Incyte has started dosing patients in a Phase II clinical trial of ruxolitinib (Jakafi) in patients with essential thrombocythemia (ET) and resistant to or intolerant of hydroxyurea (HU).

Ruxolitinib is an inhibitor of JAK1/JAK2 and is approved by the US Food and Drug Administration (FDA) for treating polycythemia vera (PV).

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

The randomised, double-blind, cross-over, double-dummy Phase II trial is designed to assess the safety and efficacy of ruxolitinib in around 120 subjects aged 18 years and above.

During the treatment period, an oral twice-daily dose of ruxolitinib will be compared to a 1mg oral dose of anagrelide.

Incyte chief medical officer Steven Stein said: “We are pleased to treat the first patient in our pivotal trial evaluating ruxolitinib as a treatment for ET, a rare blood cancer that can lead to life-threatening complications.

“Advancing this trial to help address the needs of higher-risk patients with ET.”

“We look forward to building on the clinical evidence for ruxolitinib and to advancing this trial to help address the needs of higher-risk patients with ET, who are resistant to or intolerant of HU and currently have limited treatment options.”

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

The trial’s primary endpoint is the proportion of subjects achieving platelet and white blood cell (WBC) control over one year of follow-up.

Additionally, the trial will monitor key secondary endpoints of safety and tolerability measured by adverse events, along with the proportion of participants experiencing complete or partial remission as per European LeukemiaNet response criteria.

It is estimated that the pivotal trial will be completed in 2020.

Clinical Trials Arena Excellence Awards - Nominations Closed

Nominations are now closed for the Clinical Trials Arena Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact.

Excellence in Action
Recognised with 2025 Excellence Awards for Research and Development and Marketing , Novotech converted FDA/EMA fast track designations into faster HDV trial timelines while translating complex HBV science into sponsor ready insights. Discover how this dual strength in execution and communication is reshaping liver disease clinical development.

Discover the Impact