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. 1974 Sep;10(3):451–457. doi: 10.1128/iai.10.3.451-457.1974

Studies on the Mechanism of Endogenous Pyrogen Production II. Role of Cell Products in the Regulation of Pyrogen Release from Blood Leukocytes

Phyllis Bodel 1
PMCID: PMC422974  PMID: 4426696

Abstract

Some characteristics of the process by which endogenous pyrogen (EP), the mediator of fever, is released from cells were examined by using human blood leukocytes incubated in vitro. Studies were designed to examine a possible role for leukocyte products, including EP, in the induction, augmentation, or suppression of pyrogen release by blood leukocytes. Products of stimulated leukocytes, including a partially purified preparation of EP, did not induce significant activation of nonstimulated cells. Also, no evidence was obtained that stimulated cell products either augment or inhibit pyrogen production by other stimulated cells. A feedback control of EP production was thus not observed. A crude preparation of EP, containing other products of activated cells, maintained its pyrogenicity when incubated at pH 7.4 but not at pH 5.0. These studies thus provide no support for hypothesized control mechanisms regulating production of EP by blood leukocytes. By contrast, local inactivation of EP at inflammatory sites may modify the amount of EP entering the blood, and hence fever.

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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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