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Related Experiment Videos

Urinary catecholamines and cortisol in parasuicide.

C Mancini1, G M Brown

  • 1Department of Psychiatry, McMaster University, Hamilton, Ontario, Canada.

Psychiatry Research
|July 1, 1992
PubMed
Summary

Suicide attempters show significantly higher urinary norepinephrine (NE) levels shortly after an attempt compared to those with suicidal ideation. This finding highlights acute neurochemical changes in individuals who attempt suicide.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Biochemistry

Background:

  • Previous research suggested a link between urinary catecholamines and suicide attempts.
  • Urinary free cortisol has also been implicated in violent suicide attempts.

Purpose of the Study:

  • To re-examine the relationship between urinary catecholamines, urinary free cortisol, and suicide attempts.
  • To investigate acute neurochemical changes in patients admitted to the hospital following a suicide attempt.

Main Methods:

  • Collected urine samples from patients within 24 hours of hospital admission.
  • Measured urinary catecholamines (norepinephrine, epinephrine, dopamine) and urinary free cortisol.
  • Compared biochemical levels between suicide attempters and a control group with suicidal ideation.
  • Assessed demographic data and psychological scales (e.g., Beck Depression Inventory, Hamilton Rating Scale for Depression).

Main Results:

  • Suicide attempters exhibited significantly higher urinary norepinephrine (NE) levels compared to controls.
  • Among attempters, those using physical means had the highest NE levels.
  • Urinary dopamine, epinephrine, NE/EPI ratio, urinary free cortisol, and serum cortisol did not differ between groups.
  • No significant differences were found in age, depression scores, hopelessness, suicidal ideation, or suicide intent between groups.

Conclusions:

  • Findings indicate increased norepinephrine output in the acute phase following suicide attempts.
  • The previously reported low NE/EPI ratio in suicidal patients may represent adaptive changes rather than the acute state.
  • Urinary NE levels could serve as a biomarker for the acute phase of suicide attempts.

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