Halfon N.,University of Quebec at Montreal |
Labelle R.,University of Quebec at Montreal |
Labelle R.,University of Montreal |
Cohen D.,University Pierre and Marie Curie |
And 5 more authors.
European Child and Adolescent Psychiatry
Although children and adolescents with bipolar disorder (BD) are at elevated risk for suicide, little research to date has been conducted on suicidality in this population. The purpose of this descriptive review of the past 10 years of scientific literature on suicidality in youths with BD was to identify the risk and protective factors associated with this phenomenon, and to discuss the implications for research and clinical practice. Searches on Medline and PsycINFO databases for the period from early 2002 to mid-2012 yielded 16 relevant articles, which were subsequently explored using an analysis grid. Note that the authors employed a consensus analysis approach at all stages of the review. Four primary categories of risk factors for suicidality in youths with BD were identified: demographic (age and gender), clinical (depression, mixed state or mixed features specifier, mania, anxiety disorders, psychotic symptoms, and substance abuse), psychological (cyclothymic temperament, hopelessness, poor anger management, low self-esteem, external locus of control, impulsivity and aggressiveness, previous suicide attempts, and history of suicide ideation, non-suicidal self-injurious behaviors and past psychiatric hospitalization), and family/social (family history of attempted suicide, family history of depression, low quality of life, poor family functioning, stressful life events, physical/sexual abuse, and social withdrawal). Youths with BD who experienced more complex symptomatic profiles were at greater risk of suicidality. Few protective factors associated with suicidality have been studied among youths with BD. One protective factor was found in this descriptive literature review: the positive effects of dialectical behavior therapy. This article allows a better appreciation of the risk and protective factors associated with suicidality among youth with BD. Greater awareness of risk factors is the first step in suicide prevention. © 2012 Springer-Verlag Berlin Heidelberg. Source
Riedi G.,Toulouse 1 University Capitole |
Mathur A.,Toulouse 1 University Capitole |
Seguin M.,McGill Group for Suicide Studies |
Bousquet B.,Toulouse 1 University Capitole |
And 5 more authors.
Background: Repeated episode(s) of deliberate self-harm (RDSH) is a major risk factor for suicide. Aims: To identify specific risk factors for RDSH among patients admitted following an episode of deliberate self-harm (DSH) through acute intoxication. Methods: A prospective 6-month study was conducted with 184 patients (71% female) admitted to the emergency room (ER) as a result of self-poisoning (SP). Results: Rate of RDSH stood at 18% after 6 months. The sociodemographic variables associated with repeated deliberate self-harm were to have no principal activity, consultation with a medical professional during the 6 months preceding the self-poisoning, and referral to psychiatric services upon release from the ER. The clinical variable associated with RDSH was alcohol addiction (OR = 2.7; IC 95% = 1.2-6.1, p < .05) as assessed at the time of the initial ER admission. Conclusions: When patients are initially admitted to the ER as a result of self-poisoning, it is important to evaluate specific factors, particularly alcohol use, that could subsequently lead to repeated deliberate self-harm. The goal is to improve the targeting and referral of patients toward structures that can best respond to their needs. © 2012 Hogrefe Publishing. Source
Maunakea A.K.,University of California at San Francisco |
Maunakea A.K.,U.S. National Institutes of Health |
Nagarajan R.P.,University of California at San Francisco |
Bilenky M.,BC Cancer Agency |
And 26 more authors.
Although it is known that the methylation of DNA in 5′ promoters suppresses gene expression, the role of DNA methylation in gene bodies is unclear. In mammals, tissue-and cell type-specific methylation is present in a small percentage of 5′ CpG island (CGI) promoters, whereas a far greater proportion occurs across gene bodies, coinciding with highly conserved sequences. Tissue-specific intragenic methylation might reduce, or, paradoxically, enhance transcription elongation efficiency. Capped analysis of gene expression (CAGE) experiments also indicate that transcription commonly initiates within and between genes. To investigate the role of intragenic methylation, we generated a map of DNA methylation from the human brain encompassing 24.7 million of the 28 million CpG sites. From the dense, high-resolution coverage of CpG islands, the majority of methylated CpG islands were shown to be in intragenic and intergenic regions, whereas less than 3% of CpG islands in 5′ promoters were methylated. The CpG islands in all three locations overlapped with RNA markers of transcription initiation, and unmethylated CpG islands also overlapped significantly with trimethylation of H3K4, a histone modification enriched at promoters. The general and CpG-island-specific patterns of methylation are conserved in mouse tissues. An in-depth investigation of the human SHANK3 locus and its mouse homologue demonstrated that this tissue-specific DNA methylation regulates intragenic promoter activity in vitro and in vivo. These methylation-regulated, alternative transcripts are expressed in a tissue-and cell type-specific manner, and are expressed differentially within a single cell type from distinct brain regions. These results support a major role for intragenic methylation in regulating cell context-specific alternative promoters in gene bodies. © 2010 Macmillan Publishers Limited. All rights reserved. Source
Jollant F.,McGill University |
Jollant F.,University Institute of Mental Health |
Jollant F.,McGill Group for Suicide Studies |
Guillaume S.,Montpellier University |
And 8 more authors.
Disadvantageous decision-making has been reported in patients who had attempted suicide and may represent a cognitive risk factor for suicide. Making decisions necessitates both implicit/associative and explicit/analytic processes. Here, we explored explicit mechanisms, and hypothesized that suicide attempters fail to use explicit understanding to make favorable choices. The Iowa Gambling Task (IGT) was used to assess decision-making in 151 non-depressed patients with a history of mood disorder and suicidal act, 81 non-depressed patients with a history of mood disorders but no suicidal act, and 144 healthy individuals. After performing the task, we assessed the explicit understanding of the participants of the contingencies in the task, i.e. which options yielded higher gain or loss. Correct explicit understanding was reported less often in suicide attempters and affective controls than in healthy controls (45.7% and 42.0% vs. 66.0%). Moreover, understanding was associated with better performance in healthy and affective controls, but not in suicide attempters, with no between-group difference among those who did not reach understanding. Patients with histories of suicide attempt, therefore, show a disconnection between what they "know" and what they "do", possibly reflecting underlying impairments in implicit associative processes. These cognitive alterations should be addressed in preventative interventions targeting suicide. © 2013 Elsevier Ireland Ltd. Source
McGirr A.,McGill Group for Suicide Studies |
Diaconu G.,McGill Group for Suicide Studies |
Berlim M.T.,McGill Group for Suicide Studies |
Pruessner J.C.,McGill University |
And 3 more authors.
Journal of Psychiatry and Neuroscience
Background: Suicidal behaviour aggregates in families, and the hypothalamic-pituitary-adrenal (HPA) axis and noradrenergic dysregulation may play a role in suicide risk. It is unclear whether stress dysregulation is a heritable trait of suicide or how it might increase risk. We investigated stress reactivity of the autonomic nervous system and the HPA axis in suicide predisposition and characterized the effect of this dysregulation on neuropsychologic function. Methods: In this family-based study of first-degree relatives (n = 14) of suicide completers and matched controls with no family or personal history of suicidal behaviour (n = 14), participants underwent the Trier Social Stress Test (TSST). We used salivary α-amylase and cortisol levels to characterize stress reactivity and diurnal variation. We administered a series of neuropsychologic and executive function tests before and after the TSST. Results: Despite normal diurnal variation, relatives of suicide completers exhibited blunted cortisol and α-amylase TSST reactivity. Although there were no baseline differences in conceptual reasoning, sustained attention or executive function, the relatives of suicide completers did not improve on measures of inhibition upon repeated testing after TSST. Secondary analyses suggested that these effects were related to suicide vulnerability independ ent of major depression. Limitations: The sample size was small, and the design prevents us from disentangling our findings from the possible traumatic consequences of losing a relative by suicide. Conclusions: Blunted stress response may be a trait of suicide risk, and impairment of stress-induced executive function may contribute to suicide vulnerability. © 2010 Canadian Medical Association. Source