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2022 Fiscal Year Final Research Report

Basic study for tolerance induction using 1BS-18 wheat in the patients with wheat-dependent exercise-induced anaphylaxis

Research Project

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Project/Area Number 20K08802
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionShimane University

Principal Investigator

Morita Eishin  島根大学, 医学部, 客員研究員 (90182237)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords小麦依存性運動誘発アナフィラキシー / オメガ5-グリアジン / 低アレルゲン小麦 / 耐性獲得 / 根治療法
Outline of Final Research Achievements

As a basic study to develop a tolerance for wheat allergy in adults, wheat allergen-specific IgE test and basophil activation test were investigated before and after continuous consumption of wheat strain 1 BS -18 bread lacking major wheat allergen omega 5-gliadin for 3 months. There was no significant reduction in either test. However, in a rat wheat allergy model, it was found that continuous intake of 1 BS -18 gluten in advance prevented sensitization by the administration of gluten of normal wheat or omega 5-gliadin. This indicates that T cell epitope of omega 5-gliadin in 1 BS -18 gluten is sufficient for the induction of tolerance.

Free Research Field

アレルギー学

Academic Significance and Societal Importance of the Research Achievements

小麦は成人の食物アレルギーでは頻度の高い原因食品で、多くが重篤な小麦依存性運動誘発アナフィラキシーとなる。小麦アレルギー患者は小麦摂取制限や食後の運動制限を強いられることになり、QOLが著しく低下している。申請者らは、小麦依存性運動誘発アナフィラキシーの主要アレルゲンであるω-5グリアジンを欠失したChinese Spring 1BS-18小麦系統を見出し、小麦依存性運動誘発アナフィラキシー患者が1BS-18系統の小麦を一定量継続摂取できることを確認した。さらにラットの小麦アレルギーモデルで、1BS-18小麦を継続摂取することで耐性を獲得する可能性を示した。

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Published: 2024-01-30  

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