x receptor

Forskolin (Coleonol) is a natural product, an adenylate cyclase activator (EC50=0.5 μM). Forskolin increases cAMP levels, activates PXR and FXR, and induces autophagy. Forskolin produces positive inotropic effects in the heart, and has platelet anticoagulant and antihypertensive effects.

Retinoic acid (Tretinoin), a metabolite of vitamin A, is a natural agonist of the retinoic acid receptor RAR and inhibits RARα β γ (IC50=14 nM). Retinoic acid induces cellular differentiation, reduces cellular proliferation, and inhibits tumorigenesis.

Isotretinoin (13-cis-Retinoic acid) binds to and activates nuclear retinoic acid receptors (RARs), which act as transcription factors that promote cell differentiation and apoptosis. This naturally occurring retinoic acid has potential antineoplastic activity, exhibits immunomodulatory and anti-inflammatory responses, and inhibits ornithine decarboxylase, thereby decreasing polyamine synthesis and keratinization.

2-Hydroxyanthraquinone is an anthraquinone that has been found inSpermacoce latifoliaand has antibacterial and estrogenic activities.1,2It is active againstB. subtilisandB. cereus(MICs = 1.9 and 62.5 μg ml, respectively).12-Hydroxyanthraquinone (19 μM) induces estrogen receptor α (ERα) activation in a yeast two-hybrid assay.2 1.Luo, Y., Shen, H.-Y., Shen, Q.-X., et al.A new anthraquinone and a new naphthoquinone from the whole plant of Spermacoce latifoliJ. Asian Nat. Prod. Res.19(9)869-876(2017) 2.Kurihara, R., Shiraishi, F., Tanaka, N., et al.Presence and estrogenicity of anthracene derivatives in coastal Japanese watersEnviron. Toxicol. Chem.24(8)1984-1993(2005)

Lynestrenol is a synthetic progestational hormone, is the progesterone receptor agonist

(20S)-Protopanaxatriol (g-PPT)(g-PPT), a metabolite of ginsenoside, could regulate endothelial cell functions through the estrogen receptor and glucocorticoid receptor.

Magnolol (5,5'-Diallyl-2,2'-biphenyldiol) is a dual agonist of RXRα( EC50=10.4 μM) and PPARγ(EC50=17.7 μM). It blocks TNF-α-induced NF-KB activation.

1. Glaucocalyxin A (Leukamenin F)-SBE-β-CD could be useful with a better solubility and sustained function in drug delivery. 2. Glaucocalyxin A activates caspase-3, decreases BAD phosphorylation, and reduces the expression of X-linked inhibitor of apoptosis protein. 3. Glaucocalyxin A inhibits Akt phosphorylation, suppresses proliferation, and promotes apoptosis in a dose-dependent manner, but not in normal glial cells. 4. Glaucocalyxin A inhibits collagen-stimulated tyrosine phosphorylation of Syk, LAT, and phospholipase Cγ2, the signaling events in collagen receptor GPⅥ pathway. 5. Glaucocalyxin A could potentially be developed as an antiplatelet and antithrombotic agent, can inhibit platelet p-selectin secretion and integrin activation by convulxin, is a GPVI selective ligand.

24-Hydroxycholesterol (Cholest-5-ene-3beta,24-diol) is an oxysterol compound that is an activator of the n-methyl-d-aspartate receptor (NMDA) and the transcription factor LXR, which has been used in the study of cardiogenesis and pancreatic cancer.

7α-Hydroxy-4-cholesten-3-one is an intermediate in bile acid synthesis from cholesterol, a PXR agonist, and a biomarker for bile acid loss and diseases related to defective bile acid biosynthesis. It is also the physiological substrate for [CYP8B1].

Nagilactone B is extracted from the root bark of Podocarpus nagi and it also is a liver X receptor (LXR) agonist.

Saikosaponin A has a variety of pharmacological benefits, including antiepileptic, anti-osteoporosis, antioxidant, anti-in ammatory, immunomodulatory, and anti-bacterial activities. It can effectively attenuate neuropathic pain in CCI rats by inhibiting the activation of p38 MAPK and NF-κB signaling pathways in spinal cord. It can inhibit NMDA receptor current and persistent sodium current, and inhibit the TNF-α level, the IL-1β production, and cysteine-aspartic acid protease (caspase)-1 activity.

Bile acids are essential for solubilization and transport of dietary lipids, are the major products of cholesterol catabolism, and are physiological ligands for farnesoid X receptor (FXR), a nuclear receptor that regulates genes involved in lipid metabolism.1They are also inherently cytotoxic, as physiological imbalance contributes to increased oxidative stress.2,3Bile acid-controlled signaling pathways are promising novel targets to treat such metabolic diseases as obesity, type II diabetes, hyperlipidemia, and atherosclerosis.Guggulsterone, derived from resin of the guggul tree, is a competitive antagonist of FXR bothin vitroandin vivo.4Thecisstereoisomer of guggulsterone, (E)-guggulsterone, decreases chenodeoxycholic acid (CDCA)-induced FXR activation with an IC50value of 15 μM.5,6By inhibiting CDCA-induced transactivation of FXR, guggulsterone lowers low-density lipoprotein cholesterol and triglyceride levels in rodents fed a high cholesterol diet.4 1.Makishima, M., Okamoto, A.Y., Repa, J.J., et al.Identification of a nuclear receptor for bile acidsScience2841362-1365(1999) 2.Barbier, O., Torra, I.P., Sirvent, A., et al.FXR induces the UGT2B4 enzyme in hepatocytes: A potential mechanism of negative feedback control of FXR activityGastroenterology1241926-1940(2003) 3.Tan, K.P., Yang, M., and Ito, S.Activation of nuclear factor (erythroid-2 like) factor 2 by toxic bile acids provokes adaptive defense responses to enhance cell survival at the emergence of oxidative stressMol. Pharmacol.72(5)1380-1390(2007) 4.Urizar, N.L., Liverman, A.B., Dodds, D.T., et al.A natural product that lowers cholesterol as an anatagonist ligand for FXRScience296(5573)1703-1706(2002) 5.Cui, J., Huang, L., Zhao, A., et al.Guggulsterone is a farnesoid X receptor antagonist in coactivator association assays but acts to enhance transcription of bile salt export pumpThe Journal of Biological Chemisty278(12)10214-10220(2003) 6.Wu, J., Xia, C., Meier, J., et al.The hypolipidemic natural product guggulsterone acts as an antagonist of the bile acid receptorMolecular Endocrinology16(7)1590-1597(2002)

Norcholic Acid (Nor Cholic Acid) is a bile acid that promotes tumor progression and immune escape by modulating the farnesol X receptor in hepatocellular carcinoma.Norcholic Acid is efficiently absorbed from the intestine and is rapidly secreted into the bile.

Androsterone, a metabolic product of testosterone, can activate Farnesoid X Receptor (FXR).

Gymnemagenin is a potent and selective antagonist for the β isoform of LXR, it has antihyperglycemic activity.

Larsucosterol trimethylamine (DUR-928 trimethylamine) is a potent liver X receptor (LXR) antagonist that modulates endogenous epigenetics, reduces lipid accumulation in hepatocytes, attenuates lipopolysaccharide (LPS) and TNFα-induced inflammatory responses in macrophages, and alleviates LPS- and acetaminophen (ATMP)-induced multi-organ damage.

Yamogenin is a diastereomer of diosgenin, which we have identified as the compound responsible for the anti-hyperlipidemic effect of fenugreek.

Alismanol M, a protostane-type triterpenoid isolated from the rhizome of Alisma orientale, functions as a farnesoid X receptor (FXR) agonist with an EC50 value of 50.25 μM. It is utilized in researching cholestasis and nonalcoholic steatohepatitis [1].

Licochalcone E is a potential LXRβ agonist.

Bacopaside X (9.06 μM) showed binding affinity towards the D1 receptor.

Gymnestrogenin has a dual LXRα± α2 antagonistic profile.

Hyperforin, a natural product from Hypericum, is commonly used as an antidepressant and also has neurological, inflammatory, antimicrobial, antitumor and antiangiogenic effects. Hyperforin acts as a monoamine reuptake inhibitor (MRI) in vitro, including serotonin, norepinephrine, dopamine, GABA, and glutamate, with an IC 50 of ≈0.1 μg mL. Hyperforin is also capable of inducing the cytochrome P450 enzymes, CYP3A4 and CYP2C9, through binding to and activation of the pregnane X receptor. Hyperforin is capable of activating TRPC6 channels by binding to a specific motif.

Iristectorigenin B (Iristectrigenin B) is a potent hepatic X-receptor (LXR) modulator and a small molecule compound isolated from *Belamcanda chinensis*. It promotes the expression of ABCA264 and ABCG7 in macrophage RAW 1.1 cells.