Developmentally regulated surface structures of teratocarcinoma stem cells studied by mutant cell lines.
Monoclonal antibodies TEC-01, TEC-02, and TEC-03, which define three developmentally regulated antigens TEC-1 (SSEA-1-like), TEC-2, and TEC-3, have been used to isolate and characterize teratocarcinoma stem cell mutants with altered expression of surface glycoconjugates. Mutants lacking TEC-1 antigen have been isolated by exposing mutagenized P19S1801A1 cells to TEC-01 antibody, which was conjugated to the toxin from Ricinus communis. None of the mutants exhibits significant changes in the expression of TEC-3 antigen, but some are defective in the expression of TEC-2 antigen. Analysis of the expression of TEC-1,2,3 antigens in different lectin-resistant F9 and OTF9-63 cell lines has shown that all express TEC-1 antigen, but some lectin-resistant phenotypes exhibit reduction in the expression of TEC-2 and/or TEC-3 antigens. Mutational events in genes regulating the expression of specific glycosyltransferases or glycosidases appear to be the biochemical mechanism regulating the expression of TEC-1 and TEC-2 antigens.
D000818:Animals; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000276:immunology; D000954:Antigens, Surface / Q000276:immunology*; D002241:Carbohydrates / Q000276:immunology; D002460:Cell Line; D006224:Cricetinae; D003412:Cricetulus; D054278:Embryonal Carcinoma Stem Cells; D037102:Lectins; D009154:Mutation; D014411:Neoplastic Stem Cells / Q000276:immunology*; D010641:Phenotype; D013234:Stem Cells / Q000276:immunology*; D013724:Teratoma / Q000276:immunology* / Q000473:pathology; D014410:Tumor Stem Cell Assay
D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D002241:Carbohydrates; D037102:Lectins