Moreover, it is cost-effective because the
de-airing time is short and no extra expenses are involved.”
“Parkinson disease is a specific form of neurodegeneration characterized by a loss of nigra-striatal dopaminergic neurons in the midbrain of humans. The disease is also characterized by an increase in oxidative stress and a loss of glutathione in the midbrain region. A potential Dinaciclib supplier link between all these factors is the oxidation of dopamine to dopaminochrome (DAC). Using the murine mesencephalic cell line MN9D, we have shown that DAC [50-250 mu M] leads to cell death in a concentration-dependent manner, whereas oxidized L-dopa, dopachrome [50-250 mu M] is only toxic at the highest concentration used. Furthermore, chronic exposure of MN9D cells to low concentrations of DAC [50-100 mu M] is cytotoxic between 48 and 96 h. DAC also increases superoxide production within MN9D cells as indicated by dihydroethidium fluorescence, that can be prevented by co-administration with the antioxidant, N-acetylcysteine [5 mM]. Moreover, the
cytotoxicity induced by DAC can also be prevented by administration of N-acetylcysteine [1-5 mM]. Finally, depletion of reduced glutathione in MN9D cells by buthionine EPZ004777 sulfoximine 150-100 mu M] administration significantly enhances the cytotoxic effect of low concentrations of DAC [50-100 mu M] and DAC 1175 mu M] itself reduces the proportion of oxidized glutathione in total glutathione within 30 min of administration in MN9D cells. Overall, we have shown that DAC causes MN91) cell death in an oxidatively dependent manner that appears closely linked with a rapid loss of reduced glutathione. These findings have implications for understanding the pathogenesis of neurodegenerative pathways in Parkinson disease. Fedratinib chemical structure (C) 2009 Elsevier Inc. All rights reserved.”
“Objective: Vascular endothelial growth
factor, a critical factor in angiogenesis, mediates stem cell paracrine protective effects on ischemic myocardium. Studies on the role of sex in stem cell function have demonstrated that female mesenchymal stem cells produce greater vascular endothelial growth factor and provide better cardiac protection compared with male mesenchymal stem cells. The purpose of this study was to determine the mechanisms by which estrogen affects mesenchymal stem cell function as a potential therapeutic measure during ex vivo expansion, before therapeutic use.
Methods: Asingle-step purification method using adhesion to cell culture plastic was adopted to isolate mesenchymal stem cells from wild-type, estrogen receptor-alpha knockout, estrogen receptor-beta knockout, and signal transducer and activator of transcription 3 knockout mice. Mesenchymal stem cells were treated with or without 17 beta-estradiol, estrogen receptor-alpha agonist (propyl pyrazoletriol), and estrogen receptor-beta agonist (diarylpropionitrile).