Cited by 51Burkholderia infections and melioidosisBacterial biofilms and quorum sensingBacillus and Francisella bacterial research

Temperature-Regulated Microcolony Formation by Burkholderia pseudomallei Requires pilA and Enhances Association with Cultured Human Cells

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Boddey, Justin A., Flegg, Cameron P., Day, Chris J., Beacham, Ifor R., Peak, Ian R.·2006·Infection and Immunity

Abstract

Burkholderia pseudomallei is the causative agent of melioidosis, a potentially fatal disease that is endemic to Northern Australia and Southeast Asia and is acquired from soil or water. Adherence of B. pseudomallei 08 to cultured cells increases dramatically following prior growth at 30 degrees C or less compared to that following prior growth at 37 degrees C. Here, we show that this occurs almost entirely as the result of microcolony formation (bacterium-bacterium interactions) following growth at 27 degrees C but not at 37 degrees C, which considerably enhances bacterial association with eukaryotic cells. Further, we demonstrate that the type IVA pilin-encoding gene, pilA, is essential for microcolony development by B. pseudomallei 08, and thus optimum association with eukaryotic cells, but is not required for direct adherence (bacterium-cell interactions). In contrast, although the B. pseudomallei genome sequence strain, K96243, also contains transcriptionally active pilA, microcolony formation rarely occurs following growth at either 27 degrees C or 37 degrees C and cell association occurs significantly less than with strain 08. Analysis of pilA transcription in 08 identified that pilA is dramatically upregulated under microcolony-forming conditions, viz., growth at low temperature, and association with eukaryotic cells; the pattern of transcription of pilA in K96243 differed from that in 08. Our study also suggests that biofilm formation by B. pseudomallei 08 and K96243 on polyvinylchloride is not mediated by pilA. Adherence and microcolony formation, and pilA transcription, vary between strains, consistent with known genomic variation in B. pseudomallei, and these phenotypes may be relevant to colonization from the environment.

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Crossref · 10.1128/iai.00569-06

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  • Microcolony and biofilm formation are two separate processes.

    “Thus, microcolony and biofilm formation are two separate processes [27].”

    From Bacterial autoaggregation (2018) · cites this paper as [27]

  • In Burkholderia pseudomallei, microcolony formation is mediated by type IV pili in a temperature-regulated manner; in some strains type IV pili are not needed for biofilm development, and in some conditions the lack of type IV pili can increase biofilm formation.

    “Another example is Burkholderia pseudomallei, where microcolony formation is mediated by type IV pili in a temperature-regulated manner [27]. However, in some B. pseudomallei strains, type IV pili are not needed for biofilm development, and in some conditions the lack of type IV pili can increase biofilm formation.”

    From Bacterial autoaggregation (2018) · cites this paper as [27]

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Authors
Boddey, J. A., Flegg, C. P., Day, C. J., Beacham, I. R., & Peak, I. R.
Affiliations
  • Institute for Glycomics
  • School of Medical Science, Griffith University, Gold Coast, Queensland, Australia
  • Griffith University (AU)
Corresponding author
Beacham, Ifor R.
Venue
Infection and Immunity
Published
2006-09
Volume
74
Issue
9
Pages
5374-5381
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2169327644
Cited by
51
References
51
Citations by year
2026: 2 · 2025: 1 · 2023: 1 · 2022: 3 · 2021: 8 · 2020: 3 · 2019: 1 · 2018: 2 · 2016: 1 · 2015: 2 · 2014: 3 · 2013: 4 · 2012: 3
FWCI
2.21
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Griffith Research Online (submittedVersion)
Funders
  • Medical Research Council
  • National Health and Medical Research Council
Topics
  • Health Sciences › Medicine › Epidemiology › Burkholderia infections and melioidosis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacillus and Francisella bacterial research
Keywords
Burkholderia pseudomallei, melioidosis, microcolony formation, Pila, bacterial adhesion, low-temperature growth, biofilm formation, strain differences, bacterial colonization
MeSH terms
Bacterial Adhesion, Cells, Cultured, Humans, Polyvinyl Chloride, Temperature, Transcription, Genetic, Genetic Variation, Gene Expression Regulation, Bacterial, Burkholderia pseudomallei, Biofilms, Fimbriae Proteins

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