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Ref Type Journal Article
PMID (36409971)
Authors Klute KA, Rothe M, Garrett-Mayer E, Mangat PK, Nazemzadeh R, Yost KJ, Duvivier HL, Ahn ER, Cannon TL, Alese OB, Krauss JC, Thota R, Calfa CJ, Denlinger CS, O'Lone R, Halabi S, Grantham GN, Schilsky RL
Title Cobimetinib Plus Vemurafenib in Patients With Colorectal Cancer With BRAF Mutations: Results From the Targeted Agent and Profiling Utilization Registry (TAPUR) Study.
Journal JCO precision oncology
Vol 6
Date 2022 Nov
Abstract Text TAPUR is a phase II basket trial evaluating the antitumor activity of commercially available targeted agents in patients with advanced cancer and genomic alterations known to be drug targets. The results of a cohort of patients with colorectal cancer (CRC) with BRAF mutations treated with cobimetinib (C) plus vemurafenib (V) are reported.Eligible patients had advanced CRC, no standard treatment options, measurable disease (RECIST), Eastern Cooperative Oncology Group performance status 0-2, adequate organ function, tumors with BRAF V600E/D/K/R mutations, and no MAP2K1/2, MEK1/2, or NRAS mutations. C was taken 60 mg orally once daily for 21 days followed by seven days off, and V was taken 960 mg orally twice daily. Simon's two-stage design was used with a primary study end point of objective response or stable disease of at least 16 weeks duration. Secondary end points were progression-free survival, overall survival, and safety.Thirty patients were enrolled from August 2016 to August 2018; all had CRC with a BRAF V600E mutation except one patient with a BRAF K601E mutation. Three patients were not evaluable for efficacy. Eight patients with partial responses and six patients with stable disease of at least 16 weeks duration were observed for disease control and objective response rates of 52% (95% CI, 35 to 65) and 30% (95% CI, 14 to 50), respectively. The null hypothesis of 15% disease control rate was rejected (P < .0001). Thirteen patients had at least one grade 3 adverse event or serious adverse event at least possibly related to C + V: anemia, decreased lymphocytes, dyspnea, diarrhea, elevated liver enzymes, fatigue, hypercalcemia, hypophosphatemia, rash, photosensitivity, and upper gastrointestinal hemorrhage.The combination of C + V has antitumor activity in heavily pretreated patients with CRC with BRAF mutations.


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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 sensitive Cobimetinib + Vemurafenib Phase II Actionable In a Phase II trial (TAPUR), the combination of Cotellic (cobimetinib) and Zelboraf (vemurafenib) resulted in an objective response rate of 30% (8/27; all partial responses), a disease control rate of 52% (14/27), a median progression-free survival of 15.7 weeks, and a median overall survival of 38.9 weeks in patients with colorectal cancer harboring BRAF V600E (n=26) or K601E (n=1) (PMID: 36409971; NCT02693535). 36409971