Campylobacter pyloridis degrades mucin and undermines gastric mucosal integrity

B. L. Slomiany, J. Bilski, J. Sarosiek, V. L.N. Murty, B. Dworkin, K. VanHorn, J. Zielenski, A. Slomiany

Research output: Contribution to journalArticlepeer-review

144 Scopus citations

Abstract

The role of Campylobacter pyloridis, a spiral bacteria associated with gastritis and peptic ulcers in weakening the mucus component of gastric mucosal barrier was investigated. The colonies of bacteria, cultured from antral mucosal biopsies of patients undergoing gastroscopy, were washed with saline, passed through sterilization filter and the filtrate was examined for protease and glycosylhydrolase activities. The obtained results revealed that the filtrate exhibited a strong proteolytic activity not only towards the typical protein substrates such as albumin but also towards gastric mucin. Optimum enzymatic activity for degradation of mucin was attained at pH 7.0 and the protease activity was found in a low m.w. (<50K) protein fraction. The filtrate showed little glycosylhydrolase activity and did not cause the hydrolysis of mucin carbohydrates. The data suggest that C pyloridis infection weakens the gastric mucosal defense by causing proteolytic degradation of mucin component of the protective mucus layer.

Original languageEnglish
Pages (from-to)307-314
Number of pages8
JournalBiochemical and Biophysical Research Communications
Volume144
Issue number1
DOIs
StatePublished - Apr 14 1987

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