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- W2531962189 abstract "This investigation explored the mechanism for microparticles (MPs) production by human and murine platelets exposed to high pressures of inert gases. Results demonstrate that MPs production occurs via an oxidative stress response in a dose-dependent manner and follows the potency series N2>Ar>He. Gases with higher van der Waals volumes or polarizability such as SF6 and N2O, or hydrostatic pressure, do not cause MPs production. Singlet O2 is generated by N2, Ar and He, which is linked to NADPH oxidase (NOX) activity. Progression of oxidative stress involves activation of nitric oxide synthase (NOS) leading to S-nitrosylation of cytosolic actin. Exposure to gases enhances actin filament turnover and associations between short actin filaments, NOS, vasodilator-stimulated phosphoprotein (VASP), focal adhesion kinase (FAK) and Rac1. Inhibition of NOS or NOX by chemical inhibitors or using platelets from mice lacking NOS2 or the gp91phox component of NOX diminish generation of reactive species, enhanced actin polymerization and MP generation by high pressure gases. We conclude that by initiating a sequence of progressive oxidative stress responses high pressure gases cause platelets to generate MPs." @default.
- W2531962189 created "2016-10-28" @default.
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- W2531962189 date "2016-12-01" @default.
- W2531962189 modified "2023-10-15" @default.
- W2531962189 title "Microparticle formation by platelets exposed to high gas pressures – An oxidative stress response" @default.
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- W2531962189 doi "https://doi.org/10.1016/j.freeradbiomed.2016.10.010" @default.
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