Genetic Variants Associated With Adolescent Suicide Attempts: a Candidate-gene Association Study.
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 250
- 试验地点
- 2
- 主要终点
- Odds ratio (OR) and 95% confidence interval (CI) will be estimated using a logistic regression model to assessing the contribution of each polymorphism as a risk factor in predicting suicidal behavior
研究概览
简要总结
Suicidal behaviors is known to aggregate in families. The purpose of this study is to evaluate association between common polymorphisms in genes important for neurobiological pathways linked to suicidal behaviors and suicide attempt among adolescents patient.
详细描述
In France, suicide is the second leading cause of death among the 14-22 years population. Suicide behavior (SB) spans a spectrum ranging from suicidal ideation to suicide attempts and completed suicide. Several factors likely determine the predisposition to SB, including biological factors and psychosocial stressors. For biological factors, convergent evidence from adoption, family, and twin studies of suicide strongly suggests genetic contributions to liability for SB. Although genetic factors play a role in SB, identifying specific genes involved has proved challenging. Molecular-genetic technologies have made great advances in the past decade, including genome- wide searches for disease-causing genes with the linkage disequilibrium (LD) approach. Despite being a major public health problem in the youth population, genetic associations studies regarding suicidal behavior in adolescence are still rare. Genes that code for proteins involved in regulating serotonergic neurotransmission have thus been major candidate genes for association studies of SB. Among them, genes for serotonin metabolism (tryptophan hydroxylase, TPH), serotonin transport (5-HTT), and the serotonergic 2A (5-HT2A) receptor have received the most research attention.
The identification of relevant genetic variants or SNPs in others genes which are involved in the neurobiological pathways (which the alteration may contribute to a suicidal behavior) can help not only to advance knowledge of the genetic bases of suicide but also to identify new therapeutic targets.
On the basis of review of the literature, investigators will identify candidate genes that have been reported to be associated with suicidal events.
The investigators will target genes related to central serotonergic and noradrenergic neurotransmission, and monoamine metabolism (MAOA). The investigators will also study genes involved in glutamatergic neurotransmission (GRIK2, GRIA3) and in the HPA axis (FKBP5) and genes that code for neurotrophic proteins (BDNF).
DNA will be obtained from saliva. All genotyping will be carried out using standard polymerase chain reaction-based techniques that are routinely used in the Human Genetics Laboratory. DNA segments containing the target variable site will be amplified using unique sequence flanking primers.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Screening
- 盲法
- None
入排标准
- 年龄范围
- 13 Years 至 17 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age at admission between 13 and 17 years old
- •Hospitalized for attempted suicide
- •Absence of prominent mental retardation or organic brain damage
- •Fluent in French
- •Able to comprehend the study procedures and to undergo entry assessments safely
- •Provided written informed consent for study participation, and additional consent from the patient's parents or guardians
- •Northern and Western European ancestry (HapMap-CEU)
- •Medical insurance coverage
- •Healthy adult volunteers
- •No present or past psychiatric illness
- •No personal history of suicidal behavior and without a family history of suicide
- •Provided written informed consent for study participation
- •Northern or Western European ancestry (HapMap-CEU)
- •Medical insurance coverage
排除标准
- •Inability to get an informed and valid consent
- •Home address outside the selected hospitals' geographic areas
- •Intellectual disability or organic brain damage
- •Origine ethnique non CEU
- •Absence of medical insurance coverage
- •Pregnant or lactating women
- •Without Northern or Western European ancestry (HapMap-CEU)
- •Inability to get an informed and valid consent
- •Intellectual disability or organic brain damage
- •History of suicidal behavior
- •Psychiatric disorder, past or present
- •Family history of suicide
- •Borderline personality disorder
- •Absence of medical insurance coverage
- •Pregnant or lactating women
- •Without Northern or Western European ancestry (HapMap-CEU)
研究组 & 干预措施
Control group SNP Genotyping
Control subjects are young adults without suicide attempt and without mental disorders
干预措施: SNP genotyping (Genetic)
Inpatient group SNP Genotyping
Patients will be recruited from pediatric departments in which 13 -17 y old adolescents are hospitalized for a suicide attempt. Data will be collected through self-administered questionnaires and face to face interview. DNA will be extracted from saliva sample.
Individuals will be genotyped at a total of 96 SNPs
干预措施: SNP Genotyping (Genetic)
结局指标
主要结局
Odds ratio (OR) and 95% confidence interval (CI) will be estimated using a logistic regression model to assessing the contribution of each polymorphism as a risk factor in predicting suicidal behavior
时间窗: Between day 1 and day 5 during hospitalization
Measure is a composite outcome measure consisting of multiple measures Post hoc Bonferroni correction will be employed to correct for multiple testing. Chi- square test will performed to analyze genetic associations
次要结局
未报告次要终点