Protein Tyrosine Kinases - JAK3

AG 490 is a selective inhibitor of EGF receptor tyrosine kinase (IC50 values are 2 and 13.5 μM for EGFR and ErbB2 respectively). Also inhibits JAK2 with no activity to Lck, Lyn, Btk, Syk and Src.

TG101209, a novel JAK2 inhibitor, has significant in vitro activity in multiple myeloma and displays preferential cytotoxicity for CD45+ myeloma cells.

Pacritinib, also known as SB1518, is an orally bioavailable inhibitor of Janus kinase 2 (JAK2) and the JAK2 mutant JAK2V617F with potential antineoplastic activity. Pacritinib competes with JAK2 for ATP binding, which may result in inhibition of JAK2 activation, inhibition of the JAK-STAT signaling pathway, and so caspase-dependent apoptosis.

WHI-P 154 is a JAK3 inhibitor with IC50 = 1.8uM. WHI-P 154 also Inhibits STAT1 activation, iNOS expression and NO production in macrophages in vitro.