Brain and cerebrospinal fluid (CSF) levels of homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5-HIAA) were simultaneously measured in 48 individuals at autopsy. Concentrations of 5-HIAA and HVA in the cerebral cortex were positively correlated with their levels in the CSF for the same individual. Additionally a positive correlation was observed… (More)
CSF findings distinguished 12 elderly depressed patients who attempted suicide from nine depressed patients who did not and from seven normal control subjects. Psychosocial factors and measures of psychopathology did not differentiate suicidal from nonsuicidal patients. Biochemical factors may be important in evaluating suicide risk in the elderly.
1. In completed suicides, studies of brain regions and CSF indicate a dysfunction of the serotonergic system. 2. In suicidal patients, regardless of diagnoses, analyses of monoamine metabolites in lumbar CSF reveal decreased concentrations of the serotonin metabolite 5-HIAA. 3. In depressed suicidal patients, both low CSF 5-HIAA and low concentrations of… (More)
Emerging evidence suggests that inflammation has a key role in depression and suicidal behavior. The kynurenine pathway is involved in neuroinflammation and regulates glutamate neurotransmission. In the cerebrospinal fluid (CSF) of suicidal patients, levels of inflammatory cytokines and the kynurenine metabolite quinolinic acid (QUIN), an… (More)