Geron Announces Fifty Percent Enrollment in the Phase 3 IMpactMF Clinical Trial Evaluating Imetelstat in Patients with Relapsed/Refractory Myelofibrosis - Seite 2

An interim analysis is expected when ~35% of the planned enrolled patients have died (alpha spend ~0.01), and a final analysis is expected when more than 50% of the planned enrolled patients have died. Based on projected planning assumptions for enrollment and death rates in the trial, interim analysis is expected in the first half of 2025 and final analysis is expected in the first half of 2026.

The Phase 3 IMpactMF clinical trial is based on results from IMbark Phase 2, in which the 9.4 mg/kg dose every three weeks demonstrated clinical benefits in symptom response rate, with an acceptable safety profile for this poor-risk JAKi relapsed/refractory MF patient population. Biomarker and bone marrow assessments suggested selective effects on the malignant clone. A median OS of 29.9 months in imetelstat 9.4 mg/kg arm was observed in IMbark Phase 2, compared to 14-16 months median OS for historical controls for these JAKi relapsed/refractory MF patients.

About Imetelstat

Imetelstat is a novel, first-in-class investigational telomerase inhibitor exclusively owned by Geron and being developed in hematologic malignancies. Data from non-clinical studies and clinical trials of imetelstat provide strong evidence that imetelstat targets telomerase to inhibit the uncontrolled proliferation of malignant stem and progenitor cells in myeloid hematologic malignancies resulting in malignant cell apoptosis and potential disease-modifying activity. Imetelstat has been granted Fast Track designation by the U.S. Food and Drug Administration for both the treatment of adult patients with transfusion dependent anemia due to Low or Intermediate-1 risk MDS that is not associated with del(5q) who are refractory or resistant to an erythropoiesis stimulating agent, and for adult patients with Intermediate-2 or High-risk myelofibrosis (MF) whose disease has relapsed after or is refractory to janus associated kinase (JAK) inhibitor treatment. Imetelstat is currently not approved by any regulatory authority.

About Geron

Geron is a late-stage clinical biopharmaceutical company pursuing therapies with the potential to extend and enrich the lives of patients living with hematologic malignancies. Our first-in-class investigational telomerase inhibitor, imetelstat, harnesses Nobel Prize-winning science in a treatment that may alter the underlying drivers of disease. The New Drug Application (NDA) for imetelstat for the treatment of transfusion dependent anemia in patients with lower risk myelodysplastic syndromes (LR MDS) who have failed to respond or have lost response to or are ineligible for erythropoiesis-stimulating agents (ESAs), based on the results from the Phase 3 IMerge clinical trial, is currently under review by the United States Food and Drug Administration (FDA) with a Prescription Drug User Fee Act (PDUFA) target action date of June 16, 2024. In addition, an MAA is under review in the European Union for the same proposed indication. Furthermore, Geron currently has an ongoing pivotal Phase 3 clinical trial evaluating imetelstat in relapsed/refractory myelofibrosis (MF). To learn more, visit www.geron.com or follow us on LinkedIn.