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Pingili RB, Pawar AK, Challa SR. Effect of chrysin on the formation of N-acetyl-p-benzoquinoneimine, a toxic metabolite of paracetamol in rats and isolated rat hepatocytes. Chem Biol Interact 2019; 302:123-134. [PMID: 30794797 DOI: 10.1016/j.cbi.2019.02.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/10/2019] [Accepted: 02/14/2019] [Indexed: 12/18/2022]
Abstract
Paracetamol (N-acetyl-para amino phenol) is the most commonly used analgesic and antipyretic around the world. Its causes hepatotoxicity and nephrotoxicity at overdose or even at therapeutic doses. It is primarily metabolized by glucuronidation and sulfate conjugation. It is also metabolized by cytochrome-P450 system (CYP2E1, CYP1A2 and CYP 3A4), leading to the formation of N-acetyl-p-benzoquinoneimine (NAPQI). The present study was planned to investigate the influence of chrysin (known CYP2E1 and CYP3A4 inhibitor) on the bioactivation of paracetamol to NAPQI using rat liver microsomes in vitro and rats in vivo. Paracetamol (80 mg/kg) was administered orally without or with silymarin (100 mg/kg), a known CYP2E1 inhibitor and chrysin (100 and 200 mg/kg) to rats for 15 consecutive days. The area under the plasma concentration-time curve (AUC0-∞) and the peak plasma concentration (Cmax) of paracetamol were dose-dependently increased with chrysin (100 and 200 mg/kg) compared to paracetamol control group. On the other hand, the AUC0-∞ and Cmax of NAPQI were decreased significantly with chrysin (100 and 200 mg/kg). The elevated liver and kidney function markers were significantly reduced by chrysin and silymarin compared to paracetamol control group (P < 0.01). Histopathological studies of liver and kidney also well correlated with liver and kidney function tests. Chrysin also reduced the formation of NAPQI in the incubation samples of rat hepatocytes. The present study (both in vivo and in vitro) results revealed that chrysin might be inhibited the CYP2E1, CYP1A2 and CYP3A4-mediated metabolism of paracetamol; thereby decreased the formation of NAPQI and protected the liver and kidney.
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Affiliation(s)
- Ravindra Babu Pingili
- Research and Development, Department of Pharmacy, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India; Department of Pharmacology, KVSR Siddhartha College of Pharmaceutical Sciences, Vijayawada, Andhra Pradesh, India.
| | - A Krishnamanjari Pawar
- Department of Pharmaceutical Analysis, University College of Pharmaceutical Sciences, Andhra University, Visakhapatnam, Andhra Pradesh, India
| | - Siva R Challa
- Department of Pharmacology, KVSR Siddhartha College of Pharmaceutical Sciences, Vijayawada, Andhra Pradesh, India.
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2
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Feng Y, Teng X, Gu J, Yu B, Luo Y, Ye L. Novel anti-cancer agents: design, synthesis, biological activity, molecular docking, and MD simulations of 2, 3, 4, 5-tetrahydro-1H-pyrido-[4,3-b]indole derivatives. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2271-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Lee JY, Cho H, Thangapandian S, Lim C, Chun YJ, Lee Y, Choi S, Kim S. Adaptable Small Ligand of CYP1 Enzymes for Use in Understanding the Structural Features Determining Isoform Selectivity. ACS Med Chem Lett 2018; 9:1247-1252. [PMID: 30613334 DOI: 10.1021/acsmedchemlett.8b00409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 10/29/2018] [Indexed: 01/08/2023] Open
Abstract
Although several families of compounds have been identified as scaffolds for inhibitors of the CYP1 family, the isoform selectivity determining structural features has not been fully clarified at the molecular interaction level. We studied the CYP1 isoform selectivity for stilbenoid inhibitors using integrated induced fit docking and molecular dynamics simulations. The hydrophobic interactions with the specific phenylalanine residues in the F helix are correlated with inhibitory potency in the CYP1 family. Through this study, we found that the adaptable, small, and semirigid ligand is a promising starting point for the development of isoform-selective inhibitors and investigation of selectivity-determining features.
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Affiliation(s)
- Joo-Youn Lee
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
- Chemical Data-Driven Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Korea
| | - Hyunkyung Cho
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | | | - Chaemin Lim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Young-Jin Chun
- College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
| | - Yoonji Lee
- College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Sun Choi
- College of Pharmacy, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
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4
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Structure-Based Drug Design for Cytochrome P450 Family 1 Inhibitors. Bioinorg Chem Appl 2018; 2018:3924608. [PMID: 30147715 PMCID: PMC6083639 DOI: 10.1155/2018/3924608] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/17/2018] [Accepted: 06/20/2018] [Indexed: 12/13/2022] Open
Abstract
Cytochromes P450 are a class of metalloproteins which are responsible for electron transfer in a wide spectrum of reactions including metabolic biotransformation of endogenous and exogenous substrates. The superfamily of cytochromes P450 consists of families and subfamilies which are characterized by a specific structure and substrate specificity. Cytochromes P450 family 1 (CYP1s) play a distinctive role in the metabolism of drugs and chemical procarcinogens. In recent decades, these hemoproteins have been intensively studied with the use of computational methods which have been recently developed remarkably to be used in the process of drug design by the virtual screening of compounds in order to find agents with desired properties. Moreover, the molecular modeling of proteins and ligand docking to their active sites provide an insight into the mechanism of enzyme action and enable us to predict the sites of drug metabolism. The review presents the current status of knowledge about the use of the computational approach in studies of ligand-enzyme interactions for CYP1s. Research on the metabolism of substrates and inhibitors of CYP1s and on the selectivity of their action is particularly valuable from the viewpoint of cancer chemoprevention, chemotherapy, and drug-drug interactions.
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Mani R, Natesan V. Chrysin: Sources, beneficial pharmacological activities, and molecular mechanism of action. PHYTOCHEMISTRY 2018; 145:187-196. [PMID: 29161583 DOI: 10.1016/j.phytochem.2017.09.016] [Citation(s) in RCA: 218] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 09/19/2017] [Accepted: 09/21/2017] [Indexed: 05/05/2023]
Abstract
In recent years, public and scientific interest in plant flavonoids has tremendously increased because of their postulated health benefits. This review was mainly focuses on the flavone chrysin (5,7-dihydroxyflavone), which occurs naturally in many plants, honey, and propolis. A number of in vitro and in vivo studies have revealed the therapeutic effects of chrysin against various diseases. In general, chrysin exhibits many biological activities and pharmacological effects, including antioxidant, anti-inflammatory, anticancer, and antiviral activities. Moreover, many studies have reported on the bioavailability of chrysin. Because of its compromised bioavailability and enhanced protein stability, chrysin solid lipid nanoparticle (SLN) synthesis avoids proteolytic degradation and sustained release of drug delivery. To clarify the mechanism of action of chrysin, researchers have investigated the structural binding relationship of chrysin through the docking computation method.
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Affiliation(s)
- Renuka Mani
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, India
| | - Vijayakumar Natesan
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, India.
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Wu J, Feng Y, Han C, Huang W, Shen Z, Yang M, Chen W, Ye L. Germacrone derivatives: synthesis, biological activity, molecular docking studies and molecular dynamics simulations. Oncotarget 2017; 8:15149-15158. [PMID: 28148897 PMCID: PMC5362474 DOI: 10.18632/oncotarget.14832] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/13/2017] [Indexed: 11/25/2022] Open
Abstract
Germacrone is one of the major bioactive components in the Curcuma zedoaria oil product, which is extracted from Curcuma zedoaria Roscoe, known as zedoary. The present study designed some novel germacrone derivatives based on combination principles, synthesized these compounds, and investigated their inhibitions on Bel-7402, HepG2, A549 and HeLa cells. Meanwhile, the study evaluated inhibitions of these derivatives on c-Met kinase, which has been detected in a number of cancers. The results suggested that the majority of the compounds showed stronger inhibitory effect on cancers and c-Met kinase than germacrone. Furthermore, our docking experiments analyzed the results and explained the molecular mechanism. Molecular dynamics simulations were then applied to perform further evaluation of the binding stabilities between compounds and their receptors.
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Affiliation(s)
- Jie Wu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yu Feng
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Chao Han
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Wu Huang
- Inspection and Quarantine Technology Center of Zhanjiang Entry-Exit Inspection and Quarantine Bureau, Zhanjiang 524001, China
| | - Zhibin Shen
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Mengdie Yang
- School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Weiqiang Chen
- School of Basic Courses, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Lianbao Ye
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
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7
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Tan S, Dong Z, Zhang J, Efferth T, Fu Y, Hua X. Cytochrome P450 reaction phenotyping and inhibition and induction studies of pinostrobin in human liver microsomes and hepatocytes. Biomed Chromatogr 2017; 31. [DOI: 10.1002/bmc.3888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 10/24/2016] [Accepted: 11/01/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Shengnan Tan
- Key Laboratory of Forest Plant Ecology, Ministry of Education; Northeast Forestry University; 150040 Harbin PR China
- Engineering Research Center of Forest Bio-preparation, Ministry of Education; Northeast Forestry University; 150040 Harbin PR China
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field, Ministry of Education; Northeast Forestry University; Harbin PR China
| | - Zhimin Dong
- Tianjin Animal Science and Veterinary Research Institute; Tianjin PR China
- Veteria Veterinary Research Institute; Tianjin PR China
| | - Jiashuo Zhang
- College of Life Science; Northeast Forestry University; Harbin PR China
| | - Thomas Efferth
- Department of Pharmaceutical Biology; Institute of Pharmacy, University of Mainz; Mainz Germany
| | - Yujie Fu
- Key Laboratory of Forest Plant Ecology, Ministry of Education; Northeast Forestry University; 150040 Harbin PR China
- Engineering Research Center of Forest Bio-preparation, Ministry of Education; Northeast Forestry University; 150040 Harbin PR China
| | - Xin Hua
- Division of Bacterial Diseases, State Key Laboratory of Veterinary Biotechnology; Harbin Veterinary Research Institute,Chinese Academy of Agricultural Sciences; Harbin PR China
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8
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Ye L, Wu J, Chen W, Feng Y, Shen Z. Novel anti-cancer agents based on germacrone: design, synthesis, biological activity, docking studies and MD simulations. RSC Adv 2017. [DOI: 10.1039/c6ra26944c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Germacrone is a major activity component found in Curcuma zedoaria oil product, which is extracted from Curcuma zedoaria.
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Affiliation(s)
- Lianbao Ye
- Medicinal Chemistry of Department
- Guangdong Pharmaceutical University
- Guangzhou 510006
- China
| | - Jie Wu
- Medicinal Chemistry of Department
- Guangdong Pharmaceutical University
- Guangzhou 510006
- China
| | - Weiqiang Chen
- School of Basic Courses
- Guangdong Pharmaceutical University
- Guangzhou 510006
- China
| | - Yu Feng
- Medicinal Chemistry of Department
- Guangdong Pharmaceutical University
- Guangzhou 510006
- China
| | - Zhibing Shen
- School of Traditional Chinese Medicine
- Guangdong Pharmaceutical University
- Guangzhou
- China
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9
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Chen X, Qiao LS, Cai YL, Zhang YL, Li GY. Combination Computing of Support Vector Machine, Support Vector Regression and Molecular Docking for Potential Cytochrome P450 1A2 Inhibitors. CHINESE J CHEM PHYS 2016. [DOI: 10.1063/1674-0068/29/cjcp1603039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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10
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Nair PC, McKinnon RA, Miners JO. Cytochrome P450 structure–function: insights from molecular dynamics simulations. Drug Metab Rev 2016; 48:434-52. [DOI: 10.1080/03602532.2016.1178771] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Pingili RB, Pawar AK, Challa SR. Systemic exposure of Paracetamol (acetaminophen) was enhanced by quercetin and chrysin co-administration in Wistar rats andin vitromodel: risk of liver toxicity. Drug Dev Ind Pharm 2015; 41:1793-800. [DOI: 10.3109/03639045.2015.1008012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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12
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Khoury GA, Thompson JP, Smadbeck J, Kieslich CA, Floudas CA. Forcefield_PTM: Ab Initio Charge and AMBER Forcefield Parameters for Frequently Occurring Post-Translational Modifications. J Chem Theory Comput 2013; 9:5653-5674. [PMID: 24489522 PMCID: PMC3904396 DOI: 10.1021/ct400556v] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this work, we introduce Forcefield_PTM, a set of AMBER forcefield parameters consistent with ff03 for 32 common post-translational modifications. Partial charges were calculated through ab initio calculations and a two-stage RESP-fitting procedure in an ether-like implicit solvent environment. The charges were found to be generally consistent with others previously reported for phosphorylated amino acids, and trimethyllysine, using different parameterization methods. Pairs of modified and their corresponding unmodified structures were curated from the PDB for both single and multiple modifications. Background structural similarity was assessed in the context of secondary and tertiary structures from the global dataset. Next, the charges derived for Forcefield_PTM were tested on a macroscopic scale using unrestrained all-atom Langevin molecular dynamics simulations in AMBER for 34 (17 pairs of modified/unmodified) systems in implicit solvent. Assessment was performed in the context of secondary structure preservation, stability in energies, and correlations between the modified and unmodified structure trajectories on the aggregate. As an illustration of their utility, the parameters were used to compare the structural stability of the phosphorylated and dephosphorylated forms of OdhI. Microscopic comparisons between quantum and AMBER single point energies along key χ torsions on several PTMs were performed and corrections to improve their agreement in terms of mean squared errors and squared correlation coefficients were parameterized. This forcefield for post-translational modifications in condensed-phase simulations can be applied to a number of biologically relevant and timely applications including protein structure prediction, protein and peptide design, docking, and to study the effect of PTMs on folding and dynamics. We make the derived parameters and an associated interactive webtool capable of performing post-translational modifications on proteins using Forcefield_PTM available at http://selene.princeton.edu/FFPTM.
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Affiliation(s)
- George A. Khoury
- Department of Chemical and Biological Engineering, Princeton, NJ, USA
| | - Jeff P. Thompson
- Department of Chemical and Biological Engineering, Princeton, NJ, USA
| | - James Smadbeck
- Department of Chemical and Biological Engineering, Princeton, NJ, USA
| | - Chris A. Kieslich
- Department of Chemical and Biological Engineering, Princeton, NJ, USA
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13
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Huang YY, Li Z, Cai YH, Feng LJ, Wu Y, Li X, Luo HB. The Molecular Basis for the Selectivity of Tadalafil toward Phosphodiesterase 5 and 6: A Modeling Study. J Chem Inf Model 2013; 53:3044-53. [DOI: 10.1021/ci400458z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yi-You Huang
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Zhe Li
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Ying-Hong Cai
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Ling-Jun Feng
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Yinuo Wu
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Xingshu Li
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Hai-Bin Luo
- School of Pharmaceutical
Sciences, Sun Yat-Sen University, Guangzhou 510006, China
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14
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Zhao P, Chen SK, Cai YH, Lu X, Li Z, Cheng YK, Zhang C, Hu X, He X, Luo HB. The molecular basis for the inhibition of phosphodiesterase-4D by three natural resveratrol analogs. Isolation, molecular docking, molecular dynamics simulations, binding free energy, and bioassay. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1834:2089-96. [PMID: 23871879 DOI: 10.1016/j.bbapap.2013.07.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 06/22/2013] [Accepted: 07/10/2013] [Indexed: 01/26/2023]
Abstract
The phosphodiesterase-4 (PDE4) enzyme is a promising therapeutic target for several diseases. Our previous studies found resveratrol and moracin M to be natural PDE4 inhibitors. In the present study, three natural resveratrol analogs [pterostilbene, (E)-2',3,5',5-tetrahydroxystilbene (THSB), and oxyresveratrol] are structurally related to resveratrol and moracin M, but their inhibition and mechanism against PDE4 are still unclear. A combined method consisting of molecular docking, molecular dynamics (MD) simulations, binding free energy, and bioassay was performed to better understand their inhibitory mechanism. The binding pattern of pterostilbene demonstrates that it involves hydrophobic/aromatic interactions with Phe340 and Phe372, and forms hydrogen bond(s) with His160 and Gln369 in the active site pocket. The present work also reveals that oxyresveratrol and THSB can bind to PDE4D and exhibits less negative predicted binding free energies than pterostilbene, which was qualitatively validated by bioassay (IC50=96.6, 36.1, and 27.0μM, respectively). Additionally, a linear correlation (R(2)=0.953) is achieved for five PDE4D/ligand complexes between the predicted binding free energies and the experimental counterparts approximately estimated from their IC50 values (≈RT ln IC50). Our results imply that hydrophobic/aromatic forces are the primary factors in explaining the mechanism of inhibition by the three products. Results of the study help to understand the inhibitory mechanism of the three natural products, and thus help the discovery of novel PDE4 inhibitors from resveratrol, moracin M, and other natural products.
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Affiliation(s)
- Peng Zhao
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
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15
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Liu J, Taylor SF, Dupart PS, Arnold CL, Sridhar J, Jiang Q, Wang Y, Skripnikova EV, Zhao M, Foroozesh M. Pyranoflavones: a group of small-molecule probes for exploring the active site cavities of cytochrome P450 enzymes 1A1, 1A2, and 1B1. J Med Chem 2013; 56:4082-92. [PMID: 23600958 DOI: 10.1021/jm4003654] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Selective inhibition of P450 enzymes is the key to block the conversion of environmental procarcinogens to their carcinogenic metabolites in both animals and humans. To discover highly potent and selective inhibitors of P450s 1A1, 1A2, and 1B1, as well as to investigate active site cavities of these enzymes, 14 novel flavone derivatives were prepared as chemical probes. Fluorimetric enzyme inhibition assays were used to determine the inhibitory activities of these probes toward P450s 1A1, 1A2, 1B1, 2A6, and 2B1. A highly selective P450 1B1 inhibitor 5-hydroxy-4'-propargyloxyflavone (5H4'FPE) was discovered. Some tested compounds also showed selectivity between P450s 1A1 and 1A2. α-Naphthoflavone-like and 5-hydroxyflavone derivatives preferentially inhibited P450 1A2, while β-naphthoflavone-like flavone derivatives showed selective inhibition of P450 1A1. On the basis of structural analysis, the active site cavity models of P450 enzymes 1A1 and 1A2 were generated, demonstrating a planar long strip cavity and a planar triangular cavity, respectively.
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Affiliation(s)
- Jiawang Liu
- Department of Chemistry, Xavier University of Louisiana , 1 Drexel Drive, New Orleans, Louisiana 70125, USA
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16
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Li Z, Cai YH, Cheng YK, Lu X, Shao YX, Li X, Liu M, Liu P, Luo HB. Identification of Novel Phosphodiesterase-4D Inhibitors Prescreened by Molecular Dynamics-Augmented Modeling and Validated by Bioassay. J Chem Inf Model 2013; 53:972-81. [DOI: 10.1021/ci400063s] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zhe Li
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Ying-Hong Cai
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Yuen-Kit Cheng
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Xiao Lu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Yong-Xian Shao
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Xingshu Li
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Ming Liu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Peiqing Liu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
| | - Hai-Bin Luo
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, PR China
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17
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Moracin M from Morus alba L. is a natural phosphodiesterase-4 inhibitor. Bioorg Med Chem Lett 2012; 22:3261-4. [PMID: 22483586 DOI: 10.1016/j.bmcl.2012.03.026] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Revised: 02/23/2012] [Accepted: 03/07/2012] [Indexed: 12/12/2022]
Abstract
Phosphodiesterase-4 (PDE4) has been identified to be a promising target for treatment of asthma. Moracin M extracted from Chinese herbal drug 'Sang-Bai-Pi' (Morus alba L.) was studied for the inhibitory affinity towards PDE4. It inhibited PDE4D2, PDE4B2, PDE5A1, and PDE9A2 with the IC(50) values of 2.9, 4.5, >40, and >100 μM, respectively. Our molecular docking and 8ns molecular dynamics (MD) simulations demonstrated that moracin M forms three hydrogen bonds with Gln369, Asn321, and Asp318 in the active site and stacks against Phe372. In addition, comparative kinetics analysis of its analog moracin C was carried out to qualitatively validate their inhibitory potency as predicted by the binding free energy calculations after MD simulations.
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18
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The molecular basis for the inhibition of human cytochrome P450 1A2 by oroxylin and wogonin. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2012; 41:297-306. [DOI: 10.1007/s00249-011-0785-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 11/24/2011] [Accepted: 12/06/2011] [Indexed: 01/24/2023]
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19
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Jian TY, He JC, He GH, Feng EF, Li HL, Bai M, Xu GL. Scutellarin inhibits cytochrome P450 isoenzyme 1A2 (CYP1A2) in rats. Phytother Res 2012; 26:1226-30. [PMID: 22228482 DOI: 10.1002/ptr.3723] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 09/22/2011] [Accepted: 11/03/2011] [Indexed: 11/06/2022]
Abstract
Scutellarin is the most important flavone glycoside in the herbal drug Erigeron breviscapus (Vant.) Hand.-Mazz. It is used frequently in the clinic to treat ischemic vascular diseases in China. However, the direct relationship between scutellarin and cytochrome P450 (CYP450) is unclear. The present study investigated the in vitro and in vivo effects of scutellarin on cytochrome P450 1A2 (CYP 1A2) metabolism. According to in vitro experiments, scutellarin (10-250 µM) decreased the formation of 4-acetamidophenol in a concentration-dependent manner, with an IC₅₀ value of 108.20 ± 0.657 µM. Furthermore, scutellarin exhibited a weak mixed-type inhibition against the activity of CYP1A2 in rat liver microsomes, with a K(i) value of 95.2 µM. Whereas in whole animal studies, scutellarin treatment for 7 days (at 5, 15, 30 mg/kg, i.p.) decreased the clearance (CL), and increased the T(1/2) (at 15, 30 mg/kg, i.p.), it did not affect the V(d) of phenacetin. Scutellarin treatment (at 5, 15, 30 mg/kg, i.p.) increased the AUC(0-∞) by 14.3%, 67.3% and 159.2%, respectively. Scutellarin at 30 mg/kg also weakly inhibited CYP1A2 activity, in accordance with our in vitro study. Thus, the results indicate that CYP1A2 is inhibited directly, but weakly, by scutellarin in vivo, and provide useful information on the safe and effective use of scutellarin in clinical practice.
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Affiliation(s)
- Tun-Yu Jian
- Department of Pharmacy, Kunming General Hospital of Chengdu Military Region, 212 Da-Guan Road, Kunming 650032, PR China
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Structural investigation into the inhibitory mechanisms of indomethacin and its analogues towards human glyoxalase I. Bioorg Med Chem Lett 2011; 21:4243-7. [DOI: 10.1016/j.bmcl.2011.05.095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 05/14/2011] [Accepted: 05/20/2011] [Indexed: 11/21/2022]
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