Figure 3
(A) Histological analysis indicated LPS injection caused capillary expansion and congestion, as well as neutrophil infiltration into the lung tissue. In addition, lung septae was noticeably thickened. Administration of UC-MSCs improved the lung injury at all time points. (B) Lung injury score decreased significantly in the MSC + LPS group at all time points (*, p < 0.05 compared with healthy controls; #, p < 0.05 comparing LPS plus UC-MSCs with LPS alone.). Fibroblast injections have no effect on improvement of both pathological morphology and lung injury score.