JOURNAL ARTICLE
MULTICENTER STUDY

A Phase II, open-label study evaluating pazopanib in patients with recurrent ovarian cancer

Michael Friedlander, Kenneth C Hancock, Danny Rischin, Mark J Messing, Claude A Stringer, Gemma M Matthys, Bo Ma, Jeffrey P Hodge, Joanne J Lager
Gynecologic Oncology 2010, 119 (1): 32-7
20584542

OBJECTIVE: The progression-free and median survival of patients with advanced ovarian cancer has not appreciably improved over the last decade. Novel targeted therapies, particularly antiangiogenic agents, may potentially improve clinical outcomes in patients with ovarian cancer. This phase II, open-label study evaluated oral pazopanib monotherapy in patients with low-volume recurrent ovarian cancer.

METHODS: Patients with recurrent epithelial ovarian, fallopian tube, or primary peritoneal carcinoma with complete CA-125 response to initial platinum-based chemotherapy and subsequent elevation of CA-125 to ≥ 42 U/mL (> 2 × ULN) were treated with pazopanib 800 mg once daily until PD or unacceptable toxicity. This Green-Dahlberg study required 2 CA-125 responses in stage I (20 patients) to proceed to stage II (15 patients). The primary endpoint was CA-125 response (≥ 50% decrease from baseline, confirmed ≥ 21 days after initial evaluation).

RESULTS: Eleven of 36 patients (31%) had a CA-125 response to pazopanib, with median time to response of 29 days and median response duration of 113 days. Overall response rate was 18% in patients with measurable disease at baseline. The most common adverse events leading to discontinuation of study drug were grade 3 ALT (8%) and AST (8%) elevation. Only 1 grade 4 toxicity (peripheral edema) was reported.

CONCLUSIONS: Pazopanib monotherapy was relatively well tolerated, with toxicity similar to other small-molecule, oral angiogenesis inhibitors, and demonstrated promising single-agent activity in patients with recurrent ovarian cancer. Further studies evaluating the potential role of pazopanib in patients with ovarian cancer are ongoing.

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