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Velioglu HA, Yıldız S, Ozdemir-Oktem E, Cankaya S, Lundmark AK, Ozsimsek A, Hanoglu L, Yulug B. Smoking affects global and regional brain entropy in depression patients regardless of depression: Preliminary findings. J Psychiatr Res 2024; 177:147-152. [PMID: 39018709 DOI: 10.1016/j.jpsychires.2024.07.002] [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: 04/02/2024] [Revised: 06/27/2024] [Accepted: 07/02/2024] [Indexed: 07/19/2024]
Abstract
OBJECTIVE This study examines the effect of smoking on global and regional brain entropy in patients with Major Depressive Disorder (MDD), aiming to elucidate the relationship between smoking habits and brain network complexity in depression. METHODS The study enrolled 24 MDD patients, divided into smokers and non-smokers, from Alanya Alaaddin Keykubat University and Istanbul Medipol University. Resting-state fMRI data were acquired and processed. The complexity of neuronal activity was assessed using dispersion entropy, with statistical significance determined by a suite of tests including Kolmogorov-Smirnov, Student's t-test, and Mann-Whitney U test. RESULTS The smoking cohort exhibited higher global brain entropy compared to the non-smoking group (p = 0.033), with significant differences in various brain networks, indicating that smoking may alter global brain activity and network dynamics in individuals with MDD. CONCLUSION The study provides evidence that smoking is associated with increased brain entropy in MDD patients, suggesting that chronic smoking may influence cognitive and emotional networks. This underscores the importance of considering smoking history in the treatment and prognosis of MDD. The findings call for further research to understand the mechanistic links between smoking, brain entropy, and depression.
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Affiliation(s)
- Halil Aziz Velioglu
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY, USA; Functional Imaging and Cognitive-Affective Neuroscience Lab (fINCAN), Health Sciences and Technology Research Institute (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Sultan Yıldız
- School of Engineering and Natural Sciences, Istanbul Medipol University, Istanbul, Turkey; Program of Neuroscience Ph.D., Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, Turkey
| | - Ece Ozdemir-Oktem
- Department of Neurology, School of Medicine, Alanya Alaaddin Keykubat University, Alanya, Turkey
| | - Seyda Cankaya
- Department of Neurology, School of Medicine, Alanya Alaaddin Keykubat University, Alanya, Turkey
| | | | - Ahmet Ozsimsek
- Department of Neurology, School of Medicine, Alanya Alaaddin Keykubat University, Alanya, Turkey
| | - Lütfü Hanoglu
- Department of Neurology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Burak Yulug
- Department of Neurology, School of Medicine, Alanya Alaaddin Keykubat University, Alanya, Turkey.
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Dalvie S, Koen N, McGregor N, O'Connell K, Warnich L, Ramesar R, Nievergelt CM, Stein DJ. Toward a Global Roadmap for Precision Medicine in Psychiatry: Challenges and Opportunities. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2016; 20:557-564. [PMID: 27636104 DOI: 10.1089/omi.2016.0110] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Mental disorders represent a major public health burden worldwide. This is likely to rise in the next decade, with the highest increases predicted to occur in low- and middle-income countries. Current psychotropic medication treatment guidelines focus on uniform approaches to the treatment of heterogeneous disorders and achieve only partial therapeutic success. Developing a global precision medicine approach in psychiatry appears attractive, given the value of this approach in other fields of medicine, such as oncology and infectious diseases. In this horizon scanning analysis, we review the salient opportunities and challenges for precision medicine in psychiatry over the next decade. Variants within numerous genes involved in a range of pathways have been implicated in psychotropic drug response and might ultimately be used to guide choice of pharmacotherapy. Multipronged approaches such as multi-omics (genomics, proteomics, metabolomics) analyses and systems diagnostics together with high-throughput sequencing and genotyping technologies hold promise for identifying precise and targeted treatments in mental disorders. To date, however, the vast majority of pharmacogenomics work has been undertaken in high-income countries on a relatively small proportion of the global population, and many other challenges face the field. Opportunities and challenges for establishing a global roadmap for precision medicine in psychiatry are discussed in this article.
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Affiliation(s)
- Shareefa Dalvie
- 1 Department of Psychiatry and Mental Health, University of Cape Town , Cape Town, South Africa .,2 MRC/UCT Human Genetics Research Unit, Division of Human Genetics, University of Cape Town , Cape Town, South Africa
| | - Nastassja Koen
- 1 Department of Psychiatry and Mental Health, University of Cape Town , Cape Town, South Africa .,3 Medical Research Council (MRC) Unit on Anxiety and Stress Disorders , Cape Town, South Africa
| | - Nathaniel McGregor
- 4 Department of Genetics, Stellenbosch University , Tygerberg, South Africa .,5 Department of Psychiatry, Stellenbosch University , Tygerberg, South Africa
| | - Kevin O'Connell
- 4 Department of Genetics, Stellenbosch University , Tygerberg, South Africa
| | - Louise Warnich
- 4 Department of Genetics, Stellenbosch University , Tygerberg, South Africa
| | - Raj Ramesar
- 2 MRC/UCT Human Genetics Research Unit, Division of Human Genetics, University of Cape Town , Cape Town, South Africa
| | - Caroline M Nievergelt
- 6 Department of Psychiatry, University of California San Diego , San Diego, California.,7 Veteran Affairs (VA) San Diego Center of Excellence for Stress and Mental Health , San Diego, California
| | - Dan J Stein
- 1 Department of Psychiatry and Mental Health, University of Cape Town , Cape Town, South Africa .,3 Medical Research Council (MRC) Unit on Anxiety and Stress Disorders , Cape Town, South Africa
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Hyper-resting brain entropy within chronic smokers and its moderation by Sex. Sci Rep 2016; 6:29435. [PMID: 27377552 PMCID: PMC4932513 DOI: 10.1038/srep29435] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 06/17/2016] [Indexed: 01/29/2023] Open
Abstract
Cigarette smoking is a chronic relapsing brain disorder, and remains a premier cause of morbidity and mortality. Functional neuroimaging has been used to assess differences in the mean strength of brain activity in smokers’ brains, however less is known about the temporal dynamics within smokers’ brains. Temporal dynamics is a key feature of a dynamic system such as the brain, and may carry information critical to understanding the brain mechanisms underlying cigarette smoking. We measured the temporal dynamics of brain activity using brain entropy (BEN) mapping and compared BEN between chronic non-deprived smokers and non-smoking controls. Because of the known sex differences in neural and behavioral smoking characteristics, comparisons were also made between males and females. Associations between BEN and smoking related clinical measures were assessed in smokers. Our data showed globally higher BEN in chronic smokers compared to controls. The escalated BEN was associated with more years of smoking in the right limbic area and frontal region. Female nonsmokers showed higher BEN than male nonsmokers in prefrontal cortex, insula, and precuneus, but the BEN sex difference in smokers was less pronounced. These findings suggest that BEN mapping may provide a useful tool for probing brain mechanisms related to smoking.
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Trojak B, Meille V, Achab S, Lalanne L, Poquet H, Ponavoy E, Blaise E, Bonin B, Chauvet-Gelinier JC. Transcranial Magnetic Stimulation Combined With Nicotine Replacement Therapy for Smoking Cessation: A Randomized Controlled Trial. Brain Stimul 2015; 8:1168-74. [PMID: 26590478 DOI: 10.1016/j.brs.2015.06.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/06/2015] [Accepted: 06/07/2015] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Further evidence suggests that repetitive Transcranial Magnetic Stimulation (rTMS) is an effective method to reduce tobacco craving among smokers. HYPOTHESIS As relapse is common within a few days after smoking cessation, we hypothesized that combining the anti-craving effects of rTMS with Nicotine replacement therapy (NRT) to attenuate withdrawal symptoms could increase abstinence rates in smokers with severe nicotine dependence who quit smoking. METHODS Thirty-seven smokers who failed to quit with the usual treatments were randomly assigned to two treatment groups to receive either active (n = 18) or sham (n = 19) 1-Hz rTMS of the right dorsolateral prefrontal cortex. The day after quitting smoking, each patient combined NRT (21-mg patch) with active or sham rTMS (10 sessions) for 2 weeks. Cessation support was then continued with NRT alone using lower-dose patches. Abstinence rates and self-report craving scales were used to assess the therapeutic results during the combined treatment and for up to 12 weeks after quitting. RESULTS At the end of the combined treatment, there were significantly more abstinent participants in the active rTMS group (n = 16) than in the sham rTMS group (n = 9) (P = 0.027). The craving scales analysis revealed that active rTMS (P = 0.011) but not sham rTMS (P = 0.116) led to a significant decrease in the compulsive factor. However, no lasting rTMS effect was found. CONCLUSIONS 1-Hz rTMS combined with NRT improved the success rate of abstinence in smokers during tobacco cessation. The stimulation-induced reduction in compulsivity may explain this result.
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Affiliation(s)
- Benoit Trojak
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France; EA 4452, LPPM, University of Burgundy, 21000 Dijon, France.
| | - Vincent Meille
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France
| | - Sophia Achab
- Addiction Division, Department of Mental Health and Psychiatry, University Hospitals of Geneva, 1202 Geneva, Switzerland
| | - Laurence Lalanne
- Department of Psychiatry, Strasbourg University Hospital, 67091 Strasbourg, France; INSERM U 1114, FMTS, Strasbourg University Hospital, 67091 Strasbourg, France
| | - Hélène Poquet
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France
| | - Eddy Ponavoy
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France
| | - Emilie Blaise
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France
| | - Bernard Bonin
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France; EA 4452, LPPM, University of Burgundy, 21000 Dijon, France
| | - Jean-Christophe Chauvet-Gelinier
- Department of Psychiatry and Addictology, University Hospital of Dijon, 21079 Dijon, France; EA 4452, LPPM, University of Burgundy, 21000 Dijon, France
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Blum K, Thanos PK, Badgaiyan RD, Febo M, Oscar-Berman M, Fratantonio J, Demotrovics Z, Gold MS. Neurogenetics and gene therapy for reward deficiency syndrome: are we going to the Promised Land? Expert Opin Biol Ther 2015; 15:973-85. [PMID: 25974314 DOI: 10.1517/14712598.2015.1045871] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Addiction is a substantial health issue with limited treatment options approved by the FDA and as such currently available. The advent of neuroimaging techniques that link neurochemical and neurogenetic mechanisms to the reward circuitry brain function provides a framework for potential genomic-based therapies. AREAS COVERED Through candidate and genome-wide association studies approaches, many gene polymorphisms and clusters have been implicated in drug, food and behavioral dependence linked by the common rubric reward deficiency syndrome (RDS). The results of selective studies that include the role of epigenetics, noncoding micro RNAs in RDS behaviors especially drug abuse involving alcohol, opioids, cocaine, nicotine, pain and feeding are reviewed in this article. New targets for addiction treatment and relapse prevention, treatment alternatives such as gene therapy in animal models, and pharmacogenomics and nutrigenomics methods to manipulate transcription and gene expression are explored. EXPERT OPINION The recognition of the clinical benefit of early genetic testing to determine addiction risk stratification and dopaminergic agonistic, rather than antagonistic therapies are potentially the genomic-based wave of the future. In addition, further development, especially in gene transfer work and viral vector identification, could make gene therapy for RDS a possibility in the future.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry & McKnight Brain Institute, University of Florida College of Medicine , Gainesville, FL , USA
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6
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Pharmacologically, are smokers the same as non-smokers? Curr Opin Pharmacol 2014; 14:42-9. [DOI: 10.1016/j.coph.2013.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 11/03/2013] [Accepted: 11/05/2013] [Indexed: 12/18/2022]
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Neuroimaging in psychiatric pharmacogenetics research: the promise and pitfalls. Neuropsychopharmacology 2013; 38:2327-37. [PMID: 23793356 PMCID: PMC3799069 DOI: 10.1038/npp.2013.152] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 06/10/2013] [Accepted: 06/10/2013] [Indexed: 12/22/2022]
Abstract
The integration of research on neuroimaging and pharmacogenetics holds promise for improving treatment for neuropsychiatric conditions. Neuroimaging may provide a more sensitive early measure of treatment response in genetically defined patient groups, and could facilitate development of novel therapies based on an improved understanding of pathogenic mechanisms underlying pharmacogenetic associations. This review summarizes progress in efforts to incorporate neuroimaging into genetics and treatment research on major psychiatric disorders, such as schizophrenia, major depressive disorder, bipolar disorder, attention-deficit/hyperactivity disorder, and addiction. Methodological challenges include: performing genetic analyses in small study populations used in imaging studies; inclusion of patients with psychiatric comorbidities; and the extensive variability across studies in neuroimaging protocols, neurobehavioral task probes, and analytic strategies. Moreover, few studies use pharmacogenetic designs that permit testing of genotype × drug effects. As a result of these limitations, few findings have been fully replicated. Future studies that pre-screen participants for genetic variants selected a priori based on drug metabolism and targets have the greatest potential to advance the science and practice of psychiatric treatment.
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Lee JH, Kim J, Yoo SS. Real-time fMRI-based neurofeedback reinforces causality of attention networks. Neurosci Res 2012; 72:347-54. [DOI: 10.1016/j.neures.2012.01.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 01/10/2012] [Accepted: 01/11/2012] [Indexed: 11/24/2022]
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Abstract
The application of genomic medicine to the treatment of nicotine dependence holds great promise for revitalizing the steady decline in smoking rates witnessed in the USA over the past several decades. This paper examines the current knowledge base concerning the use of biomarkers to guide the selection of nicotine dependence treatments. First, we review the neurobiology of nicotine dependence and present evidence that supports its heritability. We then discuss the various studies of pharmacokinetic and pharmacodynamic genes related to therapeutic response. Current evidence suggests that biomarkers of genetic variability in both nicotine metabolism, referred to as the nicotine metabolite ratio, and dopamine genotypes may be useful for guiding treatment selection for nicotine dependence. Barriers to the translation of this research to clinical practice are discussed, as are directions for future research.
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Affiliation(s)
- Robert A Schnoll
- Pulmonary, Allergy & Critical Care Division, University of Pennsylvania, Presbyterian Medical Center -1 PHI, 51 N 39th Street, Philadelphia, PA 19104, USA.
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Wing VC, Wass CE, Soh DW, George TP. A review of neurobiological vulnerability factors and treatment implications for comorbid tobacco dependence in schizophrenia. Ann N Y Acad Sci 2011; 1248:89-106. [DOI: 10.1111/j.1749-6632.2011.06261.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Liao Y, Tang J, Deng Q, Deng Y, Luo T, Wang X, Chen H, Liu T, Chen X, Brody AL, Hao W. Bilateral fronto-parietal integrity in young chronic cigarette smokers: a diffusion tensor imaging study. PLoS One 2011; 6:e26460. [PMID: 22069452 PMCID: PMC3206030 DOI: 10.1371/journal.pone.0026460] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 09/27/2011] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Cigarette smoking continues to be the leading cause of preventable morbidity and mortality in China and other countries. Previous studies have demonstrated gray matter loss in chronic smokers. However, only a few studies assessed the changes of white matter integrity in this group. Based on those previous reports of alterations in white matter integrity in smokers, the aim of this study was to examine the alteration of white matter integrity in a large, well-matched sample of chronic smokers and non-smokers. METHODOLOGY/PRINCIPAL FINDINGS Using in vivo diffusion tensor imaging (DTI) to measure the differences of whole-brain white matter integrity between 44 chronic smoking subjects (mean age, 28.0±5.6 years) and 44 healthy age- and sex-matched comparison non-smoking volunteers (mean age, 26.3±5.8 years). DTI was performed on a 3-Tesla Siemens scanner (Allegra; Siemens Medical System). The data revealed that smokers had higher fractional anisotropy (FA) than healthy non-smokers in almost symmetrically bilateral fronto-parietal tracts consisting of a major white matter pathway, the superior longitudinal fasciculus (SLF). CONCLUSION/SIGNIFICANCE We found the almost symmetrically bilateral fronto-parietal whiter matter changes in a relatively large sample of chronic smokers. These findings support the hypothesis that chronic cigarette smoking involves alterations of bilateral fronto-parietal connectivity.
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Affiliation(s)
- Yanhui Liao
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Jinsong Tang
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Qijian Deng
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Yongwen Deng
- Department of Neurosurgery, People's Hospital of Hunan Province, Changsha, People's Republic of China
| | - Tao Luo
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Xuyi Wang
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Hongxian Chen
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Tieqiao Liu
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Xiaogang Chen
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Arthur L. Brody
- Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles School of Medicine, Los Angeles, California, United States of America
- Departments of Psychiatry and Research, Greater Los Angeles VA Healthcare System, Los Angeles, California, United States of America
| | - Wei Hao
- Mental Health Institute, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
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Hrubá D, Zaloudíková I. Why to smoke? Why not to smoke? Major reasons for children's decisions on whether or not to smoke. Cent Eur J Public Health 2011; 18:202-8. [PMID: 21361104 DOI: 10.21101/cejph.a3626] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
UNLABELLED This study, aimed at the primary prevention of smoking behaviour in children and adolescents, attempts to find the main factors that distinguish smokers and non-smokers in the period of their first experimentation with cigarettes. There are only a few studies dealing with investigations into current motivations of teenagers as to whether or not to smoke. The programme entitled "Normal is not to smoke", using evaluation questionnaires given to children in the 3rd and 5th classes, also contains--among many other things--specifics on reasons children have for making the decision whether to become a smoker or non-smoker. The results are reported in this paper. METHODOLOGY Responses concerning potential inclination to smoking that were collected from children on the basis of questionnaires were categorized into the following groups: image, the influence of a role model, the effects of smoking, curiosity. Reasons for non-smoking were categorized into the following groups: health, aesthetic, economic, restrictive, other aspects. Children were also asked to describe smokers by using three pairs of opposite characteristics: education, success, wealth. The frequencies of answers were analysed for the whole set, for boys and girls and for children with different smoking behaviour; the differences were evaluated using the statistical programme EPI INFO, version 6. RESULTS A total of 1153 children in the 3rd class and 799 children in the 5th class completed the questionnaire. Motivations for smoking were given by nearly 17% of children in the 3rd class and by nearly 27% of the same cohort in the 5th class. Aspects such as image (41.9% vs. 46.2%) were mentioned most frequently, by boys more frequently than by girls (OR 1.77; 95% CI 0.93-3.36; p = 0.06), by children from smokers' families more frequently than by children from non-smokers' families (OR 1.33; 95% CI 0.69-2.57; p = 0.3) and more frequently by children with repeated attempts to smoke (OR 3.93; 95% CI 2.32-6.65) or children who had only had a single smoking attempt (OR 3.18; 95% CI 1.52-6.75). Also the role of models (parents, relatives, friends) was often mentioned (12.9% in the 3rd class and 10.2% in the 5th class). Potential beneficial effects of smoking were expressed by 13% of children in the 3rd class and by 55% of children in the 5th class (p < 0.0001). About 40% of children considered smoking as effective coping with stress and about 20% of them declared smoking for mood improvement. Beneficial effects of smoking significantly more often described children with repeated smoking attempts (OR 2.91; 95% CI 1.73-4.89; p < 0.001). Children often linked smoking to the less educated and less successful social groups but also to the rich. In both investigations, health aspects were the most common reasons for choosing not to smoke (69.2% vs. 73.3%), being more frequently presented by girls and non-smokers. A significant shift in the negative aesthetic perception of smoking (14.1% in the 3rd class vs. 40.2% in the 5th class) and economic disadvantages of smoking (3.9% vs. 24.8%) was observed in the given period of time. Restrictive reasons were given only rarely by pupils in the 3rd class (0.7%), unlike pupils in the 5th class who feared the reaction of their parents (24.8%). CONCLUSION Our study provides an overview of current motivations in children aged 9 and 11 years that are crucial for their future smoking/nonsmoking behaviour. The results of the study are important for developing a strategy for the primary prevention of smoking in school programmes and for introducing a general social approach to address the problem of the decreasing age of smoking initiation.
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Affiliation(s)
- Drahoslava Hrubá
- Department of Preventive Medicine, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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Perkins KA, Lerman C. Early human screening of medications to treat drug addiction: novel paradigms and the relevance of pharmacogenetics. Clin Pharmacol Ther 2011; 89:460-3. [PMID: 21270792 DOI: 10.1038/clpt.2010.254] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- K A Perkins
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
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Perry JL, Joseph JE, Jiang Y, Zimmerman RS, Kelly TH, Darna M, Huettl P, Dwoskin LP, Bardo MT. Prefrontal cortex and drug abuse vulnerability: translation to prevention and treatment interventions. ACTA ACUST UNITED AC 2010; 65:124-49. [PMID: 20837060 DOI: 10.1016/j.brainresrev.2010.09.001] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Revised: 08/19/2010] [Accepted: 09/02/2010] [Indexed: 01/25/2023]
Abstract
Vulnerability to drug abuse is related to both reward seeking and impulsivity, two constructs thought to have a biological basis in the prefrontal cortex (PFC). This review addresses similarities and differences in neuroanatomy, neurochemistry and behavior associated with PFC function in rodents and humans. Emphasis is placed on monoamine and amino acid neurotransmitter systems located in anatomically distinct subregions: medial prefrontal cortex (mPFC); lateral prefrontal cortex (lPFC); anterior cingulate cortex (ACC); and orbitofrontal cortex (OFC). While there are complex interconnections and overlapping functions among these regions, each is thought to be involved in various functions related to health-related risk behaviors and drug abuse vulnerability. Among the various functions implicated, evidence suggests that mPFC is involved in reward processing, attention and drug reinstatement; lPFC is involved in decision-making, behavioral inhibition and attentional gating; ACC is involved in attention, emotional processing and self-monitoring; and OFC is involved in behavioral inhibition, signaling of expected outcomes and reward/punishment sensitivity. Individual differences (e.g., age and sex) influence functioning of these regions, which, in turn, impacts drug abuse vulnerability. Implications for the development of drug abuse prevention and treatment strategies aimed at engaging PFC inhibitory processes that may reduce risk-related behaviors are discussed, including the design of effective public service announcements, cognitive exercises, physical activity, direct current stimulation, feedback control training and pharmacotherapies. A major challenge in drug abuse prevention and treatment rests with improving intervention strategies aimed at strengthening PFC inhibitory systems among at-risk individuals.
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Affiliation(s)
- Jennifer L Perry
- Center for Drug Abuse Research Translation, University of Kentucky, Lexington, KY 40536-0509, USA
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Lerman C, Audrain-McGovern J. Reinforcing effects of smoking: more than a feeling. Biol Psychiatry 2010; 67:699-701. [PMID: 20362220 PMCID: PMC2857778 DOI: 10.1016/j.biopsych.2010.02.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 02/20/2010] [Indexed: 12/27/2022]
Affiliation(s)
- Caryn Lerman
- Transdisciplinary Tobacco Use Research Center, Department of Psychiatry and Abramson Cancer Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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Herbert LJ, Walker LR, Sharff ME, Abraham AA, Tercyak KP. Are adolescents with ADHD interested in genetic testing for nicotine addiction susceptibility? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2010; 7:1694-707. [PMID: 20617054 PMCID: PMC2872360 DOI: 10.3390/ijerph7041694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 03/11/2010] [Accepted: 04/09/2010] [Indexed: 12/23/2022]
Abstract
It has been well-established that some adolescents diagnosed with attention-deficit/hyperactivity disorder (ADHD) are at increased risk for cigarette smoking. Current research on the genetic basis of this association could ultimately translate into genetic tests capable of identifying smoking-prone adolescents with ADHD. In this study we examined 81 ADHD affected adolescents’ (age 13–21) interest in genetic testing for nicotine addiction susceptibility. Fifty-seven percent of adolescents indicated a fair amount of interest or more in testing. Most adolescents indicated that the personal information revealed from testing would be either useful (29%) or interesting (37%). Implications for genetically-informed smoking prevention and cessation interventions in high risk adolescents with ADHD are discussed.
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Affiliation(s)
- Linda J. Herbert
- University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA; E-Mail:
| | - Leslie R. Walker
- Seattle Children’s Hospital, 4800 Sand Point Way NE, Seattle, WA 98105, USA; E-Mail:
| | - McKane E. Sharff
- Georgetown University Medical Center, 3300 Whitehaven Street, NW, Washington, DC 20007, USA; E-Mails:
(M.E.S.);
(A.A.A.)
| | - Anisha A. Abraham
- Georgetown University Medical Center, 3300 Whitehaven Street, NW, Washington, DC 20007, USA; E-Mails:
(M.E.S.);
(A.A.A.)
| | - Kenneth P. Tercyak
- Georgetown University Medical Center, 3300 Whitehaven Street, NW, Washington, DC 20007, USA; E-Mails:
(M.E.S.);
(A.A.A.)
- Author to whom correspondence should be addressed; E-Mail:
; Tel.: +1-202-687-0802; Fax: +1-202-687-8444
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17
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Mobascher A, Rujescu D, Mittelstraß K, Giegling I, Lamina C, Nitz B, Brenner H, Fehr C, Breitling LP, Gallinat J, Rothenbacher D, Raum E, Müller H, Ruppert A, Hartmann AM, Möller HJ, Gal A, Gieger C, Wichmann HE, Illig T, Dahmen N, Winterer G. Association of a variant in the muscarinic acetylcholine receptor 2 gene (CHRM2) with nicotine addiction. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:684-690. [PMID: 19644963 DOI: 10.1002/ajmg.b.31011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Genetic factors contribute to the overall risk of developing nicotine addiction, which is the major cause of preventable deaths in western countries. However, knowledge regarding specific polymorphisms influencing smoking phenotypes remains scarce. In the present study we provide evidence that a common single nucleotide polymorphism (SNP) in the 5' untranslated region of CHRM2, the gene coding for the muscarinic acetylcholine receptor 2 is associated with nicotine addiction. CHRM2 was defined as a candidate gene for nicotine addiction based on previous evidence that linked variations in CHRM2 to alcohol and drug dependence. A total of more than 5,500 subjects representative of the German population were genotyped and assessed regarding their smoking habits. The impact of three SNPs in CHRM2 on smoking behavior/nicotine addiction was investigated using logistic regression models or a quasi-Poisson regression model, respectively. We found the T allele of SNP rs324650 to be associated with an increased risk of smoking/nicotine dependence according to three different models, the recessive models of regular or heavy smokers vs. never-smokers (odds ratio 1.17 in both analyses) and according to the Fagerström index of nicotine addiction. In the analysis stratified by gender this association was only found in females. Our data provide further evidence that variations in CHRM2 may be associated with the genetic risk of addiction in general or with certain personality traits that predispose to the development of addiction. Alternatively, variations in CHRM2 could modulate presynaptic auto-regulation in cholinergic systems and may thereby affect an individual's response to nicotine more specifically.
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Affiliation(s)
- A Mobascher
- Department of Psychiatry, Neuropsychiatric Research Laboratory, Heinrich-Heine University, Duesseldorf, Germany.,Institute of Neurosciences and Biophysics, Helmholtz Research Center, Juelich, Germany
| | - D Rujescu
- Department of Psychiatry, Division of Molecular and Clinical Neurobiology, Ludwig-Maximilians-University, Munich, Germany.,Department of Psychiatry, Ludwig-Maximilians-University, Munich, Germany
| | - K Mittelstraß
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - I Giegling
- Department of Psychiatry, Division of Molecular and Clinical Neurobiology, Ludwig-Maximilians-University, Munich, Germany.,Department of Psychiatry, Ludwig-Maximilians-University, Munich, Germany
| | - C Lamina
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Neuherberg, Germany.,Department of Medical Genetics, Molecular and Clinical Pharmacology, Division of Genetic Epidemiology, Innsbruck Medical University, Innsbruck, Austria
| | - B Nitz
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - H Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - C Fehr
- Department of Psychiatry, University of Mainz, Mainz, Germany
| | - L P Breitling
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - J Gallinat
- Department of Psychiatry, Charité University Medicine Berlin, Campus Mitte, Berlin, Germany
| | - D Rothenbacher
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - E Raum
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - H Müller
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - A Ruppert
- Genetics Research Centre GmbH, Munich, Germany
| | - A M Hartmann
- Department of Psychiatry, Division of Molecular and Clinical Neurobiology, Ludwig-Maximilians-University, Munich, Germany.,Department of Psychiatry, Ludwig-Maximilians-University, Munich, Germany
| | - H J Möller
- Department of Psychiatry, Ludwig-Maximilians-University, Munich, Germany
| | - A Gal
- Institute for Human Genetics, University of Hamburg Medical Center Eppendorf, Hamburg, Germany
| | - Ch Gieger
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - H E Wichmann
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - T Illig
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Neuherberg, Germany
| | - N Dahmen
- Department of Psychiatry, University of Mainz, Mainz, Germany
| | - G Winterer
- Department of Psychiatry, Neuropsychiatric Research Laboratory, Heinrich-Heine University, Duesseldorf, Germany.,Institute of Neurosciences and Biophysics, Helmholtz Research Center, Juelich, Germany
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18
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Gwinn M, Guessous I, Khoury MJ. Invited commentary: genes, environment, and hybrid vigor. Am J Epidemiol 2009; 170:703-7. [PMID: 19671836 DOI: 10.1093/aje/kwp221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In the 1950s, case-control studies of smoking and lung cancer established a paradigm for epidemiologic studies of risk factors for chronic diseases. Since then, thousands of case-control studies have examined possible associations of countless risk factors with numerous diseases, rarely finding associations as strong or consistent as that of smoking with lung cancer. Recently, researchers have applied advances in molecular genetics to conduct candidate gene and genome-wide association studies of lung cancer. Skeptics among both epidemiologists and geneticists have argued that genomic research adds little value when most cases of disease can be attributed to a preventable exposure; however, well-conducted studies of gene-environment interactions that draw on data from more than 50 years of research in toxicology, pathophysiology, and behavioral science offer important models for the development of more comprehensive approaches to understanding the etiology of chronic diseases.
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Affiliation(s)
- Marta Gwinn
- Office of Public Health Genomics, Centers for Disease Control and Prevention, Atlanta, Georgia 30341 , USA.
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19
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Dome P, Lazary J, Kalapos MP, Rihmer Z. Smoking, nicotine and neuropsychiatric disorders. Neurosci Biobehav Rev 2009; 34:295-342. [PMID: 19665479 DOI: 10.1016/j.neubiorev.2009.07.013] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/23/2009] [Accepted: 07/30/2009] [Indexed: 12/20/2022]
Abstract
Tobacco smoking is an extremely addictive and harmful form of nicotine (NIC) consumption, but unfortunately also the most prevalent. Although disproportionately high frequencies of smoking and its health consequences among psychiatric patients are widely known, the neurobiological background of this epidemiological association is still obscure. The diverse neuroactive effects of NIC and some other major tobacco smoke constituents in the central nervous system may underlie this association. This present paper summarizes the pharmacology of NIC and its receptors (nAChR) based on a systematic review of the literature. The role of the brain's reward system(s) in NIC addiction and the results of functional and structural neuroimaging studies on smoking-related states and behaviors (i.e. dependence, craving, withdrawal) are also discussed. In addition, the epidemiological, neurobiological, and genetic aspects of smoking in several specific neuropsychiatric disorders are reviewed and the clinical relevance of smoking in these disease states addressed.
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Affiliation(s)
- Peter Dome
- Department of Clinical and Theoretical Mental Health, Kutvolgyi Clinical Center, Semmelweis University, Faculty of Medicine, Kutvolgyi ut 4, 1125 Budapest, Hungary.
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