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- W2580451686 abstract "This paper reports the presence of GM2 ganglioside containing N-glycolylneuraminic acid (NeuGc) in human colon cancer tissues. GM2(NeuGc) was detected by two-dimensional thin layer chromatography (2d-TLC)/enzyme-immunostaining using affinity-purified chicken antibody against GM3(NeuGc) and horseradish peroxidase-conjugated rabbit anti-chicken IgG antibody. Like usual GM2 ganglioside containing N-acetylneuraminic acid (NeuAc) isolated from Tay-Sachs brain, GM2(NeuGc) in colon cancer could be converted into GM3(NeuGc) by human kidney beta-N-acetylhexosaminidase A in the presence of a GM2-specific activator protein isolated from guinea pig kidney. Three of 7 specimens of Hanganutziu-Deicher (HD) antigen-positive human colon cancer tissues so far examined expressed this unique ganglioside. In order to detect and determine specifically GM2(NeuGc) on human colon cancers, specific antibody against GM2 (NeuGc) has been prepared by immunizing chickens. By a sensitive TLC/immunostaining method using the antibody, the amounts of the antigen were determined to be 0.3-3% of total lipid-bound sialic acid. NeuGc-containing gangliosides were also detected in meconium and fetal intestinal tissues. Three species of antigenic gangliosides in pooled meconium were tentatively identified as GM3(NeuGc), sialylparagloboside and sialylhexaosylceramide on the basis of their migration positions on 2d-TLC and the results of endo-beta-galactosidase treatment. GM3(NeuGc) was the sole HD-active ganglioside in fetal intestinal tissue from one of 3 individuals tested; the other two showed no HD-active ganglioside at all. GM2(NeuGc), however, could not be detected in either meconium or fetal tissues so far examined, suggesting that this unique ganglioside is a tumor-specific antigen, at least for human intestinal tissues." @default.
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- W2580451686 date "1987-01-01" @default.
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- W2580451686 title "Specific expression of unusual GM2 ganglioside with Hanganutziu-Deicher antigen activity on human colon cancers." @default.
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