Prevention of transfusion-associated graft-versus-host disease by inactivation of T cells in platelet components.
Patients with hematological malignancies and infants with congenital immunodeficiencies who received blood are two of many populations at risk for transfusion-associated graft-versus-host disease (TA-GVHD). Of the methodologies (eg, photoinactivation, peglyation, ultraviolet light, and irradiation) that can be used to prevent TA-GVHD, only irradiation of whole blood and cellular components is currently accepted practice of the US Food and Drug Administration (FDA). Among the newer methods that have been developed to reduce the risks of bacterial and viral contaminants of platelet transfusions, photochemical treatment (PCT) using psoralens and long-wavelength ultraviolet (UVA) irradiation modifies bacterial and viral genomes sufficiently to inhibit replication. Among a broad group of compounds, the synthetic psoralen compound amotosalen hydrochloride (HCl) (S-59) has been shown to be particularly effective in inactivating bacteria and viruses, without adversely affecting in vitro and in vivo platelet function.
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Department of Laboratory Medicine and Pathology and the Transfusion Medicine/Donor Center, Children's National Medical Center, Washington, DC 20010, USA.
D001773:Blood Cells / Q000187:drug effects / Q000382:microbiology / Q000528:radiation effects; D011564:Furocoumarins / Q000494:pharmacology; D006086:Graft vs Host Disease / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D017319:Photosensitizing Agents / Q000494:pharmacology; D013601:T-Lymphocytes / Q000187:drug effects* / Q000528:radiation effects; D065227:Transfusion Reaction; D014466:Ultraviolet Rays; D014965:X-Rays
D011564:Furocoumarins; D017319:Photosensitizing Agents