Safety and efficacy of salvage nano-particle albumin bound paclitaxel in recurrent cervical cancer: a feasibility study.

Background: After platinum and taxane chemotherapy, with or without bevacizumab, active regimens for advanced or recurrent cervical cancer are lacking. Our objective was to review a single institution experience in treating recurrent, refractory cervical cancer with nano-particle albumin bound (NAB) paclitaxel with or without bevacizumab.

Methods: This retrospective case series was conducted in accordance with the regulations set forth by the Institutional Review Board at St. Joseph's Hospital and Medical center. The chemotherapy log at the outpatient infusion center at the University of Arizona Cancer Center was reviewed to identify all advanced cervical cancer patients treated with NAB-paclitaxel from November 2011 until February 2015. The following data points were extracted from patient charts: demographic information, number of cycles, progression free survival (PFS), overall survival (OS), dose reductions and dose-limiting toxicities. In addition the average number of treatment cycles and age at recurrence were calculated.

Results: A total of 12 subjects were identified as receiving treatment with NAB-paclitaxel. Mean age at time of recurrence was 47.2 years (36-55). Nine subjects had squamous cell histology and three subjects had adenocarcinoma histology. All subjects had failed treatment with platinum and taxane, or platinum and topotecan chemotherapy. Two subjects were lost to follow up. The Median number of cycles of NAB-paclitaxel was 6.5 (2-19). The total number of cycles of NAB-paclitaxel in the study population was 65. Seven subjects were treated in combination with bevacizumab. Of these, three subjects are still alive and one subject is currently receiving active treatment with NAB-paclitaxel. The median PFS and OS for all subjects that met mortality endpoint was 4.8 months and 8.9 months (n = 7), respectively. One subject discontinued NAB-paclitaxel secondary to peripheral neuropathy, and one subject developed a vesicovaginal fistula while obtaining combination NAB-paclitaxel and bevacizumab therapy.

Conclusions: NAB-paclitaxel with or without bevacizumab is tolerable and potentially active in treating recurrent cervical cancer after failing platinum-taxane or topotecan chemotherapy. This small case series deserves confirmation through prospective clinical trials.