T cell

(redirected from T lymphocytes)
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Related to T lymphocytes: MHC, B lymphocytes, Cytotoxic T lymphocytes
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Synonyms for T cell

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For a long time, the CD4+ T lymphocytes have been considered the only regulatory cells, due to their ability to secrete cytokines that regulate various processes of the immune response.
IL-2 plays a key role in the activation, survival, expansion, and function of T lymphocytes. It also appears to be crucial in the maintenance of regulatory T cell- (Treg-) mediated immunotolerance toward self-antigens, supported by the fact that IL-2-deficient mice develop severe autoimmunity with very low Treg and very high effector T numbers [7-9].
Yeo, PhD, assistant professor in the Department of Cellular and Molecular Medicine and Institute for Genomic Medicine, said that researchers have been trying for a very long time to understand when and how T lymphocytes give rise to effector and memory cells during an infection.
Abnormalities in CD4+ T lymphocyte subsets in patients with common variable immunodeficiency.
In addition to stimulating B lymphocytes, Th2 cells suppress the cytotoxic T lymphocyte response, decreasing the robustness of cell-mediated immunity.
Giorgi, Quantitation of CD38 Activation Antigen Expression on [CD8.sup.+] T Cells in HIV-1 Infection Using CD4 Expression on [CD4.sup.+] T Lymphocytes as a Biological Calibrator, Cytometry 33, 123-132 (1998).
For example, when a foreign substance is identified, lymphocytes called macrophages phagocytize the antagonist substances and break them up into fragments which are then exposed at the surface of the macrophage and presented to the immunoregulator T lymphocytes. These T lymphocytes activate and release messenger substances (cytokines) that increase the immune response and stimulate the production of antibodies by B lymphocytes.
The concentration of CD4 T lymphocytes, the infection-fighting white cells that decline dramatically during the course of AIDS, went from an initial average of 140 cells per cubic millimeter of blood on a slide to a healthier value of 360 cells per cubic millimeter.
These white cells of the variety known as T lymphocytes, or simply T-cells, were removed earlier and treated so that they contain good copies of the ADA gene for making the crucial enzyme that the girl lacks.
These cells were originally called "suppressor T lymphocytes." In their work, the researchers proved the cross-reactivity of related antigens by immunizing mice, first using sheep erythrocytes and then horse erythrocytes.
In fact, although oxidative phosphorylation still occurs in effector T lymphocytes [8], it seems that, of the glutamine (and glucose) utilized by these cells, only approximately 1.5% is oxidized [3].
Washington, January 4 ( ANI ): In a new study, researchers claim to have succeeded for the first time in creating cancer-specific, immune system cells called killer T lymphocytes, from induced pluripotent stem cells (iPS cells).
The evaluation of the proportion of polymorphonuclear leukocytes, macrophages, T lymphocytes, and B lymphocytes, as well the relative proportion of neovascularization in skin tissue specimens, was determined by quantitative image analysis (22).
Listeria has also been used to induce the development of IFN-[gamma]-secreting T-helper (Th)-1 [CD4.sup.+] T lymphocytes (Soussi et al.