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  2. Cytotoxic T cell - Wikipedia

    en.wikipedia.org/wiki/Cytotoxic_T_cell

    Antigen presentation stimulates T cells to become either "cytotoxic" CD8+ cells or "helper" CD4+ cells.. A cytotoxic T cell (also known as T C, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8 + T-cell or killer T cell) is a T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected by intracellular pathogens such as viruses or bacteria, or ...

  3. CTL-mediated cytotoxicity - Wikipedia

    en.wikipedia.org/wiki/CTL-mediated_cytotoxicity

    CTLs are able to eliminate most cells in the body since most nucleated cells express class I MHC molecules. The CTL-mediated immune system can be divided into two phases. In the first phase, functional effector CTLs are generated from naive T c cells through activation and differentiation. In the second phase, affector CTLs destroy target cells ...

  4. T cell - Wikipedia

    en.wikipedia.org/wiki/T_cell

    Cytotoxic T cells (T C cells, CTLs, T-killer cells, killer T cells) destroy virus-infected cells and tumor cells, and are also implicated in transplant rejection. These cells are defined by the expression of the CD8 protein on their cell surface. Cytotoxic T cells recognize their targets by binding to short peptides (8-11 amino acids in length ...

  5. Fas ligand - Wikipedia

    en.wikipedia.org/wiki/Fas_ligand

    Cytotoxic T-cell activity: Fas-induced apoptosis and the perforin pathway are the two main mechanisms by which cytotoxic T lymphocytes induce cell death in cells expressing foreign antigens. [ 13 ] Immune privilege : Cells in immune privileged areas such as the cornea or testes express Fas ligand and induce the apoptosis of infiltrating ...

  6. CD3 (immunology) - Wikipedia

    en.wikipedia.org/wiki/CD3_(immunology)

    CD3 (cluster of differentiation 3) is a protein complex and T cell co-receptor that is involved in activating both the cytotoxic T cell (CD8+ naive T cells) and T helper cells (CD4+ naive T cells). [1] It is composed of four distinct chains. In mammals, the complex contains a CD3γ chain, a CD3δ chain, and two CD3ε chains.

  7. Antigen presentation - Wikipedia

    en.wikipedia.org/wiki/Antigen_presentation

    Antigen processing and presentation in MHC-I pathway. Cytotoxic T cells (also known as T c, killer T cell, or cytotoxic T-lymphocyte (CTL)) express CD8 co-receptors and are a population of T cells that are specialized for inducing programmed cell death of other cells.

  8. Cell-mediated immunity - Wikipedia

    en.wikipedia.org/wiki/Cell-mediated_immunity

    T H 2 cells which produce IL-4, IL-5, and IL-13. A third category called T helper 17 cells (T H 17) were also discovered which are named after their secretion of Interleukin 17. CD8 + cytotoxic T-cells may also be categorized as: [5] T c 1 cells, T c 2 cells. Similarly to CD4 + T H cells, a third category called T C 17 were discovered that also ...

  9. Priming (immunology) - Wikipedia

    en.wikipedia.org/wiki/Priming_(immunology)

    Priming of naïve T cells requires dendritic cell antigen presentation. Priming of naive CD8 T cells generates cytotoxic T cells capable of directly killing pathogen-infected cells. CD4 cells develop into a diverse array of effector cell types depending on the nature of the signals they receive during priming.