MHC I类贩运信号通过使用人工抗原呈现细胞改善了细胞毒性T淋巴细胞的诱导
Kenta Sasaki1,2, Kenji Murata1, Tomoyuki Minowa1,3
1Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, 060-8556, Japan.
Biochemistry and biophysics reports
|March 6, 2025
概括
人工抗原呈现细胞 (aAPC) 通过信号-MHC I类贩运信号 (SP-MITD) 融合基因进行工程,显著增强细胞毒性T淋巴细胞 (CTL) 诱导. 这种新的方法改善了对已知和未知的抗原的T细胞刺激.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物技术是生物技术.
背景情况:
- 诱导抗原特异性细胞毒性T细胞 (CTLs) 是困难的,因为在维持抗原呈现细胞 (APC) 质量方面存在挑战.
- 来自K562细胞的人工抗原呈现细胞 (aAPC) 用于T细胞刺激,但脉冲aAPC需要先确定抗原.
- 在aAPC中过度表达抗原基因为发现未知的抗原提供了潜在的策略.
研究的目的:
- 评估抗原基因过度表达aAPCs诱导CTLs的疗效.
- 通过评估与MHC I类贩运信号 (MITD) 序列 (SP-MITD) 融合的信号 (SP) 来提高抗原呈现效率.
- 为了比较使用脉冲aAPCs的CTL诱导,使用没有SP-MITD的迷你基因过度表达aAPCs,以及使用SP-MITD的迷你基因过度表达aAPCs.
主要方法:
- 将SP-MITD与表位体 (新抗原AKF9,病毒抗原CMVpp65) 融合成K562衍生的aAPCs的转导.
- 脉冲的aAPCs和过度表达基因的aAPCs (有或没有SP-MITD) 之间的CTL诱导效率的比较.
- 使用抗原基因过度表达aAPCs来识别未知的抗原性的T细胞刺激的评估.
主要成果:
- 使用SP-MITD和抗原基因融合 (SP-MITD (+)) 设计的aAPC显示出优异的CTL诱导效率.
- SP-MITD (+) aAPC的表现优于脉冲aAPC和过度表达没有SP-MITD的迷你基因的aAPC (SP-MITD (-)).
- 由SP-MITD促进的增强抗原呈现显著提高了T细胞刺激.
结论:
- 抗原基因融合SP-MITD转导的aAPCs对于诱导CTLs非常有效.
- 这种方法适用于诱导特定于已知和未知的抗原的CTL.
- 该SP-MITD战略代表了基于T细胞的免疫疗法和疫苗开发的有希望的进步.
相关概念视频
Antigens Involved in Adaptive Immunity
434
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...
434
Antigen Processing Pathways
879
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...
879
Cytotoxic T Cells-mediated Immune Response
825
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...
825
T Cell Activation and Clonal Selection
622
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...
622
Cell-mediated Immune Responses
66.6K
Overview
66.6K
Antigen Presenting Cells
1.6K
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...
1.6K


