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lymphocyte
(redirected from T lymphocytes)

    Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson 0.32 sec.
lymphocyte: see blood blood, fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system ; heart ). An adult male of average size normally has about 6 quarts (5.6 liters) of blood.
..... Click the link for more information. ; immunity immunity, ability of an organism to resist disease by identifying and destroying foreign substances or organisms. Although all animals have some immune capabilities, little is known about nonmammalian immunity.
..... Click the link for more information. .

lymphocyte

Enlarge picture
Human lymphocyte (phase-contrast microphotograph).
(credit: Manfred Kage—Peter Arnold)
Type of leukocyte fundamental to the immune system, regulating and participating in acquired immunity. Each has receptor molecules on its surface that bind to a specific antigen. The two primary types, B cells and T cells, originate from stem cells in bone marrow and travel to lymphoid tissues. When a B cell binds to an antigen, it multiplies to form a clone of identical cells. Some of these, acted on by helper T cells, differentiate into plasma cells that produce antibodies against the antigen. Others (memory cells) multiply, providing long-term immunity to the antigen.
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Sepsis-induced apoptosis causes progressive profound depletion of B and CD4+ T lymphocytes in humans.
Prevention of immune cell apoptosis as potential therapeutic strategy ... by Bray, Mike / Emerging Infectious Diseases
Phenotypic and functional analysis of human T lymphocytes in early second- and third-trimester fetuses.
Air pollution and lymphocyte phenotype proportions in cord blood by Sram, Radim J. / Environmental Health Perspectives
This cytokine ordinarily is produced by helper T lymphocytes, and it is important in the regulation of immune reactions.
Advances in cancer immunotherapy by Sataloff, Robert T. / Ear, Nose and Throat Journal
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