Cited by 380Escherichia coli research studiesBacterial Genetics and BiotechnologyGut microbiota and health

Comparison of Carbon Nutrition for Pathogenic and Commensal Escherichia coli Strains in the Mouse Intestine

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Fabich, Andrew J., Jones, Shari A., Chowdhury, Fatema Z., Cernosek, Amanda, Anderson, April, Smalley, Darren, McHargue, J. Wesley, Hightower, G. Aaron +8 more·2008·Infection and Immunity

Abstract

The carbon sources that support the growth of pathogenic Escherichia coli O157:H7 in the mammalian intestine have not previously been investigated. In vivo, the pathogenic E. coli EDL933 grows primarily as single cells dispersed within the mucus layer that overlies the mouse cecal epithelium. We therefore compared the pathogenic strain and the commensal E. coli strain MG1655 modes of metabolism in vitro, using a mixture of the sugars known to be present in cecal mucus, and found that the two strains used the 13 sugars in a similar order and cometabolized as many as 9 sugars at a time. We conducted systematic mutation analyses of E. coli EDL933 and E. coli MG1655 by using lesions in the pathways used for catabolism of 13 mucus-derived sugars and five other compounds for which the corresponding bacterial gene system was induced in the transcriptome of cells grown on cecal mucus. Each of 18 catabolic mutants in both bacterial genetic backgrounds was fed to streptomycin-treated mice, together with the respective wild-type parent strain, and their colonization was monitored by fecal plate counts. None of the mutations corresponding to the five compounds not found in mucosal polysaccharides resulted in colonization defects. Based on the mutations that caused colonization defects, we determined that both E. coli EDL933 and E. coli MG1655 used arabinose, fucose, and N -acetylglucosamine in the intestine. In addition, E. coli EDL933 used galactose, hexuronates, mannose, and ribose, whereas E. coli MG1655 used gluconate and N -acetylneuraminic acid. The colonization defects of six catabolic lesions were found to be additive with E. coli EDL933 but not with E. coli MG1655. The data indicate that pathogenic E. coli EDL933 uses sugars that are not used by commensal E. coli MG1655 to colonize the mouse intestine. The results suggest a strategy whereby invading pathogens gain advantage by simultaneously consuming several sugars that may be available because they are not consumed by the commensal intestinal microbiota.

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  1. [2]Autieri, S. M., J. J. Lins, M. P. Leatham, D. C. Laux, T. Conway, and P. S. Cohen. 2007. l-Fucose stimulates utilization of d-ribose by Escherichia coli MG1655 ΔfucAO and E. coli Nissle 1917 ΔfucAO mutants in the mouse intestine and in M9 minimal medium. Infect. Immun. 755465-5475. [DOI] [PMC free article] [PubMed] [Google Scholar]
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Authors
Fabich, A. J., Jones, S. A., Chowdhury, F. Z., Cernosek, A., Anderson, A., Smalley, D., McHargue, J. W., Hightower, G. A., Smith, J. T., Autieri, S. M., Leatham, M. P., Lins, J. J., Allen, R. L., Laux, D. C., Cohen, P. S., & Conway, T.
Affiliations
  • University of Oklahoma (US)
  • Southeastern Oklahoma State University (US)
  • University of Rhode Island (US)
Corresponding author
Conway, Tyrrell
Venue
Infection and Immunity
Published
2008-03
Volume
76
Issue
3
Pages
1143-1152
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2096666146
Cited by
380
References
55
Citations by year
2026: 15 · 2025: 18 · 2024: 25 · 2023: 18 · 2022: 28 · 2021: 25 · 2020: 31 · 2019: 29 · 2018: 24 · 2017: 21 · 2016: 21 · 2015: 30 · 2014: 21 · 2013: 21 · 2012: 9
FWCI
9.07
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Journal of Media Literacy Education (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (R56AI048945, R01AI048945, AI48945)
  • National Center for Research Resources (P20RR016478)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Escherichia coli research studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
Escherichia coli O157:H7, commensal Escherichia coli, carbon source utilization, bacterial colonization, arabinose, fucose, N-acetylglucosamine, N-acetylneuraminic acid, mouse intestine, virulence
MeSH terms
Animals, Escherichia coli, Escherichia coli Infections, Feces, Intestines, Male, Colony Count, Microbial, Gene Deletion, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Carbohydrate Metabolism, Mice, Metabolic Networks and Pathways

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