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Related Experiment Video

Updated: Sep 15, 2025

Network Pharmacology and Validation of the Antidepressant Mechanisms of Qiangzhifang in a Chronic Restraint Stress-induced Depression Rat Model
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Interacting immediate and long-term action regulation in suicidal behavior.

Nicholas Murphy1, George Kypriotakis2, Marijn Lijffijt1

  • 1Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, USA.

Journal of Mood and Anxiety Disorders
|July 14, 2025
PubMed
Summary

Identifying suicide risk involves understanding both immediate and long-term factors. Minimizing childhood trauma and managing stress-related hyperarousal are key to preventing medically severe suicide attempts (MSSA).

Keywords:
Aggressive behaviorAlcoholImpulsive behaviorMinimizationSuicideTrauma

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Area of Science:

  • Psychology
  • Neuroscience
  • Psychiatry

Background:

  • Suicide is a leading cause of death, particularly among young adults.
  • Suicidal crises often stem from complex interactions of long-term psycho-bio-social factors.
  • Identifying individuals susceptible to suicide requires understanding immediate and long-term regulatory mechanisms.

Purpose of the Study:

  • To investigate the interplay between immediate and long-term action regulation in suicide risk.
  • To differentiate characteristics of individuals with medically severe suicide attempts (MSSA) from those with suicidal ideation but no attempt.

Main Methods:

  • Assessed immediate processes via affective/behavioral symptoms and the Immediate Memory Task (IMT) for action regulation.
  • Evaluated long-term factors including trauma history, stress, and addictive behaviors.
  • Measured global suicidal behavior using Beck Suicidal Ideation at its Worst (SSI-W) in 28 MSSA survivors and 23 controls.

Main Results:

  • Medically severe suicide attempt (MSSA) correlated with impulsive IMT responses, Internal State Scale (ISS) activation, and Lifetime Cumulative Adversity (LCA), independent of SSI-W.
  • Minimization-denial of childhood trauma directly increased MSSA but reduced reported SSI-W.
  • MSSA was indirectly linked to depression, aggression, and alcohol use severity via SSI-W.

Conclusions:

  • Medically severe suicide attempt (MSSA) is influenced by factors both dependent and independent of suicidal ideation severity, notably denial of childhood trauma.
  • Stress-related hyperarousal and denial of early trauma contribute to MSSA through ISS activation, LCA, and impulsive IMT responses.
  • These findings can help identify individuals needing preventive interventions for suicide risk, even without prior attempts or diagnoses.