Protein Analysis of Shigella dysenteriae Type 1 Shows Changes in Virulence and Metabolism
Author Information
Author(s): Kuntumalla Srilatha, Zhang Quanshun, Braisted John C, Fleischmann Robert D, Peterson Scott N, Donohue-Rolfe Arthur, Tzipori Saul, Pieper Rembert
Primary Institution: Pathogen Functional Genomics Resource Center, J. Craig Venter Institute
Hypothesis
How does the protein expression of Shigella dysenteriae type 1 differ between in vivo and in vitro conditions?
Conclusion
The study found that Shigella dysenteriae type 1 alters its protein expression to enhance survival and virulence in the host gut environment.
Supporting Evidence
- 1761 proteins were quantitated at a 5% false discovery rate.
- SD1 cells switched to anaerobic energy metabolism under in vivo conditions.
- High in vivo abundances of proteins involved in acid resistance indicated bacterial survival responses.
Takeaway
Scientists studied how a germ called Shigella changes its proteins when it's inside a pig's tummy compared to when it's grown in a lab, and they found it makes different proteins to help it survive and cause sickness.
Methodology
The study used 2D-LC-MS/MS and APEX for quantitative proteome profiling of Shigella dysenteriae from in vitro and in vivo samples.
Potential Biases
Potential bias may arise from the use of a single animal model and the specific conditions under which the bacteria were cultured.
Limitations
The study was limited to a specific strain of Shigella and a small sample size of gnotobiotic piglets.
Participant Demographics
Gnotobiotic piglets were used as the animal model for in vivo studies.
Statistical Information
P-Value
<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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