Phase II trial of nab-paclitaxel in the treatment of recurrent or persistent advanced cervix cancer: A gynecologic oncology group study

Abstract Background Metastatic and recurrent, platinum resistant cervix cancer has an extremely poor prognosis. The Gynecologic Oncology Group has studied >20 cytotoxic drugs or drug combinations in the second-line, phase II setting of advanced, drug resistant cervix cancer. Methods Nanoparticle, albumin-bound paclitaxel (nab-paclitaxel) was administered at 125mg/m 2 IV over 30minutes on days 1, 8 and 15 of each 28daycycle to 37 women with metastatic or recurrent cervix cancer that had progressed or relapsed following first-line cytotoxic drug treatment. A flexible, 2-stage accrual design that allowed stopping early for lack of treatment activity was utilized. Because of slow patient accrual, the second stage was not completed. Results Of 37 patients enrolled, 2 were ineligible due to no prior cytotoxic chemotherapy, which left 35 eligible patients evaluable for response and tolerability. All of the eligible patients had 1 prior chemotherapy regimen and 27 of them had prior radiation therapy with concomitant cisplatin. The median number of nab-paclitaxel cycles were 4 (range 1–15). Ten (28.6%; CI 14.6%–46.3%) of the 35 patients had a partial response and another 15 patients (42.9%) had stable disease. The median progression-free and overall survival were 5.0 and 9.4months, respectively. The only NCI CTCAE grade 4 event was neutropenia in 2 patients (5.7%) which resolved following dose reduction. Grade 3 neurotoxicity was reported in 1 (2.9%) patient and resolved to grade 2 following dose discontinuation. Conclusions Nab-paclitaxel has considerable activity and moderate toxicity in the treatment of drug resistant, metastatic and recurrent cervix cancer.