| Effect of Lactobacillus fermentum on beta2 toxin production by Clostridium perfringens. | |
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MedLine Citation:
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PMID: 21602389 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Clostridium perfringens, although a member of the normal gut flora, is also an important cause of intestinal disease in animals and, to a lesser extent, in humans. Disease is associated with the production of one or more toxins, and little is known about environmental influences on the production of these toxins. One of the health-promoting effects of lactic acid bacteria (LAB) is the establishment and maintenance of a low pH in the intestine since an acidic environment inhibits the growth of many potentially harmful bacteria. Here, the effect of the LAB Lactobacillus fermentum on beta2 toxin production by C. perfringens is described. Coculturing of C. perfringens with L. fermentum showed that under in vitro conditions, L. fermentum was capable of silencing beta2 toxin production by C. perfringens without influencing bacterial viability. The reduction in toxin production was shown to be most likely a result of the decline in pH. Quantitative PCR showed that the reduction in beta2 toxin production was due to a decrease in cpb2 mRNA. These results suggest that in the intestine, the production of beta2 toxin by C. perfringens might be regulated by other members of the normal intestinal flora. |
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Authors:
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Janneke G Allaart; Alphons J A M van Asten; Johannes C M Vernooij; Andrea Gröne |
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Publication Detail:
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Type: Journal Article Date: 2011-05-20 |
Journal Detail:
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Title: Applied and environmental microbiology Volume: 77 ISSN: 1098-5336 ISO Abbreviation: Appl. Environ. Microbiol. Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-24 Completed Date: 2011-10-12 Revised Date: 2012-01-02 |
Medline Journal Info:
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Nlm Unique ID: 7605801 Medline TA: Appl Environ Microbiol Country: United States |
Other Details:
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Languages: eng Pagination: 4406-11 Citation Subset: IM |
Affiliation:
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Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, P.O. Box 80.158, 3508TD Utrecht, The Netherlands. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bacterial Toxins / antagonists & inhibitors*, biosynthesis* Carboxylic Acids / metabolism Clostridium perfringens / growth & development*, metabolism* Gene Expression / drug effects Gene Expression Profiling Humans Hydrogen-Ion Concentration Lactobacillus fermentum / growth & development* Microbial Interactions* Microbial Viability |
| Chemical | |
Reg. No./Substance:
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0/Bacterial Toxins; 0/Carboxylic Acids; 0/cpb2 protein, Clostridium perfringens |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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