ArticleGlycoconjugate journal1997
Neutral glycosphingolipids and gangliosides from spleen T lymphoblasts of genetically different inbred mouse strains.
Article in Glycoconjugate journal, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The gangliosides G(M1b), GalNAc-G(M1b) and G(D1alpha) are typical compounds of concanavalin A stimulated splenic T lymphoblasts of CBA/J inbred mice. Their structural characterization has been described in previous studies. The intention of this work was the comparative TLC immunostaining analysis of the glycosphingolipid composition of lectin stimulated splenic T lymphoblasts obtained from six genetically different inbred mouse strains. The strains examined were AKR, BALB/c, C57BL/6, CBA/J, DBA/2 and WHT/Ht, which are commonly used for biochemical and immunological studies. The neutral glycosphingolipid GgOse4Cer, the precursor for G(M1b)-type gangliosides, was expressed by all six strains investigated. AKR, C57BL/6 and DBA/2 showed high and BALB/c, CBA/J and WHT/Ht diminished expression in T lymphoblasts, based on single cell calculation. The gangliosides G(M1b) and GalNAc-G(M1b), elongation products of GgOse4Cer, displayed strain-specific differences in their intensities, which were found to correlate with the intensities of GgOse4Cer expression of the same strains. Concerning sialic acid substitution of gangliosides, G(M1b) and GalNAc-G(M1b) predominantly carry N-acetylneuraminic acid, whereas choleragenoid receptors G(M1a) and Gal-GalNAc-G(M1b), which are also expressed by all six strains, are characterized by dominance of N-glycolylneuraminic acid. Two highly polar gangliosides, designated with X and Y, which have not been previously recognized in murine lymphoid tissue, were detected by positive anti-GalNAc-G(M1b) antibody and choleragenoid binding, respectively. Both gangliosides were restricted to AKR, DBA/2 and C57BL/6 mice. The other three strains BALB/c, CBA/J and WHT/Ht are lacking these structures. In summary, the G(M1b)-type pathway is quite active in all six strains analysed in this study. Strain-specific genetic variations in T lymphoblast gangliosides were observed with the occurrence of gangliosides X and Y. This study and data from other groups strongly indicate for G(M1b)-type gangliosides a functional association with T cell activation and leukocyte mediated reactions.
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