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- Title
Platelet extracellular vesicles and their mitochondrial content improve the mitochondrial bioenergetics of cellular immune recipients.
- Authors
Pelletier, Martin; Breton, Yann; Allaeys, Isabelle; Becker, Yann; Benson, Tom; Boilard, Eric
- Abstract
Background: Mitochondria play a critical role in the production of cell energy and the regulation of cell death. Therefore, mitochondria orchestrate numerous cell effector functions, including fine‐tuning the immune system. While mitochondria are mainly found intracellularly, they can escape the confine of the cell during the process of extracellular vesicle release. Platelets patrol blood vessels to ensure vasculature integrity and to support the immune system. In blood, platelets are the primary source of circulating mitochondria. Activated platelets produce extracellular vesicles, including a subset of mitochondria‐containing vesicles. Study Design and Methods: We characterized mitochondrial functions in platelet‐derived extracellular vesicles, and examined whether they could impact the bioenergetics of cellular immune recipients using an extracellular flux analyzer to measure real‐time bioenergetics. Results: We validated that extracellular vesicles derived from activated platelets contain the necessary mitochondrial machinery to respirate and generate energy. Moreover, neutrophils and monocytes efficiently captured platelet‐derived extracellular vesicles, enhancing their mitochondrial fitness. This process required functional mitochondria from donor platelets, as it was abolished by the inactivation of extracellular mitochondria using mitochondrial poison. Discussion: Together, the data suggest that extracellular mitochondria produced by platelets may support other metabolic functions through transcellular bioenergetics.
- Subjects
EXTRACELLULAR vesicles; BIOENERGETICS; CELLULAR control mechanisms; BLOOD platelets; CELL physiology; CELL communication; CELL death
- Publication
Transfusion, 2023, Vol 63, Issue 10, p1983
- ISSN
0041-1132
- Publication type
Article
- DOI
10.1111/trf.17524