Prostaglandin A-2

PGA2 is a naturally occurring prostaglandin in gorgonian corals where it may function in self defense. It is generally not present in mammals. PGA2 has low biological potency in most bioassays, but it does show some antiviral/antitumor activity.[1] At a 25 uM concentration, PGA2 blocks the cell cycle progression of NIH 3T3 cells at the G1 and G2/M phase .[2] It has also been shown to act as a vasodilator with natriuretic properties.[3]

Ketoprofen (RP-19583) is a propionic acid derivative and nonsteroidal anti-inflammatory drug (NSAID) with anti-inflammatory, analgesic, and antipyretic effects. It inhibits cyclo-oxygenase I and II, decreasing the formation of prostaglandin and thromboxane precursors. This reduction in prostaglandin synthesis, mediated by prostaglandin synthase, is responsible for its therapeutic effects. Additionally, Ketoprofen decreases thromboxane A2 formation via thromboxane synthase, inhibiting platelet aggregation.

Lornoxicam (Chlortenoxicam) (chlortenoxicam) is a new nonsteroidal anti-inflammatory drug (NSAID) of the oxicam class with analgesic, anti-inflammatory, and antipyretic properties. Lornoxicam differs from other oxicam compounds in its potent inhibition of prostaglandin biosynthesis, a property that explains the particularly pronounced efficacy of the drug. Lornoxicam is approved for use in Japan.

Rebamipide (OPC12759) is a quinolinone derivative with anti-ulcer and anti-inflammatory activities. Rebamipide induces cyclooxygenase 2 (COX2) synthesis which results in an increase in endogenous prostaglandin synthesis in the gastric mucosa. This agent also inhibits H. pylori-induced production of tumor necrosis factor (TNF) alpha and subsequent inflammation of the gastric mucosa. In addition, rebamipide scavenges oxygen-derived free radicals that potentially cause mucosal injury, and stimulates prostaglandin EP4 receptor gene expression followed by mucous secretion, thereby enhancing the gastric mucosal defense.

Bromfenac sodium hydrate (Bromfenac monosodium salt sesquihydrate) is the sodium salt form of bromfenac, a nonsteroidal anti-inflammatory drug (NSAID) with analgesic and anti-inflammatory properties. Upon ophthalmic administration, bromfenac binds to and inhibits cyclooxygenase II (COX II), an enzyme that converts arachidonic acid to cyclic endoperoxides, which are prostaglandin (PG) precursors. By inhibiting PG formation, bromfenac prevents PG-induced inflammation, vasodilation, leukocytosis, disruption of the blood-aqueous humor barrier, increased vascular permeability, and elevated intraocular pressure (IOP).

Beta-Sitosterol (SKF 14463) has recently been shown to induce G2 M arrest, endoreduplication, and apoptosis through the Bcl-2 and PI3K Akt signaling pathways. Beta-Sitosterol (SKF 14463) , a main dietary phytosterol found in plants, may have the potential for prevention and therapy for human cancer. Although the exact mechanism of action of Beta-Sitosterol (SKF 14463) is unknown, it may be related to cholesterol metabolism or anti-inflammatory effects (via interference with prostaglandin metabolism). Beta-Sitosterol (SKF 14463) induces apoptosis and activates key caspases in MDA-MB-231 human breast cancer cells.

HPGDS inhibitor 1 is a novel and selective inhibitor for Hematopoietic Prostaglandin D Synthase (HPGDS) with an IC50 Value of 0.7 nM.

HHS-0701 is a sulfur-triazole exchange (SuTEx) ligand. HHS-0701 is a potent inhibitor of tyrosine-reactive prostaglandin reductase 2 (PTGR2). HHS-0701 can block PTGR2 metabolism of the lipid substrate 15-Keto-PGE2.

(2-{[2-(2-fluorophenoxy)ethyl]sulfanyl}-1H-benzimidazol-1-yl)acetic acid is a prostaglandin-like CRTH2 antagonist with an IC50 < 10 μM, which can be used in studies of rhinitis, COPD, rheumatoid arthritis, eczema and conjunctivitis.

HPGDS inhibitor 2 (GSK-2894631A) is a potent, selective hematopoietic prostaglandin D synthase (h-pgds) inhibitor, IC50 = 9.9 nm.

2-(E-2-decenoylamino)ethyl 2-(cyclohexylethyl) sulfide inhibits stress-induced ulcers by maintaining phospholipase A2 and prostaglandin E2 levels in rats subjected to water immersion-restrained stress-induced ulceration.

HQL-79 is a selective and orally active human hematopoietic prostaglandin D synthase (H-PGDS) inhibitor. It inhibits the synthesis of PGD2 and acts as an anti-allergic agent (Kd: 0.8 μM and IC50: 6 μM). It also shows no obvious effect on COX-1, COX-2, m-P

Omidenepag (UR-7276) is a selective and potent prostaglandin E2 receptor 2 (EP2) agonist and a novel topical ocular hypotensive agent.Omidenepag is used in the study of glaucoma and hypertension.

AGU654 (Compound 44) is a selective mPGES-1 inhibitor with an IC50 value of 2.9 nM against mPGES-1. By inhibiting mPGES-1, AGU654 interrupts the pathway where COX-1 2 converts arachidonic acid to prostaglandin E2 (PGE2), effectively reducing inflammatory responses, pain, and fever symptoms. In models using activated human monocyte-derived macrophages and whole blood, AGU654 selectively inhibits PGE2 production induced by bacterial endotoxins, while preserving the production of other prostaglandins. In guinea pig models, AGU654 significantly alleviates fever, inflammation, and inflammatory pain, demonstrating excellent anti-inflammatory, analgesic, and antipyretic effects. AGU654 holds promise as a new approach for researching inflammatory diseases and pain.

Licarin A is a natural anti-inflammatory lignan that inhibiting PKCα βII and p38 MAPK pathways, thereby decreasing TNF-α and prostaglandin D2 (PGD2) secretion as well as COX-2 expression.

Butaprost is a chemical compound that functions as a selective agonist for the prostaglandin E receptor (EP2). It exhibits an EC50 of 33 nM and a Ki of 2.4 μM when interacting with the murine EP2 receptor. However, Butaprost demonstrates lower activity against murine EP1, EP3, and EP4 receptors. Furthermore, it effectively attenuates fibrosis by inhibiting the TGF-β/Smad2 signaling pathway [1] [2] [3].

Prostalene is a prostaglandin F(2)alpha analogue used in pregnancy.

2,5-dimethyl Celecoxib is a derivative of celecoxib that does not inhibit COX-2 (IC50 = >100 μM).1 It does inhibit microsomal prostaglandin E synthase-1 (mPGES-1) in HeLa cells (IC50 = 15.6 μM) and reduces prostaglandin E2 production in HeLa, A549, and HCA-7 cells (IC50s = 0.64, 0.83, and 3.08 μM, respectively).2 It inhibits proliferation of drug-sensitive RPMI8226 and multidrug-resistant 8226 Dox40 multiple myeloma cells, as well as increases the rate of apoptosis when used at concentrations of 20 and 30 μM.3 2,5-dimethyl Celecoxib reduces the expression of survivin, cyclin A, cyclin B, MEK1, and MEK2 in 8226 Dox40 cells. The antiproliferative effect of 2,5-dimethyl celecoxib is independent of mPGES-1 inhibition.2References1. Zhu, J., Song, X., Lin, H.-P., et al. Using cyclooxygenase-2 inhibitors as molecular platforms to develop a new class of apoptosis-inducing agents. J. Natl. Cancer Inst. 94(23), 1745-1757 (2002).2. Wobst, I., Schiffmann, S., Birod, K., et al. Dimethylcelecoxib inhibits prostaglandin E2 production. Biochem. Pharmacol. 76(1), 62-69 (2008).3. Kardosh, A., Soriano, N., Liu, Y.-T., et al. Multitarget inhibition of drug-resistant multiple myeloma cell lines by dimethyl-celecoxib (DMC), a non-COX-2 inhibitory analog of celecoxib. Blood 106(13), 4330-4338 (2005). 2,5-dimethyl Celecoxib is a derivative of celecoxib that does not inhibit COX-2 (IC50 = >100 μM).1 It does inhibit microsomal prostaglandin E synthase-1 (mPGES-1) in HeLa cells (IC50 = 15.6 μM) and reduces prostaglandin E2 production in HeLa, A549, and HCA-7 cells (IC50s = 0.64, 0.83, and 3.08 μM, respectively).2 It inhibits proliferation of drug-sensitive RPMI8226 and multidrug-resistant 8226 Dox40 multiple myeloma cells, as well as increases the rate of apoptosis when used at concentrations of 20 and 30 μM.3 2,5-dimethyl Celecoxib reduces the expression of survivin, cyclin A, cyclin B, MEK1, and MEK2 in 8226 Dox40 cells. The antiproliferative effect of 2,5-dimethyl celecoxib is independent of mPGES-1 inhibition.2 References1. Zhu, J., Song, X., Lin, H.-P., et al. Using cyclooxygenase-2 inhibitors as molecular platforms to develop a new class of apoptosis-inducing agents. J. Natl. Cancer Inst. 94(23), 1745-1757 (2002).2. Wobst, I., Schiffmann, S., Birod, K., et al. Dimethylcelecoxib inhibits prostaglandin E2 production. Biochem. Pharmacol. 76(1), 62-69 (2008).3. Kardosh, A., Soriano, N., Liu, Y.-T., et al. Multitarget inhibition of drug-resistant multiple myeloma cell lines by dimethyl-celecoxib (DMC), a non-COX-2 inhibitory analog of celecoxib. Blood 106(13), 4330-4338 (2005).

PGBx is a mixture of oligomers of PGB1 with a molecular weight of 1,000-1,500. It has antioxidant and free radical trapping activity that was first studied in isolated mitochondria.1 PGBx has anti-inflammatory and cytoprotective activity which may be attributed to inhibition of the 14 kDa sPLA2.2,3 At a dose of 1 mg/kg, PGBx significantly reduces the incidence of ulcers in rats.2References1. Polis, B.D., Polis, E., and Kwong, S. Protection and reactivation of oxidative phosphorylation in mitochondria by a stable free-radical prostaglandin polymer (PGBΧ). Proceedings of the National Academy of Sciences of the United States of America 76, 1598-1602 (1979).2. Kumashiro, R., Devlin, T.M., Kholoussy, A.M., et al. Prostaglandin BΧ in the prevention of stress ulcers in rats. International Surgery 70, 247-250 (1985).3. Franson, R.C., Rosenthal, M.D., and Regelson, W. Mechanism(s) of cytoprotective and anti-inflammatory activity of PGB1 oligomers: PGBx has potent anti-phospholipase A2 and anti-oxidant activity. Prostaglandins, Leukotrienes and Essential Fatty Acids 43, 63-70 (1991). PGBx is a mixture of oligomers of PGB1 with a molecular weight of 1,000-1,500. It has antioxidant and free radical trapping activity that was first studied in isolated mitochondria.1 PGBx has anti-inflammatory and cytoprotective activity which may be attributed to inhibition of the 14 kDa sPLA2.2,3 At a dose of 1 mg/kg, PGBx significantly reduces the incidence of ulcers in rats.2 References1. Polis, B.D., Polis, E., and Kwong, S. Protection and reactivation of oxidative phosphorylation in mitochondria by a stable free-radical prostaglandin polymer (PGBΧ). Proceedings of the National Academy of Sciences of the United States of America 76, 1598-1602 (1979).2. Kumashiro, R., Devlin, T.M., Kholoussy, A.M., et al. Prostaglandin BΧ in the prevention of stress ulcers in rats. International Surgery 70, 247-250 (1985).3. Franson, R.C., Rosenthal, M.D., and Regelson, W. Mechanism(s) of cytoprotective and anti-inflammatory activity of PGB1 oligomers: PGBx has potent anti-phospholipase A2 and anti-oxidant activity. Prostaglandins, Leukotrienes and Essential Fatty Acids 43, 63-70 (1991).

1-O-Hexadecyl-sn-glycerol is a bioactive alkyl glyceryl ether. It reduces UVB-induced cell death and production of reactive oxygen species (ROS) and prostaglandin E2 in normal human epidermal keratinocytes (NHEKs). 1-O-Hexadecyl-sn-glycerol (50 μM) increases coronary flow and left ventricular developed pressure and reduces malondialdehyde (MDA) formation ex vivo in a rat heart model of ischemia/reperfusion injury. [2].Maulik, N., Tosaki, A., Engelman, R.M., et al. Myocardial salvage by chimyl alcohol: Possible role of peroxisomal dysfunction in reperfusion injury Ann. N.Y. Acad. Sci. 723(1), 380-384 (1994).

Prostaglandin E2 activates four distinct G protein-coupled receptors, EP1-4. Rivenprost is a potent and selective agonist for the EP4 receptor (Ki = 0.7, 56, 620, and >10,000 nM for EP4, EP3, EP2, and EP1, respectively). It has been used to promote EP4-mediated bone formation, prevent bone loss related to osteoporosis, drive osteoblast differentiation, and stabilize bone implants.[1][2][3][4][5] Rivenprost has also been used to support wound healing.[6]

8-iso Prostaglandin A2 is an isoprostane produced by the nonenzymatic oxidation of arachidonic acid.

8-iso-13,14-dihydro-15-keto Prostaglandin F2α (8-iso-13,14-dihydro-15-keto PGF2α) is a metabolite of the isoprostane, 8-isoprostane (8-iso PGF2α), in rabbits, monkeys and humans. 8-iso PGF2α is a PG-like product of non-specific lipid peroxidation. In both humans and monkeys, exogenously infused 8-isoprostane is converted primarily to metabolites having 2 or 4 carbon atoms removed from the top side chain by β-oxidation. A similar pattern is observed when tritiated 8-isoprostane is infused into rabbits. Early in the infusion (within 10 minutes) 8-iso-13,14-dihydro-15-keto PGF2α was a significant component of the metabolite profile, which was comprised mostly of dinor 8-isoprostane metabolites. 8-iso-13,14-dihydro-15-keto PGF2α weakly inhibits the U-46619 or collagen-induced aggregation of human platelets, although a number of the E-series isoprostanes are much more potent in this assay.

8-iso-15-keto Prostaglandin F2α (8-iso-15-keto PGF2α) is a metabolite of the isoprostane 8-iso PGF2α in rabbits, monkeys, and humans. 8-iso PGF2α is a prostaglandin-like product of non-specific lipid peroxidation. In humans and monkeys, exogenously infused 8-iso PGF2α is converted to metabolites with 2 or 4 carbon atoms removed from the top side chain by β-oxidation, with a similar pattern observed in tritiated 8-iso PGF2α-infused rabbits. Early in the infusion (within 1-2 minutes), 8-iso-15-keto PGF2α is a major component of the metabolite profile, primarily comprising unmetabolized 8-iso PGF2α. 8-iso-15-keto PGF2α is a vasoconstrictor when tested on the rat isolated thoracic aorta, acting via the TP (thromboxane) receptor.