Figure 2. Histopathological examination of the pancreas (hematoxylin and eosin staining, original magnification, ×400). A, SO group, 3h; B, SO group, 6h; C, SO group, 12h; D, SAP group, 3h; E, SAP group, 6h; F, SAP group, 12h; G, Pi group, 3h; H, Pi group, 6h; I, Pi group, 12h. SO: sham operation group; SAP severe acute pancreatitis group, Pi: pioglitazone group.