Neuroscience, Division of Psychiatry, Faculty of Brain Sciences, University College London
- University College Hospital National Institute of Health Research (NIHR) Biomedical Research Centre
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Wilhelm J, Abudayyeh H, Perreras L, Taylor R, Peters EN, Vandrey R, Hedeker D, Mermelstein R, Cohn A. Measuring the temporal association between cannabis and tobacco use among Co-using young adults using ecological momentary assessment. Addict Behav 2020; 104:106250. [PMID: 31918167 DOI: 10.1016/j.addbeh.2019.106250] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/11/2019] [Accepted: 12/02/2019] [Indexed: 01/10/2023]
Affiliation(s)
- Jess Wilhelm
- Battelle Memorial Institute, Public Health Center for Substance Use Research, 6115 Falls Rd., Baltimore, MD, 21209, United States.
| | - Haneen Abudayyeh
- Battelle Memorial Institute, Public Health Center for Substance Use Research, 6115 Falls Rd., Baltimore, MD, 21209, United States.
| | - Lexie Perreras
- Battelle Memorial Institute, Public Health Center for Substance Use Research, 6115 Falls Rd., Baltimore, MD, 21209, United States.
| | - Reddhyia Taylor
- Battelle Memorial Institute, Public Health Center for Substance Use Research, 6115 Falls Rd., Baltimore, MD, 21209, United States.
| | - Erica N Peters
- Battelle Memorial Institute, Public Health Center for Substance Use Research, 6115 Falls Rd., Baltimore, MD, 21209, United States.
| | - Ryan Vandrey
- Johns Hopkins University School of Medicine, Behavioral Pharmacology Research Unit, 5510 Nathan Shock Dr., Baltimore, MD 21224, United States.
| | - Donald Hedeker
- The University of Chicago, Department of Public Health Sciences, 5841 S. Maryland Ave., Rm. W-254, MC2000, Chicago, IL 60637, United States.
| | - Robin Mermelstein
- University of Illinois at Chicago, Institute for Health Research and Policy, Psychology Department, 1747 W. Roosevelt Rd. 544 WROB, MC 275, Chicago, IL 60607, United States.
| | - Amy Cohn
- University of Oklahoma Health Sciences Center, Oklahoma Tobacco Research Center, 655 Research Parkway, Suite 400, Oklahoma City, OK, 73104, United States.
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Prevalence of Some Genetic Risk Factors for Nicotine Dependence in Ukraine. GENETICS RESEARCH INTERNATIONAL 2019; 2019:2483270. [PMID: 31885928 PMCID: PMC6925678 DOI: 10.1155/2019/2483270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/22/2019] [Indexed: 11/17/2022]
Abstract
Tobacco smoking is known to be a strong risk factor for developing many diseases. The development and severity of smoking dependence results from interaction of environmental and lifestyle factors, psycho-emotional predispositions, and also from genetic susceptibility. In present study, we investigated polymorphic variants in genes contributed to nicotine dependence, as well as to increased impulsivity, known to be an important risk factor for substance use disorders, in Ukraine population. The genotype frequencies at CYP2A6, DNMT3B, DRD2, HTR2A, COMT, BDNF, GABRA2, CHRNA5, and DAT1 polymorphisms were determined in 171 Ukraine residents, and these data were compared with data for several other European populations and main ethnic groups. It has been found that genotype frequencies for all studied loci are in Hardy-Weinberg equilibrium in the Ukrainian population and correspond to the respective frequencies in European populations. These findings suggest a similar impact of these loci on nicotine dependence in Ukraine. Further studies with larger sample sizes are, however, needed to draw firm conclusions about the effect size of these polymorphisms.
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Yukseloglu EH, Ortug A, Rayimoglu G, Yonar FC, Erkan I, Kara U, Islek DS, Kolusayin Ozar MO, Dastan K, Karatas O. Association of 10 single nucleotide polymorphism loci with nicotine addiction in the Anatolian population? BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1637782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Emel Hulya Yukseloglu
- Department of Forensic Genetics, Institute of Forensic Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Alpen Ortug
- Department of Anatomy, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Gulten Rayimoglu
- Department of Forensic Genetics, Institute of Forensic Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Fatma Cavus Yonar
- Department of Forensic Genetics, Institute of Forensic Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Itir Erkan
- Department of Healthcare Management, Faculty of Health Sciences, Istanbul Yeni Yuzyil University, Istanbul, Turkey
| | - Umut Kara
- Department of Forensic Genetics, Institute of Forensic Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Dilek Salkim Islek
- Department of Forensic Genetics, Institute of Forensic Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Melek Ozlem Kolusayin Ozar
- Department of Forensic Medicine, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Kadir Dastan
- Department of Nutrition and Dietetic, Faculty of Health Sciences, Istanbul Yeni Yuzyil University, Istanbul, Turkey
| | - Omer Karatas
- Department of Forensic Genetics, Institute of Forensic Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
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Gorwood P, Le Strat Y, Ramoz N. Genetics of addictive behavior: the example of nicotine dependence. DIALOGUES IN CLINICAL NEUROSCIENCE 2018. [PMID: 29302221 PMCID: PMC5741107 DOI: 10.31887/dcns.2017.19.3/pgorwood] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The majority of addictive disorders have a significant heritability—roughly around 50%. Surprisingly, the most convincing association (a nicotinic acetylcholine receptor CHRNA5-A3-B4 gene cluster in nicotine dependence), with a unique attributable risk of 14%, was detected through a genome-wide association study (GWAS) on lung cancer, although lung cancer has a low heritability. We propose some explanations of this finding, potentially helping to understand how a GWAS strategy can be successful. Many endophenotypes were also assessed as potentially modulating the effect of nicotine, indirectly facilitating the development of nicotine dependence. Challenging the involved phenotype led to the demonstration that other potentially overlapping disorders, such as schizophrenia and Parkinson disease, could also be involved, and further modulated by parent monitoring or the existence of a smoking partner. Such a complex mechanism of action is compatible with a gene-environment interaction, most clearly explained by epigenetic factors, especially as such factors were shown to be, at least partly, genetically driven.
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Affiliation(s)
- Philip Gorwood
- INSERM U894, Center of Psychiatry and Neuroscience, Paris, France; University Paris-Descartes; Paris, France; Sainte-Anne Hospital (CMME), Paris, France
| | - Yann Le Strat
- INSERM U894, Center of Psychiatry and Neuroscience, Paris, France; Hopital Louis Mourier (AP-HP), Colombes, France
| | - Nicolas Ramoz
- INSERM U894, Center of Psychiatry and Neuroscience, Paris, France; University Paris-Descartes
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Schauer GL, King BA, McAfee TA. Prevalence, correlates, and trends in tobacco use and cessation among current, former, and never adult marijuana users with a history of tobacco use, 2005-2014. Addict Behav 2017; 73:165-171. [PMID: 28525833 DOI: 10.1016/j.addbeh.2017.04.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 04/25/2017] [Accepted: 04/28/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Approximately 70% of current (past 30-day) adult marijuana users are current tobacco users, which may complicate tobacco cessation. We assessed prevalence and trends in tobacco cessation among adult ever tobacco users, by marijuana use status. METHODS Data came from the National Survey on Drug Use and Health, a cross-sectional, nationally representative, household survey of U.S. civilians. Analyses included current, former, and never marijuana users aged≥18 reporting ever tobacco use (cigarette, cigar, chew/snuff). We computed weighted estimates (2013-2014) of current tobacco use, recent tobacco cessation (quit 30days to 12months), and sustained tobacco cessation (quit>12months) and adjusted trends in tobacco use and cessation (2005-2014) by marijuana use status. We also assessed the association between marijuana and tobacco use status. RESULTS In 2013-2014, among current adult marijuana users reporting ever tobacco use, 69.1% were current tobacco users (vs. 38.5% of former marijuana users, p<0.0001, and 28.2% of never marijuana users, p<0.0001); 9.1% reported recent tobacco cessation (vs. 8.4% of former marijuana users, p<0.01, and 6.3% of never marijuana users, p<0.001), and 21.8% reported sustained tobacco cessation (vs. 53.1% of former marijuana users, p<0.01, and 65.5% of never marijuana users, p<0.0001). Between 2005 and 2014, current tobacco use declined and sustained tobacco cessation increased among all marijuana use groups. CONCLUSIONS Current marijuana users who ever used tobacco had double the prevalence (vs. never-marijuana users) of current tobacco use, and significantly lower sustained abstinence. Interventions addressing tobacco cessation in the context of use of marijuana and other substances may be warranted.
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Affiliation(s)
- Gillian L Schauer
- Department of Health Services, School of Public Health, University of Washington, United States; CDC Foundation, 600 Peachtree Street NE, Suite 1000, Atlanta, GA, 30308, United States.
| | - Brian A King
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, United States
| | - Timothy A McAfee
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, United States
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10
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Agrawal A, Grant JD, Lynskey MT, Madden PAF, Heath AC, Bucholz KK, Sartor CE. The genetic relationship between cannabis and tobacco cigarette use in European- and African-American female twins and siblings. Drug Alcohol Depend 2016; 163:165-71. [PMID: 27114204 PMCID: PMC4904709 DOI: 10.1016/j.drugalcdep.2016.04.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 04/06/2016] [Accepted: 04/11/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND Use of cigarettes and cannabis frequently co-occurs. We examine the role of genetic and environmental influences on variation in and covariation between tobacco cigarette and cannabis use across European-American (EA) and African-American (AA) women. METHODS Data on lifetime cannabis and cigarette use were drawn from interviews of 956 AA and 3557 EA young adult female twins and non-twin same sex female full siblings. Twin modeling was used to decompose variance in and covariance between cigarette and cannabis use into additive genetic, shared, special twin and non-shared environmental sources. RESULTS Cigarette use was more common in EAs (75.3%, 95% C.I. 73.8-76.7%) than AAs (64.2%, 95% C.I. 61.2-67.2%) while cannabis use was marginally more commonly reported by AAs (55.5%, 95% C.I. 52.5-58.8%) than EAs (52.4%, 95% C.I. 50.7-54.0%). Additive genetic factors were responsible for 43-66% of the variance in cigarette and cannabis use. Broad shared environmental factors (shared+special twin) played a more significant role in EA (23-29%) than AA (2-15%) women. In AA women, the influence of non-shared environment was more pronounced (42-45% vs. 11-19% in EA women). There was strong evidence for the same familial influences underlying use of both substances (rA=0.82-0.89; rC+T=0.70-0.75). Non-shared environmental factors were also correlated but less so (rE=0.48-0.66). No racial/ethnic differences were apparent in these sources of covariation. CONCLUSION Heritability of cigarette and cannabis use is comparable across racial/ethnic groups. Differences in the contribution of shared and non-shared environmental influences indicate that different factors may shape substance use in EA and AA women.
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Affiliation(s)
- Arpana Agrawal
- Washington University School of Medicine, Department of Psychiatry, 660 S. Euclid, CB 8134, Saint Louis, MO 63110, USA.
| | - Julia D Grant
- Washington University School of Medicine, Department of Psychiatry, 660 S. Euclid, CB 8134, Saint Louis, MO 63110, USA
| | | | - Pamela A F Madden
- Washington University School of Medicine, Department of Psychiatry, 660 S. Euclid, CB 8134, Saint Louis, MO 63110, USA
| | - Andrew C Heath
- Washington University School of Medicine, Department of Psychiatry, 660 S. Euclid, CB 8134, Saint Louis, MO 63110, USA
| | - Kathleen K Bucholz
- Washington University School of Medicine, Department of Psychiatry, 660 S. Euclid, CB 8134, Saint Louis, MO 63110, USA
| | - Carolyn E Sartor
- Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
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Bogdan R, Winstone JMA, Agrawal A. Genetic and Environmental Factors Associated with Cannabis Involvement. CURRENT ADDICTION REPORTS 2016; 3:199-213. [PMID: 27642547 PMCID: PMC5019486 DOI: 10.1007/s40429-016-0103-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Approximately 50-70% of the variation in cannabis use and use disorders can be attributed to heritable factors. For cannabis use, the remaining variance can be parsed in to familial and person-specific environmental factors while for use disorders, only the latter contribute. While numerous candidate gene studies have identified the role of common variation influencing liability to cannabis involvement, replication has been elusive. To date, no genomewide association study has been sufficiently powered to identify significant loci. Despite this, studies adopting polygenic techniques and integrating genetic variation with neural phenotypes and measures of environmental risk, such as childhood adversity, are providing promising new leads. It is likely that the small effect sizes associated with variants related to cannabis involvement will only be robustly identified in substantially larger samples. Results of such large-scale efforts will provide valuable single variant targets for translational research in neurogenetic, pharmacogenetic and non-human animal models as well as polygenic risk indices that can be used to explore a host of other genetic hypotheses related to cannabis use and misuse.
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Affiliation(s)
- Ryan Bogdan
- BRAIN lab, Department of Psychological and Brain Sciences, Washington University in St. Louis
| | - Jonathan MA Winstone
- BRAIN lab, Department of Psychological and Brain Sciences, Washington University in St. Louis
| | - Arpana Agrawal
- Department of Psychiatry, Washington University in St Louis, St Louis, Missouri
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