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Pneumococcal intera...
Pneumococcal interactions with epithelial cells are crucial for optimal biofilm formation and colonization in vitro and in vivo
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- Marks, Laura R (author)
- The State University of New York
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- Parameswaran, G Iyer (author)
- The State University of New York
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- Hakansson, Anders P (author)
- Lund University,Lunds universitet,Experimentell infektionsmedicin, Malmö,Forskargrupper vid Lunds universitet,Experimental Infection Medicine, Malmö,Lund University Research Groups
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(creator_code:org_t)
- 2012
- 2012
- English 17 s.
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In: Infection and Immunity. - 1098-5522. ; 80:8, s. 60-2744
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Abstract
Subject headings
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- The human nasopharynx is the main reservoir for Streptococcus pneumoniae (the pneumococcus) and the source for both horizontal spread and transition to infection. Some clinical evidence indicates that nasopharyngeal carriage is harder to eradicate with antibiotics than is pneumococcal invasive disease, which may suggest that colonizing pneumococci exist in biofilm communities that are more resistant to antibiotics. While pneumococcal biofilms have been observed during symptomatic infection, their role in colonization and the role of host factors in this process have been less studied. Here, we show for the first time that pneumococci form highly structured biofilm communities during colonization of the murine nasopharynx that display increased antibiotic resistance. Furthermore, pneumococcal biofilms grown on respiratory epithelial cells exhibited phenotypes similar to those observed during colonization in vivo, whereas abiotic surfaces produced less ordered and more antibiotic-sensitive biofilms. The importance of bacterial-epithelial cell interactions during biofilm formation was shown using both clinical strains with variable colonization efficacies and pneumococcal mutants with impaired colonization characteristics in vivo. In both cases, the ability of strains to form biofilms on epithelial cells directly correlated with their ability to colonize the nasopharynx in vivo, with colonization-deficient strains forming less structured and more antibiotic-sensitive biofilms on epithelial cells, an association that was lost when grown on abiotic surfaces. Thus, these studies emphasize the importance of host-bacterial interactions in pneumococcal biofilm formation and provide the first experimental data to explain the high resistance of pneumococcal colonization to eradication by antibiotics.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Infektionsmedicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Infectious Medicine (hsv//eng)
Keyword
- Animals
- Anti-Bacterial Agents
- Bacterial Adhesion
- Biofilms
- Biomass
- Carrier State
- Cell Line, Tumor
- Cells, Cultured
- Drug Resistance, Bacterial
- Epithelial Cells
- Female
- Humans
- Mice
- Mice, Inbred BALB C
- Microscopy, Electron, Scanning
- Nasopharynx
- Pneumococcal Infections
- Respiratory Mucosa
- Streptococcus pneumoniae
Publication and Content Type
- art (subject category)
- ref (subject category)
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