Gangliosides of murine T lymphocyte subpopulations.
Gangliosides from murine T lymphoblasts were analyzed by high-performance thin-layer chromatography followed by in situ neuraminidase treatment and immunostaining of the resulting asialogangliosides and compared with those from thymocytes and cloned T lymphocytes with defined functions. The ganglioside IVNeuGc/Ac-GgOse5Cer (GalNAc-GM1b), a marker for T lymphoblasts [Müthing, J., Egge, H., Kniep, B., & Mühlradt, P. F. (1987) Eur. J. Biochem. 163, 407-416], was found only in small amounts as the N-acetylated species in gangliosides from thymocytes and a cytolytic T cell clone. Two helper clones expressed this ganglioside like T blasts. The structures of the two major disialogangliosides from T blasts, IVNeuAc,IIINeuAc-GgOse4Cer (GD1 alpha type) with C24:0/24:1 and C16:0 fatty acids, were elucidated by neuraminidase treatment and immunostaining and by fast atom bombardment mass spectrometry. Gangliosides of this type were detected in thymocytes only in minor amounts, whereas GM1b-type gangliosides prevailed in cells from this organ. Analysis of the T lymphoblast gangliosides from six genetically unrelated mouse strains showed that terminally sialylated GgOse4Cer (GM1b), IVNeuAc-GgOse5Cer (GalNAc-GM1b), and IVNeuAc,IIINeuAc-GgOse4Cer (GD1 alpha) were conserved structures in all strains examined. We conclude that maturation or stimulation of T cells may be correlated with elongation of a common GM1b-type precursor structure resulting in GalNAc-GM1b or GD1 alpha-type gangliosides.
Müthing
J
J
GBF-Gesellschaft für Biotechnologische Forschung mbH, Braunschweig, FRG.
Schwinzer
B
B
Peter-Katalinić
J
J
Egge
H
H
Mühlradt
P F
PF
D000818:Animals; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002478:Cells, Cultured; D002855:Chromatography, Thin Layer / Q000379:methods; D002999:Clone Cells; D005260:Female; D005732:Gangliosides / Q000302:isolation & purification*; D008213:Lymphocyte Activation; D051379:Mice; D008806:Mice, Inbred AKR; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008969:Molecular Sequence Data; D009439:Neuraminidase; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000145:classification* / Q000276:immunology
D005732:Gangliosides; D009439:Neuraminidase