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Gangliosides of Echinococcus multilocularis metacestodes
F Persat1, J F Bouhours, A F Petavy
1Département de Parasitologie et Pathologie Exotique, Université Claude Bernard, Lyon, France.
Biochimica Et Biophysica Acta
|February 22, 1994
Summary
Echinococcus multilocularis metacestodes contain low levels of gangliosides, including GM1, GM3, and GD1a. These findings advance our understanding of parasite glycosphingolipid composition.
Area of Science:
- Biochemistry
- Parasitology
- Glycobiology
Background:
- Gangliosides are sialic acid-containing glycosphingolipids crucial in cellular functions.
- Echinococcus multilocularis is a parasitic cestode causing significant human disease.
Purpose of the Study:
- To identify and characterize gangliosides present in Echinococcus multilocularis metacestodes.
- To investigate the structural details of parasite-derived gangliosides.
Main Methods:
- Preparative high-performance thin-layer chromatography for ganglioside separation.
- Cholera toxin binding assay for GM1 identification.
- Sequential exoglycosidase degradation.
- Gas chromatography and mass spectrometry (electron impact and liquid secondary ion) for structural elucidation.
Main Results:
- Four distinct ganglioside fractions were isolated from E. multilocularis metacestodes.
- The major fraction was identified as ganglioside GM1, confirmed by cholera toxin binding.
- Other identified gangliosides included GM3 and GD1a, with GM2 present in lower amounts, all belonging to the a-ganglio-series.
- Analysis of the ceramide portion revealed the presence of sphingosine with unsaturated n24, saturated n24, and n16 fatty acids.
Conclusions:
- Parasitic metacestodes of Echinococcus multilocularis contain a limited repertoire of a-series gangliosides.
- The structural characterization provides insights into the glycosphingolipid composition of this parasite.