Olaparib With or Without Durvalumab for DDR Gene Mutated Biliary Tract Cancer Following Platinum-based Chemotherapy

Summary

First-line gemcitabine plus cisplatin chemotherapy is the standard first-line treatment for unresectable or metastatic advanced biliary tract cancer and the optimal duration of the treatment is not mentioned in current clinical guidelines. In the pivotal phase 3 ABC-02 trial, patients received up to 6 to 8 cycles of treatment and stopped without maintenance and our retrospective study shows no significant benefit of continuing gemcitabine plus cisplatin beyond 6 to 8 cycles. However, the survival outcomes of patients who completed 6 to 8 cycles of gemcitabine plus cisplatin without progression are dismal with progression-free survival from the last dose of the treatment of median 5.2 months in a prior retrospective study. Indeed, there is an unmet clinical need in terms of maintenance therapy for advanced biliary tract cancer without progression to first-line gemcitabine plus cisplatin chemotherapy. Durvalumab with/without tremelimumab, anti-CTLA4 inhibitor, showed encouraging results in recently presented study for treatment of advanced biliary tract cancer combination with gemcitabine plus cisplatin. Combination of olaparib and durvalumab showed promising results for metastatic HER-2 negative BRCA mutated breast cancer. For DDR gene mutated advanced biliary tract cancer, olaparib plus durvalumab combination may show synergistic effect with better efficacy than olaparib monotherapy. Both olaparib and durvalumab are relatively well tolerated compared to other cytotoxic chemotherapeutic agents. Olaparib may have some degree of myelosuppression, most patients are expected to well tolerate. Although combination of durvalumab and olaparib may cause additional adverse events, these also might be tolerable, considering that there are no overlapping toxicities between durvalumab and olaparib and the safety data for the combination of durvalumab with olaparib. Considering poor prognosis in patients with advanced biliary tract cancer and lack of maintenance treatment following scheduled first-line GemCis, clinical benefits with maintenance olaparib or olaparib plus durvalumab weigh more than the potential risks.

Timeline

Start

2022-04-01

Primary completion

2025-12-30

Completion

2026-12-30

Publications

• Background Chae H, Kim D, Yoo C, Kim KP, Jeong JH, Chang HM, Lee SS, Park DH, Song TJ, Hwang S, Kim KH, Song GW, Ahn CS, Lee JH, Hwang DW, Kim SC, Jang SJ, Hong SM, Kim TW, Ryoo BY. Therapeutic relevance of targeted sequencing in management of patients with advanced biliary tract cancer: DNA damage repair gene mutations as a predictive biomarker. Eur J Cancer. 2019 Oct;120:31-39. doi: 10.1016/j.ejca.2019.07.022. Epub 2019 Aug 30.
• Background Domchek SM, Postel-Vinay S, Im SA, Park YH, Delord JP, Italiano A, Alexandre J, You B, Bastian S, Krebs MG, Wang D, Waqar SN, Lanasa M, Rhee J, Gao H, Rocher-Ros V, Jones EV, Gulati S, Coenen-Stass A, Kozarewa I, Lai Z, Angell HK, Opincar L, Herbolsheimer P, Kaufman B. Olaparib and durvalumab in patients with germline BRCA-mutated metastatic breast cancer (MEDIOLA): an open-label, multicentre, phase 1/2, basket study. Lancet Oncol. 2020 Sep;21(9):1155-1164. doi: 10.1016/S1470-2045(20)30324-7. Epub 2020 Aug 6.
• Background Golan T, Hammel P, Reni M, Van Cutsem E, Macarulla T, Hall MJ, Park JO, Hochhauser D, Arnold D, Oh DY, Reinacher-Schick A, Tortora G, Algul H, O'Reilly EM, McGuinness D, Cui KY, Schlienger K, Locker GY, Kindler HL. Maintenance Olaparib for Germline BRCA-Mutated Metastatic Pancreatic Cancer. N Engl J Med. 2019 Jul 25;381(4):317-327. doi: 10.1056/NEJMoa1903387. Epub 2019 Jun 2.
• Background Hyung J, Kim B, Yoo C, Kim KP, Jeong JH, Chang HM, Ryoo BY. Clinical Benefit of Maintenance Therapy for Advanced Biliary Tract Cancer Patients Showing No Progression after First-Line Gemcitabine Plus Cisplatin. Cancer Res Treat. 2019 Jul;51(3):901-909. doi: 10.4143/crt.2018.326. Epub 2018 Oct 4.
• Background Jiao S, Xia W, Yamaguchi H, Wei Y, Chen MK, Hsu JM, Hsu JL, Yu WH, Du Y, Lee HH, Li CW, Chou CK, Lim SO, Chang SS, Litton J, Arun B, Hortobagyi GN, Hung MC. PARP Inhibitor Upregulates PD-L1 Expression and Enhances Cancer-Associated Immunosuppression. Clin Cancer Res. 2017 Jul 15;23(14):3711-3720. doi: 10.1158/1078-0432.CCR-16-3215. Epub 2017 Feb 6.
• Background Kang J, Jeong JH, Hwang HS, Lee SS, Park DH, Oh DW, Song TJ, Kim KH, Hwang S, Hwang DW, Kim SC, Park JH, Hong SM, Kim KP, Ryoo BY, Yoo C. Efficacy and Safety of Pembrolizumab in Patients with Refractory Advanced Biliary Tract Cancer: Tumor Proportion Score as a Potential Biomarker for Response. Cancer Res Treat. 2020 Apr;52(2):594-603. doi: 10.4143/crt.2019.493. Epub 2019 Dec 18.
• Background Teo MY, Seier K, Ostrovnaya I, Regazzi AM, Kania BE, Moran MM, Cipolla CK, Bluth MJ, Chaim J, Al-Ahmadie H, Snyder A, Carlo MI, Solit DB, Berger MF, Funt S, Wolchok JD, Iyer G, Bajorin DF, Callahan MK, Rosenberg JE. Alterations in DNA Damage Response and Repair Genes as Potential Marker of Clinical Benefit From PD-1/PD-L1 Blockade in Advanced Urothelial Cancers. J Clin Oncol. 2018 Jun 10;36(17):1685-1694. doi: 10.1200/JCO.2017.75.7740. Epub 2018 Feb 28.
• Background Valle J, Wasan H, Palmer DH, Cunningham D, Anthoney A, Maraveyas A, Madhusudan S, Iveson T, Hughes S, Pereira SP, Roughton M, Bridgewater J; ABC-02 Trial Investigators. Cisplatin plus gemcitabine versus gemcitabine for biliary tract cancer. N Engl J Med. 2010 Apr 8;362(14):1273-81. doi: 10.1056/NEJMoa0908721.

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