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A study on NO-superoxide system in nasal mucosal diseases

Research Project

Project/Area Number 16591730
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Otorhinolaryngology
Research InstitutionNihon University

Principal Investigator

HISAMATSU Ken-ichi  Nihon University, School of Medicine, Assistant Professor, 医学部, 講師 (60165107)

Co-Investigator(Kenkyū-buntansha) MAKIYAMA Kiyoshi  Nihon University, School of Medicine, Assistant Professor, 医学部, 講師 (00139172)
INOUE Hajime  Nihon University, School of Medicine, Assistant Professor, 医学部, 講師 (60193603)
茂木立 学  日本大学, 医学部, 助手 (50366598)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordsnasal epithelium injury / primary cytokine / nitrotyrosine / iNOS mRNA / xanthine oxidase mRNA / superoxide dismutase / nitrotyrosine / primary cytokines / 粘膜上皮細胞 / inducible nitric oxide thyntase / xanthineoxidase / IL1 β / IFN-γ / TNF-α
Research Abstract

NO-superoxide system is a defensive system to protect against various pathogens by injurious peroxynitrite that is produced in the system when NO reacts with superoxide, and it attacks tyrosine residues resulting in forming nitrotyrosine. Nasal mucosal epithelial cells were separated from mucosal specimen, which was obtained during nasal operations, and cultured with epidermal growth factor for one week or more periods, exchanging culture medium every two days. The cultured human nasal epithelial cells were challenged with cytomix (the mixture of 10ng/mL IL-β, 10ng/mL TNF-α and 10ng/mL IFN-γ), and mRNAs of NO-superoxide system related enzymes were studied by real time-PCR. As the results, the primary cytokines significantly induced iNOS mRNA, xanthine oxidase mRNA and also COX-2 mRNA. The nasal mucosal specimen were immediately fixed in 4% paraform aldehyde in 0.1M PBS, pH 7.5, and thin specimens from the paraffin blocks were studied for immunoreactivities for iNOS, xanthine oxidase, superoxide dismutase, and nitrotyrosine. The epithelial cells and inflamed cells of nasal polyps showed imnunoreactivity for iNOS, nitrotyrosine, superoxide dismutase and xanthine oxidase. Otherwise, of inferior turbinate mucosal gland cells, epithelial cells and inflamed cells showed immunoreactivity for iNOS, nitrotyrosine, superoxide dismutase and xanthine oxidase. A part of nitrotyrosine positive cells were swollen showing morphological change suggesting cell injury, although nitrotyrosine positive cells without morphological alteration suggesting a certain dysfunctions.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (2 results)

All 2005

All Journal Article (2 results)

  • [Journal Article] Nitrotyrosine in otitis media with effusion.2005

    • Author(s)
      Hisamatsu K, Inoue H, Makiyama K, Honmma M
    • Journal Title

      Annals of Otology, Rhinology and Laryngology 114(10)

      Pages: 804-808

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Nitrotyrosine in otitis media with effusion.2005

    • Author(s)
      Hisamatsu K, et al.
    • Journal Title

      Annals of Otology, Rhinology and Laryngology 114(10)

      Pages: 804-808

    • Related Report
      2005 Annual Research Report

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

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