Multicenter Phase II Study of Brequinar Sodium in Patients with Advanced Breast Cancer

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In this study, 34 patients with advanced breast cancer were treated with brequinar sodium: 75% of the patients were postmenopausal, and 94% had received chemotherapy previously; 50% had previously received an anthracycline-containing regimen. Brequinar was administered intravenously at a median weekly dose of 1,200 mg/m2. The toxicity was moderate, with 17 patients (50%) experiencing grade 3 or 4 toxicity. There were 33 patients evaluable for response: 4 patients (12%; 95% confidence interval, 3.4–28.2%) achieved partial responses, 10 patients (30%) were stable, and 19 patients (58%) had progressive disease. We conclude that, at this dose and schedule, brequinar has only modest activity in patients with advanced breast cancer.

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