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Memory T cells
Memory T cells are a specific type of infection-fighting T cell (also known as a T lymphocyte) that can recognize foreign invaders such as bacteria or viruses, that were encountered during a prior infection or vaccination. At a second encounter with the invader, memory T cells can reproduce to mount a faster and stronger immune response than the first time the immune system responded to the invader. This behaviour is utilized in T lymphocyte proliferation assays, which can reveal exposure to specific antigens.
Additional recommended knowledge
Within the human cytotoxic T cell population, three distinct sub-populations have now been described:
Memory T cells can be recognized by the differential expression of certain molecules.
Antigen-specific memory T cells against viruses or other microbial molecules can be found in both TCM and TEM subsets. Although most information is currently based on observations in the Cytotoxic T cells (CD8-positive) subset, similar populations appear to exist for Helper T cells (CD4-positive).
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Memory_T_cells". A list of authors is available in Wikipedia.|