• Best Pract Res Clin Haematol · Jun 2014

    Review

    How many JAK inhibitors in myelofibrosis?

    • Bruna Velosa Ferreira and Claire Harrison.
    • Department of Haematology, Guy's and St Thomas' NHS Foundation Trust, London SE1 9RT, UK.
    • Best Pract Res Clin Haematol. 2014 Jun 1; 27 (2): 187-95.

    AbstractThe discovery of the activating mutation JAK2 V617F ushered a new era in MPN which included new diagnostic and prognostic criteria as well as a potential therapeutic target. JAK2 inhibition became a reality with first patients receiving drugs that targeted JAK2 in 2007 and was marked by the first approval in 2011 of Ruxolitinib a JAK 1 and 2-inhibitor to treat myelofibrosis (MF). In this article entitled "How many JAK inhibitors for myelofibrosis" we discuss JAK2 as a target, review briefly the benefits to patients with MF of JAK inhibition and highlight some of the differences between the number of JAK inhibitors currently being evaluated. Reflecting upon what we have learnt from the chronic myeloid leukaemia field and for MF regarding disease complexity as well as individual patient factors including resistance we discuss why it is likely we will need several different agents with JAK inhibitory activity. The next chapter discusses combination therapies for myelofibrosis which is a logical step in both trying to cure this disease and improve patient outcome and toxicities with JAK inhibitors. Crown Copyright © 2014. Published by Elsevier Ltd. All rights reserved.

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