Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>

ABSTRACT The Gram-negative bacterium Pseudomonas aeruginosa is a common cause of chronic airway infections in individuals with the heritable disease cystic fibrosis (CF). After prolonged colonization of the CF lung, P. aeruginosa becomes highly resistant to host clearance and antibiotic treatment; t...

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Autores principales:	Holly K. Huse, Taejoon Kwon, James E. A. Zlosnik, David P. Speert, Edward M. Marcotte, Marvin Whiteley
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Lenguaje:	EN
Publicado:	American Society for Microbiology 2010
Materias:	Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/84685850081246918e3c27a19af32b50
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spelling	oai:doaj.org-article:84685850081246918e3c27a19af32b502021-11-15T15:38:15ZParallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>10.1128/mBio.00199-102150-7511https://doaj.org/article/84685850081246918e3c27a19af32b502010-10-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mBio.00199-10https://doaj.org/toc/2150-7511ABSTRACT The Gram-negative bacterium Pseudomonas aeruginosa is a common cause of chronic airway infections in individuals with the heritable disease cystic fibrosis (CF). After prolonged colonization of the CF lung, P. aeruginosa becomes highly resistant to host clearance and antibiotic treatment; therefore, understanding how this bacterium evolves during chronic infection is important for identifying beneficial adaptations that could be targeted therapeutically. To identify potential adaptive traits of P. aeruginosa during chronic infection, we carried out global transcriptomic profiling of chronological clonal isolates obtained from 3 individuals with CF. Isolates were collected sequentially over periods ranging from 3 months to 8 years, representing up to 39,000 in vivo generations. We identified 24 genes that were commonly regulated by all 3 P. aeruginosa lineages, including several genes encoding traits previously shown to be important for in vivo growth. Our results reveal that parallel evolution occurs in the CF lung and that at least a proportion of the traits identified are beneficial for P. aeruginosa chronic colonization of the CF lung. IMPORTANCE Deadly diseases like AIDS, malaria, and tuberculosis are the result of long-term chronic infections. Pathogens that cause chronic infections adapt to the host environment, avoiding the immune response and resisting antimicrobial agents. Studies of pathogen adaptation are therefore important for understanding how the efficacy of current therapeutics may change upon prolonged infection. One notorious chronic pathogen is Pseudomonas aeruginosa, a bacterium that causes long-term infections in individuals with the heritable disease cystic fibrosis (CF). We used gene expression profiles to identify 24 genes that commonly changed expression over time in 3 P. aeruginosa lineages, indicating that these changes occur in parallel in the lungs of individuals with CF. Several of these genes have previously been shown to encode traits critical for in vivo-relevant processes, suggesting that they are likely beneficial adaptations important for chronic colonization of the CF lung.Holly K. HuseTaejoon KwonJames E. A. ZlosnikDavid P. SpeertEdward M. MarcotteMarvin WhiteleyAmerican Society for MicrobiologyarticleMicrobiologyQR1-502ENmBio, Vol 1, Iss 4 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microbiology QR1-502
spellingShingle	Microbiology QR1-502 Holly K. Huse Taejoon Kwon James E. A. Zlosnik David P. Speert Edward M. Marcotte Marvin Whiteley Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>
description	ABSTRACT The Gram-negative bacterium Pseudomonas aeruginosa is a common cause of chronic airway infections in individuals with the heritable disease cystic fibrosis (CF). After prolonged colonization of the CF lung, P. aeruginosa becomes highly resistant to host clearance and antibiotic treatment; therefore, understanding how this bacterium evolves during chronic infection is important for identifying beneficial adaptations that could be targeted therapeutically. To identify potential adaptive traits of P. aeruginosa during chronic infection, we carried out global transcriptomic profiling of chronological clonal isolates obtained from 3 individuals with CF. Isolates were collected sequentially over periods ranging from 3 months to 8 years, representing up to 39,000 in vivo generations. We identified 24 genes that were commonly regulated by all 3 P. aeruginosa lineages, including several genes encoding traits previously shown to be important for in vivo growth. Our results reveal that parallel evolution occurs in the CF lung and that at least a proportion of the traits identified are beneficial for P. aeruginosa chronic colonization of the CF lung. IMPORTANCE Deadly diseases like AIDS, malaria, and tuberculosis are the result of long-term chronic infections. Pathogens that cause chronic infections adapt to the host environment, avoiding the immune response and resisting antimicrobial agents. Studies of pathogen adaptation are therefore important for understanding how the efficacy of current therapeutics may change upon prolonged infection. One notorious chronic pathogen is Pseudomonas aeruginosa, a bacterium that causes long-term infections in individuals with the heritable disease cystic fibrosis (CF). We used gene expression profiles to identify 24 genes that commonly changed expression over time in 3 P. aeruginosa lineages, indicating that these changes occur in parallel in the lungs of individuals with CF. Several of these genes have previously been shown to encode traits critical for in vivo-relevant processes, suggesting that they are likely beneficial adaptations important for chronic colonization of the CF lung.
format	article
author	Holly K. Huse Taejoon Kwon James E. A. Zlosnik David P. Speert Edward M. Marcotte Marvin Whiteley
author_facet	Holly K. Huse Taejoon Kwon James E. A. Zlosnik David P. Speert Edward M. Marcotte Marvin Whiteley
author_sort	Holly K. Huse
title	Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>
title_short	Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>
title_full	Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>
title_fullStr	Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>
title_full_unstemmed	Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>
title_sort	parallel evolution in <named-content content-type="genus-species">pseudomonas aeruginosa</named-content> over 39,000 generations <italic toggle="yes">in vivo</italic>
publisher	American Society for Microbiology
publishDate	2010
url	https://doaj.org/article/84685850081246918e3c27a19af32b50
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Parallel Evolution in <named-content content-type="genus-species">Pseudomonas aeruginosa</named-content> over 39,000 Generations <italic toggle="yes">In Vivo</italic>

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