Reference Detail

Ref Type

Journal Article

PMID

(32557577)

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.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Cancer			2020 Jun 18	3972-3981	Cancer

URL

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.

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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
Tipifarnib	Tipifarnib	25	8

Drug Name	Trade Name	Synonyms	Drug Classes	Drug Description
Tipifarnib		Zarnestra\|R115777	Farnesyltransferase Inhibitor 4	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