prostaglandin h2

Prostaglandin H2 (PGH2), initially isolated from the incubation of arachidonic acid with ovine seminal vesicle microsomes, acts as a potent vasoconstrictor. It serves as the precursor for all 2-series prostaglandins (PGs) and thromboxanes (TXs). Moreover, as a TP receptor agonist, PGH2 irreversibly aggregates human platelets at concentrations of 50-100 ng/ml.

LCB-2853 is a potent thromboxane A2/prostaglandin H2 (TXA2/PGH2) receptor antagonist with antiplatelet aggregation, antivasospasm, and antithrombotic effects.

Vedaprofen (PM 150) inhibits COX-1 and reduces prostaglandin H2 synthesis with anti-inflammatory activities. Vedaprofen is an inhibitor of Escherichia coli sliding clamp with the IC50 of 222 μM and Ki of 131 μM.

U-44069 serinol amide is a derivative of U-44069 and serves as a stable analogue of the endoperoxide, Prostaglandin H2. It functions as a vasoconstrictor, capable of inducing calcium (Ca2+) influx in preglomerular vessels.

SQ 26655 is an antagonist of thromboxane A2/prostaglandin H2.

Thielavin A is a fungal metabolite originally isolated from T. terricola that is related to thielavin B . Thielavin A inhibits COX, blocking both the conversion of arachidonic acid to prostaglandin H2 and the conversion of PGH2 to PGE2 . Thielavin A also inhibits glucose-6-phosphatase in rat liver microsomes (IC50 = 4.6 μM). It is a non-competitive inhibitor of α-glucosidase from S. cerevisiae (IC50 = 23.8 μM; Ki = 27.8 μM).

2-arachidonyl glycerol (2-AG) exhibits cannabinoid (CB) agonist activity at the CB1 receptor, is an important endogenous monoglyceride species, and is thus considered to be the natural ligand for the CB1 receptor. 2-AG can also be metabolized by cyclooxygenase-2 and specific prostaglandin H2 (PGH2) isomerases to form PG 2-glyceryl esters. Fluprostenol serinol amide (Flu-SA) is a stable analog of PGF2α 2-glyceryl ester that has much greater stability. The biological activity of Flu-SA has not yet been determined.

FCE-27262 is a prostaglandin H2/thromboxane A2 receptor antagonist.

Mipitroban is a thromboxane A2/prostaglandin H2 antagonist.

U-51605, a stable analog of the endoperoxide prostaglandin H2 (PGH2), functions as an inhibitor with greater selectivity towards prostacyclin (PGI) synthase over thromboxane (TX) synthase. It also acts as a partial agonist at TP receptors. Studies show that at a concentration of 2.8 µM, U-51605 effectively inhibits PGI synthase in human foreskin fibroblasts, while a concentration of 5.6 µM is required to inhibit human platelet TX synthase. Furthermore, U-51605, at up to 1 µM, decreases the release of prostacyclin in SHR aorta triggered by the calcium ionophore A-23187 without impacting TXA2 production, and notably enhances the release of PGE2 and PGF2α.

α-Viniferin known as 2-arylbenzofuran flavonoids, that are inhibitors of prostaglandin H2 synthetase. α-Viniferin has anti-Alzheimer's disease, anti-tuberculosis, anti-tumor, anti-inflammation, anti-diabetes and other pharmacological activitie

(R)-(+)-Bay-K-8644 is a Ca2+ channel and dihydropyridine agonist that inhibits Ba2+ currents (IBa), induces central respiratory depression in cats, and inhibits platelet activation through competitive antagonism of thromboxane A2-prostaglandin H2 receptors.