title: Modulation of leukosialin (sialophorin, CD43 antigen) on the cell surface of human hematopoietic cell lines induced by cytokins, retinoic acid and 1,25(OH)2-vitamin D3.
abstract: Cell surface expression of leukosialin (sialophorin, CD43 antigen) on human neoplastic hematopoietic cell lines K-562, U-937, HL-60 and REH was determined with the aid of a new CD43 monoclonal antibody (Bra7G) by the immunochemical (radioimmunoprecipitation, immunoblotting) and immunocytofluorometric techniques. Interferon-gamma and TNF-alpha were utilized as the "physiological" inducers of differentiation-associated markers. The "non-physiological" inducer phorbol ester PMA induced down-regulation of leukosialin cell surface expression on immature erythroid-myeloid leukemia cell line K-562, but up-regulation of CD43 antigen on the promyelocyte leukemia cell line HL-60 and, to a lesser extent on the monocyte-like U-937 and CALLA+ ALL cell line REH. Retinoic acid down-regulated leukosialin on both U-937 monocyte-like cells and the CALLA+ ALL cell line REH. In contrast to these data, interferon-gamma, TNF-alpha, retinoic acid and 1,25(OH)2-vitamin D3 induced the up-regulation of leukosialin in a promyelocytic leukemia cell line HL-60.
authors.affiliation: Cancer Research Institute, Slovak Academy of Sciences, Bratislava.
authors.forename: M
authors.initials: M
authors.lastname: Turzová
authors.forename: L
authors.initials: L
authors.lastname: Hunáková
authors.forename: J
authors.initials: J
authors.lastname: Duraj
authors.forename: P
authors.initials: P
authors.lastname: Speiser
authors.forename: J
authors.initials: J
authors.lastname: Sedlák
authors.forename: B
authors.initials: B
authors.lastname: Chorváth
mesh_terms: D015703:Antigens, CD / Q000096:biosynthesis*; D002117:Calcitriol / Q000494:pharmacology*; D016207:Cytokines / Q000494:pharmacology*; D005434:Flow Cytometry; D006801:Humans; D015151:Immunoblotting; D007371:Interferon-gamma / Q000494:pharmacology; D007938:Leukemia / Q000276:immunology*; D051917:Leukosialin; D011863:Radioimmunoassay; D012795:Sialoglycoproteins / Q000096:biosynthesis*; D014212:Tretinoin / Q000494:pharmacology*; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D015703:Antigens, CD; D016207:Cytokines; D051917:Leukosialin; C465014:SPN protein, human; D012795:Sialoglycoproteins; D014409:Tumor Necrosis Factor-alpha; D014212:Tretinoin; D007371:Interferon-gamma; D002117:Calcitriol