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killer T cell

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
killer T cell
n.

killer T cell  (klr)
A large differentiated T cell that functions in cell-mediated immunity by attacking and lysing target cells that have specific surface antigens. Also called cytotoxic T cell, killer cell.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.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
T cell, T lymphocyte - a small lymphocyte developed in the thymus; it orchestrates the immune system's response to infected or malignant cells


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The killer T cell strategy is employed against viruses.
According to them, when HIV infects a cell, a complex of human immune proteins called HLA (short for human leukocyte antigen) alert killer T cells by displaying bits of the virus on the surface of the cell, in response to which the T-cells trigger immune attack.
First, they need immune cells called dendritic cells to chew up a sample of the target and present a piece to the killer T cell as an example of what to look for.
 
 
 
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