Characterization of [3 H]-prostaglandin E2 binding to prostaglandin EP4 receptors expressed with Semliki Forest virus
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Prostaglandin E2 receptor EP4 contributes to inflammatory pain hypersensitivity.
Prostaglandin E(2) (PGE(2)) is both an inflammatory mediator released at the site of tissue inflammation and a neuromodulator that alters neuronal excitability and synaptic processing. The effects of PGE(2) are mediated by four G-protein-coupled EP receptors (EP1-EP4). Here we show that the EP4 receptor subtype is expressed by a subset of primary sensory dorsal root ganglion (DRG) neurons, and ...
متن کاملActivation of EP4 receptors contributes to prostaglandin E2-mediated stimulation of renal sensory nerves.
Induction of cyclooxygenase-2 (COX-2) in the renal pelvic wall increases prostaglandin E(2) (PGE(2)) leading to stimulation of cAMP production, which results in substance P (SP) release and activation of renal mechanosensory nerves. The subtype of PGE receptors involved, EP2 and/or EP4, was studied by immunohistochemistry and renal pelvic administration of agonists and antagonists of EP2 and EP...
متن کاملProstaglandin I2 and prostaglandin E2 modulate human intrarenal artery contractility through prostaglandin E2-EP4, prostacyclin-IP, and thromboxane A2-TP receptors.
Cyclooxygenase inhibitors decrease renal blood flow in settings with decreased effective circulating volume. The present study examined the hypothesis that prostaglandins, prostaglandin E2 (PGE2) and prostacyclin (PGI2), induce relaxation of human intrarenal arteries through PGE2-EP and PGI2-IP receptors. Intrarenal arteries were microdissected from human nephrectomy samples (n=53, median diame...
متن کاملDoxycycline Attenuates Endotoxin-Induced Uveitis by Prostaglandin E2-EP4 Signaling.
PURPOSE We explored the anti-inflammatory effects of doxycycline in experimental uveitis and the underlying mechanisms. METHODS Rats with endotoxin-induced uveitis (EIU) received doxycycline (1.5 mg/kg) or the control vehicle via intraperitoneal injection. Clinical scores were graded under a slit lamp. Rat peritoneal macrophages were used in vitro to further explore the anti-inflammatory mech...
متن کاملProstaglandin E2-prostaglandin E receptor subtype 4 (EP4) signaling mediates UV irradiation-induced systemic immunosuppression.
UV radiation induces systemic immunosuppression. Because nonsteroidal anti-inflammatory drugs suppress UV-induced immunosuppression, prostanoids have been suspected as a crucial mediator of this UV effect. However, the identity of the prostanoid involved and its mechanism of action remain unclear. Here, we addressed this issue by subjecting mice deficient in each prostanoid receptor individuall...
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ژورنال
عنوان ژورنال: British Journal of Pharmacology
سال: 1997
ISSN: 0007-1188
DOI: 10.1038/sj.bjp.0701332