title: Persorption of luminal antigenic molecule and its specific antibody via apoptotic epithelial cells of intestinal villi and Peyer's patches into peripheral blood in rats.
abstract: The possibility of persorption of bovine serum albumin (BSA) molecules from mucous epithelial cells and its mechanism were investigated in rats orally pre-immunized by BSA for 14 consecutive days. In the small and large intestines, both the BSA antigen (BSA-Ag) and its specific antibody (SpAb) were absorbed by the epithelial cells at the late apoptotic stage (ApoEp), and were subsequently transcytosed by membranes of the small vesicles. The basal cytoplasms containing highly-concentrated BSA-Ag and SpAb were occasionally fragmented into small cytoplasmic droplets that were secreted into the lamina propria. In Peyer's patches, both BSA-Ag and SpAb were more actively absorbed and transcytosed toward the dome area by the ApoEp of the dome apex than by the M cells. BSA-Ag and SpAb were finally persorbed into the portal blood and lymph, but were never secreted into the bile. They were also engulfed by macrophage-like cells in the villous lamina propria, mesenteric lymph node and spleen, and by hepatocytes in the liver. These findings suggest that sensitized soluble luminal antigens are taken up by ApoEp in the small intestine and are finally persorbed into the peripheral blood. The uptake of luminal antigen might be mediated by its luminal SpAb.
authors.affiliation: Department of Bioresource and Agrobiosciences, Graduate School of Science and Technology, Kobe University, Kobe, Japan.
authors.forename: Midori
authors.initials: M
authors.lastname: Yuji
authors.forename: Masahito
authors.initials: M
authors.lastname: Tsubata
authors.forename: Keigi
authors.initials: K
authors.lastname: Chin
authors.forename: Sachiko
authors.initials: S
authors.lastname: Onishi
authors.forename: Tetsurou
authors.initials: T
authors.lastname: Inamoto
authors.forename: Wang-Mei
authors.initials: WM
authors.lastname: Qi
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Warita
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Yokoyama
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Hoshi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitagawa
mesh_terms: D000818:Animals; D000906:Antibodies / Q000378:metabolism*; D017209:Apoptosis / Q000502:physiology; D004847:Epithelial Cells / Q000378:metabolism*; D007413:Intestinal Mucosa / Q000166:cytology / Q000378:metabolism*; D008297:Male; D010581:Peyer's Patches / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D012710:Serum Albumin, Bovine / Q000276:immunology
chemical_list: D000906:Antibodies; D012710:Serum Albumin, Bovine