Comparison of Efficacy and Safety of Two Types of E.coliAsparaginase (Native or Pegylated) for Treatment of Adult Patients with High-Risk (HR), Philadelphia (Ph) Chromosome-Negative ALL Included in the Prospective MRD-Oriented Protocol ALL-HR-11 from the Spanish Pethema Group

Background and objective. Asparaginase (ASP) is an essential drug for ALL treatment. Two types of E.coliASP (native and pegylated) are used in clinical trials for treatment of children and adults with ALL, but to our knowledge direct comparison between these two types of ASP in the same protocol has not been performed. This study aimed to compare the efficacy and safety of native vs. PEG-ASP in adult patients with HR, Ph-negative ALL.