在DEC205向疫苗下游的树突细胞中,FcRn调节了抗原呈现
Christophe Macri1, Matthew Paxman1, Devi Jenika1
1Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, 30 Flemington Rd, Parkville, The University of Melbourne, Victoria, 3010, Australia.
NPJ vaccines
|April 9, 2024
概括
新生儿Fc受体 (FcRn) 通过通过DEC205受体改善抗原呈现,显著提高树突细胞 (DC) 疫苗的疗效. 这一发现为优化DC向疫苗提供了新的策略.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
背景情况:
- 针对树突细胞 (DC) 的疫苗接种使用单克隆抗体 (mAbs) 传递抗原到特定的DC子集.
- 新生儿Fc受体 (FcRn) 再循环免疫球蛋白G (IgG) 并影响免疫复杂抗原的呈现.
- 在DC向疫苗接种中FcRn的作用在很大程度上仍未被探索.
研究的目的:
- 调查FcRn在DC向疫苗接种策略中的抗原呈现中的作用.
- 确定FcRn对针对DC受体的mAbs介导的抗原呈现的影响,例如DEC205和Clec9A.
主要方法:
- 在常规DC1 (cDC1) 上对针对DEC205和Clec9A的IgG mAbs进行抗原结合.
- 在cDC1.1中评估FcRn表达.
- 对向抗原的MHC I交叉呈现和MHC II呈现的评估.
- 对抗B细胞淋巴瘤抗DEC205疫苗接种疗效的分析.
主要成果:
- FcRn被cDC1高度表达,并显著增强MHC I和MHC II抗原呈现对抗DEC205向疫苗.
- FcRn对抗原呈现的影响是cDC1固有的,对抗B细胞淋巴瘤抗DEC205疫苗的有效性至关重要.
- FcRn对抗Clec9A向疫苗或细胞相关抗原的抗原呈现没有影响.
结论:
- FcRn在基于抗DEC205的DC向疫苗接种的免疫性中发挥着至关重要的,以前未被认可的作用.
- 了解FcRn的功能为改善DC向疫苗开发和结果提供了一个新的目标.
相关概念视频
T Cell Activation and Clonal Selection
716
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
716
Antigen Presenting Cells
1.8K
The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
1.8K
Vaccinations
44.4K
Overview
44.4K
Diversity of Antigen Receptors
581
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
581
Antigen Processing Pathways
1.0K
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...
1.0K
Cytotoxic T Cells-mediated Immune Response
904
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
904


