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  • Title: Microglia replenished OHSC: A culture system to study in vivo like adult microglia.
    Author: Masuch A, van der Pijl R, Füner L, Wolf Y, Eggen B, Boddeke E, Biber K.
    Journal: Glia; 2016 Aug; 64(8):1285-97. PubMed ID: 27145902.
    Abstract:
    Recent data suggest that ramified microglia fulfil various tasks in the brain. However, to investigate this unique cell type cultured primary microglia are only a poor model. We here describe a method to deplete and repopulate organotypic hippocampal slice cultures (OHSC) with ramified microglia isolated from adult mouse brain creating microglia-replenished OHSC (Mrep-OHSC). Replenished microglia integrate into the tissue and ramify to a degree indistinguishable from their counterparts in the mouse brain. Moreover, wild-type slices replenished with microglia from TNFα-deficient animals provide similar results as OHSC prepared from microglia-specific TNFα-knockout mice (CX3CR1(cre) /TNFα(fl/fl) ). Furthermore, this study demonstrates that replenished microglia in OHSC maintain original functions and properties acquired in vivo. Microglia from ERCC1(Δ/ko) mice, a mouse model of accelerated aging, maintain enhanced Mac2 expression and their activated phenotype after replenishment to wild-type OHSC tissue. Thus, the present study demonstrates that Mrep-OHSC are a unique tool to construct chimeric brain slices allowing studying the function of different phenotypes of in vivo like microglia in a tissue culture setting. GLIA 2016 GLIA 2016;64:1285-1297.
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