Abstract:
:To clarify the biliary immune response against food antigen, we studied biliary antibody response to intravenous and oral primary immunization with ovomucoid (OM) and the effects of cholera toxin B subunit (CTB) on the oral response in mice. Specific antibodies against OM were induced in biliary and serum immunoglobulin (Ig) A, IgG and IgM by intravenous (i.v.) administration of the antigen. However, the antibodies were induced only in biliary Igs, but not in serum Igs, by oral intubation of the antigen. The higher levels of anti-OM in bile than in serum observed in the oral group may favour the assumption that antigen-stimulated lymphoid cells migrate to the liver, gall bladder or bile duct where they produce antibody. Both serum and biliary anti-OM responses to oral immunization were potentiated remarkably by oral administration of CTB with the antigen, the IgM anti-OM response being potentiated to the largest extent. In the CTB-treated mice, the IgA anti-OM level was higher in bile than in serum. Serum level of IgG anti-OM was much lower in the CTB-treated mice than in the i.v.-immunized mice, but the biliary level of IgG anti-OM in the CTB-treated mice was comparable to that in the i.v.-immunized mice. The relationship between serum and biliary IgA and IgG antibodies suggests that CTB potentiates biliary anti-OM responses not solely through increasing systemic levels of the antibodies but through modulating the processes specific to mucosal presentation of antigen.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Sugita-Konishi Y,Kumagai Sdoi
10.1111/j.1365-3083.1992.tb03259.xkeywords:
subject
Has Abstractpub_date
1992-05-01 00:00:00pages
597-602issue
5eissn
0300-9475issn
1365-3083journal_volume
35pub_type
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