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	Vol	Issue	Date	Pages	Journal Short Title
The oncologist	23	11	2018 Nov	1271-e128	Oncologist

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	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	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
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