ヘンドラウイルスとニパウイルス受容体結合タンパク質の様々な部位を認識する抗体による強力なヘニパウイルス中和
Jinhui Dong1, Robert W Cross2, Michael P Doyle3
1The Vanderbilt Vaccine Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
Cell
|December 11, 2020
まとめ
研究者らはヒトの単一クローン抗体を発見し,ヘンドラウイルスとニパウイルスを中和させました. この強力な抗体であるHENV-26とHENV-32は 致命的なニパウイルス感染からフェレットを保護し 新しい治療法やワクチンの開発に希望を与えています
科学分野:
- ウイルス学
- 免疫学
- 構造生物学
背景:
- ヘンドラウイルス (HeV) とニパウイルス (NiV) は高度に病原性のある新興動物性ウイルスです.
- ヘニパウイルスは重度の呼吸器疾患や神経疾患を引き起こし,ヒトでは高い死亡率を呈する.
研究 の 目的:
- HeV受容体結合タンパク質 (RBP) を標的にする自然に発生するヒトモノクローナル抗体 (mAbs) を特定し,特徴づけること.
- これらのmAbsの中和能力と,HeVとNiVの感染に対する保護効果を評価する.
主な方法:
- HeV-RBPに対するヒトmAbsの分離と特徴付け
- ウイルス中和検査とエピトープ分類実験
- X線結晶学を用いたmAb-RBP複合体の構造分析
- NiV感染のフレットモデルにおける in vivo 効果試験
主要な成果:
- ヒトのmAbsの発見は,HeVを中和し,NiVを中和するものを発見しました.
- HeV-RBPの5つの主要な抗原部位を特定する.
- mAbs HENV-26とHENV-32による致命的なNiV感染に対する保護の実証
- 抗体結合とウイルス阻害メカニズムに関する構造的洞察
結論:
- HeVとNiV RBPsの保存された脆弱性を標的とした強力なヒトmAbsが特定されています.
- これらのmAbsはヘニパウイルス感染症に対する予防薬として有望である.
- 特定されたエピトープは,次世代のワクチンの合理的な設計に価値があります.
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