Trial reportClinical cancer research : an official journal of the American Association for Cancer Research2026
Durvalumab plus Paclitaxel, with or without Capivasertib or Oleclumab, in Patients with Locally Advanced/Metastatic Triple-Negative Breast Cancer.
Trial report in Clinical cancer research : an official journal of the American Association for Cancer Research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03742102 (A Phase IB/II, 2-stage, Open-label, Multicenter Study to Determine the Efficacy and Safety of Durvalumab), which is not on this map. Not yet cited in PubMed.
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A Phase IB/II, 2-stage, Open-label, Multicenter Study to Determine the Efficacy and Safety of Durvalumab (MEDI4736) + Paclitaxel and Durvalumab (MEDI4736) in Combination With Novel Oncology Therapies With or Without Paclitaxel for First-line Metastatic Triple Negative Breast Cancer
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18 authors.
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Abstract
purposeTriple-negative breast cancer (TNBC) is a heterogeneous disease with high recurrence rates and poor prognosis, often requiring multiple therapies. BEGONIA was a phase Ib/II, multiarm, platform study evaluating the safety and efficacy of first-line treatment combinations with durvalumab (anti-PD-L1 antibody) for locally advanced, unresectable/metastatic TNBC (mTNBC; NCT03742102). In this study, we report results of 3 treatment arms. PATIENTS AND
methodsEligible female participants (≥18 years with untreated, unresectable, locally advanced/mTNBC) received durvalumab plus paclitaxel or were randomized to this treatment in combination with capivasertib (pan-AKT inhibitor) or oleclumab (anti-CD73 antibody). The primary objective was safety and tolerability; secondary endpoints included objective response rate (ORR).
resultsTwenty-three patients received durvalumab plus paclitaxel, 31 received capivasertib combination, and 33 received oleclumab combination. Maximum grade 3/4 adverse events occurred in 10 of 23 (43.5%), 25 of 31 (80.6%), and 8 of 33 (24.2%) patients in the durvalumab plus paclitaxel, capivasertib-combination, and oleclumab-combination arms, respectively. The confirmed ORR (95% confidence interval) was 56.5% (34.5-76.8) with durvalumab plus paclitaxel, 54.8% (36-72.7) with capivasertib combination, and 51.5% (33.5-69.2) with oleclumab combination. Responses were observed across biomarker subgroups, including PD-L1, PIK3CA/AKT1/PTEN alterations, and CD73, with a trend for improved activity in the PD-L1-positive subgroups.
conclusionsThese findings support the clinical activity and tolerability of durvalumab plus paclitaxel in locally advanced unresectable/mTNBC, as expected for an immune checkpoint inhibitor in combination with chemotherapy. The addition of capivasertib or oleclumab to this treatment combination showed no substantial additional benefit. PD-L1 expression was associated with enhanced antitumor activity across all arms.
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