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. 1969 May;16(5):677–684.

Demonstration of the inflammatory activity of the supernatant of hypersensitive lymph node cells incubated with a high dose of antigen

J Krejčí, J Pekárek, J Johanovský, J Švejcar
PMCID: PMC1409599  PMID: 5787773

Abstract

When lymphocytes from hypersensitive animals are incubated with antigen, biologically active substances are formed which inhibit the migration of mesenchymal cells from normal animals.

These substances were tested by intradermal injection in guinea-pigs and rabbits. The supernatants from incubation of lymphocytes with a high dose of antigen caused immediate pallor which lasted several hours. Later there was a macroscopic inflammation maximal at 24 hours. The histology was characteristic of a delayed hypersensitivity reaction.

The injection of the supernatant from hypersensitive lymphocytes incubated with a small dose of antigen caused little or no pallor and was not followed by a delayed inflammatory reaction. Injection of this supernatant together with the antigen did not potentiate or alter the reaction, in contrast to in vitro experiments where the inhibition of the migration by this supernatant was potentiated by antigen.

Besides this factor a distinct factor occurs in extracts and supernatant fluids of lymphocytes cultivated without antigen and those from control animals, which increases vascular permeability. This substance is probably identical with the lymph node permeability factor (LNPF). The possible role of these biologically active substances in the mechanism of delayed type hypersensitivity is discussed.

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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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