相关实验视频

Updated: Jun 10, 2026

An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection

An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection

Published on: December 10, 2013

使用基于结构的机器学习模型来设计呼吸道同位素病毒疫苗

Thomas C McCarty¹, Iosif I Vaisman²

¹RNA Viruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD 20892, USA.

|June 27, 2024

概括

研究人员使用计算方法来识别呼吸道同胞病毒 (RSV) 非结构蛋白1 (NS1) 的突变,用于疫苗开发. 这些突变减少了病毒复制和增强宿主免疫反应,为更安全的活体减弱RSV疫苗铺平了道路.

科学领域:

病毒学病毒学
疫苗开发疫苗开发
结构生物学结构生物学

背景情况:

针对呼吸道同胞病毒 (RSV) 的活衰减疫苗需要突变,以减少病毒复制,同时保持免疫性.
目前用于识别减弱突变的方法包括生物选择和逆基因操纵.
平衡减少复制和抗原表达对于有效的活体减弱疫苗候选人至关重要.

研究的目的:

探索一种新的计算方法来发现RSV中的减弱突变.
为了确定RSV非结构蛋白1 (NS1) 中的特定氨基酸替代物,这些替代物会扰乱其结构和功能.
评估这些突变对病毒复制和宿主免疫反应的影响.

主要方法:

利用蛋白质结构建模和机器学习来预测RSV NS1中的破坏稳定的氨基酸替代.
引入了12个预测的突变,成为传染性RSV.
在细胞培养中分析突变病毒对病毒基因表达,宿主干扰素和细胞因子产生以及亡的影响.

主要成果:

基于结构的预测成功地发现了导致不同程度NS1功能丧失的突变.
突变病毒在对干扰素有竞争力的细胞中表现出减少的多循环复制.
观察到病毒mRNA和蛋白质表达的减少,以及干扰素和亡反应的增加.

结论:

对NS1结构不稳定的计算预测是发现减弱突变的可行策略.
鉴定到的突变减少了病毒复制,并增强了宿主抗病毒和亡反应,这是活体减弱疫苗开发的关键属性.
这种基于结构的方法为产生更安全,更有效的RSV疫苗候选人提供了一个有希望的途径.

关键词:

在NS1中,NS1是NS1.病毒蛋白结构的计算分析.计算性突变发生.干扰素对抗剂的干扰素对抗剂活体减弱病毒疫苗设计机器学习是机器学习.对干扰素抗剂的突变分析.负链RNA病毒的病毒.非结构性蛋白质 1 1 呼吸道同胞性病毒病毒蛋白结构的修改是病毒蛋白结构的修改.

更多相关视频

Generation, Amplification, and Titration of Recombinant Respiratory Syncytial Viruses

Generation, Amplification, and Titration of Recombinant Respiratory Syncytial Viruses

Published on: April 4, 2019

Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus

Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus

Published on: July 27, 2021

相关概念视频

Viral Structure

Viral Structure

Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.

Respiratory Syncytial Virus Disease

Respiratory Syncytial Virus Disease

Human respiratory syncytial virus (RSV) is a widespread pathogen that primarily targets infants and young children but also poses a serious health risk to elderly and immunocompromised individuals. Belonging to the Pneumoviridae family, RSV is a negative-sense, single-stranded RNA virus within the Pneumovirus genus. Its global health burden is significant, with millions of cases annually resulting in hospitalizations and mortality, particularly in resource-limited settings. Although most...