CYP3 Inhibitor

Verapamil ((±)-Verapamil) is a calcium channel blocker and a potent and orally active first-generation P-glycoprotein (P-gp) inhibitor. Verapamil also inhibits CYP3A4. Verapamil has the potential for high blood pressure, heart arrhythmias and angina research.

Fenofibrate is a selective PPARα agonist with an EC₅₀ of 30 μM. Fenofibrate also inhibits human cytochrome P450 isoforms, with IC₅₀s of 0.2, 0.7, 9.7, 4.8 and 142.1 μM for CYP2C19, CYP2B6, CYP2C9, CYP2C8, and CYP3A4, respectively.

Verapamil hydrochloride ((±)-Verapamil hydrochloride) is a calcium channel blocker and a potent and orally active first-generation P-glycoprotein (P-gp) inhibitor. Verapamil hydrochloride also inhibits CYP3A4. Verapamil hydrochloride has the potential for high blood pressure, heart arrhythmias and angina research.

Ketoconazole (R-41400) is an imidazole anti-fungal agent, a CYP3A4 and CYP24A1 inhibitor.

1-Aminobenzotriazole is a nonspecific and irreversible inhibitor of cytochrome P450 (P450).

Curcumenol ((+)-Curcumenol) is a natural compound with oral efficacy, exhibiting an IC₅₀ of 12.6 μM and a K_i of 10.8 μM against human CYP3A4. Curcumenol inhibits TNFα-induced phosphorylation/degradation of IκBα, phosphorylation/nuclear translocation of NF-κB p65, as well as the upregulation of MMP3, MMP9, MMP13, TRAF3, IL1RL1, TNFα and IL-1β. Curcumenol suppresses LPS-induced phosphorylation of Akt and p38 MAPK, as well as the production of pro-inflammatory mediators/proteins, and downregulates the SLC7A11/NF-κB/TGF-β pathway. Curcumenol binds to and inhibits the activation of Fyn and Lyn, blocks the function of downstream FcεRI signaling components, and reduces the release of allergic mediators/cytokines. Curcumenol upregulates the expression of KDM6B, and promotes chondrocyte proliferation and cartilage repair. Curcumenol induces ferroptosis and apoptosis, regulates the EMT process, and inhibits tumor growth and metastasis of triple-negative breast cancer. Curcumenol possesses anti-inflammatory, neuroprotective, antioxidant, antitumor, antiviral and hepatoprotective activities. Curcumenol can be used in research related to intervertebral disc degeneration, cancer, inflammation, central nervous system neurodegenerative diseases, allergic reactions and knee osteoarthritis.

Clarithromycin (Standard) is the analytical standard of Clarithromycin. This product is intended for research and analytical applications. Clarithromycin has a broad spectrum of antimicrobial activity. Clarithromycin inhibits the CYP3A4-catalyzed triazolam alpha-hydroxylation with the IC50 (Ki) value of 56 (43) μM. Clarithromycin significantly inhibits the HERG potassium current.Clarithromycin affects the autophagic flux by impairing the signaling pathway linking hERG1 and PI3K.

Fenofibrate (Standard) is the analytical standard of Fenofibrate. This product is intended for research and analytical applications. Fenofibrate is a selective PPARα agonist with an EC₅₀ of 30 μM. Fenofibrate also inhibits human cytochrome P450 isoforms, with IC₅₀s of 0.2, 0.7, 9.7, 4.8 and 142.1 μM for CYP2C19, CYP2B6, CYP2C9, CYP2C8, and CYP3A4, respectively.

Stiripentol (STP) is an anticonvulsant agent, which can inhibit N-demethylation of CLB to NCLB mediatated by CYP3A4 (noncompetitively) and CYP2C19 (competitively) with K_i of 1.59±0.07 and 0.516±0.065 μM and IC₅₀ of 1.58 and 3.29 μM, respectively.

Clarithromycin has a broad spectrum of antimicrobial activity. Clarithromycin inhibits the CYP3A4-catalyzed triazolam alpha-hydroxylation with the IC₅₀ (K_i) value of 56 (43) μM. Clarithromycin significantly inhibits the HERG potassium current.Clarithromycin affects the autophagic flux by impairing the signaling pathway linking hERG1 and PI3K.

Gemfibrozil 1-O-β-Glucuronide, a metabolite of Gemfibrozil (CI-719; HY-B0258), is a potent and competitive P450 (CYP) isoform CYP2C8 inhibitor with an IC₅₀ of 4.07 μM.

Cepharanthine is a natural product that can be isolated from the plant Stephania cephalantha Hayata. Cepharanthine has anti-severe acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) activities. Cepharanthine has good effective in suppressing viral proliferation (half maximal (50%) inhibitory concentration (IC₅₀) and 90% inhibitory concentration (IC₉₀) values of 1.90 and 4.46 μM. Cepharanthine can also effectively reverses P-gp-mediated multidrug resistance in K562 cells and increase enhances the sensitivity of anticancer agents in xenograft mice model. Cepharanthine shows inhibitory effects of human liver cytochrome P450 enzymes CYP3A4, CYP2E1 and CYP2C9. Cepharanthine has antitumor, anti-inflammatory and antinociceptive effects.

Schisandrin A inhibits CYP3A activity with an IC₅₀ of 6.60 μM and K_i of 5.83 μM, respectively.

Cobicistat is a potent and selective inhibitor of cytochrome P450 3A (CYP3A) enzymes with IC₅₀s of 30-285 nM. Cobicistat is a pharmacokinetic enhancer which increases the overall absorption of several HIV medications.

Troleandomycin (Triacetyloleandomycin), a macrolide acrolide antibiotic, is a selective CYP3A inhibitor. Troleandomycin is an oral corticosteroid for asthma study.

Isavuconazole (BAL-4815) is a triazole proagent with antifungal activity against yeasts, molds, and dimorphic fungi. Isavuconazole inhibits ergosterol biosynthesis and results in the disruption of fungal membrane structure and function. Isavuconazole is a moderate inhibitor of CYP3A4.

Clobetasol propionate is a potent and selective CYP3A5 inhibitor with an IC₅₀ of 0.206 μM. Clobetasol propionate has no inhibiting on CYP3A4 or other major CYPs. Clobetasol propionate is a corticosteroid and has the potential for psoriasis and other dermatoses research.

Atazanavir (BMS-232632) is a highly selective and orally active HIV-1 protease inhibitor . Atazanavir is a substrate and inhibitor of CYP3A4, and an inhibitor of P-glycoprotein (P-gp). Atazanavir is also a SARS-CoV 3CL^pro inhibitor with an IC₅₀ of 3.49 μM. Atazanavir inhibits cardiac fibrosis, hyperlipidemia and induces malignant glioma death.

Tetrahydrocurcumin is a Curcuminoid found in turmeric (Curcuma longa) that is produced by the reduction of Curcumin. Tetrahydrocurcumin inhibit CYP2C9 and CYP3A4.

Ticlopidine (PCR 5332), an antithrombotic proagent, acts as an allosteric, noncompetitive inhibitor of CD39 with the IC₅₀ of 81.7 μM. Ticlopidine blocks several NTPDase isoenzymes with IC₅₀s of 170 μM and 149 μM for NTPDase2 and NTPDase3, respectively. Ticlopidine is an inhibitor of CYP2C19 human liver cytochrome. Ticlopidine inhibits CYP2C9 and CYP3A4 with IC₅₀s of 26.0 and 32.3 μM, respectively.