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Yu X, Eid Y, Jama M, Pham D, Ahmed M, Attar MS, Samiuddin Z, Barakat K. Combining machine learning, molecular dynamics, and free energy analysis for (5HT)-2A receptor modulator classification. J Mol Graph Model 2024; 132:108842. [PMID: 39151376 DOI: 10.1016/j.jmgm.2024.108842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 07/03/2024] [Accepted: 08/02/2024] [Indexed: 08/19/2024]
Abstract
The 5-Hydroxytryptamine (5HT)-2A receptor, a key target in psychoactive drug development, presents significant challenges in the design of selective compounds. Here, we describe the construction, evaluation and validation of two machine learning (ML) models for the classification of bioactivity mechanisms against the (5HT)-2A receptor. Employing neural networks and XGBoost models, we achieved an overall accuracy of around 87 %, which was further enhanced through molecular modelling (MM) (e.g. molecular dynamics simulations) and binding free energy analysis. This ML-MM integration provided insights into the mechanisms of direct modulators and prodrugs. A significant outcome of the current study is the development of a 'binding free energy fingerprint' specific to (5HT)-2A modulators, offering a novel metric for evaluating drug efficacy against this target. Our study demonstrates the prospective of employing a successful workflow combining AI with structural biology, offering a powerful tool for advancing psychoactive drug discovery.
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Affiliation(s)
- Xian Yu
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Yasmine Eid
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Maryam Jama
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Diane Pham
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Marawan Ahmed
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Melika Shabani Attar
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Zainab Samiuddin
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Khaled Barakat
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB, Canada.
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Drago A. Genetic signatures of suicide attempt behavior: insights and applications. Expert Rev Proteomics 2024; 21:41-53. [PMID: 38315076 DOI: 10.1080/14789450.2024.2314143] [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: 09/21/2023] [Accepted: 01/22/2024] [Indexed: 02/07/2024]
Abstract
INTRODUCTION Every year about 800,000 complete suicide events occur. The identification of biologic markers to identify subjects at risk would be helpful in targeting specific support treatments. AREA COVERED A narrative review defines the meta-analytic level of current evidence about the biologic markers of suicide behavior (SB). The meta-analytic evidence gathered so far indicates that the hypothesis-driven research largely failed to identify the biologic markers of suicide. The most consistent and replicated result was reported for: 1) 5-HTR2A T102C, associated with SB in patients with schizophrenia (OR = 1.73 (1.11-2.69)) and 2) BDNF Val66Met (rs6265), with the Met-Val + Val-Val carriers found to be at risk for suicide in the Caucasian population (OR: 1.96 (1.58-2.43)), while Val-Val vs. Val-Met + Met carriers found to be at risk for suicide in the Asian populations (OR: 1.36 (1.04-1.78)). GWAS-based meta-analyses indicate some positive replicated findings regarding the DRD2, Neuroligin gene, estrogen-related genes, and genes involved in gene expression. EXPERT OPINION Most consistent results were obtained when analyzing sub-samples of patients. Some promising results come from the implementation of the polygenic risk score. There is no current consensus about an implementable biomarker for SB.
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Affiliation(s)
- Antonio Drago
- Department of Clinical Medicine, Aalborg University Hospital, Aalborg, Denmark
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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: 20] [Impact Index Per Article: 10.0] [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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Suicide and Changes in Expression of Neuronal miRNA Predicted by an Algorithm Search through miRNA Databases. Genes (Basel) 2022; 13:genes13040562. [PMID: 35456368 PMCID: PMC9025835 DOI: 10.3390/genes13040562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/19/2022] [Accepted: 03/21/2022] [Indexed: 12/31/2022] Open
Abstract
Suicide is multifactorial and polygenic phenotype, affected by environmental and genetic factors. Among epigenetic mechanisms, miRNAs have been studied, but so far no very concise results exist. To overcome limitations of candidate miRNA and whole genome sequencing approaches, we created an in silico analysis algorithm that would help select the best suitable miRNAs that target the most interesting genes associated with suicidality. We used databases/web algorithms DIANA microT, miRDB, miRmap, miRWalk, and TargetScan and candidate genes SLC6A4, HTR1A, BDNF, NR3C1, ZNF714, and NRIP3. Based on a prediction algorithm, we have chosen miRNAs that are targeting regulation of the genes listed, and are at the same time being expressed in the brain. The highest ranking scores were obtained for hsa-miR-4516, hsa-miR-3135b, hsa-miR-124-3p, hsa-miR-129-5p, hsa-miR-27b-3p, hsa-miR-381-3p, hsa-miR-4286. Expression of these miRNAs was tested in the brain tissue of 40 suicide completers and controls, and hsa-miR-4516 and hsa-miR-381-3p showed a trend for statistical significance. We also checked the expression of the target genes of these miRNAs, and for NR3C1 expression was lower in suicide completers compared to controls, which is in accordance with the available literature results. To determine the miRNAs that are most suitable for further suicidality research, more studies, combining in silico analysis and wet lab experiments, should be performed.
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Wang Y, Joseph J, Gao Y, Hu B, Geng X, Wu D, Wang J, Zhang F. Revealing the interaction modes of 5-HT2A receptor antagonists and the Structure-Based virtual screening from FDA and TCMNP database. J Biomol Struct Dyn 2020; 39:3681-3692. [PMID: 32406337 DOI: 10.1080/07391102.2020.1768900] [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: 10/24/2022]
Abstract
5-hydroxytryptamine 2A (5-HT2A) receptor is emerging as an important target for numerous psychoactive drugs due to its imperative roles in psychological diseases. In fact, multiple 5-HT2A receptor antagonists were developed to treat numerous psychiatric disorders, however, their clinical outcome was far from ideal probably due to a blurry information of the exact interaction modes between the receptor and its antagonists. Impressively, with a recent release of its crystal structure, we carefully analyzed the receptor-ligand interactions with Protein Contacts Atlas, structure-based pharmacophore models, and molecular dynamics (MD) simulations to sum up the chemical features for antagonists interacting with 5-HT2A receptor. Moreover, the molecular docking-based virtual screening was applied to discover potential 5-HT2A receptor antagonists from FDA and TCMNP databases. Intriguingly, after a systematic assessment of the docking scores, binding modes and free energies, as well as their MD simulations performances, three compounds in TCMNP database were highlighted to be potential 5-HT2A receptor antagonists. Fascinatedly, these three hits also exhibited highly binding affinities with dopamine D2 receptor (D2R) due to the similarity of the ligand binding pockets of the receptors, indicating them to be promising dual target molecules that are of great benefit for anti-psychotic-drug research and development. In addition, ADME/Tox predictions were conducted for a primary evaluation of their developing potential. Together, this study not only revealed the exact interaction modes between 5-HT2A receptor and its antagonists, which shed a light on a better access for developing its novel antagonists, but also provided promising dual D2 and 5-HT2A receptor antagonists.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Ying Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Johnson Joseph
- Key Laboratory of Structure-Based Drug Design &Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Yinli Gao
- Key Laboratory of Structure-Based Drug Design &Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Baichun Hu
- Key Laboratory of Structure-Based Drug Design &Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Xiaohui Geng
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Di Wu
- Key Laboratory of Structure-Based Drug Design &Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, People's Republic of China.,School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Jian Wang
- Key Laboratory of Structure-Based Drug Design &Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Fengjiao Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
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Liu BP, Wang XT, Liu ZZ, Wang ZY, Liu X, Jia CX. Stressful life events, insomnia and suicidality in a large sample of Chinese adolescents. J Affect Disord 2019; 249:404-409. [PMID: 30822663 DOI: 10.1016/j.jad.2019.02.047] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/12/2019] [Accepted: 02/17/2019] [Indexed: 12/12/2022]
Abstract
AIMS This study aimed to examine the associations between stressful life events, insomnia, and suicidality including suicidal ideation (SI), suicide plan (SP) and suicide attempt (SA) in a large sample of Chinese adolescents. METHODS A total of 11,831 adolescents who participated in the baseline survey of Shandong Adolescent Behavior and Health Cohort were included for the analysis. Participants were sampled from 8 middle/high schools in 3 counties of Shandong, China. Participants completed a structured behavior and health questionnaire, including suicidality, demographics, depression/anxiety, stressful life events (SLEs), and insomnia in November-December 2015. A series of logistic regression models and mediation analyses were performed to examine the associations between SLEs, insomnia and suicidality. RESULTS The prevalence rates of overall suicidality, SI, SP and SA in the last year were 13.1%, 12.5%, 3.3%, and 1.5%, respectively. SLEs were significantly associated with overall suicidality, SI, and SP. Insomnia was an independent risk factor of suicidality and a mediator of the association between SLEs and suicidality. The total effect of SLEs on overall suicidality was 0.597 (95%CI: 0.534-0.661), including 0.457 (95%CI: 0.391-0.523) for direct effect and 0.158 (95%CI: 0.138-0.178) for indirect effect. Insomnia also mediated the associations of SLEs with SI, SP and SA, respectively. LIMITATIONS Causal relationship could not be concluded because this study is cross-sectional. CONCLUSIONS Stressful life events and insomnia are directly associated with suicidality in adolescents. The association between SLEs and suicidality is partially mediated by insomnia.
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Affiliation(s)
- Bao-Peng Liu
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; Shandong University Center for Suicide Prevention and Research, No.44, Wenhuaxi Rd, Lixia Dist, Jinan 250012, China
| | - Xin-Ting Wang
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; Shandong University Center for Suicide Prevention and Research, No.44, Wenhuaxi Rd, Lixia Dist, Jinan 250012, China
| | - Zhen-Zhen Liu
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; Shandong University Center for Suicide Prevention and Research, No.44, Wenhuaxi Rd, Lixia Dist, Jinan 250012, China
| | - Ze-Ying Wang
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; Shandong University Center for Suicide Prevention and Research, No.44, Wenhuaxi Rd, Lixia Dist, Jinan 250012, China
| | - Xianchen Liu
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; Shandong University Center for Suicide Prevention and Research, No.44, Wenhuaxi Rd, Lixia Dist, Jinan 250012, China; School of Psychology, South China Normal University, Shipai, Guangzhou 510631, China; The University of Tennessee Health Science Center, Memphis, TN 38163, USA.
| | - Cun-Xian Jia
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; Shandong University Center for Suicide Prevention and Research, No.44, Wenhuaxi Rd, Lixia Dist, Jinan 250012, China.
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Single nucleotide polymorphisms, variable number tandem repeats and allele influence on serotonergic enzyme modulators for aggressive and suicidal behaviors: A review. Pharmacol Biochem Behav 2019; 180:74-82. [PMID: 30928299 DOI: 10.1016/j.pbb.2019.03.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 03/26/2019] [Accepted: 03/26/2019] [Indexed: 11/22/2022]
Abstract
The serotonergic system plays key regulatory roles in cognition and emotion. Several lines of evidence suggest that genetic variation is associated with aggressive and suicidal behaviors. Genetic studies have largely focused on three types of variations: single nucleotide polymorphisms (SNPs), variable number tandem repeats (VNTRs), and alleles. 95 published papers (49 papers for aggression and 46 for suicide) were reviewed to summarize the impact of SNPs, VNTRs, and alleles of tryptophan hydroxylase (TPH, the rate-limiting enzyme in serotonin [5-HT] synthesis), 5-HT transporter (5-HTT), serotonergic receptors, monoamine oxidase (an enzyme that catalyzes 5-HT degradation) on aggression and suicidal behaviors. These study samples include healthy controls, psychiatric disease patients, and animal models. This article mainly reviews studies on the relationship between 5-HT transmissions and genetic variations involved in aggression (particularly impulsive aggression) or suicide in people with different ethnicities and psychiatric disorders. We found that most SNPs, VNTRs, and alleles exerted influences on aggression or suicide. Only A128C in TPH1, A138G in 5-HT2A, and L type in the VNTR of monoamine oxidase A (MAOA) affected both aggression and suicide. The associations between some genetic variations and aggression/suicide may be influenced by gender, age, ethnicity, psychiatric disease, and even parenting or prenatal stress. These findings may help clarify how genetic and environmental factors influence the development of aggressive and suicidal behaviors.
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Association of polymorphisms in HTR2A, TPH1, and TPH2 genes with attempted suicide in rural China. Psychiatr Genet 2019; 29:79-85. [PMID: 30789538 DOI: 10.1097/ypg.0000000000000221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE We aimed to test the association of polymorphisms in HTR2A, TPH1, and TPH2 genes with attempted suicide in rural China. PARTICIPANTS AND METHODS On the basis of a case-control study, we recruited 1200 pairs of participants from Shandong Province, China. The blood samples of 712 suicide attempters and 739 nonsuicide attempters were collected finally. We tested seven single nucleotide polymorphisms: rs6313 and rs6311 in HTR2A, rs4537731, rs1800532, and rs1799913 in TPH1, and rs4448731 and rs4641527 in TPH2. RESULTS In univariate analysis, allele C of rs4537731 was associated negatively with attempted suicide among total and male samples; however, the association was not statistically significant in multivariate analysis after adjusting for other potential confounding factors. No association between other six single nucleotide polymorphisms and attempted suicide was found in the total, male, or female samples. CONCLUSION This study did not support the effect of these seven serotonergic gene polymorphisms on attempted suicide in rural China.
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Zai CC, Tiwari AK, Zai GC, de Luca V, Shaikh SA, King N, Strauss J, Kennedy JL, Vincent JB. Sequence Analysis of Drug Target Genes with Suicidal Behavior in Bipolar Disorder Patients. MOLECULAR NEUROPSYCHIATRY 2018; 4:1-6. [PMID: 29998113 DOI: 10.1159/000488029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 02/26/2018] [Indexed: 12/21/2022]
Abstract
Background A number of genes have been implicated in recent genome-wide association studies of suicide attempt in bipolar disorder. More focused investigation of genes coding for protein targets of existing drugs may lead to drug repurposing for the treatment and/or prevention of suicide. Methods We analyzed 2,457 DNA variants across 197 genes of interest to GlaxoSmithKline across the pipeline in our sample of European patients suffering from bipolar disorder (N = 219). We analyzed these variants for a possible association with the suicide severity score (ranging from suicidal ideation/plan to serious suicide attempt) from the Schedule for Clinical Assessment in Neuropsychiatry. We conducted tests of individual variants and gene-based tests. Results We found a number of DNA variants in the transforming growth factor beta receptor 1 gene (TGFBR1) to be suggestively associated with suicide severity scores (p < 0.005). The gene-based tests also pointed to TGFBR1 to be associated with suicide severity (p = 0.0001). However, these findings were not replicated in an independent bipolar disorder sample. Conclusions We report no significant association between DNA sequences of drug target genes and suicidal behavior. Additional larger sequencing studies could further interrogate associations between variants in drug target genes and suicidal behavior.
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Affiliation(s)
- Clement C Zai
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.,Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Arun K Tiwari
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Gwyneth C Zai
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Vincenzo de Luca
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Sajid A Shaikh
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
| | - Nicole King
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
| | - John Strauss
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.,Medical Informatics, Child, Youth, and Family Program, CAMH, Toronto, Ontario, Canada
| | - James L Kennedy
- Neurogenetics Section, Molecular Brain Science, Tanenbaum Centre for Pharmacogenetics, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - John B Vincent
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.,Molecular Neuropsychiatry and Development (MiND) Laboratory, Campbell Family Mental Health Research Institute, CAMH, Toronto, Ontario, Canada
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Nine differentially expressed genes from a post mortem study and their association with suicidal status in a sample of suicide completers, attempters and controls. J Psychiatr Res 2017; 91:98-104. [PMID: 28327445 DOI: 10.1016/j.jpsychires.2017.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/01/2017] [Accepted: 03/09/2017] [Indexed: 01/28/2023]
Abstract
Several lines of evidence indicate that suicidal behaviour is partly heritable, with multiple genes implicated in its aetiology. We focused on nine genes (S100A13, EFEMP1, PCDHB5, PDGFRB, CDCA7L, SCN2B, PTPRR, MLC1 and ZFP36) which we previously detected as differentially expressed in the cortex of suicide victims compared to controls. We investigated 84 variants within these genes in 495 suicidal subjects (299 completers and 196 attempters) and 1513 controls (109 post-mortem and 1404 healthy). We evaluated associations with: 1) suicidal phenotype; 2) possible endophenotypes for suicidal behaviour. Overall positive results did not survive the correction threshold. However, we found a nominally different distribution of EFEMP1 genotypes, alleles and haplotypes between suicidal subjects and controls, results that were partially replicated when we separately considered the subgroup of suicide completers and post-mortem controls. A weaker association emerged also for PTPRR. Both EFEMP1 and PTPRR genes were also related to possible endophenotypes for suicidal behaviour such as anger, depression-anxiety and fatigue. Because of the large number of analyses performed and the low significance values further replication are mandatory. Nevertheless, neurotrophic gene variants, in particular EFEMP1 and PTPRR, may have a role in the pathogenesis of suicidal behaviour.
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Liu BP, Liu X, Jia CX. Characteristics of suicide completers and attempters in rural Chinese population. Compr Psychiatry 2016; 70:134-40. [PMID: 27624433 DOI: 10.1016/j.comppsych.2016.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/20/2016] [Accepted: 07/10/2016] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVE This study aimed to compare the similarities and differences between suicide completers and attempters in rural China. METHODS Two paired case-control studies of completed suicide and suicide attempts were conducted in rural Shandong, China. This analysis included 409 suicide attempters (SA) with a mean age of 43.90 (SD=13.31), 117 suicide completers (SC) with a mean age of 50.38 (SD=13.02) and their controls matched by gender, age (within 3years), and residence. Logistic regression models were used to examine risk factors of suicide attempts and completed suicide and the differences between SA and SC. RESULTS Compared to their matched controls, suicide attempters and completers shared the following common risk factors: low levels of education (middle school or under) (OR, 95% CI: 2.79, 1.40-5.55 for SA and 16.98, 1.59-181.60 for SC), negative life events (OR, 95% CI: 7.37, 4.73-11.50 for SA and 21.08, 4.74-93.71 for SC), and mental disorders (OR, 95% CI: 7.52, 3.85-14.69 for SA and 22.39, 2.65-189.60 for SC). Compared to suicide attempts, completed suicide was associated with the following risk factors: male gender (OR, 95% CI: 1.75, 1.06-2.90), advancing age (OR, 95% CI: 1.02, 1.00-1.04), poor family economic status (OR, 95% CI: 6.74, 3.22-14.13), prior suicide attempts (OR, 95% CI: 2.43, 1.18-4.97), family suicide history (OR, 95% CI: 2.59, 1.33-5.06), high suicide intent (OR, 95% CI: 1.15, 1.05-1.27), and highly lethal methods (OR, 95% CI: 13.65, 6.51-28.59). CONCLUSIONS Although suicide completers and attempters share some common risk factors, suicide completers are more likely to have prior suicide attempts, family suicide history, and higher suicidal intent, and to use highly lethal methods in rural Chinese.
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Affiliation(s)
- Bao-Peng Liu
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China
| | - Xianchen Liu
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China; The University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Cun-Xian Jia
- Department of Epidemiology, Shandong University School of Public Health, Jinan 250012, China.
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