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Cinciripini PM, Wetter DW, Wang J, Yu R, Kypriotakis G, Kumar T, Robinson JD, Cui Y, Green CE, Bergen AW, Kosten TR, Scherer SE, Shete S. Deep sequencing of candidate genes identified 14 variants associated with smoking abstinence in an ethnically diverse sample. Sci Rep 2024; 14:6385. [PMID: 38493193 PMCID: PMC10944542 DOI: 10.1038/s41598-024-56750-7] [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: 07/18/2023] [Accepted: 03/11/2024] [Indexed: 03/18/2024] Open
Abstract
Despite the large public health toll of smoking, genetic studies of smoking cessation have been limited with few discoveries of risk or protective loci. We investigated common and rare variant associations with success in quitting smoking using a cohort from 8 randomized controlled trials involving 2231 participants and a total of 10,020 common and 24,147 rare variants. We identified 14 novel markers including 6 mapping to genes previously related to psychiatric and substance use disorders, 4 of which were protective (CYP2B6 (rs1175607105), HTR3B (rs1413172952; rs1204720503), rs80210037 on chr15), and 2 of which were associated with reduced cessation (PARP15 (rs2173763), SCL18A2 (rs363222)). The others mapped to areas associated with cancer including FOXP1 (rs1288980) and ZEB1 (rs7349). Network analysis identified significant canonical pathways for the serotonin receptor signaling pathway, nicotine and bupropion metabolism, and several related to tumor suppression. Two novel markers (rs6749438; rs6718083) on chr2 are flanked by genes associated with regulation of bodyweight. The identification of novel loci in this study can provide new targets of pharmacotherapy and inform efforts to develop personalized treatments based on genetic profiles.
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Affiliation(s)
- Paul M Cinciripini
- Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - David W Wetter
- Department of Department of Population Health Sciences, University of Utah and Huntsman Cancer Institute, Salt Lake City, Utah, 84112, USA
| | - Jian Wang
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Robert Yu
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - George Kypriotakis
- Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - Tapsi Kumar
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Jason D Robinson
- Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yong Cui
- Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Charles E Green
- Department of Pediatrics, The University of Texas Medical School at Houston, Houston, TX, 77030, USA
| | | | - Thomas R Kosten
- Department of Psychiatry, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Steven E Scherer
- Department of Molecular and Human Genetics, Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Sanjay Shete
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
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Hall W, Gartner C, Morphett K. How has the brain disease model of addiction contributed to tobacco control? Drug Alcohol Depend 2023; 253:111033. [PMID: 38006672 DOI: 10.1016/j.drugalcdep.2023.111033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 10/09/2023] [Accepted: 11/13/2023] [Indexed: 11/27/2023]
Abstract
Our paper evaluates the extent to which the brain disease model of addiction (BDMA) has contributed to reducing the prevalence of tobacco smoking and tobacco-related harm over the past 20 years. We discuss the ways in which genetic and neuroscience research on nicotine addiction have contributed to our understanding of tobacco smoking. We then examine the extent to which the BDMA has produced more effective treatments to assist smoking cessation. We also assess the degree to which the BDMA has contributed to the tobacco control policies that have produced substantial reductions in tobacco-related morbidity and mortality in the two decades since the model was first proposed by Alan Leshner. We also assess whether the BDMA has reduced the stigmatisation of people who smoke tobacco.
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Affiliation(s)
- Wayne Hall
- The National Centre for Youth Substance Use Research, the University of Queensland, Australia.
| | - Coral Gartner
- The School of Public Health, The University of Queensland, Australia
| | - Kylie Morphett
- The School of Public Health, The University of Queensland, Australia
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3
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Álvarez Mavárez JD, Mirambeaux Villalona RM, Raboso Moreno B, Segrelles Calvo G, Cabrera César E, de Higes-Martínez EB. [Questions and Answers in Tobacco Smoking]. OPEN RESPIRATORY ARCHIVES 2023; 5:100230. [PMID: 37497250 PMCID: PMC10369620 DOI: 10.1016/j.opresp.2022.100230] [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: 10/11/2022] [Accepted: 12/19/2022] [Indexed: 01/05/2023] Open
Abstract
Smoking is an addictive, chronic and relapsing disease that, due to its high prevalence, morbidity and mortality, has become one of the main public health problems worldwide, affecting both smokers and rest of population involuntarily exposed to smoke tobacco.To overcome this pandemic, it is essential that all health professionals intervene on the problem in a manner adapted to their level of care, from giving brief advice for stop smoking to proposing intensive cognitive-behavioral and pharmacological treatment.Smoking cessation treatments have proven to be safe and effective, but unfortunately, the personal and economic resources dedicated to smoker care are not proportional to the magnitude of the problem, with few specialized consultations and lack of funding for pharmacological treatments.In addition, we must confront the arguments of the tobacco industry that interferes in the fight against smoking with new products that they pretend to offer as «harm reduction strategies» when really it is their way of attracting new addicts to tobacco products.
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Affiliation(s)
| | | | | | | | - Eva Cabrera César
- Servicio de Neumología, Hospital Universitario Virgen de la Victoria, Málaga, España
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Mappangara I, Yusuf I, Aspar Mappahya A, Qanitha A. CYP2A6 gene polymorphism and severity of coronary atherosclerosis in Indonesian male smokers: A pilot study. Medicine (Baltimore) 2022; 101:e30308. [PMID: 36123879 PMCID: PMC9478272 DOI: 10.1097/md.0000000000030308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Nicotine is a toxic alkaloid known to be responsible for the addictive feature of cigarettes. CYP2A6 genetic polymorphism among individuals was suspected to explain the relationship between cigarette smoking and related diseases. CYP2A6 works to slow nicotine metabolism and thus maintain a more prolonged nicotine concentration and increase nicotine exposure to the blood. We aimed to investigate the correlation between the CYP2A6 gene with the severity of coronary atherosclerosis. This cross-sectional study was conducted from April to July 2010 in Makassar Cardiac Centre, Dr Wahidin Sudirohusodo Hospital, Indonesia. Sixty-four male active smokers at the age of ≥45 years, diagnosed with coronary artery disease (CAD), were recruited and asked to smoke the usual number of cigarettes in the last 1 month prior to blood collection for CYP2A6 genotyping. Spearman correlation was performed to analyze the association between the allele variants and coronary stenosis degree, adjusted for CAD risk factors. Furthermore, we estimated the risk ratio to quantify the correlation. Of the 64 male smokers with CAD, the mean duration of smoking was 36.9 ± 8.6 years, and 49 (76.6%) were heavy smokers with >20 cigarettes per day. All 128 alleles were observed. Our results showed that all participants with CYP2A6 variants had a significant correlation with severe coronary artery stenosis (P = .006). Thus, this study suggests that the mutant CYP2A6 gene allele significantly increased the risk of having severe coronary stenosis 1.2 times higher compared to the wild type. This pilot study showed that CYP2A6 gene has an influential role in atherosclerotic development in male smokers. However, our findings should be confirmed with further more extensive studies.
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Affiliation(s)
- Idar Mappangara
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
| | - Irawan Yusuf
- Department of Physiology, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
| | - Ali Aspar Mappahya
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
| | - Andriany Qanitha
- Department of Cardiology and Vascular Medicine, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
- Department of Physiology, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
- Doctoral Study Program, Faculty of Medicine, Hasanuddin University, Makassar, Indonesia
- *Correspondence: Andriany Qanitha, Faculty of Medicine Hasanuddin University, Makassar 90245, Indonesia (e-mail: )
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Goldberg LR, Gould TJ. "Genetic influences impacting nicotine use and abuse during adolescence: insights from human and rodent studies". Brain Res Bull 2022; 187:24-38. [PMID: 35738503 DOI: 10.1016/j.brainresbull.2022.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/18/2022] [Accepted: 06/14/2022] [Indexed: 11/30/2022]
Abstract
Nicotine use continues to be a major public health concern, with an alarming recent rise in electronic cigarette consumption. Heritability estimates of nicotine use and abuse range from 40-80%, providing strong evidence that genetic factors impact nicotine addiction-relevant phenotypes. Although nicotine use during adolescence is a key factor in the development of addiction, it remains unclear how genetic factors impact adolescent nicotine use and abuse. This review will discuss studies investigating genetic factors impacting nicotine use during adolescence. Evidence from both rodent and human studies will be summarized and integrated when possible. Human adolescent studies have largely included candidate gene studies for genes identified in adult populations, such as genes involved in nicotine metabolism, nicotinic acetylcholine receptor signaling, dopaminergic signaling, and other neurotransmitter signaling systems. Alternatively, rodent studies have largely taken a discovery-based approach identifying strain differences in adolescent nicotine addiction-relevant behaviors. Here, we aim to answer the following three questions by integrating human and rodent findings: 1) Are there genetic variants that uniquely impact nicotine use during adolescence? 2) Are there genetic variants that impact both adolescent and adult nicotine use? and 3) Do genetic factors in adolescence significantly impact long-term consequences of adolescent nicotine use? Determining answers for these three questions will be critical for the development of preventative measures and treatments for adolescent nicotine use and addiction.
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Affiliation(s)
- Lisa R Goldberg
- Department of Biobehavioral Heatlh, Pennsylvania State University, University Park, PA, USA
| | - Thomas J Gould
- Department of Biobehavioral Heatlh, Pennsylvania State University, University Park, PA, USA.
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Bakhshaie J, Rogers AH, Kauffman BY, Fasteau M, Buckner JD, Schmidt NB, Zvolensky MJ. Situational fears: Association with negative affect-related smoking cognition among treatment seeking smokers. Addict Behav 2018; 85:158-163. [PMID: 29907345 PMCID: PMC6460920 DOI: 10.1016/j.addbeh.2018.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 05/15/2018] [Accepted: 06/07/2018] [Indexed: 01/18/2023]
Abstract
Despite the consistent clinically-significant relation between smoking and anxiety and its disorders, there is limited understanding of how specific fears relate to smoking processes. To isolate therapeutic targets for smoking-anxiety treatment development, there is a need to identify the underlying situational fears most related to smoking processes. Thus, the present study examined the association between interoceptive, agoraphobic, and social fears in terms of clinically significant negative affect-related smoking cognitions including negative affect reduction expectancies, coping motives, and perceived internal barriers to cessation. Participants were 469 treatment seeking smokers (48.2% female, Mage = 36.59, SD = 13.58) enrolled in a smoking cessation trial and completed baseline measures of smoking cognitions and situational fears. Results indicated that the there was a significant effect for social fears, relative to interoceptive and agoraphobic fears, for each of the studied clinically relevant smoking variables. Overall, this study offers initial empirical evidence that social fears are significantly and consistently related to several clinically-significant types of smoking cognition.
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Affiliation(s)
- Jafar Bakhshaie
- Department of Psychology, University of Houston, Houston, TX, United States
| | - Andrew H Rogers
- Department of Psychology, University of Houston, Houston, TX, United States
| | - Brooke Y Kauffman
- Department of Psychology, University of Houston, Houston, TX, United States
| | | | - Julia D Buckner
- Department of Psychology, Louisiana State University, LA, United States
| | - Norman B Schmidt
- Department of Psychology, Florida State University, Tallahassee, FL, United States
| | - Michael J Zvolensky
- Department of Psychology, University of Houston, Houston, TX, United States; Department of Behavioral Sciences, University of Texas MD Anderson Cancer Center, Houston, TX, United States.
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7
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Rajabi A, Khosravi P, Motevalian SA, Farjam M, Shojaei A. The association between polymorphism of the BDNF
gene and cigarette smoking in the Iranian population. J Gene Med 2018; 20:e3052. [DOI: 10.1002/jgm.3052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 07/24/2018] [Accepted: 08/10/2018] [Indexed: 11/11/2022] Open
Affiliation(s)
- Abdolhalim Rajabi
- Department of Epidemiology, Faculty of Public Health; Iran University of Medical Sciences; Tehran Iran
| | - Pedram Khosravi
- Medical Genetic Laboratory, Shahid Akbarabadi Hospital; Iran University of Medical Sciences; Tehran Iran
| | - Seyed Abbas Motevalian
- Department of Epidemiology, Faculty of Public Health; Iran University of Medical Sciences; Tehran Iran
| | - Mojtaba Farjam
- Noncommunicable Diseases Research Center; Fasa University of Medical Sciences; Fasa Iran
| | - Azadeh Shojaei
- Department of Medical Genetics and Molecular Biology, Faculty of Medicine; Iran University of Medical Sciences; Tehran Iran
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8
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Prom-Wormley EC, Ebejer J, Dick DM, Bowers MS. The genetic epidemiology of substance use disorder: A review. Drug Alcohol Depend 2017; 180:241-259. [PMID: 28938182 PMCID: PMC5911369 DOI: 10.1016/j.drugalcdep.2017.06.040] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 06/20/2017] [Accepted: 06/23/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND Substance use disorder (SUD) remains a significant public health issue. A greater understanding of how genes and environment interact to regulate phenotypes comprising SUD will facilitate directed treatments and prevention. METHODS The literature studying the neurobiological correlates of SUD with a focus on the genetic and environmental influences underlying these mechanisms was reviewed. Results from twin/family, human genetic association, gene-environment interaction, epigenetic literature, phenome-wide association studies are summarized for alcohol, nicotine, cannabinoids, cocaine, and opioids. RESULTS There are substantial genetic influences on SUD that are expected to influence multiple neurotransmission pathways, and these influences are particularly important within the dopaminergic system. Genetic influences involved in other aspects of SUD etiology including drug processing and metabolism are also identified. Studies of gene-environment interaction emphasize the importance of environmental context in SUD. Epigenetic studies indicate drug-specific changes in gene expression as well as differences in gene expression related to the use of multiple substances. Further, gene expression is expected to differ by stage of SUD such as substance initiation versus chronic substance use. While a substantial literature has developed for alcohol and nicotine use disorders, there is comparatively less information for other commonly abused substances. CONCLUSIONS A better understanding of genetically-mediated mechanisms involved in the neurobiology of SUD provides increased opportunity to develop behavioral and biologically based treatment and prevention of SUD.
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Affiliation(s)
- Elizabeth C Prom-Wormley
- Dvision of Epidemiology, Department of Family Medicine and Population Health, Virginia Commonwealth University, PO Box 980212, Richmond, VA 23298-0212, USA.
| | - Jane Ebejer
- School of Cognitive Behavioural and Social Sciences, University of New England, Armidale, NSW 2350, Australia
| | - Danielle M Dick
- Department of Psychology, Virginia Commonwealth University, PO Box 842509, Richmond, VA 23284-2509, USA
| | - M Scott Bowers
- Faulk Center for Molecular Therapeutics, Biomedical Engeneering, Northwestern University, Evanston, IL 60201, USA
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Koob GF, Volkow ND. Neurobiology of addiction: a neurocircuitry analysis. Lancet Psychiatry 2016; 3:760-773. [PMID: 27475769 PMCID: PMC6135092 DOI: 10.1016/s2215-0366(16)00104-8] [Citation(s) in RCA: 1800] [Impact Index Per Article: 225.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 03/09/2016] [Accepted: 03/11/2016] [Indexed: 12/17/2022]
Abstract
Drug addiction represents a dramatic dysregulation of motivational circuits that is caused by a combination of exaggerated incentive salience and habit formation, reward deficits and stress surfeits, and compromised executive function in three stages. The rewarding effects of drugs of abuse, development of incentive salience, and development of drug-seeking habits in the binge/intoxication stage involve changes in dopamine and opioid peptides in the basal ganglia. The increases in negative emotional states and dysphoric and stress-like responses in the withdrawal/negative affect stage involve decreases in the function of the dopamine component of the reward system and recruitment of brain stress neurotransmitters, such as corticotropin-releasing factor and dynorphin, in the neurocircuitry of the extended amygdala. The craving and deficits in executive function in the so-called preoccupation/anticipation stage involve the dysregulation of key afferent projections from the prefrontal cortex and insula, including glutamate, to the basal ganglia and extended amygdala. Molecular genetic studies have identified transduction and transcription factors that act in neurocircuitry associated with the development and maintenance of addiction that might mediate initial vulnerability, maintenance, and relapse associated with addiction.
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Affiliation(s)
- George F Koob
- National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD, USA.
| | - Nora D Volkow
- National Institute on Drug Abuse, National Institutes of Health, Rockville, MD, USA
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Ferguson SG, Shiffman S, Dunbar M, Schüz N. Higher stimulus control is associated with less cigarette intake in daily smokers. PSYCHOLOGY OF ADDICTIVE BEHAVIORS 2016; 30:229-37. [PMID: 26766542 PMCID: PMC4801779 DOI: 10.1037/adb0000149] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
It is well established that environmental stimuli influence smoking in light, and to a lesser degree, heavy smokers. A 2-factor model of dependence suggests that the influence of stimulus control is masked among heavier smokers who primarily smoke for nicotine maintenance. The current study aimed to assess the influence of stimulus control across a range of moderate to heavy daily smokers. Furthermore, as local tobacco control policies may change the role of stimulus control, the study aimed to replicate previous U.S. findings on stimulus control in an Australian setting marked by strong tobacco control policies. In 2 Ecological Momentary Assessment studies, 420 participants monitored antecedents of smoking and nonsmoking situations. In a set of idiographic logistic regression analyses, situational antecedents were used to predict smoking occasions within each individual's data. Linear regression analysis was used to test for the association between stimulus control and smoking rate, and to test for differences between the 2 samples. Daily smokers' smoking was under considerable stimulus control, which was weaker at higher smoking rates. Overall, there was greater stimulus control in the Australian sample. Daily smokers also experience a degree of stimulus control, which is less influential in heavier smokers.
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Affiliation(s)
| | - Saul Shiffman
- University of Pittsburgh, Pittsburgh, PA, United States
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11
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Leone FT, Carlsen KH, Folan P, Latzka K, Munzer A, Neptune E, Pakhale S, Sachs DPL, Samet J, Upson D, White A. An Official American Thoracic Society Research Statement: Current Understanding and Future Research Needs in Tobacco Control and Treatment. Am J Respir Crit Care Med 2015; 192:e22-41. [PMID: 26230245 DOI: 10.1164/rccm.201506-1081st] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Since the mid-20th century, the scientific community has substantially improved its understanding of the worldwide tobacco epidemic. Although significant progress has been made, the sheer enormity and scope of the global problem put it on track to take a billion lives this century. Curbing the epidemic will require maximizing the impact of proven tools as well as the development of new, breakthrough methods to help interrupt the spread of nicotine addiction and reduce the downstream morbidity. METHODS Members of the Tobacco Action Committee of the American Thoracic Society queried bibliographic databases, including Medline, Embase, and the Cochrane Collaborative, to identify primary sources and reviews relevant to the epidemic. Exploded search terms were used to identify evidence, including tobacco, addiction, smoking, cigarettes, nicotine, and smoking cessation. Evidence was consolidated into three thematic areas: (1) determinants of risk, (2) maternal-fetal exposure, and (3) current tobacco users. Expert panel consensus regarding current gaps in understanding and recommendations for future research priorities was generated through iterative discussion. RESULTS Although much has been accomplished, significant gaps in understanding remain. Implementation often lags well behind insight. This report identifies a number of investigative opportunities for significantly reducing the toll of tobacco use, including: (1) the need for novel, nonlinear models of population-based disease control; (2) refinement of "real-world" models of clinical intervention in trial design; and (3) understanding of mechanisms by which intrauterine smoke exposure may lead to persistent, tobacco-related chronic disease. DISCUSSION In the coming era of tobacco research, pooled talent from multiple disciplines will be required to further illuminate the complex social, environmental and biological codeterminants of tobacco dependence.
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Shiffman S, Dunbar MS, Tindle HA, Ferguson SG. Nondaily smokers' experience of craving on days they do not smoke. JOURNAL OF ABNORMAL PSYCHOLOGY 2015; 124:648-59. [PMID: 26052617 PMCID: PMC4624293 DOI: 10.1037/abn0000063] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Nondaily, or intermittent smokers (ITS), represent a growing pattern in adult smoking that needs to be explained by models of drug dependence. ITS regularly and voluntarily abstain from smoking, yet have difficulty quitting. We examine potential accounts of ITS' smoking by exploring their experience of craving and withdrawal on the days they abstain. For 3 weeks, 146 ITS and 194 daily smokers used the Ecological Momentary Assessment (EMA) to monitor craving, withdrawal, and smoking in real-time. ITS' craving (p < .001) and arousal (p < .001) were significantly lower on the 34.4% of days when they abstained (compared with days they smoked), and they experienced no increases in withdrawal symptoms. ITS who abstained for longer experienced lower craving, even on their first day of abstinence (p < .001). Within strata defined by longest duration of abstinence (1, 2-3, 4-6, ≥7 days), craving did not change over time, demonstrating no increase as resumption of smoking approached. Craving increased only at the moment smoking resumed. Furthermore, duration of abstinence runs varied more within persons than across persons. These findings contradict the predictions of a model positing that craving recurs at fixed intervals. Findings are consistent with the hypothesis that ITS' smoking is cued or primed by particular stimuli rather than by temporal cycles. These analyses demonstrate that ITS do not experience increased craving or withdrawal on days they do not smoke, and show neither signs of classical dependence nor regular cycles of craving and smoking.
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Abstract
For the past 30 years, research examining predictors of successful smoking cessation treatment response has focused primarily on clinical variables, such as levels of tobacco dependence, craving, and self-efficacy. However, recent research has begun to determine biomarkers (such as genotype, nicotine and metabolite levels, and brain imaging findings) that may have utility in predicting smoking cessation. For genotype, genes associated with nicotinic acetylcholine receptors (nAChRs) and related proteins have been found to predict response to first-line medications (e.g. nicotine replacement therapy [NRT], bupropion, or varenicline) or quitting over time without a controlled treatment trial. For nicotine and metabolite levels, function of the cytochrome P450 2A6 liver enzyme, which can be assessed with the nicotine metabolite ratio or via genotype, has been found to predict response, with slow nicotine metabolizers having less severe nicotine dependence and a greater likelihood of quitting with NRT than normal metabolizers. For brain imaging, decreased activation of brain regions associated with emotion regulation and increased connectivity in emotion regulation networks, increased responsiveness to pleasant cues, and altered activation with the Stroop effect have been found in smokers who quit with the first-line medications listed above or counseling. In addition, our group recently demonstrated that lower pre-treatment brain nAChR density is associated with a greater chance of quitting smoking with NRT or placebo. Several of these studies found that specific biomarkers may provide additional information for predicting response beyond subjective symptom or rating scale measures, thereby giving an initial indication that biomarkers may, in the future, be useful for guiding smoking cessation treatment intensity, duration, and type.
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14
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Multigenerational and transgenerational inheritance of drug exposure: The effects of alcohol, opiates, cocaine, marijuana, and nicotine. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2015; 118:21-33. [PMID: 25839742 DOI: 10.1016/j.pbiomolbio.2015.03.002] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 03/02/2015] [Accepted: 03/06/2015] [Indexed: 12/15/2022]
Abstract
Familial inheritance of drug abuse is composed of both genetic and environmental factors. Additionally, epigenetic transgenerational inheritance may provide a means by which parental drug use can influence several generations of offspring. Recent evidence suggests that parental drug exposure produces behavioral, biochemical, and neuroanatomical changes in future generations. The focus of this review is to discuss these multigenerational and transgenerational phenotypes in the offspring of animals exposed to drugs of abuse. Specifically, changes found following the administration of alcohol, opioids, cocaine, marijuana, and nicotine will be discussed. In addition, epigenetic modifications to the genome following administration of these drugs will be detailed as well as their potential for transmission to the next generation.
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15
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Zhang XY, Chen DC, Tan YL, Luo X, Zuo L, Lv MH, Shah NN, Zunta-Soares GB, Soares JC. Smoking and BDNF Val66Met polymorphism in male schizophrenia: a case-control study. J Psychiatr Res 2015; 60:49-55. [PMID: 25455509 DOI: 10.1016/j.jpsychires.2014.09.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/17/2014] [Accepted: 09/18/2014] [Indexed: 12/29/2022]
Abstract
Some recent studies show an association between a functional polymorphism of BDNF gene (Val66Met) and the susceptibility to nicotine dependence and we hypothesized that this polymorphism was associated with smoking in both schizophrenia patients and healthy controls. The BDNF Val66Met gene polymorphism was genotyped in 690 chronic male schizophrenia patients (smoker/nonsmoker = 522/169) and 628 male controls (smoker/nonsmoker = 322/306) using a case-control design. Nicotine dependence (ND) was assessed by the cigarettes smoked per day (CPD), the Heaviness of Smoking Index (HSI), and the Fagerstrom Test for ND (FTND). Patients also were rated on the Positive and Negative Syndrome Scale (PANSS). The results showed no significant differences in BDNF Val66Met genotype and allele distributions between the patients and healthy controls or between smokers and nonsmokers in either patients or healthy controls alone. In patient groups, however, the smokers with the Met allele had significantly higher HSI scores (Met/Met: 2.8 ± 1.7 vs. Met/Val: 2.2 ± 1.7 vs. Val/Val: 2.0 ± 1.6, p < 0.01) and a trend toward a significantly higher FTND score (p = 0.09) than those with the Val/Val genotype. In addition, the smokers showed significantly lower PANSS negative symptom and total scores, longer duration of illness and more hospitalizations (all p < 0.05). In the control group, the smokers with the Met allele started smoking significantly earlier than those with the Val/Val genotype (both p < 0.05). These results suggest that the BDNF Val66Met polymorphism may affect a smoker's response to nicotine in both schizophrenia and healthy controls from a Chinese Han population, but with differential effects in different aspects of smoking behaviors.
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Affiliation(s)
- Xiang Yang Zhang
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China; Department of Psychiatry and Behavioral Sciences, Harris County Psychiatric Center, The University of Texas Health Science Center at Houston, Houston, TX, USA.
| | - Da-Chun Chen
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China
| | - Yun-Long Tan
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China
| | - Xingguang Luo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Lingjun Zuo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Meng-Han Lv
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China
| | - Nurun N Shah
- Department of Psychiatry and Behavioral Sciences, Harris County Psychiatric Center, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Giovana B Zunta-Soares
- Department of Psychiatry and Behavioral Sciences, Harris County Psychiatric Center, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Jair C Soares
- Department of Psychiatry and Behavioral Sciences, Harris County Psychiatric Center, The University of Texas Health Science Center at Houston, Houston, TX, USA.
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Prioritizing Genes Related to Nicotine Addiction Via a Multi-source-Based Approach. Mol Neurobiol 2014; 52:442-55. [PMID: 25193020 DOI: 10.1007/s12035-014-8874-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 08/19/2014] [Indexed: 10/24/2022]
Abstract
Nicotine has a broad impact on both the central and peripheral nervous systems. Over the past decades, an increasing number of genes potentially involved in nicotine addiction have been identified by different technical approaches. However, the molecular mechanisms underlying nicotine addiction remain largely unknown. Under such situation, prioritizing the candidate genes for further investigation is becoming increasingly important. In this study, we presented a multi-source-based gene prioritization approach for nicotine addiction by utilizing the vast amounts of information generated from for nicotine addiction study during the past years. In this approach, we first collected and curated genes from studies in four categories, i.e., genetic association analysis, genetic linkage analysis, high-throughput gene/protein expression analysis, and literature search of single gene/protein-based studies. Based on these resources, the genes were scored and a weight value was determined for each category. Finally, the genes were ranked by their combined scores, and 220 genes were selected as the prioritized nicotine addiction-related genes. Evaluation suggested the prioritized genes were promising targets for further analysis and replication study.
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Abstract
OBJECTIVES To assess the risk of becoming a smoker in adulthood associated with parental smoking as well as the smoking of siblings and close friends. DESIGN A cross-sectional study. SETTING 4 oral healthcare centres in Finland and a follow-up. PARTICIPANTS An age cohort born in 1979 (n=2586) and living in four Finnish towns. Of those reached by the 2008 follow-up, 46.9% (n=1020) responded. PRIMARY AND SECONDARY OUTCOME MEASURES Smoking behaviour at the age of 29. Smoking behaviour at the age of 13 and smoking behaviour of family members and close friends. RESULTS Smoking of a current close friend was strongly associated with participants' own smoking (OR 5.6, 95% CI 3.6 to 8.8). The smoking of a close friend during schooldays was similarly associated (OR 2.9, 95% CI 1.8 to 4.5). Smoking among men was associated with the smoking behaviour of mothers and siblings while that among females was not. CONCLUSIONS The impact of a smoker as a close friend is greater than that of a smoking parent or sibling in school age when it comes to smoking behaviour in adulthood. This should be taken into consideration when attempting to prevent smoking initiation or continuation. TRIAL REGISTRATION At clinicaltrials.gov (NCT01348646).
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Affiliation(s)
- Antti J Saari
- Department of General Practice, University of Tampere, Tampere, Finland
- JYTA, Tunkkari Health Care Center, Veteli, Finland
| | | | - Kari J Mattila
- Department of General Practice, University of Tampere, Tampere, Finland
- Center of General Practice, Pirkanmaa Hospital District, Tampere, Finland
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Hsu PC, Zhou B, Zhao Y, Ressom H, Cheema AK, Pickworth W, Shields PG. Feasibility of identifying the tobacco-related global metabolome in blood by UPLC-QTOF-MS. J Proteome Res 2013; 12:679-91. [PMID: 23240883 PMCID: PMC3579455 DOI: 10.1021/pr3007705] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Indexed: 11/30/2022]
Abstract
Metabolomics is likely an ideal tool to assess tobacco smoke exposure and the impact of cigarette smoke on human exposure and health. To assess reproducibility and feasibility of this by UPLC-QTOF-MS, three experiments were designed for the assessment of smokers' blood. Experiment I was an analysis of 8 smokers with 8 replicates. Experiment II was an analysis of 62 pooled quality control (QC) samples from 7 nonsmokers' plasma placed as every tenth sample among a study of 613 samples from 160 smokers. Finally, to examine the feasibility of metabolomic study in assessing smoke exposure, Experiment III consisted of 9 smokers and 10 nonsmokers' serum to evaluate differences in their global metabolome. There was minimal measurement and sample preparation variation in all experiments, although some caution is needed when analyzing specific parts of the chromatogram. When assessing QC samples in the large scale study, QC clustering indicated high stability, reproducibility, and consistency. Finally, in addition to the identification of nicotine metabolites as expected, there was a characteristic profile distinguishing smokers from nonsmokers. Metabolites selected from putative identifications were verified by MS/MS, showing the potential to identify metabolic phenotypes and new metabolites relating to cigarette smoke exposure and toxicity.
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Affiliation(s)
- Ping-Ching Hsu
- The Ohio State
University Comprehensive Cancer Center, Columbus, Ohio,
United States
| | - Bin Zhou
- Lombardi Comprehensive
Cancer
Center, Georgetown University, Washington,
D.C., United States
| | - Yi Zhao
- Lombardi Comprehensive
Cancer
Center, Georgetown University, Washington,
D.C., United States
| | - Habtom
W. Ressom
- Lombardi Comprehensive
Cancer
Center, Georgetown University, Washington,
D.C., United States
| | - Amrita K. Cheema
- Lombardi Comprehensive
Cancer
Center, Georgetown University, Washington,
D.C., United States
| | - Wallace Pickworth
- Battelle Centers
for Public Health Research & Evaluation, Baltimore,
Maryland, United States
| | - Peter G. Shields
- The Ohio State
University Comprehensive Cancer Center, Columbus, Ohio,
United States
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Fritzsche A, Watz H, Magnussen H, Tuinmann G, Löwe B, von Leupoldt A. Cognitive biases in patients with chronic obstructive pulmonary disease and depression--a pilot study. Br J Health Psychol 2013; 18:827-43. [PMID: 23351008 DOI: 10.1111/bjhp.12025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 01/01/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Comorbid depression is highly prevalent in patients with chronic obstructive pulmonary disease (COPD) and associated with a worse course of disease; however, the exact mechanisms linking both remain unclear. In currently depressed individuals without lung disease, depression-specific biases in information processing have been suggested as risk factors for the development and maintenance of depression. We examined whether comparable biases in cognitive information processing might underlie depression in COPD. DESIGN Different aspects of cognitive information processing were examined with computer-based tasks measuring selective attention and memory in patients with COPD who were compared with age-matched, currently depressed patients without lung disease and healthy control participants. METHODS The Self-Referential Encoding and Incidental Recall Task as well as the emotion face dot-probe task was applied to 21 never-depressed COPD patients, 18 currently depressed COPD patients, 20 currently depressed patients without lung disease and 19 healthy controls to examine cognitive biases. RESULTS In both patients with COPD who were never and who were currently depressed, depression-like cognitive biases were observed for some attention- and memory-related tasks, but not for all tested aspects of information processing. These biases were particularly prominent in patients with COPD and current depression and comparable to those observed in currently depressed patients without lung disease. CONCLUSIONS The results of this pilot study suggest that patients with COPD may potentially show depression-like biases in some aspects of cognitive information processing. Future studies are required to examine whether these biases represent a vulnerability factor for the development of depression in patients with COPD.
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Affiliation(s)
- Anja Fritzsche
- Department of Psychology, University of Hamburg, Germany
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Doran N, Schweizer CA, Myers MG, Greenwood TA. A prospective study of the effects of the DRD2/ANKK1 TaqIA polymorphism and impulsivity on smoking initiation. Subst Use Misuse 2013; 48:106-16. [PMID: 23153044 DOI: 10.3109/10826084.2012.733791] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This study tested whether DRD2/ANKK1 TaqIA genotype predicted smoking initiation and subsequent use, and effects were mediated by sensation seeking and negative urgency. Between 2009 and 2012, college never smokers (n = 387) completed six assessments over 15 months; those who reported smoking were classified as initiators. Logistic regression indicated that the A1 allele was associated with initiation (p = .003). This effect was partially mediated by sensation seeking and negative urgency. Effects were stronger in Asian Americans. Findings have implications for improving prevention by including elements focused on urges to seek positive or negative reinforcement. Limitations and future directions are discussed.
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Affiliation(s)
- Neal Doran
- Department of Psychiatry, University of California, San Diego, San Diego, California 92161, USA.
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Zhang XY, Chen DC, Xiu MH, Luo X, Zuo L, Haile CN, Kosten TA, Kosten TR. BDNF Val66Met variant and smoking in a Chinese population. PLoS One 2012; 7:e53295. [PMID: 23285275 PMCID: PMC3532294 DOI: 10.1371/journal.pone.0053295] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2012] [Accepted: 11/27/2012] [Indexed: 01/01/2023] Open
Abstract
Several recent studies have supported the hypothesis that brain-derived neurotrophic factor (BDNF), a member of the neurotrophic factor family, might be associated with nicotine addiction. Association studies have also suggested that the BDNF gene might play a role in the susceptibility to nicotine dependence but results appear contradictory. The present work was therefore undertaken to examine the association of smoking with the BDNF Val66Met gene polymorphism in Chinese population. The BDNF Val66Met gene polymorphism was examined in 628 healthy male volunteers including 322 smokers and 306 non-smokers. Also, the BDNF serum levels were measured in 136 smokers and 97 nonsmokers. Our results showed no significant association between the BDNF Val66Met polymorphism or serum levels among smokers and non-smokers. Smokers with the Met allele however started smoking significantly earlier than those with the Val/Val genotype (mean age at smoking initiation of 17.4, 17.9 and 21.2 years for Met/Met, Met/Val, and Val/Val, respectively; both p<0.05). No other significant differences between other variables such as number of cigarettes per day, smoking severity as measured by the Fagerstrom Test for Nicotine Dependence (FTND) score and carbon monoxide (CO) levels (all p>0.05). In addition, there was no main effect of genotype on serum BDNF levels. Our findings suggest that the BDNF Val66Met polymorphism may not be involved in susceptibility to smoking among the Chinese male population, but may influence the age at which smoking is initiated. However, the findings must be interpreted with caution because of the relatively small sample size for an association study. Results should be confirmed in a larger cohort.
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Affiliation(s)
- Xiang Yang Zhang
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, Texas, United States of America
- Psychiatric Research Center, Beijing Hui-Long-Guan hospital, Peking University, Beijing, China
- * E-mail: (YYZ); (TRK)
| | - Da Chun Chen
- Psychiatric Research Center, Beijing Hui-Long-Guan hospital, Peking University, Beijing, China
| | - Mei Hong Xiu
- Psychiatric Research Center, Beijing Hui-Long-Guan hospital, Peking University, Beijing, China
| | - Xingguang Luo
- Department of Psychiatry, Yale University, New Haven, Connecticut, United States of America
| | - Lingjun Zuo
- Department of Psychiatry, Yale University, New Haven, Connecticut, United States of America
| | - Colin N. Haile
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, Texas, United States of America
| | - Therese A. Kosten
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, Texas, United States of America
| | - Thomas R. Kosten
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, Texas, United States of America
- Psychiatric Research Center, Beijing Hui-Long-Guan hospital, Peking University, Beijing, China
- * E-mail: (YYZ); (TRK)
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Whitbeck LB, Hartshorn KJS, McQuillan J, Crawford DM. Factors Associated with Growth in Daily Smoking among Indigenous Adolescents. JOURNAL OF RESEARCH ON ADOLESCENCE : THE OFFICIAL JOURNAL OF THE SOCIETY FOR RESEARCH ON ADOLESCENCE 2012; 22:768-781. [PMID: 23794792 PMCID: PMC3686135 DOI: 10.1111/j.1532-7795.2012.00825.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
North American Indigenous adolescents smoke earlier, smoke more, and are more likely to become regular smokers as adults than youth from any other ethnic group yet we know very little about their early smoking trajectories. We use multilevel growth modeling across five waves of data from Indigenous adolescents (aged 10 to 13 years at Wave 1) to investigate factors associated with becoming a daily smoker. Several factors, including number of peers who smoked at Wave 1 and meeting diagnostic criteria for major depressive episode and conduct disorder were associated with early daily smoking. Only age and increases in the number of smoking peers were associated with increased odds of becoming a daily smoker.
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Horimoto ARVR, Oliveira CM, Giolo SR, Soler JP, de Andrade M, Krieger JE, Pereira AC. Genetic analyses of smoking initiation, persistence, quantity, and age-at-onset of regular cigarette use in Brazilian families: the Baependi Heart Study. BMC MEDICAL GENETICS 2012; 13:9. [PMID: 22289947 PMCID: PMC3395823 DOI: 10.1186/1471-2350-13-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 01/30/2012] [Indexed: 01/24/2023]
Abstract
BACKGROUND The purpose of this study was to estimate the genetic influences on the initiation of cigarette smoking, the persistence, quantity and age-at-onset of regular cigarette use in Brazilian families. METHODS The data set consisted of 1,694 individuals enrolled in the Baependi Heart Study. The heritability and the heterogeneity in genetic and environmental variance components by gender were estimated from variance components approaches, using the SOLAR (Sequential Oligogenic Linkage Analysis Routines) computer package. The mixed-effects Cox model was used for the genetic analysis of the age-at onset of regular cigarette use. RESULTS The heritability estimates were high (> 50%) for smoking initiation and were intermediate, ranging from 23.4 to 31.9%, for smoking persistence and quantity. Significant evidence for heterogeneity in variance components by gender was observed for smoking initiation and age-at-onset of regular cigarette use. Genetic factors play an important role in the interindividual variation of these phenotypes in females, while in males there is a predominant environmental component, which could be explained by greater social influences in the initiation of tobacco use. CONCLUSIONS Significant heritabilities were observed in smoking phenotypes for both males and females from the Brazilian population. These data add to the literature and are concordant with the notion of significant biological determination in smoking behavior. Samples from the Baependi Heart Study may be valuable for the mapping of genetic loci that modulate this complex biological trait.
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Affiliation(s)
- Andréa RVR Horimoto
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, Medical School of University of São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, São Paulo, SP, 05403-000, Brazil
| | - Camila M Oliveira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, Medical School of University of São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, São Paulo, SP, 05403-000, Brazil
| | - Suely R Giolo
- Department of Statistics, Polytechnic Center, Federal University of Paraná, Av. Cel. Francisco H. Santos, 100, Curitiba, PR, 81531-990, Brazil
| | - Júlia P Soler
- Department of Statistics, Mathematics and Statistics Institute, University of São Paulo, R. do Matão, 1010, São Paulo, SP, 05508-090, Brazil
| | - Mariza de Andrade
- Department of Health Sciences Research, Mayo Clinic, 200 First Street S.W., Rochester, MN, 55905, USA
| | - José E Krieger
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, Medical School of University of São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, São Paulo, SP, 05403-000, Brazil
| | - Alexandre C Pereira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, Medical School of University of São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, São Paulo, SP, 05403-000, Brazil
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Gelenberg AJ, de Leon J, Evins AE, Parks JJ, Rigotti NA. Smoking cessation in patients with psychiatric disorders. PRIMARY CARE COMPANION TO THE JOURNAL OF CLINICAL PSYCHIATRY 2011; 10:52-8. [PMID: 18311422 DOI: 10.4088/pcc.v10n0109] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Carlsten C, Halperin A, Crouch J, Burke W. Personalized medicine and tobacco-related health disparities: is there a role for genetics? Ann Fam Med 2011; 9:366-71. [PMID: 21747109 PMCID: PMC3133585 DOI: 10.1370/afm.1244] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Genetic testing has been proposed as a means to increase smoking cessation rates and thus reduce smoking prevalence. To understand how that might be practically possible, with appreciation of the current social context of tobacco use and dependence, we performed a contextual analysis of smoking-related genetics and smoking cessation. To provide added value, genetics would need to inform and improve existing interventions for smokers (including behavioral and pharmacological treatments). Pharmacogenetics offers the most promising potential, because it may improve the efficacy of medication-based smoking cessations strategies. All proven interventions for treating tobacco dependence, however, including simple cost-effective measures, such as quit lines and physician counseling, are underutilized. As tobacco use occurs disproportionately among disadvantaged populations, efforts to improve smokers' access to health care, and to the tools that are known to help them quit, represent the most promising approaches for reducing smoking prevalence within these groups. Similar considerations apply to other chronic diseases contributing to population-level health disparities. We conclude that although genetics offers increasing opportunities to tailor drug treatment, and may in some cases provide useful risk prediction, other methods of personalizing care are likely to yield greater benefit to populations experiencing health disparities related to tobacco use.
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Park ER, Kleimann S, Youatt EJ, Lockhart A, Campbell EG, Levy DE, Halbert CH, Schmieder E, Krishna R, Shields AE. Black and White adults' perspectives on the genetics of nicotine addiction susceptibility. Addict Behav 2011; 36:769-72. [PMID: 21406316 PMCID: PMC3732108 DOI: 10.1016/j.addbeh.2011.02.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 01/18/2011] [Accepted: 02/18/2011] [Indexed: 10/18/2022]
Abstract
AIMS Emerging research may soon lead to improved quit rates via genetically-tailored smoking cessation treatment. The purpose of this study was to explore individuals' beliefs and attitudes about genetic testing in this context, and how these may differ across racial groups. DESIGN Two site qualitative study. METHODS Eleven focus groups were conducted in 2007 with 51 Black and 55 White adult participants in Montgomery, AL and Baltimore, MD. MEASUREMENTS Questions were asked about smoking as an addiction, the role of genetics in nicotine addiction susceptibility, and undergoing genetic testing to receive tailored smoking cessation treatment. Data were analyzed using content analysis. FINDINGS Most participants believed that smoking was an addiction yet were unwilling to endorse the notion that genetics played a role in nicotine addiction susceptibility. However, 91% of White participants and 62% of Black participants indicated that they would likely take a genetic test that would match them to their optimal smoking cessation treatment. The primary potential benefit was a vague sense that additional knowledge about oneself would be of value. Primary barriers included disinterest and skepticism about the test, unwillingness to believe that genetics played a role in nicotine addiction or treatment response, and concerns about psychological consequences. CONCLUSIONS The majority of participants, particularly Black participants, did not believe that genetics played a significant role in nicotine addiction susceptibility but were willing to undergo genetic testing. Participants identified some benefit to tailoring smoking treatment by genotype. However, participants also expressed skepticism about the test and concerns about its consequences; these issues would need to be addressed in the clinical encounter.
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Affiliation(s)
- Elyse R Park
- Harvard/MGH Center on Genomics, Vulnerable Populations, and Health Disparities, Boston, MA 02114, United States.
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Weinsier ST. Integrating results from smoking cessation drug research and development into clinical occupational health practice. AAOHN JOURNAL : OFFICIAL JOURNAL OF THE AMERICAN ASSOCIATION OF OCCUPATIONAL HEALTH NURSES 2011; 59:69-76. [PMID: 21261230 DOI: 10.3928/08910162-20110117-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 10/19/2010] [Indexed: 05/30/2023]
Abstract
This article documents evidence-based pharmacologic interventions to promote successful smoking cessation among employees who smoke. The article also highlights supporting evidence for the use of pharmacologic agents to treat tobacco dependence and can guide successful, personalized, pharmacologic smoking cessation interventions in occupational clinical practice. Prescribing clinicians will also find information about the latest research and development of medications to promote smoking cessation, including recently implemented black box warnings by the U.S. Food and Drug Administration.
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Wang J, Li MD. Common and unique biological pathways associated with smoking initiation/progression, nicotine dependence, and smoking cessation. Neuropsychopharmacology 2010; 35:702-19. [PMID: 19890259 PMCID: PMC2814000 DOI: 10.1038/npp.2009.178] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Twin and family studies reveal a significant genetic contribution to the risk of smoking initiation and progression (SI/P), nicotine dependence (ND), and smoking cessation (SC). Further, numerous genes have been implicated in these smoking-related behaviors, especially for ND. However, no study has presented a comprehensive and systematic view of the genetic factors associated with these important smoking-related phenotypes. By reviewing the literature on these behaviors, we identified 16, 99, and 75 genes that have been associated with SI/P, ND, and SC, respectively. We then determined whether these genes were enriched in pathways important in the neuronal and brain functions underlying addiction. We identified 9, 21, and 13 pathways enriched in the genes associated with SI/P, ND, and SC, respectively. Among these pathways, four were common to all of the three phenotypes, that is, calcium signaling, cAMP-mediated signaling, dopamine receptor signaling, and G-protein-coupled receptor signaling. Further, we found that serotonin receptor signaling and tryptophan metabolism pathways were shared by SI/P and ND, tight junction signaling pathway was shared by SI/P and SC, and gap junction, neurotrophin/TRK signaling, synaptic long-term potentiation, and tyrosine metabolism were shared between ND and SC. Together, these findings show significant genetic overlap among these three related phenotypes. Although identification of susceptibility genes for smoking-related behaviors is still in an early stage, the approach used in this study has the potential to overcome the hurdles caused by factors such as genetic heterogeneity and small sample size, and thus should yield greater insights into the genetic mechanisms underlying these complex phenotypes.
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Affiliation(s)
- Ju Wang
- Section of Neurobiology, Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
| | - Ming D Li
- Section of Neurobiology, Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA,Section of Neurobiology, Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, 1670 Discovery Drive, Suite 110, Charlottesville, VA 22911, USA. Tel: +434 243 0566; Fax: +434 973 7031; E-mail:
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McEachin RC, Saccone NL, Saccone SF, Kleyman-Smith YD, Kar T, Kare RK, Ade AS, Sartor MA, Cavalcoli JD, McInnis MG. Modeling complex genetic and environmental influences on comorbid bipolar disorder with tobacco use disorder. BMC MEDICAL GENETICS 2010; 11:14. [PMID: 20102619 PMCID: PMC2823619 DOI: 10.1186/1471-2350-11-14] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Accepted: 01/26/2010] [Indexed: 01/15/2023]
Abstract
Background Comorbidity of psychiatric and substance use disorders represents a significant complication in the clinical course of both disorders. Bipolar Disorder (BD) is a psychiatric disorder characterized by severe mood swings, ranging from mania to depression, and up to a 70% rate of comorbid Tobacco Use Disorder (TUD). We found epidemiological evidence consistent with a common underlying etiology for BD and TUD, as well as evidence of both genetic and environmental influences on BD and TUD. Therefore, we hypothesized a common underlying genetic etiology, interacting with nicotine exposure, influencing susceptibility to both BD and TUD. Methods Using meta-analysis, we compared TUD rates for BD patients and the general population. We identified candidate genes showing statistically significant, replicated, evidence of association with both BD and TUD. We assessed commonality among these candidate genes and hypothesized broader, multi-gene network influences on the comorbidity. Using Fisher Exact tests we tested our hypothesized genetic networks for association with the comorbidity, then compared the inferences drawn with those derived from the commonality assessment. Finally, we prioritized candidate SNPs for validation. Results We estimate risk for TUD among BD patients at 2.4 times that of the general population. We found three candidate genes associated with both BD and TUD (COMT, SLC6A3, and SLC6A4) and commonality analysis suggests that these genes interact in predisposing psychiatric and substance use disorders. We identified a 69 gene network that influences neurotransmitter signaling and shows significant over-representation of genes associated with BD and TUD, as well as genes differentially expressed with exposure to tobacco smoke. Twenty four of these genes are known drug targets. Conclusions This work highlights novel bioinformatics resources and demonstrates the effectiveness of using an integrated bioinformatics approach to improve our understanding of complex disease etiology. We illustrate the development and testing of hypotheses for a comorbidity predisposed by both genetic and environmental influences. Consistent with our hypothesis, the selected network models multiple interacting genetic influences on comorbid BD with TUD, as well as the environmental influence of nicotine. This network nominates candidate genes for validation and drug testing, and we offer a panel of SNPs prioritized for follow-up.
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Marian C, O'Connor RJ, Djordjevic M, Rees VW, Hatsukami DK, Shields PG. Reconciling human smoking behavior and machine smoking patterns: implications for understanding smoking behavior and the impact on laboratory studies. Cancer Epidemiol Biomarkers Prev 2009; 18:3305-20. [PMID: 19959678 PMCID: PMC2789355 DOI: 10.1158/1055-9965.epi-09-1014] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Recent Food and Drug Administration legislation enables the mandating of product performance standards for cigarette smoke and the evaluation of manufacturers' health claims for modified tobacco products. Laboratory studies used for these evaluations and also for understanding tobacco smoke toxicology use machines to generate smoke. The goal of this review is to critically evaluate methods to assess human smoking behavior and replicate this in the laboratory. METHODS Smoking behavior and smoking machine studies were identified using PubMed and publicly available databases for internal tobacco company documents. RESULTS The smoking machine was developed to generate smoke to allow for comparing cigarette tar and nicotine yields. The intent was to infer relative human disease risk, but this concept was flawed because humans tailor their smoking to the product, and chemical yields and toxicologic effects change with different smoking profiles. Although smoking machines also allow for mechanistic assessments of smoking-related diseases, the interpretations also are limited. However, available methods to assess how humans puff could be used to provide better laboratory assessments, but these need to be validated. Separately, the contribution of smoke mouth-holding and inhalation to dose need to be assessed, because these parts of smoking are not captured by the smoking machine. Better comparisons of cigarettes might be done by tailoring human puff profiles to the product based on human studies and comparing results across regimens. CONCLUSIONS There are major research gaps that limit the use of smoking machine studies for informing tobacco control regulation and mechanistic studies.
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Affiliation(s)
- Catalin Marian
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Cancer, Washington, DC 20057
| | - Richard J. O'Connor
- Department of Health Behavior, Roswell Park Cancer Institute, Buffalo, NY 14263
| | - Mirjana Djordjevic
- Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD 20892
| | - Vaughan W. Rees
- Division of Public Health Practice, Harvard School of Public Health, Boston, MA
| | - Dorothy K. Hatsukami
- University of Minnesota Transdisciplinary Tobacco Use Research Center, Minneapolis, MN 55414, USA
| | - Peter G. Shields
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Cancer, Washington, DC 20057
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Abstract
Tobacco use is the leading preventable cause of morbidity and death in the United States. Because 80% to 90% of adult smokers began during adolescence, and two thirds became regular, daily smokers before they reached 19 years of age, tobacco use may be viewed as a pediatric disease. Every year in the United States, approximately 1.4 million children younger than 18 years start smoking, and many of them will die prematurely from a smoking-related disease. Moreover, there is recent evidence that adolescents report symptoms of tobacco dependence early in the smoking process, even before becoming daily smokers. The prevalence of tobacco use is higher among teenagers and young adults than among older adult populations. The critical role of pediatricians in helping to reduce tobacco use and addiction and secondhand tobacco-smoke exposure in the pediatric population includes education and prevention, screening and detection, and treatment and referral.
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Influences of polymorphic variants of DRD2 and SLC6A3 genes, and their combinations on smoking in Polish population. BMC MEDICAL GENETICS 2009; 10:92. [PMID: 19761593 PMCID: PMC2758863 DOI: 10.1186/1471-2350-10-92] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/06/2008] [Accepted: 09/17/2009] [Indexed: 11/10/2022]
Abstract
BACKGROUND Polymorphisms in dopaminergic genes may influence cigarette smoking by their potential impact on dopamine reward pathway function. A1 allele of DRD2 gene is associated with a reduced dopamine D2 receptor density, and it has been hypothesised that A1 carriers are more vulnerable to smoking. In turn, the 9-repeat allele of dopamine transporter gene (SLC6A3) has been associated with a substantial reduction in dopamine transporter, what might result in the higher level of dopamine in the synaptic cleft, and thereby protective role of this allele from smoking. In the present study we investigated whether polymorphic variants of DRD2 and SLC6A3 genes and their combinations are associated with the smoking habit in the Polish population. METHODS Genotyping for TaqIA polymorphism of DRD2 and SLC6A3 VNTR polymorphism was performed in 150 ever-smokers and 158 never-smokers. The association between the smoking status and smoking phenotypes (related to the number of cigarettes smoked daily and age of starting regular smoking), and genotype/genotype combinations was expressed by ORs together with 95% CI. Alpha level of 0.05, with Bonferroni correction whenever appropriate, was used for statistical significance. RESULTS At the used alpha levels no association between DRD2 and SLC6A3 genotypes and smoking status was found. However, A1 allele carriers reported longer abstinence periods on quitting attempts than non-carriers (p = 0.049). The ORs for heavier smoking were 0.38 (0.17-0.88), p = 0.023, and 0.39 (0.17-0.88), p = 0.021 in carriers compared to non-carriers of A1 or *9 allele, respectively, and the OR for this smoking phenotype was 8.68 (2.47-30.46), p = 0.0005 for the A1-/9- genotype combination, relatively to the A1+/9+. Carriers of *9 allele of SLC6A3 had over twice a lower risk to start smoking before the age of 20 years compared to non-carriers (sex-adjusted OR = 0.44; 95% CI: 0.22-0.89; p = 0.0017), and subjects with A1-/9- genotype combination had a higher risk for staring regular smoking before the age of 20 years in comparison to subjects with A1+/9+ genotype combination (sex-adjusted OR = 3.79; 95% CI:1.03-13.90; p = 0.003). CONCLUSION Polymorphic variants of DRD2 and SLC6A3 genes may influence some aspects of the smoking behavior, including age of starting regular smoking, the level of cigarette consumption, and periods of abstinence. Further large sample studies are needed to verify this hypothesis.
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Freathy RM, Ring SM, Shields B, Galobardes B, Knight B, Weedon MN, Smith GD, Frayling TM, Hattersley AT. A common genetic variant in the 15q24 nicotinic acetylcholine receptor gene cluster (CHRNA5-CHRNA3-CHRNB4) is associated with a reduced ability of women to quit smoking in pregnancy. Hum Mol Genet 2009; 18:2922-7. [PMID: 19429911 PMCID: PMC2706684 DOI: 10.1093/hmg/ddp216] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Maternal smoking during pregnancy is associated with low birth weight and adverse pregnancy outcomes. Women are more likely to quit smoking during pregnancy than at any other time in their lives, but some pregnant women continue to smoke. A recent genome-wide association study demonstrated an association between a common polymorphism (rs1051730) in the nicotinic acetylcholine receptor gene cluster (CHRNA5–CHRNA3–CHRNB4) and both smoking quantity and nicotine dependence. We aimed to test whether the same polymorphism that predisposes to greater cigarette consumption would also reduce the likelihood of smoking cessation in pregnancy. We studied 7845 pregnant women of European descent from the South-West of England. Using 2474 women who smoked regularly immediately pre-pregnancy, we analysed the association between the rs1051730 risk allele and both smoking cessation during pregnancy and smoking quantity. Each additional copy of the risk allele was associated with a 1.27-fold higher odds (95% CI 1.11–1.45) of continued smoking during pregnancy (P = 0.0006). Adjustment for pre-pregnancy smoking quantity weakened, but did not remove this association [odds ratio (OR) 1.20 (95% CI 1.03–1.39); P = 0.018]. The same risk allele was also associated with heavier smoking before pregnancy and in the first, but not the last, trimester [OR for smoking 10+ cigarettes/day versus 1–9/day in first trimester = 1.30 (95% CI 1.13–1.50); P = 0.0003]. To conclude, we have found strong evidence of association between the rs1051730 variant and an increased likelihood of continued smoking in pregnancy and have confirmed the previously observed association with smoking quantity. Our data support the role of genetic factors in influencing smoking cessation during pregnancy.
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Affiliation(s)
- Rachel M Freathy
- Genetics of Complex Traits, Peninsula Medical School, Institute of Biomedical and Clinical Science, Magdalen Road, Exeter EX1 2LU, UK
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Ding W, Lehrer SF, Rosenquist JN, Audrain-McGovern J. The impact of poor health on academic performance: New evidence using genetic markers. JOURNAL OF HEALTH ECONOMICS 2009; 28:578-597. [PMID: 19217678 DOI: 10.1016/j.jhealeco.2008.11.006] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2007] [Revised: 11/25/2008] [Accepted: 11/26/2008] [Indexed: 05/27/2023]
Abstract
This paper examines the influence of health conditions on academic performance during adolescence. To account for the endogeneity of health outcomes and their interactions with risky behaviors we exploit natural variation within a set of genetic markers across individuals. We present evidence that specific genetic markers have good statistical properties to identify the impacts of ADHD, depression and obesity. These markers help reveal a new dynamism from poor health to lower academic achievement with substantial heterogeneity in their impacts across genders. Our investigation further exposes the considerable challenges in identifying health impacts due to the prevalence of comorbid health conditions, with clear implications for the health economics literature.
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Bhatti AS, Aydin C, Oztan O, Ma Z, Hall P, Tao R, Isgor C. Effects of a cannabinoid receptor (CB) 1 antagonist AM251 on behavioral sensitization to nicotine in a rat model of novelty-seeking behavior: correlation with hippocampal 5HT. Psychopharmacology (Berl) 2009; 203:23-32. [PMID: 18936914 DOI: 10.1007/s00213-008-1366-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Accepted: 10/02/2008] [Indexed: 10/21/2022]
Abstract
RATIONALE There are marked individual differences in the efficacy of mainstream nicotine cessation agents in preventing relapse. A rat model of novelty-seeking phenotype was reported to have predictive value for psychostimulant taking behavior where locomotor reactivity to novelty is used to rank high (HR, highest 1/3) versus low (LR, lowest 1/3) responsiveness to novelty in outbred rats. We tested the hypothesis that a cannabinoid receptor (CB) 1 antagonist that is in clinical trials for smoking cessation may reverse behaviorally sensitizing effects of nicotine in HRs and repeated nicotine-induced elevations in hippocampal 5HT. MATERIALS AND METHODS Adolescent LRHR rats underwent intermittent behavioral sensitization to nicotine regimen with or without a CB1 receptor antagonist AM251 or bupropion treatment following nicotine training during 1 week of nicotine-free period. Expression of behavioral sensitization to nicotine was assessed in response to a low-dose nicotine challenge. Using the same sensitization regimen and therapeutic treatments, hippocampal 5HT levels were measured via in vivo microdialysis in response to the nicotine challenge. RESULTS HR but not LR animals showed behavioral sensitization to a low-dose nicotine challenge following intermittent nicotine training and 1 week of injection-free period. AM251 (5 mg/kg, i.p.) but not bupropion administration during injection-free period successfully reversed locomotor sensitization to nicotine challenge in HRs. AM251 treatment also reversed nicotine-induced elevations in extracellular 5HT in the HR hippocampal hilus. CONCLUSION These data suggest that CB1 antagonists may prevent locomotor sensitization to nicotine and reverse nicotine-induced elevations in hippocampal 5HT in high novelty seekers.
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Affiliation(s)
- Amrinder S Bhatti
- Department of Basic Biomedical Sciences, Charles E. Schmidt College of Science, Florida Atlantic University, Boca Raton, FL, 33431, USA
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36
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Husten CG. How should we define light or intermittent smoking? Does it matter? Nicotine Tob Res 2009; 11:111-21. [PMID: 19246425 DOI: 10.1093/ntr/ntp010] [Citation(s) in RCA: 170] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Corinne G Husten
- Office on Smoking and Health, Centers for Disease Control and Prevention, Atlanta, GA, USA.
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37
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Harakeh Z, Neiderhiser JM, Spotts EL, Engels RC, Scholte RH, Reiss D. Genetic factors contribute to the association between peers and young adults smoking: univariate and multivariate behavioral genetic analyses. Addict Behav 2008; 33:1113-22. [PMID: 18584970 DOI: 10.1016/j.addbeh.2008.02.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2007] [Revised: 02/25/2008] [Accepted: 02/28/2008] [Indexed: 10/22/2022]
Abstract
This present study investigated the genetic and environmental influences on the associations between adolescents' peer characteristics (i.e., peer college orientation, and peer delinquency) and smoking in young adulthood. We used longitudinal data from the Nonshared Environment and Adolescent Development (NEAD) project. Parents' reports on adolescents' peer characteristics and adolescents' self-reports on smoking in young adulthood were examined. Genetic and environmental influences on each construct as well as on the association between the two were analyzed. Findings showed that genetic and nonshared environmental influences contributed to peer college orientation and smoking status. Genetic, shared and nonshared environmental influences contributed to peer delinquency. Further, genetic and nonshared environmental influences contributed to the association between adolescents' peer college orientation and smoking in young adulthood. Genetic and shared environmental influences contributed to the association between adolescents' peer delinquency and smoking in young adulthood. In conclusion, the present study showed that genetic influences contributed to adolescents' peer characteristics and, in addition, genetic factors mediated the association between peer characteristics and smoking.
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38
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O'Neill SC, Luta G, Peshkin BN, Abraham A, Walker LR, Tercyak KP. Adolescent medical providers' willingness to recommend genetic susceptibility testing for nicotine addiction and lung cancer risk to adolescents. J Pediatr Psychol 2008; 34:617-26. [PMID: 18687733 DOI: 10.1093/jpepsy/jsn086] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To examine the influences of disease, lifestyle, and other factors on adolescent medical providers' willingness to recommend genetic susceptibility testing (GST). METHOD Providers attending a national conference completed a self-report survey (n = 232) about their willingness to recommend hypothetical GSTs, differentiated by disease (nicotine addiction/lung cancer), patient lifestyle (nonsmoker/smoker), and other contextual factors. RESULTS Compared to recommending GST unconditionally, providers were more willing to recommend GST with parental/patient consent/assent, and in the presence of a preexisting illness and substance abuse history. Compared to offering nicotine addiction GST to a nonsmoker, providers were more willing to offer this type of testing to a smoker and were more willing to offer GST for lung cancer regardless of patient lifestyle. CONCLUSIONS Providers' willingness to recommend GSTs is sensitive to many factors. Efforts to integrate GST into adolescent preventive care likely will need to address these and other influences on provider behavior.
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Affiliation(s)
- Suzanne C O'Neill
- Cancer Control Program, Lombardi Comprehensive Cancer Center, Washington DC 20007, USA.
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39
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Triche EW, Hossain N, Paidas MJ. Genetic influences on smoking cessation and relapse in pregnant women. J OBSTET GYNAECOL 2008; 28:155-60. [PMID: 18393009 DOI: 10.1080/01443610801912725] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cigarette smoking during pregnancy continues to be a significant public health concern. Maternal smoking during pregnancy has been associated with low birth weight (<2500 g), fetal growth restriction, placental problems, pre-term delivery and spontaneous abortion. Mothers who smoke during pregnancy are twice as likely to give birth to low birth weight infants, and smoking during pregnancy is estimated to be responsible for 20-30% of all low birth weight infants. Smoking during pregnancy not only affects placental function, thus causing obstetrical complications, but nicotine also crosses the placenta and acts as a neuroteratogen. This in turn, elevates the risk of cognitive and auditory processing deficits, and has also been found to be negatively associated with long-term consequences on offspring behaviour. In addition, smoking has negative long-term health consequences for both mother and child, including respiratory conditions, cancer and cardiovascular problems. This review provides insight into the genetic influences on smoking behaviour in pregnant women. In particular, the roles of genes in the neurotransmitter pathways are highlighted. It also emphasises the need for further research in this area, and provides rationale for the importance of focusing on pregnant women who are highly motivated to quit when researching smoking behaviours in women.
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Affiliation(s)
- E W Triche
- Yale University School of Medicine, New Haven, CT, USA
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40
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Shields AE, Burke W, Levy DE. Differential use of available genetic tests among primary care physicians in the United States: results of a national survey. Genet Med 2008; 10:404-14. [PMID: 18496223 PMCID: PMC2764316 DOI: 10.1097/gim.0b013e3181770184] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
PURPOSE This study assesses primary care physicians' experience ordering and referring patients for genetic testing, and whether minority-serving physicians are less likely than those serving fewer minorities to offer such services. METHODS Survey of a random sample of 2000 primary care physicians in the United States (n = 1120, 62.3% response rate based on eligible respondents) conducted in 2002 to assess what proportion have (1) ever ordered a genetic test in general or for select conditions; (2) ever referred a patient for genetic testing to a genetics center or counselor, a specialist, a clinical research trial, or to any site of care. RESULTS Nationally, 60% of primary care physicians have ordered a genetic test and 74% have referred a patient for genetic testing. Approximately 62% of physicians have referred a patient for genetic testing to a genetics center/counselor or to a specialist, and 17% to a clinical trial. Minority-serving physicians were significantly less likely to have ever ordered a genetic test for breast cancer, colorectal cancer, or Huntington disease, or to have ever referred a patient for genetic testing relative to those serving fewer minorities. CONCLUSIONS Reduced utilization of genetic tests/referrals among minority-serving physicians emphasizes the importance of tracking the diffusion of genomic medicine and assessing the potential impact on health disparities.
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Affiliation(s)
- Alexandra E Shields
- Harvard/MGH Center on Genomics, Vulnerable Populations, and Health Disparities, Massachusetts General Hospital/Partners HealthCare, Boston, Massachusetts, USA.
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41
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Hall WD. A research agenda for assessing the potential contribution of genomic medicine to tobacco control. Tob Control 2007; 16:53-8. [PMID: 17297074 PMCID: PMC2598463 DOI: 10.1136/tc.2006.016303] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This paper identifies research priorities in evaluating the ways in which "genomic medicine"--the use of genetic information to prevent and treat disease--may reduce tobacco-related harm by: (1) assisting more smokers to quit; (2) preventing non-smokers from beginning to smoke tobacco; and (3) reducing the harm caused by tobacco smoking. The method proposed to achieve the first aim is "pharmacogenetics", the use of genetic information to optimise the selection of smoking-cessation programmes by screening smokers for polymorphisms that predict responses to different methods of smoking cessation. This method competes with the development of more effective forms of smoking cessation that involve vaccinating smokers against the effects of nicotine and using new pharmaceuticals (such as cannabinoid antagonists and nicotine agonists). The second and third aims are more speculative. They include: screening the population for genetic susceptibility to nicotine dependence and intervening (eg, by vaccinating children and adolescents against the effects of nicotine) to prevent smoking uptake, and screening the population for genetic susceptibility to tobacco-related diseases. A framework is described for future research on these policy options. This includes: epidemiological modelling and economic evaluation to specify the conditions under which these strategies are cost-effective; and social psychological research into the effect of providing genetic information on smokers' preparedness to quit, and the general views of the public on tobacco smoking.
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Affiliation(s)
- Wayne D Hall
- School of Population Health, University of Queensland, Herston Road, Herston, QLD 4006, Australia.
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42
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Abstract
Certain racially classified social groups suffer disproportionately from tobacco-caused morbidity and mortality. Recent advances in genetics are leading researchers to examine variables that may account for this. However, it is critical that investigators proceed with caution and utilize transdisciplinary approaches. A number of fundamental questions might be used to stimulate consensus building in this area of science. What is race and how should its complexity be operationalized? Is it possible/likely that pharmacogenetics will allow us to match smokers with cessation strategies based on a gene-psychological profile? What are the most important conceptual and methodological issues for a research agenda in this area?
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Affiliation(s)
- Anita F Fernander
- University of Kentucky, College of Medicine, Department of Behavioral Science, 103 College of Medicine Office Building, Lexington, KY, USA.
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43
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Davis C, Levitan RD, Kaplan AS, Carter J, Reid C, Curtis C, Patte K, Kennedy JL. Dopamine transporter gene (DAT1) associated with appetite suppression to methylphenidate in a case-control study of binge eating disorder. Neuropsychopharmacology 2007; 32:2199-206. [PMID: 17314918 DOI: 10.1038/sj.npp.1301348] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Response to psychomotor stimulants is highly variable across individuals. Such inconsistencies are influenced by many factors including drug dose and polymorphic differences in genes that encode proteins, such as the dopamine transporter (DAT1), which are relevant to the site of action of these substances. The current study used a double blind, crossover (methylphenidate vs placebo) design to assess DAT1 genotype differences on appetite ratings to a snack-food cue in subjects with binge eating disorder (BED) (n=32) and healthy age-matched controls (n=46). ANOVA results indicated a significant genotype x diagnostic group interaction whereby BED subjects with at least one copy of the 9-repeat allele showed a significant suppression of appetite in response to methylphenidate compared with controls with this allele, or to subjects with the 10/10 genotype (irrespective of diagnosis) whose drug response was indistinguishable from placebo. The most probable explanation for these findings is that some, currently unknown, genetic variant, which is overrepresented in those with BED, interacts with DAT1 to suppress appetite in response to stimulant administration. The current findings have implications for treatment response to drugs currently in use (or being developed) for the treatment of overeating and overweight.
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Affiliation(s)
- Caroline Davis
- Department of Kinesiology and Health Sciences, York University, Toronto, ON, Canada.
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44
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Abstract
Emerging communications technologies allow us to potentially reach more individuals with effective health-related advice and information at a very low cost. As we begin a new era of "personalized medicine," advances in consumer health informatics will parallel and eventually merge with those being made in bioinformatics (e.g., genomic information), medical informatics (e.g., electronic medical records), and public health informatics (e.g., disease surveillance). This article discusses access, use, quality, and types of eHealth programming with a focus on the Internet as the initial instantiation of this programming. Also discussed are criteria relevant to the dissemination of eHealth programming in real-world settings. Finally, possible directions for future eHealth research are presented.
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Affiliation(s)
- Victor Strecher
- Center for Health Communications Research, University of Michigan, Ann Arbor, MI 48109-0471, USA.
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45
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Zhu H, Lee M, Agatsuma S, Hiroi N. Pleiotropic impact of constitutive fosB inactivation on nicotine-induced behavioral alterations and stress-related traits in mice. Hum Mol Genet 2007; 16:820-36. [PMID: 17468183 DOI: 10.1093/hmg/ddm027] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Multiple genes are thought to influence both susceptibility to nicotine dependence and its comorbid behavioral traits in humans. However, which specific genes contribute to this pleiotropic effect is poorly understood. Previous rodent studies have shown that many addictive substances and stressful stimuli increase the expression of the transcription factor FosB in limbic and associated regions and that the protein products of fosB contribute to certain behavioral effects of cocaine and morphine. However, the role of this gene in nicotine-regulated behaviors and dependence-related behavioral traits is unknown. We tested the hypothesis that a constitutive level of FosB affects nicotine-regulated behaviors and comorbid behavioral traits using constitutive fosB knockout (KO) mice. Following repeated or prolonged nicotine administration, but not a single acute administration, KO mice were impaired in conditioned place preference, oral nicotine intake and motor suppression. In wild-type mice, repeated nicotine injections, but not a single acute injection, increased the expression of FosB and its truncated variant DeltaFosB in the targets but not at the origins of the mesolimbic and nigrostriatal dopamine pathways; no detectable level of FosB/DeltaFosB was found in KO mice. In tasks designed to assess behavioral traits, KO mice exhibited more pronounced behavioral abnormalities when stress levels were high than when they were minimized. Our results suggest that the constitutive absence of fosB has a pleiotropic influence on the behavioral effects of repeated or prolonged nicotine administration and on stress-related behavioral traits in mice.
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Affiliation(s)
- Hongwen Zhu
- Laboratory of Molecular Psychobiology, Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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46
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Tercyak KP, Peshkin BN, Abraham A, Wine L, Walker LR. Interest in genetic counseling and testing for adolescent nicotine addiction susceptibility among a sample of adolescent medicine providers attending a scientific conference on adolescent health. J Adolesc Health 2007; 41:42-50. [PMID: 17577533 PMCID: PMC2171031 DOI: 10.1016/j.jadohealth.2007.02.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2006] [Revised: 02/21/2007] [Accepted: 02/28/2007] [Indexed: 10/23/2022]
Abstract
PURPOSE Preventing adolescents from smoking and becoming addicted to nicotine is an important public health issue. New research on the genetics of susceptibility to nicotine addition is emerging and may eventually help to identify adolescents at high risk. Over time, genetic counseling and testing for nicotine addiction susceptibility may become incorporated into tobacco control practice, and providers in primary care settings are likely to be at the forefront of these services. As such, it is important to understand the attitudes and practices of adolescent medicine providers toward tobacco control and genetic testing to anticipate better the needs and interests of these individuals and prepare for the future. This study describes adolescent medicine providers' interest, and correlates of their interest, in genetic counseling and testing for nicotine addiction susceptibility among their adolescent patients--a test that is not yet clinically available. METHODS Adolescent medicine providers attending a national scientific conference (N = 232) completed a survey about their patient tobacco control and other screening behaviors, perceptions of their patients' attitudes and beliefs toward tobacco control, and their own attitudes and beliefs about smoking and genetics. RESULTS Providers who engaged in more regular tobacco screening behaviors with their adolescent patients (odds ratio [OR] = 4.07, 95% confidence interval [CI] = 2.20, 7.751, p = .00) and those who were more optimistic that biobehavioral research would lead to significant improvements in adolescent smoking prevention and treatment (OR = 2.47, 95% CI = 1.40, 4.37, p = .00), were more interested in counseling and testing. CONCLUSIONS In the future, adolescent wellness visits may present an opportunity to offer genetic counseling and testing for nicotine addiction susceptibility. Implementation at the provider level may depend on tobacco screening behavior and research optimism. Educating providers about safe and effective adolescent tobacco control strategies incorporating genetics will be essential.
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Affiliation(s)
- Kenneth P Tercyak
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20007, USA.
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47
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Audrain-McGovern J, Al Koudsi N, Rodriguez D, Wileyto EP, Shields PG, Tyndale RF. The role of CYP2A6 in the emergence of nicotine dependence in adolescents. Pediatrics 2007; 119:e264-74. [PMID: 17130279 DOI: 10.1542/peds.2006-1583] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES The objectives of our study were to evaluate whether genetic variation in nicotine metabolic inactivation accounted for the emergence of nicotine dependence from mid- to late adolescence and whether initial smoking experiences mediated this effect. METHODS Participants were 222 adolescents of European ancestry who participated in a longitudinal cohort study of the biobehavioral determinants of adolescent smoking. Survey data were collected annually from grade 9 to the end of grade 12. Self-report measures included nicotine dependence, smoking, age first smoked, initial smoking experiences, peer and household member smoking, and alcohol and marijuana use. DNA collected via buccal swabs was assessed for CYP2A6 alleles that are common in white people and are demonstrated to decrease enzymatic function (CYP2A6*2, *4, *9, *12). RESULTS Latent growth-curve modeling indicated that normal metabolizers (individuals with no detected CYP2A6 variants) progressed in nicotine dependence at a faster rate and that these increases in nicotine dependence leveled off more slowly compared with slower metabolizers (individuals with CYP2A6 variants). Initial smoking experiences did not account for how CYP2A6 genetic variation impacts nicotine dependence. CONCLUSIONS These findings may help to promote a better understanding of the biology of smoking behavior and the emergence of nicotine dependence in adolescents and inform future work aimed at understanding the complex interplay between genetic, social, and psychological factors in adolescent smoking behavior.
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Affiliation(s)
- Janet Audrain-McGovern
- Tobacco Use Research Center, Department of Psychiatry, University of Pennsylvania, 3535 Market St, Philadelphia, PA 19104, USA.
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Gervais A, O'Loughlin J, Meshefedjian G, Bancej C, Tremblay M. Milestones in the natural course of onset of cigarette use among adolescents. CMAJ 2006; 175:255-61. [PMID: 16880445 PMCID: PMC1513423 DOI: 10.1503/cmaj.051235] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND The natural course of onset of cigarette use has been conceptualized as progressing sequentially through 5 stages (preparation, trying, irregular use, regular use, nicotine-dependent smoking). However, recent studies suggest that symptoms of nicotine dependence can occur early in the onset process, raising questions about the validity of this model. The objective of our study was to describe the sequence and timing of 12 milestones (6 related to cigarette use and 6 to symptoms of nicotine dependence) during onset of cigarette use. METHODS Grade 7 students in 10 secondary schools in Montréal (n = 1293) were followed prospectively every 3-4 months for 5 years. Using Kaplan-Meier analysis, we computed the number of months after first puff at which the cumulative probability of attaining each milestone was 25%, among 311 participants who initiated cigarette use during follow-up. RESULTS Inhalation rapidly followed first puff. The cumulative probability of inhalation was 25% at 1.5 months (95% confidence interval [CI] 1.5-2.5). The cumulative probability (and 95% CI) was 2.5 months (1.5-2.5) for mental addiction, 2.5 (1.0-3.0) for smoking a whole cigarette, 4.5 (2.5-8.8) for cravings, 5.4 (3.8-9.7) for physical addiction, 8.8 (7.0-11.9) for monthly smoking, 11.0 (6.4-16.8) for withdrawal symptoms, 13.0 (10.3-20.5) for tolerance, 19.4 (14.5-31.7) for weekly smoking, 19.5 (14.0-23.9) for lifetime total of 100 cigarettes, 23.1 (19.7-37.6) for daily smoking and 40.6 (35.1-56.0) for conversion to tobacco dependence. INTERPRETATION Symptoms of nicotine dependence develop soon after first puff and can precede monthly, weekly and daily smoking. Cessation interventions that manage dependence symptoms may be needed soon after first puff.
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Affiliation(s)
- André Gervais
- Agence de santé et des services sociaux, Direction de santé publique, Montréal, Que
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Agatsuma S, Lee M, Zhu H, Chen K, Shih JC, Seif I, Hiroi N. Monoamine oxidase A knockout mice exhibit impaired nicotine preference but normal responses to novel stimuli. Hum Mol Genet 2006; 15:2721-31. [PMID: 16893910 DOI: 10.1093/hmg/ddl206] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Nicotine is thought to act on brain monoamine systems that normally mediate diverse motivational behaviors. How monoamine-related genes contribute to behavioral traits (e.g. responses to novel stimuli) comorbid with the susceptibility to nicotine addiction is still poorly understood. We examined the impact of constitutive monoamine oxidase A (MAOA) deficiency in mice on nicotine reward and responses to novel stimuli. Age-matched, male Maoa-knockout (KO) mice and wild-type (WT) littermates were tested for nicotine-induced conditioned place preference (CPP); voluntary oral nicotine preference/intake; spontaneous locomotor activity in a novel, inescapable open field; and novelty place preference. Nicotine preference in WT mice was reduced in Maoa-KO mice in the CPP and oral preference/intake tests. Control experiments showed that these phenotypes were not due to abnormalities in nicotine metabolism, fluid intake or response to taste. In contrast, Maoa-KO mice were normal in their behavioral response to a novel, inescapable open field and in their preference for a novel place. The observed phenotypes suggest that a constitutive deficiency of MAOA reduces the rewarding effects of nicotine without altering behavioral responses to novel stimuli in mice. Constitutive MAOA activity levels are likely to contribute to the vulnerability or resiliency to nicotine addiction by altering the rewarding effects of nicotine.
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Affiliation(s)
- Soh Agatsuma
- Laboratory of Molecular Psychobiology, Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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Karp I, O'Loughlin J, Hanley J, Tyndale RF, Paradis G. Risk factors for tobacco dependence in adolescent smokers. Tob Control 2006; 15:199-204. [PMID: 16728750 PMCID: PMC2564659 DOI: 10.1136/tc.2005.014118] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2005] [Accepted: 02/08/2006] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To study the incidence of conversion to tobacco dependence (TD) and the prevalence of the TD state in relation to several potential determinants in a sample of adolescent smokers. METHODS Questionnaires were administered every 3-4 months to document TD symptoms, amount of cigarette consumption, and depression symptoms in a prospective cohort of 1293 grade 7 students in a convenience sample of 10 schools. RESULTS Over 54 months of follow-up, 113 of 344 novice smokers converted to TD. The referent series for the analysis of incidence comprised 823 person-surveys. The prevalence series included 1673 person-surveys, contributed by 429 smokers. Conversion to TD and TD status were associated with the intensity of recent (that is, past 3-month) cigarette consumption (adjusted incidence rate ratio (aIRR) 1.63 (95% confidence interval (CI) 1.36 to 1.97) and adjusted prevalence odds ratio (aPOR) 1.35 (95% CI 1.23 to 2.48) per 100 cigarettes per month), slowest CYP2A6 activity (aIRR 4.19 (95% CI 1.38 to 12.76) and aPOR 2.30 (95% CI 1.29 to 4.09)), depression score (aIRR 1.61 (95% CI 1.17 to 2.21) and aPOR 1.47 (95% CI 1.22, 1.75) per 1-unit change). Additional determinants included, for conversion to TD, time since onset of cigarette use (aIRR 0.76 (95% CI 0.58 to 1.00) per year) and, for the TD state, positive TD status six months ago (aPOR 3.53 (95% CI 2.41 to 5.19)). CONCLUSIONS TD risk in adolescents is associated with intensity of recent cigarette consumption, while the role of more distant cigarette consumption appears small; subjects with slow nicotine metabolism and those with more depression symptoms are at increased risk of becoming tobacco dependent. The risk of being tobacco dependent is considerably higher in subjects who had previously developed the TD state.
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Affiliation(s)
- I Karp
- Department of Epidemiology, Biostatistics, and Occupational Health, Faculty of Medicine, McGill University, Montréal, Québec, Canada
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