Journal
CLINICAL CANCER RESEARCH
Volume 14, Issue 15, Pages 4836-4842Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1078-0432.CCR-07-4123
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Purpose: This study evaluated the safety, maximum tolerated dose, pharmacokinetics, and antitumor activity of sorafenib, a multikinase inhibitor, combined with paclitaxel and carboplatin in patients with solid tumors. Patients and Methods: Thirty-nine patients with advanced cancer (24 with melanoma) received oral sorafenib 100, 200, or 400 mg twice daily on days 2 to 19 of a 21-day cycle. All patients received carboplatin corresponding to AUC6 and 225 mg/m(2) paclitaxel on day 1. Pharmacokinetic analyses were done for sorafenib on days 2 and 19 of cycle 1 and for paclitaxel on day 1 of cycles 1 and 2. Pretreatment tumor samples from 17 melanoma patients were analyzed for BRAF mutations. Results: Sorafenib was well tolerated at the doses evaluated. The most frequent severe adverse events were hematologic toxicities (grade 3 or 4 in 33 patients, 85%). Twenty-seven (69%) patients had sorafenib-related adverse events, the most frequent of which were dermatologic events (26 patients, 67%). Exposure to paclitaxel was not altered by intervening treatment with sorafenib. Treatment with sorafenib, paclitaxel, and carboplatin resulted in one complete response and nine partial responses, all among patients with melanoma. There was no correlation between BRAF mutational status and treatment responses in patients with melanoma. Conclusions: The recommended phase II doses are oral 400 mg twice daily sorafenib, carboplatin at an AUC6 dose, and 225 mg/m(2) paclitaxel. The tumor responses observed with this combined regimen in patients with melanoma warrant further investigation.
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