通过CAR介导的目标识别限制了TCR和CAR双受体编辑T细胞的TCR介导的目标识别
Tassilo L A Wachsmann1, Teuntje Poortvliet1, Miranda H Meeuwsen1
1Department of Hematology, Leiden University Medical Center, 2333ZA Leiden, the Netherlands.
概括
针对多个髓瘤抗原的双重工程T细胞 (TRaCR) 显示双重特异性,但优先参与CAR. 这种CAR偏好可以导致异质多发性骨髓瘤中的瘤细胞存活,因此需要对这种方法保持谨慎.
科学领域:
- 免疫治疗是一种免疫疗法.
- 癌症生物学 癌症生物学
- 细胞工程 细胞工程
背景情况:
- 抗原逃逸限制了工程T细胞疗法的疗效,例如仿真抗原受体 (CAR) 和T细胞受体 (TCR) T细胞.
- 针对多个抗原是一种克服抗原逃逸和扩大治疗点的策略.
- 结合CAR和TCR向,有可能实现更广泛的抗原识别.
研究的目的:
- 在T细胞中使用结合的TCR和CAR工程来研究双抗原特异性的可行性.
- 评估双特异性T细胞在预防多发性骨髓瘤 (MM) 中抗原逃逸方面的有效性.
- 为了评估T细胞的识别和活动,与TCR和CAR一起进行工程.
主要方法:
- 基因工程 CD8 T 细胞生成以表达转基因 TCR 向 BOB1 (HLA-B*07:02) 和 BCMA 向 CAR.
- 对T细胞的表征,称为TRaCR T细胞,用于双抗原识别.
- 在异质多发性骨髓瘤体内模型中评估TRaCR T细胞疗效.
主要成果:
- TRaCR T细胞表现出双重特异性,识别了单独抵抗BOB1 TCR或BCMA CAR T细胞的细胞.
- 在两种抗原的存在下,CAR介导的识别是优先的,损害了TCR介导的识别.
- 这种优先的CAR参与导致了异质MM模型中的BCMA负瘤细胞的生存优势.
结论:
- 通过结合TCR和CAR工程,可以在T细胞上安装双抗原特异性.
- 一种向机制 (CAR) 对另一种向机制 (TCR) 的优先参与可能发生,这会影响治疗疗效.
- 在对异质瘤应用TRaCR T细胞策略时应谨慎,因为可能出现抗原逃逸和瘤细胞存活.
相关概念视频
T Cell Activation and Clonal Selection
623
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...
623
Diversity of Antigen Receptors
481
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...
481
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
Receptor Tyrosine Kinases
12.1K
Receptor tyrosine kinases or RTKs are membrane-bound receptors that phosphorylate specific tyrosine on protein substrates. RTKs regulate cellular growth, differentiation, survival, and migration. They contain an extracellular ligand binding domain, a transmembrane domain, and a cytosolic tail with intrinsic kinase activity. Several extracellular signaling molecules activate RTKs in one or more ways and relay the signal downstream. Ligands such as platelet-derived growth factor (PDGF) or...
12.1K
Antigens Involved in Adaptive Immunity
435
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...
435
Transducer Mechanism: Enzyme-Linked Receptors
2.3K
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
2.3K


