Background: Antiplatelet reagents have been reported to protect against intestinal damage associated with abdominal radiotherapy, but the mechanisms behind radiation-induced platelet-endothelium interactions are not known. We sought to define the adhesive mechanisms that regulate radiotherapy-induced platelet-endothelial cell interactions in the colon.
Methods: All mice except the controls were exposed to abdominal radiation with a single dose of 20 Gray.
Background: Activated T cells regulate inflammatory diseases in the intestinal tract; however, the adhesive mechanisms governing CD8 T-cell recruitment in the colon are not known.
Methods: Herein, we used a graft-versus-host disease (GvHD) model to study CD8 T-cell rolling and adhesion in the large intestine by use of intravital fluorescence microscopy. Graft-versus-host disease was induced by transferring 50 x 10 allogeneic donor splenocytes from BDF1, B6, H-2b mice to recipient BDF1, H-2 mice.
Background: Our objective was to examine the role of p38 mitogen-activated protein kinase (MAPK) in ischemia-reperfusion (I/R)-induced recruitment or leukocytes in the colon.
Methods: C57/Bl6 mice were subjected to 30 minutes of ischemia by clamping the superior mesenteric artery followed by 2 hours of reperfusion. Animals were pretreated with the selective p38 MAPK inhibitors SB 239063 and SKF 86002 before induction of I/R.
Purpose: Radiation therapy is frequently used in treating different types of tumors, although associated with serious side effects, such as fibrosis and complicated diarrhea. This study was designed to define the adhesive mechanisms behind radiotherapy-induced leukocyte recruitment in the colon.
Methods: All mice, except control animals, were radiated with a single dose of 20 Gy.