Gemfibrozil 1-O-β-Glucuronide, a metabolite of Gemfibrozil, is a potent and competitive inhibitor of P450 (CYP) isoform CYP2C8, with an IC50 of 4.07 μM.
DL-Acetylshikonin can effectively inhibit tumor cells, it can be used to treat hepatocellular carcinoma cells expressing hepatitis B virus X protein (HBX) by inducing ER stress , an oncoprotein from hepatitis B virus. Acetylshikonin inhibits the production of eicosanoid, is due to the attenuation of cytosolic phospholipase A(2) membrane recruitment via the decrease in [Ca(2+)](i) and to the blockade of cyclooxygenase and 5-lipoxygenase activity.
Thujopsene, a sesquiterpene found in T. dolabrata, exhibits a wide range of biological activities. It inhibits Na+ K+-ATPase and cytochrome P450 (CYP) isoform CYP2B6 with IC50 values of 25.9 µg ml and Ki of 0.8 µM, respectively. Additionally, thujopsene demonstrates antimicrobial efficacy against both Gram-positive and Gram-negative bacteria, such as S. aureus, M. luteus, and S. typhimurium, with MICs ranging from 25-50 µg ml. It also suppresses antigen-induced β-hexosaminidase release in IgE-sensitized RBL-2H3 mast cells (IC50= 25.1 µM) and shows cytotoxicity against A549 non-small cell lung cancer cells with an LC50 of 35.27 µg ml. Furthermore, thujopsene causes mortality in mites D. farinae and T. putrescentiae, with LC50s of 9.82 and 10.92 µg cm2, respectively.
'3'-Hydroxy Repaglinide, a primary CYP2C8 metabolite of Repaglinide, is derived from carbamoylmethyl benzoic acid and is used in the treatment of type II diabetes.
rac-trans-4-hydroxy Glyburide is an active metabolite of the SUR1 Kir6.2 sulfonylurea inhibitor glyburide .1,2It is formed from glyburide by the cytochrome P450 (CYP) isoforms CYP2C8 and CYP2C9.1rac-trans-4-hydroxy Glyburide inhibits glyburide binding to rat brain synaptosomes at the high and low affinity sites of SUR1 Kir6.2 with IC50values of 0.95 and 100 nM, respectively.2 1.Zharikova, O.L., Fokina, V.M., Nanovskaya, T.N., et al.Identification of the major human hepatic and placental enzymes responsible for the biotransformation of glyburideBiochem. Pharmacol.78(12)1483-1490(2009) 2.Hill, R.A., Rudra, S., Peng, B., et al.Hydroxyl-substituted sulfonylureas as potent inhibitors of specific [3H]glyburide binding to rat brain synaptosomesBioorg. Med. Chem.11(9)2099-2113(2003)
N-desmethyl Rosiglitazone is a major metabolite of rosiglitazone , a potent and selective PPARγ ligand present in formulations that have been used to treat type 2 diabetes. Rosiglitazone is metabolized by the cytochrome P450 (CYP) isoform CYP2C8 to form N-desmethyl rosiglitazone.
Olmesartan medoxomil impurity C is an Olmesartan medoxomil impurity. Olmesartan medoxomil is a potent and selective angiotensin AT1 receptor inhibitor with IC50 of 66.2 μM. [1]. Senda A, et al. Effects of Angiotensin II Receptor Blockers on Metabolism of Arachidonic Acid via CYP2C8. Biol Pharm Bull. 2015;38(12):1975-9. [2]. Shah S, et al. Simultaneous Quantitative Analysis of Olmesartan Medoxomil and Amlodipine Besylate in Plasma by High-performance Liquid Chromatography Technique. J Young Pharm. 2012 Apr;4(2):88-94.
PKI-179 is a potent and orally active dual PI3K mTOR inhibitor, with IC50s of 8 nM, 24 nM, 74 nM, 77 nM, and 0.42 nM for PI3K-α, PI3K-β, PI3K-γ, PI3K-δ and mTOR, respectively. PKI-179 also exhibits activity over E545K and H1047R, with IC50s of 14 nM and 11 nM, respectively. PKI-179 shows anti-tumor activity in vivo[1][2]. PKI-179 inhibits the cell proliferation, with IC50s of 22 nM and 29 nM for MDA361 and PC3 cells, respectively[1].PKI-179 shows inhibitory activity against a panel of 361 other kinases, hERG and cytochrome P450 (CYP) isoforms at concentrations up to >30 μM, but does have activity for CYP2C8 (IC50=3 μM)[1]. PKI-179 (5-50 mg kg; p.o. once daily for 40 days) inhibits the tumor growth and is well tolerated in nude mice bearing MDA-361 human breast cancer tumors[1].PKI-179 (50 mg kg; p.o.) results in good inhibition of PI3K signaling in nude mice bearing MDA361 tumor xenografts[1].PKI-179 exhibits good oral bioavailability (98% in nude mouse, 46% in rat, 38% in monkey, and 61% in dog) and a high half-life (>60 min) [1]. [1]. Venkatesan AM, et, al. PKI-179: an orally efficacious dual phosphatidylinositol-3-kinase (PI3K) mammalian target of rapamycin (mTOR) inhibitor. Bioorg Med Chem Lett. 2010 Oct 1;20(19):5869-73.[2]. Rehan M. A structural insight into the inhibitory mechanism of an orally active PI3K mTOR dual inhibitor, PKI-179 using computational approaches. J Mol Graph Model. 2015 Nov;62:226-234.
PKI-179 is an orally bioavailable dual inhibitor of PI3K and mammalian target of rapamycin (mTOR). In an in vitro enzymatic assay, it potently inhibits PI3K (IC50s = 8, 24, 17, and 74 nM for isoforms α, β, δ, and γ, respectively), two common PI3Kα mutants, E545K and H1047R (IC50s = 14 and 11 nM, respectively), and mTOR (IC50 = 0.42 nM). PKI-179 is selective for PI3K and mTOR over a panel of 361 other kinases at IC50 values up to 50 μM, hERG (IC50 > 30 μM), and cytochrome P450 (CYP) isoforms (IC50s > 30 μM), but does have activity for CYP2C8 (IC50 = 3 μM). It inhibits proliferation through the Akt/mTOR signaling pathway in MDA-361 breast and PC3MM2 prostate cancer cell lines in vitro (IC50s = 22 and 29 nM, respectively) and inhibits tumor growth in an MDA-361 mouse xenograft model when used at a dose of 50 mg/kg.