摘要
AIM: To observe competitive inhibition of adherence of enterotoxigenic Escherichia coli (ETEC), enteropathogenic Escherichia coli (EPEC) and Clostridium difficile ( C. difficile) to intestinal epithelial cell line Lovo by purified adhesin of Bifidobacterium adolescentis 1027 (B. ado 1027). METHODS: The binding of bacteria to intestinal epithelial cell line Lovo was counted by adhesion assay. The inhibition of adherence of ETEC, EPEC and C. difficile to intestinal epithelial cell line Lovo by purified adhesin of B. ado 1027 was evaluated quantitatively by flow cytometry. RESULTS: The purified adhesin at the concentration of 10 IJg/mL, 20 IJg/mL and 30 IJg/mL except at 1 IJg/mL and 5 IJg/mL could inhibit significantly the adhesion of ETEC, EPEC and C. difficile to intestinal epithelial cell line Lovo. Moreover, we observed that a reduction in bacterial adhesion was occurred with increase in the concentration of adhesin, and MFI (Mean fluorescent intensity) was decreased with increase in the concentration of adhesin. CONCLUSION: The purified adhesin of B. ado 1027 can inhibit the adhesion of ETEC, EPEC and C. difficile to intestinal epithelial cell line Lovo in a dose-dependent manner.
AIM: To observe competitive inhibition of adherence of enterotoxigenic Escherichia coli (ETEC),enteropathogenic Escherichia coli (EPEC) and Clostridium difficile ( C.difficile) to intestinal epithelial cell line Lovo by purified adhesin of Bifidobacterium adolescentis 1027 (B.ado 1027). METHODS: The binding of bacteria to intestinal epithelial cell line Lovo was counted by adhesion assay.The inhibition of adherence of ETEC,EPEC and C.difficile to intestinal epithelial cell line Lovo by purified adhesin of B.ado 1027 was evaluated quantitatively by flow cytometry. RESULTS: The purified adhesin at the concentration of 10 μg/mL,20 μg/mL and 30 μg/mL except at 1 μg/ml and 5 μg/ml could inhibit significantly the adhesion of ETEC, EPEC and C.difficile to intestinal epithelial cell line Lovo. Moreover,we observed that a reduction in bacterial adhesion was occurred with increase in the concentration of adhesin, and MFI (Mean fluorescent intensity) was decreased with increase in the concentration of adhesin. CONCLUSION: The purified adhesin of B.ado 1027 can inhibit the adhesion of ETEC,EPEC and C.difficile to intestinal epithelial cell line Lovo in a dose-dependent manner.
基金
Supported by Natural Science Foundation of Guangdong Province,No.010621
