Reference Detail

Ref Type

Journal Article

PMID

(29950351)

Authors

Lim HY, Merle P, Weiss KH, Yau T, Ross P, Mazzaferro V, Blanc JF, Ma YT, Yen CJ, Kocsis J, Choo SP, Sukeepaisarnjaroen W, Gérolami R, Dufour JF, Gane EJ, Ryoo BY, Peck-Radosavljevic M, Dao T, Yeo W, Lamlertthon W, Thongsawat S, Teufel M, Roth K, Reis D, Childs BH, Krissel H, Llovet JM

Title

Phase II Studies with Refametinib or Refametinib plus Sorafenib in Patients with RAS-Mutated Hepatocellular Carcinoma.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Clinical cancer research : an official journal of the American Association for Cancer Research	24	19	2018 Oct 01	4650-4661	Clin Cancer Res

URL

Abstract Text

Purpose: Refametinib, an oral MEK inhibitor, has demonstrated antitumor activity in combination with sorafenib in patients with RAS-mutated hepatocellular carcinoma (HCC). Two phase II studies evaluated the efficacy of refametinib monotherapy and refametinib plus sorafenib in patients with RAS-mutant unresectable or metastatic HCC.Patients and Methods: Eligible patients with RAS mutations of cell-free circulating tumor DNA (ctDNA) determined by beads, emulsion, amplification, and magnetics technology received twice-daily refametinib 50 mg ± sorafenib 400 mg. Potential biomarkers were assessed in ctDNA via next-generation sequencing (NGS).Results: Of 1,318 patients screened, 59 (4.4%) had a RAS mutation, of whom 16 received refametinib and 16 received refametinib plus sorafenib. With refametinib monotherapy, the objective response rate (ORR) was 0%, the disease control rate (DCR) was 56.3%, overall survival (OS) was 5.8 months, and progression-free survival (PFS) was 1.9 months. With refametinib plus sorafenib, the ORR was 6.3%, the DCR was 43.8%, OS was 12.7 months, and PFS was 1.5 months. In both studies, time to progression was 2.8 months. Treatment-emergent toxicities included fatigue, hypertension, and acneiform rash. Twenty-seven patients had ctDNA samples available for NGS. The most frequently detected mutations were in TERT (63.0%), TP53 (48.1%), and β-catenin (CTNNB1; 37.0%).Conclusions: Prospective testing for RAS family mutations using ctDNA was a feasible, noninvasive approach for large-scale mutational testing in patients with HCC. A median OS of 12.7 months with refametinib plus sorafenib in this small population of RAS-mutant patients may indicate a synergistic effect between sorafenib and refametinib-this preliminary finding should be further explored. Clin Cancer Res; 24(19); 4650-61. ©2018 AACR.

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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 mutant	hepatocellular carcinoma	sensitive	Refametinib + Sorafenib	Phase II	Actionable	In a Phase II trial, Refametinib (BAY86-9766) and Nexavar (sorafenib) combination treatment resulted in an objective response rate of 6.3% (1/16), a disease control rate of 43.8% (7/16), an overall survival of 12.7 months, and a progression-free survival of 1.5 months in patients unresectable or metastatic hepatocellular carcinoma harboring RAS (NRAS and KRAS) mutations (PMID: 29950351; NCT01915602).	29950351