451. A Phase II Study of FOLFOXIRI Plus Panitumumab Followed by Evaluation for Resection in Patients With Metastatic KRAS Wild-Type Colorectal Cancer With Liver Metastases Only.
- Author
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Bendell JC, Zakari A, Peyton JD, Boccia R, Moskowitz M, Gian V, Lipman A, Waterhouse D, LoCicero R, Earwood C, Lane CM, and Meluch A
- Subjects
- Antibodies, Monoclonal adverse effects, Antineoplastic Combined Chemotherapy Protocols adverse effects, Camptothecin adverse effects, Camptothecin therapeutic use, Colorectal Neoplasms genetics, Colorectal Neoplasms pathology, Disease-Free Survival, Drug Administration Schedule, Female, Fluorouracil adverse effects, Fluorouracil therapeutic use, Humans, Leucovorin adverse effects, Leucovorin therapeutic use, Liver Neoplasms genetics, Liver Neoplasms secondary, Male, Middle Aged, Organoplatinum Compounds adverse effects, Organoplatinum Compounds therapeutic use, Panitumumab, Treatment Outcome, Antibodies, Monoclonal therapeutic use, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Camptothecin analogs & derivatives, Colorectal Neoplasms drug therapy, Liver Neoplasms drug therapy, Liver Neoplasms surgery, Proto-Oncogene Proteins p21(ras) genetics
- Abstract
Background: Patients with liver-only metastatic colorectal cancer (mCRC) who are not candidates for potentially curative resection may become resectable with more aggressive chemotherapy regimens. In this nonrandomized trial, we evaluated folinic acid, 5-fluorouracil (5-FU), oxaliplatin, and irinotecan (FOLFOXIRI) plus the epidermal growth factor receptor inhibitor panitumumab as first-line treatment for KRAS wild-type mCRC with liver-only metastasis., Methods: Patients received FOLFOXIRI (5-FU, 3,200 mg/m(2), 48-hour continuous intravenous (i.v.) infusion; leucovorin, 200 mg/m(2) i.v.; irinotecan, 125 mg/m(2); oxaliplatin, 85 mg/m(2) i.v.) and panitumumab (6 mg/kg i.v.) on day 1 of 14-day cycles. Patients were restaged and evaluated for surgery every four cycles. Planned enrollment was originally 49 patients. The primary endpoint was objective response rate., Results: Fifteen patients (median age: 55 years; 87% male) received a median 6 cycles of treatment (range: 1-33 cycles); 10 patients (67%) were surgical candidates at baseline. Twelve patients were evaluable for clinical response; 9 (60%) achieved partial response. Ten patients underwent surgery; all were complete resections and pathologic partial response. Treatment-related grade 3 adverse events included diarrhea (33%) and rash (20%). Enrollment was halted because of emerging data on expanded KRAS/NRAS mutations beyond the region we initially examined, and the potential for negative interaction with oxaliplatin-based therapy. Eight patients underwent expanded KRAS/NRAS analysis outside exon 2; no additional mutations were found., Conclusion: KRAS/NRAS mutations outside the region tested in this study were recently shown to be associated with inferior survival on similar treatment regimens. Therefore, this trial was stopped early. This regimen remains a viable option for patients with liver-only mCRC in the KRAS/NRAS wild-type population. Enrollment criteria on future studies should include testing for the newly identified mutations., (©AlphaMed Press; the data published online to support this summary is the property of the authors.)
- Published
- 2016
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