GPCR/G-Protein

Nocloprost (SH 475) is a prostaglandin E2 (PGE2) analog, an EP1 and EP3 receptor agonist with local gastric protection and ulcer healing effects.

<p>Cicaprost (ZK 96480) is an IP agonist with artery relaxing effects; EC50 is 5.8 nM.</p>

Pentacosafluorotridecanoic Acid (PFTrDA) is a perfluoroalkyl substance (PFAS) that exhibits various biological impacts across different species. In zebrafish embryos, exposure to PFTrDA induces yolk sac edema and increases mRNA expression of thyroid hormone synthesis genes, including tshβ, at concentrations of 0.1 and 0.3 mg/L. At a dosage of 10 mg/kg, PFTrDA reduces serum testosterone and luteinizing hormone levels, as well as palmitic acid, linoleic acid, and oleic acid levels in the testicular interstitial cells of late adolescent rats. In humans, maternal plasma levels of PFTrDA during pregnancy are positively correlated with the development of eczema in female infants (but not male infants), and PFTrDA levels are higher in the livers of cancerous humans compared to non-cancerous ones. Additionally, PFTrDA is found in marine mammals.

COX-2-IN-6: Potent, selective COX-2 inhibitor; oral; IC50 0.84μM, Ki 69nM; blocks PGE2 synthesis; prevents colorectal cancer.

<p>Taranabant: potent CB1 receptor inverse agonist; inhibits agonists with 0.13 nM Ki in vitro.</p>

CP-608039 is a selective adenosine A3 receptor agonist for both human A3 and human A1 receptors.

<p>Toladryl is a derivative of Diphenhydramine that can cross the blood-brain barrier and exhibits oral activity, with antihistamine and anticholinergic properties. Its anticholinergic effects are approximately a tenth of those seen with Diphenhydramine, yet it offers 2-4 times the protection against lethal doses of histamine in guinea pigs. The side effects of Toladryl are fewer and milder compared to Diphenhydramine; however, at higher doses, it may cause symptoms such as insomnia, agitation, and disorientation related to the central nervous system. Toladryl is utilized in the research of allergic diseases.</p>

SphK1-IN-1: SphK1 ATPase inhibitor, IC50=2.48 μM, potential for cancer research.

P2Y2 and P2Y4 receptor agonist

<p>Nedemelteon is an agonist of the melatonin receptor (melatonin receptor).</p>

<p>Setomagpran is an antagonist of the mas-related G protein-coupled receptor (MRGPR) and possesses anti-inflammatory properties.</p>

<p>HU 433, a synthetic cannabinoid, acts as a CB2 receptor agonist and is an enantiomer of HU 308. It provides anti-inflammatory and neuroprotective effects by binding to the CB2 receptor, primarily found on immune cells, thereby modulating immune responses and inflammation. Additionally, HU 433 influences microglial signaling pathways, particularly LPS and IFNγ-mediated routes, affecting the phosphorylation of MAPKs, including ERK1/2, JNK, p38, and Akt. This compound is valuable in researching neuroinflammation and retinal diseases.</p>

<p>Mrgx2 antagonist-3 (Compound B-40) is a highly selective antagonist of the MrgX2 receptor, with an IC50 range of 0.042-2.5 nM. It blocks downstream G protein signaling and β-arrestin recruitment, inhibiting Mrgx2 receptor-mediated calcium influx and cell degranulation. Mrgx2 antagonist-3 shows potential for research in inflammation-associated diseases and pruritus, such as chronic urticaria and allergic asthma.</p>

Tipelukast (KCA 757), an oral drug for asthma research, blocks leukotrienes and fights inflammation and fibrosis.

Apafant (WEB 2086) is a PAF antagonist that blocks eosinophil activation and can be used to study experimental allergic conjunctivitis in guinea pigs.

GLP-1 receptor agonist 15 (Example 4) is a GLP receptor agonist with an EC50 of 0.74 nM. It exhibits an IC50 of 10.1 μM against the hERG potassium ion channel. This compound is applicable for research in the diabetes field.

<p>GRKs-IN-1 has remarkable potency against and selectivity for G protein-coupled receptor kinase 2 GRK2 (IC50: 130 nM) and GRK5 (IC50: 7.1 μM).</p>

L-654284 is an α2-adrenergic receptor antagonist characterized by its notable selectivity. It competes with 3H-clonidine and 3H-rauwolscine for binding in vitro, exhibiting Ki values of 0.8 nM and 1.1 nM, respectively. L-654284 effectively blocks the pre-ejaculatory effects of clonidine in isolated rat vas deferens, with a pA2 value of 9.1. The compound demonstrates significant selectivity for α2 over α1 adrenergic receptors, with a Ki value of 110 nM against 3H-prazosin binding. In vivo, L-654284 significantly increases the turnover of norepinephrine in the rat cerebral cortex, indicating its activity in blocking α2-adrenergic receptors within the central nervous system.

<p>Methacycline, a tetracycline antibiotic, inhibits bacterial protein synthesis and effectively suppresses epithelial-mesenchymal transition (EMT). It blocks EMT in vitro and inhibits fibrogenesis in vivo without directly affecting the TGF-β1Smad signaling pathway. As an antimicrobial agent, Methacycline holds potential for research in pulmonary fibrosis.</p>

ATL444 is an adenosine receptor antagonist with affinity (Ki values) for rA1AR, rA2AAR, rA2BAR, and rA3AR of 7.0, 2.5, 61.8, and >1000 nM, respectively.