title: Cerebrospinal fluid monoamine metabolites and suicide.
abstract: Prospective studies of the serotonergic system and suicide report that low 5-hydroxyindolacetic acid (5-HIAA) in the cerebrospinal fluid (CSF) and a history of attempted suicide predict suicide risk. Low CSF homovanillic acid (HVA) is reported to be associated with past and future lethality of suicide attempts but not with suicide. The interrelationships between monoamine metabolites, violent method, suicide intent and lethality of suicidal behaviour are complex. We hypothesized that CSF 5-HIAA and HVA levels are related to suicide intent, violence and lethality of suicidal behaviour. Fifteen male suicide attempters admitted to a psychiatric ward at the Karolinska University Hospital and eight healthy male volunteers were submitted to lumbar puncture and CSF 5-HIAA and HVA were assayed. Suicide intent with the Beck Suicide Intent Scale (SIS), lethality and violence of suicidal behaviour were assessed. All patients were followed up for causes of death. Six suicides and one fatal accident were identified with death certificates. Mean CSF 5-HIAA but not CSF HVA differed between suicides and survivors. Violent suicides had higher suicide intent and CSF 5-HIAA than non-violent suicides. In violent suicides, CSF 5-HIAA levels were negatively correlated with SIS. Greater suicide intent may be associated with greater aggressive intent and predicts a violent suicide method.
authors.affiliation: Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden. jussi.jokinen@ki.se
authors.forename: Jussi
authors.initials: J
authors.lastname: Jokinen
authors.forename: Anna-Lena
authors.initials: AL
authors.lastname: Nordström
authors.forename: Peter
authors.initials: P
authors.lastname: Nordström
mesh_terms: D000328:Adult; D000374:Aggression / Q000502:physiology; D003866:Depressive Disorder / Q000134:cerebrospinal fluid / Q000523:psychology; D006719:Homovanillic Acid / Q000134:cerebrospinal fluid*; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000134:cerebrospinal fluid*; D033182:Intention; D008297:Male; D008875:Middle Aged; D010555:Personality Inventory / Q000706:statistics & numerical data; D011594:Psychometrics; D018570:Risk Assessment; D013223:Statistics as Topic; D013405:Suicide / Q000523:psychology*; D013406:Suicide, Attempted / Q000517:prevention & control / Q000523:psychology*; D014754:Violence / Q000523:psychology; D055815:Young Adult; D000092864:Suicide Prevention
chemical_list: D006897:Hydroxyindoleacetic Acid; D006719:Homovanillic Acid