Pathogen reduction treatment using riboflavin and ultraviolet light impairs platelet reactivity toward specific agonists in vitro

Authors

  • Sabrina Zeddies,

    1. Department of Hematopoiesis, University of Amsterdam, Amsterdam, the Netherlands
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  • Iris M. De Cuyper,

    1. Department of Blood Cell Research, Sanquin Research and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
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  • Pieter F. van der Meer,

    1. Department of Product and Process Development, Sanquin Blood Bank, Amsterdam, the Netherlands
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  • Brunette B. Daal,

    1. Department of Product and Process Development, Sanquin Blood Bank, Amsterdam, the Netherlands
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  • Dirk de Korte,

    1. Department of Blood Cell Research, Sanquin Research and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
    2. Department of Product and Process Development, Sanquin Blood Bank, Amsterdam, the Netherlands
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  • Laura Gutiérrez,

    1. Department of Blood Cell Research, Sanquin Research and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
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    • These authors contributed equally to this work.
  • Daphne C. Thijssen-Timmer

    Corresponding author
    1. Department of Hematopoiesis, University of Amsterdam, Amsterdam, the Netherlands
    • Address reprint requests to: Daphne C. Thijssen-Timmer, Department of Hematopoiesis, Sanquin Research, Plesmanlaan 125, 1066CX Amsterdam, the Netherlands; e-mail: d.thijssen@sanquin.nl.

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    • These authors contributed equally to this work.

  • 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.

Abstract

Background

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.

Results

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.

Conclusion

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.

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