Bella Kaufman1, Ronnie Shapira-Frommer1, Rita K Schmutzler1, M William Audeh1, Michael Friedlander1, Judith Balmaña1, Gillian Mitchell1, Georgeta Fried1, Salomon M Stemmer1, Ayala Hubert1, Ora Rosengarten1, Mariana Steiner1, Niklas Loman1, Karin Bowen1, Anitra Fielding1, Susan M Domchek2. 1. Bella Kaufman and Ronnie Shapira-Frommer, Sheba Medical Center, Tel Hashomer; Georgeta Fried, Institute of Oncology, Rambam Health Care Campus; Mariana Steiner, Linn Medical Centre, Haifa; Salomon M. Stemmer, Rabin Medical Center, Petah Tikva; Ayala Hubert, Hadassah-Hebrew University Hospital, Sharett Institute of Oncology; Ora Rosengarten, Shaare Zedek Medical Centre, Jerusalem, Israel; Rita K. Schmutzler, Center for Familial Breast and Ovarian Cancer and Center of Integrated Oncology, Cologne, Germany; M. William Audeh, Samuel Oschin Cancer Institute, Los Angeles, CA; Michael Friedlander, Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales; Gillian Mitchell, Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Victoria, Australia; Judith Balmaña, Vall d'Hebron Institute of Oncology, Barcelona, Spain; Niklas Loman, Skånes Universitetssjuk Lund, Lund, Sweden; Karin Bowen and Anitra Fielding, AstraZeneca, Macclesfield, United Kingdom; and Susan M. Domchek, Basser Research Center and Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA. 2. Bella Kaufman and Ronnie Shapira-Frommer, Sheba Medical Center, Tel Hashomer; Georgeta Fried, Institute of Oncology, Rambam Health Care Campus; Mariana Steiner, Linn Medical Centre, Haifa; Salomon M. Stemmer, Rabin Medical Center, Petah Tikva; Ayala Hubert, Hadassah-Hebrew University Hospital, Sharett Institute of Oncology; Ora Rosengarten, Shaare Zedek Medical Centre, Jerusalem, Israel; Rita K. Schmutzler, Center for Familial Breast and Ovarian Cancer and Center of Integrated Oncology, Cologne, Germany; M. William Audeh, Samuel Oschin Cancer Institute, Los Angeles, CA; Michael Friedlander, Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales; Gillian Mitchell, Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Victoria, Australia; Judith Balmaña, Vall d'Hebron Institute of Oncology, Barcelona, Spain; Niklas Loman, Skånes Universitetssjuk Lund, Lund, Sweden; Karin Bowen and Anitra Fielding, AstraZeneca, Macclesfield, United Kingdom; and Susan M. Domchek, Basser Research Center and Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA. susan.domchek@uphs.upenn.edu.
Abstract
PURPOSE: Olaparib is an oral poly (ADP-ribose) polymerase inhibitor with activity in germline BRCA1 and BRCA2 (BRCA1/2) -associated breast and ovarian cancers. We evaluated the efficacy and safety of olaparib in a spectrum of BRCA1/2-associated cancers. PATIENTS AND METHODS: This multicenter phase II study enrolled individuals with a germline BRCA1/2 mutation and recurrent cancer. Eligibility included ovarian cancer resistant to prior platinum; breast cancer with ≥ three chemotherapy regimens for metastatic disease; pancreatic cancer with prior gemcitabine treatment; or prostate cancer with progression on hormonal and one systemic therapy. Olaparib was administered at 400 mg twice per day. The primary efficacy end point was tumor response rate. RESULTS: A total of 298 patients received treatment and were evaluable. The tumor response rate was 26.2% (78 of 298; 95% CI, 21.3 to 31.6) overall and 31.1% (60 of 193; 95% CI, 24.6 to 38.1), 12.9% (eight of 62; 95% CI, 5.7 to 23.9), 21.7% (five of 23; 95% CI, 7.5 to 43.7), and 50.0% (four of eight; 95% CI, 15.7 to 84.3) in ovarian, breast, pancreatic, and prostate cancers, respectively. Stable disease ≥ 8 weeks was observed in 42% of patients (95% CI, 36.0 to 47.4), including 40% (95% CI, 33.4 to 47.7), 47% (95% CI, 34.0 to 59.9), 35% (95% CI, 16.4 to 57.3), and 25% (95% CI, 3.2 to 65.1) of those with ovarian, breast, pancreatic, or prostate cancer, respectively. The most common adverse events (AEs) were fatigue, nausea, and vomiting. Grade ≥ 3 AEs were reported for 54% of patients; anemia was the most common (17%). CONCLUSION: Responses to olaparib were observed across different tumor types associated with germline BRCA1/2 mutations. Olaparib warrants further investigation in confirmatory studies.
PURPOSE:Olaparib is an oral poly (ADP-ribose) polymerase inhibitor with activity in germline BRCA1 and BRCA2 (BRCA1/2) -associated breast and ovarian cancers. We evaluated the efficacy and safety of olaparib in a spectrum of BRCA1/2-associated cancers. PATIENTS AND METHODS: This multicenter phase II study enrolled individuals with a germline BRCA1/2 mutation and recurrent cancer. Eligibility included ovarian cancer resistant to prior platinum; breast cancer with ≥ three chemotherapy regimens for metastatic disease; pancreatic cancer with prior gemcitabine treatment; or prostate cancer with progression on hormonal and one systemic therapy. Olaparib was administered at 400 mg twice per day. The primary efficacy end point was tumor response rate. RESULTS: A total of 298 patients received treatment and were evaluable. The tumor response rate was 26.2% (78 of 298; 95% CI, 21.3 to 31.6) overall and 31.1% (60 of 193; 95% CI, 24.6 to 38.1), 12.9% (eight of 62; 95% CI, 5.7 to 23.9), 21.7% (five of 23; 95% CI, 7.5 to 43.7), and 50.0% (four of eight; 95% CI, 15.7 to 84.3) in ovarian, breast, pancreatic, and prostate cancers, respectively. Stable disease ≥ 8 weeks was observed in 42% of patients (95% CI, 36.0 to 47.4), including 40% (95% CI, 33.4 to 47.7), 47% (95% CI, 34.0 to 59.9), 35% (95% CI, 16.4 to 57.3), and 25% (95% CI, 3.2 to 65.1) of those with ovarian, breast, pancreatic, or prostate cancer, respectively. The most common adverse events (AEs) were fatigue, nausea, and vomiting. Grade ≥ 3 AEs were reported for 54% of patients; anemia was the most common (17%). CONCLUSION: Responses to olaparib were observed across different tumor types associated with germline BRCA1/2 mutations. Olaparib warrants further investigation in confirmatory studies.
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