title: Gliostatin/thymidine phosphorylase-regulated vascular endothelial growth-factor production in human fibroblast-like synoviocytes.
abstract: Gliostatin/thymidine phosphorylase (GLS/TP) is known to have angiogenic and arthritogenic activities. The purpose of this study was to elucidate whether GLS/TP is involved in the regulation of the angiogenic cytokine vascular endothelial growth factor (VEGF) in rheumatoid arthritis (RA). Fibroblast-like synoviocytes (FLSs) from patients with RA were cultured and stimulated with recombinant human GLS (rHuGLS) and interleukin (IL)-1beta. Immunohistochemistry showed that GLS/TP and VEGF were detectable in the synovial lining cells. In cultured FLSs, both VEGF mRNA and protein levels were markedly increased by rHuIL-1beta treatment. rHuGLS increased VEGF mRNA expression in a dose-dependent manner. We detected high concentrations of VEGF165 protein in culture supernatants from FLSs treated with rHuGLS (300 ng/ml), which were comparable to GLS levels found in synovial fluid of RA patients. These findings indicate that GLS/TP and VEGF have synergistic effects on angiogenesis in rheumatoid synovitis, and that GLS/TP has a role in regulating VEGF.
authors.affiliation: Department of Musculoskeletal Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho chou, Mizuho-Ku, Nagoya, 467-8601, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Tanikawa
authors.forename: Yuko
authors.initials: Y
authors.lastname: Waguri-Nagaya
authors.forename: Takuma
authors.initials: T
authors.lastname: Kusabe
authors.forename: Mineyoshi
authors.initials: M
authors.lastname: Aoyama
authors.forename: Kiyofumi
authors.initials: K
authors.lastname: Asai
authors.forename: Takanobu
authors.initials: T
authors.lastname: Otsuka
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000378:metabolism* / Q000473:pathology*; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005260:Female; D005347:Fibroblasts / Q000187:drug effects / Q000201:enzymology / Q000473:pathology*; D015870:Gene Expression / Q000187:drug effects; D006801:Humans; D007150:Immunohistochemistry; D066298:In Vitro Techniques; D053583:Interleukin-1beta / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D012333:RNA, Messenger / Q000378:metabolism; D011994:Recombinant Proteins / Q000378:metabolism / Q000494:pharmacology; D013583:Synovial Membrane / Q000201:enzymology / Q000473:pathology; D013939:Thymidine Phosphorylase / Q000378:metabolism* / Q000494:pharmacology; D042461:Vascular Endothelial Growth Factor A / Q000235:genetics / Q000378:metabolism*
chemical_list: D053583:Interleukin-1beta; D012333:RNA, Messenger; D011994:Recombinant Proteins; C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A; D013939:Thymidine Phosphorylase