FullText URL K0005427_other1.pdf
Author Okano, Mitsuhiro| Fujiwara, Tazuko| Kariya, Shin| Higaki, Takaya| Makihara, Sei-ichiro| Haruna, Takenori| Noyama, Yasuyuki| Koyama, Takahisa| Omichi, Ryotaro| Orita, Yorihisa| Miki, Kentaro| Kanai, Kengo| Nishizaki, Kazunori|
Abstract BACKGROUND: Toll-like receptor 3 (TLR3) is expressed in upper airways, however, little is known regarding whether Toll-like receptor 3 (TLR3) signals exert a regulatory effect on the pathogenesis of chronic rhinosinusitis with nasal polyps (CRSwNP), especially on eosinophilic inflammation. We sought to investigate the effect of Poly(IC), the ligand for TLR3, on cytokine production by dispersed nasal polyp cells (DNPCs). METHODS: DNPCs were pretreated with or without Poly(IC), and were then cultured in the presence or absence of staphylococcal enterotoxin B (SEB), following which the levels of IL-5, IL-10, IL-13, IL-17A and interferon (IFN)-γ in the supernatant were measured. To determine the involvement of IL-10 and cyclooxygenase in Poly(IC)-mediated signaling, DNPCs were treated with anti-IL-10 monoclonal antibody and diclofenac, the cyclooxygenase inhibitor, respectively. Poly(IC)-induced prostaglandin E2 (PGE2) production was also determined. RESULTS: Exposure to Poly(IC) induced a significant production of IL-10, but not of IL-5, IL-13, IL-17A or IFN-γ by DNPCs. Pretreatment with Poly(IC) dose-dependently inhibited SEB-induced IL-5, IL-13 and IL-17A, but not IFN-γ production. Neutralization of IL-10 significantly abrogated the inhibitory effect of Poly(IC). Treatment with diclofenac also abrogated the inhibitory effect of Poly(IC) on SEB-induced IL-5 and IL-13 production. However, unlike exposure of diclofenac-treated DNPCs to lipopolysaccharide, the ligand for TLR4, exposure of these cells to Poly(IC) did not enhance IL-5 or IL-13 production. Poly(IC) did not significantly increase PGE2 production by DNPCs. CONCLUSIONS: These results suggest that TLR3 signaling regulates eosinophilia-associated cytokine production in CRSwNP, at least in part, via IL-10 production.
Keywords Chronic rhinosinusitis with nasal polyps IL-10 IL-5 Poly(IC) Toll-like receptor
Note 学位審査副論文
Published Date 2016-01
Publication Title Allergology international : official journal of the Japanese Society of Allergology
Volume volume65
Issue issue1
Publisher Elsevier
Start Page 96
End Page 102
ISSN 1323-8930
NCID AA11091750
Content Type Journal Article
language 英語
OAI-PMH Set 岡山大学
Copyright Holders https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
File Version publisher
PubMed ID 26666485
Web of Sience KeyUT 000367238600015
Related Url https://doi.org/10.1016/j.alit.2015.08.005 http://ousar.lib.okayama-u.ac.jp/54846