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Related Concept Videos

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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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.
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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.
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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
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Tailoring In Vivo Cytotoxicity Assays to Study Immunodominance in Tumor-specific CD8+ T Cell Responses
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T-cell membrane antigens associated with cytotoxic function.

B Bonavida1, J Fan, J C Hiserodt

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Researchers are uncovering the molecular mechanisms behind T-cell-mediated cytotoxicity. Studies using antibodies to block T-cell surface molecules provide key insights into this immune response.

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Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • T-cell-mediated cytotoxicity is crucial for immune responses.
  • Understanding its molecular basis is an active area of research.

Purpose of the Study:

  • To review recent studies on the molecular mechanisms of T-cell cytotoxicity.
  • To focus on the role of T-cell surface molecules, particularly antigen receptors.

Main Methods:

  • Review of studies investigating T-cell-mediated cytotoxicity.
  • Analysis of experiments using antisera and monoclonal antibodies to inhibit cytotoxic T cells.

Main Results:

  • Identified the involvement of idiotype-bearing antigen-receptors in T-cell cytotoxicity.
  • Highlighted the significance of other T-cell surface molecules.

Conclusions:

  • Significant progress has been made in understanding the molecular basis of T-cell cytotoxicity.
  • Inhibition studies with antibodies offer valuable insights into the function of T-cell surface molecules.