Send to

Choose Destination
J Biol Chem. 2007 Feb 9;282(6):3428-32. Epub 2006 Dec 18.

Erlotinib effectively inhibits JAK2V617F activity and polycythemia vera cell growth.

Author information

Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA.


JAK2(V617F), a mutant of tyrosine kinase JAK2, is found in most patients with polycythemia vera (PV) and a substantial proportion of patients with idiopathic myelofibrosis or essential thrombocythemia. The JAK2 mutant displays a much increased kinase activity and generates a PV-like phenotype in mouse bone marrow transplant models. This study shows that the anti-cancer drug erlotinib (Tarceva) is a potent inhibitor of JAK2(V617F) activity. In vitro colony culture assays revealed that erlotinib at micro-molar concentrations effectively suppresses the growth and expansion of PV hematopoietic progenitor cells while having little effect on normal cells. Furthermore, JAK2(V617F)-positive cells from PV patients show greater susceptibility to the inhibitor than their negative counterparts. Similar inhibitory effects were found with the JAK2(V617F)-positive human erythroleukemia HEL cell line. These data suggest that erlotinib may be used for treatment of JAK2(V617F)-positive PV and other myeloproliferative disorders.

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center