非结构蛋白1在登革热病毒复制和免疫调节中的作用 in vivo
Kazi Anowar Hossain1, Bouchra Kitab1, Risa Kono2
1Transboundary Animal Diseases Center, Joint Faculty of Veterinary Medicine, Kagoshima University.
The Journal of veterinary medical science
|November 24, 2025
概括
登革热病毒非结构蛋白1 (NS1) 增强病毒复制并调节体内免疫反应. 这项研究表明,NS1在小鼠中促进登革热病毒 (DENV) 感染,突出其在疾病发病过程中的作用.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
背景情况:
- 登革热病毒 (DENV) 是一个重要的全球健康威胁,在热带和亚热带地区引起流行病.
- DENV非结构蛋白1 (NS1) 对于病毒复制和致病性至关重要,它调节宿主-病原体相互作用.
研究的目的:
- 研究DENV NS1对病毒感染和宿主免疫反应的体内影响.
- 为了确定NS1表达或给药是否增强DENV复制并改变细胞因子概况.
主要方法:
- 在AG129小鼠中使用表达DENV NS1 (rDIs-DENV2C-NS1) 的复合疫苗病毒进行免疫.
- 挑战免疫小鼠DENV2C和评估病毒载荷 (血清,肝脏).
- 在DENV2挑战之前给小鼠服用重组NS1蛋白,以评估对病毒复制和宿主细胞因子 (IL-3,IL-13,IL-18,M-CSF) 的直接影响.
主要成果:
- 用rDIs-DENV2C-NS1免疫的小鼠在DENV2感染后显示血清和肝脏病毒载荷增加.
- 用重组NS1蛋白直接治疗显著增强了血清,肝脏和脏中的病毒复制.
- 治疗NS1导致血清细胞因子IL-3,IL-13,IL-18和M-CSF的剂量依赖上调.
结论:
- 在体内,DENV NS1蛋白具有免疫调节作用.
- NS1促进DENV复制,在感染期间有助于增强病毒载荷.
- 这些发现强调了NS1在DENV病变发生过程中的关键作用.
更多相关视频
06:00Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection
Published on: January 26, 2024
2.0K
08:36Measuring Dengue Virus RNA in the Culture Supernatant of Infected Cells by Real-time Quantitative Polymerase Chain Reaction
Published on: November 1, 2018
32.5K
相关概念视频
02:28Leaky Scanning
5.6K
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...
5.6K
00:56Viral Structure
73.7K
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.
73.7K
02:30siRNA - Small Interfering RNAs
18.3K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
18.3K
01:29Viruses with RNA Genomes
765
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
765
01:29Immune Response Against Viral Pathogens
1.7K
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
1.7K