Volume 61, Issue S1 pp. S58-S67
SUPPLEMENT ARTICLE

Refrigeration of apheresis platelets in platelet additive solution (PAS-E) supports in vitro platelet quality to maximize the shelf-life

Lacey Johnson

Corresponding Author

Lacey Johnson

Research and Development, Australian Red Cross Lifeblood, Alexandria, New South Wales, Australia

Correspondence

Lacey Johnson, Research and Development, Australian Red Cross Lifeblood, 17 O'Riordan St, Alexandria, NSW, Australia.

Email: [email protected]

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Shuchna Vekariya

Shuchna Vekariya

Research and Development, Australian Red Cross Lifeblood, Alexandria, New South Wales, Australia

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Ben Wood

Ben Wood

Research and Development, Australian Red Cross Lifeblood, Alexandria, New South Wales, Australia

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Shereen Tan

Shereen Tan

Research and Development, Australian Red Cross Lifeblood, Alexandria, New South Wales, Australia

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Christopher Roan

Christopher Roan

Research and Development, Australian Red Cross Lifeblood, Alexandria, New South Wales, Australia

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Denese C. Marks

Denese C. Marks

Research and Development, Australian Red Cross Lifeblood, Alexandria, New South Wales, Australia

Sydney Medical School, The University of Sydney, Camperdown, New South Wales, Australia

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First published: 16 July 2021
Citations: 17
Abbreviations: PAS, platelet additive solution; RT, room temperature.

Abstract

Background

Refrigeration, or cold-storage, of platelets may be beneficial to extend the limited shelf-life of conventionally stored platelets and support transfusion protocols in rural and military areas. The aim of this study was to compare the morphologic, metabolic, and functional aspects of apheresis platelets stored at room-temperature (RT) or cold conditions, in either plasma or supplemented with platelet additive solution (PAS).

Study design and methods

Double-dose apheresis platelets were collected in either 100% plasma or 40% plasma/60% PAS-E using the Trima apheresis platform. One component from each group was either stored at RT (20–24°C) or refrigerated (2–6°C). Platelets were tested over a 21-day period.

Results

The platelet concentration decreased by approximately 30% in all groups during 21 days of storage (p > .05). Cold-storage reduced glycolytic metabolism, and the pH was maintained above the minimum specification (>6.4) for 21 days only when platelets were stored in PAS. The surface phenotype and the composition of the supernatant were differentially affected by temperature and storage solution. Functional responses (aggregation, agonist-induced receptor activation, clotting time) were improved during cold-storage, and the influence of residual plasma was assay dependent.

Conclusion

In vitro platelet quality is differentially affected by storage time, temperature, and solution. Cold-storage, particularly in PAS, better maintains key metabolic, phenotypic, and functional parameters during prolonged storage.

CONFLICT OF INTEREST

The authors have disclosed no conflicts of interest.

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