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Home > Mechanism of Action

JAKAVI is a potent JAK1 and JAK2 inhibitor

  • JAKAVI acts on both JAK1 and JAK2 to inhibit overactive JAK/STAT signalling in MF[1]
  • JAKAVI binds to the kinase domain of JAK1 and JAK2 and inhibits JAK1 and JAK2 signalling regardless of the JAK2V617F mutation status[1]
  • JAKAVI inhibits JAK stimulation of STAT and downstream effects on cellular proliferation[1]

Hydroxyurea is a cytoreductive therapy and does not alter the natural history of the disease[2]



  1. JAKAVI® (ruxolitinib) tablets: EU Summary of Product Characteristics. Novartis; January 2022.

  2. Mughal T, Vaddi K, Sarlis NJ, Verstovsek S. Myelofibrosis-associated complications: pathogenesis, clinical manifestations, and effects on outcomes. Int J Gen Med. 2014;7:89-101.