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Silent Inactivation of Asparaginase in Japan: Results of the Prospective ALL-ASP19 Trial

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Journal Int J Hematol
Specialty Hematology
Date 2024 Sep 30
PMID 39347942
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Abstract

Silent inactivation (SI) of L-asparaginase (ASP) is a phenomenon by which a neutralizing antibody for ASP (AAA) decreases ASP activity (ASA) in patients without a clinical allergy to ASP. Acute lymphoblastic leukemia (ALL) has a poor prognosis in patients with SI. Therefore, measurement of ASA levels, not AAA levels, is needed to identify patients with SI. We herein report the results of the prospective clinical trial ALL-ASP19, the first study in Japan to measure ASA and AAA to identify patients with SI. A total of 110 newly diagnosed ALL patients were enrolled, and ASA levels were measured three times during ALL treatment. Besides the 12 patients who discontinued the study, 32 were excluded due to inappropriate frequency and timing of ASA measurements and inappropriate ASP dosing. The remaining 66 patients were analyzed, and 3 patients with SI (4.5%) were identified. The incidence of SI is lower in Japan than in other countries. AAA was detected in all patients with SI, but four of the seven patients with AAA did not develop SI. Clinical characteristics did not significantly differ between patients with and without SI. Therefore, ASA levels must be measured to identify patients receiving insufficient ASP treatment.

References
1.
Malard F, Mohty M . Acute lymphoblastic leukaemia. Lancet. 2020; 395(10230):1146-1162. DOI: 10.1016/S0140-6736(19)33018-1. View

2.
van der Sluis I, Vrooman L, Pieters R, Baruchel A, Escherich G, Goulden N . Consensus expert recommendations for identification and management of asparaginase hypersensitivity and silent inactivation. Haematologica. 2016; 101(3):279-85. PMC: 4815719. DOI: 10.3324/haematol.2015.137380. View

3.
Vrooman L, Stevenson K, Supko J, OBrien J, Dahlberg S, Asselin B . Postinduction dexamethasone and individualized dosing of Escherichia Coli L-asparaginase each improve outcome of children and adolescents with newly diagnosed acute lymphoblastic leukemia: results from a randomized study--Dana-Farber Cancer.... J Clin Oncol. 2013; 31(9):1202-10. PMC: 3595424. DOI: 10.1200/JCO.2012.43.2070. View

4.
Koh K, Kato M, Saito A, Kada A, Kawasaki H, Okamoto Y . Phase II/III study in children and adolescents with newly diagnosed B-cell precursor acute lymphoblastic leukemia: protocol for a nationwide multicenter trial in Japan. Jpn J Clin Oncol. 2018; 48(7):684-691. PMC: 6022563. DOI: 10.1093/jjco/hyy071. View

5.
Sato A, Hatta Y, Imai C, Oshima K, Okamoto Y, Deguchi T . Nelarabine, intensive L-asparaginase, and protracted intrathecal therapy for newly diagnosed T-cell acute lymphoblastic leukaemia in children and young adults (ALL-T11): a nationwide, multicenter, phase 2 trial including randomisation in the very.... Lancet Haematol. 2023; 10(6):e419-e432. DOI: 10.1016/S2352-3026(23)00072-8. View