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• W2014621947 abstract "Erythropoietin (EPO) plays a prominent role in the regulation of the hematopoietic system, but the potential function of this trophic factor as a cytoprotectant in the cerebral vascular system is not known. The authors examined the ability of EPO to modulate a series of death-related cellular pathways during free radical-induced injury in cerebral microvascular endothelial cells (ECs). Endothelial cell injury was evaluated by trypan blue, DNA fragmentation, membrane phosphatidylserine exposure, apoptotic protease-activating factor-1 (Apaf-1), and Bcl-XL expression, mitochondrial membrane potential, cytochrome c release, and cysteine protease activity. They show that constitutive EPO is present in ECs but is insufficient to prevent cellular injury. Signaling through the EPO receptor, however, remains biologically responsive to exogenous EPO administration to offer significant protection against nitric oxide-induced injury. Exogenous EPO maintains both genomic DNA integrity and cellular membrane asymmetry through parallel pathways that prevent the induction of Apaf-1 and preserve mitochondrial membrane potential in conjunction with enhanced Bcl-XL expression. Consistent with the modulation of Apaf-1 and the release of cytochrome c, EPO also inhibits the activation of caspase-9 and caspase-3-like activities. Identification of novel cytoprotective pathways used by EPO may serve as therapeutic targets for cerebral vascular disease." @default.
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• W2014621947 date "2003-03-01" @default.
• W2014621947 modified "2023-10-10" @default.
• W2014621947 title "Apaf-1, Bcl-x_L, Cytochrome <i>c</i>, and Caspase-9 Form the Critical Elements for Cerebral Vascular Protection by Erythropoietin" @default.
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• W2014621947 doi "https://doi.org/10.1097/01.wcb.0000050061.57184.ae" @default.
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