Phase 2 study of add-on parsaclisib for patients with myelofibrosis and suboptimal response to ruxolitinib : final results

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ABSTRACT: Ruxolitinib reduces spleen volume, improves symptoms, and increases survival in patients with intermediate- or high-risk myelofibrosis. However, suboptimal response may occur, potentially because of signaling via the phosphoinositide 3-kinase (PI3K)/protein kinase B pathway. This phase 2 study evaluated dosing, efficacy, and safety of add-on PI3Kδ inhibitor parsaclisib for patients with primary or secondary myelofibrosis with suboptimal response to ruxolitinib. Eligible patients remained on a stable ruxolitinib dose and received add-on parsaclisib 10 or 20 mg, once daily for 8 weeks, and once weekly thereafter (daily-to-weekly dosing; n = 32); or parsaclisib 5 or 20 mg, once daily for 8 weeks, then 5 mg once daily thereafter (all-daily dosing; n = 42). Proportion of patients achieving a ≥10% decrease in spleen volume at 12 weeks was 28% for daily-to-weekly dosing and 59.5% for all-daily dosing. Proportions of patients achieving ≥50% decrease at week 12 in Myelofibrosis Symptom Assessment Form and Myeloproliferative Neoplasms Symptom Assessment Form symptom scores were 14% and 18% for daily-to-weekly dosing, and 28% and 32% for all-daily dosing, respectively. Most common nonhematologic treatment-emergent adverse events were nausea (23%), diarrhea (22%), abdominal pain and fatigue (each 19%), and cough and dyspnea (each 18%). New-onset grade 3 and 4 thrombocytopenia were observed in 19% of patients, each dosed daily-to-weekly, and in 26% and 7% of patients dosed all-daily, respectively, managed with dose interruptions. Hemoglobin levels remained steady. The addition of parsaclisib to stable-dose ruxolitinib can reduce splenomegaly and improve symptoms, with manageable toxicity in patients with myelofibrosis with suboptimal response to ruxolitinib. This trial was registered at www.clinicaltrials.gov as #NCT02718300.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:8

Enthalten in:

Blood advances - 8(2024), 6 vom: 26. März, Seite 1515-1528

Sprache:

Englisch

Beteiligte Personen:

Yacoub, Abdulraheem [VerfasserIn]
Borate, Uma [VerfasserIn]
Rampal, Raajit K [VerfasserIn]
Ali, Haris [VerfasserIn]
Wang, Eunice S [VerfasserIn]
Gerds, Aaron T [VerfasserIn]
Hobbs, Gabriela [VerfasserIn]
Kremyanskaya, Marina [VerfasserIn]
Winton, Elliott [VerfasserIn]
O'Connell, Casey [VerfasserIn]
Goel, Swati [VerfasserIn]
Oh, Stephen T [VerfasserIn]
Schiller, Gary [VerfasserIn]
McCloskey, James [VerfasserIn]
Palmer, Jeanne [VerfasserIn]
Holmes, Houston [VerfasserIn]
Hager, Steven [VerfasserIn]
Assad, Albert [VerfasserIn]
Erickson-Viitanen, Susan [VerfasserIn]
Zhou, Feng [VerfasserIn]
Daver, Naval [VerfasserIn]

Links:

Volltext

Themen:

82S8X8XX8H
Clinical Trial, Phase II
EC 2.7.1.-
Journal Article
Nitriles
OS7097575K
Parsaclisib
Phosphatidylinositol 3-Kinases
Pyrazoles
Pyrimidines
Pyrrolidines
Ruxolitinib

Anmerkungen:

Date Completed 19.03.2024

Date Revised 29.03.2024

published: Print

ClinicalTrials.gov: NCT02718300

Citation Status MEDLINE

doi:

10.1182/bloodadvances.2023011620

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM367804514