title: Suppression of matrix metalloproteinase production in nasal fibroblasts by tranilast, an antiallergic agent, in vitro.
abstract: Allergic rhinitis is an inflammatory disease characterized by nasal wall remodeling with intense infiltration of eosinophils and mast cells/basophils. Matrix metalloproteinases (MMPs), MMP-2 and MMP-9, are the major proteolytic enzymes that induce airway remodeling. These enzymes are also important in the migration of inflammatory cells through basement membrane components. We evaluated whether tranilast (TR) could inhibit MMP production from nasal fibroblasts in response to tumor necrosis factor-alpha (TNF-alpha) stimulation in vitro. Nasal fibroblasts (NF) were established from nasal polyp tissues taken from patients with allergic rhinitis. NF (2 x 10(5) cells/mL) were stimulated with TNF-alpha in the presence of various concentrations of TR. After 24 hours, the culture supernatants were obtained and assayed for MMP-2, MMP-9, TIMP-1, and TIMP-2 levels by ELISA. The influence of TR on mRNA expression of MMPs and TIMPs in cells cultured for 12 hours was also evaluated by RT-PCR. TR at more than 5 x 10(-5) M inhibited the production of MMP-2 and MMP-9 from NF in response to TNF-alpha stimulation, whereas TIMP-1 and TIMP-2 production was scarcely affected. TR also inhibited MMP mRNA expression in NF after TNF-alpha stimulation. The present data suggest that the attenuating effect of TR on MMP-2 and MMP-9 production from NF induced by inflammatory stimulation may underlie the therapeutic mode of action of the agent in patients with allergic diseases, including allergic rhinitis.
authors.affiliation: Department of Otolaryngology, School of Medicine, Showa University, Tokyo, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Shimizu
authors.forename: Kenichi
authors.initials: K
authors.lastname: Kanai
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Asano
authors.forename: Tadashi
authors.initials: T
authors.lastname: Hisamitsu
authors.forename: Harumi
authors.initials: H
authors.lastname: Suzaki
mesh_terms: D000328:Adult; D018926:Anti-Allergic Agents / Q000494:pharmacology* / Q000627:therapeutic use; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005260:Female; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology* / Q000276:immunology; D006801:Humans; D008297:Male; D020778:Matrix Metalloproteinase 2 / Q000235:genetics / Q000378:metabolism*; D020780:Matrix Metalloproteinase 9 / Q000235:genetics / Q000378:metabolism*; D008875:Middle Aged; D009297:Nasal Mucosa / Q000166:cytology*; D012221:Rhinitis, Allergic, Perennial / Q000188:drug therapy / Q000276:immunology; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000235:genetics / Q000378:metabolism; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000235:genetics / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology; D062367:ortho-Aminobenzoates / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D018926:Anti-Allergic Agents; D019715:Tissue Inhibitor of Metalloproteinase-1; D014409:Tumor Necrosis Factor-alpha; D062367:ortho-Aminobenzoates; D019716:Tissue Inhibitor of Metalloproteinase-2; D020778:Matrix Metalloproteinase 2; D020780:Matrix Metalloproteinase 9; C012293:tranilast