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Rituximab, plasma exchange and intravenous immunoglobulins as a new treatment strategy for severe HLA alloimmune platelet refractoriness

2014; Informa; Volume: 26; Issue: 2 Linguagem: Inglês

10.3109/09537104.2014.895922

1369-1635

Joan Cid, Laura Magnano, Maria Acosta, Cristina Alba, Jordi Esteve, Miquel Lozano,

Blood transfusion and management

Platelet refractoriness (PR) due to HLA alloimmunization is a common and serious complication of patients receiving long-term packed red blood cell and platelet transfusions. Although most alloimmunized patients will respond to HLA-matched platelets, 20–50% of patients will remain refractory even to matched platelets. Several measures have been reported to overcome this complication, such as intravenous immunoglobulins (IVIG), plasma exchange (PE), protein A column therapy, or rituximab. We report a woman with acute myeloid leukemia secondary to myelodysplastic syndrome who was diagnosed with PR because of HLA alloimmunization. Due to difficulties in finding HLA-compatible platelet donors by cross-reactive groups in our panel of HLA-typed platelet donors, the patient received treatment with rituximab, PEs and IVIG. With this treatment strategy, the presence of HLA antibodies decreased from a panel-reactive antibody (PRA) of 89–0%. This allowed the performance of hematopoietic progenitor cell transplantation with random donor platelets. Rituximab, PE, and IVIG may be an option to overcome severe PR due to poly-specific HLA alloimmunization.