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相关概念视频

Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

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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...
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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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...
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The Tumor Microenvironment02:17

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Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

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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...
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Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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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...
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相关实验视频

Updated: Jan 14, 2026

Using X-ray Crystallography, Biophysics, and Functional Assays to Determine the Mechanisms Governing T-cell Receptor Recognition of Cancer Antigens
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从野生类型的结构变化定义了拒绝瘤的新抗原.

Anngela C Adams1,2, Anne M Macy1,2, Elizabeth S Borden1,2

  • 1Department of Dermatology, The University of Arizona College of Medicine Phoenix, Phoenix, Arizona, USA.

Journal for immunotherapy of cancer
|October 22, 2025
PubMed
概括
此摘要是机器生成的。

预测癌症疫苗的新抗原是一个挑战. 这项研究确定了改善T细胞识别的新抗原的结构变化,有助于开发针对皮肤状细胞癌的个性化新抗原疫苗.

关键词:
主要组织相容性复杂 - - MHC.皮肤癌 皮肤癌 皮肤癌一个T细胞细胞.

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Tumor Transplantation for Assessing the Dynamics of Tumor-Infiltrating CD8+ T Cells in Mice
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科学领域:

  • 在瘤学瘤学.
  • 免疫学 免疫学 免疫学
  • 癌症基因组学 癌症基因组学

背景情况:

  • 预测引发瘤排斥的新抗原对于有效的癌症疫苗至关重要,特别是在皮肤状细胞癌 (cSCC) 等高突变癌症中.
  • 目前的新抗原优先排序方法往往无法引起强大的T细胞反应,突显了需要改进的预测标准的需要.

研究的目的:

  • 为预测瘤拒绝新抗原开发改进的标准.
  • 建立一个临床相关的小鼠模型,用于在cSCC.中研究新抗原疫苗.
  • 确定新抗原的特定结构特征,增强T细胞识别和调解瘤排斥.

主要方法:

  • 产生了紫外线诱导cSCC的小鼠模型,并与人类cSCC突变数据进行了比较.
  • 在小鼠模型中,新抗原被优先考虑,并使用ELISpot和体内疫苗接种试验确定了排斥瘤的新抗原.
  • 使用计算建模分析了新抗原的主要组织相容性复合体 (MHC) I类结合和结构特征.

主要成果:

  • 建立了一个小鼠模型,重复人类cSCC突变特征和驱动突变.
  • 确定了两种MHC I类新抗原,它们可以调解cSCC生长约束.
  • 反瘤新抗原表现出改变的MHC结合或突变残留物的溶剂可访问性增加,使他们与非免疫性新抗原区分开来.

结论:

  • 在cSCC中突变的有限共享支持了个性化新抗原疫苗的需求.
  • 一个验证的小鼠模型和两个定义的瘤拒绝新抗原为未来的研究提供.
  • 影响T细胞受体可访问性的结构特征是新抗原免疫性的主要决定因素,可以改善针对个性化疫苗的新抗原选择.