Cited by 110Bacterial biofilms and quorum sensingPneumonia and Respiratory InfectionsMicrobial infections and disease research

Dynamic changes in the Streptococcus pneumoniae transcriptome during transition from biofilm formation to invasive disease upon influenza A virus infection

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Pettigrew, Melinda M., Marks, Laura R., Kong, Yong, Gent, Janneane F., Roche-Hakansson, Hazeline, Hakansson, Anders P.·2014·Infection and Immunity

Abstract

Streptococcus pneumoniae is a leading cause of infectious disease globally. Nasopharyngeal colonization occurs in biofilms and precedes infection. Prior studies have indicated that biofilm-derived pneumococci are avirulent. However, influenza A virus (IAV) infection releases virulent pneumococci from biofilms in vitro and in vivo. Triggers of dispersal include IAV-induced changes in the nasopharynx, such as increased temperature (fever) and extracellular ATP (tissue damage). We used whole-transcriptome shotgun sequencing (RNA-seq) to compare the S. pneumoniae transcriptome in biofilms, bacteria dispersed from biofilms after exposure to IAV, febrile-range temperature, or ATP, and planktonic cells grown at 37°C. Compared with biofilm bacteria, actively dispersed S. pneumoniae, which were more virulent in invasive disease, upregulated genes involved in carbohydrate metabolism. Enzymatic assays for ATP and lactate production confirmed that dispersed pneumococci exhibited increased metabolism compared to those in biofilms. Dispersed pneumococci also upregulated genes associated with production of bacteriocins and downregulated colonization-associated genes related to competence, fratricide, and the transparent colony phenotype. IAV had the largest impact on the pneumococcal transcriptome. Similar transcriptional differences were also observed when actively dispersed bacteria were compared with avirulent planktonic bacteria. Our data demonstrate complex changes in the pneumococcal transcriptome in response to IAV-induced changes in the environment. Our data suggest that disease is caused by pneumococci that are primed to move to tissue sites with altered nutrient availability and to protect themselves from the nasopharyngeal microflora and host immune response. These data help explain pneumococcal virulence after IAV infection and have important implications for studies of S. pneumoniae pathogenesis.

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Crossref · 10.1128/iai.02225-14

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Authors
Pettigrew, M. M., Marks, L. R., Kong, Y., Gent, J. F., Roche-Hakansson, H., & Hakansson, A. P.
Affiliations
  • Yale University (US)
  • University at Buffalo, State University of New York (US)
  • W. M. Keck Foundation (US)
  • Department of Microbiology and Immunology, University at Buffalo, State University of New York, Buffalo, New York, USA
Venue
Infection and Immunity
Published
2014-11
Volume
82
Issue
11
Pages
4607-4619
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2317658790
Cited by
110
References
85
Citations by year
2026: 3 · 2025: 9 · 2024: 6 · 2023: 8 · 2022: 12 · 2021: 14 · 2020: 11 · 2019: 9 · 2018: 11 · 2017: 8 · 2016: 10 · 2015: 7 · 2014: 2
FWCI
3.69
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • National Institutes of Health (UL1TR000142)
  • National Institute on Deafness and Other Communication Disorders (R21DC011667, R01DC013554)
  • National Institute of General Medical Sciences (T32GM099607)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
  • Health Sciences › Medicine › Epidemiology › Pneumonia and Respiratory Infections
  • Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
Keywords
Streptococcus pneumoniae, biofilm dispersal, influenza A virus, pneumococcal virulence, transcriptome, invasive pneumococcal disease, nasopharyngeal carriage, extracellular ATP, fever, carbohydrate metabolism, bacteriocins, competence, fratricide, bacterioplankton, host-pathogen interaction
MeSH terms
Animals, Epithelial Cells, Humans, Mice, Inbred BALB C, Orthomyxoviridae Infections, Influenza A virus, Pneumococcal Infections, Streptococcus pneumoniae, Biofilms, Sepsis, Reverse Transcriptase Polymerase Chain Reaction, Cell Line, Tumor, Mice

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