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CTL-mediated cytotoxicity. Within the scientific discipline of toxicology, Cytotoxic T lymphocytes (CTLs) are generated by immune activation of cytotoxic T cells (T c cells). They are generally CD8 +, which makes them MHC class I restricted. CTLs are able to eliminate most cells in the body since most nucleated cells express class I MHC molecules.
A cytotoxic T cell (also known as TC, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8+ T-cell or killer T cell) is a T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected by intracellular pathogens (such as viruses or bacteria), or cells that are damaged in other ways. [1]
Tetramer assay. A tetramer assay (also known as a tetramer stain) is a procedure that uses tetrameric proteins to detect and quantify T cells that are specific for a given antigen within a blood sample. [1] The tetramers used in the assay are made up of four major histocompatibility complex (MHC) molecules, which are found on the surface of ...
The Center for Transnational Legal Studies (CTLS) is a global educational center for the study of transnational law. [1] The Center was founded in London in October 2008 as an initiative by Georgetown University Law Center, providing educational services and student resources. It was constituted as a joint venture between several leading law ...
The role of CD4 + T cells in antitumor immunity is controversial. It was suggested that CD4 + T cells can have a direct role in antitumor immunity through direct recognition of tumor antigens presented on the surface of tumor cells in association with MHC class II molecules. [1] Of note, results from recent reports suggest that direct ...
Open defecation is the practice of defecating out in the open, rather than using a toilet. "Open defecation free" (ODF) is a central term for community-led total sanitation (CLTS) programs. It primarily means the eradication of open defecation in the entire community. However, ODF can also include the additional criteria, such as: [7] Household ...
Innate resistance to HIV. A small proportion of humans show partial or apparently complete innate resistance to HIV, the virus that causes AIDS. [1] The main mechanism is a mutation of the gene encoding CCR5, which acts as a co-receptor for HIV. It is estimated that the proportion of people with some form of resistance to HIV is under 10%.
Viral epitope presentation with MHC class I is a requirement for activation of cytotoxic T-lymphocytes (CTLs), the major effectors of the cell-mediated immune response against virally-infected cells. ICP-47 prevents initiation of a CTL-response against HSV, allowing the virus to survive for a protracted period in the host.