Reference Detail

Ref Type Journal Article
PMID (30120161)
Authors García-Alfonso P, Benavides M, Falcó E, Muñoz A, Gómez A, Sastre J, Rivera F, Montagut C, Salgado M, López-Ladrón A, López R, Ruiz de Mena I, Durán G, Aranda E, null null
Title Single-Agent Regorafenib in Metastatic Colorectal Cancer Patients with Any RAS or BRAF Mutation Previously Treated with FOLFOXIRI plus Bevacizumab (PREVIUM Trial).
Journal The oncologist
Vol 23
Issue 11
Date 2018 Nov
URL
Abstract Text RAS- or BRAF-mutated metastatic colorectal cancers (mCRCs) progressing after first-line treatment have a poor prognosis.European and U.S. guidelines include the multikinase inhibitor regorafenib as a standard option for second-line therapy and beyond, based on the results of the randomized phase III CORRECT trial demonstrating improvement in survival.Although stopped prematurely for failing to accrue, the PREVIUM trial, the first prospective interventional study exploring regorafenib as second-line treatment for patients with mCRC bearing RAS or BRAF mutations, failed to demonstrate clinical activity in the population analyzed.Patients with RAS- or BRAF-mutated (mut) metastatic colorectal cancer (mCRC) progressing on first-line bevacizumab plus 5-FU/irinotecan/oxaliplatin (FOLFOXIRI) have a poor prognosis. We aimed to assess the efficacy and safety of regorafenib in this population.Regorafenib was administered daily for 3 weeks of each 4-week cycle until disease progression or other reason. The primary endpoint was 6-month progression-free survival (PFS).KRAS, NRAS, or BRAF was mutated in mCRC samples in 60%, 20%, and 13% of patients, respectively. Median time from initial diagnosis of metastases to the start of regorafenib and treatment duration was 13.8 months and 7 weeks, respectively. Reasons for discontinuation included disease progression (80%), investigator decision (13%), and adverse events (AEs; 7%). Seven patients (47%) required dose reduction, mostly for asthenia (43%). The most common regorafenib-related grade 3 AEs were asthenia (33%), dysphonia (13%), and hypertension (13%) (Table 1). There were no grade 4 toxicities. No patient was progression-free at 6 months. Median PFS, time to progression (TTP), and overall survival (OS) were 2.2, 2.0, and 3.3 months, respectively.Although stopped prematurely for failing to accrue, in the population analyzed, regorafenib failed to demonstrate clinical activity in KRAS- or BRAF-mutated mCRC with progression following first-line with FOLFOXIRI plus bevacizumab, although tolerability was acceptable. Our trial suggests that exploring regorafenib efficacy in an earlier line of therapy should not be undertaken without better population refinement.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Therapy Description
Drug Name Trade Name Synonyms Drug Classes Drug Description
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
KRAS mutant colorectal cancer no benefit Regorafenib Phase II Actionable In a Phase II clinical trial (PREVIUM), Stivarga (regorafenib) treatment resulted in 0% (0/15) 6-month progression free survival (PFS), a 2.2-month median PFS, and a median overall survival of 3.3 months in metastatic colorectal cancer patients with KRAS (n=9), NRAS (n=3) or BRAF (n=2) mutations who failed first line therapy; however, the trial was terminated early due to poor accrual (PMID: 30120161; NCT02175654). 30120161
KRAS mutant colorectal cancer no benefit Regorafenib Phase III Actionable In a Phase III trial (CONSIGN), Stivarga (regorafenib) treatment demonstrated safety profile and efficacy consistent with previous studies, median progression-free survival (PFS) was 2.7 months overall, 2.8 months in KRAS wild-type, and 2.5 months in KRAS mutant colorectal cancer patients, and with no difference in KRAS status between long and short PFS groups (PMID: 30190299; NCT01538680). 30190299
NRAS mutant colorectal cancer no benefit Regorafenib Phase II Actionable In a Phase II clinical trial (PREVIUM), Stivarga (regorafenib) treatment resulted in 0% (0/15) 6-month progression free survival (PFS), a 2.2-month median PFS, and a median overall survival of 3.3 months in metastatic colorectal cancer patients with KRAS (n=9), NRAS (n=3) or BRAF (n=2) mutations who failed first line therapy; however, the trial was terminated early due to poor accrual (PMID: 30120161; NCT02175654). 30120161
BRAF mutant colorectal cancer no benefit Regorafenib Phase II Actionable In a Phase II clinical trial (PREVIUM), Stivarga (regorafenib) treatment resulted in 0% (0/15) 6-month progression free survival (PFS), a 2.2-month median PFS, and a median overall survival of 3.3 months in metastatic colorectal cancer patients with KRAS (n=9), NRAS (n=3) or BRAF (n=2) mutations who failed first line therapy; however, the trial was terminated early due to poor accrual (PMID: 30120161; NCT02175654). 30120161