基因组多样性和拉萨病毒的进化理解:一种整体方法,突出了跨血统疫苗开发的潜在目标
Moshood Olamide Lateef1, Abideen Titilope Aransi2,3, Dauda Nathaniel4
1Virology and Molecular Diagnostics Unit, International Institute of Tropical Agriculture, Ibadan, Nigeria. m.lateef@cgiar.org.
Archives of virology
|November 24, 2025
概括
这项研究使用精确的序列分析了拉萨病毒 (LASV) 的遗传多样性,揭示了VI系可能具有祖先特征. 这种血统被提出为广泛保护的LASV疫苗的潜在目标.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 之前的拉萨病毒 (LASV) 遗传多样性研究受限于未确定序列中的核酸.
- 准确的基因分析对于理解LASV演变和疫苗开发至关重要.
研究的目的:
- 通过分析没有未确定核酸的开放读取框架 (ORF) 序列,准确评估 LASV 的遗传多样性.
- 根据遗传和抗原性质,识别基于广泛保护的LASV疫苗的潜在目标.
主要方法:
- 对 LASV 开放式读取 (ORF) 序列的分析,不包括具有未确定核酸的序列.
- 对于聚合酶,核蛋白 (NP) 和糖蛋白 (GP) 基因的对对同一性的计算.
- 遗传学分析,将LASV菌株分类为血统,并评估进化关系.
- 将GP基因的多个序列对齐以识别独特的插入,并预测抗原性,过敏性和毒性.
主要成果:
- 观察到高对称性:聚合酶 (≥68%),NP (≥74%) 和GP (≥75%).
- 拉斯维菌株分为七个族系;第六个族系 (KAK-428) 与所有其他族系表现出基因相关性,表明祖先特征和与动物宿主Hylomyscus pamfi.
- 在IV和V系中发现了GP基因中独特的编码子插入,与其他系相比,预测抗原性较低. 所有代表都预测非过敏性和无毒性,B细胞和T细胞表位保留.
结论:
- 血统VI (KAK-428) 表现出潜在的祖先特征,并且在遗传学上具有重要意义.
- 观察到的遗传分歧,抗原变异和保存的表观点表明VI系是广谱LASV疫苗开发的有希望的候选人.
更多相关视频
06:02Arbovirus Infections As Screening Tools for the Identification of Viral Immunomodulators and Host Antiviral Factors
Published on: September 13, 2018
7.3K
05:15Detection of Neutralization-sensitive Epitopes in Antigens Displayed on Virus-Like Particle VLP-Based Vaccines Using a Capture Assay
Published on: February 10, 2022
4.1K
相关概念视频
00:42Cross-reactivity
32.7K
Overview
32.7K
00:36Viral Mutations
39.5K
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...
39.5K
00:57Viral Recombination
24.8K
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.
24.8K