title: p55 and p75 tumor necrosis factor receptor expression on human glioblastoma cells.
abstract: Expression of the two types of tumor necrosis factor (TNF) receptor, p55 and p75, in 12 human glioblastoma cell lines was studied. Reverse-transcription polymerase chain reaction detected messenger ribonucleic acid (mRNA) transcripts of p55 TNF receptor in all 12 cell lines tested, but p75 TNF receptor mRNA in only four cell lines. Flow cytometric analysis with anti-p55 and anti-p75 TNF receptor monoclonal antibodies demonstrated both p55 and p75 proteins in these four cell lines, but the level of expression of p75 molecule was very low. Correlation of p55 and p75 TNF receptor expression with TNF-induced growth suppression and production of bioactive molecules (interleukin-6, interleukin-8, manganase-superoxide dismutase, prostaglandin E2) showed that p55 TNF receptor mediates these TNF actions, but none of the responses were influenced by the presence of the p75 TNF receptor, which apparently has no specific role.
authors.affiliation: Department of Neurosurgery, Hokkaido University School of Medicine, Sapporo.
authors.forename: T
authors.initials: T
authors.lastname: Kato
authors.forename: Y
authors.initials: Y
authors.lastname: Sawamura
authors.forename: M
authors.initials: M
authors.lastname: Tada
authors.forename: S
authors.initials: S
authors.lastname: Sakuma
authors.forename: M
authors.initials: M
authors.lastname: Sudo
authors.forename: H
authors.initials: H
authors.lastname: Abe
mesh_terms: D001483:Base Sequence; D002478:Cells, Cultured; D046508:Culture Techniques; D015232:Dinoprostone / Q000096:biosynthesis; D005434:Flow Cytometry; D015870:Gene Expression; D005909:Glioblastoma / Q000188:drug therapy* / Q000235:genetics*; D006801:Humans; D007150:Immunohistochemistry; D015850:Interleukin-6 / Q000096:biosynthesis; D016209:Interleukin-8 / Q000096:biosynthesis; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger; D018124:Receptors, Tumor Necrosis Factor / Q000502:physiology*; D014409:Tumor Necrosis Factor-alpha / Q000627:therapeutic use*
chemical_list: D015850:Interleukin-6; D016209:Interleukin-8; D012333:RNA, Messenger; D018124:Receptors, Tumor Necrosis Factor; D014409:Tumor Necrosis Factor-alpha; D015232:Dinoprostone