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      Antioxidant effect of human adult adipose-derived stromal stem cells in alveolar epithelial cells undergoing stretch.

      Respiratory Physiology & Neurobiology

      Young Adult, metabolism, Stromal Cells, Stress, Mechanical, cytology, Respiratory Mucosa, Pulmonary Alveoli, physiology, Oxidative Stress, Middle Aged, Humans, Cells, Cultured, Adult Stem Cells, Adult, Adipose Tissue

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          Abstract

          Alveolar epithelial cells undergo stretching during mechanical ventilation. Stretch can modify the oxidative balance in the alveolar epithelium. The aim of the present study was to evaluate the antioxidant role of human adult adipose tissue-derived stromal cells (hADSCs) when human alveolar epithelial cells were subjected to injurious cyclic overstretching. A549 cells were subjected to biaxial stretch (0-15% change in surface area for 24h, 0.2Hz) with and without hADSCs. At the end of the experiments, oxidative stress was measured as superoxide generation using positive nuclear dihydroethidium (DHE) staining, superoxide dismutase (SOD) activity in cell lysates, 8-isoprostane concentrations in supernatant, and 3-nitrotyrosine by indirect immunofluorescence in fixed cells. Cyclically stretching of AECs induced a significant decrease in SOD activity, and an increase in 8-isoprostane concentrations, DHE staining and 3-nitrotyrosine staining compared with non-stretched cells. Treatment with hADSCs significantly attenuated stretch-induced changes in SOD activity, 8-isoprostane concentrations, DHE and 3-nitrotyrosine staining. These data suggest that hADSCs have an anti-oxidative effect in human alveolar epithelial cells undergoing cyclic stretch. Copyright © 2013 Elsevier B.V. All rights reserved.

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          Journal
          10.1016/j.resp.2013.04.007
          23643709

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