cytotoxicity (redirected from Cytotoxins)

cytotoxicity /cy·to·tox·ic·i·ty/ (si″to-tok-sis´ĭ-te) the degree to which an agent possesses a specific destructive action on certain cells or the possession of such action.cy´totoxic

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antibody-dependent cell-mediated cytotoxicity  (ADCC) lysis of antibody-coated target cells by effector cells with cytolytic activity and Fc receptors.

cell-mediated cytotoxicity  cytolysis of a target cell by effector lymphocytes, such as cytotoxic T lymphocytes or NK cells; it may be antibody-dependent or independent.

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cytotoxicity [si″to-tok-sis´ĭ-te]

1. the degree to which an agent has specific destructive action on certain cells.

2. the possession of such destructive action, particularly in reference to lysis of cells by immune phenomena and to antineoplastic agents that selectively kill dividing cells. adj., adj cytotox´ic.

antibody-dependent cell-mediated cytotoxicity (ADCC) (antibody-dependent cellular cytotoxicity) lysis of target cells coated with antibody by effector cells with cytolytic activity and specific immunoglobulin receptors called Fc receptors, including K cells, macrophages, and granulocytes. Lysis of the target cell is extracellular, requires direct cell-to-cell contact, and does not involve complement.

cell-mediated cytotoxicity destruction of a target cell by specific lymphocytes, such as cytotoxic T lymphocytes or NK cells; it may be antibody-dependent (see antibody-dependent cell-mediated c.) or independent, as in certain cell-mediated hypersensitivity reactions.

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cytotoxicity (sī´tōtoksis´itē),

n a description of the extent of the destructive or killing capacity of an agent. Most often used to describe the character of immune activity or toxicity of certain drugs that limit the development of cancer cells.

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cytotoxicity

destruction of cells; used to describe lysis of cells by immune mechanisms. See also antibody-dependent cell-mediated cytotoxicity (ADCC).