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Genis-Mendoza AD, Hernández-Díaz Y, González-Castro TB, Tovilla-Zárate CA, Castillo-Avila RG, López-Narváez ML, Ramos-Méndez MÁ, Nicolini H. Association between TPH1 polymorphisms and the risk of suicide behavior: An updated meta-analysis of 18,398 individuals. Front Psychiatry 2022; 13:932135. [PMID: 35928776 PMCID: PMC9343722 DOI: 10.3389/fpsyt.2022.932135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 06/30/2022] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES We aimed to examine the association of TPH1 polymorphisms with the risk of suicide behavior (SB). DESIGN Systematic review and meta-analysis. METHOD All relevant studies that evaluated the association between the A218C (rs1800532), A779C (rs1799913) and A6526G (rs4537731) polymorphisms and the susceptibility to SB published up to September 2021 were identified through a comprehensive systematic search in PubMed, Scopus, EBSCO and Science Direct electronic databases. The association between TPH1 gene polymorphisms and SB was evaluated using inherence models by odds ratio (OR) and 95% confidence interval (CI). Subgroup analyses, heterogeneity analyses, and publication bias were also tested in this meta-analysis. RESULTS The meta-analysis for TPH1 A218C revealed an increased risk of SB in the dominant model (OR = 1.11, 95%CI 1.01-1.22). We also observed a positive association in the allelic (OR = 1.13, 95%CI 1.05-1.21), homozygous (OR = 1.22, 95%CI 1.06-1.40), heterozygous (OR = 1.21, 95%CI 1.08-1.37) and dominant (OR = 1.21, 95%CI 1.09-1.34) inherence models with the suicide attempt. Additionally, in the heterozygous (OR = 0.84, 95%CI 0.73-0.97) and dominant (OR = 0.79, 95%CI 0.68-0.91) inherence models we detected an association with completed suicide. Based on ethnicity, an association of SB in the European population also was observed (OR = 1.29, 95%CI 1.12-1.51). However, for both A779C and A6526G polymorphisms we did not find evidence of an association with SB. CONCLUSION This meta-analysis suggests that the A218C polymorphism of TPH1 gene could be a possible risk factor of SB. Future large-scale studies are required to analyze the molecular mechanisms by which affect the susceptibility of developing suicide behavior.
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Affiliation(s)
- Alma Delia Genis-Mendoza
- Laboratorio de Genómica de Enfermedades Psiquiátricas y Neurodegenerativas, Instituto Nacional de Medicina Genómica, Ciudad de México, Mexico
| | - Yazmín Hernández-Díaz
- División Académica Multidisciplinaria de Jalpa de Méndez, Universidad Juárez Autónoma de Tabasco, Jalpa de Méndez, Mexico
| | - Thelma Beatriz González-Castro
- División Académica Multidisciplinaria de Jalpa de Méndez, Universidad Juárez Autónoma de Tabasco, Jalpa de Méndez, Mexico
| | | | | | | | - Miguel Ángel Ramos-Méndez
- División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Mexico
| | - Humberto Nicolini
- Laboratorio de Genómica de Enfermedades Psiquiátricas y Neurodegenerativas, Instituto Nacional de Medicina Genómica, Ciudad de México, Mexico
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Nielsen DA, Deng H, Patriquin MA, Harding MJ, Oldham J, Salas R, Fowler JC, Frueh BC. Association of TPH1 and serotonin transporter genotypes with treatment response for suicidal ideation: a preliminary study. Eur Arch Psychiatry Clin Neurosci 2020; 270:633-642. [PMID: 30923939 DOI: 10.1007/s00406-019-01009-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 03/26/2019] [Indexed: 12/14/2022]
Abstract
Variants in three genes coding for components of the serotonergic system, the tryptophan hydroxylase 1 (TPH1) rs1799913, serotonin transporter (SLC6A4) 5-HTTLPR, and serotonin receptor 2A (HTR2A) rs6311, were evaluated for association with suicidal ideation (SI) and with recovery from SI in a psychiatric inpatient population. Five hundred and eighty-two adult inpatients, including 390 patients who had SI, collected from December 2012 to April 2016 were assessed. SI recovery, calculated as change in SI between the first two-week period after admission and weeks 5 and 6, was appraised for association with the three variants. In this preliminary study, both TPH1 and 5-HTTLPR genotypes were associated with recovery (TPH1: recessive model, increased recovery with AC genotype, P = 0.026; additive model, increased recovery with AC genotype, P = 0.037; 5-HTTLPR: recessive model, increased recovery with AC, P = 0.043). When patients with comorbid alcohol use disorder (AUD) were removed, given that TPH1 has been associated with alcoholism, the associations of those recovered from SI with TPH1 rs1799913 remained significant for the additive (increased recovery with AC, P = 0.045) and recessive (increased recovery with C-carriers, P = 0.008) models, and with 5-HTTLPR using the dominant model (increased recovery with S'S', P = 0.016). In females, an association of SI recovery with TPH1 rs1799913 was found using a recessive model (increased recovery with C-carriers, P = 0.031), with 5-HTTLPR using additive (increased recovery with L'S', P = 0.048) and recessive (increased recovery with S'S', P = 0.042) models. Additionally, an association of SI with TPH1 rs1799913 was found in females using both additive (increased risk in AC, P = 0.033) and recessive (increased risk in C-carriers, P = 0.043) models, and with 5-HTTLPR using a recessive model (increased risk in S'S', P = 0.030). This study provides evidence that variation in the TPH1 and serotonin transporter genes play key roles in moderating recovery from SI during treatment in an inpatient psychiatric clinic.
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Affiliation(s)
- David A Nielsen
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA. .,Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, USA. .,Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.
| | - Huiqiong Deng
- Department of Psychiatry and Behavioral Sciences, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Michelle A Patriquin
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA.,Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,The Menninger Clinic, Houston, TX, USA
| | - Mark J Harding
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA.,Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA
| | - John Oldham
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA
| | - Ramiro Salas
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA.,Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA.,The Menninger Clinic, Houston, TX, USA
| | - J Christopher Fowler
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA.,The Menninger Clinic, Houston, TX, USA
| | - B Christopher Frueh
- The Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 2002 Holcombe Blvd., Research 151, Building 110, Suite 227, Houston, TX, 77030, USA.,The Menninger Clinic, Houston, TX, USA.,Department of Psychology, University of Hawaii, Hilo, USA
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3
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Beden O, Senol E, Atay S, Ak H, Altintoprak AE, Kiyan GS, Petin B, Yaman U, Aydin HH. TPH1 A218 allele is associated with suicidal behavior in Turkish population. Leg Med (Tokyo) 2016; 21:15-8. [DOI: 10.1016/j.legalmed.2016.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 05/08/2016] [Accepted: 05/17/2016] [Indexed: 10/21/2022]
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Mirkovic B, Laurent C, Podlipski MA, Frebourg T, Cohen D, Gerardin P. Genetic Association Studies of Suicidal Behavior: A Review of the Past 10 Years, Progress, Limitations, and Future Directions. Front Psychiatry 2016; 7:158. [PMID: 27721799 PMCID: PMC5034008 DOI: 10.3389/fpsyt.2016.00158] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 08/31/2016] [Indexed: 12/21/2022] Open
Abstract
Suicidal behaviors (SBs), which range from suicidal ideation to suicide attempts and completed suicide, represent a fatal dimension of mental ill-health. The involvement of genetic risk factors in SB is supported by family, twin, and adoption studies. The aim of this paper is to review recent genetic association studies in SBs including (i) case-control studies, (ii) family-based association studies, and (iii) genome-wide association studies (GWAS). Various studies on genetic associations have tended to suggest that a number of genes [e.g., tryptophan hydroxylase, serotonin receptors and transporters, or brain-derived neurotrophic factors (BDNFs)] are linked to SBs, but these findings are not consistently supported by the results obtained. Although the candidate-gene approach is useful, it is hampered by the present state of knowledge concerning the pathophysiology of diseases. Interpretations of GWAS results are mostly hindered by a lack of annotation describing the functions of most variation throughout the genome. Association studies have addressed a wide range of single-nucleotide polymorphisms in numerous genes. We have included 104 such studies, of which 10 are family-based association studies and 11 are GWAS. Numerous meta-analyses of case-control studies have shown significant associations of SB with variants in the serotonin transporter gene (5-HTT or SLC6A4) and the tryptophan hydroxylase 1 gene (TPH1), but others report contradictory results. The gene encoding BDNF and its receptor (NTRK2) are also promising candidates. Only two of the GWAS showed any significant associations. Several pathways are mentioned in an attempt to understand the lack of reproducibility and the disappointing results. Consequently, we review and discuss here the following aspects: (i) sample characteristics and confounding factors; (ii) statistical limits; (iii) gene-gene interactions; (iv) gene, environment, and by time interactions; and (v) technological and theoretical limits.
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Affiliation(s)
- Bojan Mirkovic
- Department of Child and Adolescent Psychiatry, CHU Charles Nicolle, Rouen, France; INSERM Unit U1079, Genetics of Cancer and Neurogenetics, University of Rouen, Rouen, France; Department of Child and Adolescent Psychiatry, Hôpital Pitié-Salpêtrière, Paris, France
| | - Claudine Laurent
- Department of Child and Adolescent Psychiatry, Hôpital Pitié-Salpêtrière, Paris, France; ICM - Brain and Spine Institute, Hôpital Pitié-Salpêtrière - University Pierre and Marie Curie, Paris, France
| | | | - Thierry Frebourg
- INSERM Unit U1079, Genetics of Cancer and Neurogenetics, University of Rouen, Rouen, France; Department of Genetics, CHU Charles Nicolle, Rouen, France
| | - David Cohen
- Department of Child and Adolescent Psychiatry, Hôpital Pitié-Salpêtrière, Paris, France; UMR 7222, Institute for Intelligent Systems and Robotics, University Pierre and Marie Curie, Paris, France
| | - Priscille Gerardin
- Department of Child and Adolescent Psychiatry, CHU Charles Nicolle, Rouen, France; Laboratoire Psy-NCA-EA-4700, University of Rouen, Rouen, France
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López-Narváez ML, Tovilla-Zárate CA, González-Castro TB, Juárez-Rojop I, Pool-García S, Genis A, Ble-Castillo JL, Fresán A. Association analysis of TPH-1 and TPH-2 genes with suicidal behavior in patients with attempted suicide in Mexican population. Compr Psychiatry 2015; 61:72-7. [PMID: 26028568 DOI: 10.1016/j.comppsych.2015.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 04/30/2015] [Accepted: 05/06/2015] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Suicidal behavior is a worldwide health problem. Tryptophan hydroxylase (TPH) is a rate limiting enzyme in the biosynthesis of serotonergic neurotransmission. TPH-1 and TPH-2 genes encode for TPH isoforms and have been implicated as candidate genes for suicidal behavior. The aim of this study was to evaluate the association between the genetic variants of the TPH-1 (rs21102 and 1607395) and TPH-2 (rs4290270, rs7305115 and rs1007023) genes and suicidal behavior in a Mexican population. METHODS We conducted a case-control study including 200 cases with suicide attempt and 263 controls. Patients were evaluated by a trained psychiatrist or clinical psychologists. Five polymorphisms were genotyped and assessed for allele, genotype and haplotype association with suicide attempt. RESULTS The rs7305115 polymorphism of the TPH-2 gene was associated with suicidal behavior in a Mexican population in genotype (χ(2)=6.02, df=2, p=0.04) and allele (OR=1.39, 95%IC=1.06-1.81, p=0.01) frequencies. The THP-2 haplotypes GTA (χ(2)=5.68, p=0.01) and ATT (χ(2)=5.0, p=0.02) were associated with risk for suicide attempt. CONCLUSION Our results provide evidence for an association between the rs7305115 polymorphism of the TPH-2 gene and suicidal behavior in a Mexican population. However, more studies are necessary to replicate these results using larger samples.
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Affiliation(s)
| | - Carlos Alfonso Tovilla-Zárate
- Universidad Juárez Autónoma de Tabasco, División Académica Multidisciplinaria de Comalcalco, Comalcalco, Tabasco, México.
| | - Thelma Beatriz González-Castro
- Universidad Juárez Autónoma de Tabasco, División Académica Multidisciplinaria de Jalpa de Méndez, Cunduacán, 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.
| | - Alma Genis
- Instituto Nacional de Medicina Genómica (INMEGEN), Servicios de Atención Psiquiátrica (SAP), Secretaría de Salud, México, D. F., México.
| | - Jorge L Ble-Castillo
- Universidad Juárez Autónoma de Tabasco, División Académica de Ciencias de la Salud, Villahermosa, Tabasco, México.
| | - Ana Fresán
- Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, México, D. F., México.
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6
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González-Castro TB, Juárez-Rojop I, López-Narváez ML, Tovilla-Zárate CA. Association of TPH-1 and TPH-2 gene polymorphisms with suicidal behavior: a systematic review and meta-analysis. BMC Psychiatry 2014; 14:196. [PMID: 25005534 PMCID: PMC4099217 DOI: 10.1186/1471-244x-14-196] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Accepted: 06/27/2014] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND It is widely acknowledged that suicidal behavior (SB) has a genetic influence. As a consequence, molecular genetic studies have been mostly conducted on serotonergic genes. One of the most promising candidate genes of this system is tryptophan hydroxylase (TPH). Although there have been several positive studies associating TPH genes and SB, the evidence is not entirely consistent. Therefore, we performed a meta-analysis to gain a better understanding into this issue. METHODS The meta-analysis was conducted with 37 articles of genetic association studies of TPH-1 (A218C and A779C) and TPH2 (G-703 T, A-473 T and G19918A) genes. To analyze the association of these variants with SB we used the following models: allelic, additive, dominant and recessive. In addition, we performed a sub-group analysis by Caucasian and Asian populations using the same four models. RESULTS TPH-1 gene variants showed a positive significant association with SB, but only in the fixed effects models. With regard to TPH-2 gene variants we could not find an association with SB. CONCLUSIONS The study provides evidence that A218C/A779C TPH-1 variants may be a risk factor to manifest SB at the clinical level, which is in agreement with previously reported meta-analyses. With regard to G-703 T/A-473 T/G19918A TPH-2 variants, our up-to-date meta-analysis could not detect any significant association between those genetic variants and SB. However, these results should be interpreted with caution since further studies need to be undertaken using larger sample sizes in different ethnic populations to confirm our findings.
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Affiliation(s)
| | - Isela Juárez-Rojop
- División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, México
| | - María Lilia López-Narváez
- CIGEN, Centro de Investigación Genómica, Comalcalco, Tabasco, México,Hospital General de Yajalón, Yajalón, Chiapas, México
| | - Carlos Alfonso Tovilla-Zárate
- División Multidisciplinaria de Comalcalco, Universidad Juárez Autónoma de Tabasco, Ranchería Sur, Cuarta Sección, Comalcalco, Tabasco, C,P, 86650, México.
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Bae SM, Lee YJ, Cho IH, Kim SJ, Im JS, Cho SJ. Risk factors for suicidal ideation of the general population. J Korean Med Sci 2013; 28:602-7. [PMID: 23579548 PMCID: PMC3617315 DOI: 10.3346/jkms.2013.28.4.602] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Accepted: 01/30/2013] [Indexed: 12/03/2022] Open
Abstract
The aim of this study was to investigate risk factors of suicide ideation in general population. A total of 1,116 adults were sampled with randomization in an urban area. After excluding 116 participants due to incomplete answer, 1,000 participants (500 males; mean age 39.6 ± 11.6) completed self-report questionnaire including the Center for Epidemiologic Study Depression Scale (CES-D), the Beck Scale for Suicide Ideation (BSI), the Spielberger State-Trait Anger Expression Inventory (STAXI), the Barratt Impulsiveness Scale (BIS), and questions on weekday sleep duration. Results showed higher scores on the BSI were related with higher scores on the STAXI, CES-D, a family history of psychiatric illness, and short or long sleep duration (≤ 5 or ≥ 10 hr) (adjusted R (2) = 0.151, P < 0.001, P < 0.001, P = 0.001, and P = 0.008, respectively). The predictive power of the STAXI scores, the presence of psychiatric family history and short or long sleep duration was stronger in the high CES-D group with scores of 16 or higher (adjusted R (2) = 0.275, P < 0.001, P < 0.001, and P < 0.001, respectively). These findings suggest that suicide idea in general population may be related with the presence of family history for psychiatric illness, depressive mood, high anger and short or long sleep duration.
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Affiliation(s)
- Seung-Min Bae
- Department of Psychiatry, Gachon University Gil Medical Center, Incheon, Korea
| | - Yu Jin Lee
- Department of Psychiatry, Gachon University Gil Medical Center, Incheon, Korea
| | - In Hee Cho
- Department of Psychiatry, Gachon University Gil Medical Center, Incheon, Korea
| | - Seog Ju Kim
- Department of Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jeong Soo Im
- Department of Preventive Medicine, Gachon University, Incheon, Korea
| | - Seong-Jin Cho
- Department of Psychiatry, Gachon University Gil Medical Center, Incheon, Korea
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8
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Drago A, De Ronchi D, Serretti A. Incomplete coverage of candidate genes: a poorly considered bias. Curr Genomics 2011; 8:476-83. [PMID: 19412419 PMCID: PMC2647155 DOI: 10.2174/138920207783591681] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2007] [Revised: 10/22/2007] [Accepted: 11/01/2007] [Indexed: 12/31/2022] Open
Abstract
Current genetic investigations are performed both on the basis of a rational and biologically based choice of candidate genes and through genome wide scans. Nonetheless, lack of replication is a common problem in psychiatric genetics as well as in other genetic fields. There are a number of reasons for this inconsistency, among them a well known but poorly considered issue is gene coverage. The aim of the present paper is to focus on this well known and defectively deemed bias, especially when a candidate gene approach is chosen. The rational and the technical feasibility of this proposal are discussed as well as a survey of current investigations. The known consistent methodology to fix this bias is also discussed.
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Affiliation(s)
- Antonio Drago
- Institute of Psychiatry, University of Bologna, Italy
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Hwang IC, Lee KS, Park DK, Jung EY, Choi CH, Cho SJ, Bae SM. Association with Self-Perception for Obesity and Mental Health among Korean Adolescent. Soa Chongsonyon Chongsin Uihak 2011. [DOI: 10.5765/jkacap.2011.22.2.112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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10
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Abstract
BACKGROUND Suicide rates vary widely across nations and ethnic groups. This study aims to explore potential factors contributing to inter-ethnic differences in suicide rates. METHOD Study subjects came from a case-control psychological autopsy study conducted in Taiwan, including 116 consecutive suicides from two aboriginal groups and Taiwanese Han; 113 of them each matched with two living controls. Gender-, age- and method-specific suicide rates, population attributable fraction (PAF) of suicide for five major risk factors, help-seeking before suicide and emergency medical aid after suicide were compared between the three ethnic groups. RESULTS One aboriginal group (the Atayal) had significantly higher adjusted rate ratios (RR) of suicide than the other aboriginal group (the Ami) [RR 0.20, 95% confidence intervals (CI) 0.12-0.34] and the Han (RR 0.26, 95% CI 0.16-0.40). Such differences can be explained by higher PAFs of suicide for three major risk factors (substance dependence, PAF 47.6%, 95% CI 25.5-64.2; emotionally unstable personality disorder, PAF 52.7%, 95% CI 32.8-69.0; family history of suicidal behaviour, PAF 43.5%, 95% CI 23.2-60.2) in this group than in the other two groups. This higher suicide rate was substantially reduced from 68.2/100 000 per year to 9.1/100 000 per year, comparable with the other two groups, after stepwise removal of the effects of these three risk factors. Suicide rates by self-poisoning were also significantly higher in this group than in the other two groups. CONCLUSIONS Higher rates of specific risk factors and use of highly lethal pesticides for suicide contributed to the higher suicide rate in one ethnic group in Taiwan. These findings have implications for developing ethnicity-relevant suicide prevention strategies.
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Affiliation(s)
- I C Liu
- Department of Psychiatry, Fu Jen Catholic University, Taipei County, Taiwan
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Saetre P, Lundmark P, Wang A, Hansen T, Rasmussen HB, Djurovic S, Melle I, Andreassen OA, Werge T, Agartz I, Hall H, Terenius L, Jönsson EG. The tryptophan hydroxylase 1 (TPH1) gene, schizophrenia susceptibility, and suicidal behavior: a multi-centre case-control study and meta-analysis. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:387-396. [PMID: 19526457 DOI: 10.1002/ajmg.b.30991] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Serotonin (5-hydroxytryptamin; 5-HT) alternations has since long been suspected in the pathophysiology of schizophrenia. Tryptophan hydroxylase (tryptophan 5-monooxygenase; TPH) is the rate-limiting enzyme in the biosynthesis of 5-HT, and sequence variation in intron 6 of the TPH1 gene has been associated with schizophrenia. The minor allele (A) of this polymorphism (A218C) is also more frequent in patients who have attempted suicide and individuals who died by suicide, than in healthy control individuals. In an attempt to replicate previous findings, five single nucleotide polymorphisms (SNPs) were genotyped in 837 Scandinavian schizophrenia patients and 1,473 controls. Three SNPs spanning intron 6 and 7, including the A218C and A779C polymorphisms, were associated with schizophrenia susceptibility (P = 0.019). However there were no differences in allele frequencies of these loci between affected individuals having attempted suicide at least once and patients with no history of suicide attempts (P = 0.84). A systematic literature review and meta-analysis support the A218C polymorphism as a susceptibility locus for schizophrenia (odds ratio 1.17, 95% confidence interval 1.07-1.29). Association studies on suicide attempts are however conflicting (heterogeneity index I(2) = 0.54) and do not support the A218C/A779C polymorphisms being a susceptibility locus for suicidal behavior among individuals diagnosed with a psychiatric disorder (OR = 0.96 [0.80-1.16]). We conclude that the TPH1 A218/A779 locus increases the susceptibility of schizophrenia in Caucasian and Asian populations. In addition, the data at hand suggest that the locus contributes to the liability of psychiatric disorders characterized by elevated suicidal rates, rather than affecting suicidal behavior of individuals suffering from a psychiatric disorder.
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Affiliation(s)
- Peter Saetre
- Department of Clinical Neuroscience, HUBIN Project, Karolinska Institutet and Hospital, Stockholm, Sweden
| | - Per Lundmark
- Department of Medical Sciences, Molecular Medicine, Uppsala University, Uppsala, Sweden
| | - August Wang
- Mental Health Center Amager, Copenhagen University Hospital, Copenhagen, Denmark
| | - Thomas Hansen
- Research Institute of Biological Psychiatry, Copenhagen University Hospital, Mental Health Centre Sct. Hans, Roskilde, Denmark.,Centre for Pharmacogenomics, University of Copenhagen, Copenhagen N, Denmark
| | - Henrik B Rasmussen
- Research Institute of Biological Psychiatry, Copenhagen University Hospital, Mental Health Centre Sct. Hans, Roskilde, Denmark
| | - Srdjan Djurovic
- Institute of Psychiatry, University of Oslo, Oslo, Norway.,Department of Medical Genetics, Ullevål University Hospital, Oslo, Norway.,Department of Psychiatry, Ullevål University Hospital, Oslo, Norway
| | - Ingrid Melle
- Institute of Psychiatry, University of Oslo, Oslo, Norway.,Department of Medical Genetics, Ullevål University Hospital, Oslo, Norway.,Department of Psychiatry, Ullevål University Hospital, Oslo, Norway
| | - Ole A Andreassen
- Institute of Psychiatry, University of Oslo, Oslo, Norway.,Department of Medical Genetics, Ullevål University Hospital, Oslo, Norway.,Department of Psychiatry, Ullevål University Hospital, Oslo, Norway
| | - Thomas Werge
- Research Institute of Biological Psychiatry, Copenhagen University Hospital, Mental Health Centre Sct. Hans, Roskilde, Denmark
| | - Ingrid Agartz
- Department of Clinical Neuroscience, HUBIN Project, Karolinska Institutet and Hospital, Stockholm, Sweden.,Institute of Psychiatry, University of Oslo, Oslo, Norway.,Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Håkan Hall
- Department of Clinical Neuroscience, HUBIN Project, Karolinska Institutet and Hospital, Stockholm, Sweden
| | - Lars Terenius
- Department of Clinical Neuroscience, HUBIN Project, Karolinska Institutet and Hospital, Stockholm, Sweden
| | - Erik G Jönsson
- Department of Clinical Neuroscience, HUBIN Project, Karolinska Institutet and Hospital, Stockholm, Sweden
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Magno LAV, Miranda DM, Neves FS, Pimenta GJ, Mello MP, De Marco LA, Correa H, Romano-Silva MA. Association between AKT1 but not AKTIP genetic variants and increased risk for suicidal behavior in bipolar patients. GENES BRAIN AND BEHAVIOR 2010; 9:411-8. [DOI: 10.1111/j.1601-183x.2010.00571.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cordeiro Q, Souza BR, Correa H, Guindalini C, Hutz MH, Vallada H, Romano-Silva MA. A review of psychiatric genetics research in the Brazilian population. BRAZILIAN JOURNAL OF PSYCHIATRY 2009; 31:154-62. [DOI: 10.1590/s1516-44462009000200013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Accepted: 12/04/2008] [Indexed: 01/11/2023]
Abstract
OBJECTIVE AND METHOD: A large increase in the number of Brazilian studies on psychiatric genetics has been observed in the 1970's since the first publications conducted by a group of researchers in Brazil. Here we reviewed the literature and evaluated the advantages and difficulties of psychiatric genetic studies in the Brazilian population. CONCLUSION: The Brazilian population is one of the most heterogeneous populations in the world, formed mainly by the admixture between European, African and Native American populations. Although the admixture process is not a particularity of the Brazilian population, much of the history and social development in Brazil underlies the ethnic melting pot we observe nowadays. Such ethnical heterogeneity of the Brazilian population obviously brings some problems when performing genetic studies. However, the Brazilian population offers a number of particular characteristics that are of major interest when genetic studies are carried out, such as the presence of isolated populations. Thus, differences in the genetic profile and in the exposure to environmental risks may result in different interactions and pathways to psychopathology.
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Diaconu G, Turecki G. Family history of suicidal behavior predicts impulsive-aggressive behavior levels in psychiatric outpatients. J Affect Disord 2009; 113:172-8. [PMID: 18504057 DOI: 10.1016/j.jad.2008.03.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Revised: 03/25/2008] [Accepted: 03/26/2008] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Impulsive-aggressive traits have been proposed as mediators of the transmission of suicidal behavior in families. Our aim was to investigate the association between family history of suicidal behavior, and expressions of impulsivity and aggressive behavior, in a clinical population. METHODS A sample of n=474 psychiatric outpatient subjects were assessed by means of standardized interviews for Axis I and II psychopathology, history of suicidal behavior in subjects and their family, and measures of impulsive-aggressive behaviors (IAB). RESULTS A total of n=38 (8%) probands had a family history of suicidal behavior. This was three times more frequent in patients with a personal history of suicidality, irrespective of their own psychopathology (p<0.001), and four times more frequent in suicide attempters with depression vs. depressed non-attempters (p<0.005). A family history of suicidal behavior was associated with higher impulsive (p<0.005) and aggressive behavior measures (p<0.01) in probands. LIMITATIONS Retrospective design and family-history methodology; Limited sample; Contagion and imitation effects could not be assessed based on available data. CONCLUSIONS Impulsive-aggressive behaviors are significantly elevated in persons who have a familial loading of suicidal behavior.
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Affiliation(s)
- Gabriel Diaconu
- McGill Group for Suicide Studies, Douglas Hospital Research Centre, McGill University, Montréal, Québec, Canada
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Abstract
Genetic epidemiology research has shown that genes contribute to suicide risk. Unfortunately, the first 30 years of candidate-based association studies have provided little information about the specific genetic contributors. This article reviews genetic association studies of suicidal phenotypes published to date. Possible theoretical, methodological, and operational challenges accounting for the modest success of association studies in the field are also discussed. The authors conclude that future research may benefit from using a more systematic and comprehensive selection of candidate genes and variants, examining gene-environment and gene-gene interactions, and investigating higher-order moderators.
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Affiliation(s)
- Jelena Brezo
- Department of Psychiatry, McGill Group for Suicide Studies, 6875 La Salle Boulevard, Montreal, Quebec, H4H 1R3, Canada
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Ham BJ, Lee BC, Paik JW, Kang RH, Choi MJ, Choi IG, Lee MS. Association between the tryptophan hydroxylase-1 gene A218C polymorphism and citalopram antidepressant response in a Korean population. Prog Neuropsychopharmacol Biol Psychiatry 2007; 31:104-7. [PMID: 16979275 DOI: 10.1016/j.pnpbp.2006.08.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2006] [Revised: 08/02/2006] [Accepted: 08/02/2006] [Indexed: 10/24/2022]
Abstract
Tryptophan hydroxylase-1 (TPH1) is the rate-limiting enzyme in serotonin biosynthesis, and selective serotonin reuptake inhibitors (SSRIs) exert their activity enhancing the general serotonergic tone. Citalopram is the most selective SSRI, with little or no affinity for a variety of receptor types. The goal of this study was to investigate whether the A218C polymorphism of the TPH1 gene is associated with the citalopram antidepressant response in subjects with major depressive disorder (MDD). All of the patients were evaluated using the 21-item Hamilton Depression Rating Scale before beginning and after 8 weeks of citalopram treatment. Genotyping was performed with the polymerase chain reaction. The remission rate to citalopram treatment was worse in MDD subjects with the TPH1 A/A and A/C genotypes than in those with the TPH1 C/C genotype. Our results suggest that the A218C polymorphism of the TPH1 gene serves as a modulator of antidepressant activity, especially in terms of treatment remission.
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Affiliation(s)
- Byung-Joo Ham
- Department of Psychiatry, Hangang Sacred Heart Hospital, Hallym University Medical Center, Korea
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