1. A Phase 2 Study of the LSD1 Inhibitor Img-7289 (bomedemstat) for the Treatment of Advanced Myelofibrosis.
- Author
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Gill H., Yacoub A., Pettit K.M., Bradley T., Gerds A.T., Tatarczuch M., Shortt J., Curtin N.J., Rossetti J.M., Burbury K., Mead A.J., Gothert J.R., Koschmieder S., Jones A., Peppe J., Natsoulis G., Hong W.-J., Stevenson W.S., Ewing J., Harrison C.N., Vannucchi A., Watts J., Ross D.M., Talpaz M., Rienhoff H.Y., Gill H., Yacoub A., Pettit K.M., Bradley T., Gerds A.T., Tatarczuch M., Shortt J., Curtin N.J., Rossetti J.M., Burbury K., Mead A.J., Gothert J.R., Koschmieder S., Jones A., Peppe J., Natsoulis G., Hong W.-J., Stevenson W.S., Ewing J., Harrison C.N., Vannucchi A., Watts J., Ross D.M., Talpaz M., and Rienhoff H.Y.
- Abstract
[Formula presented] There is an unmet need for novel therapies with distinct modes of action to offer clinical benefit for patients with myelofibrosis (MF) who become resistant or intolerant to JAK inhibitors. Lysine-specific demethylase-1 (LSD1) is a histone demethylase critical for self-renewal potential of malignant myeloid cells for hematopoietic differentiation, e.g., LSD1 licenses maturation of megakaryocytes, one cell type critical to the pathogenesis of MF. Bomedemstat is an orally active LSD1 inhibitor that in mouse models of MPNs reduced peripheral cell counts, splenomegaly, inflammatory cytokines, marrow fibrosis, mutant cell burden and overall survival (Jutzi et al. 2018). IMG-7289-CTP-102 is a global, open-label Phase 1/2 study evaluating bomedemstat dosed once daily in MF patients (NCT03136185). Data from this ongoing study are presented. Key eligibility criteria include IPSS int.-1 or -2 or high-risk patients refractory or resistant to, inadequately controlled by or intolerant of available approved therapy, or in the Investigator's judgment, are not candidates for available approved therapy, peripheral blast count <=10%, absolute neutrophil count >=0.5 x 10 9/L, and platelet count >=100 x 10 9/L. Key objectives are safety and reduction of spleen volume (SVR) by MRI/CT and total symptoms scores (TSS) using the MPN-SAF instrument. Serial bone marrow (BM) biopsies and imaging studies are read centrally. Of 261 genes recurrently mutated in AML/MPN/MDS, germline and somatic baseline and follow-up sequencing is conducted to quantify existing or new mutant alleles frequencies (MAF). Dosing is individually tailored using platelet count as a biomarker of bomedemstat activity on megakaryocyte function, targeting a range between 50-100 x 10 9/L and titrating as needed. At data cutoff (15 July 2021), the study is fully enrolled with 89 patients: 49% primary MF, 30% post-essential thrombocythemia-MF, 21% post-polycythemia vera-MF. Median age is 68 (35-88) with 52%
- Published
- 2021