Indomethacin-induced lesions in the small intestine were evaluated by measuring the injured area and by histopathology. Also assessed were myeloperoxidase (MPO) activity, as an index of find more neutrophil accumulation, and intestinal mRNA expression for inflammatory cytokines. Results:  The area of macroscopic ulcerative lesions, the MPO activity and the mRNA expression of inflammatory-associated chemokines, such as keratinocyte chemoattractant (KC), monocyte chemotactic protein-1

(MCP-1), and granulocyte-colony stimulating factor (G-CSF), were significantly increased in indomethacin-treated groups compared with the sham groups. The development of intestinal lesions by indomethacin was inhibited in IL-17A-/- mice compared with wild-type mice, together screening assay with significant suppression of the increased levels of MPO activities and KC, MCP-1, and G-CSF levels. Conclusion:  These findings demonstrate that IL-17A contributes to the development of indomethacin-induced small intestinal injury through upregulation of G-CSF, KC, and MCP-1. IL-17A might be a promising new therapeutic target to treat NSAID-induced enteritis. “
“In HEPATOLOGY, Brufau et al.1 recently reported their examination

of the effect of colesevelam, a potent bile acid sequestrant, on glycemic control and bile acid kinetics in patients with type 2 diabetes. Colesevelam improved glycemic parameters and caused the expected increase in cholic acid synthesis. However, the authors “found no correlation between markers of insulin resistance/glucose metabolism and bile acid metabolism,” and they concluded that a firm link between bile acid and glucose metabolism in type 2 diabetes mellitus remained elusive. The purpose of this note is to propose a mechanism by which colesevelam improves glycemic control in patients with type 2 diabetes. The mechanism is increased release of glucagon-like peptide 1 (GLP-1) from the L cells of the ileum. This GLP-1 release is induced by fatty acids that reach the ileum because of defective micellar solubilization in the jejunum. In a healthy person, fatty acids

上海皓元医药股份有限公司 are generated by pancreatic lipases acting at the triglyceride/water interface. Fatty acids are solubilized in mixed micelles with conjugated bile acids. Normally, fatty acid absorption is remarkably efficient and complete by the proximal jejunum. When a bile acid sequestrant is administered, it binds bile acids, removes them from solution, and decreases the fatty acid concentration in the aqueous phase.2 Fatty acids that are not solubilized in micelles can be absorbed by the diffusion of individual molecules through the aqueous boundary layer, but this is a slow process. Fatty acids will remain in an emulsified form; experimentally, absorption from an emulsion is slower than absorption from a micellar solution.3 As a result, fatty acids will pass into the ileum, where they will enter L cells and stimulate GLP-1 release.