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Contenuto archiviato il 2024-05-29

Homeostasis during fever and inflammation: A Role of Epoxygenase

Obiettivo

OBJECTIVE: The ultimate goal of the proposed research is to understand mechanisms involved in limiting the magnitude of the febrile response during infection. A specific aim is to continue a laboratory research on the mechanisms involving epoxygense in controlling fever and inflammation. BACKGROUND: Fever is a neuroimmunomodulatory response mediated by pro-inflammatory cytokines, synthesis of which is activated by bacterial, viral, fungal, and other infectious factors. Principal mechanism of fever involv es a cytokine-provoked liberation of arachidonic acid from cell membranes and induction of cyclooxygenase-2 (COX-2) in cells. Subsequently, COX-2 converts arachidonic acid into prostaglandins. These are molecular events that are also fundamental to the inflammatory processes. JUSTIFICATION: It is well known that exacerbated fever can be harmful.

Clinical data indicate, however, that fever's magnitude very rarely reaches unsafe high measures. But what keeps fever from reaching dangerous heights? The proposer's study initiated in the USA revealed that epoxyeicosanoids, i.e. products of the metabolism of arachidonic acid via epoxygenases (an alternative enzyme system to COX-2), act as endogenous antipyretic and anti-inflammatory factors. Recent data fro m the proposer's laboratory indicate that epoxyeicosanoids reduce the activity of COX-2, which mimics a well-known action of the aspirin-like drugs. These data suggest that epoxyeicosanoids represent a homeostatic mechanism upon inflammation.

An overall hypothesis has been put forward that this endogenous mechanism operates during sickness to set the limits of the immune response, preventing the inflammatory components from reaching a detrimental over-expression. SIGNIFICANCE: A new concept is emerging t hat modulation of this homeostatic process may be included into the current repertoire of prophylaxis, immunotherapy, and treatment of the acute and chronic inflammatory disorders.

Campo scientifico (EuroSciVoc)

Argomento(i)

Invito a presentare proposte

FP6-2002-MOBILITY-12
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Meccanismo di finanziamento

IRG - Marie Curie actions-International re-integration grants

Coordinatore

UNIWERSYTET MIKOLAJA KOPERNIKA
Contributo UE
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Costo totale
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