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Annual Meeting Proceedings Part 1 - American Society of Clinical ...

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TPS6640 General Poster Session (Board #31A), Mon, 1:15 PM-5:15 PM<br />

An open-label, multicenter, expanded access study assessing the safety<br />

and efficacy <strong>of</strong> oral ruxolitinib administered to patients with primary<br />

myel<strong>of</strong>ibrosis (PMF), post-polycythemia myel<strong>of</strong>ibrosis (PPV MF) or postessential<br />

thrombocythemia myel<strong>of</strong>ibrosis (PET-MF). Presenting Author:<br />

Philipp D. le Coutre, University <strong>of</strong> Medicine Berlin, Charité Campus<br />

Virchow, Berlin, Germany<br />

Background: Myel<strong>of</strong>ibrosis (MF) can be primary in origin or can progress<br />

from polycythemia vera (PPV-MF) or essential thrombocythemia (PET-MF).<br />

MF is characterized by cytopenias, reactive bone marrow fibrosis, splenomegaly,<br />

and constitutional symptoms including weight loss, fever, and<br />

night sweats. MF is associated with dysregulation <strong>of</strong> the Janus kinase<br />

pathway, irrespective <strong>of</strong> JAK2V617F mutation status. Recently, ruxolitinib<br />

(INCB018424) was approved for the treatment <strong>of</strong> MF on the basis <strong>of</strong> results<br />

from 2 phase 3 trials (COMFORT-I and -II). These trials demonstrated<br />

marked reductions in splenomegaly and symptom burden, and improvements<br />

in health-related quality <strong>of</strong> life (QoL) measures. Methods: JAK<br />

Inhibitor rUxolitinib in Myel<strong>of</strong>ibrosis Patients (JUMP) is a global, phase 3b<br />

expanded access trial (NCT01493414) designed to assess the safety and<br />

efficacy <strong>of</strong> ruxolitinib in adult pts with PMF, PPV-MF or PET-MF who are<br />

treatment naïve, and are intolerant <strong>of</strong>, or had progressed on any prior<br />

therapy. Inclusion criteria: peripheral blast count <strong>of</strong> �10%, adequate liver<br />

and renal function and intermediate-2 or high risk MF according to IPSS<br />

criteria or intermediate-1 risk MF with palpable spleen length � 5 cm. The<br />

primary endpoint is to assess the safety <strong>of</strong> ruxolitinib. Additional endpoints<br />

include the proportion <strong>of</strong> pts with a � 50% reduction in palpable spleen<br />

length, % change in white blood cell and platelet counts from baseline<br />

(BL), and change in packed red blood cell transfusion requirements.<br />

Changes from BL in QoL scores will be assessed using validated ECOG PS,<br />

FACT-Lymphoma, and FACIT instruments. Pts with a BL platelet count �<br />

200,000/�L will receive oral ruxolitinib 20 mg BID; pts with a BL platelet<br />

count <strong>of</strong> 100,000/�L to 200,000/�L will receive 15 mg BID; dose<br />

modifications are permitted for safety and efficacy. Global enrollment is<br />

open and currently includes 277 pts. This is planned to be the largest study<br />

ever conducted in pts with MF.<br />

Country #<strong>of</strong>Pts<br />

Austria 24<br />

Belgium 15<br />

Brazil 24<br />

Germany 173<br />

Spain 28<br />

Argentina 3<br />

Canada 3<br />

Netherlands 3<br />

Italy 4<br />

Total 277<br />

TPS6642^ General Poster Session (Board #31C), Mon, 1:15 PM-5:15 PM<br />

A phase Ib, open-label, dose-finding study <strong>of</strong> ruxolitinib in patients (pts)<br />

with primary myel<strong>of</strong>ibrosis (PMF), post-polycythemia vera-myel<strong>of</strong>ibrosis<br />

(PPV-MF), or post-essential thrombocythemia-myel<strong>of</strong>ibrosis (PET-MF) and<br />

baseline platelets (PLTs) 50 to

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