一种由HLA-B*18:01呈现的流感B病毒衍生的特性:
Lawton D Murdolo1,2, Samuel Liwei Leong1,2, Janesha C Maddumage1,2
1Infection and Immunity Program, La Trobe Institute for Molecular Science (LIMS), Victoria, Bundoora VIC, Australia.
The Biochemical journal
|June 30, 2025
概括
在HLA-B*18:01中,B型流感病毒 (IBV) 的呈现很差,与A型流感病毒 (IAV) 不同. 这种呈现的差异解释了为什么IBV不能激活CD8+T细胞,影响疫苗开发.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 结构生物学 结构生物学
背景情况:
- 流感B型病毒 (IBV) 构成全球健康威胁,但与流感A型病毒 (IAV) 相比,研究程度较低.
- CD8+ T 细胞对于控制流感疾病的严重程度至关重要.
- IAV和IBV表位体之间的T细胞交叉反应是疫苗开发的潜在途径.
研究的目的:
- 通过人类白细胞抗原 (HLA) -B*18:01.01研究IBV衍生的 (PB1177-B) 的呈现.
- 了解为什么这种IBV不能引起CD8+T细胞反应,与其IAV对应物 (PB1177-A) 不同.
主要方法:
- 细胞内细胞因子染色试验以评估CD8+T细胞激活.
- 基于晶体结构的分子动力学分析,以比较-HLA复合物的稳定性和构造.
主要成果:
- IBVPB1177-B没有激活HLA-B*18:01+个体中的CD8+T细胞.
- 结构分析显示,HLA-B*18:01-PB1177-B复合体比HLA-B*18:01-PB1177-A复合体不那么稳定,更灵活.
- IBV呈现出一个柔性中心区域,具有疏水性补丁,可能阻碍T细胞受体结合.
结论:
- -HLA复合物的稳定性和形状的差异显著影响T细胞的识别.
- HLA-B*18:01对IBVPB1177-B的表现和稳定性不佳解释了CD8+T细胞激活的缺乏.
- 这些发现突显了IAV和IBV特异性CD8+T细胞反应之间的关键区别,为未来的疫苗策略提供了信息.
更多相关视频
13:41Use of Interferon-γ Enzyme-linked Immunospot Assay to Characterize Novel T-cell Epitopes of Human Papillomavirus
Published on: March 8, 2012
12.5K
10:37Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
Published on: October 20, 2021
3.0K
相关概念视频
02:28Leaky Scanning
5.2K
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...
5.2K
01:26Antigens Involved in Adaptive Immunity
695
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
695