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The Role of Gut-brain Axis in Regulating Glucose Metabolism After Acute Pancreatitis.

OBJECTIVES: Diabetes has become an epidemic in developed and developing countries alike, with an increased demand for new efficacious treatments. A large body of pre-clinical evidence suggests that the gut-brain axis may be exploited as a potential therapeutic target for defective glucose homeostasis. This clinical study aimed to investigate a comprehensive panel of glucoregulatory peptides, released by both the gut and brain, in individuals after acute pancreatitis.

METHODS: Fasting levels of glucagon-like peptide-1 (GLP-1), glicentin, oxyntomodulin, peptide YY, ghrelin, cholecystokinin, vasoactive intestinal peptide (VIP), and secretin were studied. Modified Poisson and multivariable linear regression analyses were conducted. Pre-determined concentration ranges were used to categorize each peptide into quartiles.

RESULTS: A total of 83 individuals were included, of who 30 (36%) developed abnormal glucose metabolism (AGM) after acute pancreatitis. In individuals with AGM, the highest quartile of oxyntomodulin differed most significantly from the lowest quartile with a prevalence ratio (PR; 95% confidence interval) of 0.50 (0.21, 1.20; P=0.005); of glicentin with a PR of 0.26 (0.13, 0.54; P<0.001); and of VIP with a PR of 0.34 (0.13, 0.89; P=0.043). Peptide YY, GLP-1, cholecystokinin, ghrelin, and secretin were not significantly associated with AGM.

CONCLUSIONS: Fasting circulating oxyntomodulin, glicentin, and VIP levels are significantly decreased in patients with defective glucose homeostasis after acute pancreatitis. Oxyntomodulin appears to be a promising therapeutic target for future clinical studies on diabetes associated with diseases of the exocrine pancreas.

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