Abstract
Objectives
Evidence from the literature that inflammation is a systemic biological phenomenon prompted us to investigate whether inoculation of different irritants to the footpad of mice might influence the kinetics of resident peritoneal cells.
Methods
Mice were inoculated in the footpad at different time intervals with Mycobacterium bovis bacillus Calmette-Guerin (BCG), Ehrlich ascitic tumor cells or lipopolysaccharide (LPS), and resident peritoneal cells were analyzed by flow cytometry.
Results
The results indicate that different stimuli induced different responses in resident peritoneal cells. FoxP3 positive regulatory T cells increased drastically in number after BCG inoculation. Conversely, tumor cell inoculation induced a decrease in FoxP3-positive T cells in the peritoneal cavity, although this effect was not statistically significant. Results also show that cells from the paw migrate to the popliteal lymph node and to the peritoneal cavity. Yet, there are cells in the peritoneal cavity that migrate to the popliteal lymph node.
Conclusion
These data show that cells from the peritoneal cavity are influenced by pathologies in remote regions of the animal. How this novel phenomenon influences overall immune responses, courses of infection and tumor growth are open to further investigation.
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Acknowledgments
We are indebted to Prof. Esper Kallás from the University of São Paulo for providing us with the use of the FlowJo program and the FACSCanto cytometer. We are also grateful for the skillful suggestions and comments of Mauro Nogueira Martins, Ronni Rômulo Novaes e Brito and Tatiana C. C. Oliveira. This work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo–FAPESP.
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Palos, M.C., Azevedo, M.C.A., Thies, F.G. et al. Different inflammatory stimuli in the footpad of mice influence the kinetics of resident peritoneal cells. Inflamm. Res. 61, 1187–1194 (2012). https://doi.org/10.1007/s00011-012-0514-y
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DOI: https://doi.org/10.1007/s00011-012-0514-y