title: Tumor necrosis factor receptors in neuroblastoma SKNBE cells and their regulation by retinoic acid.
abstract: The human neuroblastoma cell line SKNBE can be differentiated either by serum removal or by adding to the culture medium different morphogens, for instance, retinoic acid (RA), cyclic AMP derivatives, and phorbol esters. Both the differentiated and undifferentiated cells express the two types of membrane tumor necrosis factor (TNF) receptors (TNFRs) of 55 and 75 kDa (p55 and p75 TNFR, respectively) and also their soluble forms. After RA addition the number of the surface TNFRs per cell is increased approximately twofold, but the kinetics of expression are different, depending on the receptor type. The level of the mRNAs of 2.4 and 4.2 kb, which, respectively, encode the p55 and p75 TNFRs, is also increased during the time course of differentiation, and the kinetics of their expression are biphasic. In contrast, the number of TNFRs and the level of their encoding mRNAs remain unchanged after exposure of the cells to both a phorbol and a cyclic AMP derivative.
authors.affiliation: INSERM U282, Hôpital Henri Mondor, Créteil, France.
authors.forename: A M
authors.initials: AM
authors.lastname: Chambaut-Guérin
authors.forename: M C
authors.initials: MC
authors.lastname: Martinez
authors.forename: C
authors.initials: C
authors.lastname: Hamimi
authors.forename: X
authors.initials: X
authors.lastname: Gauthereau
authors.forename: J
authors.initials: J
authors.lastname: Nunez
mesh_terms: D001790:Blood Physiological Phenomena; D003994:Bucladesine / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D006801:Humans; D009447:Neuroblastoma / Q000378:metabolism* / Q000473:pathology; D012333:RNA, Messenger / Q000378:metabolism; D018124:Receptors, Tumor Necrosis Factor / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014212:Tretinoin / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: D012333:RNA, Messenger; D018124:Receptors, Tumor Necrosis Factor; D014212:Tretinoin; D003994:Bucladesine; D013755:Tetradecanoylphorbol Acetate