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- W4313359618 startingPage "49.26" @default.
- W4313359618 abstract "Abstract Neutrophils are essential for killing microorganisms and have a significant role in regulation of inflammatory response. Generation of reactive oxygen species (ROS) is one of the critical events that modulate the immune response in phagocytic cells. Stimulated neutrophils activate membrane-associated NADPH oxidase (NOX2) resulting in a powerful oxidative burst during which a large amount of oxygen is consumed generating ROS. The Agilent Seahorse XF analyzer is used to quantify oxygen consumption rate (OCR) as a direct non-invasive measure of neutrophil activation. In this study, neutrophil activation in the presence of cytokines known to be expressed within microenvironments in normal and disease states is evaluated. Treatment of neutrophils with the inflammatory cytokine TNFα induces oxidative burst within an hour of treatment, as observed in real time using the XF analyzer. Interestingly, pretreatment with TNFα reduces the oxidative burst observed when neutrophils were activated with phorbol myristate acetate (PMA). In contrast, treatment with GM-CSF and IL1 β had no acute effect in inducing oxidative burst. Rather, pretreatment of neutrophils with GM-CSF and IL1 β primed them for an enhanced response to PMA and a reduced elapsed time to reach maximal activation. Of note, the oxidative burst observed is associated with simultaneous increased of proton efflux rate (PER), indicative of the dependence on glycolysis and pentose phosphate pathway for production of NADPH during oxidative burst. These results, show the utility of the XF neutrophil activation assay to study the effect of modulators such drug treatments, microenvironment and disease progression during innate immune response." @default.
- W4313359618 created "2023-01-06" @default.
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- W4313359618 date "2018-05-01" @default.
- W4313359618 modified "2023-09-28" @default.
- W4313359618 title "Modulation of oxidative burst with exposure to cytokines in neutrophil cell activation" @default.
- W4313359618 doi "https://doi.org/10.4049/jimmunol.200.supp.49.26" @default.
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