Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.
    

concept

Advert for Guy's Tonic, to aid indigestion and nervousness, showing a nurse pouring the tonic into a measuring cup

NK T-cell lymphoma is a highly aggressive cancer of a specific type of immune cell called lymphoid cells, and is associated with the Epstein Barr virus (glandular fever). In later stages of the disease, the lymphoma can spread to the lymph nodes, as in this case. 

Uni-Sorb : catalog no. U-01 : ready-to-use nylon wool column for the preparation of enriched T and B cell populations / WAK-Chemie Medical GmbH.

Cellular architecture of normal human skin imaged by whole mount tissue microscopy. Human skin has a rich network of white blood cells (specifically dendritic cells, T cells and macrophages) which form sheaths around blood vessels. In this image, T cells (stained for CD3; red) dendritic cells (stained for MHC class II; green) and macrophages (stained for LYVE-1; blue with some cells showing a tinge of green) can be seen. Cell nuclei have been stained with DAPI (grey). This normal cellular architecture is grossly disrupted in diseased skin (see related images). X10 magnification. Scale bar (white) represents 200 micrometres.

A T-cell infected with HIV within a poster by the New Scientist describing the science of AIDS. Colour lithograph.

DNA sequence of CCR5 Delta 32 gene mutation

HIV assembly and budding, HIV viral life cycle, illustration

Normal spleen showing B cells and T cells

Cell-mediated immune response.

The B7-CD28 family molecules / [edited by] Lieping Chen.

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T-Lymphocytes

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Catalogue

DNA sequence of CCR5 Delta 32 gene mutation

HIV assembly and budding, HIV viral life cycle, illustration

Normal spleen showing B cells and T cells

Cell-mediated immune response.

The B7-CD28 family molecules / [edited by] Lieping Chen.