title: Simultaneous determination of cystathionine and NAc-cystathionine using liquid chromatography atmospheric pressure chemical ionization mass spectrometry.
abstract: A method for simultaneous determination of cystathionine and NAc-cystathionine in biological samples has been developed by using column liquid chromatography-mass spectrometry. The concentrations of cystathionine and NAc-cystathionine in urine, several tissues, and serum of propargylglycine-treated rats with experimental cystathioninuria were determined by scanning the [M + H]+ ions of each compound. The recoveries of authentic compounds were 95.69 +/- 4.44% (n = 10) for cystathionine and 91.59 +/- 5.26% (n = 10) for NAc-cystathionine after ion-exchange resin treatment. The contents of cystathionine and NAc-cystathionine in the urine of a patient with cystathioninuria were also measured. The results coincided well with those obtained using an amino acid analyzer.
authors.affiliation: Department of Chemistry, Kochi Medical School, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: N
authors.initials: N
authors.lastname: Tsuboyama
authors.forename: H
authors.initials: H
authors.lastname: Kodama
mesh_terms: D000818:Animals; D002853:Chromatography, Liquid; D003540:Cystathionine / Q000032:analysis*; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D051381:Rats; D017208:Rats, Wistar
chemical_list: D003540:Cystathionine