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 Blood, 1 February 2004, Vol. 103, No. 3, pp. 1137-1139.
Prepublished online as a Blood First Edition Paper on October 2, 2003; DOI 10.1182/blood-2003-03-0762.

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TRANSFUSION MEDICINE
Brief report

Assessment of removal of human cytomegalovirus from blood components by leukocyte depletion filters using real-time quantitative PCR

Micaela Rios Visconti, Joanne Pennington, Stephen F. Garner, Jean-Pierre Allain, and Lorna M. Williamson

From the Division of Transfusion Medicine, University of Cambridge/National Blood Service, Cambridge, United Kingdom.

To assess removal of cytomegalovirus (CMV) by leukocyte depletion (LD) filters, we developed a spiking model of latent virus using peripheral blood mononuclear cells (PBMCs) infected by coculture with CMV-infected human fibroblasts. Infected PBMCs were purified by dual magnetic column selection and then spiked into whole blood units or buffy coat pools prior to LD by filtration. CMV load and fibroblast contamination were assessed using quantitative CMV DNA real-time PCR and quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) of mRNA encoding the fibroblast-specific splice variant of prolyl-4-hydroxylase, respectively. After correcting for fibroblast-associated CMV, the mean CMV load was reduced in whole blood by LD from 7.42 x 102 to 1.13 copies per microliter (2.8110log reduction) and from 3.8 x 102 to 4.77 copies per microliter (1.910log reduction) in platelets. These results suggest that LD by filtration reduces viral burden but does not completely remove CMV from blood components. (Blood. 2004;103:1137-1139)


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