title: In vitro differentiation of a null-acute leukemia: T-lymphoid surface antigen expression associated with rearrangement in T-cell receptor beta chain variable genes.
abstract: We describe a human acute unclassified leukemia with a unique t(4;17) translocation that coexpresses T-lymphoid and myeloid surface antigens after in vitro culture in the presence of the tumor promoter, TPA. Under these conditions, the joining regions of the immunoglobulin heavy chain and T-cell receptor gamma and beta chain complexes remained in germ line configuration. A T-cell receptor beta chain variable gene probe, however, revealed the presence of rearrangements in the V beta M3-2 gene region after bilineage differentiation. These results may be pertinent to the interrelationship of T-cell receptor gene rearrangements and the control of T-cell antigen surface expression.
mesh_terms: D000208:Acute Disease; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000276:immunology; D000954:Antigens, Surface / Q000235:genetics; D002478:Cells, Cultured; D002886:Chromosomes, Human, Pair 17; D002894:Chromosomes, Human, Pair 4; D005819:Genetic Markers; D006801:Humans; D007135:Immunoglobulin Variable Region / Q000235:genetics; D007938:Leukemia / Q000235:genetics* / Q000276:immunology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D013601:T-Lymphocytes / Q000276:immunology; D014178:Translocation, Genetic
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D005819:Genetic Markers; D007135:Immunoglobulin Variable Region; D011948:Receptors, Antigen, T-Cell