Cited by 274Escherichia coli research studiesProbiotics and Fermented FoodsBacterial Genetics and Biotechnology

Surface-layer protein extracts from Lactobacillus helveticus inhibit enterohaemorrhagic Escherichia coli O157:H7 adhesion to epithelial cells

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Johnson-Henry, Kathene C., Hagen, Karen E., Gordonpour, Mahsa, Tompkins, Thomas A., Sherman, Philip M.·2007·Cellular Microbiology

Abstract

Adherence of intestinal pathogens, including Escherichia coli O157:H7, to human intestinal epithelial cells is a key step in pathogenesis. Probiotic bacteria, including Lactobacillus helveticus R0052 inhibit the adhesion of E. coli O157:H7 to epithelial cells, a process which may be related to specific components of the bacterial surface. Surface-layer proteins (Slps) are located in a paracrystalline layer outside the bacterial cell wall and are thought to play a role in tissue adherence. However, the ability of S-layer protein extract derived from probiotic bacteria to block adherence of enteric pathogens has not been investigated. Human epithelial (HEp-2 and T84) cells were treated with S-layer protein extract alone, infected with E. coli O157:H7, or pretreated with S-layer protein extract prior to infection to determine their importance in the inhibition of pathogen adherence. The effects of S-layer protein extracts were characterized by phase-contrast and immunofluorescence microscopy and measurement of the transepithelial electrical resistance of polarized monolayers. Pre-treatment of host epithelial cells with S-layer protein extracts prior to E. coli O157:H7 infection decreased pathogen adherence and attaching-effacing lesions in addition to preserving the barrier function of monolayers. These in vitro studies indicate that a non-viable constituent derived from a probiotic strain may prove effective in interrupting the infectious process of an intestinal pathogen.

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Crossref · 10.1111/j.1462-5822.2006.00791.x

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  • The S-layer protein extract of L. helveticus R0052 has been shown to ameliorate the pathogenesis of E coli O157:H7.

    “The S-layer protein extract of L. helveticus R0052 has been shown to ameliorate the pathogenesis of E coli O157:H7 (Sherman et al., 2005; Johnson-Henry et al., 2007).”

    From Lactobacillus helveticus: the proteolytic system (2013) · cites this paper as Johnson-Henry et al., 2007

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Authors
Johnson-Henry, K. C., Hagen, K. E., Gordonpour, M., Tompkins, T. A., & Sherman, P. M.
Affiliations
  • Lallemand (Canada) (CA)
  • University of Toronto (CA)
Corresponding author
Sherman, Philip M.
Venue
Cellular Microbiology
Published
2007-02
Volume
9
Issue
2
Pages
356-367
ISSN
  • 1462-5814 (ISSN-L)
  • 1462-5822
OpenAlex
W2151081251
Cited by
274
References
55
Citations by year
2026: 4 · 2025: 11 · 2024: 4 · 2023: 15 · 2022: 19 · 2021: 11 · 2020: 19 · 2019: 14 · 2018: 15 · 2017: 14 · 2016: 15 · 2015: 17 · 2014: 10 · 2013: 17 · 2012: 25
FWCI
5.94
Type
journal article
Language
en
Open access
Locations
  • Cellular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Guelph
  • Canada Research Chairs
  • University of Toronto
  • Hospital for Sick Children
  • Canadian Institutes of Health Research
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Escherichia coli research studies
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
Keywords
Lactobacillus helveticus, Escherichia coli O157:H7, surface layer protein, probiotics, bacterial adhesion inhibition, intestinal epithelial cells, attaching and effacing lesions, epithelial barrier function, transepithelial electrical resistance
MeSH terms
Bacterial Adhesion, Bacterial Outer Membrane Proteins, Bacterial Proteins, Cell Line, Epithelial Cells, Escherichia coli O157, Lactobacillus helveticus

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