A Pilot Study of Recombinant Human Arginase 1 (rhArg1) in Patients With Relapsed or Refractory Leukemia or Lymphoma

Patients will receive weekly IV infusions of PEG-BCT-100, until evidence of disease progression, intolerable adverse events, or withdrawal of patient consent. For safety sake, each subject will receive an induction dose of PEG-BCT-100 500 U/kg and 1000 U/kg at week -2 and week -1, respectively. The study dose of PEG-BCT-100 1600 U/kg will be initiated at week 1 (Day1). Each escalation of dose level will be determined by the investigator according to each subject's tolerability and criteria for treatment discontinuation.