Long-term Follow-up of Patients with Moderate Aplastic Anemia and Pure Red Cell Aplasia Treated with Daclizumab
Overview
Authors
Affiliations
Background: Pure red cell aplasia and moderate aplastic anemia are marrow failure states with an immune pathogenesis. Previously, we described short-term improvements in blood counts in two pilot studies treating moderate aplastic anemia (mAA) and pure red cell aplasia (PRCA) patients with daclizumab, a humanized monoclonal antibody to the interleukin-2 receptor; we now report our long-term experience with a larger cohort of patients.
Design And Methods: After a median follow-up period of 4.8 years, 19 of 45 (42%) evaluable mAA patients and 10 of 26 (38%) patients with PRCA responded by three months and 2 additional mAA patients responded by six months following administration of the drug.
Results: Seven of 28 (25%) mAA patients achieved long-term packed red blood cell PRBC transfusion independence, and all PRCA responders achieved long-term transfusion PRBC transfusion independence.
Conclusions: Red cell transfusion-independence prior to treatment in mAA patients predicted response. The only significant adverse treatment-related events were transient rashes and arthralgias. Daclizumab is safe and effective, and produces lengthy remissions in patients with PRCA and mAA.
Treatment strategy for acquired pure red cell aplasia: a systematic review and meta-analysis.
Lobbes H, Lega J, Le Guenno G, Ruivard M, Mainbourg S Blood Adv. 2023; 7(21):6451-6465.
PMID: 37624775 PMC: 10632686. DOI: 10.1182/bloodadvances.2023010587.
Clinical characteristics and outcomes of 100 adult patients with pure red cell aplasia.
Wu X, Cheng L, Liu X, Sun Y, Li B, He G Ann Hematol. 2022; 101(7):1493-1498.
PMID: 35460389 DOI: 10.1007/s00277-022-04847-2.
Distinctive and common features of moderate aplastic anaemia.
Patel B, Barot S, Kuzmanovic T, Kerr C, Przychodzen B, Thota S Br J Haematol. 2020; 189(5):967-975.
PMID: 32004386 PMC: 8340733. DOI: 10.1111/bjh.16460.
Diagnosis and Treatment of Aplastic Anemia.
Peslak S, Olson T, Babushok D Curr Treat Options Oncol. 2017; 18(12):70.
PMID: 29143887 PMC: 5804354. DOI: 10.1007/s11864-017-0511-z.
Pure Red Cell Aplasia Following Interleukin-2 Therapy.
Dutcher J, Fan W, Wiernik P J Investig Med High Impact Case Rep. 2016; 4(2):2324709616643991.
PMID: 27144182 PMC: 4840614. DOI: 10.1177/2324709616643991.