Simultaneous measurement of monoamine metabolites and 5-methyltetrahydrofolate in the cerebrospinal fluid of children

Tomoyuki Akiyama, Yumiko Hayashi, Yoshiyuki Hanaoka, Takashi Shibata, Mari Akiyama, Kazuyuki Nakamura, Yu Tsuyusaki, Masaya Kubota, Harumi Yoshinaga, Katsuhiro Kobayashi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background We describe a new method for simultaneous measurement of monoamine metabolites (3-O-methyldopa [3-OMD], 3-methoxy-4-hydroxyphenylethyleneglycol [MHPG], 5-hydroxyindoleacetic acid [5-HIAA], and homovanillic acid [HVA]) and 5-methyltetrahydrofolate (5-MTHF) and its use on cerebrospinal fluid (CSF) samples from pediatric patients. Methods Monoamine metabolites and 5-MTHF were measured by high-performance liquid chromatography with fluorescence detection. CSF samples were prospectively collected from children according to a standardized collection protocol in which the first 1-ml fraction was used for analysis. Results Monoamine metabolites and 5-MTHF were separated within 10 min. They showed linearity from the limit of detection to 1024 nmol/l. The limit of quantification of each metabolite was sufficiently low for the CSF sample assay. In 42 CSF samples after excluding cases with possibly altered neurotransmitter profiles, the concentrations of 3-OMD, MHPG, 5-HIAA, HVA, and 5-MTHF showed significant age dependence and their ranges were comparable with the reference values in the literature. The metabolite profiles of aromatic L-amino acid decarboxylase deficiency, Segawa disease, and folate receptor α defect by this method were compatible with those in the literature. Conclusions This method is a simple means of measuring CSF monoamine metabolites and 5-MTHF, and is especially useful for laboratories not equipped with electrochemical detectors.

Original languageEnglish
Pages (from-to)5-10
Number of pages6
JournalClinica Chimica Acta
Volume465
DOIs
Publication statusPublished - Feb 1 2017

Keywords

  • 3-O-methyldopa
  • 3-methoxy-4-hydroxyphenylethyleneglycol
  • 5-hydroxyindoleacetic acid
  • 5-methyltetrahydrofolate
  • Aromatic L-amino acid decarboxylase deficiency
  • Cerebral folate deficiency
  • Folate receptor α defect
  • Homovanillic acid
  • Neurotransmitters

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Biochemistry, medical

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