Ustekinumab hæmmer bioaktiviteten af human IL- 12 og IL- 23 ved at forhindre, at disse cytokiner binder sig til deres IL- 12Rβ1 - receptorprotein, der er udtrykt på overfladen af immunceller.
Ustekinumab inhibits the activity of human IL-12 and IL-23 by preventing these cytokines from binding to their IL-12Rβ 1 receptor protein expressed on the surface of immune cells.