结合
卵巢癌
药品
铂金
癌症
抗体-药物偶联物
医学
相(物质)
癌症研究
抗体
肿瘤科
内科学
药理学
生物
化学
免疫学
单克隆抗体
数学
数学分析
催化作用
有机化学
生物化学
作者
Nicole Concin,John L. Hays,Alejandro Pérez Fidalgo,Bhavana Pothuri,Susana Banerjee,Sharad Ghamande,Isabelle Ray‐Coquard,Anna Germanová,B.J. Rimel,Domenica Lorusso,Noelle Cloven,Jean‐François Baurain,Leslie M. Randall,Birutė Brasiūnienė,Jill Tseng,Dagmara Klasa-Mazurkiewicz,Theresa L. Werner,Ana Oaknin,Joo Ern Ang,Alexandra Leary,Erin Bishop,Christian Marth,Chelsea Bradshaw,Robert A. Burger,Antonio González-Martín,Debra L. Richardson
标识
DOI:10.1136/ijgc-2024-esgo.1118
摘要
Introduction/Background
Effective and well-tolerated treatments for PROC remain an unmet medical need; standard of care single agent chemotherapy has limited efficacy, with response rates at ~12%. Upifitamab rilsodotin (UpRi) is a Dolaflexin, high Drug-to-Antibody Ratio ADC targeting NaPi2b, a sodium-dependent phosphate transporter broadly expressed in high-grade serous epithelial ovarian cancer, with limited expression in normal tissues. UPLIFT was a single-arm Ph2 trial evaluating the efficacy and safety of UpRi in PROC. Methodology
UPLIFT enrolled patients with up to 4 prior lines of therapy; patients were dosed at 36mg/m2 Q4W. Patients enrolled regardless of NaPi2b expression; baseline tumor samples were collected to determine NaPi2b expression retrospectively. Primary endpoint was confirmed ORR in the NaPi2b-positive population. Secondary endpoints included ORR in the overall population, duration of response (DOR), and safety. Results
268 patients were enrolled, 141 (53%) were determined to be NaPi2b-positive [TPS≥75]. The median prior lines of therapy among all patients was three; 31% received four prior lines of systemic treatment, 53% received at least one prior treatment for PROC. Additionally, 84% of patients received prior bevacizumab, 69% received prior PARPi. Based on data cut (May 31, 2023) investigator assessed confirmed ORR in the NaPi2b-positive population was 15.6% (95% CI, 10, 22.7); median DOR 7.4 months (95% CI, 4.2, NR). In the overall patient population, ORR was 13.1% (95% CI, 9.3, 17.7), DOR 7.4 months (95% CI, 3.6, 10.4). Dose reductions and discontinuations due to TRAE were 25% and 18.7%, respectively. The most frequently reported TRAEs were AST increase (69%), nausea (51.9%), thrombocytopenia/platelet count decrease (49.6%), fatigue (44%), anemia (39.2%) and pyrexia (37.7%). ILD/pneumonitis reported in 9.7% (Gr3 0.7%). Serious treatment emergent bleeding events were observed, including five G5 events. Conclusion
In this single-arm open label trial, ORR in the NaPi2b-positive and overall population did not show meaningful improvement compared to historical single-agent chemotherapy, though durable responses were observed. Disclosures
This trial was sponsored by Mersana Therapeutics, Inc.