AZD1480

Pan JAK Inhibitor

Ruxolitinib (INCB018424) : Pan JAK1/2 inhibitor, IC50=3.3 nM/2.8 nM.

FDA-approved JAK Inhibitor

Tofacitinib (CP-690550,Tasocitinib) : Approved by FDA for rheumatoid arthritis (RA).

Newest JAK Inhibitor

XL019 ^New : Potent and selective JAK2 inhibitor with IC50 of 2.2 nM, exhibiting >50-fold selectivity over JAK1, JAK3 and TYK2.

Classic JAK Inhibitor

AG-490 (Tyrphostin B42) : Potent JAK2/3 inhibitor with IC50 of 1.2 nM/1.1 nM; also potent to Aurora A/B, Abl(T315I). Phase 1/2.

FLLL32 ^New

FLLL32 is a potent JAK2/STAT3 inhibitor with IC50 of <5 μM.

Cerdulatinib (PRT062070) ^New

Cerdulatinib (PRT-062070) is an oral active, multi-targeted tyrosine kinase inhibitor with IC50 of 12 nM/6 nM/8 nM/0.5 nM and 32 nM for JAK1/JAK2/JAK3/TYK2 and Syk, respectively. Also inhibits 19 other tested kinases with IC50 less than 200 nM.

Ruxolitinib (INCB018424)

Ruxolitinib (INCB018424) is the first potent, selective, JAK1/2 inhibitor to enter the clinic with IC50 of 3.3 nM/2.8 nM in cell-free assays, >130-fold selectivity for JAK1/2 versus JAK3. Ruxolitinib kills tumor cells through toxic mitophagy. Ruxolitinib induces autophagy and enhances apoptosis.

Tofacitinib (CP-690550) Citrate

Tofacitinib citrate (CP-690550 citrate) is a novel inhibitor of JAK with IC50 of 1 nM, 20 nM and 112 nM against JAK3, JAK2, and JAK1, respectively. Tofacitinib citrate has anti-infection activity.

Tofacitinib (CP-690550)

Tofacitinib (CP-690550,Tasocitinib) is a novel inhibitor of JAK3 with IC50 of 1 nM in cell-free assays, 20- to 100-fold less potent against JAK2 and JAK1. Tofacitinib inhibits the expression of antiapoptotic BCL-A1 and BCL-XL in human plasmacytoid dendritic cells (PDC) and induced PDC apoptosis.

Fedratinib (TG101348)

Fedratinib (SAR302503, TG101348) is a selective inhibitor of JAK2 with IC50 of 3 nM in cell-free assays, 35- and 334-fold more selective for JAK2 versus JAK1 and JAK3. Fedratinib also inhibits FMS-like tyrosine kinase 3 (FLT3) and Ret with IC50 of 15 nM and 48 nM, respectively. Fedratinib has potential antineoplastic activity. Fedratinib inhibits proliferation and induces apoptosis. Phase 2.

Momelotinib (CYT387)

Momelotinib (CYT387) is an ATP-competitive inhibitor of JAK1/JAK2 with IC50 of 11 nM/18 nM, ~10-fold selectivity versus JAK3. Momelotinib (CYT387) induces apoptosis and autophagy. Phase 3.

WP1066

WP1066 is a novel inhibitor of JAK2 and STAT3 with IC50 of 2.30 μM and 2.43 μM in HEL cells; shows activity to JAK2, STAT3, STAT5, and ERK1/2 not JAK1 and JAK3. WP1066 induces apoptosis. Phase 1.

Features:Similar to its parent compound AG490, WP1066 inhibits the phosphorylation of JAK2, but unlike AG490, WP1066 also degraded JAK2 protein.

Baricitinib (INCB028050)

Baricitinib (LY3009104, INCB028050) is a selective JAK1 and JAK2 inhibitor with IC50 of 5.9 nM and 5.7 nM in cell-free assays, ~70 and ~10-fold selective versus JAK3 and Tyk2, no inhibition to c-Met and Chk2. Baricitinib is found to reduce or interrupt the passage of the virus into target cells and is used in the treatment research for COVID-19. Phase 3.