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Ref Type Journal Article
PMID (28363909)
Authors van Geel RMJM, Tabernero J, Elez E, Bendell JC, Spreafico A, Schuler M, Yoshino T, Delord JP, Yamada Y, Lolkema MP, Faris JE, Eskens FALM, Sharma S, Yaeger R, Lenz HJ, Wainberg ZA, Avsar E, Chatterjee A, Jaeger S, Tan E, Maharry K, Demuth T, Schellens JHM
Title A Phase Ib Dose-Escalation Study of Encorafenib and Cetuximab with or without Alpelisib in Metastatic BRAF-Mutant Colorectal Cancer.
Abstract Text Preclinical evidence suggests that concomitant BRAF and EGFR inhibition leads to sustained suppression of MAPK signaling and suppressed tumor growth in BRAFV600E colorectal cancer models. Patients with refractory BRAFV600-mutant metastatic CRC (mCRC) were treated with a selective RAF kinase inhibitor (encorafenib) plus a monoclonal antibody targeting EGFR (cetuximab), with (n = 28) or without (n = 26) a PI3Kα inhibitor (alpelisib). The primary objective was to determine the maximum tolerated dose (MTD) or a recommended phase II dose. Dose-limiting toxicities were reported in 3 patients receiving dual treatment and 2 patients receiving triple treatment. The MTD was not reached for either group and the phase II doses were selected as 200 mg encorafenib (both groups) and 300 mg alpelisib. Combinations of cetuximab and encorafenib showed promising clinical activity and tolerability in patients with BRAF-mutant mCRC; confirmed overall response rates of 19% and 18% were observed and median progression-free survival was 3.7 and 4.2 months for the dual- and triple-therapy groups, respectively.Significance: Herein, we demonstrate that dual- (encorafenib plus cetuximab) and triple- (encorafenib plus cetuximab and alpelisib) combination treatments are tolerable and provide promising clinical activity in the difficult-to-treat patient population with BRAF-mutant mCRC. Cancer Discov; 7(6); 610-9. ©2017 AACR.See related commentary by Sundar et al., p. 558This article is highlighted in the In This Issue feature, p. 539.


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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 colorectal cancer sensitive Alpelisib + Cetuximab + Encorafenib Phase Ib/II Actionable In a Phase Ib/II trial, the triple combination therapy of Encorafenib (LGX818), Erbitux (cetuximab), and Alpelisib (BYL719) resulted in an overall response rate of 18% (5/28), including 5 patients with a partial response, and led to a median progression free survival of 4.2 months and response duration of 12 weeks (PMID: 28363909). detail... 28363909
BRAF mutant colorectal cancer sensitive Cetuximab + Encorafenib Phase Ib/II Actionable In a Phase Ib/II trial, the combination therapy of Erbitux (cetuximab) and Encorafenib (LGX818) in colorectal cancer patients harboring a BRAF mutation resulted in an overall response rate of 19% (5/26), including 1 patient with a complete response and 4 patients with a partial response, and led to a median progression free survival of 3.7 months and response duration of 46 weeks (PMID: 28363909). 28363909