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Ref Type Journal Article
PMID (33750196)
Authors Ho AL, Brana I, Haddad R, Bauman J, Bible K, Oosting S, Wong DJ, Ahn MJ, Boni V, Even C, Fayette J, Flor MJ, Harrington K, Kim SB, Licitra L, Nixon I, Saba NF, Hackenberg S, Specenier P, Worden F, Balsara B, Leoni M, Martell B, Scholz C, Gualberto A
Title Tipifarnib in Head and Neck Squamous Cell Carcinoma With HRAS Mutations.
Journal Journal of clinical oncology : official journal of the American Society of Clinical Oncology
Vol
Issue
Date 2021 Mar 22
URL
Abstract Text Mutations in the HRAS (mHRAS) proto-oncogene occur in 4%-8% of patients with recurrent and/or metastatic (R/M) head and neck squamous cell carcinoma (HNSCC). Tipifarnib is a farnesyltransferase inhibitor that disrupts HRAS function. We evaluated the efficacy of tipifarnib in patients with R/M mHRAS HNSCC.We enrolled 30 patients with R/M HNSCC in a single-arm, open-label phase II trial of tipifarnib for mHRAS malignancies; one additional patient was treated on an expanded access program. After an ad hoc analysis of the first 16 patients with HNSCC with mHRAS variant allele frequency (VAF) data, enrollment was limited to those with a mHRAS VAF of ≥ 20% (high VAF). The primary end point was objective response rate. Secondary end points included assessing safety and tolerability. Patients received tipifarnib 600 or 900 mg orally twice daily on days 1-7 and 15-21 of 28-day cycles.Of the 22 patients with HNSCC with high VAF, 20 were evaluable for response at the time of data cutoff. Objective response rate for evaluable patients with high-VAF HNSCC was 55% (95% CI, 31.5 to 76.9). Median progression-free survival on tipifarnib was 5.6 months (95% CI, 3.6 to 16.4) versus 3.6 months (95% CI, 1.3 to 5.2) on last prior therapy. Median overall survival was 15.4 months (95% CI, 7.0 to 29.7). The most frequent treatment-emergent adverse events among the 30 patients with HNSCC were anemia (37%) and lymphopenia (13%).Tipifarnib demonstrated encouraging efficacy in patients with R/M HNSCC with HRAS mutations for whom limited therapeutic options exist (NCT02383927).

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
HRAS mutant head and neck squamous cell carcinoma predicted - sensitive Tipifarnib Phase II Actionable In a Phase II trial (KO-TIP-001), Zarnestra (tipifarnib) treatment resulted in an objective response rate of 55% (11/20) in patients with head and neck squamous cell carcinoma harboring HRAS missense mutations at a variant allele frequency over 20%, with nine patients achieved stable disease and a median progression-free survival of 5.6 months (PMID: 33750196; NCT02383927). 33750196