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Histological analysis of the effects of blank PLGA-DPPs on OVA-induced asthmatic mice. Representative H&E-stained (left panel) and PAS-stained (right panel) sections of the lungs. Black arrows in the H&E staining image indicate the infiltration of inflammatory cells. Red arrows in the PAS staining image indicate PAS-positive goblet cells. The scale bars represent 400 µm (upper panel) and 200 µm (lower panel).
