Cytochrome P450 Activator

Cholestyramine (Cholestyramine resin) is an orally active bile acid sequestrant. Cholestyramine upregulates the expression of intestinal Apical sodium-dependent bile acid transporter and hepatic Cholesterol 7α-hydroxylase. Cholestyramine induces the expression of intestinal and hepatic cholesterol synthesis genes as well as hepatic lipogenesis genes, and promotes bile acid- and neutral sterol-mediated reverse cholesterol transport. Cholestyramine reduces intestinal cholesterol absorption and induces cholesterol efflux. Cholestyramine is applicable to research related to coronary artery disease, atherosclerotic cardiovascular disease and atherosclerosis.

Potassium 1H-indol-3-yl sulfate is a metabolite of tryptophan, produced by intestinal microorganisms and combined with sulfate in the liver before entering the circulatory system. Potassium 1H-indol-3-yl sulfate is a potent endogenous agonist of the aryl hydrocarbon receptor (AhR) and a urinary toxin. Potassium 1H-indol-3-yl sulfate can be used for research on kidney diseases.

Pregnenolone 16α-carbonitrile is an orally active prototypical and effective rodent-PXR activator. Pregnenolone 16α-carbonitrile, a synthetic steroid, induces cytochrome P450 3A expression. Pregnenolone 16α-carbonitrile exhibits increased resistance to subsequent stressful insults.

Phillyrin is isolated from Forsythia suspensa Vahl (Oleaceae), has antibacterial and anti-inflammatory activities. Phillyrin has potential inductive effects on rat CYP1A2 and CYP2D1 activities, without affecting CYP2C11 and CYP3A1/2 activities. Phillyrin has anti-influenza A virus activities.

AZD7325 is a potent and orally active partial selective PAM of GABAAα2 and Aα3 receptor (K_i=0.3 and 1.3 nM, respectively), and has less antagonistic efficacy at the Aα1 and Aα5 receptor subtypes. AZD7325 is a moderate CYP1A2 and a potent CYP3A4 inducer in vitro. AZD7325 has the potential for the investigation of anxiety and dravet syndrome. PAM: positive allosteric modulator.

Octocrylene is an organic ultraviolet (UV) filter that absorbs mainly UVB radiation and shorter UVA wavelengths. Octocrylene acts as a partial agonist of PPARγ, which alters the gene transcription profile of lipid metabolism enzymes. In addition, Octocrylene is cytotoxic and genotoxic to human skin fibroblasts and mediates the biosynthesis of estrogens such as estriol in zebrafish larvae, while affecting antioxidant pathways including glutathione transferase and peroxisomes.

Phloracetophenone (2,4,6-trihydroxyacetophenone) is the aglycone part of acetophenone glycoside obtained from Curcuma comosa Roxb, with cholesterol-lowering activity. Phloracetophenone enhances cholesterol 7α-hydroxylase (CYP7A1) activity. Phloracetophenone stimulats bile secretion mediated through Mrp2.

Fipronil is a broad-spectrum insecticide effective against Lepidoptera species as well as thrips, locusts, ants, cockroaches, fleas and ticks. Fipronil selectively inhibits GABA receptor with IC₅₀s of 30 nM and 1600 nM for cockroach and rat GABA receptors, respectively. Glutamate-gated chloride channels (GluCls), which are present in cockroaches but not in mammals, are sensitive to the blocking effect of Fipronil. Fipronil also induces apoptosis in HepG2 cells and promotes the expression of CYP1A1 and CYP3A4 mRNA in human hepatocytes.

Edelfosine (ET-18-OCH3) is an orally active lipid raft modulator and apoptosis inducer that alters membrane fluidity and preferentially inserts into tumor cell membranes. Edelfosine recruits death receptor ligands (FasL/CD95L, TRAIL) and Bid to lipid rafts to form death-inducing signaling complexes, thereby initiating mitochondria-dependent apoptosis and inducing cytochrome c release. Edelfosine also exerts anti-inflammatory effects, promotes L-Selectin shedding, and causes no gastrointestinal or organ toxicity. In addition, Edelfosine inhibits nucleic acid and protein synthesis in Leishmania donovani and exhibits antiproliferative activity. Edelfosine can be used in research on multiple myeloma, inflammatory bowel diseases (such as ulcerative colitis and Crohn's disease), and visceral leishmaniasis.

β-Apo-8'-carotenal (Apocarotenal), an orally active provitamin A carotenoid. β-Apo-8'-carotenal can induce the expression of CYP1A through the Ah receptor-dependent pathway. β-Apo-8'-carotenal can induce cancer cells DNA strand breaks and lipid peroxidation. β-Apo-8'-carotenal can be used for the researches of cancer and metabolic disease.

1-Hydroxypyrene, a biomarker of exposure to polycyclic aromatic hydrocarbons (PAHs), is analyzed in urine samples. 1-Hydroxypyrene is the major biomarker of exposure to pyrenes. 1-Hydroxypyrene is the orally active agonist for aryl hydrocarbon receptor (AhR) and can lead to renal fibrosis.

FPH1(BRD-6125) increases the number and activity of primary human hepatocytes in vitro and promotes the differentiation of iPS cells towards a hepatic lineage.

Tabersonine is a selective, orally active NLRP3 inhibitor. Tabersonine directly binds to the NACHT domain of NLRP3, inhibiting its ATPase activity and oligomerization, thereby blocking ASC spot formation and caspase-1 activation, and reducing the release of pro-inflammatory cytokines such as IL-1β. Tabersonine also inhibits K63-linked ubiquitination of TRAF6, blocking NF-κB, PI3K/Akt, and p38 MAPK signaling pathways. Tabersonine can inhibit inflammatory responses, induce apoptosis of liver cancer cells through mitochondrial pathways and death receptor pathways, reduce mitochondrial membrane potential, promote cytochrome c release, and activate caspase proteins. Tabersonine is mainly used in the study of NLRP3-driven inflammatory diseases (such as acute lung injury, sepsis, peritonitis) and tumors such as liver cancer.

PELI1-IN-1 (compound 3d) is a potent inhibitor of PELI1, E3 ubiquitin ligase. PELI1-IN-1 has anti-tumPELI1-IN-1, a Resveratrol (HY-16561) derivative, is an orally active PELI1 Inhibitor (K_d = 8.2 μM). PELI1-IN-1 markedly interrupts the interaction of PELI1 and SNAIL/SLUG, and inhibits the K63-polyubiquitization of SNAIL/SLUG by PELI1, subsequently downregulating the protein levels of epithelial-mesenchymal transition (EMT) effectors SNAIL/SLUG. PELI1-IN-1 significantly reduces the level of SNAIL, SLUG and Vimentin without affecting the PELI1 expression. PELI1-IN-1 targets the FHA domain of PELI1 and disrupts the interaction, leading to the anti-metastasis of TNBC cells in vitro and in vivo. PELI1-IN-1 shows no evident toxicity in vivo.

Doxylamine succinate is a first-generation antihistamine and acts as a histamine H1 receptor antagonist. Doxylamine succinate is orally active, possessing analgesic and hypnotic activities. Doxylamine succinate enhances the activities of CYP2B, CYP2A, CYP3A and thyroxine-glucuronosyltransferase via promoting substrate hydroxylation and thyroxine metabolic pathways. Doxylamine succinate decreases serum thyroxine (T4) level and elevates serum thyroid-stimulating hormone (TSH) level. Doxylamine succinate induces liver enlargement and increases the activities of hepatic microsomal cytochrome P450, cytochrome b5 and NADPH-cytochrome c reductase. Doxylamine succinate can be used for the research of nausea, allergy, insomnia.

Praeruptorin E is an orally active pyranocoumarin compound. Praeruptorin E can be isolated from the dried roots of Peucedanum praeruptorum Dunn. Praeruptorin E reduces the expression of NF-κB. Praeruptorin E upregulates the expression of PXR and CYP3A4. Praeruptorin E inhibits Th2 cytokines, TNF-α, IL6, MPO, and blocks the Ca²⁺ slow channel. Praeruptorin E promotes pulmonary tissue repair and relaxes porcine coronary artery strips. Praeruptorin E protects mice from lipopolysaccharide- and hydrochloric acid-induced acute lung injury. Praeruptorin E can be used in studies related to asthma and acute lung injury.

Monoethyl phthalate is an orally active PDX-1 activator and the major hydrolytic metabolite of Diethyl phthalate (HY-Y0284) in vivo, with reproductive toxicity. Monoethyl phthalate targets aromatase (aromatase/CYP19A1) and PPAR to induce cell proliferation. The plasma protein binding rate of Monoethyl phthalate in rats and humans is lower than that of Diethyl phthalate. It exhibits significant enterohepatic circulation in rats and mainly accumulates in liver tissues. Monoethyl phthalate shows no estrogenic activity in estrogen-dependent human breast cancer cells. Monoethyl phthalate can be used in studies of reproductive toxicity and related environmental endocrine disruption mechanisms.

7H-Dibenzo[c,g]carbazole (DBC) is an azaarene with high lipophilicity. 7H-Dibenzo[c,g]carbazole has carcinogenic activity and induce DNA adducts in fish, DNA adducts, mutations in diploid human fibroblasts and micronuclei in human blood lymphocytes. 7H-Dibenzo[c,g]carbazole is activated by cytochrome P450 enzymes resulting mainly in the generation of phenolic metabolites.

Oxiconazole (Ro 13-8996) nitrate is a broad spectrum anti-fungal agent which can inhibit the growth of Candida, Aspergillus and Trichophyton. Oxiconazole nitrate is also a highly efficacious activator of CYP3A4 transactivation, which could be antagonized by Rifampicin (HY-B0272) in a competitive manner. Oxiconazole nitrate exhibits inhibitory effect against colorectal cancer (CRC) via peroxiredoxin-2 (PRDX2)-mediated autophagy arrest.

Avatrombopag (AKR-501) maleate is an orally active, non-peptide thrombopoietin receptor (TPO receptor) agonist (EC₅₀: 3.3 nM). Avatrombopag maleate mimics the biological activity of TPO. Avatrombopag maleate increases platelet production by activating intracellular signaling systems and promotes the production of platelets and megakaryocytes from hematopoietic precursor cells. Avatrombopag maleate is a substrate for cytochrome P450 (CYP) 2C9 and CYP3A .