Glycoconjugates of murine tumor lines with different metastatic capacities. II. Diversity of glycolipid composition

✍ Scribed by Reinhard Schwartz; Bernhard Kniep; Johannes Müthing; Peter F. Mühlradt

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: French
• Weight: 898 KB
• Volume: 36
• Category: Article
• ISSN: 0020-7136
• DOI: 10.1002/ijc.2910360514

✦ Synopsis

A syngeneic tumor system in DBN2 mice consisting of a methyl-cholanthrene-induced, weakly metastatic lymphoma, L5178YE (= Eb), its spontaneous strongly metastatic variant, L5178YES (=ESb), and an unrelated, methylcholanthrene-induced, metastasizing tumor, MDAY-D2, were used to study the relationship between metastatic behavior and composition of GSLs . The D-I-I4C galactose and D-1-14C glucosamine-labelled neutral GSL and gangliosides of these tumor cells, and additionally ConA-stimulated spleen T cells from normal mice, were analysed by thin-layer chromatography. Unlabelled GSLs of the tumors were also characterized by (HPLC) after perbenzoylation. Results obtained with the radioactively labelled GSLs correlated with those of the HPLC analysis of unlabelled GSLs. All tumors contained neutral GSL of the ganglio-series. Weakly metastatic tumor Eb showed neutral GSL patterns comparable to those from ConAstimulated spleen cells, whereas strongly metastatic tumors ESb and MDAY-D2 had an enhanced expression of lactosylceramide. Gangliosides of metastatic ESb and MDAY-D2 had a higher degree of polarity than those of weakly metastatic Eb. Eb cells expressed primarily GMI. Metastasizing ESb and MDAY-D2 had significantly higher amounts of GM3, GM2 and GDla. An unusual ganglioside, IV3GalNAc-GM I, was found in MDAY-D2 cells and ConA blasts. When the extent of label was compared in neutral GSLs and gangliosides, metastasizing ESb and MDAY-D2 were more heavily labelled in the ganglioside fraction (62Oh, 58' Yo) than Eb (39%). ESb and MDAY-D2 also contained larger amounts of gangliosides than Eb.