Figure 4From: Effects of overexpression of IL-10, IL-12, TGF-β and IL-4 on allergen induced change in bronchial responsivenessHistological studies of the lungs of immunized mice with different cytokine gene plasmid treatments. Mice that had been sensitized and repeatedly challenged with nebulized saline (A) or OVA (B-E) were gavaged with non-coding vector, scIL-12, TGF-β, or IL-10 gene plasmids before the challenge phase. The data showed extensive cellular infiltration of the peri- airway region from vector DNA treated mice (B). In contrast, lung tissue from scIL-12 plasmid treated mice (C), TGF-β plasmid treated mice (D), and IL-10 plasmid treated mice (E) showed a much less severe inflammation histologically. Microscopic images were made with an Olympus microscope at a magnification of 100, and images were representative of the experimental group. Paraffin embedded sections were stained with hematoxylin and eosin.Back to article page