1996 年 40 巻 4 号 p. 193-197
Capillary zone electrophoresis (CZE) was applied to the separation and determination of two major monoamine metabolites, 5-hydroxyindoleacetic acid (5-HIAA) and homovanillic acid (HVA) in cerebrospinal fluid (CSF) from patients with neuropsychiatric disorders. Ethyl acetate extracts of acidified CSF were analyzed by CZE with ultraviolet absorbance detection (UVD). The peaks of 5-HIAA and HVA were clearly detected on the electropherograms, and their levels in the CSF samples were determined on the basis of the peak-area ratios relative to p-methoxybenzoate spiked as an internal standard. The results showed that the CSF levels of 5-HIAA and HVA reduced in patients with some diseases, such as Parkinson's disease, Altzheimer's disease, depressive illness, etc., supporting the conclusions obtained earlier by high-performance liquid chromatography (HPLC). The present CZE-UVD system, which consumes only a far smaller amout of sample solutions to be injected than that required in HPLC-UVD, seems to be useful as an aid in the biochemical diagnosis of neuropsychiatric disorders, especially in distinguishing dementia associated with central nervous system-degenerative diseases (both of the 5-HIAA and HVA levels in CSF are reduced) from that with cerebrovascular diseases (neither the CSF 5-HIAA nor HVA levels are changed).
