在模型中没有证据表明人类多克隆SARS-CoV-2抗体增强了疾病
Douglas S Reed1,2, Anita K McElroy1,3, Dominique J Barbeau1,3
1Center for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
PloS one
|June 20, 2024
概括
这项研究表明,子是轻度COVID-19的良好模型. 它还发现,特定抗体不太可能恶化SARS-CoV-2疾病.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 动物模型 动物模型
背景情况:
- SARS-CoV-2 的出现引起了人们对抗体依赖增强 (ADE) 的担忧,这种现象在其他冠状病毒中也被观察到.
- 开发可靠的动物模型对于理解SARS-CoV-2病原体和评估潜在治疗方法至关重要.
研究的目的:
- 为了建立SARS-CoV-2感染的模型.
- 评估使用特定的IgG抗体 (SAB-185) 的SARS-CoV-2疾病抗体依赖增强 (ADE) 的潜力.
主要方法:
- 子通过粘膜注射或吸入感染了SARS-CoV-2,以建立疾病模型.
- 在被挑战SARS-CoV-2之前,小鹿组接受了人类多克隆抗SARS-CoV-2IgG (SAB-185) 的静脉注射剂量.
- 在抗体治疗和对照组中评估了临床症状,病毒分泌和肺部病理.
主要成果:
- 模型表现出轻微的症状,包括发烧和体重减轻,检测到7-10天的病毒泄漏.
- 在SAB-185和对照组治疗的子之间,没有观察到发烧,体重减轻或病毒分泌的显著差异.
- 虽然感染的肺病理存在,但在接受抗体治疗的组中没有发现增强.
结论:
- 健康的成年作为研究轻度COVID-19的合适模型.
- 低剂量的特定IgG抗体SAB-185不太可能导致SARS-CoV-2疾病的抗体依赖增强.
更多相关视频
10:25Detection of SARS-CoV-2 Neutralizing Antibodies using High-Throughput Fluorescent Imaging of Pseudovirus Infection
Published on: June 5, 2021
4.6K
08:21Cell-Free Dot Blot as a Practical and Adaptable Immunoassay Platform for the Detection of Antibody Response in Human and Animal Sera
Published on: May 23, 2025
202
相关概念视频
Viral Mutations
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Conjugated Proteins
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Single Nucleotide Polymorphisms-SNPs
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
Cytomegalovirus Disease
Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
Coronavirus
Coronaviruses, including the severe acute respiratory syndrome coronavirus (SARS-CoV), are enveloped viruses characterized by their single-stranded, positive-sense RNA genome and helical nucleocapsid structure. The hallmark of these viruses is their club-shaped spike (S) glycoproteins that protrude from the viral envelope, facilitating attachment to host cells. Typically, coronaviruses infect the upper respiratory tract, often causing mild or asymptomatic disease. However, certain strains like...
