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. 1978 Sep;21(3):806–812. doi: 10.1128/iai.21.3.806-812.1978

Pathogenesis of fever in delayed hypersensitivity: factors influencing release of pyrogen-inducing lymphokines.

E Atkins, L Francis
PMCID: PMC422069  PMID: 711334

Abstract

In continuing studies on the pathogenesis of fever in states of delayed hypersensitivity, we have investigated the conditions for the release of an endogenous pyrogen (EP)-inducing lymphokine from draining-lymph-node lymphocytes of rabbits with delayed hypersensitivity to bovine gamma globulin. Using doses of 4 X 10(7) to 5 X 10(7) blood leukocytes (BL) as a source of EP, we found that ratios of about 5:1 of viable lymphocytes to BL were required to stimulate the BL to produce detectable amounts of EP in vitro. Both irradiated lymphocytes (1,700 R) as well as those from steroid-treated donors retained their ability to activate BL when incubated with antigen, properties consistent with activated "T" lymphocytes. In experiments to determine effects of temperature and duration of incubation on lymphokine release, the maximum EP-releasing activity was found to be present in supernatants of sensitized lymphocytes incubated with antigen for 18 h at 37 degrees C. These studies have confirmed that sensitized lymphocytes release a soluble, pyrogen-inducing lymphokine when incubated with antigen and further demonstrate that tissue macrophages (Kupffer cells) as well as BL can be activated to produce EP in vitro by this agent.

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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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