生体内での病原性抗体の人工シアリレーションは,自己免疫疾患を弱める
Jose D Pagan1, Maya Kitaoka1, Robert M Anthony1
1Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129, USA.
Cell
|December 26, 2017
まとめ
研究者は自己反応性抗体 (IgG) を 抗炎症剤に変える酵素を設計しました このグリコエンジニアリングのアプローチは 免疫性炎症を in vivoで成功裏に軽減し 新しい治療戦略を提供しました
科学分野:
- 免疫学
- グライコバイオロジー
- 自己免疫 疾患
背景:
- 自己反応性免疫グロブリンG (IgG) 抗体は,狼や関節リウマチなどの自己免疫疾患を誘発する.
- 高用量静脈注射免疫グロブリン (IVIG) は逆説的に炎症を治療し,その有効性はFcグリカンシアライゼーションに関連しています.
- 抗体が炎症を促すか抑えるかを決定する.
研究 の 目的:
- 内生性IgGのインビヴォ・グリコエンジニアリングの治療の可能性を調査する.
- 病原性,自己反応性IgGを抗炎症メディエーターに変換する.
主な方法:
- 溶解性グリコシルトランスフェラーゼをIgG Fcグリカンにガラクトースまたはシアル酸を結合させるように設計した.
- これらの酵素は,自己免疫性炎症の動物モデルで予防および治療的に投与された.
- DC-SIGN,STAT6,FcγRIIBを含む下流信号経路を調査した.
主要な成果:
- この2つの酵素の予防と治療は,体内の自己免疫性炎症を著しく弱めた.
- 設計されたIgGの抗炎症経路はIVIGの経路を模倣し 特定の免疫受容体とシグナル分子を必要としています
- 炎症部位における病原性IgGに対するシアリレーションは,局所的な血小板由来核酸糖ドナーによって促進された.
結論:
- 内生性IgGのイン・ビヴォ・グリコエンジニアリングは,自己免疫疾患の有望な治療戦略です.
- 病原性IgGの標的化により,その機能が炎症促進から抗炎症に変換される.
- このアプローチは,免疫媒介疾患の治療のために抗体グリコシレーションを操作する可能性を強調しています.
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