How Shigella Uses IpaC to Invade Cells
Author Information
Author(s): Mounier Joëlle, Popoff Michel R., Enninga Jost, Frame Margaret C., Sansonetti Philippe J., Van Nhieu Guy Tran
Primary Institution: Institut Pasteur, Paris, France
Hypothesis
The IpaC carboxyterminal effector domain mediates Src-dependent actin polymerization during Shigella invasion of epithelial cells.
Conclusion
The IpaC effector domain is crucial for Src-dependent actin polymerization and ruffle formation during Shigella invasion.
Supporting Evidence
- Src is recruited early at the bacterial contact site during Shigella invasion.
- Actin polymerization is necessary for the proper localization of Src in ruffles.
- Shigella mutants lacking IpaC fail to recruit Src at entry sites.
- The IpaC effector domain is sufficient to induce Src-dependent actin ruffles.
- Actin polymerization enhances the translocation of T3S effectors during Shigella invasion.
Takeaway
Shigella bacteria use a special protein called IpaC to help them invade our cells by making the cell's structure change and allowing the bacteria to enter.
Methodology
The study used dynamic and immunofluorescence microscopy to analyze Src recruitment and actin polymerization during Shigella invasion.
Potential Biases
Potential bias in the selection of bacterial strains and experimental conditions.
Limitations
The study primarily focused on specific bacterial strains and may not represent all Shigella species.
Participant Demographics
HeLa cells were used as the model for epithelial cells.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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