Abstract
The aim of this study was to determine the effects of recombinant human interleukin-4 (rhIL-4) on the hypoxia-induced gastric and intestinal injury in the rat pups. The study was performed on 401-day-old Sprague Dawley rat pups. Group 1 (sham) rats served as nonhypoxic controls. Group 2 (rhIL-4 treated /control) rats were administrated rIL-4 alone. Group 3 (hypoxia-reoxygenation [H-O]/untreated) rats were subjected to H-O and were then returned to their mothers. Group 4 (H-O/rhIL-4 treated) rats were subjected to H/O and were treated with rhIL-4 for the next 3 days. All animals were killed on day 4 and gastric and intestinal specimens were obtained to determine the tissue level of malondialdehyde (MDA) and histological changes.In group 3 MDA levels were significantly increased compared with groups 1,2, and 4. In group 4, MDA levels were not significantly different compared with group 3. The gastric and intestinal injury score were increased significantly in the group 3 and 4 rats compared with group 1 and 2. However, this increase was lower in group 4 rats compared with group 3. In group 3, after hypoxia following reoxygenation, exfoliation and necrosis of superficial cells, blood cell infiltration, and structural alterations on the two-third parts of the glandular pits, and bleeding erosions developed in all stomachs. Treatment with rhIL-4 produced a reduction of exfoliation of superficial cells, hemorrhage, and blood cell infiltration. In group 3 animals, destruction of villi and crypts of ileum and in some cases extension to the muscularis were noticed. In contrast, in the rats treated with rhIL-4, lesions were limited essentially to the very tips of the villi. This study found beneficial effects of rhIL-4 in an experimental model of hypoxia-induced gastric and intestinal injury.
Published Version
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