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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Contrasting effects of E type prostaglandin ( EP) receptor agonists on core body temperature in rats.

Prostaglandin E2 (PGE2) is thought to be a principal fever mediator. There are four subtypes of PGE ( EP) receptors, EP1-EP4. We investigated which EP receptors mediate PGE2-induced hyperthermia by injecting selective EP receptor agonists into the rat lateral cerebral ventricle under unrestrained condition. ONO-DI-004, an EP1 receptor agonist, increased the core temperature (T(c)) in a dose-dependent manner (1.6+/-0.1 degrees C at 20 nmol, with the peak 30 min after injection) with a time course similar to PGE2-induced hyperthermia. ONO-AE1-259-01 (20 nmol), an EP2 receptor agonist, did not change the T(c). ONO-AE-248 (20 nmol), an EP3 receptor agonist, also increased the T(c). However, the peak effect was delayed (1.2+/-0.2 degrees C, 50 min after injection) compared to PGE2. In contrast, ONO-AE1-329, an EP4 receptor agonist, decreased the T(c). These findings suggest that the EP1, EP3, and EP4 receptors all may contribute to the thermoregulatory response to PGE2, but each may have a different role.[1]


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