|
| Status |
Public on Feb 06, 2018 |
| Title |
A vaginal tract signal detected by the GBS SaeRS system elicits transcriptomic changes and enhances murine colonization. |
| Organism |
Streptococcus agalactiae A909 |
| Experiment type |
Expression profiling by high throughput sequencing
|
| Summary |
Streptococcus agalactiae (Group B Streptococcus, GBS) can colonize the human vaginal tract leading to both superficial and serious infections in adults and neonates. To study bacterial colonization of the reproductive tract in a mammalian system, we employed a murine vaginal carriage model. Using RNASeq, the transcriptome of GBS growing in vivo during vaginal carriage was determined. Over one-quarter of the genes in GBS were found to be differentially regulated during in vivo colonization as compared to laboratory cultures. A two-component system (TCS) homologous to the staphylococcal virulence regulator SaeRS was identified as being up-regulated in vivo. One of the SaeRS targets, pbsP, a proposed GBS vaccine candidate, was shown to be important for colonization of the vaginal tract. A component of vaginal lavage fluid acted as a signal to turn on pbsP expression via SaeRS. These data demonstrate the ability to quantify RNA expression directly from the murine vaginal tract and identify novel genes involved in vaginal colonization by GBS. They also provide more information about the regulation of an important virulence and colonization factor of GBS, pbsP, by the TCS SaeRS.
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| |
|
| Overall design |
RNASeq data from WT and mutant GBS samples taken from liquid culture or the murine vaginal tract
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| |
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| Contributor(s) |
Cook LC, Federle MJ, Hu H, Maienschein-Cline M |
| Citation(s) |
29378799 |
| |
| Submission date |
Jan 25, 2018 |
| Last update date |
May 08, 2018 |
| Contact name |
Laura Cook |
| E-mail(s) |
cooklc@uic.edu
|
| Phone |
(312) 996-8792
|
| Organization name |
University of Illinois at Chicago
|
| Department |
College of Pharmacy
|
| Lab |
Medicinal Chemistry and Pharmacognosy
|
| Street address |
900 S. Ashland Avenue (870)
|
| City |
Chicago |
| State/province |
IL |
| ZIP/Postal code |
60607 |
| Country |
USA |
| |
|
| Platforms (1) |
| GPL24543 |
Illumina HiSeq 4000 (Streptococcus agalactiae A909) |
|
| Samples (14)
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| Relations |
| BioProject |
PRJNA431645 |
| SRA |
SRP131415 |
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