Baricitinib (LY3009104): Selectivity & Specificity
Baricitinib (LY3009104) is a potent inhibitor of JAK1 (4.0–5.9 nM), JAK2 (6.6–8.8 nM), JAK3 (> 500 nM), TYK2 (53 nM), Recombinant JAK1 (5.9 nM), Recombinant JAK2 (5.7 nM), Recombinant JAK3 (>400 nM), Recombinant TYK2 (53 nM), hERG channels (50 to 60 μg/mL), JAK1/2 (5.8 nM), RANKL, AAK1, total LDL (15.77 (12.09) nmol/L), Large LDL (81.74 (8.09) nmol/L), Small LDL (−80.26 (14.89) nmol/L), Medium small LDL (−16.29 (3.11) nmol/L), Very small LDL (−63.93 (11.91) nmol/L), total HDL (4.73 (0.21) nmol/L), Large HDL (0.98 (0.12) nmol/L), Medium HDL (0.63 (0.14) nmol/L), Small HDL (3.08 (0.21) nmol/L), LDL particle size (0.25 (0.03) nm), VLDL particle size (2.34 (0.40) nmol/L), GlycA (−80.55 µmol/L). Baricitinib (LY3009104) exhibits the greatest inhibitory potency toward JAK1 (IC50 = 4.0–5.9 nM).