Macrophage and neutrophil infiltrations in lung tissues.

(A) Representative confocal images of CD68 (green) with DAPI (blue) (original magnification; ×200, scale bar; 100μm) and the number of CD68-positive cells per high power field of each group (n = 8, 8, 6, 8, 6 and 8 in WT-NC, WT-HC, WT-HM, FPR1-/- -NC, FPR1-/- -HC and FPR1-/- -HM, respectively). (B) Representative confocal images of myeloperoxidase (MPO; green) positive cells with DAPI (blue) and the number of MPO-positive cells per high power field (n = 8, 8, 6, 8, 6 and 8 in WT-NC, WT-HC, WT-HM, FPR1-/- -NC, FPR1-/- -HC and FPR1-/- -HM, respectively). WT-NC, wild type mice of normoxia control; WT-HC, wild type mice of hyperoxia control; WT-HM, wild type mice of hyperoxia with MSCs; FPR1-/- -NC, FPR1 knockout mice of normoxia control; FPR1-/- -HC, FPR1 knockout mice of hyperoxia control; FPR1-/- -HM, FPR1 knockout mice of hyperoxia with MSCs. Data are given as mean ± SEM. * P -/- -NC.