Cited by 900Colorectal Cancer Treatments and StudiesColorectal Cancer Surgical TreatmentsIntraperitoneal and Appendiceal Malignancies

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Effect of First-Line Chemotherapy Combined With Cetuximab or Bevacizumab on Overall Survival in Patients With KRAS Wild-Type Advanced or Metastatic Colorectal Cancer: A Randomized Clinical Trial

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Abstract

Importance: Combining biologic monoclonal antibodies with chemotherapeutic cytotoxic drugs provides clinical benefit to patients with advanced or metastatic colorectal cancer, but the optimal choice of the initial biologic therapy in previously untreated patients is unknown. Objective: To determine if the addition of cetuximab vs bevacizumab to the combination of leucovorin, fluorouracil, and oxaliplatin (mFOLFOX6) regimen or the combination of leucovorin, fluorouracil, and irinotecan (FOLFIRI) regimen is superior as first-line therapy in advanced or metastatic KRAS wild-type (wt) colorectal cancer. Design, Setting, and Participants: Patients (≥18 years) enrolled at community and academic centers throughout the National Clinical Trials Network in the United States and Canada (November 2005-March 2012) with previously untreated advanced or metastatic colorectal cancer whose tumors were KRAS wt chose to take either the mFOLFOX6 regimen or the FOLFIRI regimen as chemotherapy and were randomized to receive either cetuximab (n = 578) or bevacizumab (n = 559). The last date of follow-up was December 15, 2015. Interventions: Cetuximab vs bevacizumab combined with either mFOLFOX6 or FOLFIRI chemotherapy regimen chosen by the treating physician and patient. Main Outcomes and Measures: The primary end point was overall survival. Secondary objectives included progression-free survival and overall response rate, site-reported confirmed or unconfirmed complete or partial response. Results: Among 1137 patients (median age, 59 years; 440 [39%] women), 1074 (94%) of patients met eligibility criteria. As of December 15, 2015, median follow-up for 263 surviving patients was 47.4 months (range, 0-110.7 months), and 82% of patients (938 of 1137) experienced disease progression. The median overall survival was 30.0 months in the cetuximab-chemotherapy group and 29.0 months in the bevacizumab-chemotherapy group with a stratified hazard ratio (HR) of 0.88 (95% CI, 0.77-1.01; P = .08). The median progression-free survival was 10.5 months in the cetuximab-chemotherapy group and 10.6 months in the bevacizumab-chemotherapy group with a stratified HR of 0.95 (95% CI, 0.84-1.08; P = .45). Response rates were not significantly different, 59.6% vs 55.2% for cetuximab and bevacizumab, respectively (difference, 4.4%, 95% CI, 1.0%-9.0%, P = .13). Conclusions and Relevance: Among patients with KRAS wt untreated advanced or metastatic colorectal cancer, there was no significant difference in overall survival between the addition of cetuximab vs bevacizumab to chemotherapy as initial biologic treatment. Trial Registration: clinicaltrials.gov identifier: NCT00265850.

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Authors
Venook, A. P., Niedzwiecki, D., Lenz, H.-J., Innocenti, F., Fruth, B., Meyerhardt, J. A., Schrag, D., Greene, C., O'Neil, B. H., Atkins, J. N., Berry, S., Polite, B. N., O'Reilly, E. M., Goldberg, R. M., Hochster, H. S., Schilsky, R. L., Bertagnolli, M. M., El-Khoueiry, A. B., Watson, P., Benson, A. B., Mulkerin, D. L., Mayer, R. J., & Blanke, C.
Affiliations
  • University of California, San Francisco (US)
  • Duke University (US)
  • University of Southern California (US)
  • University of North Carolina at Chapel Hill (US)
  • Mayo Clinic (US)
  • Dana-Farber/Partners CancerCare, Boston, Massachusetts
  • Indiana University, Simon Cancer Center, Indianapolis
  • Southeastern Medical Oncology Center (US)
  • Sunnybrook Health Science Centre (CA)
  • University of Chicago Comprehensive Cancer Center, Chicago, Illinois
  • Memorial Sloan Kettering Cancer Center (US)
  • The Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (US)
  • Department of Medical Oncology, Yale University School of Medicine, New Haven, Connecticut
  • American Society of Clinical Oncology (US)
  • Brigham and Women's Hospital (US)
  • Kinston Medical Specialists (US)
  • Northwestern University (US)
  • University of Wisconsin–Madison (US)
  • Oregon Health & Science University (US)
Venue
JAMA
Published
2017-06-20
Volume
317
Issue
23
Pages
2392
ISSN
  • 0002-9955 (ISSN-L)
  • 0098-7484
OpenAlex
W2712978371
Cited by
898
References
24
Citations by year
2026: 66 · 2025: 76 · 2024: 87 · 2023: 104 · 2022: 118 · 2021: 118 · 2020: 122 · 2019: 107 · 2018: 82 · 2017: 16
FWCI
39.43
Type
journal article
Language
en
Open access
Locations
  • JAMA (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (UL1TR001863)
  • National Cancer Institute (U10CA180882, K05CA169384, U10CA180820, U10CA180791, U10CA180888, U10CA180836, U10CA180790, U10CA180830, U10CA180795, U10CA180850, R01CA149222, U10CA180838, U10CA180867, U10CA180821, U10CA180799)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Surgical Treatments
  • Health Sciences › Medicine › Surgery › Intraperitoneal and Appendiceal Malignancies
Keywords
metastatic colorectal cancer, KRAS wild-type, cetuximab, bevacizumab, first-line chemotherapy, mFOLFOX6, FOLFIRI, oxaliplatin, irinotecan, monoclonal antibodies, overall survival, progression-free survival, anti-EGFR therapy, anti-VEGF therapy, community oncology
MeSH terms
Bevacizumab, Cetuximab, Adult, Aged, Aged, 80 and over, Antineoplastic Agents, Antineoplastic Combined Chemotherapy Protocols, Camptothecin, Canada, Leucovorin, Female, Fluorouracil, Humans, Male, Middle Aged, Organoplatinum Compounds, Genes, ras, United States, Colorectal Neoplasms, Treatment Outcome, Disease-Free Survival, Angiogenesis Inhibitors, Kaplan-Meier Estimate

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