SARS-CoV-2の突然変異がウイルス感染性と抗原性に与える影響

Qianqian Li¹, Jiajing Wu², Jianhui Nie²

¹Division of HIV/AIDS and Sex-Transmitted Virus Vaccines, Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC) and WHO Collaborating Center for Standardization and Evaluation of Biologicals, No. 31 Huatuo Street, Daxing District, Beijing 102629, China; Graduate School of Peking Union Medical College, No. 9 Dongdan Santiao, Dongcheng District, Beijing 100730, China.

Cell

|July 31, 2020

まとめ

SARS-CoV-2のスパイクタンパク質変異は,感染性と抗体耐性に影響します. 抗体中和の有効性に影響を与える特定の変異により,グリコシレーションはウイルスの感染性にとって極めて重要です.

科学分野:

ウイルス学
免疫学
分子生物学

背景:

SARS-CoV-2のスパイクタンパク質は高度にグリコシル化され,突然変異を起こす可能性があります.
これらの変化を理解することは効果的なワクチンや治療薬の開発に不可欠です

研究の目的:

SARS-CoV-2のスパイクタンパク質変異とグリコシル化部位の変化の生物学的重要性を調査する.
抗体と回復期血清によるウイルス感染性と中和への影響を評価する.

主な方法:

スパイクタンパク質の80の変種と26のグリコシル化部位の変化の分析
中和抗体と患者の血清に対する感染性と反応性の評価

主要な成果:

D614G変異と特定の組み合わせの変異は,感染性の有意な増加を示した.
受容体結合ドメインの変種はしばしば感染性を低下させましたが,抗体耐性を与えるものもあります (例えば,A475V,L452R).
N331とN343の欠失が劇的な効果を示した. N234Qは抗体抵抗性を高め,N165Qは感受性を高めました.

結論:

スパイクタンパク質の変異とグリコシレーションパターンは,SARS-CoV-2の感染性と免疫回避に大きく影響します.
特定のグリコシレーション部位はウイルスの感染性にとって不可欠です.
発見は,次世代ワクチンとSARS-CoV-2を標的とした治療抗体を設計するための洞察を提供します.

キーワード:

コロナウイルス SARS-CoV-2についてグライコシレーションミュータント偽型ウイルススパイクバリアント

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