相关实验视频

Updated: Jun 29, 2025

Utilizing the Antigen Capsid-Incorporation Strategy for the Development of Adenovirus Serotype 5-Vectored Vaccine Approaches

Utilizing the Antigen Capsid-Incorporation Strategy for the Development of Adenovirus Serotype 5-Vectored Vaccine Approaches

Published on: May 6, 2015

通过合并来自不同关注变异的突变来提高SARS-CoV-2疫苗基因的抗原性

Susanne Herwig¹, Julia M Adler², Daria Vladimirova²

¹Department of Gynecology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany.

|March 28, 2024

概括

将不同SARS-CoV-2变异的突变融合到单个尖端疫苗基因中,显著增强了对包括Omicron在内的所有变异的中和免疫力. 这种方法可能会减少针对不断演变的病毒菌株的频繁疫苗更新的需要.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
疫苗开发疫苗开发

背景情况:

引起关注的SARS-CoV-2变种 (VOCs) 的出现一再损害了疫苗的有效性.
目前的疫苗使用来自原始或主导菌株的未经修改的尖峰基因,导致有限的交叉保护.
疫苗基因的频繁适应是必要的,以跟上病毒进化的步伐.

研究的目的:

调查增强尖端疫苗抗原性的策略.
探索将不同VOC的突变融合到单个疫苗基因中的潜力.
评估这种联合疫苗诱导的中和抗体的范围和效力.

主要方法:

设计和构建了新型重组疫苗基因,其中包含了α,β,gamma和deltaVOC的突变.
将这些基因克隆成腺病毒载体用于疫苗输送.
向C57BL/6小鼠注射疫苗,并评估了针对SARS-CoV-2菌株的血清中和抗体反应.

主要成果:

重组疫苗基因结合了多种VOC的突变,显著改善了中和免疫力.
这种增强的免疫力扩展到所有测试的VOC,包括Omicron菌株.
与使用未经修改的尖峰基因的疫苗相比,证明了优越的交叉保护.

结论:

将来自不同SARS-CoV-2VOC的突变融合到单个疫苗基因中,为扩大和改善免疫保护提供了一个有希望的策略.
这种方法有可能减少针对病毒演变所需的疫苗适应频率.
在开发下一代COVID-19疫苗方面取得了重大进展.

关键词:

这是SARS-CoV-2疫苗.交叉保护是指交叉保护.突变是发生在突变中的突变.中和抗体中和抗体.疫苗基因是疫苗的基因.

更多相关视频

Generating Recombinant Avian Herpesvirus Vectors with CRISPR/Cas9 Gene Editing

Generating Recombinant Avian Herpesvirus Vectors with CRISPR/Cas9 Gene Editing

Published on: January 7, 2019

Homogeneous Glycoconjugate Produced by Combined Unnatural Amino Acid Incorporation and Click-Chemistry for Vaccine Purposes

Homogeneous Glycoconjugate Produced by Combined Unnatural Amino Acid Incorporation and Click-Chemistry for Vaccine Purposes

Published on: December 19, 2020

相关概念视频

Viral Mutations

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...

Viral Recombination

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.

Vaccinations

Vaccinations

What is Genetic Engineering?

What is Genetic Engineering?

Mutations

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...

Single Nucleotide Polymorphisms-SNPs

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,...