Oxidative stress and hypoxia-induced factor 1α expression in gastric ischemia

Figure 4 Photomicrographs of hypoxia-induced factor 1α (HIF-1α) immunohistochemistry in the gastric tissue (magnification 20 ×). The thickness of gastric containing HIF-1α-positive gastric cells was determined at a 6-h time point. A: Weak the glandular epithelial cytoplasm and the vascular endothelial cytoplasm staining in Sham-operated group gastric; B: Strong the glandular epithelial cytoplasm, and the vascular endothelial cytoplasm and nuclear staining in ischemia/reperfusion (I/R) group gastric; C: Moderate the glandular epithelial cytoplasm, and the vascular endothelial cytoplasm and nuclear staining in ischemic post-conditioning (IpostC) group gastric; D: SUM IOD of HIF-1α expression level in sham-operated, I/R and IpostC groups of gastric tissue (mean ± SD; n < 8); ^aP< 0.01 vs sham-operated group; ^bP< 0.01 vs I/R group.