期刊
CLINICAL CHEMISTRY AND LABORATORY MEDICINE
卷 55, 期 3, 页码 403-414出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/cclm-2016-0340
关键词
Fabry; Gaucher; glucosylsphingosine; Krabbe; LC-MS/MS; LysoGb3; lysosphingolipids; lysosphingomyelin; Niemann-Pick; psychosine
资金
- Associazione COMETA-ASMME
Background: Lysosphingolipids (LysoSLs) are derivatives of sphingolipids which have lost the amide-linked acyl chain. More recently, LysoSLs have been identified as storage compounds in several sphingolipidoses, including Gaucher, Fabry and Niemann-Pick diseases. To date, different methods have been developed to measure each individual lysosphingolipid in plasma. This report describes a rapid liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) assay for simultaneous quantification of several LysoSLs in plasma. Methods: We analyzed the following compounds: hexosylsphingosine (HexSph), globotriaosylsphingosine (LysoGb3), lysosphingomyelin (LysoSM) and lysosphingomyelin-509 (LysoSM-509). The sample preparation requires only 100 mu L of plasma and consists of an extraction with a mixture of MeOH/acetone/H2O (45:45:10, v/v). Results: The method validation showed high sensitivity, an excellent accuracy and precision. Reference ranges were determined in healthy adult and pediatric population. The results demonstrate that the LC-MS/MS method can quantify different LysoSLs and can be used to identify patients with Fabry (LysoGb3), Gaucher and Krabbe (HexSph) diseases, prosaposine deficiency (LysoGb3 and HexSph), and Niemann-Pick disease types A/B and C (LysoSM and LysoSM-509). Conclusions: This LC-MS/MS method allows a rapid and simultaneous quantification of LysoSLs and is useful as a biochemical diagnostic tool for sphingolipidoses.
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