1. Differential response of immortalized human amnion mesenchymal and epithelial cells against oxidative stress.
- Author
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Han LG, Zhao QL, Yoshida T, Okabe M, Soko C, Rehman MU, Kondo T, and Nikaido T
- Subjects
- Amnion cytology, Amnion metabolism, Antioxidants metabolism, Apoptosis genetics, Apoptosis radiation effects, Caspase 3 genetics, Caspase 8 genetics, Cell Line, Cell Survival genetics, Cell Survival radiation effects, Epithelial Cells cytology, Epithelial Cells metabolism, Fibroblasts transplantation, Heme Oxygenase-1 genetics, Humans, Hydrogen Peroxide metabolism, Mesoderm cytology, Mesoderm metabolism, NF-E2-Related Factor 2 genetics, Oxidation-Reduction, Oxidative Stress radiation effects, Reactive Oxygen Species metabolism, Signal Transduction genetics, Signal Transduction radiation effects, Superoxide Dismutase genetics, X-Rays adverse effects, Amnion transplantation, Epithelial Cells transplantation, Mesoderm transplantation, Oxidative Stress genetics
- Abstract
Cells are equipped with various antioxidant defense factors to antagonize insults from reactive oxygen species (ROS), thus the antioxidant capacity has been characterized by a variety of cellular responses during the pathophysiological processes. Amniotic cells have been extensively applied in clinical practice for burn treatment, corneal repair, and tissue regeneration. However, the antioxidative properties of amniotic cells have not yet been fully understood. Therefore, the current study was aimed to observe the response of amniotic cells against ROS stimuli, and to investigate the underlying molecular mechanisms. The immortalized human amniotic mesenchymal cells (iHAMs) and immortalized human amniotic epithelial cells (iHAEs) were used. The human skin fibroblast (HSF) was used as a control cell line. Changes in intracellular ROS generation, cell viability, and cellular morphology were investigated to reveal the response of amniotic cells against oxidative stresses induced by x-rays and hydrogen peroxide. In addition, expression of apoptosis-related proteins and response to antioxidative stress was also examined. The intracellular ROS level and cell apoptosis in iHAMs was remarkably increased. iHAEs showed relatively high resistance to ROS stimulation, which can be attributed to the high SOD2 expression and up-regulation of Nrf2, HO-1 after x-rays exposure. In contrast, iHAMs were found sensitive to oxidative damage. Expression of caspase-3, caspase-8 and BAX was increased, whereas down-regulation of Bcl-xL, Nrf2, HO-1, and TrxR-1. Taken together, findings have highlighted the characterization of response of amniotic derived epithelial and mesenchymal cells to oxidative stress. In physiological processes, iHAMs may play an important role to maintain the homeostasis of the pregnancy environment. However, under oxidative stimulations, iHAEs provides protection against oxidative damage in amnion tissue., (Copyright © 2019 Elsevier Inc. All rights reserved.)
- Published
- 2019
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