ARACHIDONATE IS A POTENT MODULATOR OF HUMAN HEAT-SHOCK GENE-TRANSCRIPTION

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: JURIVICH DA, SISTONEN L, SARGE KD, MORIMOTO RI
Publisher: NATL ACAD SCIENCES
Publication year: 1994
Journal: Proceedings of the National Academy of Sciences
Journal acronym: P NATL ACAD SCI USA
Volume number: 91
Issue number: 6
Start page: 2280
End page: 2284
Number of pages: 5
ISSN: 0027-8424


Abstract

Cell and tissue injury activate the inflammatory response through the action(s) of arachidonic acid and its metabolites, leading to the expression of acute-phase proteins and inflammatory cytokines. At the molecular level, little is known how arachidonic acid regulates the inflammatory response. As inflammation is also associated with local increase in tissue temperatures, we examined whether arachidonic acid was directly involved in the heat shock response. Extracellular exposure to arachidonic acid induced heat shock gene transcription in a dose-dependent manner via acquisition of DNA-binding activity and phosphorylation of heat shock factor 1 (HSF1). In addition, exposure of cells to low concentrations of arachidonic acid, which by themselves did not induce HSF1 DNA-binding activity, reduced the temperature threshold for HSF1 activation from elevated temperatures which are not physiologically relevant (>42 degrees C) to temperatures which can be attained during the febrile response (39-40 degrees C). These results indicate that elevated heat shock gene expression is a direct consequence of an arachidonic acid-mediated cellular response.


Keywords

HEAT SHOCK TRANSCRIPTION FACTORS, INFLAMMATION, PHOSPHORYLATION

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