Receptor of advanced glycation end products immune-staining in villi (A, C, E) and crypt (B, D, F) of duodenum (A, B), jejunum (C, D) and ileum(E, F) as well as in ileum ganglia (arrowhead; G: Normal group; H: GK group). As shown in the magnification area (big frame vs small frame), the RAGE homogeneously distributed in the epithelia cells. The intensity of immune-staining in ganglia was stronger in the diabetic group (H) than in the normal group (G) (arrowhead). RAGE: Receptor of advanced glycation end products; GK: Inherited type 2 diabetic Goto-Kakizak rats.