downregulation

Cell biology The reduction of a cell’s response to a hormone or other ligand by internalizing its cognate receptor and degrading it within a coated pit; downregulation is a mechanism by which receptors respond to an excess of ligands
Genetics The decrease of a gene’s transcriptional machinery usually by a DNA-binding protein that acts on a regulatory region

down·reg·u·la·tion

(down-reg-yū-lā'shŭn) Development of a refractory or tolerant state consequent on repeated administration of a pharmacologically or physiologically active substance; often accompanied by an initial decrease in affinity of receptors for the agent and a subsequent diminution in the number of receptors.

单词	downregulation
释义	downregulation downregulation (ˌdaʊnrɛɡjʊˈleɪʃən) n (Medicine) a decrease in sensitivity, through overexposure, to a drug or other chemical caused by a reduction in the number or density of receptors on cell surfaces downregulation Cell biology The reduction of a cell’s response to a hormone or other ligand by internalizing its cognate receptor and degrading it within a coated pit; downregulation is a mechanism by which receptors respond to an excess of ligands Genetics The decrease of a gene’s transcriptional machinery usually by a DNA-binding protein that acts on a regulatory region down·reg·u·la·tion (down-reg-yū-lā'shŭn) Development of a refractory or tolerant state consequent on repeated administration of a pharmacologically or physiologically active substance; often accompanied by an initial decrease in affinity of receptors for the agent and a subsequent diminution in the number of receptors.
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