Deucravacitinib

Deucravacitinib, a highly selective allosteric TYK2 inhibitor, received its first approval from the FDA in 2022 for the treatment of adults with moderate-to-severe plaque psoriasis who are candidates for systemic therapy or phototherapy protein and lipid kinases and pseudokinases with the exception of BMPR2 (IC50 = 193 nM) and JAK1 JH2 pseudokinase domain (IC50 = 1 nM). Despite its potent affinity for JAK1 JH2, deucravacitinib elicited low functional activity in a JAK1/JAK3-dependent IL-2 stimulated cellular assay. BMS-986202 displays >10,000-fold selectivity for TYK2 JH2 over a diverse panel of 273 kinases and pseudokinases that include JAK family members. Like deucravacitinib, its high binding affinity to JAK1 JH2 (IC50 = 7.8 nM) did not translate to functional activity in the cellular assay.