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Raajit Rampal: Pelabresib plus ruxolitinib for JAK inhibitor-naive myelofibrosis
Mar 11, 2025, 07:54

Raajit Rampal: Pelabresib plus ruxolitinib for JAK inhibitor-naive myelofibrosis

Raajit Rampal, an Associate Member at the Memorial Sloan Kettering Cancer Center, recently shared on X about recent paper he and colleagues co-authored, titled “Pelabresib plus ruxolitinib for JAK inhibitor-naive myelofibrosis: a randomized phase 3 trial” published on Nature Medicine.

Authors: Raajit K. Rampal, Sebastian Grosicki, Dominik Chraniuk, Elisabetta Abruzzese, Prithviraj Bose, Aaron T. Gerds, Alessandro M. Vannucchi, Francesca Palandri, Sung-Eun Lee, Vikas Gupta, Alessandro Lucchesi, Stephen T. Oh, Andrew T. Kuykendall, Andrea Patriarca, Alberto Álvarez-Larrán, Ruben Mesa, Jean-Jacques Kiladjian, Moshe Talpaz, Joseph M. Scandura, David Lavie, Morgan Harris, Sarah-Katharina Kays, Qing Li, Rainer Boxhammer, John Mascarenhas

Raajit Rampal: Pelabresib plus ruxolitinib for JAK inhibitor-naive myelofibrosis

“Out today in Nature Medicine phase 3 data from the MANIFEST-2 study.

The key preclinical observations that led to investigation of BET inhibition in MF came from showing that NF-kB output and disease features in MF murine models were attenuated by BETi.

A phase II study demonstrated that the BET inhibitor pelabresib in combination with RUX was tolerable and demonstrated efficacy beyond what was observed historically with RUX alone.

MANIFEST-2 demonstrate that the combination of RUX+PELA was superior to RUX alone in spleen volume reduction (primary endpoint). Symptom burden reduction was similar between both arms.

Importantly, reduction of key cytokines (IL-8) and bone marrow fibrosis was better with combination than RUX alone.”