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Updated: Aug 12, 2026

Application of a Mouse Ligated Peyer’s Patch Intestinal Loop Assay to Evaluate Bacterial Uptake by M cells
Published on: December 17, 2011
Conversion by Peyer's patch lymphocytes of human enterocytes into M cells that transport bacteria
S Kernéis1, A Bogdanova, J P Kraehenbuhl
1Swiss Institute for Experimental Cancer Research, and Institute of Biochemistry, University of Lausanne, CH-1066 Epalinges-Lausanne, Switzerland.
Abstract:
The epithelium that lines the gut is impermeable to macromolecules and microorganisms, except in Peyer's patches (PPs), where the lymphoid follicle-associated epithelium (FAE) contains M cells that transport antigens and microorganisms. A cultured system that reproduces the main characteristics of FAE and M cells was established by cultivation of PP lymphocytes with the differentiated human intestinal cell line Caco-2. Lymphocytes settled into the epithelial monolayer, inducing reorganization of the brush border and a temperature-dependent transport of particles and Vibrio cholerae. This model system could prove useful for intestinal physiology, vaccine research, and drug delivery studies.
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