This study provides the evidence of increased serum gastrointestinal motility hormone concentrations including ghrelin, motilin and gastrin in cattle with displacement of abomasum (DA). In this study, 38 cows with DA (21 left DA (LDA) and 17 right DA (RDA)) and 15 healthy controls were included. All cattle with DA were at the stage of postpartum one to eight weeks, and had clinical signs including anorexia, decreased milk yield and scanty, pasty faeces. Serum ghrelin, motilin and gastrin concentrations, and leptin concentration which is a functional antagonist of ghrelin, were determined by ELISA. Serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), Na, K, Cl, Ca and P concentrations were measured by spectrophotometer. In serum biochemical analysis, increases were seen on the serum ALT, AST and GGT activities; however, serum Na, K, Cl and P concentrations decreased in abomasal displacement compared with the control animals. The serum ghrelin, motilin and gastrin concentrations increased in the cattle with LDA and RDA, as compared with those in the healthy controls. On the other hand, serum leptin concentration decreased in the cattle with DA compared with the controls. Increases in the serum ghrelin, motilin and gastrin concentrations might be attributed to activation of gastrointestinal motility hormones to enhance of gastric emptying in impaired gastric motility and/or outlet occlusion in displaced abomasum.
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