On July 6, 2021 Kura Oncology, Inc. (Nasdaq: KURA), a clinical-stage biopharmaceutical company committed to realizing the promise of precision medicines for the treatment of cancer, reported a clinical collaboration with Novartis to evaluate the combination of tipifarnib and alpelisib in patients with head and neck squamous cell carcinoma (HNSCC) whose tumors have HRAS overexpression or PIK3CA mutation and/or amplification. Tipifarnib is Kura’s farnesyl transferase inhibitor drug candidate currently in a registration-directed trial as a monotherapy in patients with HRAS mutant HNSCC. Novartis’ alpelisib is an inhibitor of phosphatidylinositol-3-kinase (PI3K) with inhibitory activity predominantly against the PI3Kα isoform.
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"Our preclinical data suggest that HRAS and PI3Kα are co-dependent pathways involved in the development and maintenance of HNSCC in certain patient populations. Combining tipifarnib with alpelisib has the potential to provide a clinically meaningful increase in anti-tumor activity compared to when inhibiting either pathway alone," said Stephen Dale, M.D., Chief Medical Officer of Kura Oncology. "We believe this clinical collaboration will enable us to potentially expand the use of tipifarnib to a significantly higher percentage of patients with advanced HNSCC. We look forward to initiating the combination trial in the second half of 2021."
The Phase 1/2 KURRENT trial is a biomarker-defined cohort study designed to evaluate the safety, determine the recommended combination dosing and assess early anti-tumor activity of tipifarnib and alpelisib for the treatment of HNSCC patients whose tumors are dependent on HRAS and/or PI3Kα pathways, which is approximately 50% of HSNCC patients, according to The Cancer Genome Atlas (TCGA).
Under the collaboration, Kura maintains global development and commercial rights to tipifarnib.
About HNSCC
Head and neck squamous cell carcinoma (HNSCC) is the seventh most common cancer worldwide, accounting for more than 500,000 new cases each year. Despite advances in immunotherapy, the prognosis for advanced HNSCC patients remains poor, with an estimated median overall survival of 13-15 months in patients when stratified by PD-L1 expression. Although the anti-epidermal growth factor receptor (EGFR) antibody, cetuximab, was approved more than a decade ago, development of biomarker-directed therapies in HNSCC has been stymied by the limited number of druggable targets in the genomic landscape and the challenge of managing drug refractory recurrent/metastatic HNSCC.
About Tipifarnib
Tipifarnib, is a potent, selective and orally bioavailable inhibitor of farnesyl transferase, which has been granted Breakthrough Therapy and Fast Track Designations by the FDA for the treatment of patients with HRAS mutant HNSCC. In addition to HNSCC, tipifarnib has demonstrated encouraging clinical activity in multiple additional genetically defined tumor types. Kura has received multiple issued patents for tipifarnib, providing patent exclusivity in the U.S. and foreign countries.