Contamination of the blood supply with bacteria, viruses, and parasites is a major public health concern. While donor selection and screening of blood products for transfusion-transmitted pathogens (TTPs) has drastically reduced the incidence of transfusion-transmitted infections (TTIs), risks still remain. The emergence of new TTPs that affect the blood supply compounds the risk further. There remains a genuine need to reduce TTPs associated with both current and emerging infectious diseases (EIDs). Pathogen reduction technology (PRTs) that uses physical and chemical means to reduce TTPs in transfusable blood products offer a powerful approach for addressing blood-borne EIDs. However, the physical and chemical treatment of blood products creates new challenges in terms of preserving an optimal level of the blood product function. For example, treatment of blood with ultraviolet (UV) light or chemicals can damage blood cells and impede their functions. Additionally, chemicals, such as photosensitizers, need to be removed from treated blood products prior to transfusion.
This novel PRT uses visible light alone, without the use of chemicals/photosensitizers, to inactivate TTPs in plasma and platelet concentrates derived from whole blood. This PRT consists of an apparatus and a methodology for reducing pathogens in blood products. Unlike other PRTs, this technology reduces TTPs in blood plasma and platelet concentrates without the use of UV light, photosensitizers, or chemicals that can reduce the performance of blood components. This PRT has demonstrated the ability to significantly reduce the bacterial load (CFU) of S. aureus, S. epidermidis, and E coli in plasma. Furthermore, it was shown to significantly reduce the virucidal activity (PFU) of Feline Calicivirus in plasma. This PRT provides a simple and affordable solution for efficiently reducing pathogens in blood components with the potential for use in any setting including remote regions of the world.
|Potential Commercial Applications
Development Stage: prototype, proof of concept studies
Inventors: Chintamani Atreya, Michelle Maclean, John Anderson, and Scott MacGregor
“A new proof of concept in viral inactivation: virucidal activity of 405 nm light against feline calcivirus as a model for norovirus decontamination” Food Environ Virol 2017;9(159): PMID: 28040848
“A new proof of concept in bacterial reduction: antimicrobial action of violet-blue light (405nm) in ex-vivo stored plasma” J Blood Transfus 2016;2016:2920514: PMID: 27774337
U.S. Nonprovisional Application: 15/765,424, filed 04.02.2018
European Patent Application: EP20160784311, filed 04.30.2018
Product Area: Antimicrobials, bacterial infectious disease
FDA Reference No: E-2014-013
Bill Ronnenberg, M.S., J.D./M.I.P.
FDA Technology Transfer Program