相关实验视频

Updated: Feb 21, 2026

Rescue of Recombinant Newcastle Disease Virus from cDNA

Rescue of Recombinant Newcastle Disease Virus from cDNA

Published on: October 11, 2013

两种自然重组分离的禽流感的遗传演变和病原性分析

Shihong Yan¹, Chenqi Hu¹, Hongyang Li¹

¹Fujian Province Joint Laboratory of Animal Pathogen Prevention and Control of the "Belt and Road", College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, China; Key Laboratory of Animal Pathogen Infection and Immunology of Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, China; Key laboratory of Fujian-Taiwan Animal Pathogen Biology, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Poultry science

|February 19, 2026

概括

禽流感病毒 (AIV) 的H6和H9亚型活跃地重新组合,显示出跨物种的适应性. 持续监测对于管理这些正在演变的低致病性禽流感病毒所带来的动物和公共卫生风险至关重要.

科学领域:

病毒学病毒学
分子生物学分子生物学
公共卫生公共卫生

背景情况:

禽流感病毒 (AIV) 的重新分类推动了病毒的进化,遗传多样性和宿主范围的扩张.
低致病性H6和H9亚型的禽流感病毒 (LPAIV) 普遍存在,并且具有显著的重组潜力.

研究的目的:

从中国福建的家禽中分离和描述H6和H9亚型LPAIVs.
调查这些LPAIV菌株的重组潜力,细胞系复制和动物病原性.
评估与H6和H9 LPAIVs相关的跨物种适应性和潜在的健康风险.

主要方法:

从家禽中分离和描述H6和H9LPAIV.
病毒基因段的遗传学分析.
在鸟类和哺乳动物细胞系中进行复制效率评估.
在,和老鼠身上进行动物感染实验.

主要成果:

分离了两个H6N2-C5和七个H9N2-C1LPAIV;H6N2-C5和H9N2-C1共享了七个基因段,在HA基因上有所不同.
遗传学分析显示了不同的H6和H9血统,与疫苗菌株有所不同.
这两种病毒都在多个细胞系中有效地复制,并在动物中引起轻度至中度的呼吸道症状.
H6N2-C5在小鼠中表现出更广泛的组织热带性,更高的病毒载荷和神经热带性;同时感染加剧了病理学.

结论:

H6和H9 LPAIV表现出活跃的重组和显著的跨物种适应性.
这些发现强调了需要持续的监测,以减轻对动物和公共健康的潜在威胁.
该研究强调了LPAIVs不断变化的性质及其对疾病控制策略的影响.

关键词:

在 AIVIV AIVIV 跨物种的传播方式.遗传进化的遗传进化致病性致病性致病性进行重新分类.

更多相关视频

Production of High-Titer Infectious Influenza Pseudotyped Particles with Envelope Glycoproteins from Highly Pathogenic H5N1 and Avian H7N9 Viruses

Production of High-Titer Infectious Influenza Pseudotyped Particles with Envelope Glycoproteins from Highly Pathogenic H5N1 and Avian H7N9 Viruses

Published on: January 15, 2020

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Published on: August 2, 2011

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.

Leaky Scanning

Leaky Scanning

During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...