Figure 3.

Expression of occludin and NOS proteins in the gastric mucous membrane epithelial cells was detected by immunohistochemistry. (A and C) High bleeding risk group in the extreme cold climate; (B and D) low bleeding risk group in the extreme hot climate (brown-red indicates positive staining; original magnification, ×200). The expression levels of occludin and NOS in the high bleeding risk group in the extreme cold climate were significantly lower than those in the extreme hot climate. NOS, nitric oxide synthase.