Abstract CT113: A phase III, multicenter, randomized study evaluating the efficacy and safety and efficacy of erythrocyte encapsulated l-asparaginase (Ery001) versus native l-asparaginase (L-asp) in combination with COOPRALL regimen in patients with first relapse of acut

Asparaginases are a cornerstone in the treatment of ALL, but their utility is limited by toxicities including hypersensitivity. ERY001 improves pharmacokinetics and tolerability, while maintaining circulating asparaginase (ASPA) activity due to the protective barrier of the erythrocyte membrane. This phase III study enrolled pts with primary relapsed/refractory Ph- ALL. The co-primary endpoints were the duration of ASPA activity equal or greater than 100IU/L and the incidence of ASPA hypersensitivity during induction. Patients, aged 1-55 years, without prior ASPA hypersensitivity were randomized to ERY001 (150 IU/kg) or L-ASP(10.000IU/m2) in combination with COOPRALL. The patients with prior ASPA hypersensitivity received ERY001. ERY001 significantly reduced the incidence of ASPA hypersensitivity (0% vs 43%; p100IU/l significantly longer than L-ASP (20.5±5.2 vs 9.2±7.5 days; p These highly encouraging results show that ERY001 is a suitable option for patients with relapsed ALL maintaining ASPA efficacy with improved tolerability. Citation Format: Yves Bertrand, Andre Baruchel, Xavier Thomas, Nicolas Blin, Emmanuelle Tavernier, Yves Perel, Norbert Vey, Virginie Gandemer, Iman ElHariry, Yann Godfrin. A phase III, multicenter, randomized study evaluating the efficacy and safety and efficacy of erythrocyte encapsulated l-asparaginase (Ery001) versus native l-asparaginase (L-asp) in combination with COOPRALL regimen in patients with first relapse of acut [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr CT113. doi:10.1158/1538-7445.AM2015-CT113