Abstract
Concentrations of pros-methylimidazoleacetic acid (p-MIAA) were measured in cerebrospinal fluid of 30 patients with chronic schizophrenia. Levels of p-MIAA correlated negatively with mean scores of the Psychiatric Symptom Assessment Scale for positive symptoms (r = -0.48), but not negative symptoms, and with ventricular brain ratios (r = -0.48). Patients with abnormal ventricular enlargements had much lower concentrations of p-MIAA than those with normal ventricles. These results suggest that processes that reduce accumulation of p-MIAA in CSF may be associated with increased severity of symptoms among patients with chronic schizophrenia.
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