Downregulate

Part of speech: verb

Definitions

1. To lessen the level of gene expression or protein activity, which can modify cellular processes and behavior
2. To diminish the functional output of a biological activity, impacting how cells react to stimuli or regulate themselves
3. To reduce the intensity of genetic or protein expression, leading to alterations in how cells function and interact with their environment

Etymology: "Downregulate" is a plain compound: the prefix "down-" attached to "regulate." The verb "regulate" comes from the Latin "regulatus," the past participle of "regulare," meaning to control or direct by rule, itself built from "regula," a rule or straight stick used for measuring. The prefix "down-" is the ordinary English word meaning toward a lower position, and in verbs it reverses or lowers the action of the base word. The meaning of "downregulate" follows directly from that. Cells constantly switch genes on and off, and biologists use "regulate" for this control over how much a gene is active. Adding "down-" turns the sense from adjusting the activity to lowering it, so the term describes a gene being made less active, its protein output reduced. Its counterpart, "upregulate," works the same way in the opposite direction.

Synonyms: decrease, reduce, diminish

Antonyms: upregulate, increase, amplify