Figure 6From: Particulate matter air pollution causes oxidant-mediated increase in gut permeability in mice Exposure to PM does not cause histologic changes in gastric, small bowel and colonic mucosa at 24 or 48 hours. Wild-type cells were treated with either PBS (vehicle) or PM via gastric gavage and histology (H&E staining) of gastric, small bowel and colonic tissue was evaluated 48 hours after exposure. Representative photomicroographs from a total of 5 animals/treatment group are shown (x100 magnification).Back to article page