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Universal pooled plasma (Uniplas(®)) does not induce complement-mediated hemolysis of human red blood cells in vitro

Universal pooled plasma (Uniplas(®)) does not induce complement-mediated hemolysis of human red blood cells in vitro

Transfusion and Apheresis Science: Official Journal of the World Apheresis Association: Official Journal of the European Society for Haemapheresis 52(1): 128-135

ISSN/ISBN: 1473-0502

PMID: 23706313

DOI: 10.1016/j.transci.2013.04.039

Pooling of plasma of different blood groups before large scale manufacturing of Uniplas(®) results in the formation of low levels of soluble immune complexes (CIC). The aim of this study was to investigate the level and removal of CIC during Uniplas(®) manufacturing. In addition, an in vitro hemolysis assay should be developed and investigate if Uniplas(®) does induce complement-mediated hemolysis of human red blood cells (RBC). In-process samples from Uniplas(®) (universal plasma) and Octaplas(LG)(®) (blood group specific plasma) routine manufacturing batches were tested on CIC using commercially available ELISA test kits. In addition, CIC was produced by admixing heat-aggregated immunoglobulins or monoclonal anti-A/anti-B antibodies to plasma and removal of CIC was followed in studies of the Uniplas(®) manufacturing process under down-scale conditions. The extent of RBC lysis was investigated in plasma samples using the in-house hemolysis assay. Levels of CIC in Uniplas(®) are within the normal ranges for plasma and comparable to that found in Octaplas(LG)(®). Down-scale experiments showed that both IgG/IgM-CIC levels are significantly removed on average by 40-50% during Uniplas(®) manufacturing. Uniplas(®) does not induce hemolysis of RBCs in vitro. Hemolysis occurs only after spiking with high titers of anti-A/anti-B antibodies and depends on the antibody specificity (i.e. titer) in the plasma sample. The results of this study confirm the safety of Uniplas(®) regarding transfusion to patients of all ABO blood groups.

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Accession: 036905427

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