Endothelial Domes and Neutrophil Emigration
Author Information
Author(s): Phillipson Mia, Kaur Jaswinder, Colarusso Pina, Ballantyne Christie M., Kubes Paul
Primary Institution: University of Calgary
Hypothesis
Transcellular emigration of neutrophils would greatly increase vascular permeability.
Conclusion
The study found that the mode of neutrophil emigration does not affect vascular barrier integrity due to the presence of endothelial dome-like structures.
Supporting Evidence
- Neutrophils predominantly emigrated through paracellular pathways in wild-type mice.
- Mac-1 deficient neutrophils showed delayed emigration and primarily used transcellular pathways.
- Endothelial dome-like structures were observed enveloping emigrating neutrophils.
Takeaway
When white blood cells called neutrophils move out of blood vessels, they can do it in two ways, but it doesn't change how leaky the blood vessels get because of special structures that cover them.
Methodology
The study used in vivo imaging techniques, including intravital video microscopy and electron microscopy, to observe neutrophil emigration in mice.
Potential Biases
Potential bias in the interpretation of microscopy images and the specific strains of mice used.
Limitations
The study primarily focused on two mouse strains and may not generalize to other conditions or species.
Participant Demographics
Male C57BL/6 and Mac-1 deficient mice, weighing between 18 and 33 grams.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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