Reference Detail

Ref Type

Journal Article

PMID

(37352476)

Authors

Stintzing S, Heinrich K, Tougeron D, Modest DP, Schwaner I, Eucker J, Pihusch R, Stauch M, Kaiser F, Kahl C, Karthaus M, Müller C, Burkart C, Reinacher-Schick A, Kasper-Virchow S, Fischer von Weikersthal L, Krammer-Steiner B, Prager GW, Taieb J, Heinemann V

Title

FOLFOXIRI Plus Cetuximab or Bevacizumab as First-Line Treatment of BRAFV600E-Mutant Metastatic Colorectal Cancer: The Randomized Phase II FIRE-4.5 (AIO KRK0116) Study.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Journal of clinical oncology : official journal of the American Society of Clinical Oncology			2023 Jun 23	JCO2201420	J Clin Oncol

URL

Abstract Text

BRAFV600E mutation is associated with a poor outcome in metastatic colorectal cancer (mCRC). This clinical trial investigated the efficacy of triplet chemotherapy (fluorouracil, folinic acid, oxaliplatin, and irinotecan) combined with either cetuximab or bevacizumab in patients with previously untreated BRAFV600E-mutant mCRC.In this controlled, randomized, open-label phase II trial, 109 patients were randomly assigned, 107 of whom were included into the full analysis set (FAS). Patients were randomly assigned in a 2:1 ratio to receive either FOLFOXIRI plus cetuximab in the experimental arm (n = 72) or FOLFOXIRI plus bevacizumab in the control arm (n = 35). The primary end point was objective response rate (ORR) according to RECIST 1.1., evaluated in patients treated according to protocol (ATP population). Progression-free survival (PFS), overall survival (OS), toxicity, and feasibility were analyzed as secondary end points.Eighteen patients discontinued study treatment before the first tumor assessment, thus resulting in the ATP population of 89 patients. In these patients, ORR was 51% (30/59) in the cetuximab-based experimental arm and 67% (20/30) in the bevacizumab-based control arm (odds ratio, 1.93; 80% CI, 1.06 to 3.52; P = .92 [one-sided]). In the full analysis set, median PFS was significantly inferior in the experimental arm (6.7 months v 10.7 months; hazard ratio [HR], 1.89; P = .006). Median OS analyzed at an event rate of 64.5% showed a trend toward shorter survival in cetuximab-treated patients (12.9 months v 17.1 months; HR, 1.4; P = .20).To our knowledge, FIRE-4.5 is the first prospective and randomized study investigating first-line treatment of BRAFV600E-mutant mCRC. FOLFOXIRI plus cetuximab does not induce a higher ORR when compared with FOLFOXIRI plus bevacizumab in first-line treatment of BRAFV600E-mutant mCRC. Bevacizumab-based chemotherapy remains the preferable first-line treatment of patients with BRAFV600E-mutant mCRC.

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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 V600E	colorectal cancer	no benefit	Cetuximab + Fluorouracil + Irinotecan + Leucovorin + Oxaliplatin	Phase II	Actionable	In a Phase II trial (FIRE-4.5), the combination of Erbitux (cetuximab) with FOLFOXIRI as first-line therapy did not result in an improved objective response rate (ORR) compared to Avastin (bevacizumab) with FOLFOXIRI, with an ORR of 50.8% (30/59) vs 66.7% (20/30) (P=0.92), a median progression-free survival of 7.6 vs 12.4 months (P=0.003), and a median overall survival of 15.2 vs 22.9 months (P=0.14), respectively, in metastatic colorectal cancer patients harboring BRAF V600E (PMID: 37352476).	37352476