Reference Detail

Ref Type

Journal Article

PMID

(37219686)

Authors

Rasco DW, Medina T, Corrie P, Pavlick AC, Middleton MR, Lorigan P, Hebert C, Plummer R, Larkin J, Agarwala SS, Daud AI, Qiu J, Bozon V, Kneissl M, Barry E, Olszanski AJ

Title

Phase 1 study of the pan-RAF inhibitor tovorafenib in patients with advanced solid tumors followed by dose expansion in patients with metastatic melanoma.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Cancer chemotherapy and pharmacology	92	1	2023 Jul	15-28	Cancer Chemother Pharmacol

URL

Abstract Text

Genomic alterations of BRAF and NRAS are oncogenic drivers in malignant melanoma and other solid tumors. Tovorafenib is an investigational, oral, selective, CNS-penetrant, small molecule, type II pan‑RAF inhibitor. This first-in-human phase 1 study explored the safety and antitumor activity of tovorafenib.This two-part study in adult patients with relapsed or refractory advanced solid tumors included a dose escalation phase and a dose expansion phase including molecularly defined cohorts of patients with melanoma. Primary objectives were to evaluate the safety of tovorafenib administered once every other day (Q2D) or once weekly (QW), and to determine the maximum-tolerated and recommended phase 2 dose (RP2D) on these schedules. Secondary objectives included evaluation of antitumor activity and tovorafenib pharmacokinetics.Tovorafenib was administered to 149 patients (Q2D n = 110, QW n = 39). The RP2D of tovorafenib was defined as 200 mg Q2D or 600 mg QW. In the dose expansion phase, 58 (73%) of 80 patients in Q2D cohorts and 9 (47%) of 19 in the QW cohort had grade ≥ 3 adverse events. The most common of these overall were anemia (14 patients, 14%) and maculo-papular rash (8 patients, 8%). Responses were seen in 10 (15%) of 68 evaluable patients in the Q2D expansion phase, including in 8 of 16 (50%) patients with BRAF mutation-positive melanoma naïve to RAF and MEK inhibitors. In the QW dose expansion phase, there were no responses in 17 evaluable patients with NRAS mutation-positive melanoma naïve to RAF and MEK inhibitors; 9 patients (53%) had a best response of stable disease. QW dose administration was associated with minimal accumulation of tovorafenib in systemic circulation in the dose range of 400-800 mg.The safety profile of both schedules was acceptable, with QW dosing at the RP2D of 600 mg QW preferred for future clinical studies. Antitumor activity of tovorafenib in BRAF-mutated melanoma was promising and justifies continued clinical development across multiple settings.NCT01425008.

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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
BRAF mutant	melanoma	sensitive	Tovorafenib	Phase I	Actionable	In a Phase I trial, Ojemda (tovorafenib) treatment resulted in stable disease in 23% (5/22) of patients with advanced solid tumors in the dose escalation phase, an objective response rate of 15% (10/68) in the dose expansion phase with responses in 50% (8/16) of patients with RAF and MEK inhibitor-naive BRAF-mutant melanoma, an overall median duration of response of 6.0 months, and a median progression-free survival of 1.9 months (PMID: 37219686; NCT01425008).	37219686