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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 ...
T cells are grouped into a series of subsets based on their function. CD4 and CD8 T cells are selected in the thymus, but undergo further differentiation in the periphery to specialized cells which have different functions. T cell subsets were initially defined by function, but also have associated gene or protein expression patterns.
The term "NK T cells" was first used in mice to define a subset of T cells that expressed the natural killer (NK) cell-associated marker NK1.1 (CD161). It is now generally accepted that the term "NKT cells" refers to CD1d-restricted T cells , present in mice and humans, some of which coexpress a heavily biased, semi-invariant T-cell receptor ...
In the skin, lung, brain, and vagina T RM cells are required to provide immediate rapid control of re-infection. CD4 + T RM cells provide better protection against repeated infection with influenza in comparison with circulating memory CD4 + T cells. [23] [24] Moreover, CD8 + T RM cells also play role in the protection against malignancies. [5]
Natural killer cells also express the IL-23 receptor. They respond with increased interferon-γ secretion and enhanced antibody-dependent cellular cytotoxicity. IL-23 also induces proliferation of CD4 memory T cells (but not naïve T cells). [6] Besides its proinflammatory effects, IL-23 promotes angiogenesis. [7]
The muscle, gland or organ cell capable of responding to a stimulus at the terminal end of an efferent nerve fiber; Plasma cell, an effector B cell in the immune system; Effector T cells, T cells that actively respond to a stimulus; Cytokine-induced killer cells, strongly productive cytotoxic effector cells that are capable of lysing tumor ...
In cell biology, a lymphokine-activated killer cell (also known as a LAK cell) is a white blood cell, consisting mostly of natural killer, natural killer T, and T cells that has been stimulated to kill tumor cells, but because of the function in which they activate, and the cells they can successfully target, they are classified as different than the classical natural killer and T lymphocyte ...
They include T cells and B cells and are part of the larger category of ‘tumor-infiltrating immune cells’ which consist of both mononuclear and polymorphonuclear immune cells, (i.e., T cells, B cells, natural killer cells, macrophages, neutrophils, dendritic cells, mast cells, eosinophils, basophils, etc.) in variable proportions. Their ...