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Olasore HS, Oyedeji TA, Faleti JO, Ogundele OI, Olashore AA. Association between dopamine receptor D2 Taq IA gene polymorphism (rs1800497) and personality traits. SAGE Open Med 2024; 12:20503121241241922. [PMID: 38751571 PMCID: PMC11095179 DOI: 10.1177/20503121241241922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 03/08/2024] [Indexed: 05/18/2024] Open
Abstract
Objective This study aimed to find a potential association between the DRD2 Taq1A gene polymorphism (rs1800497 C32806T) and personality traits. Methods In all, 249 youths were recruited for this study. The Short-form Revised Eysenck Personality Questionnaire was administered to assess personality traits. The participants were genotyped for the DRD2 Taq1A polymorphism using the polymerase chain reaction-restriction fragment length polymorphism method. Statistical analysis was carried out to find a possible association between the genotypes and aspects of personality traits assessed. Results The frequencies of the A1 and A2 alleles in our sampled population were 215 (43.2%) and 283 (56.8%), while the frequencies of A1A1, A1A2, and A2A2 were 67 (26.9%), 81 (32.5%), and 101 (40.6%), respectively. The study population was not in Hardy-Weinberg equilibrium (χ2 = 17.64, p < 0.001). The A2 allele was significantly associated with extraversion. Although this allele was also associated with neuroticism, psychoticism, and lie, the association was not significant. Conclusion The A2 allele of the DRD2 Taq1A polymorphism was found to be more associated with extraversion, as measured by the Short-form Revised Eysenck Personality Questionnaire.
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Affiliation(s)
- Holiness S.A Olasore
- Faculty of Basic Medical Sciences, Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | - Tolulope A. Oyedeji
- Faculty of Basic Medical Sciences, Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | - Joseph O. Faleti
- Faculty of Basic Medical Sciences, Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | - Omobola I. Ogundele
- Faculty of Basic Medical Sciences, Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | - Anthony A. Olashore
- Faculty of Medicine, Department of Psychiatry, University of Botswana, Gaborone, Botswana
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Qin Y, Sun Q, Wang L, Hu F, Zhang Q, Wang W, Li W, Wang Y. DRD2 TaqIA polymorphism-related functional connectivity between anterior insula and dorsolateral prefrontal cortex predicts the retention time in heroin-dependent individuals under methadone maintenance treatment. Eur Arch Psychiatry Clin Neurosci 2024; 274:433-443. [PMID: 37400684 DOI: 10.1007/s00406-023-01626-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 05/22/2023] [Indexed: 07/05/2023]
Abstract
BACKGROUND Dopamine receptor D2 (DRD2) TaqIA polymorphism has an influence on addiction treatment response and prognosis by mediating brain dopaminergic system efficacy. Insula is crucial for conscious urges to take drugs and maintain drug use. However, it remains unclear about the contribution of DRD2 TaqIA polymorphism to the regulation of insular on addiction behavioral and its relation with the therapeutic effect of methadone maintenance treatment (MMT). METHODS 57 male former heroin dependents receiving stable MMT and 49 matched male healthy controls (HC) were enrolled. Salivary genotyping for DRD2 TaqA1 and A2 alleles, brain resting-state functional MRI scan and a 24-month follow-up for collecting illegal-drug-use information was conducted and followed by clustering of functional connectivity (FC) patterns of HC insula, insula subregion parcellation of MMT patients, comparing the whole brain FC maps between the A1 carriers and non-carriers and analyzing the correlation between the genotype-related FC of insula sub-regions with the retention time in MMT patients by Cox regression. RESULTS Two insula subregions were identified: the anterior insula (AI) and the posterior insula (PI) subregion. The A1 carriers had a reduced FC between the left AI and the right dorsolateral prefrontal cortex (dlPFC) relative to no carriers. And this reduced FC was a poor prognostic factor for the retention time in MMT patients. CONCLUSION DRD2 TaqIA polymorphism affects the retention time in heroin-dependent individuals under MMT by mediating the functional connectivity strength between left AI and right dlPFC, and the two brain regions are promising therapeutic targets for individualized treatment.
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Affiliation(s)
- Yue Qin
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China
- Department of Radiology, Xi'an Daxing Hospital, Xi'an, People's Republic of China
| | - Qinli Sun
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China
| | - Lei Wang
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China
- Department of Radiology, Xi'an Daxing Hospital, Xi'an, People's Republic of China
| | - Feng Hu
- Department of Radiology, Hospital of Shaannxi Provincial Geology and Mineral Resources Bureau, Xi'an, People's Republic of China
| | - Qiuli Zhang
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China
| | - Wei Wang
- Department of Radiology, Tangdu Hospital, The Fourth Military Medical University, 569 Xinsi Road, Baqiao District, Xi'an, 710038, People's Republic of China
| | - Wei Li
- Department of Radiology, Tangdu Hospital, The Fourth Military Medical University, 569 Xinsi Road, Baqiao District, Xi'an, 710038, People's Republic of China.
| | - Yarong Wang
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, People's Republic of China.
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Olasore HSA, Osuntoki AA, Magbagbeola OA, Awesu ARB, Olashore AA. Association of Dopamine Transporter Gene (DAT1) 40 bp 3′ UTR VNTR Polymorphism (rs28363170) and Cannabis Use Disorder. SUBSTANCE ABUSE: RESEARCH AND TREATMENT 2023; 17:11782218231163696. [PMID: 37020726 PMCID: PMC10068503 DOI: 10.1177/11782218231163696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 02/27/2023] [Indexed: 04/03/2023]
Abstract
Introduction: Cannabis remains the most widely used illicit drug among Nigerians, often associated with psychiatric disorders. Since genetic predisposition has been implicated in substance use disorders, we, therefore, aimed at finding out the relationship between dopamine transporter gene (DAT1) polymorphism and cannabis use disorder. Methods: We recruited 104 patients from a tertiary psychiatric facility in Lagos, Nigeria, who were diagnosed with cannabis use disorder according to ICD-10 and 96 non-smokers as a comparative group. The smokers were screened with Cannabis Use Disorder Identification Test (CUDIT), and cannabis dependence was assessed with the Severity of Dependence Scale (SDS). Genotyping was carried out for the 40 bp 3′ UTR VNTR of the DAT1 (rs28363170). Results: The frequencies of 9R/9R, 9R/10R, 10R/10R among non-smokers and smokers were 14 (14.3%), 25 (26.2%), 57 (59.5%) and 17 (16.3%), 54 (51.9%), 33 (31.7%) respectively. The genotype distribution was in Hardy Weinberg equilibrium (HWE) only in the smokers’ population (χ² = 1.896, P = .166). Individuals with the 10R allele were almost twice as likely as the 9R carriers to smoke cannabis (OR = 1.915, 95% CI: 1.225-2.995). However, this polymorphism was not associated with the quantity of cannabis smoked, age at onset of smoking, CUDIT, and SDS scores. Conclusion: The DAT VNTR polymorphism was associated with cannabis smoking but not cannabis use disorder.
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Affiliation(s)
- Holiness SA Olasore
- Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | - Akinniyi A Osuntoki
- Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | - Olubunmi A Magbagbeola
- Department of Biochemistry, College of Medicine of the University of Lagos, Idi Araba, Lagos, Nigeria
| | | | - Anthony A Olashore
- Department of Psychiatry, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
- Department of Psychiatry, University of Botswana, Gaborone, Botswana
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Dennen CA, Blum K, Bowirrat A, Khalsa J, Thanos PK, Baron D, Badgaiyan RD, Gupta A, Braverman ER, Gold MS. Neurogenetic and Epigenetic Aspects of Cannabinoids. EPIGENOMES 2022; 6:27. [PMID: 36135314 PMCID: PMC9498086 DOI: 10.3390/epigenomes6030027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 08/17/2022] [Accepted: 08/23/2022] [Indexed: 12/04/2022] Open
Abstract
Cannabis is one of the most commonly used and abused illicit drugs in the world today. The United States (US) currently has the highest annual prevalence rate of cannabis consumption in the world, 17.9% in individuals aged 12 or older, and it is on the rise. With increasing cannabis use comes the potential for an increase in abuse, and according to the Substance Abuse and Mental Health Services Administration (SAMHSA), approximately 5.1% of Americans had Cannabis Use Disorder (CUD) in 2020. Research has shown that genetics and epigenetics play a significant role in cannabis use and CUD. In fact, approximately 50-70% of liability to CUD and 40-48% of cannabis use initiation have been found to be the result of genetic factors. Cannabis usage and CUD have also been linked to an increased risk of psychiatric disorders and Reward Deficiency Syndrome (RDS) subsets like schizophrenia, depression, anxiety, and substance use disorder. Comprehension of the genetic and epigenetic aspects of cannabinoids is necessary for future research, treatment plans, and the production of pure cannabinoid compounds, which will be essential for FDA approval. In conclusion, having a better understanding of the epigenetic and genetic underpinnings of cannabis use, CUD, and the endocannabinoid system as a whole will aid in the development of effective FDA-approved treatment therapies and the advancement of personalized medicine.
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Affiliation(s)
- Catherine A. Dennen
- Department of Family Medicine, Jefferson Health Northeast, Philadelphia, PA 19114, USA
| | - Kenneth Blum
- Division of Nutrigenomics, The Kenneth Blum Behavioral Neurogenetic Institute, Austin, TX 78701, USA
- Division of Addiction Research & Education, Center for Psychiatry, Medicine & Primary Care (Office of the Provost), Graduate College, Western University of Health Sciences, Pomona, CA 91766, USA
- Institute of Psychology, ELTE Eötvös Loránd University, 1075 Budapest, Hungary
- Department of Psychiatry, University of Vermont, Burlington, VT 05405, USA
- Department of Psychiatry, Wright University Boonshoft School of Medicine, Dayton, OH 45324, USA
| | - Abdalla Bowirrat
- Department of Molecular Biology, Adelson School of Medicine, Ariel University, Ariel 40700, Israel
| | - Jag Khalsa
- Department of Microbiology, Immunology and Tropical Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, DC 20037, USA
- Medical Consequences of Drug Abuse and Infections Branch, National Institute on Drug Abuse, National Institutes of Health, Bethesda, MD 20852, USA
| | - Panayotis K. Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biosciences, State University of New York at Buffalo, Buffalo, NY 14260, USA
| | - David Baron
- Division of Addiction Research & Education, Center for Psychiatry, Medicine & Primary Care (Office of the Provost), Graduate College, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Rajendra D. Badgaiyan
- Department of Psychiatry, Icahn School of Medicine Mt Sinai, New York, NY 10029, USA
- Department of Psychiatry, South Texas Veteran Health Care System, Audie L. Murphy Memorial VA Hospital, San Antonio, TX 78229, USA
- Long School of Medicine, University of Texas Medical Center, San Antonio, TX 78229, USA
| | - Ashim Gupta
- Future Biologics, Lawrenceville, GA 30043, USA
| | - Eric R. Braverman
- Division of Nutrigenomics, The Kenneth Blum Behavioral Neurogenetic Institute, Austin, TX 78701, USA
| | - Mark S. Gold
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA
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