scholarly journals The role of the serotonergic system in suicidal behavior

2013 ◽  
pp. 1699 ◽  
Author(s):  
Samaan ◽  
Marta Sadkowski ◽  
Robert Clayden ◽  
Dennis ◽  
Wala ElSheikh ◽  
...  
Keyword(s):  
Suicidal Behavior ◽  
Serotonergic System

Testing the Strain Theory of Suicide – The Moderating Role of Social Support

Crisis ◽  
2020 ◽  
Vol 41 (2) ◽  
pp. 82-88 ◽  
Author(s):  
Bob Lew ◽  
Ksenia Chistopolskaya ◽  
Yanzheng Liu ◽  
Mansor Abu Talib ◽  
Olga Mitina ◽  
...  
Keyword(s):  
Social Support ◽  
Suicidal Behavior ◽  
Online Survey ◽  
Perceived Social Support ◽  
Strain Theory ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Psychological Strains ◽  
Moderating Role

Abstract. Background: According to the strain theory of suicide, strains, resulting from conflicting and competing pressures in an individual's life, are hypothesized to precede suicide. But social support is an important factor that can mitigate strains and lessen their input in suicidal behavior. Aims: This study was designed to assess the moderating role of social support in the relation between strain and suicidality. Methods: A sample of 1,051 employees were recruited in Beijing, the capital of China, through an online survey. Moderation analysis was performed using SPSS PROCESS Macro. Social support was measured with the Multidimensional Scale of Perceived Social Support, and strains were assessed with the Psychological Strains Scale. Results: Psychological strains are a good predictor of suicidality, and social support, a basic need for each human being, moderates and decreases the effects of psychological strains on suicidality. Limitations: The cross-sectional survey limited the extent to which conclusions about causal relationships can be drawn. Furthermore, the results may not be generalized to the whole of China because of its diversity. Conclusion: Social support has a tendency to mitigate the effects of psychological strains on suicidality.

Protective Factors and Suicidality in Members of Arab Kindred

Crisis ◽  
2012 ◽  
Vol 33 (2) ◽  
pp. 80-86 ◽  
Author(s):  
Sami Hamdan ◽  
Nadine Melhem ◽  
Israel Orbach ◽  
Ilana Farbstein ◽  
Mohammad El-Haib ◽  
...  
Keyword(s):  
Risk Factors ◽  
Protective Factors ◽  
Suicidal Behavior ◽  
Composite International Diagnostic Interview ◽  
Diagnostic Interview ◽  
Suicidal Risk ◽  
Arab Population ◽  
Psychiatric Interview ◽  
History Of

Background: Relatively little is known about the role of protective factors in an Arab population in the presence of suicidal risk factors. Aims: To examine the role of protective factors in a subsample of in large Arab Kindred participants in the presence of suicidal risk factors. Methods: We assessed protective and risk factors in a sample of 64 participants (16 suicidal and 48 nonsuicidal) between 15 and 55 years of age, using a comprehensive structured psychiatric interview, the Composite International Diagnostic Interview (CIDI), self-reported depression, anxiety, hopelessness, impulsivity, hostility, and suicidal behavior in first-degree and second-relatives. We also used the Religiosity Questionnaire and suicide attitude (SUIATT) and multidimensional perceived support scale. Results: Suicidal as opposed to nonsuicidal participants were more likely to have a lifetime history of major depressive disorder (MDD) (68.8% vs. 22.9% χ2 = 11.17, p = .001), an anxiety disorder (87.5% vs. 22.9, χ2 = 21.02, p < .001), or posttraumatic stress disorder (PTSD) (25% vs. 0.0%, Fisher’s, p = .003). Individuals who are otherwise at high risk for suicidality have a much lower risk when they experience higher perceived social support (3.31 ± 1.36 vs. 4.96 ± 1.40, t = 4.10, df = 62, p < .001), and they have the view that suicide is somehow unacceptable (1.83 ± .10 vs. 1.89 ± .07, t = 2.76, df = 60, p = .008). Conclusions: Taken together with other studies, these data suggest that the augmentation of protective factors could play a very important role in the prevention of incidental and recurrent suicidal behavior in Arab populations, where suicidal behavior in increasing rapidly.

Stress, Cortisol and Suicide Risk

2019 ◽  
Author(s):  
Daryl Brian O'Connor
Keyword(s):  
Risk Factors ◽  
Suicidal Behavior ◽  
Suicide Risk ◽  
Stressful Events ◽  
Additional Risk ◽  
Global Health Issue ◽  
History Of ◽  
Hpa Axis Activity ◽  
The Impact

Suicide is a global health issue accounting for at least 800,000 deaths per annum. Numerous models have been proposed that differ in their emphasis on the role of psychological, social, psychiatric and neurobiological factors in explaining suicide risk. Central to many models is a stress-diathesis component which states that suicidal behavior is the result of an interaction between acutely stressful events and a susceptibility to suicidal behavior (a diathesis). This article presents an overview of studies that demonstrate that stress and dysregulated hypothalamic-pituitary-adrenal (HPA) axis activity, as measured by cortisol levels, are important additional risk factors for suicide. Evidence for other putative stress-related suicide risk factors including childhood trauma, impaired executive function, impulsivity and disrupted sleep are considered together with the impact of family history of suicide, perinatal and epigenetic influences on suicide risk.

The role of tryptophan in hepatic encephalopathy

1993 ◽  
Vol 5 (4) ◽  
pp. 71-75
Author(s):  
C. Aaldijk ◽  
W.W. Van Den Broek ◽  
R.C. Van Der Mast
Keyword(s):  
Hepatic Encephalopathy ◽  
Clinical Picture ◽  
Serotonergic System ◽  
Pathogenetic Mechanisms ◽  
Research Findings ◽  
Glutamine Synthesis ◽  
The Brain ◽  
Tryptophan Uptake

SummaryIn this review the most important hypotheses for the occurrence of the clinical picture of hepatic encephalopathy are discussed. As possible pathogenetic mechanisms are raised: dysfunction of the serotonergic system due to an increased tryptophan uptake in the brain, an elevated intracerebral ammoniac concentration and glutamine synthesis, and a heightened intracerebral GABA-activity.The dysregulation of the serotonergic system as a consequence of the increased intracerebral tryptophan uptake is described as one of the most important pathogenetic mechanisms. The elevated intracerebral ammoniac concentration and the elevated intracerebral glutamine synthesis play in this a facilitating role. The similarity in symptomatology of the clinical picture of HE and the serotonergic syndrome support this hypothesis. Due to contradictory research findings the role of the GABA-ergic system and the occurrence of HE remains unclear.

The role of brain-derived neurotrophic factor in the pathophysiology of adolescent suicidal behavior

2011 ◽  
Vol 23 (3) ◽  
Author(s):  
Leo Sher
Keyword(s):  
At Risk ◽  
Psychiatric Disorders ◽  
Suicidal Behavior ◽  
Neurotrophic Factor ◽  
Adolescent Suicide ◽  
Developmental Change ◽  
Brain Derived Neurotrophic Factor ◽  
Childhood And Adolescence ◽  
Compulsive Disorder

Abstract Adolescent suicide research has mostly focused on demographic risk factors. Such studies focus on who is at risk, but do not explain why certain adolescents are at risk for suicide. Studies of the neurobiology of adolescent suicide could clarify why some youths are more suicidal than others and help to find biological markers of suicidal behavior in teenagers. Over the past decade the role of brain-derived neurotrophic factor (BDNF) in the pathophysiology of suicidal behavior has attracted significant attention of scientists. BDNF is involved in the pathophysiology of many psychiatric disorders associated with suicidal behavior including depression, post-traumatic stress disorder, schizophrenia, and obsessive-compulsive disorder. BDNF dysregulation could be associated with increased suicidality independently of psychiatric diagnoses. BDNF plays an important role in the regulation and growth of neurons during childhood and adolescence. Prominent among the brain regions undergoing developmental change during adolescence are stressor-sensitive areas. The serotonin dysfunction found in adolescent and adult suicidal behavior could be related to the low level of BDNF, which impedes the normal development of serotonin neurons during brain development. BDNF dysfunction could play a more significant role in the pathophysiology of psychiatric disorders and suicidal behavior in adolescents than in adults. Treatment-induced enhancement in the BDNF function could reduce suicidal behavior secondary to the improvement in psychiatric pathology or independently of improvement in psychiatric disorders. It is interesting to hypothesize that BDNF could be a biological marker of suicidal behavior in adolescents or in certain adolescent populations.

Suicidal behavior among adolescents with conduct disorder—the role of alcohol dependence

2007 ◽  
Vol 150 (3) ◽  
pp. 305-311 ◽  
Author(s):  
Essi Ilomäki ◽  
Pirkko Räsänen ◽  
Kaisa Viilo ◽  
Helinä Hakko
Keyword(s):  
Conduct Disorder ◽  
Alcohol Dependence ◽  
Suicidal Behavior
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