(A) Immunofluorescent (IF) staining of gastrin and E-cadherin in duodenums of untreated Men1ΔIEC;Sst−/− mice, Men1ΔIEC;Sst−/− mice treated with (B) OM (OMS) for 6 months and (C) 4 months after withdrawal of OM (WD). (D–F) IF staining for gastrin and (D) Gfap, (E) S100b, and (F) p75 in duodenums of OMS mice. Scale bars: (A–C) - 50 μm, insets - 20μm, (D–F) - 50 μm, insets - 20 μm.