1
|
Lai YL, Gan CCR, Nfor ON, Lu WY, Lee SS, Liaw YP. The association between smoking cessation and lifestyle/genetic variant rs6265 among the adult population in Taiwan. Sci Rep 2023; 13:22622. [PMID: 38114721 PMCID: PMC10730844 DOI: 10.1038/s41598-023-48806-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 11/30/2023] [Indexed: 12/21/2023] Open
Abstract
Recent studies showed significant associations between socio-demographic, lifestyle factors, polymorphic variant rs6265, and smoking cessation behaviours. We examined rs6265 TT, TC and CC genotypes and their association with socio-demographic and other variables, including mental health status, drinking, exercise, and smoking behaviour among Taiwanese adults. Data on rs6265 were retrieved from the Taiwan Biobank, which contained genetic data collected between 2008 to 2019 from 20,584 participants (aged 30-70 years). Participants who smoked for more than 6 months prior to enrolment were categorized as smokers. If they had smoked and later quit for more than 6 months, they were classified as former smokers. Information regarding drinking, exercise, depression, and bipolar disorder were obtained through questionnaires and were categorized as either as affirmative (yes) or negative (no) responses. In contrast to previous studies, we found that the association between the polymorphism rs6265 and smoking behaviour was not significant (P-value = 0.8753). Males with lower education levels, young persons, and alcohol drinkers showed significant smoking behaviours (P-value < .0001). This population-based study indicates that rs6265 has no significant correlations with smoking cessation behaviour among adults in Taiwan.
Collapse
Affiliation(s)
- Yi-Ling Lai
- Department of Public Health and Institute of Public Health, Chung Shan Medical University, Taichung, 40201, Taiwan
- Community Health Center, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung, 427213, Taiwan
| | - Connie Cai Ru Gan
- Centre for Environment and Population Health, School of Medicine and Dentistry, Griffith University, Nathan, QLD, Australia
| | - Oswald Ndi Nfor
- Department of Public Health and Institute of Public Health, Chung Shan Medical University, Taichung, 40201, Taiwan
| | - Wen-Yu Lu
- Department of Public Health and Institute of Public Health, Chung Shan Medical University, Taichung, 40201, Taiwan
| | - Shiuan-Shinn Lee
- Department of Public Health and Institute of Public Health, Chung Shan Medical University, Taichung, 40201, Taiwan
| | - Yung-Po Liaw
- Department of Public Health and Institute of Public Health, Chung Shan Medical University, Taichung, 40201, Taiwan.
- Institute of Medicine, Chung Shan Medical University, Taichung , 40201, Taiwan.
- Department of Medical Imaging, Chung Shan Medical University Hospital, Taichung, 40201, Taiwan.
| |
Collapse
|
2
|
Pivac N, Nedic Erjavec G, Sagud M, Nikolac Perkovic M, Tudor L, Uzun S, Kovacic Petrovic Z, Konjevod M, Dvojkovic A, Kozumplik O, Svob Strac D, Peraica T, Mimica N, Zivkovic M, Hirasawa-Fujita M, Domino EF. The association between BDNF C270T genetic variants and smoking in patients with mental disorders and in healthy controls. Prog Neuropsychopharmacol Biol Psychiatry 2022; 113:110452. [PMID: 34637871 DOI: 10.1016/j.pnpbp.2021.110452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 09/27/2021] [Accepted: 10/05/2021] [Indexed: 11/25/2022]
Abstract
Studies investigating the association between smoking and the brain-derived neurotrophic factor (BDNF) Val66Met polymorphism have reported inconclusive results, while the studies on the association of smoking status with BDNF C270T polymorphism are missing. We aimed to determine the association of smoking and BDNF Val66Met and C270T genetic variants in control subjects and patients with mental disorders. This study included 3502 Caucasian subjects: 918 healthy controls and 2584 patients with mental disorders (519 individuals with posttraumatic stress disorder (PTSD), 419 patients with depression, 996 patients with schizophrenia, and 650 patients with alcohol dependence). The frequency of the BDNF Val66Met and C270T variants were presented in codominant, dominant and recessive models. BDNF C270T, but not BDNF Val66Met polymorphism, was significantly associated with smoking in all groups, since the presence of the C270T T allele was more frequently found in smokers compared to non-smokers. Significant predictors of smoking were sex, age and BDNF C270T genetic variants. However, after detailed analysis of the separate diagnostic entities, the significant association of BDNF C270T polymorphism was confirmed only in healthy subjects, but not in patients with mental disorders; and was not related to number of cigarettes smoked per day. In patients with alcohol dependence, the severity of smoking was significantly associated with BDNF Val66Met variants. This is a first report of the significant association between the BDNF C270T polymorphism and smoking status in the large groups of Caucasian cases/controls.
Collapse
Affiliation(s)
- Nela Pivac
- Rudjer Boskovic Institute, Zagreb, Croatia.
| | | | - Marina Sagud
- University Hospital Center Zagreb, Zagreb, Croatia; The University of Zagreb School of Medicine, Zagreb, Croatia
| | | | | | - Suzana Uzun
- University Psychiatric Hospital Vrapce, Zagreb, Croatia; School of Medicine, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Zrnka Kovacic Petrovic
- The University of Zagreb School of Medicine, Zagreb, Croatia; University Psychiatric Hospital Vrapce, Zagreb, Croatia
| | | | | | - Oliver Kozumplik
- University Psychiatric Hospital Vrapce, Zagreb, Croatia; School of Medicine, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | | | | | - Ninoslav Mimica
- The University of Zagreb School of Medicine, Zagreb, Croatia; University Psychiatric Hospital Vrapce, Zagreb, Croatia
| | | | | | - Edward F Domino
- University of Michigan, Department of Pharmacology, Ann Arbor, MI, USA
| |
Collapse
|
3
|
Consequences of the rs6265 (Val66Met) polymorphism in the BDNF gene in selected mental disorders and sport. CURRENT PROBLEMS OF PSYCHIATRY 2022. [DOI: 10.2478/cpp-2022-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Introduction: Brain-derived neurotrophic factor (BDNF) is a polypeptide of 247 amino acid residues and is widely distributed throughout the central nervous system of the CNS. It plays an important role in the survival, differentiation, growth, and development of neurons in the central nervous system. The human BDNF gene is located on chromosome 11 in the p13-14 region and covers approximately 70 kb. The gene has a complex structure as it consists of 11 exons (I-IX, plus Vh and VIIIh) and nine functional promoters. BDNF expression in the brain is relatively low but it is found in most major regions of the brain.
Material and methods: The gene encoding the brain-derived neurotrophic factor BDNF has many polymorphisms, but one of them mainly attracts the attention of researchers. This is a common, non-conservative polymorphism - rs6265 - a single nucleotide SNP polymorphism that results in an amino acid change – valine (Val) to methionine (Met) - at codon 66.
Results: Polymorphism rs6265 is associated with many neuropsychiatric disorders, including depression or a higher risk of addiction, but it also determines other features, such as e.g. sports performance. Few studies are investigating the relationship between rs6265 polymorphism and predisposition to play sports.
Conclusions: The results on the effect of rs6265 BDNF polymorphic variants on the risk of depression and addition are inconsistent, indicating a significant association in some studies and none in others. Therefore, more studies are needed to determine how rs6265 affects gene expression and function.
Collapse
|
4
|
Huang Z, Wu D, Qu X, Li M, Zou J, Tan S. BDNF and nicotine dependence: associations and potential mechanisms. Rev Neurosci 2020; 32:/j/revneuro.ahead-of-print/revneuro-2020-0044/revneuro-2020-0044.xml. [PMID: 32887210 DOI: 10.1515/revneuro-2020-0044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 07/18/2020] [Indexed: 12/30/2022]
Abstract
Smoking is the leading preventable cause of death worldwide and tobacco addiction has become a serious public health problem. Nicotine is the main addictive component of tobacco, and the majority of people that smoke regularly develop nicotine dependence. Nicotine addiction is deemed to be a chronic mental disorder. Although it is well known that nicotine binds to the nicotinic acetylcholine receptors (nAChRs) and activates the mesolimbic dopaminergic system (MDS) to generate the pleasant and rewarding effects, the molecular mechanisms of nicotine addiction are not fully understood. Brain-derived neurotrophic factor (BDNF) is the most prevalent growth factor in the brain, which regulates neuron survival, differentiation, and synaptic plasticity, mainly through binding to the high affinity receptor tyrosine kinase receptor B (TrkB). BDNF gene polymorphisms are associated with nicotine dependence and blood BDNF levels are altered in smokers. In this review, we discussed the effects of nicotine on BDNF expression in the brain and summarized the underlying signaling pathways, which further indicated BDNF as a key regulator in nicotine dependence. Further studies that aim to understand the neurobiological mechanism of BDNF in nicotine addcition would provide a valuable reference for quitting smoking and developing the treatment of other addictive substances.
Collapse
Affiliation(s)
- Zeyi Huang
- Department of Histology and Embryology, Institute of Clinical Anatomy & Reproductive Medicine, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical College, University of South China, 28 W. Changsheng Road, Hengyang421001,Hunan, China
| | - Daichao Wu
- Department of Histology and Embryology, Institute of Clinical Anatomy & Reproductive Medicine, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical College, University of South China, 28 W. Changsheng Road, Hengyang421001,Hunan, China
| | - Xilin Qu
- Grade 2017 of Clinical Medicine, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical College, University of South China, Hengyang421001,Hunan, China
| | - Meixiang Li
- Department of Histology and Embryology, Institute of Clinical Anatomy & Reproductive Medicine, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical College, University of South China, 28 W. Changsheng Road, Hengyang421001,Hunan, China
| | - Ju Zou
- Department of Parasitology, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical College, University of South China, Hengyang421001,Hunan, China
| | - Sijie Tan
- Department of Histology and Embryology, Institute of Clinical Anatomy & Reproductive Medicine, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang Medical College, University of South China, 28 W. Changsheng Road, Hengyang421001,Hunan, China
| |
Collapse
|
5
|
Meta-analytic method reveal a significant association of theBDNF Val66Met variant with smoking persistence based on a large samples. THE PHARMACOGENOMICS JOURNAL 2019; 20:398-407. [PMID: 31787753 PMCID: PMC7253357 DOI: 10.1038/s41397-019-0124-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 09/10/2019] [Accepted: 11/17/2019] [Indexed: 12/20/2022]
Abstract
Although numerous genetic studies have reported the link between
Val66Met in BDNF gene with smoking, the findings
remain controversial, mainly due to small-to-moderate sample sizes. The main aim of
current investigation is to explore whether the variant of Val66Met has any genetic
functions in the progress of smoking persistence. The Val-based dominant genetic
model considering Val/* (namely, Val/Val + Val/Met) and Met/Met as two genotypes
with comparison of the frequency of each genotype in current smokers and never
smokers. There were seven genetic association articles including eight independent
datasets with 10,160 participants were chosen in current meta-analytic
investigation. In light of the potent effects of ethnicity on homogeneity across
studies, we carried out separated meta-analyses according to the ancestry origin by
using the wide-used tool of Comprehensive Meta-analysis software (V 2.0). Our
meta-analyses results indicated that the Val66Met polymorphism was significantly
linked with smoking persistence based on either all the chosen samples (N = 10,160; Random and fixed models: pooled OR = 1.23;
95% CI = 1.03–1.46; P value = 0.012) or Asian
samples (N = 2,095; Fixed model: pooled
OR = 1.25; 95% CI = 1.01–1.54; P value = 0.044;
Random model: pooled OR = 1.25; 95% CI = 1.001–1.56; P value = 0.049). No significant clue of bias in publications or
heterogeneity across studies was detected. Thus, we conclude that the Val66Met
(rs6265) variant conveys genetic susceptibility to maintaining smoking, and smokers
who carry Val/* genotypes have a higher possibility of maintaining smoking than
those having Met/Met genotype.
Collapse
|
6
|
Ohmoto M, Takahashi T. Effect of genetic polymorphism of brain-derived neurotrophic factor and serotonin transporter on smoking phenotypes: A pilot study of Japanese participants. Heliyon 2019; 5:e01234. [PMID: 30815604 PMCID: PMC6378332 DOI: 10.1016/j.heliyon.2019.e01234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 01/09/2019] [Accepted: 02/11/2019] [Indexed: 11/25/2022] Open
Abstract
PURPOSE This study investigated whether a gene polymorphism causing a Val66Met substitution (rs6265) in brain-derived neurotrophic factor (BDNF) is associated with smoking initiation, smoking cessation, nicotine dependence and age of smoking initiation, in Japanese participants. Additionally, this study examined whether the S allele of the serotonin transporter gene-linked polymorphic region (5-HTTLPR) is associated with the BDNF Val66Met polymorphism on smoking phenotypes. PATIENTS AND METHODS The genotypic proportion of the polymorphism responsible for BDNF Val66Met was determined in 148 participants including 88 current smokers, 21 former smokers, and 39 never smokers, and Fisher's exact test was used to investigate the relationship between this polymorphism and smoking cessation and initiation as well as the association between the genotypes of current smokers with a heavy smoking index (HSI) and the age of smoking initiation. In addition to the BDNF Val66Met polymorphism, the 5-HTTLPR polymorphism has also been evaluated in a specific subset of participants. RESULTS We found statistically significant correlations between the BDNF Val66Met polymorphism and the HSI, both in the whole study sample (P = 0.017) and in the male subgroup (P = 0.049). Moreover, the 5-HTTLPR polymorphism was associated with the age of smoking initiation in current smokers carrying the BDNF Met allele, in both the whole study sample (P = 0.041) and the male subgroup (P = 0.041). On the other hand, no association was observed between the BDNF Val66Met polymorphism, either alone or in combination with the 5-HTTLPR polymorphism, and the age of smoking cessation. Finally, no independent effects of the BDNF Val66Met genotype on the age of smoking initiation were detected. CONCLUSION This pilot study provides preliminary findings regarding the influence of BDNF Val66Met on smoking phenotypes and the interacting effect of 5-HTTLPR on the association between BDNF Val66Met and smoking phenotypes in Japanese participants.
Collapse
Affiliation(s)
- Masanori Ohmoto
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3 Kanagawa-machi, Kanazawa 920-1181, Japan
| | | |
Collapse
|
7
|
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
| |
Collapse
|
8
|
Machaalani R, Chen H. Brain derived neurotrophic factor (BDNF), its tyrosine kinase receptor B (TrkB) and nicotine. Neurotoxicology 2018; 65:186-195. [DOI: 10.1016/j.neuro.2018.02.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/21/2018] [Accepted: 02/25/2018] [Indexed: 02/07/2023]
|
9
|
Lang BM, Biedermann L, van Haaften WT, de Vallière C, Schuurmans M, Begré S, Zeitz J, Scharl M, Turina M, Greuter T, Schreiner P, Heinrich H, Kuntzen T, Vavricka SR, Rogler G, Beerenwinkel N, Misselwitz B. Genetic polymorphisms associated with smoking behaviour predict the risk of surgery in patients with Crohn's disease. Aliment Pharmacol Ther 2018; 47:55-66. [PMID: 29052254 DOI: 10.1111/apt.14378] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 08/04/2017] [Accepted: 09/22/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Smoking is a strong environmental factor leading to adverse outcomes in Crohn's disease, but a more benign course in ulcerative colitis. Several single nucleotide polymorphisms (SNPs) are associated with smoking quantity and behaviour. AIM To assess whether smoking-associated SNPs interact with smoking to influence the clinical course of inflammatory bowel diseases. METHODS Genetic and prospectively obtained clinical data from 1434 Swiss inflammatory bowel disease cohort patients (821 Crohn's disease and 613 ulcerative colitis) were analysed. Six SNPs associated with smoking quantity and behaviour (rs588765, rs1051730, rs1329650, rs4105144, rs6474412 and rs3733829) were combined to form a risk score (range: 0-12) by adding the number of risk alleles. We calculated multivariate models for smoking, risk of surgery, fistula, Crohn's disease location and ulcerative colitis disease extent. RESULTS In Crohn's disease patients who smoke, the number of surgeries was associated with the genetic risk score. This translates to a predicted 3.5-fold (95% confidence interval: 2.4- to 5.7-fold, P<.0001) higher number of surgical procedures in smokers with 12 risk alleles than individuals with the lowest risk. Patients with a risk score >7 had a significantly shorter time to first intestinal surgery. The genetic risk score did not predict surgery in ulcerative colitis or occurrence of fistulae in Crohn's disease. SNP rs6265 was associated with ileal disease in Crohn's disease (P<.05) and proctitis in ulcerative colitis (P<.05). CONCLUSIONS SNPs associated with smoking quantity is associated with an increased risk for surgery in Crohn's disease patients who smoke. Our data provide an example of genetics interacting with the environment to influence the disease course of inflammatory bowel disease.
Collapse
Affiliation(s)
- B M Lang
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland.,Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - L Biedermann
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - W T van Haaften
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland.,Department of Gastroenterology and Hepatology, University Medical Center Groningen, Groningen, The Netherlands
| | - C de Vallière
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - M Schuurmans
- Division of Pneumology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - S Begré
- Hohenegg Hospital, Meilen, Switzerland
| | - J Zeitz
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - M Scharl
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - M Turina
- Division of Visceral Surgery, University Hospital Zurich (USZ), Zurich, Switzerland
| | - T Greuter
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - P Schreiner
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - H Heinrich
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - T Kuntzen
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - S R Vavricka
- Division of Gastroenterology, Triemli Hospital Zurich, Zürich, Switzerland
| | - G Rogler
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | - N Beerenwinkel
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland.,Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - B Misselwitz
- Division of Gastroenterology, University Hospital Zurich (USZ) and Zurich University, Zurich, Switzerland
| | | |
Collapse
|
10
|
Converging findings from linkage and association analyses on susceptibility genes for smoking and other addictions. Mol Psychiatry 2016; 21:992-1008. [PMID: 27166759 PMCID: PMC4956568 DOI: 10.1038/mp.2016.67] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 03/05/2016] [Accepted: 03/09/2016] [Indexed: 12/18/2022]
Abstract
Experimental approaches to genetic studies of complex traits evolve with technological advances. How do discoveries using different approaches advance our knowledge of the genetic architecture underlying complex diseases/traits? Do most of the findings of newer techniques, such as genome-wide association study (GWAS), provide more information than older ones, for example, genome-wide linkage study? In this review, we address these issues by developing a nicotine dependence (ND) genetic susceptibility map based on the results obtained by the approaches commonly used in recent years, namely, genome-wide linkage, candidate gene association, GWAS and targeted sequencing. Converging and diverging results from these empirical approaches have elucidated a preliminary genetic architecture of this intractable psychiatric disorder and yielded new hypotheses on ND etiology. The insights we obtained by putting together results from diverse approaches can be applied to other complex diseases/traits. In sum, developing a genetic susceptibility map and keeping it updated are effective ways to keep track of what we know about a disease/trait and what the next steps may be with new approaches.
Collapse
|
11
|
Jamal M, Van der Does W, Penninx BWJH. Effect of variation in BDNF Val(66)Met polymorphism, smoking, and nicotine dependence on symptom severity of depressive and anxiety disorders. Drug Alcohol Depend 2015; 148:150-7. [PMID: 25618300 DOI: 10.1016/j.drugalcdep.2014.12.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 12/12/2014] [Accepted: 12/27/2014] [Indexed: 01/05/2023]
Abstract
BACKGROUND Smoking, especially nicotine dependence is associated with more severe symptoms of depression and anxiety disorders. However, the mechanisms underlying this association are unclear. We investigated the effect of brain-derived neurotrophic factor (BDNF) Val(66)Met polymorphism on the severity of depressive and anxiety symptoms in never-smokers, former smokers, non-dependent, and nicotine-dependent smokers with a current diagnosis of depression and/or anxiety. METHODS Patients with depressive or anxiety disorders and with available BDNF Val(66)Met polymorphism data (N=1271) were selected from Netherlands Study of Depression and Anxiety (NESDA). Dependent variables were severity of symptoms. Independent variables were smoking status and BDNF genotype. Age, sex, education, recent negative life events, alcohol use, body mass index, and physical activity were treated as covariates. RESULTS After controlling for covariates, nicotine-dependent smokers had more severe depressive symptoms than non-dependent smokers, former and never-smokers. The latter three groups did not differ in severity of depression. In Val(66)Val carriers, nicotine-dependent smokers had more severe symptoms of depression and anxiety than the other three groups, which were comparable in symptom severity. In Met(66) carriers, there were no group differences on severity of depression and anxiety. Nicotine dependence was the strongest predictor of severity of symptoms only in Val(66)Val carriers. CONCLUSIONS In patients with a current diagnosis of depression or anxiety, the relationship between nicotine dependence and symptom severity may be moderated by BDNF Val(66)Met. These results suggest that inherent genetic differences may be crucial for the worse behavioral outcome of nicotine, and that Val(66)Val carriers may benefit most in mental health from smoking cessation.
Collapse
Affiliation(s)
- Mumtaz Jamal
- Institute of Psychology, Leiden University, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands.
| | - Willem Van der Does
- Institute of Psychology, Leiden University, Wassenaarseweg 52, 2333 AK Leiden, The Netherlands; Department of Psychiatry, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Brenda W J H Penninx
- Department of Psychiatry, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; Department of Psychiatry, VU University Medical Center, AJ Ernststraat 887, 1081 HL Amsterdam, The Netherlands; Department of Psychiatry, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| |
Collapse
|
12
|
Morrow JD, Saunders BT, Maren S, Robinson TE. Sign-tracking to an appetitive cue predicts incubation of conditioned fear in rats. Behav Brain Res 2015; 276:59-66. [PMID: 24747659 PMCID: PMC4201891 DOI: 10.1016/j.bbr.2014.04.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 03/29/2014] [Accepted: 04/01/2014] [Indexed: 12/29/2022]
Abstract
Although post-traumatic stress disorder (PTSD) and addiction are very different disorders, both are characterized by hyperreactivity to trauma- or drug-related cues, respectively. We investigated whether an appetitive conditioning task, Pavlovian conditioned approach, which predicts vulnerability to reinstatement of cocaine-seeking, also predicts fear incubation, which may be a marker for vulnerability to PTSD. We classified rats based on whether they learned to approach and interact with a food predictive cue (sign-trackers), or, whether upon cue presentation they went to the location of impending food delivery (goal-trackers). Rats were then exposed to extensive Pavlovian tone-shock pairings, which causes the fear response to increase or "incubate" over time. We found that the fear incubation effect was only present in sign-trackers. The behavior of goal-trackers was more consistent with a normal fear response-it was most robust immediately after training and decayed slowly over time. Sign-trackers also had lower levels of brain-derived neurotrophic factor (BDNF) protein in the prefrontal cortex than goal-trackers. These results indicate that, while many factors likely contribute to the disproportionate co-occurrence of PTSD and substance abuse, one such factor may be a core psychological trait that biases some individuals to attribute excessive motivational significance to predictive cues, regardless of the emotional valence of those cues. High levels of BDNF in the prefrontal cortex may be protective against developing excessive emotional and motivational responses to salient cues.
Collapse
Affiliation(s)
- Jonathan D Morrow
- Department of Psychiatry, University of Michigan, 4250 Plymouth Road SPC 5767, Ann Arbor, MI 48109-2700, United States; Neuroscience Graduate Program, University of Michigan, 4137 Undergraduate Science Building (USB), 204 Washtenaw Avenue, Ann Arbor, MI 48109-2215, United States.
| | - Benjamin T Saunders
- Department of Psychology, Biopsychology Program, University of Michigan, East Hall, 530 Church Street, Ann Arbor, MI 48109-1043, United States.
| | - Stephen Maren
- Neuroscience Graduate Program, University of Michigan, 4137 Undergraduate Science Building (USB), 204 Washtenaw Avenue, Ann Arbor, MI 48109-2215, United States; Department of Psychology, Biopsychology Program, University of Michigan, East Hall, 530 Church Street, Ann Arbor, MI 48109-1043, United States.
| | - Terry E Robinson
- Neuroscience Graduate Program, University of Michigan, 4137 Undergraduate Science Building (USB), 204 Washtenaw Avenue, Ann Arbor, MI 48109-2215, United States; Department of Psychology, Biopsychology Program, University of Michigan, East Hall, 530 Church Street, Ann Arbor, MI 48109-1043, United States.
| |
Collapse
|
13
|
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.
Collapse
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.
| |
Collapse
|
14
|
Haerian BS. BDNF rs6265 polymorphism and drug addiction: a systematic review and meta-analysis. Pharmacogenomics 2013; 14:2055-65. [DOI: 10.2217/pgs.13.217] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A majority of studies have shown a link between the common functional rs6265 polymorphism of the BDNF gene and susceptibility to drug dependence. However, the pattern of results is inconsistent. To precisely evaluate this association, a systematic review and meta-analysis of previous case–control reports was conducted. Data from 20 studies containing 9419 participants (4665 cases and 4754 controls) conducted between 2004 and 2013 restricted to alcohol, nicotine, heroin, substance and methamphetamine dependency were meta-analyzed. Following quality control of the results, a significant association between C allele and methamphetamine dependence remained in south Asian subjects (p = 0.004). Similar results were detected in south Asian subjects for methamphetamine dependence and in Chinese subjects for heroin dependence under an autosomal codominant genotype model (TT vs CC, p = 0.005 and p = 0.0004, respectively). In conclusion, the rs6265 polymorphism may be a risk factor for methamphetamine dependence in south Asian subjects or for heroin dependence in Chinese subjects.
Collapse
Affiliation(s)
- Batoul Sadat Haerian
- Department of Pharmacology & Medicine, University of Malaya, Kuala Lumpur, Malaysia
| |
Collapse
|
15
|
Uhl GR, Drgonova J, Hall FS. Curious cases: Altered dose-response relationships in addiction genetics. Pharmacol Ther 2013; 141:335-46. [PMID: 24189489 DOI: 10.1016/j.pharmthera.2013.10.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 10/24/2013] [Indexed: 01/10/2023]
Abstract
Dose-response relationships for most addictive substances are "inverted U"-shaped. Addictive substances produce both positive features that include reward, euphoria, anxiolysis, withdrawal-relief, and negative features that include aversion, dysphoria, anxiety and withdrawal symptoms. A simple model differentially associates ascending and descending limbs of dose-response curves with rewarding and aversive influences, respectively. However, Diagnostic and Statistical Manual (DSM) diagnoses of substance dependence fail to incorporate dose-response criteria and don't directly consider balances between euphoric and dysphoric drug effects. Classical genetic studies document substantial heritable influences on DSM substance dependence. Linkage and genome-wide association studies identify modest-sized effects at any locus. Nevertheless, clusters of SNPs within selected genes display 10(-2)>p>10(-8) associations with dependence in many independent samples. For several of these genes, evidence for cis-regulatory, level-of-expression differences supports the validity of mouse models in which levels of expression are also altered. This review documents surprising, recently defined cases in which convergent evidence from humans and mouse models supports central influences of altered dose-response relationships in mediating the impact of relevant genomic variation on addiction phenotypes. For variation at loci for the α5 nicotinic acetylcholine receptor, cadherin 13, receptor type protein tyrosine phosphatase Δ and neuronal cell adhesion molecule genes, changed dose-response relationships conferred by gene knockouts in mice are accompanied by supporting human data. These observations emphasize desirability of carefully elucidating dose-response relationships for both rewarding and aversive features of abused substances wherever possible. They motivate consideration of individual differences in dose-response relationships in addiction nosology and therapeutics.
Collapse
Affiliation(s)
- George R Uhl
- Molecular Neurobiology Branch, National Institute on Drug Abuse, Intramural Research Program, Baltimore, MD 21224, United States.
| | - Jana Drgonova
- Molecular Neurobiology Branch, National Institute on Drug Abuse, Intramural Research Program, Baltimore, MD 21224, United States
| | - F Scott Hall
- Molecular Neurobiology Branch, National Institute on Drug Abuse, Intramural Research Program, Baltimore, MD 21224, United States
| |
Collapse
|