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| Status |
Public on Jul 17, 2023 |
| Title |
Identifying genetic determinants of Streptococcus pyogenes-host interactions in a murine intact skin infection model |
| Organisms |
Mus musculus; Streptococcus pyogenes NZ131 |
| Experiment type |
Expression profiling by high throughput sequencing
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| Summary |
Streptococcus pyogenes is an obligate human pathobiont associated with many disease states. Here, we present a novel model of S. pyogenes infection using intact murine epithelium. From this model, we were able to perform RNA sequencing to evaluate the genetic changes undertaken by both the bacterium and host at 5 and 24 hours post infection. Analysis of these genomic data demonstrate that S. pyogenes undergoes significant genetic adaptation to successfully infect the murine epithelium, including changes to metabolism and activation of the Rgg2/Rgg3 quorum sensing (QS) system. Subsequent experiments demonstrate that an intact Rgg2/Rgg3 QS cascade is necessary to establish a stable superficial skin infection. Furthermore, activation of this pathway results in increased murine morbidity and increased bacterial burden on the skin. This phenotype is associated with gross changes to the murine skin, as well as histopathological evidence of inflammation. Taken together, these experiments offer a novel method to investigate S. pyogenes-epithelial interactions and demonstrate that a well-studied QS pathway is critical to a persistent infection.
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| Overall design |
To investigate gene expression assoicated with infection of intact murine skin by Streptococcus pyogenes, we obtained RNA from both mice and bacterium at 5 and 24 hours after infection. Dual RNAsequencing allowed for comparison of bacterial samples to their input control, as well as murine samples versus their uninfected control.
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| Web link |
https://pubmed.ncbi.nlm.nih.gov/37889753/
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| Contributor(s) |
Wilkening RV, Langouët-Astrié C, Severn MM, Federle MJ, Horswill AR |
| Citation(s) |
37889753 |
| |
| Submission date |
Jul 10, 2023 |
| Last update date |
Nov 08, 2023 |
| Contact name |
Reid V Wilkening |
| E-mail(s) |
[email protected]
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| Organization name |
University of Colorado
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| Department |
Department of Pediatrics, Section of Critical Care Medicine
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| Lab |
Horswill Laboratory
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| Street address |
12800 E. 19th Ave., Rm. P18-9101
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| City |
Aurora |
| State/province |
CO |
| ZIP/Postal code |
80045 |
| Country |
USA |
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| Platforms (3) |
| GPL13112 |
Illumina HiSeq 2000 (Mus musculus) |
| GPL33561 |
Illumina HiSeq 2000 (Streptococcus pyogenes NZ131) |
| GPL33562 |
Illumina HiSeq 2000 (Mus musculus; Streptococcus pyogenes NZ131) |
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| Samples (11)
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| Relations |
| BioProject |
PRJNA993365 |
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