Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis.
Pseudomonas aeruginosa, is an opportunistic, bacterial pathogen causing persistent and frequently fatal infections of the lung in patients with cystic fibrosis. Isolates from chronic infections differ from laboratory and environmental strains in a range of traits and this is widely interpreted as th...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24454693/?tool=EBI |
| _version_ | 1818426210254848000 |
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| author | Natalie Jiricny Søren Molin Kevin Foster Stephen P Diggle Pauline D Scanlan Melanie Ghoul Helle Krogh Johansen Lorenzo A Santorelli Roman Popat Stuart A West Ashleigh S Griffin |
| author_facet | Natalie Jiricny Søren Molin Kevin Foster Stephen P Diggle Pauline D Scanlan Melanie Ghoul Helle Krogh Johansen Lorenzo A Santorelli Roman Popat Stuart A West Ashleigh S Griffin |
| author_sort | Natalie Jiricny |
| collection | DOAJ |
| description | Pseudomonas aeruginosa, is an opportunistic, bacterial pathogen causing persistent and frequently fatal infections of the lung in patients with cystic fibrosis. Isolates from chronic infections differ from laboratory and environmental strains in a range of traits and this is widely interpreted as the result of adaptation to the lung environment. Typically, chronic strains carry mutations in global regulation factors that could effect reduced expression of social traits, raising the possibility that competitive dynamics between cooperative and selfish, cheating strains could also drive changes in P. aeruginosa infections. We compared the expression of cooperative traits - biofilm formation, secretion of exo-products and quorum sensing (QS) - in P. aeruginosa isolates that were estimated to have spent different lengths of time in the lung based on clinical information. All three exo-products involved in nutrient acquisition were produced in significantly smaller quantities with increased duration of infection, and patterns across four QS signal molecules were consistent with accumulation over time of mutations in lasR, which are known to disrupt the ability of cells to respond to QS signal. Pyocyanin production, and the proportion of cells in biofilm relative to motile, free-living cells in liquid culture, did not change. Overall, our results confirm that the loss of social behaviour is a consistent trend with time spent in the lung and suggest that social dynamics are potentially relevant to understanding the behaviour of P. aeruginosa in lung infections. |
| first_indexed | 2024-12-14T14:26:12Z |
| format | Article |
| id | doaj.art-f91f498b41cd4b4c9bb09218f2299442 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-14T14:26:12Z |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-f91f498b41cd4b4c9bb09218f22994422022-12-21T22:57:56ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0191e8312410.1371/journal.pone.0083124Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis.Natalie JiricnySøren MolinKevin FosterStephen P DigglePauline D ScanlanMelanie GhoulHelle Krogh JohansenLorenzo A SantorelliRoman PopatStuart A WestAshleigh S GriffinPseudomonas aeruginosa, is an opportunistic, bacterial pathogen causing persistent and frequently fatal infections of the lung in patients with cystic fibrosis. Isolates from chronic infections differ from laboratory and environmental strains in a range of traits and this is widely interpreted as the result of adaptation to the lung environment. Typically, chronic strains carry mutations in global regulation factors that could effect reduced expression of social traits, raising the possibility that competitive dynamics between cooperative and selfish, cheating strains could also drive changes in P. aeruginosa infections. We compared the expression of cooperative traits - biofilm formation, secretion of exo-products and quorum sensing (QS) - in P. aeruginosa isolates that were estimated to have spent different lengths of time in the lung based on clinical information. All three exo-products involved in nutrient acquisition were produced in significantly smaller quantities with increased duration of infection, and patterns across four QS signal molecules were consistent with accumulation over time of mutations in lasR, which are known to disrupt the ability of cells to respond to QS signal. Pyocyanin production, and the proportion of cells in biofilm relative to motile, free-living cells in liquid culture, did not change. Overall, our results confirm that the loss of social behaviour is a consistent trend with time spent in the lung and suggest that social dynamics are potentially relevant to understanding the behaviour of P. aeruginosa in lung infections.https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24454693/?tool=EBI |
| spellingShingle | Natalie Jiricny Søren Molin Kevin Foster Stephen P Diggle Pauline D Scanlan Melanie Ghoul Helle Krogh Johansen Lorenzo A Santorelli Roman Popat Stuart A West Ashleigh S Griffin Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis. PLoS ONE |
| title | Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis. |
| title_full | Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis. |
| title_fullStr | Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis. |
| title_full_unstemmed | Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis. |
| title_short | Loss of social behaviours in populations of Pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis. |
| title_sort | loss of social behaviours in populations of pseudomonas aeruginosa infecting lungs of patients with cystic fibrosis |
| url | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24454693/?tool=EBI |
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