Quantitation of plasmatic lysosphingomyelin and lysosphingomyelin-509 for differential screening of Niemann-Pick A/B and C diseases

Anal Biochem. 2017 May 15:525:73-77. doi: 10.1016/j.ab.2017.02.019. Epub 2017 Mar 1.

Abstract

Acid sphingomyelinase deficiency (ASMd, Niemann-Pick disease A/B) and Niemann-Pick type C disease (NPC) share core clinical symptoms. Initial diagnostic discrimination of these two rare lysosomal storage diseases is thus difficult. As sphingomyelin accumulates in ASMd as well as NPC, lysosphingomyelin (sphingosylphosphorylcholine) and its m/z 509 analog were suggested as biomarkers for both diseases. Herein we present results of simultaneous LC-ESI-MS/MS measurements of lysosphingomyelin and lysosphingomyelin 509 in plasma and dried blood spots (DBS) collected from ASMd and NPC patients and suggest that the plasma but not DBS levels of the two analytes allow differential biochemical screening of ASMd and NPC.

Keywords: Lysosphingomyelin; Mass spectrometry; Niemann-Pick A/B; Niemann-Pick C; Screening; Sphingosylphosphorylcholine.

Publication types

  • Comparative Study

MeSH terms

  • Biomarkers / blood*
  • Case-Control Studies
  • Chromatography, Liquid / methods
  • Dried Blood Spot Testing / methods
  • Humans
  • Niemann-Pick Disease, Type A / blood*
  • Niemann-Pick Disease, Type A / diagnosis
  • Niemann-Pick Disease, Type B / blood*
  • Niemann-Pick Disease, Type B / diagnosis
  • Niemann-Pick Disease, Type C / blood*
  • Niemann-Pick Disease, Type C / diagnosis
  • Phosphorylcholine / analogs & derivatives*
  • Phosphorylcholine / blood
  • Spectrometry, Mass, Electrospray Ionization / methods
  • Sphingosine / analogs & derivatives*
  • Sphingosine / blood
  • Tandem Mass Spectrometry / methods

Substances

  • Biomarkers
  • sphingosine phosphorylcholine
  • Phosphorylcholine
  • Sphingosine