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Ref Type | Journal Article | ||||||||||||
PMID | (18316547) | ||||||||||||
Authors | Giusti RM, Shastri K, Pilaro AM, Fuchs C, Cordoba-Rodriguez R, Koti K, Rothmann M, Men AY, Zhao H, Hughes M, Keegan P, Weiss KD, Pazdur R | ||||||||||||
Title | U.S. Food and Drug Administration approval: panitumumab for epidermal growth factor receptor-expressing metastatic colorectal carcinoma with progression following fluoropyrimidine-, oxaliplatin-, and irinotecan-containing chemotherapy regimens. | ||||||||||||
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Abstract Text | To describe the Food and Drug Administration review and marketing approval considerations for panitumumab (Vectibix) for the third-line treatment of patients with epidermal growth factor receptor-expressing metastatic colorectal carcinoma.Food and Drug Administration reviewed a single, open-label, multicenter trial in which 463 patients with epidermal growth factor receptor-expressing metastatic colorectal cancer who had progressed on or following treatment with a regimen containing a fluoropyrimidine, oxaliplatin, and irinotecan were randomized (1:1) to receive best supportive care (BSC) with or without panitumumab (6 mg/kg every other week) administered until disease progression or intolerable toxicity. Progression and response were confirmed by an independent review committee masked to treatment assignment. At progression, patients in the BSC-alone arm were eligible to receive panitumumab.Although median progression-free survival (PFS) was similar in both treatment arms ( approximately 8 weeks), the mean PFS was approximately 50% longer among patients receiving panitumumab than among those receiving BSC alone (96 versus 60 days, respectively) and the objective response rate in patients receiving panitumumab was 8%. However, no difference in overall survival was shown between the two study arms.Panitumumab received accelerated approval based on improvement in PFS and an independently confirmed response rate of 8%, similar to that observed with other active agents at this advanced stage of disease. Confirmation of clinical benefit will be required for full approval. |
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