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• W1981186191 startingPage "2030" @default.
• W1981186191 abstract "purpose. To characterize the effects of dexamethasone in human retinal pericytes (HRMPs), monocytes (THP-1), and retinal endothelial cells (HRECs) treated with high glucose, TNF-α, or IL-1β. methods. HRMP and HREC phenotypes were verified by growth factor stimulation of intracellular calcium–ion mobilization. Glucocorticoid receptor phosphorylation was assessed with an anti-phospho-Ser211 glucocorticoid receptor antibody. Secretion of 89 inflammatory and angiogenic proteins were compared in cells incubated with (1) normal (5 mM) or high (25 mM) d-glucose and (2) control medium, TNF-α (10 ng/mL), or IL-1β (10 ng/mL), with or without dexamethasone (1 nM to 1 μM). The proteins were compared by using multianalyte profile testing. results. HRMPs and HRECs expressed functional PDGFB-R and VEGFR-2, respectively. Dexamethasone induction of glucocorticoid receptor phosphorylation was dose-dependent in all cell types. High glucose increased secretion of inflammatory mediators in HRMPs, but not in HRECs. Dexamethasone dose dependently inhibited secretion of these mediators in HRMPs. For all cells, TNF-α and IL-1β induced a fivefold or more increase in inflammatory and angiogenic mediators; HRMPs secreted the greatest number and level of mediators. Dexamethasone dose dependently inhibited the secretion of multiple proteins from HRMPs and THP-1 cells, but not from HRECs (IC50 2 nM to 1 μM). conclusions. High glucose, TNF-α, and IL-1β induced an inflammatory phenotype in HRMPs, characterized by hypersecretion of inflammatory and angiogenic mediators. Dexamethasone at various potencies blocked hypersecretion of several proteins. Pericytes may be a key therapeutic target in retinal inflammatory diseases, including diabetic retinopathy. Inhibition of pathologic mediators may depend on delivering high levels (∼1 μM) of glucocorticoid to the retina." @default.
• W1981186191 created "2016-06-24" @default.
• W1981186191 creator A5055921834 @default.
• W1981186191 creator A5087660315 @default.
• W1981186191 date "2008-05-01" @default.
• W1981186191 modified "2023-10-11" @default.
• W1981186191 title "Dexamethasone Inhibits High Glucose–, TNF-α–, and IL-1β–Induced Secretion of Inflammatory and Angiogenic Mediators from Retinal Microvascular Pericytes" @default.
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• W1981186191 doi "https://doi.org/10.1167/iovs.07-0273" @default.
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