MECHANISM OF ACTION

An oral small molecule psoriasis therapy selectively inhibiting TYK21*

Adapted from Product Monograph.

  • SOTYKTU is a small molecule of that selectively inhibits the TYK2 enzyme
  • TYK2 mediates signaling within the IL-23/Th17 pathophysiology pathway of psoriasis including
    signaling of IL-23, IL-12, and Type 1 IFN cytokines
  • SOTYKTU binds to the regulatory domain of TYK2, stabilizing an inhibitory interaction between the regulatory
    and the catalytic domains of the enzyme
  • This results in allosteric inhibition of receptor-mediated activation of TYK2 and its downstream functions in cells
  • SOTYKTU inhibits the release of proinflammatory cytokines and chemokines

IFN=interferon; IL=interleukin; JAK=Janus kinase; Th=T helper; TYK2=tyrosine kinase 2
* Clinical significance unknown.
References:
1. SOTYKTU Product Monograph. Bristol-Myers Squibb Canada Co. November 23, 2022

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