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2021 Fiscal Year Final Research Report

The impact of complement in blistering formation of pemphigoid

Research Project

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Project/Area Number 19K08786
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53050:Dermatology-related
Research InstitutionHokkaido University

Principal Investigator

Iwata Hiroaki  北海道大学, 大学病院, 講師 (20397334)

Co-Investigator(Kenkyū-buntansha) 西江 渉  北海道大学, 医学研究院, 客員教授 (20443955)
氏家 英之  北海道大学, 大学病院, 講師 (60374435)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords水疱性類天疱瘡 / 17型コラーゲン / 補体 / 自己抗体 / Fc結合タンパク
Outline of Final Research Achievements

The inflammation caused by complement is thought to be essential for the blistering mechanism of bullous pemphigoid. However, we have previously shown the complement independent blstering mechanism. At this study, we found that C1q which is a component of comlement systems enhaces the endocytosis of BP180 after binding BP-IgG to BP180 using cell culture system. In additon, keratinocytes stimulated with BP-IgG produced C1q from from keratinocytes and enhaced the endocytosis of BP180. Based on these results, we think that the complement may directly modulate the pathogenicity of BP-IgG autoantibody. In addition, complement ennhance the severity of buloous pemphigid though the inflammation.

Free Research Field

皮膚科

Academic Significance and Societal Importance of the Research Achievements

水疱性類天疱瘡の治療は、根本原因となる自己抗体を減らすことを目的とした治療戦略が主体である。今回の研究成果は、単なる免疫抑制による自己抗体の抑制のみでなく補体を治療ターゲットとした新たな治療選択肢の可能性が広がる。免疫抑制治療は、しっかり使うことで有効性は期待できるが副作用も比較的多い治療である。補体などFc結合タンパクによる抗体の性質変化を抑制する治療法は新しい治療ターゲットとなりうる可能性があり、副作用も軽減できることが期待される。

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Published: 2023-01-30  

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