• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Prevention of mite allergy by oral administration of Lactobacillus transformed with expression vector carrying Derf2-cDNA.

Research Project

Project/Area Number 09670471
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 内科学一般
Research InstitutionTokyo National University of Fine Arts and Music

Principal Investigator

SUKO Matsunobu  Tokyo National University of Fine Arts and Music Health Service Center, 保健管理センター, 教授 (80107622)

Co-Investigator(Kenkyū-buntansha) DOHI Makoto  University of Tokyo, Faculty of Medicine, 医学部付属病院, 助手 (60222155)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1998: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1997: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordsmite allergy / oral tolerance / Lactobacillus / Derf2 / IgE / Derf2cDNA / IgE / Derf2 cDNA / Der fII cDNA / IgE抗体
Research Abstract

To prevent the development of mite allergy we tried to induce immune tolerance to mite allergy in mice by oral administration of heat-treated E.coli or alive lactobacillus lactis(LL) which were transformed to express Derf2 protein. Derf2-cDNA library was expressed in E.coli or LL employing an expression vector pUEX1. The clones were screened colony immunoassay employing rabbit anti-Derf2 antibody . C57BL or A/J mice were given orally Derf2- expressing or non-expressing microorganisms (10^9/day) or PBS only for 10 days. Then mice were immunized i.p. with recombinant Derf2 and boosted at 28th day. Bloods were collected at the booster day and 56days after the first immunization. IgE, IgG and IgG1 antibody titer were assayed by ELISA method. Unexpectedly, an oral administration of Derf2 protein expressing E.coli enhanced antibody formation, especially IgE in mice. Adjuvant activity of E.coli was likely due to its LPS or other cell- wall substances. E.coli was suggested to be inappropriate for oral administration, On the other hand, Derf2 expressing LL did not show any change in the antibody formation among IgE, IgG and IgG1. In the present study we could not succeed in inducing the oral tolerance in mice. One of problems was a small amount of the expression of Derf2 protein in lactobacillus. At present we investigate the proper kinds of lactobacillus, expression vectors and the insertion conditions of Derf2-cDNA.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] Yasue M., . , Suko M.: "Inhibition of airway inflammation in rDerf2-sensitized mice by oral administration of recombinant Derf2." Cell. Immunol.181. 30-37 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yasue M., . ,Suko M.: "Effect of oral hyposensitization with recom-Binant Derf2 on immediate airway constricTion in a murine allergic model." Eur.Respi.J.11. 144-150 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi