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Medline ® Abstract for Reference 35

of 'Medical treatment for relapsed epithelial ovarian, fallopian tubal, or peritoneal cancer: Platinum-resistant disease'

Olaparib monotherapy in patients with advanced relapsed ovarian cancer and a germline BRCA1/2 mutation: a multistudy analysis of response rates and safety.
Matulonis UA, Penson RT, Domchek SM, Kaufman B, Shapira-Frommer R, Audeh MW, Kaye S, Molife LR, Gelmon KA, Robertson JD, Mann H, Ho TW, Coleman RL
Ann Oncol. 2016;27(6):1013. Epub 2016 Mar 8.
BACKGROUND: The PARP inhibitor olaparib (Lynparza™) demonstrates antitumor activity in women with relapsed ovarian cancer and a germline BRCA1/2 mutation (gBRCAm). Data from olaparib monotherapy trials were used to explore the treatment effect of olaparib in patients with gBRCAm ovarian cancer who had received multiple lines of prior chemotherapy.
PATIENTS AND METHODS: This analysis evaluated pooled data from two phase I trials [NCT00516373 (study 2); NCT00777582 (study 24)]and four phase II trials [NCT00494442 (study 9); NCT00628251 (study 12); NCT00679783 (study 20); NCT01078662 (study 42)]that recruited women with relapsed ovarian, fallopian tube or peritoneal cancer. All patients had a documented gBRCAm and were receiving olaparib 400 mg monotherapy twice daily (capsule formulation) at the time of relapse. Objective response rate (ORR) and duration of response (DoR) were evaluated using original patient outcomes data for patients with measurable disease at baseline.
RESULTS: Of the 300 patients in the pooled population, 273 had measurable disease at baseline, of whom 205 (75%) had received≥3 lines of prior chemotherapy. In the pooled population, the ORR was 36% [95% confidence interval (CI) 30-42]and the median DoR was 7.4 months (95% CI 5.7-9.1). The ORR among patients who had received≥3 lines of prior chemotherapy was 31% (95% CI 25-38), with a DoR of 7.8 months (95% CI 5.6-9.5). The safety profile of olaparib was similar in patients who had received≥3 lines of prior chemotherapy compared with the pooled population; grade≥3 adverse events were reported in 54% and 50% of patients, respectively.
CONCLUSION: Durable responses to olaparib were observed in patients with relapsed gBRCAm ovarian cancer who had received≥3 lines of prior chemotherapy.
CLINICALTRIALSGOV: NCT00516373; NCT00494442; NCT00628251; NCT00679783; NCT00777582; NCT01078662.
Department of Medical Oncology, Dana-Farber Cancer Institute, Boston ursula_matulonis@dfci.harvard.edu.