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Bourdin V, Mulier G, Calle S, Minart N, Charlier P. The last jump: epidemiology of suicides at the Tour Eiffel (Paris) between 1950 and 1989. Forensic Sci Med Pathol 2024; 20:360-369. [PMID: 38085425 DOI: 10.1007/s12024-023-00707-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2023] [Indexed: 08/03/2024]
Abstract
The Eiffel Tower (Paris, France) has been attracting many candidates for suicide over the years. The aim of this study was to determine the patterns of people who committed suicide by jumping. Permission to access the unpublished records of the Paris Police Prefecture made it possible to compile press articles related to suicides from April 1950 to March 1989. 155 articles corresponding to 79 cases were kept for analysis. There were significantly more males (66%), as compared with an expected theoretical distribution of 1/2 for each sex (p = 0.002). Median age was 38.0 years old. Suicide peak was reached during the months of August and October (13% for each), while February was poor in suicides (3%). Tuesdays and Saturdays were the more impacted days. Hourly suicide rates were 8% (morning), 11% (noon), 7% (afternoon), and 5% (evening-night). Moon phases did not correlate with suicide occurrence. The main context described was that of a psychiatric pathology (49%). Death occurred in 92% of the reported cases. Sex ratio, ages, decrease during the cold season, no association with moon phases, and underlying psychiatric pathologies were consistent with trends for either all-cause suicides or suicide jumps from a platform. Conversely, unusual trough in suicides on Mondays and noon peak in suicide rate have been, respectively, attributed to small sample size and closure at night. As jumping corresponds to both ease and proximity, we believe the implementation of protective measures in the early 1960s succeeded in reducing the number of suicides overall.
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Affiliation(s)
- Virginie Bourdin
- Direction Département de la Recherche et de l'Enseignement, Musée du Quai Branly - Jacques Chirac, 222 rue de l'Université, 75007, Paris, France.
- Laboratoire Anthropologie, Archéologie, Biologie (LAAB), Université Paris-Saclay (UVSQ), UFR des Sciences de la Santé, 2 avenue de la source de la Bièvre, 78180, Montigny-le-Bretonneux, France.
| | - Guillaume Mulier
- Département de biostatistiques et d'épidémiologie, Institut Gustave Roussy, 94800, Villejuif, France
| | - Sophie Calle
- Perrotin, 2bis avenue Matignon, 75008, Paris, France
| | - Nathalie Minart
- Archives of the Police Prefecture of Paris, 25-27 rue Baudin, 93310, Le Pré-Saint-Gervais, France
| | - Philippe Charlier
- Direction Département de la Recherche et de l'Enseignement, Musée du Quai Branly - Jacques Chirac, 222 rue de l'Université, 75007, Paris, France
- Laboratoire Anthropologie, Archéologie, Biologie (LAAB), Université Paris-Saclay (UVSQ), UFR des Sciences de la Santé, 2 avenue de la source de la Bièvre, 78180, Montigny-le-Bretonneux, France
- Fondation Anthropologie, Archéologie, Biologie (FAAB) - Institut de France, Palais de l'Institut, 23 quai de Conti, 75006, Paris, France
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Nguyen TML, Jollant F, Tritschler L, Colle R, Corruble E, Gardier AM. [Ketamine and suicidal behavior: Contribution of animal models of aggression-impulsivity to understanding its mechanism of action]. ANNALES PHARMACEUTIQUES FRANÇAISES 2024; 82:3-14. [PMID: 37890717 DOI: 10.1016/j.pharma.2023.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 10/16/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023]
Abstract
More than two-thirds of suicides occur during a major depressive episode. Acting out prevention measures and therapeutic options to manage the suicidal crisis are limited. The impulsive-aggressive dimensions are vulnerability factors associated with suicide in patients suffering from a characterized depressive episode: this can be a dimension involved in animals. Impulsive and aggressive rodent models can help analyze, at least in part, the neurobiology of suicide and the beneficial effects of treatments. Ketamine, a glutamatergic antagonist, by rapidly improving the symptoms of depressive episodes, would help reduce suicidal thoughts in the short term. Animal models share with humans impulsive and aggressive endophenotypes modulated by the serotonergic system (5-HTB receptor, MAO-A enzyme), neuroinflammation or the hypothalamic-pituitary-adrenal axis and stress. Significant effects of ketamine on these endophenotypes remain to be demonstrated.
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Affiliation(s)
- Thi Mai Loan Nguyen
- Inserm CESP/UMR 1018, équipe MOODS, faculté de pharmacie, université Paris-Saclay, 91400 Orsay, France
| | - Fabrice Jollant
- Inserm CESP/UMR 1018, équipe MOODS, faculté de médecine, université Paris-Saclay, 94270 Le Kremin-Bicêtre, France; Service hospitalo-universitaire de psychiatrie, hôpital de Bicêtre, hôpitaux universitaires Paris-Saclay, Assistance publique-Hôpitaux de Paris (AP-HP), 94275 Le Kremlin-Bicêtre, France; Pôle de psychiatrie, CHU de Nîmes, Nîmes, France; Département de psychiatrie, Université McGill et Groupe McGill d'études sur le suicide, Montréal, Canada
| | - Laurent Tritschler
- Inserm CESP/UMR 1018, équipe MOODS, faculté de pharmacie, université Paris-Saclay, 91400 Orsay, France
| | - Romain Colle
- Inserm CESP/UMR 1018, équipe MOODS, faculté de médecine, université Paris-Saclay, 94270 Le Kremin-Bicêtre, France; Service hospitalo-universitaire de psychiatrie, hôpital de Bicêtre, hôpitaux universitaires Paris-Saclay, Assistance publique-Hôpitaux de Paris (AP-HP), 94275 Le Kremlin-Bicêtre, France
| | - Emmanuelle Corruble
- Inserm CESP/UMR 1018, équipe MOODS, faculté de médecine, université Paris-Saclay, 94270 Le Kremin-Bicêtre, France; Service hospitalo-universitaire de psychiatrie, hôpital de Bicêtre, hôpitaux universitaires Paris-Saclay, Assistance publique-Hôpitaux de Paris (AP-HP), 94275 Le Kremlin-Bicêtre, France
| | - Alain M Gardier
- Inserm CESP/UMR 1018, équipe MOODS, faculté de pharmacie, université Paris-Saclay, 91400 Orsay, France.
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Popova NK, Tsybko AS, Naumenko VS. The Implication of 5-HT Receptor Family Members in Aggression, Depression and Suicide: Similarity and Difference. Int J Mol Sci 2022; 23:ijms23158814. [PMID: 35955946 PMCID: PMC9369404 DOI: 10.3390/ijms23158814] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 07/21/2022] [Accepted: 08/06/2022] [Indexed: 11/16/2022] Open
Abstract
Being different multifactorial forms of psychopathology, aggression, depression and suicidal behavior, which is considered to be violent aggression directed against the self, have principal neurobiological links: preclinical and clinical evidence associates depression, aggression and suicidal behavior with dysregulation in central serotonergic (5-HT) neurotransmission. The implication of different types of 5-HT receptors in the genetic and epigenetic mechanisms of aggression, depression and suicidality has been well recognized. In this review, we consider and compare the orchestra of 5-HT receptors involved in these severe psychopathologies. Specifically, it concentrates on the role of 5-HT1A, 5-HT1B, 5-HT2A, 5-HT2B, 5-HT2C, 5-HT3 and 5-HT7 receptors in the mechanisms underlying the predisposition to aggression, depression and suicidal behavior. The review provides converging lines of evidence that: (1) depression-related 5-HT receptors include those receptors with pro-depressive properties (5-HT2A, 5-HT3 and 5-HT7) as well as those providing an antidepressant effect (5-HT1A, 5-HT1B, 5-HT2C subtypes). (2) Aggression-related 5-HT receptors are identical to depression-related 5-HT receptors with the exception of 5-HT7 receptors. Activation of 5-HT1A, 5-HT1B, 5-HT2A, 5-HT2C receptors attenuate aggressiveness, whereas agonists of 5-HT3 intensify aggressive behavior.
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Ambar Akkaoui M, Chan-Chee C, Laaidi K, Fifre G, Lejoyeux M, Vaiva G, Peyre H, Geoffroy PA. Seasonal changes and decrease of suicides and suicide attempts in France over the last 10 years. Sci Rep 2022; 12:8231. [PMID: 35581322 PMCID: PMC9114420 DOI: 10.1038/s41598-022-12215-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 04/26/2022] [Indexed: 11/09/2022] Open
Abstract
The objective of this study was to examine the evolution of suicides and suicide attempts over the last 10 years in France. We analyzed the number of deaths by suicide and suicide attempts in metropolitan France (2009-2018) from French national databases, on a daily, weekly or monthly basis. Seasonal variation in suicide rates was modeled using a cosinor function. Based on this model, we determined the association of suicides and suicide attempts with geographic characteristics, age, gender, means used and psychiatric disorders. The number of suicides and suicide attempts decreased over the last ten years in France (mean decrease of 14.49% and 11.69% per year). We observed a significant and recurrent seasonal pattern of suicides and suicide attempts in France, with a peak in spring. The suicide and suicide attempt rates were higher in the northern departments of France. Suicides were more frequent for men (75%) and middle-age individuals (45-54 years old), while suicide attempts were more frequent for women (62%) and young adults and middle-age individual (15-19 and 40-49 years old). Nearly two-thirds of the patients who attempted suicide suffered from comorbid psychiatric disorders. Mood disorders was the most frequent comorbid psychiatric disorder (54%). Voluntary drug intoxication was the most common means of suicide attempt (80%), and hanging was the most common means of suicide (54%). The number of suicides and suicide attempts decreased in France over the last 10 years, with large and recurrent seasonal variations. These findings could be used to alert and adjust prevention policies, as well as developing preventive strategies such as chronotherapeutics.
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Affiliation(s)
- Marine Ambar Akkaoui
- Département de Psychiatrie et d'addictologie, AP-HP, GHU Paris Nord, DMU Neurosciences, Hôpital Bichat - Claude Bernard, 75018, Paris, France.
- Centre Psychiatrique d'Orientation et d'Accueil (CPOA), Hôpital Sainte Anne, GHU Paris Psychiatrie & Neurosciences, 1 Rue Cabanis, 75014, Paris, France.
- Etablissement Publique de Santé Mentale de Ville Evrard, 202 Avenue Jean Jaurès, Neuilly Sur Marne, France.
| | - Christine Chan-Chee
- Santé Publique France, 12 Rue du Val d'Osne, 94415, Saint-Maurice Cedex, France
| | - Karine Laaidi
- Santé Publique France, 12 Rue du Val d'Osne, 94415, Saint-Maurice Cedex, France
| | - Gregory Fifre
- Météo-France, Direction des Services de la Météorologie, Avenue G. Coriolis, 31057, Toulouse, France
| | - Michel Lejoyeux
- Département de Psychiatrie et d'addictologie, AP-HP, GHU Paris Nord, DMU Neurosciences, Hôpital Bichat - Claude Bernard, 75018, Paris, France
- GHU Paris - Psychiatry & Neurosciences, 1 Rue Cabanis, 75014, Paris, France
| | - Guillaume Vaiva
- Univ Lille, INSERM U 1772, CHU Lille, General Psychiatry Department, Hôpital Fontan, 59037, Lille, France
- Centre National de Ressources et Résilience pour les Psychotraumatismes Cn2r Lille Paris, Lille, France
| | - Hugo Peyre
- Neurodiderot, INSERM UMR 1141, Paris Diderot University, Paris, France
- Department of Child and Adolescent Psychiatry, Robert Debré Hospital, APHP, Paris, France
| | - Pierre A Geoffroy
- Département de Psychiatrie et d'addictologie, AP-HP, GHU Paris Nord, DMU Neurosciences, Hôpital Bichat - Claude Bernard, 75018, Paris, France
- GHU Paris - Psychiatry & Neurosciences, 1 Rue Cabanis, 75014, Paris, France
- Université de Paris, NeuroDiderot, Inserm, 75019, Paris, France
- CNRS UPR 3212, Institute for Cellular and Integrative Neurosciences, 67000, Strasbourg, France
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Shen YS, Lung SCC, Cui S. Exploring multiple pathways and mediation effects of urban environmental factors for suicide prevention. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 294:118642. [PMID: 34883145 DOI: 10.1016/j.envpol.2021.118642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 11/27/2021] [Accepted: 12/03/2021] [Indexed: 06/13/2023]
Abstract
Public health is threatened by air pollution and high temperature, especially in urban areas and areas impacted by climate change. Well-designed urban forms have co-benefits on promoting human health and mediating atmospheric environment-related threats (e.g., high temperature and air pollution). Previous studies overlooked these mediating effects of urban form on suicide mortality. This study used partial least squares modeling and countywide data in Taiwan to identify the crucial influences and pathways of urban environment, socioeconomic status, and diseases on suicide mortality. The model considered the impact of the characteristics of urban form (i.e., urban development intensity, land mix, and urban sprawl), urban industrial status (i.e., industrial level), urban greening (i.e., green coverage), disease (i.e., important diseases morbidity of human immunodeficiency virus [HIV], cerebrovascular disease [CVD], chronic liver disease and cirrhosis [CLDC], nephritis, nephrotic syndrome and nephrosis [NNSN], malignant tumor [MT]), socioeconomic status (i.e., income level and aging population rate), and the atmospheric environment (i.e., air pollution and high temperature) on suicide mortality. Optimizing land mix and minimizing urban development intensity and urban sprawl have been found to reduce suicide mortality. The mediating effect of urban form on suicide mortality originated from air pollution and high temperature, and mediating air pollution was greater than high temperature. Furthermore, industrial level, important diseases (HIV, CVD, CLDC, NNSN, and MT) morbidity, an aging population rate, air pollution, and high temperature were associated with an increase in suicide mortality, whereas green coverage and income level were associated with a reduction in suicide rates. The findings demonstrate that appropriate urban policy and urban planning may lower suicide mortality, be useful strategies for suicide prevention, and be a foundation for building a healthy city. Moreover, this study provides clarity on the complex relationship of suicide and the urban environment while identifying crucial factors.
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Affiliation(s)
- Yu-Sheng Shen
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; Xiamen Key Lab of Urban Metabolism, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; University of Chinese Academy of Sciences, Beijing, China
| | - Shih-Chun Candice Lung
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; Department of Atmospheric Sciences, Taiwan University, Taipei, Taiwan; Institute of Environmental Health, Taiwan University, Taipei, Taiwan
| | - Shenghui Cui
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; Xiamen Key Lab of Urban Metabolism, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; University of Chinese Academy of Sciences, Beijing, China.
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6
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Yang P, Yang M, Li P, Cao D, Gong D, Lv J, Pu L, Huang S, Liang Y. A Meta-Analysis of 5-Hydroxytryptamine Receptor 1B Polymorphisms With Risk of Major Depressive Disorder and Suicidal Behavior. Front Psychiatry 2021; 12:696655. [PMID: 34322042 PMCID: PMC8311000 DOI: 10.3389/fpsyt.2021.696655] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 06/17/2021] [Indexed: 11/17/2022] Open
Abstract
Purpose: Previous association studies have investigated whether genetic polymorphisms in HTR1B influenced individuals' susceptibility to major depressive disorder (MDD), anti-depressant response (ADR) and suicidal behavior. However, equivocal evidence was obtained. In this meta-analysis, we aimed to examine the association of HTR1B polymorphisms with risk of MDD, ADR and suicidal behavior. Materials and Methods: Studies evaluating the association between HTR1B polymorphisms and risk of MDD, ADR and suicidal behavior were searched in Pubmed, Ovid Medline, web of science and China National Knowledge Infrastructure databases. Summary odds ratios (ORs), 95 % confidence intervals (CIs) and p-values were calculated using a fixed or random effects model. Results: Meta-analysis findings revealed a significantly increased risk of MDD with rs6296 GC and GC/CC genotypes (GC vs. GG: OR = 1.26, 95% CI, 1.07-1.48; GC/CC vs. GG: OR = 1.22, 95% CI, 1.04-1.43, respectively). Moreover, rs6298 CT genotype was significantly associated with an increased risk of suicidal behavior (CT vs. CC: OR = 1.48, 95% CI, 1.16-1.88). However, both rs6296 and rs130058 were not significant risk factors for lethal suicidal behavior. Conclusion: This meta-analysis identified that rs6296 and rs6298 in HTR1B may be significantly related to the risk of MDD and lethality of suicide attempts, respectively. Further studies are required to assess the markers in larger cohorts.
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Affiliation(s)
- Pingliang Yang
- Department of Anesthesiology, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Mengchang Yang
- Department of Anesthesiology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, China
| | - Peng Li
- Department of Anesthesiology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, China
| | - Dejun Cao
- Department of Anesthesia, Chengdu Second People's Hospital, Chengdu, China
| | - Daoyin Gong
- Department of Pathology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jiahua Lv
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China
| | - Linmei Pu
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China
| | - Sizhou Huang
- Development and Regeneration Key Laboratory of Sichuan Province, Department of Anatomy and Histology and Embryology, Chengdu Medical College, Chengdu, China
| | - Yundan Liang
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China
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Gareeva AE, Badretdinov UG, Akhmetova EA, Kinyasheva KO, Nasibullin TR, Samigullina LI, Timerbulatov IF, Timerbulatova MF, Asadullin AR. [The role of genetic factors in the development of suicidal behavior in individuals with dependence on synthetic cathinones]. Zh Nevrol Psikhiatr Im S S Korsakova 2020; 120:69-77. [PMID: 33244961 DOI: 10.17116/jnevro202012010169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To identify polymorphisms in the genes of dopaminergic and serotonergic systems associated with the risk of suicidal behavior in individuals with dependence on synthetic cathinones. MATERIAL AND METHODS One hundred and eighty-two men with the diagnosis of Substance dependence (ICD-10 F15) tested positive for metabolites of synthetic cathinones (a-PVP, MDPV) in the urine were studied. Genotyping was performed for rs1800497 DRD2, rs4646984 DRD4, VNTR 40 b.p. SLC6A3, rs27072 SLC6A3, rs6313 HTR2A and rs6296 HTR1B using PCR and RFLP technique. RESULTS AND CONCLUSION It was found that the genes of the serotonergic system HTR2A and HTR1B are predictors of the development of some endophenotypes of suicidal behavior in individuals with dependence on synthetic cathinones.
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Affiliation(s)
- A E Gareeva
- Bashkir State Medical University, Ufa, Russia.,Institute of Biochemistry and Genetics, the Russian Academy of Sciences, Ufa, Russia
| | | | | | - K O Kinyasheva
- Institute of Biochemistry and Genetics, the Russian Academy of Sciences, Ufa, Russia
| | - T R Nasibullin
- Institute of Biochemistry and Genetics, the Russian Academy of Sciences, Ufa, Russia
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Gao J, Cheng Q, Duan J, Xu Z, Bai L, Zhang Y, Zhang H, Wang S, Zhang Z, Su H. Ambient temperature, sunlight duration, and suicide: A systematic review and meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 646:1021-1029. [PMID: 30235587 DOI: 10.1016/j.scitotenv.2018.07.098] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 07/08/2018] [Accepted: 07/08/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The relationship between sunlight hours, temperature, and suicide has been investigated in many previous studies, but with inconsistent findings. We conducted this meta-analysis aiming at providing clear evidence about whether sunlight hours and temperature can affect the risk of suicide. METHODS Relevant literature published before 7 Jul 2018 was searched in three electronic database of PubMed, Web of science and Cochrane. Between-study heterogeneity in the effect estimates were examined by study design (i.e., exposure time resolution, temperature measure and suicide classification) and population vulnerability (i.e., sex, national income level, climate zone and study location). RESULTS Regarding temperature-suicide association, we identified 14 studies that provided 23 effect estimates for meta-analysis. Our random-effects model showed that each 1 °C increase in temperature was significantly associated with a 1% increase in the incidence of suicide (Incidence Rate Radio (IRR) = 1.01; 95%CI = 1.00-1.02; p < 0.05). As for sunlight duration and suicide, 11 effect estimates from 4 studies were pooled using a fixed-effects model. Significant association between sunlight duration (per 1 h increase) and the risk of suicide was not observed, and the pooled IRR was 1.00 (95%CI = 0.99-1.01; p > 0.05). There was significant heterogeneity between previous studies' effect estimates, and significantly lower heterogeneity was noted for the female group, for studies that did analyses at daily scale, and for studies using mean temperature as the exposure indicator. CONCLUSION Our findings suggest a significant and positive association between temperature rises and incidence of suicide, and a non-significant association between sunlight duration and incidence of suicide. Populations living in tropical and temperate zones or at middle-income level may be particularly vulnerable to temperature increase.
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Affiliation(s)
- Jiaojiao Gao
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Qiang Cheng
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Jun Duan
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Zihan Xu
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Lijun Bai
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Yanwu Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Heng Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Shusi Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Zhihua Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China
| | - Hong Su
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Province Key Laboratory of Major Autoimmune Disease, China.
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9
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Jones LJ, Norton WH. Using zebrafish to uncover the genetic and neural basis of aggression, a frequent comorbid symptom of psychiatric disorders. Behav Brain Res 2015; 276:171-80. [DOI: 10.1016/j.bbr.2014.05.055] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/23/2014] [Accepted: 05/26/2014] [Indexed: 12/31/2022]
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10
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Chen C, Liu C, Chen C, Moyzis R, Chen W, Dong Q. Genetic variations in the serotoninergic system and environmental factors contribute to aggressive behavior in Chinese adolescents. Physiol Behav 2014; 138:62-8. [PMID: 25447480 DOI: 10.1016/j.physbeh.2014.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 06/26/2014] [Accepted: 09/30/2014] [Indexed: 10/24/2022]
Abstract
Aggressive behavior is a major public health problem worldwide and has been associated with many gene variants, especially those related to the serotonin (5-hydroxytryptamine, 5-HT) system, and environmental factors. However, the overall contribution of serotonin-related genes to aggressive behavior is not well understood. With a sample of 478 healthy Chinese volunteers, this study investigated the relation between aggressive behavior and genetic variations of the serotoninergic system (as characterized by 129 representative polymorphisms) interacting with environmental factors (parental warmth and acceptance; stressful life events). We adopted a system-level approach to identify SNPs and environmental factors associated with aggressive behavior, and estimated their overall contribution to aggressive behavior using multiple regression, which was then verified by permutation analysis. We identified 12 SNPs that made statistically significant contributions to aggressive behavior. Next, main effects, interactions among these SNPs, and interactions between these SNPs and environmental factors were assessed using multiple regression. The final model accounted for approximately 19% of the variance for aggressive behavior. Permutation analysis confirmed that the probability of obtaining these findings by chance was low (p=0.045, permuted for 1000 times). These results showed that genetic variations in the serotoninergic system, combined with environmental risk factors, made a moderate contribution to individual differences in aggressive behavior among a healthy population sample.
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Affiliation(s)
- Chunhui Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China; Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, China
| | - Chang Liu
- Department of Psychology, The Pennsylvania State University, University Park, PA, USA
| | - Chuansheng Chen
- Department of Psychology and Social Behavior, University of California, Irvine, CA, USA
| | - Robert Moyzis
- Department of Biological Chemistry, University of California, Irvine, CA, USA; Institute of Genomics and Bioinformatics, University of California, Irvine, CA, USA
| | - Wen Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China; Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, China
| | - Qi Dong
- State Key Laboratory of Cognitive Neuroscience and Learning, IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China; Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing, China.
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Qi X, Hu W, Mengersen K, Tong S. Socio-environmental drivers and suicide in Australia: Bayesian spatial analysis. BMC Public Health 2014; 14:681. [PMID: 24993370 PMCID: PMC4226967 DOI: 10.1186/1471-2458-14-681] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 06/26/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The impact of socio-environmental factors on suicide has been examined in many studies. Few of them, however, have explored these associations from a spatial perspective, especially in assessing the association between meteorological factors and suicide. This study examined the association of meteorological and socio-demographic factors with suicide across small areas over different time periods. METHODS Suicide, population and socio-demographic data (e.g., population of Aboriginal and Torres Strait Islanders (ATSI), and unemployment rate (UNE) at the Local Government Area (LGA) level were obtained from the Australian Bureau of Statistics for the period of 1986 to 2005. Information on meteorological factors (rainfall, temperature and humidity) was supplied by Australian Bureau of Meteorology. A Bayesian Conditional Autoregressive (CAR) Model was applied to explore the association of socio-demographic and meteorological factors with suicide across LGAs. RESULTS In Model I (socio-demographic factors), proportion of ATSI and UNE were positively associated with suicide from 1996 to 2000 (Relative Risk (RR)ATSI = 1.0107, 95% Credible Interval (CI): 1.0062-1.0151; RRUNE = 1.0187, 95% CI: 1.0060-1.0315), and from 2001 to 2005 (RRATSI = 1.0126, 95% CI: 1.0076-1.0176; RRUNE = 1.0198, 95% CI: 1.0041-1.0354). Socio-Economic Index for Area (SEIFA) and IND, however, had negative associations with suicide between 1986 and 1990 (RRSEIFA = 0.9983, 95% CI: 0.9971-0.9995; RRATSI = 0.9914, 95% CI: 0.9848-0.9980). Model II (meteorological factors): a 1°C higher yearly mean temperature across LGAs increased the suicide rate by an average by 2.27% (95% CI: 0.73%, 3.82%) in 1996-2000, and 3.24% (95% CI: 1.26%, 5.21%) in 2001-2005. The associations between socio-demographic factors and suicide in Model III (socio-demographic and meteorological factors) were similar to those in Model I; but, there is no substantive association between climate and suicide in Model III. CONCLUSIONS Proportion of Aboriginal and Torres Strait Islanders, unemployment and temperature appeared to be statistically associated with of suicide incidence across LGAs among all selected variables, especially in recent years. The results indicated that socio-demographic factors played more important roles than meteorological factors in the spatial pattern of suicide incidence.
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Affiliation(s)
- Xin Qi
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, China.
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12
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Serotonergic genes and suicide: a systematic review. Eur Neuropsychopharmacol 2013; 23:1125-42. [PMID: 23742855 DOI: 10.1016/j.euroneuro.2013.03.013] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 02/12/2013] [Accepted: 03/24/2013] [Indexed: 12/12/2022]
Abstract
Suicide is one of the leading causes of death in the world. Its aetiology is complex and diverse, however, epidemiological studies show that suicidal behavior is partly heritable. Neurobiological evidence implicates serotonergic dysfunction in suicidality, stimulating genetic research to focus on genes related to the serotonergic system. In this paper, we review evidence from studies examining the association between various serotonergic genes (Tryptophan Hydroxylase genes: TPH1; TPH2, Serotonin Transporter gene: 5-HTTLPR in SLC6A4, Serotonin Receptor genes: HTR1A, HTR2A, HTR1B, HTR2C and Monoamine Oxidase A gene: MAOA) and suicidal behavior. The data show associations between variation on the TPH1 gene and 5-HTTLPR gene and violent suicidal behavior in Caucasian populations, with the least inconsistencies. Results are mixed for the TPH2 gene and serotonin receptor genes, but for some genes, studies that include haplotypic analyses or that examine a larger coding region of the genes tend to provide more reliable results. Findings on endophenotypes of suicidality, such as aggression and impulsivity traits, show positive associations for the TPH1, HTR2A, and MAOA genes, but need further replication, since negative associations are also occasionally reported. Since genes can only partially explain suicidal risk, several studies during the past decade have tried to incorporate environmental factors in the susceptibility model. Studies to date show that variation on the 5-HTTLPR, MAOA and HTR2A gene can interact with stressful life events to increase risk for suicidal behavior. Limitations of case-control studies are discussed and future considerations are put forward with regard to endophenotypic measurements and gene-environment interactions.
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13
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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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14
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Furczyk K, Schutová B, Michel TM, Thome J, Büttner A. The neurobiology of suicide - A Review of post-mortem studies. J Mol Psychiatry 2013; 1:2. [PMID: 25408895 PMCID: PMC4223890 DOI: 10.1186/2049-9256-1-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 02/15/2013] [Indexed: 01/15/2023] Open
Abstract
The neurobiology of suicidal behaviour, which constitutes one of the most serious problems both in psychiatry and general medical practice, still remains to a large degree unclear. As a result, scientists constantly look for new opportunities of explaining the causes underlying suicidality. In order to elucidate the biological changes occurring in the brains of the suicide victims, studies based on post-mortem brain tissue samples are increasingly being used. These studies employ different research methods to provide an insight into abnormalities in brain functioning on various levels, including gene and protein expression, neuroplasticity and neurotransmission, as well as many other areas. The aim of this paper to summarize the available data on the post-mortem studies, to provide an overview of main research directions and the most up-to-date findings, and to indicate the possibilities of further research in this field.
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Affiliation(s)
- Karolina Furczyk
- Department of Psychiatry, University of Rostock, Gehlsheimerstrasse 20, 18147 Rostock, Germany
| | - Barbora Schutová
- Department of Psychiatry, University of Rostock, Gehlsheimerstrasse 20, 18147 Rostock, Germany
| | - Tanja M Michel
- Department of Psychiatry, University of Rostock, Gehlsheimerstrasse 20, 18147 Rostock, Germany
| | - Johannes Thome
- Department of Psychiatry, University of Rostock, Gehlsheimerstrasse 20, 18147 Rostock, Germany ; College of Medicine, Swansea University, Singleton Park, Swansea, SA2 PP UK
| | - Andreas Büttner
- Institute of Forensic Medicine, University of Rostock, St.-Georg-Strasse 108, 18055 Rostock, Germany
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15
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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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Sadkowski M, Dennis B, Clayden RC, Elsheikh W, Rangarajan S, Dejesus J, Samaan Z. The role of the serotonergic system in suicidal behavior. Neuropsychiatr Dis Treat 2013; 9:1699-716. [PMID: 24235834 PMCID: PMC3825712 DOI: 10.2147/ndt.s50300] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Serotonin is a widely investigated neurotransmitter in several psychopathologies, including suicidal behavior (SB); however, its role extends to several physiological functions involving the nervous system, as well as the gastrointestinal and cardiovascular systems. This review summarizes recent research into ten serotonergic genes related to SB. These genes - TPH1, TPH2, SLC6A4, SLC18A2, HTR1A, HTR1B, HTR2A, DDC, MAOA, and MAOB - encode proteins that are vital to serotonergic function: tryptophan hydroxylase; the serotonin transporter 5-HTT; the vesicular transporter VMAT2; the HTR1A, HTR1B, and HTR2A receptors; the L-amino acid decarboxylase; and the monoamine oxidases. This review employed a systematic search strategy and a narrative research methodology to disseminate the current literature investigating the link between SB and serotonin.
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Affiliation(s)
- Marta Sadkowski
- Arts and Sciences Program, McMaster University, Hamilton, ON, Canada
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17
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Müller H, Biermann T, Renk S, Reulbach U, Ströbel A, Kornhuber J, Sperling W. Higher Environmental Temperature and Global Radiation Are Correlated With Increasing Suicidality—A Localized Data Analysis. Chronobiol Int 2011; 28:949-57. [DOI: 10.3109/07420528.2011.618418] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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18
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Pavlov KA, Chistiakov DA, Chekhonin VP. Genetic determinants of aggression and impulsivity in humans. J Appl Genet 2011; 53:61-82. [PMID: 21994088 DOI: 10.1007/s13353-011-0069-6] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Revised: 09/24/2011] [Accepted: 09/26/2011] [Indexed: 12/13/2022]
Abstract
Human aggression/impulsivity-related traits have a complex background that is greatly influenced by genetic and non-genetic factors. The relationship between aggression and anxiety is regulated by highly conserved brain regions including amygdala, which controls neural circuits triggering defensive, aggressive, or avoidant behavioral models. The dysfunction of neural circuits responsible for emotional control was shown to represent an etiological factor of violent behavior. In addition to the amygdala, these circuits also involve the anterior cingulated cortex and regions of the prefrontal cortex. Excessive reactivity in the amygdala coupled with inadequate prefrontal regulation serves to increase the likelihood of aggressive behavior. Developmental alterations in prefrontal-subcortical circuitry as well as neuromodulatory and hormonal abnormality appear to play a role. Imbalance in testosterone/serotonin and testosterone/cortisol ratios (e.g., increased testosterone levels and reduced cortisol levels) increases the propensity toward aggression because of reduced activation of the neural circuitry of impulse control and self-regulation. Serotonin facilitates prefrontal inhibition, and thus insufficient serotonergic activity can enhance aggression. Genetic predisposition to aggression appears to be deeply affected by the polymorphic genetic variants of the serotoninergic system that influences serotonin levels in the central and peripheral nervous system, biological effects of this hormone, and rate of serotonin production, synaptic release and degradation. Among these variants, functional polymorphisms in the monoamine oxidase A (MAOA) and serotonin transporter (5-HTT) may be of particular importance due to the relationship between these polymorphic variants and anatomical changes in the limbic system of aggressive people. Furthermore, functional variants of MAOA and 5-HTT are capable of mediating the influence of environmental factors on aggression-related traits. In this review, we consider genetic determinants of human aggression, with special emphasis on genes involved in serotonin and dopamine metabolism and function.
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Affiliation(s)
- Konstantin A Pavlov
- Department of Fundamental and Applied Neurobiology, Serbsky State Research Center of Forensic and Social Psychiatry, Kropotkinsky Pereulok 23, Moscow, Russia
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19
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Stefulj J, Bordukalo-Niksic T, Hecimovic H, Demarin V, Jernej B. Epilepsy and serotonin (5HT): variations of 5HT-related genes in temporal lobe epilepsy. Neurosci Lett 2010; 478:29-31. [PMID: 20435093 DOI: 10.1016/j.neulet.2010.04.060] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Revised: 04/22/2010] [Accepted: 04/25/2010] [Indexed: 01/12/2023]
Abstract
Several lines of evidence point to the role of serotonin (5HT) neurotransmission in the epileptogenesis. The present preliminary study investigated possible association of the temporal lobe epilepsy (TLE) with the polymorphisms in several 5HT-related genes, including serotonin transporter (5HTT), monoamine oxidase A (MAO-A) and serotonin receptors 5HT-1A, 5HT-1B and 5HT-2C. All participants (101 TLE patients and 170 healthy controls) were unrelated individuals of Croatian origin. 5HT-1B allele 861G was found to be slightly overrepresented in the patient group (p=0.0385). No significant differences between groups were observed for the other tested polymorphisms. Within the limitations imposed by the size of our sample, negative findings suggest that the respective loci do not make considerable contribution to the etiopathogenesis of TLE. Further examination of 5HT-1B gene, which yielded positive result at a trend level, is possibly warranted.
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Affiliation(s)
- Jasminka Stefulj
- Laboratory of Neurochemistry and Molecular Neurobiology, Department of Molecular Biology, Rudjer Boskovic Institute, Bijenicka cesta 54, HR-10000 Zagreb, Croatia
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20
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Neuronal tryptophan hydroxylase (TPH2) in suicidal behaviour. Transl Neurosci 2010. [DOI: 10.2478/v10134-010-0031-x] [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
AbstractSerotonin (5-hydroxytryptamine, 5-HT) is a signalling molecule involved in many brain functions as well as in a variety of psychiatric conditions, including suicidal behaviour. Tryptophan hydroxylase (TPH), the rate-limiting enzyme of 5-HT biosynthesis, plays a critical role in 5-HT metabolism and thus in the regulation of 5-HT neurotransmission. There are two isoforms of TPH, so-called peripheral (TPH1) and neuronal (TPH2), encoded by the two distinct genes. TPH1 is abundant in the peripheral tissues, while TPH2 was detected exclusively within the nervous system. Since its discovery in 2003, TPH2 gene has attracted great interest as a potential factor contributing to diathesis of suicidal behaviour. However, initial positive findings indicating an association of TPH2 genetic variants with suicide have not been replicated consistently. Here we provide an overview of published studies to date, that have evaluated the contribution of TPH2 gene to the etiopathogenesis of suicidal behaviour.
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21
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HTR1B as a risk profile maker in psychiatric disorders: a review through motivation and memory. Eur J Clin Pharmacol 2009; 66:5-27. [DOI: 10.1007/s00228-009-0724-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Accepted: 08/18/2009] [Indexed: 12/21/2022]
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22
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23
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Abstract
Suicidal behavior is partly heritable. Studies seeking the responsible candidate genes have examined genes involved in neurotransmitter systems shown to have altered function in suicide and attempted suicide. These neurotransmitter systems include the serotonergic, noradrenergic, and dopaminergic systems and the hypothalamic-pituitary-adrenal axis. With some exceptions, most notably the serotonin transporter gene promoter polymorphism (HTTLPR), replication of candidate gene association studies findings has been difficult. This article reviews current knowledge of specific gene effects and gene-environment interactions that influence risk for suicidal behavior. Effects of childhood stress on development and how it influences adult responses to current stress are shown to be relevant for mood disorders, aggressive/impulsive traits, and suicidal behavior.
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Affiliation(s)
- Dianne Currier
- Division of Molecular Imaging and Neuropathology, Department of Psychiatry, Columbia University, 1051 Riverside Drive, NYSPI Unit #42, New York, NY 10032, USA.
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24
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De Luca V, Strauss J, Kennedy JL. Power based association analysis (PBAT) of serotonergic and noradrenergic polymorphisms in bipolar patients with suicidal behaviour. Prog Neuropsychopharmacol Biol Psychiatry 2008; 32:197-203. [PMID: 17869399 DOI: 10.1016/j.pnpbp.2007.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2007] [Revised: 08/02/2007] [Accepted: 08/02/2007] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND AIMS Suicidality is a major health concern worldwide particularly in affective disorder patients. Attempted suicide is familial. There is strong neurobiological evidence showing that serotonergic and noradrenergic dysfunction is implicated in suicidal behaviours. We will apply now a new family based association strategy aimed to explain the genetic influence in suicidal behaviour by power based association test statistics (PBAT) in 336 bipolar patients assessed for suicidality within nuclear families. METHODS By use of conditional power calculations, the approach screens all possible null hypotheses without biasing the nominal significance level, and it identifies the subset of phenotypes that has optimal power when tested for association by either univariate or multivariate family based association test (FBAT). Using this statistical approach (PBAT) we investigated polymorphisms in serotonergic and noradrenergic genes, considering suicidal behaviour severity instead of the dichotomous phenotype (presence of suicide attempt). RESULTS COMT Val/Met polymorphism was not associated with suicide with high confidence (power=91%). On the other hand, the analysis of the other 12 markers in the adrenergic and serotonergic genes revealed that the TH allele tended towards association with higher severity of suicidal behaviour (p=0.060) but the power obtained was very low. CONCLUSIONS The marginal finding of association between TH and severe suicidal behaviour are convergent with previous reports. On the other hand, our sample has enough power to exclude the other polymorphisms investigated as major candidate for suicidality in bipolar disorder.
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Affiliation(s)
- Vincenzo De Luca
- Centre for Addiction and Mental Health, Department of Psychiatry, University of Toronto, ON, Canada.
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25
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Zouk H, McGirr A, Lebel V, Benkelfat C, Rouleau G, Turecki G. The effect of genetic variation of the serotonin 1B receptor gene on impulsive aggressive behavior and suicide. Am J Med Genet B Neuropsychiatr Genet 2007; 144B:996-1002. [PMID: 17510950 DOI: 10.1002/ajmg.b.30521] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Impulsive-aggressive behaviors (IABs) are regarded as possible suicide intermediate phenotypes, mediating the relationship between genes and suicide outcome. In this study, we aimed to investigate the putative relationship between genetic variation at the 5-HT1B receptor gene, which in animal models is involved in impulse-aggression control, IABs, and suicide risk. We investigated the relationship of variation at five 5-HT1B loci and IAB measures in a sample of 696 subjects, including 338 individuals who died by suicide and 358 normal epidemiological controls. We found that variation at the 5-HT1B promoter A-161T locus had a significant effect on levels of IABs, as measured by the Buss-Durkee Hostility Inventory (BDHI). Suicides also differed from controls in distribution of variants at this locus. The A-161T locus, which seems to impact 5-HT1B transcription, could play a role in suicide predisposition by means of mediating impulsive-aggressive behaviors.
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Affiliation(s)
- Hana Zouk
- McGill Group for Suicide Studies, Douglas Hospital Research Center, McGill University, Montreal, Canada
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26
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Marziniak M, Mössner R, Kienzler C, Riederer P, Lesch KP, Sommer C. Functional polymorphisms of the 5-HT1A and 5-HT1B receptor are associated with clinical symptoms in migraineurs. J Neural Transm (Vienna) 2007; 114:1227-32. [PMID: 17417740 DOI: 10.1007/s00702-007-0713-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2005] [Accepted: 03/03/2007] [Indexed: 10/23/2022]
Abstract
Migraine is regarded as a polygenic disease and serotonergic pathways appear to play a major role in its pathogenesis. In the present study, the role of the 5-HT1A and 5-HT1B receptors in migraine was evaluated. The human 5-HT1A receptor gene transcription is modulated by a functional C-1019G promoter polymorphism. The 5-HT1B receptor is the main effector of vasoconstriction in meningeal and cerebral arteries and its functional G861C promoter polymorphism was investigated. We report a positive association of the GG genotype of the 5-HT1A promoter polymorphism with avoidance of physical activity during a migraine attack in comparison to the CC genotype (p = 0.008). Moreover, a positive association of the CC genotype of the G861C polymorphism of the 5-HT1B receptor with the reported intensity of the headache attack on the visual analogue scale was observed (CC 8.3 +/- 1.5 vs. GG 6.9 +/- 1.8; p < 0.05). An association of either polymorphism with migraine with or without aura could not be found. For the first time, our results indicate a role of allelic variation of the 5-HT1A receptor in motion related discomfort in migraineurs and a role of the 5-HT1B receptor polymorphism in headache intensity.
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Affiliation(s)
- M Marziniak
- Department of Neurology, University of Würzburg, Würzburg, Germany.
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27
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Rujescu D, Thalmeier A, Möller HJ, Bronisch T, Giegling I. Molecular genetic findings in suicidal behavior: what is beyond the serotonergic system? Arch Suicide Res 2007; 11:17-40. [PMID: 17178640 DOI: 10.1080/13811110600897317] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Various studies provide consistent evidence for a genetic component in suicidal behavior. First molecular genetic studies concentrated on genes of the serotonergic system based on the biochemical evidence that serotonergic neurotransmission is implicated in this behavior. Furthermore, genes of the dopaminergic and noradrenergic neurotransmitter systems have also been the subjects of investigations in this context. Some epidemical and clinical studies showed that low serum cholesterol levels are associated with suicidal behavior and genes involved in these pathways have been investigated. Microarray experiments provide the possibility of genome-wide gene expression analysis and help to investigate associated molecular mechanisms. The aim of this article is to review molecular genetic studies in suicidal behavior and to emphasize findings on new genes.
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Affiliation(s)
- Dan Rujescu
- Department of Psychiatry, Ludwig-Maximilians University, Munich, Germany.
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Videtic A, Pungercic G, Pajnic IZ, Zupanc T, Balazic J, Tomori M, Komel R. Association study of seven polymorphisms in four serotonin receptor genes on suicide victims. Am J Med Genet B Neuropsychiatr Genet 2006; 141B:669-72. [PMID: 16856120 DOI: 10.1002/ajmg.b.30390] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A number of molecular genetic studies have investigated if serotonin (5-HT) receptor subtypes are involved in the pathogenesis of depression, suicidal behavior, aggression, and impulsive behavior. Existence of many receptor subtypes for a single transmitter permits a great diversity of signaling raising the possibility that they may serve as genetic markers for suicidal behavior. Most previous studies of suicide have analyzed polymorphisms of the receptors 5-HT1A, 5-HT1B, 5-HT2A, fewer have examined 5-HT1F. We report a study of possible association between the polymorphisms in the 5-HT receptor genes (1A, 1B, 1F, and 2A) and suicidal behavior on a sample of 226 suicide victims and 225 healthy control subjects. No significant differences in genotype frequency distributions between the suicide victims and healthy control subjects were observed for four polymorphisms; three were not polymorphic. A single polymorphism, C-1420T in gene 5-HT2A, showed a slight association with suicide (chi2= 4.94, df = 2, P = 0.067), but the correlation was not statistically significant. None of the tested genetic variants of serotonin receptors appears to be associated with suicidal behavior in the Slovenian population which has a relatively high suicide rate.
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Affiliation(s)
- Alja Videtic
- Institute of Biochemistry, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
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Abstract
The concept that genetic factors contribute to the complex trait of suicidal behaviour has stimulated much work aimed at identifying susceptibility genes. So far molecular genetic studies focused on the serotonergic pathway as the intent to die and the lethality of suicide acts were related to the serotonergic system. Two genes have so far emerged as being involved in the vulnerability for suicidality: first, the intronic polymorphisms (A218C or A779C) of the tryptophan hydroxylase 1 (TPH1) gene, which was suggested as a quantitative risk factor for suicidal behaviour; second, the insertion/deletion polymorphism of the serotonin transporter gene (5-HTTLPR), which does not seem to be involved in general suicidal behaviour, but in violent and repeated suicide attempts. The data have further shown that the MAOA gene, which is consistently associated with impulsive-aggressive personality traits, is not related to suicide but might induce violent methods in subjects with other suicide risk factors. Predominantly negative were the findings with any type of the serotonin receptors and inconsistent with catecholamine-synthesizing and -metabolizing enzymes or with the dopaminergic receptors. This paper reviews the status of current knowledge in this area, points to the weakness of the investigations and presents new approaches beyond the serotonergic system.
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Affiliation(s)
- B Bondy
- Section Psychiatric Genetics and Neurochemistry, Psychiatric Clinic, Ludwig-Maximilians-University, Munich, Germany.
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30
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Proudnikov D, LaForge KS, Hofflich H, Levenstien M, Gordon D, Barral S, Ott J, Kreek MJ. Association analysis of polymorphisms in serotonin 1B receptor (HTR1B) gene with heroin addiction: a comparison of molecular and statistically estimated haplotypes. Pharmacogenet Genomics 2006; 16:25-36. [PMID: 16344719 DOI: 10.1097/01.fpc.0000182782.87932.d6] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES 5-Hydroxytryptamine (serotonin)-1B receptors (HTR1B) may play an important role in psychiatric disorders and drug and alcohol dependence. In this study we report on genotype, molecular haplotype and statistically estimated haplotype analyses of previously identified polymorphisms in positions -261T>G, -161A>T, 129C>T, 861G>C and 1180A>G of the HTR1B gene in ethnically diverse populations (African-Americans, Caucasians, Hispanics and Asians) including 235 former heroin addicts and 161 control subjects from New York City. The objectives were to test for an association of molecular and statistically estimated haplotypes and genotypes in HTR1B gene with heroin addiction and to compare results provided by molecular and statistically estimated haplotyping methods. METHODS Genotype analysis was performed using a standard TaqMan protocol. Molecular haplotype analysis of the subset of polymorphisms consisting of -261T>G, -161A>T and 129C>T was performed using a protocol specially designed by our group, using fluorescent PCR. This is based on use of allele-specific primers complementary to flanking polymorphisms and a fluorescently labeled sequence-specific TaqMan probe set complementary to an internal polymorphism of the haplotype region. Every individual's statistically inferred haplotype pair agreed with the individual's haplotype pair determined by molecular haplotyping. RESULTS AND CONCLUSION A point-wise significant association of haplotype pairs containing allele G at position 1180 with protective effect from heroin addiction in Caucasians was found. A point-wise nominally significant association of allele 1180G with a protective effect from heroin addiction was found in Caucasians. Statistically significant differences across four ethnic groups in control subjects for allelic frequencies of -261T>G and -161A>T were found.
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Affiliation(s)
- Dmitri Proudnikov
- Laboratory of the Biology of Addictive Diseases, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.
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Mann JJ, Currier D. Effects of genes and stress on the neurobiology of depression. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2006; 73:153-89. [PMID: 16737904 DOI: 10.1016/s0074-7742(06)73005-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- J John Mann
- Department of Psychiatry, Division of Neuroscience, Columbia University, New York, New York 10032, USA
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Olivier B, van Oorschot R. 5-HT1B receptors and aggression: A review. Eur J Pharmacol 2005; 526:207-17. [PMID: 16310769 DOI: 10.1016/j.ejphar.2005.09.066] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2005] [Accepted: 09/23/2005] [Indexed: 01/19/2023]
Abstract
The serotonergic (5-HT) system in the brain is involved in the modulation of offensive aggressive behavior. The dogma that activity of the 5-HT system is inversely related to aggression is obsolete now. Research on the status of the 5-HT system before, during and after the execution of aggression is ongoing but has not yet led to a clear picture about the actual functional role of the 5-HT system, the more because state versus trait aggression seems to play a pivotal role in the outcome. Pharmacological challenges pinpoint 5-HT(1A) and 5-HT(1B) receptors as key players in the modulation of offensive aggression. This review emphasizes in particular the role of postsynaptic 5-HT(1B) (hetero) receptors as a premier site to modulate offensive aggression. Modulation of the firing and 5-HT release of the serotonergic neuron, via presynaptic 5-HT(1A) (auto) receptors, presynaptic 5-HT(1B) (auto) receptors and serotonergic transporters, may also have striking influences on aggression under certain conditions. Therefore, it is hypothesized that postsynaptic 5-HT(1B) (hetero) receptors directly influence the executive, consummatory phases of agonistic behavior, whereas presynaptic serotonergic feedback systems are particularly useful in the introductory (appetitive) phases of the agonistic behavioral complex.
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Affiliation(s)
- Berend Olivier
- Department of Psychopharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Sorbonnelaan 16, The Netherlands.
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