与HLA-DR分子的不变链关联抑制了免疫原性结合
1Department of Microbiology and Immunology, Duke University Medical Center, Durham, North Carolina 27710.
Nature
|June 14, 1990
概括
不变 (I) 链在它们的运输早期阻止类与人白细胞抗原-DR (HLA-DR) 分子的结合. 然而,成熟的HLA-DR分子有效地结合,保持MHC类I和II分子的独特功能.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 二级主要基因相容性复合体 (MHC) 分子为T淋巴细胞呈现,来自细胞外抗原.
- 第I类MHC分子含有来自细胞内蛋白质的.
- 第二类MHC分子与内质网中的不变 (I) 链结合,该链在细胞表面表达之前被移除.
研究的目的:
- 调查不变 (I) 链在与II类MHC分子结合中的作用.
- 为了确定不变 (I) 链是否阻止与HLA-DR分子的结合.
主要方法:
- 研究了不变 (I) 链相关HLA-DR5分子的结能力.
- 使用了一种具有良好特征的流感血氨酸衍生物 (HAp).
主要成果:
- 成熟的HLA-DRαβ二聚体有效地结合了流感血凝衍生的.
- 不变 (I) 链相关的HLA-DR分子不会与结合.
结论:
- 不变的 (I) 链抑制类与II类MHC分子的结合.
- 这种抑制可能维持了I类和II类MHC通路之间的功能区别.
- 对II类MHC分子的结发生在运输通路的晚期,可能发生在内体区.
相关概念视频
Cell-mediated Immune Responses
Overview
Antigens Involved in Adaptive Immunity
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 reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...


