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In vitro effects on platelets irradiated with short‐wave ultraviolet light without any additional photoactive reagent using the THERAFLEX UV‐Platelets method
Author(s) -
Sandgren P.,
Tolksdorf F.,
Struff W. G.,
Gulliksson H.
Publication year - 2011
Publication title -
vox sanguinis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.68
H-Index - 83
eISSN - 1423-0410
pISSN - 0042-9007
DOI - 10.1111/j.1423-0410.2010.01454.x
Subject(s) - platelet , buffy coat , chemistry , lactate dehydrogenase , ultraviolet light , ultraviolet , polyvinyl chloride , in vitro , andrology , biochemistry , food science , chromatography , enzyme , medicine , surgery , immunology , materials science , photochemistry , organic chemistry , optoelectronics
Background A novel short‐wave ultraviolet light (UVC) pathogen reduction technology (THERAFLEX UV‐Platelets; MacoPharma, Mouvaux, France) without the need of any additional photoactive reagent has recently been evaluated for various bacteria and virus infectivity assays. The use of UVC alone has on the one hand been shown to reduce pathogens but may, on the other hand, have some impact on the platelet (PLT) quality. The purpose of this study was to determine the potential effects on PLT quality of pathogen inactivation treatment using the novel UVC method for PLT concentrates. Study Design and Methods Buffy‐coat‐derived PLTs suspended in SSP+ were irradiated with UVC light in plastic bags (MacoPharma) made of ethyl vinyl acetate, considered to be highly permeable to UVC light. The UVC‐treated (test, n = 8) as well as the untreated (reference, n = 8) PLT units were stored in PLT storage bags composed of n‐butyryl, tri n‐hexyl citrate–plasticized polyvinyl chloride (MacoPharma) on a flat bed agitator for in vitro testing during 7 days of storage. Results No significant difference in PLT counts and lactate dehydrogenase between the groups was detected. During storage, glucose decreased more and lactate increased more in the test units. Statistically significant differences were found for glucose ( P < 0·01) and lactate ( P < 0·05) on day 7. ATP levels were higher ( P < 0·01 from day 5) in the reference units. With exception of day 7 ( P < 0·01 reference vs. test), hypotonic shock response reactivity was not different between groups. Extent of shape change was lower ( P < 0·01), and CD62P ( P < 0·05 day 5) was higher in the test units. CD42b and CD41/61 showed similar trends throughout storage, without any significant difference between the units. pH was maintained at >6·8 (day 7) and swirling remained at the highest level (score = 2) for all units throughout storage. Conclusion Our results suggest that irradiation with UVC light has a slight impact on PLT in vitro quality and appears to be insignificant with regard to current in vitro standards.