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The role of the Cys23Ser (rs6318) polymorphism of the HTR2C gene in suicidal behavior. Psychiatr Genet 2017; 27:199-209. [DOI: 10.1097/ypg.0000000000000184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Balestri M, Calati R, Serretti A, Hartmann AM, Konte B, Friedl M, Giegling I, Rujescu D. Maoa and Maob polymorphisms and personality traits in suicide attempters and healthy controls: a preliminary study. Psychiatry Res 2017; 249:212-217. [PMID: 28119174 DOI: 10.1016/j.psychres.2017.01.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 11/16/2016] [Accepted: 01/08/2017] [Indexed: 12/15/2022]
Abstract
Serotonergic neurotransmission dysfunctions have been well documented in patients with suicidal behaviour. We investigated monoamine oxidase A (MAOA: rs2064070, rs6323, rs909525) and B (MAOB: rs1799836, rs2311013, rs2205655) genetic modulation of personality traits (Temperament and Character Inventory, TCI) as endophenotype for suicidal behaviour. 108 suicide attempters and 286 healthy controls of German origin were screened. Among females, allelic analyses revealed associations between MAOA rs6323 A allele and higher Harm Avoidance in suicide attempters and MAOB rs2205655 A allele and higher Cooperativeness scores in healthy controls. Among males, MAOA rs909525 A allele was associated with higher Reward Dependence in suicide attempters. Multivariate analyses controlling for age and educational level mainly confirmed results. Case-control analyses in this subsample do not differ from our previously reported one. Despite of the small sample size, a possible involvement of these genes in the modulation of personality traits closely related to suicidal behaviour cannot be excluded.
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Affiliation(s)
- Martina Balestri
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Bologna, Italy
| | - Raffaella Calati
- INSERM U1061, University of Montpellier UM1, FondaMental Foundation, Montpellier, France
| | - Alessandro Serretti
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, Bologna, Italy.
| | | | - Bettina Konte
- Department of Psychiatry, University of Halle, Halle, Germany
| | - Marion Friedl
- Department of Psychiatry, University of Halle, Halle, Germany
| | - Ina Giegling
- Department of Psychiatry, University of Halle, Halle, Germany
| | - Dan Rujescu
- Department of Psychiatry, University of Halle, Halle, Germany
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Molina-Guzman G, González-Castro TB, Hernández Díaz Y, Tovilla-Zárate CA, Juárez-Rojop IE, Guzmán-Priego CG, Genis A, Pool García S, López-Narvaez ML, Rodriguez-Perez JM. Gender differences in the association between HTR2C gene variants and suicidal behavior in a Mexican population: a case-control study. Neuropsychiatr Dis Treat 2017; 13:559-566. [PMID: 28260903 PMCID: PMC5328611 DOI: 10.2147/ndt.s122024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND The aim of this case-control study was to explore the association by gender between the HTR2C gene variants and suicidal behavior in a Mexican population. SUBJECTS AND METHODS A total of 183 suicide attempters and 208 healthy volunteers were included in this study. We genotyped five polymorphisms of HTR2C (rs547536, rs2192372, rs4272555, rs6318, and rs2428707), then measured the association by genotype, allele, and haplotype. RESULTS In the female group, we found an association between two polymorphisms of the HTR2C (rs4272555 and rs2428707) and suicide attempts. The C allele of the single-nucleotide polymorphism (SNP) rs4272555 was associated with a decreased risk of suicide attempt (P=0.01, odds ratio =0.26, 95% confidence interval: 0.09-0.79), whereas the G allele of the SNP rs2428707 was associated with an increased risk of suicide attempt (P=0.01, odds ratio =3.68, 95% confidence interval: 1.24-10.90). No significant association was observed between the other polymorphisms studied (rs547536, rs2192372, rs6318) or haplotypes with suicide attempts. CONCLUSION These findings suggest a possible risk factor of the HTR2C gene in the pathology of suicidal behavior in Mexican population. More studies are necessary to confirm this association.
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Affiliation(s)
- Gabriel Molina-Guzman
- División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa
| | | | - Yazmín Hernández Díaz
- División Académica Multidisciplinaria de Jalpa de Méndez, Universidad Juárez Autónoma de Tabasco, Jalpa de Méndez
| | - Carlos Alfonso Tovilla-Zárate
- División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Comalcalco, Tabasco, México
| | - Isela E Juárez-Rojop
- División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Comalcalco, Tabasco, México
| | | | - Alma Genis
- Instituto Nacional de Medicina Genómica (INMEGEN), Servicios de Atención Psiquiátrica (SAP), Secretaría de Salud, Ciudad de México, México
| | | | | | - José Manuel Rodriguez-Perez
- Departamento de Biología Molecular, Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, México
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Mohammadi S, Khazaie H, Rahimi Z, Vaisi-Raygani A, Zargooshi N, Rahimi Z. The serotonin transporter (5-HTTLPR) but not serotonin receptor (5-HT2C Cys23Ser) variant is associated with bipolar I disorder in Kurdish population from Western Iran. Neurosci Lett 2015; 590:91-5. [PMID: 25596490 DOI: 10.1016/j.neulet.2015.01.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 12/27/2014] [Accepted: 01/09/2015] [Indexed: 11/28/2022]
Abstract
The role of 5-HTTLPR and 5-HT2C Cys23Ser polymorphisms in the psychopathology of mood disorders and suicide behavior is controversial. The aim of present study was to investigate the association between 5-HTTLPR and 5-HT2C Cys23Ser variants and susceptibility to bipolar I disorder (BID). The 5-HT2C genotypes were studied in 152 patients with BID and 173 gender- and age-matched healthy individuals with Kurds ethnic background from Western Iran using PCR and PCR-RFLP methods. In recessive model (SS vs. LL+LS) the SS genotype was associated with 1.79-fold increased risk of BID (p=0.018). Also, the presence of S allele increased the risk of adult-onset BID by 1.76-fold (p=0.027). No association was detected between 5-HTTLPR genotypes and alleles with suicide attempt. The frequency of 5-HT2C Ser allele in patients and controls were 12.3 and 12.5%, respectively. Mutant allele of HT2C Ser had higher frequency in female (14.7%) than male (10.5%, p=0.27) patients. The frequency of HT2C Ser allele in patients with a family history of BID tended to be higher (15.7%) than those without a family history of the disease (11.8%). The frequency of HT2C Ser allele in suicide attempter women was higher (16.7%) than those without a suicide attempt (14.3%). Our findings demonstrate 5-HTTLPR polymorphism might be a risk factor for BID and adult-onset BID in Kurds population. However, we found the lack of an association between 5-HT2C Cys/Ser variants and the risk of BID.
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Affiliation(s)
- Sahar Mohammadi
- Department of Clinical Biochemistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Habibolah Khazaie
- Department of Psychiatry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ziba Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Asad Vaisi-Raygani
- Department of Clinical Biochemistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Newsha Zargooshi
- Department of Biotechnology, University of Kurdistan, Sanandaj, Iran
| | - Zohreh Rahimi
- Department of Clinical Biochemistry, Kermanshah University of Medical Sciences, Kermanshah, Iran; Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Thelma Beatriz GC, Isela JR, Alma G, María Lilia LN, Carlos Alfonso TZ. Association between HTR2C gene variants and suicidal behaviour: a protocol for the systematic review and meta-analysis of genetic studies. BMJ Open 2014; 4:e005423. [PMID: 25190618 PMCID: PMC4158196 DOI: 10.1136/bmjopen-2014-005423] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 08/19/2014] [Accepted: 08/20/2014] [Indexed: 01/11/2023] Open
Abstract
INTRODUCTION Suicide is an important public health problem and one of the most common causes of death throughout the world. Suicidal behaviour is complex, and its causes are multifactorial. Case-control studies have reported an association between an alteration of the serotonin system and suicidal behaviour. Recently, it has been suggested that the 5-HTRC2 serotonin receptor gene is involved in the pathogenesis of suicidal behaviour. METHODS AND ANALYSIS To evaluate the role of the 5-HTR2C gene in suicidal behaviour, we will perform a systematic review and a meta-analysis of worldwide reports that have investigated the association between the serotonin system and suicidal behaviour. This analysis will be reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria. Studies deemed fit for inclusion in the systematic review will be scored for methodological quality using the Newcastle-Ottawa Assessment Scale (NOS). The inclusion criteria will be to present independent data, to be case-control studies and to be published in journal peer reviews. To generate more accurate analyses, we will grade the reports using the GRADES scale procedures. ETHICS AND DISSEMINATION This study will describe the association between the HTR2C gene and suicidal behaviour. The results will be reported in a peer-reviewed publication and in scientific presentations in Mexico and throughout the world. TRIAL REGISTRATION NUMBER PROSPERO CRD42014009213.
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Affiliation(s)
| | - Juárez-Rojop Isela
- División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, México
| | - Genis Alma
- Servicios de Atención Psiquiátrica (SAP), Secretaría de Salud, Instituto Nacional de Medicina Genómica (INMEGEN), México, Distrito Federal, México
| | | | - Tovilla-Zárate Carlos Alfonso
- División Académica Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Comalcalco, Tabasco, México
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Tovilla-Zárate CA, González-Castro TB, Juárez-Rojop I, Pool García S, Velázquez-Sánchez MP, Villar-Soto M, Genis A, Nicolini H, López-Narváez ML, Jiménez-Santos MA. Study on genes of the serotonergic system and suicidal behavior: protocol for a case-control study in Mexican population. BMC Psychiatry 2014; 14:29. [PMID: 24495559 PMCID: PMC3916305 DOI: 10.1186/1471-244x-14-29] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 02/03/2014] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Suicidal behavior is a leading cause of injury and death worldwide. Several studies have provided a possible relationship between genetic factors and suicidal behavior. Also, these studies have shown evidence for altered serotonergic neural transmission in the pathogenesis of suicidal behavior. In addition, genes pertaining to the serotonergic system have been proposed as candidates to establish biological correlates between suicidal behavior and the serotonergic system. The most studied genes are SCL6A4, HTR2A, HTR2C, HTR1A, HTR1B, TPH-1, and TPH-2. To get a comprehensive understanding of the association with suicidal behavior we will conduct genotype assays studies in a Mexican population. METHODS/DESIGN We will conduct a case-control study. The population sample will comprise adolescent and adult patients admitted for attempted of suicide and diagnosed by a psychiatrist. A peripheral blood sample will be taken from all the subjects (cases and controls). Genomic DNA from the leukocytes blood sample will be extracted. The genotypes of interest are distributed in the following genes: SCL6A4, HTR2A, HTR1A, HTR1B, HTR2C, TPH-2 and TPH-1. All the samples will be analyzed using a polymerase chain reaction (PCR) end-point method. We will evaluate the Hardy-Weinberg Equilibrium. The chi-squared test or Fisher's exact test will be used to compare genotype and allele frequencies between control and case groups. The Quanto 1.2 software will measure the sample size of the association. For all the association analyses the level of significance will be set at p = 0.05 and the confidence interval at 95%. DISCUSSION Suicidal behavior has been increase in Mexico, principally in young population. Our study will demonstrate the association between serotoninergic genes and suicide behavior in Mexican population.
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Affiliation(s)
- Carlos Alfonso Tovilla-Zárate
- División Académica Multidisciplinaria de Comalcalco, Ranchería Sur, Cuarta Sección, CP 86650 Comalcalco, Tabasco, México.
| | | | - Isela Juárez-Rojop
- Universidad Juárez Autónoma de Tabasco, División Académica de Ciencias de la Salud, Villahermosa, Tabasco, México
| | - Sherezada Pool García
- Hospital General de Comalcalco, Tabasco, Secretaría de Salud, Comalcalco, Tabasco, México
| | | | - Mario Villar-Soto
- Hospital de Alta Especialidad “Gustavo A. Rovirosa P”, Villahermosa, Tabasco, México
| | - Alma Genis
- Instituto Nacional de Medicina Genómica (INMEGEN), Servicios de Atención Psiquiátrica (SAP), Secretaría de Salud, México, DF, México
| | - Humberto Nicolini
- Instituto Nacional de Medicina Genómica (INMEGEN), Servicios de Atención Psiquiátrica (SAP), Secretaría de Salud, México, DF, México
| | - María Lilia López-Narváez
- CIGEN, Centro de Investigación Genómica, Comalcalco, Tabasco, México,Hospital General de Yajalón, Yajalón, Chiapas, México
| | - María Antonia Jiménez-Santos
- División Académica Multidisciplinaria de Comalcalco, Ranchería Sur, Cuarta Sección, CP 86650 Comalcalco, Tabasco, México
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Serotonergic modulation of suicidal behaviour: integrating preclinical data with clinical practice and psychotherapy. Exp Brain Res 2013; 230:605-24. [DOI: 10.1007/s00221-013-3669-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 07/30/2013] [Indexed: 11/25/2022]
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The role of the serotonergic system at the interface of aggression and suicide. Neuroscience 2013; 236:160-85. [PMID: 23333677 DOI: 10.1016/j.neuroscience.2013.01.015] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/01/2013] [Accepted: 01/05/2013] [Indexed: 02/07/2023]
Abstract
Alterations in serotonin (5-HT) neurochemistry have been implicated in the aetiology of all major neuropsychiatric disorders, ranging from schizophrenia to mood and anxiety-spectrum disorders. This review will focus on the multifaceted implications of 5-HT-ergic dysfunctions in the pathophysiology of aggressive and suicidal behaviours. After a brief overview of the anatomical distribution of the 5-HT-ergic system in the key brain areas that govern aggression and suicidal behaviours, the implication of 5-HT markers (5-HT receptors, transporter as well as synthetic and metabolic enzymes) in these conditions is discussed. In this regard, particular emphasis is placed on the integration of pharmacological and genetic evidence from animal studies with the findings of human experimental and genetic association studies. Traditional views postulated an inverse relationship between 5-HT and aggression and suicidal behaviours; however, ample evidence has shown that this perspective may be overly simplistic, and that such pathological manifestations may reflect alterations in 5-HT homoeostasis due to the interaction of genetic, environmental and gender-related factors, particularly during early critical developmental stages. The development of animal models that may capture the complexity of such interactions promises to afford a powerful tool to elucidate the pathophysiology of impulsive aggression and suicidability, and identify new effective therapies for these conditions.
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Hung CF, Lung FW, Hung TH, Chong MY, Wu CK, Wen JK, Lin PY. Monoamine oxidase A gene polymorphism and suicide: an association study and meta-analysis. J Affect Disord 2012; 136:643-9. [PMID: 22041522 DOI: 10.1016/j.jad.2011.10.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 10/08/2011] [Accepted: 10/09/2011] [Indexed: 10/15/2022]
Abstract
BACKGROUND Abnormalities in brain monoamine transmission have been implicated in the pathogenesis of suicidal behavior. Studies examining the association between monoamine oxidase A (MAOA)-uVNTR polymorphism and suicide revealed inconsistent findings. This study aims to evaluate the possible association between the MAOA-uVNTR polymorphism and suicidal behaviors by examining our own subjects and conducting a meta-analytic review. METHODS 373 unrelated psychiatric patients (including 160 suicide attempters and 213 non-suicide attempters) were genotyped for the MAOA-uVNTR polymorphism. A meta-analysis was then performed by pooling data from seven case-control association studies by random effects model. RESULTS Our results indicate that there is no association between the MAOA-uVNTR polymorphism and suicide attempts in both genders. It also reveals that there is no association with violent suicide attempts. In the meta-analysis, there is no association between the polymorphism and suicidal behaviors. Also, there is no difference in the allelic distribution between psychiatric patients with and without suicidal behaviors. Limitations Our study was constrained by the insufficient information about environmental risk factors of suicide. CONCLUSIONS Our study is the first one to use meta-analysis in exploring the role of the MAOA-uVNTR polymorphism in suicidal behavior in psychiatric patients. No significant association was found in our study, suggesting MAOA-uVNTR polymorphism is unlikely to contribute significantly to suicide behavior. Further studies investigating the gene-environment interaction or focusing on the genetic risk factors of endophenotypes of suicidal behaviors are warranted.
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Affiliation(s)
- Chi-Fa Hung
- Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Tsai SJ, Hong CJ, Liou YJ. Recent molecular genetic studies and methodological issues in suicide research. Prog Neuropsychopharmacol Biol Psychiatry 2011; 35:809-17. [PMID: 20977922 DOI: 10.1016/j.pnpbp.2010.10.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 10/17/2010] [Accepted: 10/17/2010] [Indexed: 12/16/2022]
Abstract
Suicide behavior (SB) spans a spectrum ranging from suicidal ideation to suicide attempts and completed suicide. Strong evidence suggests a genetic susceptibility to SB, including familial heritability and common occurrence in twins. This review addresses recent molecular genetic studies in SB that include case-control association, genome gene-expression microarray, and genome-wide association (GWA). This work also reviews epigenetics in SB and pharmacogenetic studies of antidepressant-induced suicide. SB fulfills criteria for a complex genetic phenotype in which environmental factors interact with multiple genes to influence susceptibility. So far, case-control association approaches are still the mainstream in SB genetic studies, although whole genome gene-expression microarray and GWA studies have begun to emerge in recent years. Genetic association studies have suggested several genes (e.g., serotonin transporter, tryptophan hydroxylase 2, and brain-derived neurotrophic factor) related to SB, but not all reports support these findings. The case-control approach while useful is limited by present knowledge of disease pathophysiology. Genome-wide studies of gene expression and genetic variation are not constrained by our limited knowledge. However, the explanatory power and path to clinical translation of risk estimates for common variants reported in genome-wide association studies remain unclear because of the presence of rare and structural genetic variation. As whole genome sequencing becomes increasingly widespread, available genomic information will no longer be the limiting factor in applying genetics to clinical medicine. These approaches provide exciting new avenues to identify new candidate genes for SB genetic studies. The other limitation of genetic association is the lack of a consistent definition of the SB phenotype among studies, an inconsistency that hampers the comparability of the studies and data pooling. In summary, SB involves multiple genes interacting with non-genetic factors. A better understanding of the SB genes by combining whole genome approaches with case-control association studies, may potentially lead to developing effective screening, prevention, and management of SB.
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Affiliation(s)
- Shih-Jen Tsai
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan.
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Manchia M, Zai CC, Squassina A, Vincent JB, De Luca V, Kennedy JL. Mixture regression analysis on age at onset in bipolar disorder patients: investigation of the role of serotonergic genes. Eur Neuropsychopharmacol 2010; 20:663-70. [PMID: 20452754 DOI: 10.1016/j.euroneuro.2010.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 03/28/2010] [Accepted: 04/06/2010] [Indexed: 11/15/2022]
Abstract
Bipolar Disorder (BPD) is a complex psychiatric disease with a relevant underlying genetic basis. HTR2A T102C, HTR2C Cys23Ser, SLC6A4 5-HTTLPR and rs25531 polymorphisms were genotyped in 230 BPD patients and inserted as covariates in a mixture regression model of age at onset (AAO). 5-HTTLPR polymorphism associated with early onset component under recessive and additive model. HTR2A T102C, HTR2C Cys23Ser and 5-HTTLPR interaction terms associated with early onset component under dominant, recessive and additive model. These findings suggest a role of genes codifying for elements of the serotonergic system in influencing the AAO in BPD.
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Affiliation(s)
- Mirko Manchia
- Laboratory of Molecular Genetics, Department of Neurosciences B.B. Brodie, University of Cagliari, Cagliari, Italy.
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