CCR2 deficiency impairs immune cell infiltration into the injured parenchyma CCR2 deficiency impairs immune cell infiltration into the injured parenchyma.

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CCR2 deficiency impairs immune cell infiltration into the injured parenchyma CCR2 deficiency impairs immune cell infiltration into the injured parenchyma A, BConfocal images of Iba1 and CD45 double‐immunostaining in WT (A) and CCR2−/− (B) mice at 3 dpi. The cell nuclei were counterstained with DAPI.C, DOverview of the lesioned cortex in heterozygous CCR2RFP/+ (C) and homozygous CCR2RFP/RFP (D) mice.EConfocal images of immune cell infiltrates at 5 dpi show co‐localization of RFP expression and CD45. Pie graphs display the proportion of CD45 cells that were also RFP+ at 3 and 5 dpi.F, GRFP expressing cells were detected in the parenchyma in heterozygous (F), but not in homozygous CCR2RFP/RFP mice where they remained inside blood vessels (G).H, IHistograms depicting the number of proliferating glial cells at 3 dpi (H) (ns, P = 0.2286 for all Ki67+ cells, n = 4 for WT and n = 3 for CCR2−/−; P = 0.1143 for Iba1+Ki67+, n = 4 WT, n = 3 CCR2−/−; P = 0.600 for GFAP+Ki67+, n = 3) and the proportion of juxtavascular proliferating astrocytes among all proliferating astrocytes at the injury site of WT and CCR2−/− mice at 5 dpi (I). All data (individual data points, i.e., animals, are indicated as dots or squares) are represented as mean ± SEM per independent experiments (n ≥ 3). Significance of differences between means was analyzed using Mann–Whitney test.Data information: The dashed lines indicate the site of injury. Scale bars: 150 μm (C, D), 100 μm (A, B), 30 μm (F, G). Jesica Frik et al. EMBO Rep. 2018;embr.201745294 © as stated in the article, figure or figure legend