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- W4323268830 endingPage "148315" @default.
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- W4323268830 abstract "Microglia are the resident immune cells of the brain which regulate both the innate and adaptive neuroimmune responses in health and disease. In response to specific endogenous and exogenous stimuli, microglia transition to one of their reactive states characterized by altered morphology and function, including their secretory profile. A component of the microglial secretome is cytotoxic molecules capable of causing damage and death to nearby host cells, thus contributing to the pathogenesis of neurodegenerative disorders. Indirect evidence from secretome studies and measurements of mRNA expression using diverse microglial cell types suggest different stimuli may induce microglia to secrete distinct subsets of cytotoxins. We demonstrate the accuracy of this hypothesis directly by challenging murine BV-2 microglia-like cells with eight different immune stimuli and assessing secretion of four potentially cytotoxic molecules, including nitric oxide (NO), tumor necrosis factor α (TNF), C-X-C motif chemokine ligand 10 (CXCL10), and glutamate. Lipopolysaccharide (LPS) and a combination of interferon (IFN)-γ plus LPS induced secretion of all toxins studied. IFN-β, IFN-γ, polyinosinic:polycytidylic acid (poly I:C), and zymosan A upregulated secretion of subsets of these four cytotoxins. LPS and IFN-γ, alone or in combination, as well as IFN-β induced toxicity of BV-2 cells towards murine NSC-34 neuronal cells, while ATP, N-formylmethionine-leucyl-phenylalanine (fMLP), and phorbol 12-myristate 13-acetate (PMA) did not affect any parameters studied. Our observations contribute to a growing body of knowledge on the regulation of the microglial secretome, which may inform future development of novel therapeutics for neurodegenerative diseases, where dysregulated microglia are key contributors to pathogenesis." @default.
- W4323268830 created "2023-03-06" @default.
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- W4323268830 date "2023-05-01" @default.
- W4323268830 modified "2023-10-14" @default.
- W4323268830 title "Microglia secrete distinct sets of neurotoxins in a stimulus-dependent manner" @default.
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- W4323268830 doi "https://doi.org/10.1016/j.brainres.2023.148315" @default.
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