title: Homovanillic acid (HVA) urinary excretion and day/night rhythm of chronic schizophrenic patients. Preliminary observations.
abstract: The authors report, as compared to healthy subjects, a higher daily excretion and a higher urinary variations of homovanillic acid (HVA) for schizophrenic chronic paranoid patients (patients with positive symptomatology predominating, CROW,s type I). Inversely, a lower HVA excretion and probably an inversion of the circadian rhythm of urinary HVA were found for schizophrenic chronic undifferentiated patients (patients with negative symptomatology predominating, CROW's type II). These results have to be confirmed by the study of a greater number of patients and the measure, for comparison among themselves, of other precursors and metabolites of monoamines.
mesh_terms: D000328:Adult; D001683:Biological Clocks; D002908:Chronic Disease; D005260:Female; D006719:Homovanillic Acid / Q000652:urine*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012559:Schizophrenia / Q000503:physiopathology* / Q000652:urine; D012563:Schizophrenia, Paranoid / Q000503:physiopathology / Q000652:urine
chemical_list: D006719:Homovanillic Acid