Translocation of Ribosomal Immunostimulant Through an In Vitro-Reconstituted Digestive Barrier Containing M-Like Cells
- 1 December 2000
- journal article
- research article
- Published by Wiley in Scandinavian Journal of Immunology
- Vol. 52 (6), 588-594
- https://doi.org/10.1046/j.1365-3083.2000.00819.x
Abstract
Ribosomal preparations of pathogenic micro-organisms of the upper respiratory tract can be delivered orally for the prevention of recurrent infectious episodes, because they induce mucosal and protective immune responses. The mechanism of mucosal barrier translocation is difficult to study in animal models, little is therefore known about this process. In order to circumvent these problems, we have examined the uptake of ribosomal preparations in three experimental systems that model human intestinal cells. We found that M-like cells displayed a 8.7-fold increase in the uptake of a ribosomal immunostimulant when compared to absorptive or crypt enterocyte-like cells. The product was taken up, translocated, and delivered in the basolateral compartment by cultured M-like cells. No translocation was observed across monolayers of T84 cells (model of crypt cells). Only minimal translocation occured through monolayers of Caco-2 cells (model of absorptive enterocytes). This suggests that, in vivo, colyophilisat is delivered mainly through the M cells overlying lymphoid follicles (Peyer's patches) or nodules of the gut-associated mucosal lymphoid tissue, which are the major inductor sites of mucosal responses. Use of the M-like cell cultured model could be a key step for the development of even more efficient immunostimulators in animals and human.Keywords
This publication has 16 references indexed in Scilit:
- Plasticity of the gastrointestinal epithelium: The M cell paradigm and opportunism of pathogenic microorganismsSeminars in Immunology, 1999
- Emerging concepts in M cell function and Peyer's patch developmentSeminars in Immunology, 1999
- REGULATION OF THE MOVEMENT OF SOLUTES ACROSS TIGHT JUNCTIONSAnnual Review of Physiology, 1998
- Exploitation of Mammalian Host Cell Functions by Bacterial PathogensScience, 1997
- Kinetics of specific salivary IgA responses in man after oral challenge by a ribosomal immunostimulantInternational Journal of Immunopharmacology, 1997
- Inhibition of Streptococcus pneumoniae Adhesion by Specific Salivary IgA after Oral Immunisation with a Ribosomal ImmunostimulantDrugs, 1997
- ANTIGEN SAMPLING ACROSS EPITHELIAL BARRIERS AND INDUCTION OF MUCOSAL IMMUNE RESPONSESAnnual Review of Immunology, 1996
- M cells and the pathogenesis of mucosal and systemic infectionsTrends in Microbiology, 1996
- Use of Bacterial Ribosomal Immunostimulators in Respiratory Tract InfectionsClinical Immunotherapeutics, 1995
- Antibody-producing cells in peripheral blood and tonsils after oral treatment of children with bacterial ribosomesInternational Journal of Immunopharmacology, 1994