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Gastric outlet obstruction (GOO) is caused mainly by pyloric or duodenal blockage; gastric surgery and vagotomy are effective treatments. We investigated the short term effects of experimental GOO and truncal vagotomy (TV) on gut hormone levels. We used 8-week-old male Wistar rats divided randomly into four groups: control, GOO, TV, and GOO + TV. At the end of the experiment, blood and tissue samples of the pylorus and fundus were obtained for biochemical and immunohistochemical analysis. Gastric motility decreased in the TV group, but there was no difference in food intake compared to the control group; water consumption and urine output were increased. Feces excretion and food intake decreased due to loss of food movement from the stomach of GOO and GOO + TV rats. Levels of insulin and ghrelin were lower than for the control group, but levels of cholecystokinin were higher. Leptin and glucagon-like peptide 1 levels were increased in the GOO group, while somatostatin was decreased. Leptin immunostaining levels were decreased in the GOO + TV group. Gastrin and neuropeptide Y levels were lower in the GOO and GOO + TV groups compared to the other groups. We found that both gut hormone levels related to gastric motility and metabolism, and immunohistochemical staining of the stomach tissue were altered by TV and GOO. Measuring changes in gut hormones following gastric surgery could be useful for monitoring the effectiveness of treatment.

Short term effects of experimental gastric outlet obstruction and truncal vagotomy on gut hormones