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Regional difference in inflammatory response to LPS-injection in the brain: Role of microglia cell density

AuthorsPintado, Cristina; Revilla, Elisa; Vizuete, Marisa; Jiménez, Sebastián; García Cuervo, Luisa; Vitorica, Javier ; Ruano, Diego; Castaño, Angélica
Substantia nigra
Microglia density
Issue Date2011
CitationJournal of Neuroimmunology 238(1-2): 44-51 (2011)
AbstractTo elucidate whether density of cells could contribute to the extent of microglial activation, we performed in vitro assays using three different densities of N13 microglia stimulated with LPS. Our results showed that induction of pro-inflammatory factors as TNF-α and iNOS was directly related to cell density, meanwhile the induction of the anti-inflammatory IL-10 was inversely related to cell density. Accordingly, in vivo assays showed that after LPS-injection, iNOS expression was more intense in substantia nigra, a brain area showing specific susceptibility to neurodegeneration after microglia activation, whereas IL-10 expression was more sustained in striatum, an area resistant to damage. These results support that microglia density is pivotal to control the balance between pro- and anti-inflammatory factors release. © 2011 Elsevier B.V.
Publisher version (URL)http://dx.doi.org/10.1016/j.jneuroim.2011.06.017
Identifiersdoi: 10.1016/j.jneuroim.2011.06.017
issn: 0165-5728
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