pH-dependent binding of Helicobacter pylori to pig gastric mucins |
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Authors: | Henrik Nordman Thomas Borén Julia R Davies Lars Engstrand Ingemar Carlstedt |
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Institution: | Mucosal Biology Group, CMB, Lund University, Sweden. |
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Abstract: | A microtiter-based assay was developed to study the binding of Helicobacter pylori to pig gastric mucins purified by density-gradient centrifugation in CsCl/4 M guanidinium chloride. Binding of H. pylori was observed over the 'mucin' band as well as with 'low-density' components in the gradients, and binding to the latter was more pronounced when incubations were performed at 37 degrees C as compared to 20 degrees C. At a lower pH, binding of H. pylori (strain SVA 40) to the 'high-density' mucins from pig antrum was increased but binding to the 'low-density' ones was decreased. Binding of the P466 strain (Le(b)-specific) was mainly associated with the 'mucin' band, whereas the MO19 strain reacted preferentially with the 'low-density' components. In summary, H. pylori may bind to gastric mucins and the binding is influenced by temperature, pH and the repertoire of bacterial adhesins. |
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Keywords: | Helicobacter pylori Gastric mucin Pig |
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