Shiga Toxin Transport in Intestinal Cells
Author Information
Author(s): Baibakov Boris, Murtazina Rakhilya, Elowsky Christian, Giardiello Francis M., Kovbasnjuk Olga
Primary Institution: Johns Hopkins University School of Medicine
Hypothesis
Shiga toxin is transported into the nucleoli of intestinal epithelial cells via a carrier-dependent process.
Conclusion
Shiga toxin is actively transported into the nucleoli of intestinal epithelial cells, which may contribute to intestinal pathology.
Supporting Evidence
- Shiga toxin is transported into nucleoli in ~90% of intestinal epithelial T84 cells.
- Stx nucleolar uptake is not due to diffusion but is an active carrier-dependent process.
- StxB is sufficient for the toxin to enter the nucleoli.
- Transport of StxB into nucleoli is inhibited by low temperature and ATP depletion.
Takeaway
Shiga toxin can sneak into the tiny parts of our gut cells called nucleoli, which might make us sick.
Methodology
The study used intestinal epithelial T84 cells and a digitonin-based cell membrane permeabilization technique to analyze the trafficking of Shiga toxin.
Limitations
The study primarily used a cell model and may not fully represent in vivo conditions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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