Kura Oncology Provides Update on Phase 1b Study of KO-539 in Acute Myeloid Leukemia

SAN DIEGO, CA, USA I November 24, 2021 I Kura Oncology, Inc. (Nasdaq: KURA), a clinical-stage biopharmaceutical company committed to realizing the promise of precision medicines for the treatment of cancer, today announced that the U.S. Food and Drug Administration (FDA) has placed the KOMET-001 Phase 1b study of KO-539 in patients with relapsed or refractory acute myeloid leukemia (AML) on a partial clinical hold. The partial clinical hold was initiated following the Company’s recent report to the FDA of a Grade 5 serious adverse event (patient death) potentially associated with differentiation syndrome, a known adverse event related to differentiating agents in the treatment of AML.

Patients currently enrolled in the Phase 1b study may continue to receive KO-539, although no additional patients may be enrolled until the partial clinical hold is resolved. Kura is working closely with the FDA and the site investigators to resolve the partial clinical hold as quickly as possible.

“We share the FDA’s commitment to patient safety, and we appreciate our ongoing dialogue as we work diligently to address their questions,” said Troy Wilson, Ph.D., J.D., President and Chief Executive Officer of Kura Oncology. “Differentiation syndrome is known to be an on-target effect associated with therapeutic agents that induce differentiation, and we want to ensure physicians are fully informed and prepared to address these events if they occur. Based on the totality of preclinical and clinical data, we continue to believe that KO-539 has the potential to address the significant unmet medical need of AML patients, including those with NPM1 mutations and KMT2A rearrangements.”

Until the partial clinical hold is resolved, and the Company has more clarity regarding the impact on timing, Kura is suspending guidance on the completion of enrollment in the KOMET-001 Phase 1b study and determination of the recommended Phase 2 dose of KO-539.

About Kura Oncology

Kura Oncology is a clinical-stage biopharmaceutical company committed to realizing the promise of precision medicines for the treatment of cancer. The Company’s pipeline consists of small molecule drug candidates that target cancer signaling pathways. KO-539, a potent and selective menin inhibitor, is currently in a Phase 1b clinical trial (KOMET-001) for patients with relapsed/refractory AML, including patients with NPM1 mutations or KMT2A rearrangements. Tipifarnib, a potent, selective and orally bioavailable farnesyl transferase inhibitor, has received Breakthrough Therapy Designation for the treatment of patients with HRAS mutant HNSCC and is currently in a registration-directed study (AIM-HN) in patients with this devastating disease. In addition, Kura is pursuing the use of tipifarnib in combination with other oncology therapeutics to address larger genetic subsets of patients, including those who have HRAS- and/or PIK3CA-dependent HNSCC. The Company is also developing KO-2806, a next-generation farnesyl transferase inhibitor, which is intended to target innovative biology and larger oncology indications through rational combinations. For additional information about Kura, please visit the Company’s website at www.kuraoncology.com.

SOURCE: Kura Oncology

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