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The aim of this work was to investigate the potential interactions between intestinal absorbance and ricin poisoning. The Caco-2 cell monolayer and everted intestinal sac (VEIS) models were used. The distribution of ricin in CD-1 mice intoxicated with 0.1 mg/kg of ricin intragastrically was determined by immunohistochemistry. The results showed that ricin could not transfer across the healthy Caco-2 cell monolayer within three hours after poisoning. However, it could pass through the everted rat intestinal wall after 0.5 h of incubation. The toxin in the liver, spleen, lungs and kidneys of mice could be detected as early as 1 h after intoxication. The pathological results were in accordance with the cytotoxicities of ricin in Caco-2, HepG 2, H1299 and MDCK cells, indicating that though no significant symptom in mice could be observed within 3 h after ricin intoxication, important tissues, especially the kidneys, were being injured by the toxin and that the injuries were progressing.

Absorption, Distribution and Pathological Injury in Mice Due to Ricin Poisoning Via the Alimentary Pathway