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|Ref Type||Journal Article|
|Authors||Hanna GJ, Guenette JP, Chau NG, Sayehli CM, Wilhelm C, Metcalf R, Wong DJ, Brose M, Razaq M, Pérez-Ruiz E, Cohen EEW, Aggarwal R, Scholz C, Gualberto A, Ho AL|
|Title||Tipifarnib in recurrent, metastatic HRAS-mutant salivary gland cancer.|
|Date||2020 Jun 18|
|Abstract Text||To the authors' knowledge, there are no approved therapies for recurrent, metastatic (R/M) salivary gland carcinoma (SGC), but molecularly targeted therapies warrant ongoing investigation. In the current study, the authors have reported on the efficacy of tipifarnib in patients with aggressive HRAS-mutant, R/M SGC.The current prospective, nonrandomized, multicenter, international cohort study involved 8 centers and was conducted from May 2015 to June 2019. The median follow-up was 22 months (range, 6-55 months). Subjects with HRAS-mutant R/M SGC (any histology) and disease progression within the last 6 months were enrolled. Tipifarnib was dosed orally twice daily. The authors determined the objective response rate using Response Evaluation Criteria in Solid Tumors (version 1.1), duration of response, and molecular predictors of response.A total of 13 patients with R/M SGC were enrolled; all had received prior systemic therapy (1-3 regimens). One objective response was observed; an additional 7 of 12 evaluable patients (58%) had stable disease as their best response with a median duration of 9 months (range, 3-14 months). Five of 7 patients had >10% tumor regression and 6 of 7 had stable disease lasting >6 months. Q61R was the most frequent activating HRAS mutation noted (7 of 13 patients; 54%), but gene variant and allele frequency did not correlate with outcomes. The median progression-free survival was 7 months (95% confidence interval, 5.9-10.1 months), and the median overall survival was 18 months (95% confidence interval, 9.6-22.4 months) with approximately 58.6% of patients alive at 1 year. Survival was similar regardless of HRAS mutant variant or co-occurring PIK3CA alterations. No participant discontinued treatment because of toxicity.Tipifarnib resulted in modest clinical activity with a promising disease control rate among patients with HRAS-mutant, R/M SGC who developed disease progression within the last 6 months.|
|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|
|Tipifarnib||Zarnestra|R115777||Farnesyltransferase Inhibitor 3||Zarnestra (tipifarnib) is a farnesyltransferase inhibitor, which alters post-translational modification and activation of Ras proteins, and may result in decreased tumor cell proliferation and reduced tumor growth (PMID: 11196150, PMID: 25323927, PMID: 32557577).|
|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 act mut||salivary gland carcinoma||sensitive||Tipifarnib||Clinical Study||Actionable||In a clinical study, Zarnestra (tipifarnib) treatment resulted in an overall response rate of 8% (n=13) with one ongoing partial response with a duration of 14 months and stable disease as the best response in 58% (7/12) of evaluable patients with HRAS-mutant metastatic salivary gland carcinoma, and a median overall survival of 18 months, and a median progression-free survival of 7 months (PMID: 32557577).||32557577|