Background:

WP1066, an analogue of AG490, is a novel and potent inhibitor of janus kinase 2 (JAK2), which inhibits the phosphorylation of JAK2 and degrades JAK2 protein consequently blocking JAK2’s downstream signal transducer and activator of transcription (transcription-3 and transcription-5) as well as phosphoinositide-3-kinase pathways in a dose- and time-dependent manner. Results of preliminary studies suggest that WP1066 inhibits the growth of xenograft tumors generated from Caki-1 renal carcinoma cells (RCC) suppressing tumor angiogenesis and exhibits antiproliferative activity in AML colony-forming cells from newly diagnosed AML patients as well as in AML cell lines OCIM2 and K562, which potentiates it to treat RCC, acute myeloid leukemia (AML) and other hematologic maglignancies.

Reference

[1].Srdan Verstovsek, Taghi Manshouri, Alfonso Quintas-Cardama, David Harris, Jorge Cortes, Francis J. Giles, Hagop Kantarjian, Waldemar Priebe, and Zeev Estrov. WP1066, a novel JAK2 inhibitor, suppresses proliferation and induces apoptosis in erythroid human cells carrying the JAK2 V617F mutation. Clin Cancer Res 2008; 14: 788-796
[2].Alessandra Ferrajoli, Stefan Faderl, Quin Van, Patricia Koch, David Harris, Zhiming Liu, Inbal Hazan-Halevy, Yongtao Wang, Hagop M. Kantarjian, Waldemar Priebe, and Zeev Estrov. WP1066 disrupts janus kinase-2 and induces caspase-dependent apoptosis in acute myelogenous leukemia cells. Cancer Res 2007; 67: 11291-11299
[3].A Horiguchi, T Asano, K Kuroda, A Sato, J Asakuma, K Ito, M Hayakawa, M Sumitomo and T Asano. STAT3 inhibitor WP1066 as a novel therapeutic agent for renal cell carcinoma. British Journal of Cancer 2010; 102: 1592-1599