6533b830fe1ef96bd1297a2b
RESEARCH PRODUCT
Sphingomyelin inhibition of Ciona intestinalis (Tunicata) cytotoxic hemocytes assayed against sheep erythrocytes
Nicolò ParrinelloVincenzo ArizzaMatteo CammarataLoredana Liparisubject
Cell ExtractsHemocytesCiona intestinaliCytotoxicityHemocyteTunicate;Cell membraneHemolysin Proteinschemistry.chemical_compoundSphingomyelin inhibition;InvertebratePhospholipidsCiona intestinalis;biologyInvertebrate;PhosphatidylserineCiona intestinalisSphingomyelinsCytotoxicity;Sheep erythrocytesCholesterolSphingomyelin Phosphodiesterasemedicine.anatomical_structureBiochemistrylipids (amino acids peptides and proteins)SphingomyelinHemolysis inhibitionSphingomyelin inhibitionCeramideHemolysis inhibition;ImmunologyTunicateHemolysisMembrane LipidsPhosphatidylcholinemedicineAnimalsCiona intestinalisPhosphatidylethanolamineSheepPhosphorylcholineCell MembraneOsmolar ConcentrationCytotoxicity Tests Immunologicbiology.organism_classificationCulture MediaHemocytes;chemistryChromatography Thin LayerDevelopmental Biologydescription
Hemocytes from the ascidian, Ciona intestinalis, are capable of lysing erythrocytes in vitro following cell membrane contact. With the aim of examining the mechanism of cytotoxicity, we performed inhibition experiments with lipid components of erythrocyte membranes. Cholesterol is not an inhibitor, whereas, among the phospholipids tested, (sphingomyelin, phosphatidylcholine, phosphatidylserine, phosphatidylethanolamine) sphingomyelin inhibits the hemolytic activity of hemocytes. However, thin layer chromatography showed that sphingomyelinase activity was not contained in the chloroform-methanol extracts from hemocyte debris. The inhibition capacity of the components ceramide and phosphorylcholine suggests that the entire sphingomyelin molecule is involved in binding cytolysins. The lysin-lipid interactions probably cause changes in erythrocyte membrane permeability, leading to lysis. © 1995.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-01 |