4.3 Article

A phase II study to evaluate the efficacy of low-dose rasburicase (1.5mg) in adolescent and adult acute leukemia and high-grade lymphomas with tumor lysis syndrome

Journal

LEUKEMIA & LYMPHOMA
Volume 64, Issue 3, Pages 628-638

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/10428194.2023.2167491

Keywords

Low-dose Rasburicase; Tumor lysis syndrome; Leukemia; Lymphoma; Dose optimisation

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The objective of this study was to investigate the plasma uric acid response rate. The use of low-dose rasburicase led to rapid and sustained reductions in uric acid levels in approximately 52% of patients.
The FDA recommended dose of rasburicase 0.2 mg/kg/day till the resolution of TLS or up to 5 days, might be in excess and is prohibitively expensive. The quality of evidence supporting low dose rasburicase is limited. The objective is to study the plasma uric acid response rate. This is a single center, non-randomised phase II study. Duration is 10 June 2017 till 30 July 2019. Study setting is at Adult Hematolymphoid Unit, Tata Memorial Center. Participants are patients with acute leukemia and high-grade lymphomas aged >/=18 years, with ECOG PS of 0-3, with either laboratory or clinical TLS. Rasburicase was administered at fixed-dose of 1.5 mg. The subsequent doses (1.5 mg each dose) were administered only if plasma UA levels did not decline by >50% on day 2, at the physician's discretion. We demonstrate that a low-dose rasburicase strategy leads to rapid and sustained reductions of uric acid in about 52% patients.

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