马达加斯加新型蝙蝠科布病毒的基因组表征:对病毒进化和动物感染风险的影响
Freddy L Gonzalez1,2, Hafaliana Christian Ranaivoson1,3,4, Angelo Andrianiaina3
1Department of Ecology and Evolution, University of Chicago, IL, United States.
bioRxiv : the preprint server for biology
|January 7, 2025
概括
研究人员在马达加斯加的果蝙蝠便中检测到 kobuvirus RNA. 这一发现突显了蝙蝠作为布病毒的潜在储存库,强调了研究这些肠道病毒对动物传染风险的必要性.
科学领域:
- 病毒学 病毒学
- 基因组学就是基因组学.
- 生态生态学 生态生态学
背景情况:
- 科布病毒 (科 *Picornaviridae*,属 *Kobuvirus*) 是肠道病毒,其进化历史不太清楚,部分原因是野生动物监测有限.
- 蝙蝠是众所周知的动物传播病毒的储存库,但它们的病毒,包括 kobuvirus,在很大程度上仍然没有特征.
- 以前的研究表明,蝙蝠可能是kobuvirus进化的祖先,需要进一步调查.
研究的目的:
- 通过使用元基因下一代测序 (mNGS) 来描述特有,野生捕获的马达加斯加果蝙蝠中的潜在动物性病毒.
- 研究在蝙蝠中检测到的科布病毒的进化历史和潜在的动物性疾病影响.
主要方法:
- 从野生捕获的马达加斯加水果蝙蝠 (*Eidolon dupreanum*) 收集和处理便样本.
- 基因组下一代测序 (mNGS) 的应用用于病毒RNA检测.
- 一个全基因组 kobuvirus序列的遗传学分析.
主要成果:
- 在马达加斯加果蝙蝠的便样本中检测出 kobuvirus RNA.
- 遗传学特征揭示了检测到的 kobuvirus 序列巢穴在 Aichivirus A 类.
- 已知Aichivirus A类病毒会感染各种宿主,包括人类,动物,犬类动物,类动物,鸟类和蝙蝠.
结论:
- 马达加斯加的水果蝙蝠携带着库布病毒,特别是在Aichivirus A类中.
- 这些发现强调了蝙蝠作为多种病毒家族的储存库和动物传播传播的潜在来源的重要性.
- 进一步表征这一 kobuvirus 类对于评估未来的动物感染威胁至关重要,因为它具有重组和跨物种感染的潜力.
相关概念视频
00:36Viral Mutations
32.1K
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...
32.1K
00:57Viral Recombination
23.2K
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.
23.2K
02:33Retroviruses
12.2K
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
12.2K