Figure 5: Effect of hWJMSCs on IL-6 expression in the ARDS rat model. (A) Histopathology of the lung tissues. IL-6 positive cells are distinguishable by their brown cytoplasmic staining (red arrows) and hematoxylin counterstain (blue) (scale bar: 50 μm and 40× magnification); (B) Bar graphs show IL-6 expression. Data are presented as mean±SD of pentaplicates and analyzed by one-way analysis of variance followed by Tukey HSD post hoc test. Different letters show a significant difference, P<0.05. I : negative control; II : positive control (LPS-induced rat); III: LPS+hWJMSCs 5×104 cells/kg BW; IV : LPS+hWJMSCs 5×105 cells/kg BW; and V : LPS+hWJMSCs 5×106 cells/kg BW.