RT Journal Article T1 A phase Ib study of GSK3052230, an FGF ligand trap in combination with pemetrexed and cisplatin in patients with malignant pleural mesothelioma. A1 van Brummelen, Emilie M J A1 Levchenko, Evgeny A1 Dómine, Manuel A1 Fennell, Dean A A1 Kindler, Hedy L A1 Viteri, Santiago A1 Gadgeel, Shirish A1 López, Pilar Garrido A1 Kostorov, Vladimir A1 Morgensztern, Daniel A1 Orlov, Sergey A1 Zauderer, Marjorie G A1 Vansteenkiste, Johan F A1 Baker-Neblett, Katherine A1 Vasquez, James A1 Wang, Xiaowei A1 Bellovin, David I A1 Schellens, Jan H M A1 Yan, Li A1 Mitrica, Ionel A1 DeYoung, M Phillip A1 Trigo, Jose K1 Combination therapy K1 FGF K1 Ligand trap K1 Mesothelioma K1 Phase 1 AB Background Fibroblast growth factors (FGFs) have a fundamental role in cancer. Sequestering FGFs with GSK3052230 (FP-1039) blocks their ability to activate FGFRs while avoiding toxicities associated with small molecule inhibitors of FGFR, including hyperphosphatemia and retinal, nail, and skin toxicities. Methods A multicenter, open-label, phase Ib study evaluated weekly GSK3052230 added to pemetrexed/cisplatin in patients with treatment-naive, unresectable malignant pleural mesothelioma. Doses were escalated according to a 3 + 3 design, followed by cohort expansion at the maximum tolerated dose (MTD). Endpoints included safety, overall response rate, progression-free survival, and pharmacokinetics. Results 36 patients were dosed at 10, 15, and 20 mg/kg doses of GSK3052230. Three dose-limiting toxicities were observed at 20 mg/kg and one at 15 mg/kg. The MTD was defined as 15 mg/kg and used for cohort expansion. The most common treatment-related adverse events (AEs) were nausea (56%), decreased appetite (36%), infusion reactions (36%), decreased neutrophil counts (36%), and fatigue (33%). The confirmed ORR was 39% (95% CI: 23.1-56.5) (14/36 PRs) and 47% had stable disease (17/36), giving a disease control rate of 86%. At 15 mg/kg GSK3052230 (n = 25), the ORR was 44% (95% CI: 24.4-65.1), and the median PFS was 7.4 months (95% CI: 6.7-13.4). Four patients had disease control for over 1 year, and three were still ongoing. Conclusion At 15 mg/kg weekly, GSK3052230 was well tolerated in combination with pemetrexed/cisplatin and durable responses were observed. Importantly, AEs associated with small molecule inhibitors of FGFR were not observed, as predicted by the unique mechanism of action of this drug. PB Springer Nature YR 2019 FD 2019-05-07 LK http://hdl.handle.net/10668/13925 UL http://hdl.handle.net/10668/13925 LA en NO van Brummelen EMJ, Levchenko E, Dómine M, Fennell DA, Kindler HL, Viteri S, et al. A phase Ib study of GSK3052230, an FGF ligand trap in combination with pemetrexed and cisplatin in patients with malignant pleural mesothelioma. Invest New Drugs. 2020 Apr;38(2):457-467 DS RISalud RD Apr 7, 2025