T cell

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Related to T lymphocytes: MHC, B lymphocytes, Cytotoxic T lymphocytes

T cell

n.
Any of a class of lymphocytes, including the helper T cells and cytotoxic T lymphocytes, that form in bone marrow and mature in the thymus. T cells are activated when receptors on the cell surface recognize specific antigens. Also called T lymphocyte.

[t(hymus-derived) cell.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

T cell



n.
any of several closely related lymphocytes, developed in the thymus, that circulate in the blood and lymph and regulate the immune system's response to infected or malignant cells. Also called T lymphocyte.
[1965–70; T(hymus-derived)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

T cell

Any of the lymphocytes that act to defend the body against disease by binding foreign antigens to receptors on the surface of their cells. T cells also regulate the function of B cells.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.T cell - a small lymphocyte developed in the thymus; it orchestrates the immune system's response to infected or malignant cells
lymph cell, lymphocyte - an agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but increases in the presence of infection
CD4 cell, CD4 T cell, helper cell, helper T cell - T cell with CD4 receptor that recognizes antigens on the surface of a virus-infected cell and secretes lymphokines that stimulate B cells and killer T cells; helper T cells are infected and killed by the AIDS virus
CD8 cell, CD8 T cell, cytotoxic T cell, killer cell, killer T cell - T cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill it
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
T lymphocytes, especially [CD4.sup.+], play important role in wound healing by secreting lymphokines to activate fibroblast, as wound anti-inflammatory agent, and activate factor in major histocompatibility complex (MHC) class II.
It is known that the CD8+ T lymphocytes, which have the NK-activating receptor NKG2D on their surface, acquire an NK-like activity and the ability to kill the HLA-negative tumor cells after a prolonged incubation with the IL-15 or IL-2 cytokines [7-9].
While several aspects of the pathogenesis are poorly understood, most findings support the central role of immune maladaptation-driven superficial placentation, leading to a systemic maternal inflammatory response, in which the role of activated T lymphocytes appears to be pivotal [1-3].
Naive T lymphocytes patrol the front lines of the human body's defense against infection, circulating in blood and tissues, searching for invasive microbes and other foreign antigens.
van der Schueren, "Changes of lymphocyte subsets after local irradiation for early stage breast cancer and seminoma testis: long-term increase of activated (HLA-DR+) T cells and decrease of "naive" (CD4-CD45R) T lymphocytes," European Journal of Cancer A, vol.
Laboratory control values for CD4 and CD8 T lymphocytes. Implications for HIV-1 diagnosis.
The most important effectors of the cell-mediated immune response, cytotoxic T lymphocytes, are the main immune cells that recognize foreign antigens on the surface of infected "self" cells.
Also see Evans 2002 (3): "Our findings provide the first evidence that depression may alter the function of killer lymphocytes in HIV-infected women and suggest that depression may decrease natural killer cell activity and lead to an increase in activated CD8 T lymphocytes and viral load" (quote from the abstract).
CD62L, or L-selectin, is expressed on the majority of B and T lymphocytes, and its expression is rapidly lost upon T-cell activation.
Immunohistochemistry of both tumors revealed a mixed population of CD2O-positive B lymphocytes and CD3-positive T lymphocytes.
There are, for example, reports demonstrating the feasibility of assessing CD38 expression levels on CD8 + T lymphocytes through quantitative cytometric analyses (3-5).
It contributes to the development of T lymphocytes, guard cells that participate in immune system reactions.