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Ref Type Journal Article
PMID (36113242)
Authors Mao L, Guo J, Zhu L, Jiang Y, Yan W, Zhang J, Hui AM, Yang Y, Diao L, Tan Y, Zhao H, Jiang Y, Wu Z, Si L
Title A first-in-human, phase 1a dose-escalation study of the selective MEK1/2 inhibitor FCN-159 in patients with advanced NRAS-mutant melanoma.
Abstract Text A phase 1a first-in-human study evaluated the safety/tolerability, preliminary antitumour activity and pharmacokinetics of the oral MEK1/2 inhibitor FCN-159 in Chinese patients with advanced, NRAS-mutant melanoma.Patients received a single FCN-159 dose at assigned levels, proceeding to continuous dosing (once daily [QD] for 28-day cycles) if no dose-limiting toxicities (DLTs) occurred within the next 3 days. Dose escalation was initiated after review of data for the previous dose level. The primary end-point was incidence of DLTs after the first dose.Thirty-three patients were enrolled across nine FCN-159 dose groups (0.2-15 mg QD). One DLT occurred: grade 3 folliculitis in the 15-mg group. There was one grade >3 treatment-emergent adverse event (TEAE), death of unknown aetiology (not FCN-159 related). The most common FCN-159-related TEAE was rash (36.4%), and the incidence of grade ≥3 FCN-159-related TEAEs was 15.2%. Antitumour activity at QD doses <6 mg was limited; therefore, efficacy data are presented only for doses ≥6 mg (n = 21). The objective response and clinical benefit rates were 19.0% (four partial responses) and 52.4%, respectively. Median (95% confidence interval) duration of response and progression-free survival were 4.8 months (2.8-not reached) and 3.8 months (1.8-5.6), respectively. FCN-159 exposure increased dose-proportionately; geometric mean terminal half-life was 29.9-56.9 h.FCN-159 was well tolerated and demonstrated promising antitumour activity at doses ≥6 mg QD in patients with advanced, NRAS-mutant melanoma. The recommended phase 2 dose was 12 mg QD.NCT03932253.


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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
NRAS act mut melanoma predicted - sensitive FCN-159 Phase I Actionable In a Phase I trial (FCN-159-001), FCN-159 treatment was well tolerated in melanoma patients harboring NRAS activating mutations and resulted in an objective response rate (ORR) of 19% (4/21, all partial responses), a clinical benefit rate (CBR) of 52.4% (11/21), and a median progression-free survival (mPFS) of 3.8 mo across all doses tested, and a CBR of 50% (3/6), mPFS of 3.8 mo at the RP2D dose of 12mg (PMID: 36113242; NCT03932253). 36113242