FDA Allows Patient Enrollment to Resume in Monotherapy Dose Escalation of Emavusertib in TakeAim Leukemia Study

31 Aug 2022
www.prnewswire.com
CollaborateAntibodyOrphan DrugSmall molecular drug
LEXINGTON, Mass., Aug. 30, 2022 /PRNewswire/ -- Curis, Inc. (NASDAQ: CRIS), a biotechnology company focused on the development of innovative therapeutics for the treatment of cancer, today announced that the U.S. Food and Drug Administration (FDA) has notified Curis that it may resume enrollment of additional patients in the monotherapy phase of the TakeAim Leukemia study.
Previously, Curis announced that the FDA had placed partial clinical holds on the TakeAim Leukemia and TakeAim Lymphoma studies in April 2022. On August 18, 2022, Curis reported that the partial clinical hold on the TakeAim Lymphoma study was lifted. After review of the comprehensive data package submitted by Curis, the FDA has notified Curis that it may resume enrollment of additional patients in the monotherapy dose finding phase (Phase 1a) of the TakeAim Leukemia study, in which the company has agreed to enroll at least nine additional patients at the 200mg dose level. The partial hold remains in place for the combination therapy phase (Phase 1b) and the expansion phase (Phase 2a) of the study until Phase 1a is complete and the FDA approves proceeding to the next phases of the study.
Before lifting the restriction on patient enrollment, the FDA reviewed additional data provided by the company related to the risk of rhabdomyolysis, a side effect also associated with statins, as well as with cancer medications such as Odomzo® and Cotellic®. The FDA also reviewed the company's strategy for utilizing objective laboratory measurements, similar to those used with Odomzo and Cotellic, to identify rhabdomyolysis, as well as the company's strategy for managing rhabdomyolysis, if it is detected.
"We are pleased to announce the results of the FDA's review and to have addressed potential concerns about the identification and management of rhabdomyolysis," said James Dentzer, President and Chief Executive Officer of Curis. "We are working with our clinical sites to quickly resume enrollment of additional patients."
Similar to the TakeAim Lymphoma study, the Company is updating its timeline for clinical data release to reflect the availability of updated preliminary data from the TakeAim Leukemia study in 2023. In addition, Curis is proactively discussing the clinical plans for emavusertib in leukemia, including alignment on optimal dose and development path, with the FDA's leukemia division.
Emavusertib is an IRAK4 kinase inhibitor and IRAK4 plays an essential role in the toll-like receptor (TLR) and interleukin-1 receptor (IL-1R) signaling pathways, which are frequently dysregulated in patients with cancer. TLRs and the IL-1R family signal through the adaptor protein MYD88, which results in the assembly and activation of IRAK4, initiating a signaling cascade that induces cytokine and survival factor expression mediated by the NF-κB protein complex. Additionally, third parties have recently discovered that the long form of IRAK4 (IRAK4-L) is oncogenic and preferentially expressed in over half of patients with acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). The overexpression of IRAK4-L is believed to be driven by a variety of factors, including specific spliceosome mutations such as SF3B1 and U2AF1. In addition to inhibiting IRAK4, emavusertib was also designed to inhibit FLT3, a known oncologic driver, which may provide additional benefit in patients with AML and MDS.
About TakeAim Leukemia
The TakeAim Leukemia study (NCT04278768) is a Phase 1/2 open-label dose escalation, dose expansion clinical trial investigating emavusertib as a monotherapy and in combination with azacitidine or venetoclax in patients with relapsed or refractory (R/R) AML or high risk MDS. After dose escalation in monotherapy to determine the recommended Phase 2 dose (RP2D) and assuming the partial hold for the phase 1b cohort dose escalation in combination to determine the RP2D is lifted, we plan to expand five cohorts: monotherapy in AML patients with spliceosome and FLT3 mutations, monotherapy in patients with MDS and spliceosome mutations and combination therapy with azacitidine or venetoclax in patients without spliceosome or FLT3 mutations. The goals of the study are to determine several parameters including safety, maximum tolerated dose (MTD), RP2D and signals of activity.
About TakeAim Lymphoma
The TakeAim Lymphoma study (NCT03328078) is a Phase 1/2 open-label, dose escalation, dose expansion clinical trial investigating emavusertib as monotherapy and in combination with ibrutinib in patients with R/R hematologic malignancies, such as non-Hodgkin's lymphoma and other B cell malignancies. After dose escalation in both monotherapy and combination therapy to determine the RP2D, we plan to expand four cohorts for combination treatment: marginal zone lymphoma, activated b-cell diffuse large b-cell lymphoma, primary CNS lymphoma, and patients developing adaptive resistance to ibrutinib monotherapy. The goals of the study are to determine several parameters including safety, MTD, RP2D and signals of activity.
Curis is a biotechnology company focused on the development of innovative therapeutics for the treatment of cancer. In 2015, Curis entered into a collaboration with Aurigene in the areas of immuno-oncology and precision oncology. As part of this collaboration, Curis has exclusive licenses to oral small molecule antagonists of immune checkpoints including the VISTA/PDL1 antagonist CA-170, and the TIM3/PDL1 antagonist CA-327, as well as the IRAK4 kinase inhibitor, emavusertib (CA-4948). Emavusertib is currently undergoing testing in the Phase 1/2 TakeAim Lymphoma trial, in patients with hematologic malignancies, such as non-Hodgkin's lymphoma and other B cell malignancies, both as a monotherapy and in combination with BTK inhibitor ibrutinib, and the Phase 1/2 TakeAim Leukemia trial in patients with AML and MDS, for which it has received Orphan Drug Designation from the U.S. Food and Drug Administration. The FDA has placed a partial clinical hold on the TakeAim Leukemia trial during which no new patients will be enrolled in the combination phase (Phase 1b) of emavusertib with azacitidine or venetoclax and expansion phase (Phase 2a), and current study participants benefiting from treatment may continue to be treated with emavusertib at doses of 300mg BID or lower. In addition, Curis is engaged in a collaboration with ImmuNext for development of CI-8993, a monoclonal anti-VISTA antibody, which is currently undergoing testing in a Phase 1 trial in patients with solid tumors. Curis is also party to a collaboration with Genentech, a member of the Roche Group, under which Genentech and Roche are commercializing Erivedge® for the treatment of advanced basal cell carcinoma.
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