upregulation

noun

up·​reg·​u·​la·​tion ˈəp-ˌreg-yə-ˈlā-shən  -ˌreg-ə-ˈlā- 

: the process of increasing the response to a stimulus

specifically : increase in a cellular response to a molecular stimulus due to increase in the number of receptors on the cell surface

upregulate

-ˈreg-yə-ˌlāt 

transitive verb

upregulated; upregulating