e15544 Background: Platinum resistant-refractory ovarian cancer (PRROC) patients have a poor outcome; single-agent therapy is still the gold standard, with overall response rate lesser than 20% and progression-free-survival is not higher than 4 months. Methods: We tested safety and activity of a two-drugs-regimen containing NPLED and cyclophosphamide in a phase II open label study. From October 2007 to October 2011 thirty-two patients with platinum-resistant/refractory disease were enrolled. Enrolled patients were pretreated with a median number of 2 lines of chemotherapy, ranging from 1 to 5. NPLED and cyclophosphamide were administered at the dose of 60 mg. and 600 mg p.s.m. respectively. Results: Patients received a median number of three cycles of chemotherapy. A total of 145 cycles were administered: as G3 toxicities we registered emesis (6%), diaorrhea (3%), asthenia, and alopecia. No grade 4 adverse events occurred. Among the 30 patients evaluable for response we observed 5 (17%) partial responses and 10 (33%) stable diseases. The median progression-free-survival was 13 weeks and the median survival was 46 weeks. Conclusions: These results are similar to other data reported in literature. In conclusion we may affirm that the association of NPLED and cyclophosphamide is active and safe when administered in PRROC, but it don’t modify the prognosis of this subset of patients.
837P Phase II trial of oncolytic vaccinia virus primed immunochemotherapy in platinum-resistant/refractory ovarian cancer (PRROC) (NCT02759588)