Add time:08/09/2019         Source:sciencedirect.com

1. A gastric mucosal laminin receptor has been isolated from the epithelial cell membrane by affinity chromatography on Sepharose-bound laminin, and following radioiodination was incorporated into liposomes which displayed specific affinity towards the laminin-coated surface.2. The binding of liposomal receptor to the laminin-coated surface was inhibited by Helicobacter pylori lipopolysaccharide and reached a maximum value of 96% at 50 μg/ml.3. The inhibitory effect of H. pylori lipopolysaccharide on the receptor-laminin binding was prevented by an antiulcer agent, nitecapone. The effect was concentration dependent and produced a maximum response of 83% at 30 μg/ml of drug concentration.4. The results demonstrate that H. pylori is capable of disrupting gastric mucosal integrity by interfering with epithelial cell-laminin binding, and that an antiulcer agent, nitecapone, counteracts this effect.

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