These authors contributed equally to this work.
Pathogen reduction treatment using riboflavin and ultraviolet light impairs platelet reactivity toward specific agonists in vitro
Article first published online: 1 APR 2014
© 2014 AABB
Volume 54, Issue 9, pages 2292–2300, September 2014
How to Cite
Zeddies, S., De Cuyper, I. M., van der Meer, P. F., Daal, B. B., de Korte, D., Gutiérrez, L. and Thijssen-Timmer, D. C. (2014), Pathogen reduction treatment using riboflavin and ultraviolet light impairs platelet reactivity toward specific agonists in vitro. Transfusion, 54: 2292–2300. doi: 10.1111/trf.12636
This study was funded by Sanquin Blood Supply, Grant PPOC-09-1639 and Grant PPOC-08-004, the Center for Translational Molecular Medicine (CTMM, http://www.ctmm.nl), Project Innovative Coagulation Diagnostics (INCOAG, Grant 01C-201), and the Dutch Heart Foundation.
- Issue published online: 11 SEP 2014
- Article first published online: 1 APR 2014
- Manuscript Revised: 29 JAN 2014
- Manuscript Accepted: 29 JAN 2014
- Manuscript Received: 10 OCT 2013
- Sanquin Blood Supply. Grant Numbers: PPOC-09-1639, PPOC-08-004
- Center for Translational Molecular Medicine
- Innovative Coagulation Diagnostics. Grant Number: 01C-201
Recent studies showed that Mirasol pathogen reduction treatment (PRT) leads to increased P-selectin expression and increased oxygen and glucose consumption in resting platelets (PLTs). This study investigates the effect of PRT on PLT activation.
Study Design and Methods
Untreated or Mirasol-treated PLTs were analyzed at different time points during storage. Microaggregation upon stimulation with phorbol myristate acetate (PMA), convulxin, and ristocetin was measured. Alpha granule contents and release upon thrombin stimulation were assessed by flow cytometry and Western blotting. PLT spreading was determined on collagen-coated glass slides.
Mirasol PRT led to spontaneous aggregation (hyperreactivity), as measured by flow cytometry in the absence of agonist throughout storage time. PMA-induced aggregation was significantly higher in Mirasol PRT PLTs compared to controls. Aggregation in response to convulxin and ristocetin was significantly lower and directly influenced by storage time after Mirasol PRT, compared to untreated stored PLT concentrates. Despite the reported hyperreactivity of resting PLTs, PLT activation with thrombin on Day 8 after Mirasol PRT resulted in less P-selectin–positive PLTs. Furthermore, platelet factor 4 (PF4) secretion was reduced upon thrombin stimulation on Day 8 after PRT compared to controls. Significantly decreased spreading of Mirasol PRT PLTs over collagen-coated slides was observed directly after PRT and persisted throughout storage.
Mirasol PRT leads to hyperreactive PLTs, probably caused by continuous basal degranulation through storage time. This results in a reduction in the degranulation capacity upon acute stimulation, which influences PLT spreading, but not overtly microaggregation. The clinical relevance needs to be investigated.