CD8α结构域增强GUCY2C CAR-T细胞的有效性
Trevor R Baybutt1, Ariana A Entezari1, Adi Caspi1
1Department of Pharmacology, Physiology, and Cancer Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA.
Cancer biology & therapy
|September 24, 2024
概括
CD8ɑ链和跨膜域增强了CAR-T细胞对GUCY2C的亲和力,改善了对结直肠癌的抗瘤疗效,特别是在低抗原瘤中.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 生物技术是生物技术.
背景情况:
- 卡尔-T细胞疗法对血液性恶性瘤有希望,但在固体瘤中面临挑战.
- 瘤微环境,不良持久性和抗原稀缺性限制了CAR-T在固体瘤中的有效性.
- 关于它们对CAR-T细胞功能的影响,CAR组件,特别是链和跨膜领域,尚未得到充分研究.
研究的目的:
- 为了比较CD8ɑ和CD28衍生的链和跨膜域在GUCY2C向的CAR-T细胞中对结直肠癌的影响.
- 为了研究结构性CAR组件如何影响CAR-T细胞亲和力,效应器功能,以及体内抗瘤功效.
主要方法:
- 设计的第三代CAR-T细胞针对GUCY2C,具有CD8ɑ或CD28链和跨膜域.
- 评估了CAR表达,分化,耗尽表型,GUCY2C结合亲和力,细胞因子的产生和细胞分解活性.
- 在结直肠癌模型中评估体内抗瘤疗效.
主要成果:
- CD8ɑ和CD28域在抗原独立环境中没有影响CAR表达或T细胞表型.
- 具有CD8ɑ结构域的CAR-T细胞对GUCY2C表现出更高的亲和力.
- 增强的炎症性细胞因子和B粒酶的产生,改善的细胞解功能对抗低抗原瘤,强大的体内抗瘤活性被观察到CD8ɑCARs.
结论:
- CD8ɑ链和跨膜域可以增强CAR-T细胞亲和力和效应器功能.
- 这些结构成分对于优化CAR-T细胞治疗在结直肠癌等固体瘤中至关重要.
- 在CAR设计中考虑CD8ɑ结构域可能会导致更有效的CAR-T细胞治疗固体瘤.
相关概念视频
T Cell Activation and Clonal Selection
686
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...
686
Cytotoxic T Cells-mediated Immune Response
858
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...
858
Immunoglobulin-like Cell Adhesion Molecules
3.2K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
3.2K
Cell-mediated Immune Responses
67.8K
Overview
67.8K
B Cell Activation and Differentiation
1.6K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.6K
Antigen Presenting Cells
1.7K
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...
1.7K


