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- W3038049609 abstract "ABSTRACT Objective: Lung - recruited Ly6C hi monocytes had been shown to be involved in ventilator-induced lung injury (VILI). Our present study aimed to investigate whether the cyclooxygenase-2 (COX-2) inhibition modulates the function of lung - recruited Ly6C hi monocytes in a mouse model of VILI. Methods: Mice were exposed to lipopolysaccharide (LPS; 20 ng) intraperitoneally prior to injurious mechanical ventilation (Vt = 30 mL/kg, PEEP = 0 cmH 2 O). A subgroup of mice was treated with intravenous parecoxib (30 mg/kg), a COX-2 inhibitor, 1 h prior to ventilation. Control mice received saline and were not ventilated. At the end of the experiment, blood gas analysis was performed and lung tissue was collected for histological assessment. Flow cytometry was employed to quantify the different populations of lung monocytes/macrophages and their function. Isolated Ly6C hi cells were used to measure the intracellular concentrations of reactive oxygen species (ROS) and nitric oxide (NO) by fluorescent probes, and cytokine production by cytometric bead array. Results: Exposure to LPS and injurious ventilation was associated with severe lung histological damage, oxygenation impairment, and pulmonary edema; all of which were largely attenuated following the treatment of parecoxib. Furthermore, flow cytometry analysis revealed that parecoxib caused a reduction in the number of the lung-recruited CD11b lo Ly6C hi monocytes while there was no effect on tissue-resident CD64 + alveolar macrophages. In addition, the production of oxidative stress products (ROS, NO), MHC-II expression, and inflammatory cytokines in response to LPS and VILI in CD11b lo Ly6C hi monocytes was ameliorated by parecoxib. Conclusion: Parecoxib-induced alleviation of oxidative stress and inflammation in lung-recruited Ly6C hi monocytes may partly explain the beneficial action of COX-2 inhibition in VILI." @default.
- W3038049609 created "2020-07-02" @default.
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- W3038049609 date "2020-06-23" @default.
- W3038049609 modified "2023-10-17" @default.
- W3038049609 title "Paracoxib Alleviates Ventilator-Induced Lung Injury Through Functional Modulation of Lung-Recruited CD11bloLy6Chi Monocytes" @default.
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- W3038049609 doi "https://doi.org/10.1097/shk.0000000000001591" @default.
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