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Gut associated lympho epithelial tissue bi directional transport of tracer by specialized epithelial cells associated with lymphoid follicles

Gut associated lympho epithelial tissue bi directional transport of tracer by specialized epithelial cells associated with lymphoid follicles

RES Journal of the Reticuloendothelial Society 21(4): 245-254

Horseradish peroxidase was administered by i.v. or intracardiac injection. Peroxidase activity was then localized in mouse Peyer's patches, rabbit appendix and chicken bursa of Fabricius using standard techniques. The reaction product was localized in much greater quantities in the specialized epithelium overlying lymphoid follicles than in the generalized epithelium. Horseradish peroxidase was transmitted into the lumina of the rabbit appendix and the chick bursa as shown by the presence of peroxidase activity in saline washings from these cavities 15 min after intracardiac administration of the tracer. After intraluminal administration of horseradish peroxidase, the reaction product was concentrated in the specialized epithelium. This follicle-associated epithelium is capable of efficient bidirectional transport of macromolecules, some of which may participate in the immunologic activity of gut-associated lymphoepithelial tissues.

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Accession: 005544867

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PMID: 874943

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