Luteolin inhibits pancreatitis-induced ADM formation. Hematoxylin and eosin staining of the pancreas in the (A) Ctrl, (B) AP and (C) luteolin groups on day 3. (D) Number of TC per field (magnification, ×200) in the Ctrl, AP and luteolin groups. Immunohistochemistry of CK19 in the (E) Ctrl, (F) AP and (G) luteolin groups on day 1. (H) Number of CK19(+) acini per field (×200) in the Ctrl, AP and luteolin groups on day 1. Immunohistochemistry of CK19 in the (I) Ctrl, (J) AP and (K) luteolin groups on day 3. (L) Number of CK19(+) acini per field (×200) in the Ctrl, AP and luteolin groups on day 3. *P<0.05. Scale bars, 100 µm. ADM, acinar-ductal metaplasia; Ctrl, control; AP, acute pancreatitis group; AP + luteolin, luteolin group; TC, tubular complex; NS, not significant.