Volume 186, Issue 5 pp. 655-667
Review

The long and winding road to pathogen reduction of platelets, red blood cells and whole blood

Paolo Rebulla

Corresponding Author

Paolo Rebulla

Department of Transfusion Medicine and Haematology, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy

Correspondence: Paolo Rebulla, MD, Department of Transfusion Medicine and Haematology, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Via Francesco Sforza 35, 20122, Milan, Italy.

E-mail: [email protected]

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First published: 14 July 2019
Citations: 21

Summary

Pathogen reduction technologies (PRTs) have been developed to further reduce the current very low risks of acquiring transfusion-transmitted infections and promptly respond to emerging infectious threats. An entire portfolio of PRTs suitable for all blood components is not available, but the field is steadily progressing. While PRTs for plasma have been used for many years, PRTs for platelets, red blood cells (RBC) and whole blood (WB) were developed more slowly, due to difficulties in preserving cell functions during storage. Two commercial platelet PRTs use ultra violet (UV) A and UVB light in the presence of amotosalen or riboflavin to inactivate pathogens’ nucleic acids, while a third experimental PRT uses UVC light only. Two PRTs for WB and RBC have been tested in experimental clinical trials with storage limited to 21 or 35 days, due to unacceptably high RBC storage lesion beyond these time limits. This review summarizes pre-clinical investigations and selected outcomes from clinical trials using the above PRTs. Further studies are warranted to decrease cell storage lesions after PRT treatment and to test PRTs in different medical and surgical conditions. Affordability remains a major administrative obstacle to PRT use, particularly so in geographical regions with higher risks of transfusion-transmissible infections.

Disclosure of conflicts of interests

The author has previously received institutional research grants from Cerus and Terumo BCT to support the IPTAS clinical trial, and honoraria and travel expenses from Terumo BCT. The author has previously been a member of the scientific advisory board of Macopharma.

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