関連する実験動画
Updated: Dec 21, 2025

13:00
Engineering Antiviral Agents via Surface Plasmon Resonance
Published on: June 14, 2022
2.6K
非競合するヒト中和抗体のペアは,COVID-19ウイルスの受容体ACE2への結合を阻害する
Yan Wu1,2, Feiran Wang3,4, Chenguang Shen3,5
1Department of Pathogen Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China. wuy@biols.ac.cn gaofeng@tib.cas.cn gaof@im.ac.cn liulei3322@aliyun.com.
まとめ
4つのヒト単一クローン抗体が分離され,B38とH4はSARS-CoV-2のスパイクタンパク質とACE2の結合を阻害した. これらの中和抗体は,COVID-19の治療法とワクチンの設計において有望である.
科学分野:
- 免疫学
- ウイルス学
- 構造生物学
背景:
- 中性化抗体は,新型コロナウイルス感染症2019 (COVID-19) の潜在的な抗ウイルス戦略である.
- 有効な中和抗体を特定することは,効果的なCOVID-19治療薬の開発に不可欠です.
研究 の 目的:
- SARS-CoV-2に対する中和活性を持つヒト単一クローン抗体を分離し,特徴づけること.
- 有望な抗体候補の 中和化メカニズムを調査する.
- これらの抗体の治療的可能性を臨床前モデルで評価する.
主な方法:
- 回復中のCOVID-19患者からの単一クローン抗体の分離.
- SARS-CoV-2のスパイクタンパク質受容体結合領域 (RBD) との抗体の相互作用を評価するための結合測定法.
- 抗体エピトープ結合を決定する競争分析.
- COVID-19のマウスモデルでの治療効果の研究.
- 抗体とRBDの相互作用の構造的基礎を決定するX線結晶学.
主要な成果:
- 中和化能力を持つ4つのヒト単一クローン抗体が分離されました.
- 抗体B38とH4は,ウイルスのRBDとヒトのACE2受容体の相互作用を阻害することが判明しました.
- 競合アッセイでは,B38とH4のRBDの異なるエピトープが示されました.
- これらの抗体を治療的に投与すると,感染したマウスの肺におけるウイルスの位数は減少した.
- 構造分析により,B38エピトープがRBD-ACE2結合インターフェースと重なり合っていることが示された.
結論:
- 人間の単一クローン抗体,特にB38およびH4は,RBD-ACE2の相互作用を阻害することによって,SARS-CoV-2に対する強力な中和活性を示しています.
- B38とH4の標的となる独特のエピトープは,免疫脱出を克服する組み合わせ療法の可能性を示唆する.
- これらの発見は,COVID-19に対する抗体ベースの治療法の開発を支援し,合理的なワクチン設計の洞察を提供します.
さらに関連する動画
関連する概念動画
Antibody Actions
2.2K
Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
2.2K
Cross-reactivity
32.7K
Overview
32.7K
Drug-Receptor Interaction: Antagonist
4.5K
An antagonist is a drug that binds strongly to a receptor without activating it. An antagonist prevents other molecules, such as neurotransmitters or hormones, from binding to the receptor and triggering a cellular response. Such interaction effectively hinders the normal physiological processes mediated by the receptor, resulting in various pharmacological effects depending on the specific receptor targeted.
Antagonists can be classified as competitive or noncompetitive based on their...
Antagonists can be classified as competitive or noncompetitive based on their...
4.5K
Combined Effects of Drugs: Antagonism
11.3K
The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
11.3K
Nondepolarizing (Competitive) Neuromuscular Blockers: Mechanism of Action
2.6K
Nondepolarizing neuromuscular blockers induce paralysis by competitively blocking nicotinic acetylcholine receptors at the muscle end plate. Examples include pancuronium, mivacurium, vecuronium, and rocuronium. These quaternary ammonium derivatives are administered intravenously, are poorly absorbed, and are excreted via the kidneys.
Competitive antagonists prevent acetylcholine from binding to its receptor, inhibiting membrane depolarization. Without conformational changes or intrinsic...
Competitive antagonists prevent acetylcholine from binding to its receptor, inhibiting membrane depolarization. Without conformational changes or intrinsic...
2.6K
Nondepolarizing (Competitive) Neuromuscular Blockers: Pharmacological Actions
795
Nondepolarizing neuromuscular blockers prevent the membrane depolarization of muscle cells and inhibit muscle contraction. These are usually administered with anesthetics to achieve complete muscle relaxation. Upon administration, these drugs first block the small, rapidly contracting muscles of the face and hands, followed by the larger muscles of the trunk and the intercostal muscles. The diaphragm is the last muscle to be affected.
Although all competitive neuromuscular blockers are designed...
Although all competitive neuromuscular blockers are designed...
795

