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Published on: September 21, 2011
Antigen-binding activity and allergenicity of heterologous gamma-globulin absorbed from the rectum
Abstract:
The molecular integrity of rectally absorbed antigens was studied in rats and mice. ABout 2% in the radioactivity of 125I-labelled horse gamma-globulin administered rectally reached the blood circulation. One fifth of this absorbed radioactivity (0.4%) reacted with anti-Fab antibody and about one eight (0.25%) of the original antigen-binding activity was maintained. The results indicated that a small but significant portion of the rectally administered proteins remained intact and retained the immunological function. Rectally-administered proteins induced IgE antibody responses in the rat and the mouse.
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