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. 1978 Dec;35(6):923–931.

Passage of immunoglobulins from plasma to the oral cavity in rhesus monkeys.

S J Challacombe, M W Russell, J E Hawkes, L A Bergmeier, T Lehner
PMCID: PMC1457446  PMID: 104924

Abstract

The passage of immunoglobulin from plasma to the oral cavity was studied in rhesus monkeys. Immunoglobulins G, A and M were purified from pooled rhesus monkey serum, radiolabelled with 125I and injected intravenously into twelve monkeys. Sequential samples of oral fluids were taken over a 24 h period and were assayed for radioactivity. Radioactivity could be detected in crevicular fluid washings after 0.5 h in monkeys injected with IgG and IgA, and after 2 h in monkeys given IgM. Maximal levels were found after 4 h with each immunoglobulin. Radioactivity in parotid and mixed saliva could be detected in all animals after 30 min, reaching a maximal level after 4 h. Ultracentrifugation on sucrose density gradients revealed that most of the radioactivity in crevicular fluid washings was in the 7S zone in the animals given IgG and IgA, and in a 19S zone in animals given IgM. The radioactivity in partoid saliva did not represent intact immunoglobulin molecules, since all the activity was present in zones of low molecular weight in animals given IgG, IgA or IgM. In mixed saliva a small amount of radioactivity was found in the immunoglobulin zones. The results suggest that intact molecules of IgG, IgA and IgM can pass from plasma to the oral cavity via crevicular fluid, and could contribute to oral defence mechanisms particularly in the crevicular domain. The volume of crevicular fluid in the approximal space of deciduous molars of rhesus monkeys was estimated to be approximately 0.3 microliter.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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