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Miyabe K, Sakai M, Inaba S. Moment analysis method for the determination of permeation kinetics of coumarin at lipid bilayers of liposomes by using capillary electrophoresis. Electrophoresis 2024. [PMID: 39329504 DOI: 10.1002/elps.202400100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 08/03/2024] [Accepted: 08/18/2024] [Indexed: 09/28/2024]
Abstract
A method was developed for studying mass transfer kinetics at lipid bilayers of liposomes. Elution peaks of coumarin were measured by liposome electrokinetic chromatography (LEKC). Four types of phospholipids having different alkyl chains were used for preparing liposomes, which were used as pseudo-stationary phases in LEKC systems. Rate constants of permeation across lipid bilayers of liposomes or of adsorption at lipid membranes were determined by analyzing the first absolute and second central moments of the elution peaks measured by LEKC. The rate constants of permeation or adsorption tend to decrease with an increase in the carbon number of the alkyl chains of phospholipids. It was demonstrated that the moment analysis of elution peak profiles measured by LEKC is effective for determining lipid membrane permeability or adsorption kinetics. Compared with other conventional techniques, the method has some advantages for studying mass transfer kinetics at lipid bilayers. Solute permeation across or solute adsorption at real lipid bilayers of liposomes is analyzed. The principle of the method is the analysis of separation behavior in LEKC, which is different from that of the other ones. It is expected that the method contributes to the kinetic study of mass transfer at lipid bilayers from various perspectives.
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Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University, Toshima-ku, Tokyo, Japan
| | - Mio Sakai
- Department of Chemistry, Faculty of Science, Rikkyo University, Toshima-ku, Tokyo, Japan
| | - Shunta Inaba
- Department of Chemistry, Faculty of Science, Rikkyo University, Toshima-ku, Tokyo, Japan
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2
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Pinto D, Lozano-Castellón J, Margarida Silva A, de la Luz Cádiz-Gurrea M, Segura-Carretero A, Lamuela-Raventós R, Vallverdú-Queralt A, Delerue-Matos C, Rodrigues F. Novel insights into enzymes inhibitory responses and metabolomic profile of supercritical fluid extract from chestnut shells upon intestinal permeability. Food Res Int 2024; 175:113807. [PMID: 38129012 DOI: 10.1016/j.foodres.2023.113807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/21/2023] [Accepted: 12/02/2023] [Indexed: 12/23/2023]
Abstract
The health benefits of chestnut (Castanea sativa) shells (CSs) have been ascribed to phytochemicals, mainly phenolic compounds. Nevertheless, an exhaustive assessment of their intestinal absorption is vital considering a possible nutraceutical application. This study evaluated the bioactivity of CSs extract prepared by Supercritical Fluid Extraction and untargeted metabolomic profile upon in-vitro intestinal permeation across a Caco-2/HT29-MTX co-culture model. The results demonstrated the neuroprotective, hypoglycemic, and hypolipidemic properties of CSs extract by inhibition of acetylcholinesterase, α-amylase, and lipase activities. The untargeted metabolic profiling by LC-ESI-LTQ-Orbitrap-MS unveiled almost 60 % of lipids and 30 % of phenolic compounds, with 29 metabolic pathways indicated by enrichment analysis. Among phenolics, mostly phenolic acids, flavonoids, and coumarins permeated the intestinal barrier with most metabolites arising from phase I reactions (reduction, hydrolysis, and hydrogenation) and a minor fraction from phase II reactions (methylation). The permeation rates enhanced in the following order: ellagic acid < o-coumaric acid < p-coumaric acid < ferulaldehyde ≤ hydroxyferulic acid ≤ dihydroferulic acid < ferulic acid < trans-caffeic acid < trans-cinnamic acid < dihydrocaffeic acid, with better outcomes for 1000 µg/mL of extract concentration and after 4 h of permeation. Taken together, these findings sustained a considerable in-vitro intestinal absorption of phenolic compounds from CSs extract, enabling them to reach target sites and exert their biological effects.
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Affiliation(s)
- Diana Pinto
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
| | - Julián Lozano-Castellón
- Nutrition, Food Science and Gastronomy Department, School of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain; Consorcio CIBER, M.P. Fisiopatología de la Obesidad y la Nutrición (CIBERObn), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Ana Margarida Silva
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
| | - María de la Luz Cádiz-Gurrea
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain
| | - Antonio Segura-Carretero
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain
| | - Rosa Lamuela-Raventós
- Nutrition, Food Science and Gastronomy Department, School of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain; Consorcio CIBER, M.P. Fisiopatología de la Obesidad y la Nutrición (CIBERObn), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Anna Vallverdú-Queralt
- Nutrition, Food Science and Gastronomy Department, School of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain; Consorcio CIBER, M.P. Fisiopatología de la Obesidad y la Nutrición (CIBERObn), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain.
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
| | - Francisca Rodrigues
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal.
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3
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Miyabe K, Inaba S, Umeda M. A study on attempt for determination of permeation kinetics of coumarin at lipid bilayer of liposomes by using capillary electrophoresis with moment analysis theory. J Chromatogr A 2023; 1687:463691. [PMID: 36542884 DOI: 10.1016/j.chroma.2022.463691] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/14/2022] [Accepted: 11/28/2022] [Indexed: 11/30/2022]
Abstract
It was tried to develop a moment analysis method for the determination of lipid membrane permeability. The first absolute and second central moments of elution peaks measured by liposome electrokinetic chromatography (LEKC) are analyzed by using moment equations. As a concrete example, elution peak profiles of coumarin in a LEKC system, in which liposomes consisting of 1-palmitoyl-2-oleoyl-sn‑glycero-3-phosphocholine (POPC) and phosphatidylserine (PS) are used as a pseudo-stationary phase, were analyzed. It seems that lipid membrane permeability of coumarin across the lipid bilayer of POPC/PS liposomes was measured by the moment analysis method because previous permeability measurements using parallel artificial membrane permeability assay (PAMPA) and Caco-2 cells indicated that coumarin is permeable across lipid bilayer. However, it was also pointed out that the moment analysis method with LEKC is not effective for the determination of lipid membrane permeability and that it provides information about adsorption/desorption kinetics at lipid bilayer of liposomes. Therefore, different moment equations were also developed for the determination of adsorption/desorption rate constants of coumarin from the LEKC data. It was demonstrated that permeation rate constants at lipid bilayer or adsorption/desorption rate constants can be determined from the LEKC data on the basis of moment analysis theory for the mass transfer phenomena of coumarin at the lipid bilayer of POPC/PS liposomes. Mass transfer kinetics of solutes at lipid bilayer should be determined under the conditions that liposomes originally be because they are self-assembling and dynamic systems formed through weak interactions between phospholipid monomers. The moment analysis method using LEKC is effective for the experimental determination of the mass transfer rate constants at the lipid bilayer of liposomes because neither immobilization nor chemical modification of liposomes is necessary when LEKC data are measured. It is expected that the results of this study contribute to the dissemination of an opportunity for the determination of permeation rate constants or adsorption/desorption rate constants at the lipid bilayer of liposomes to many researchers because capillary electrophoresis is widespread.
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Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshimaku, Tokyo 171-8501, Japan.
| | - Shunta Inaba
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshimaku, Tokyo 171-8501, Japan
| | - Momoko Umeda
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshimaku, Tokyo 171-8501, Japan
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4
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New Copper(I) Complex with a Coumarin as Ligand with Antibacterial Activity against Flavobacterium psychrophilum. Molecules 2020; 25:molecules25143183. [PMID: 32668579 PMCID: PMC7397040 DOI: 10.3390/molecules25143183] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/08/2020] [Accepted: 07/10/2020] [Indexed: 11/26/2022] Open
Abstract
A new copper (I) complex, [Cu(NN1)2](ClO4), was synthesized, where NN1 was a imine ligand 6-((quinolin-2-ylmethylene)amino)-2H-chromen-2-one obtained by a derivatization of natural compound coumarin. The structural characterization in solution was done by NMR techniques, UV-Vis and cyclic voltammetry. The potential antibacterial effect of [Cu(NN1)2](ClO4), was assessed for F. psychrophilum isolated 10094. F. psychrophilum is a Gram-negative bacterium which causes diseases such as bacterial cold-water disease and rainbow trout fry syndrome, causing large economic losses in the freshwater salmonid aquaculture industry. This complex show to have antibacterial activity against F. psychrophilum 10094 at non-cytotoxic concentration in cell line derived from trout (F. psychrophilum 10094 IC50 16.0 ± 0.9; RT-GUT IC50 53.0 ± 3.1 µg/mL).
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5
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Beyer SF, Beesley A, Rohmann PF, Schultheiss H, Conrath U, Langenbach CJ. The Arabidopsis non-host defence-associated coumarin scopoletin protects soybean from Asian soybean rust. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:397-413. [PMID: 31148306 PMCID: PMC6852345 DOI: 10.1111/tpj.14426] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 05/13/2019] [Accepted: 05/20/2019] [Indexed: 05/10/2023]
Abstract
The fungus Phakopsora pachyrhizi (Pp) causes Asian soybean rust (SBR) disease which provokes tremendous losses in global soybean production. Pp is mainly controlled with synthetic fungicides to which the fungus swiftly develops fungicide resistance. To substitute or complement synthetic fungicides in Asian soybean rust control, we aimed to identify antifungal metabolites in Arabidopsis which is not a host for Pp. Comparative transcriptional and metabolic profiling of the Pp-inoculated Arabidopsis non-host and the soybean host revealed induction of phenylpropanoid metabolism-associated genes in both species but activation of scopoletin biosynthesis only in the resistant non-host. Scopoletin is a coumarin and an antioxidant. In vitro experiments disclosed fungistatic activity of scopoletin against Pp, associated with reduced accumulation of reactive oxygen species (ROS) in fungal pre-infection structures. Non-antioxidant and antioxidant molecules including coumarins with a similar structure to scopoletin were inactive or much less effective at inhibiting fungal accumulation of ROS and germination of Pp spores. When sprayed onto Arabidopsis leaves, scopoletin also suppressed the formation of Pp pre-infection structures and penetration of the plant. However, scopoletin neither directly activated defence nor did it prime Arabidopsis for enhanced defence, therefore emphasizing fungistatic activity as the exclusive mode of action of scopoletin against Pp. Because scopletin also protected soybean from Pp infection, the coumarin may serve as a natural fungicide or as a lead for the development of near-to-nature fungicides against Asian soybean rust.
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Affiliation(s)
| | - Alexander Beesley
- Department of Plant PhysiologyRWTH Aachen UniversityAachen52074Germany
| | | | - Holger Schultheiss
- Agricultural CenterBASF Plant Science Company GmbHLimburgerhof67117Germany
| | - Uwe Conrath
- Department of Plant PhysiologyRWTH Aachen UniversityAachen52074Germany
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Synthesis and Structure-Activity Relationship of Daphnetin Derivatives as Potent Antioxidant Agents. Molecules 2018; 23:molecules23102476. [PMID: 30262732 PMCID: PMC6222747 DOI: 10.3390/molecules23102476] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 09/23/2018] [Accepted: 09/26/2018] [Indexed: 01/17/2023] Open
Abstract
In this study, daphnetin 1 was chosen as the lead compound, and C-3 or C-4-substituted daphnetins were designed and synthesized to explore the potential relationship between the antioxidant activities and the chemical structures of daphnetin derivatives. The antioxidant activities of the generated compounds were evaluated utilizing the free radical scavenging effect on 2,2'-diphenyl-1-picrylhydrazyl, 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonate) cation, and the ferric reducing power assays, and were then compared with those of the standard antioxidant Trolox. The results showed that the catechol group was the key pharmacophore for the antioxidant activity of the daphnetins. The introduction of an electron-withdrawing hydrophilic group at the C-4 position of daphnetin enhanced the antioxidative capacity, but this trend was not observed for C-3 substitution. In addition, introduction of a a hydrophobic phenyl group exerted negative effects on the antioxidant activity in both the C-3 and C-4 substitutions. Among all of the derivatives tested, the most powerful antioxidant was 4-carboxymethyl daphnetin (compound 9), for which the strongest antioxidant activity was observed in all of the assays. In addition, compound 9 also displayed strong pharmaceutical properties in the form of metabolic stability. To summarize, compound 9 holds great potential to be developed as an antioxidant agent with excellent antioxidant activity and proper pharmacokinetic behavior.
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7
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Xia YL, Dou TY, Liu Y, Wang P, Ge GB, Yang L. In vitro evaluation of the effect of C-4 substitution on methylation of 7,8-dihydroxycoumarin: metabolic profile and catalytic kinetics. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171271. [PMID: 29410835 PMCID: PMC5792912 DOI: 10.1098/rsos.171271] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 11/24/2017] [Indexed: 06/08/2023]
Abstract
Daphnetin (7,8-dihydroxycoumarin (7,8-DHC)) and its C-4 derivatives have multiple pharmacological activities, but the poor metabolic stability of these catechols has severely restricted their application in the clinic. Methylation plays important roles in catechol elimination, although thus far the effects of structural modifications on the metabolic selectivity and the catalytic efficacy of human catechol-O-methyltransferase (COMT) remain unclear. This study was aimed at exploring the structure-methylation relationship of daphnetin and its C-4 derivatives, including 4-methyl, 4-phenyl and 4-acetic acid daphnetin. It was achieved by identifying the methylated products generated and by careful characterization of the reaction kinetics. These catechols are selectively metabolized to the corresponding 8-O-methyl conjugates, and this regioselective methylation could be elucidated by flexible docking, in which all the 8-OH groups of these catechols are much closer than the 7-OH groups to catalytic residue LYS144 and methyl donor AdoMet. The results of the kinetic analyses revealed that the Clint values of the compounds could be strongly affected by the C-4 substitutions, which could be partially explained by the electronic effects of the C-4 substituents and the coordination modes of 7,8- dihydroxycoumarins in the active site of COMT. These findings provide helpful guidance for further structural modification of 7,8-DHCs to improve metabolic stability.
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Affiliation(s)
- Yang-Liu Xia
- Laboratory of Pharmacology & Toxicology, School of Life Science and Medicine, Dalian University of Technology, Panjin 124221, People's Republic of China
| | - Tong-Yi Dou
- Laboratory of Pharmacology & Toxicology, School of Life Science and Medicine, Dalian University of Technology, Panjin 124221, People's Republic of China
| | - Yong Liu
- Laboratory of Pharmacology & Toxicology, School of Life Science and Medicine, Dalian University of Technology, Panjin 124221, People's Republic of China
| | - Ping Wang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicines, Shanghai 201203, People's Republic of China
| | - Guang-Bo Ge
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicines, Shanghai 201203, People's Republic of China
| | - Ling Yang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicines, Shanghai 201203, People's Republic of China
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8
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Amin KM, Taha AM, George RF, Mohamed NM, Elsenduny FF. Synthesis, antitumor activity evaluation, and DNA-binding study of coumarin-based agents. Arch Pharm (Weinheim) 2017; 351. [DOI: 10.1002/ardp.201700199] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 10/30/2017] [Accepted: 10/31/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Kamilia M. Amin
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Cairo University; Cairo Egypt
| | - Aly M. Taha
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Modern University for Technology and Information MTI; Cairo Egypt
| | - Riham F. George
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Cairo University; Cairo Egypt
| | - Nada M. Mohamed
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Modern University for Technology and Information MTI; Cairo Egypt
| | - Fardous F. Elsenduny
- Biochemistry Division, Faculty of Science, Department of Chemistry; Mansoura University; Mansoura Egypt
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9
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Synthesis and biological evaluation of hydroxylcoumarin derivatives as antioxidant agents. Chem Res Chin Univ 2017. [DOI: 10.1007/s40242-017-6411-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Cárdenas PA, Kratz JM, Hernández A, Costa GM, Ospina LF, Baena Y, Simões CMO, Jimenez-Kairuz Á, Aragon M. In vitro intestinal permeability studies, pharmacokinetics and tissue distribution of 6-methylcoumarin after oral and intraperitoneal administration in Wistar rats. BRAZ J PHARM SCI 2017. [DOI: 10.1590/s2175-97902017000116081] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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11
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Zhang Z, Sun Q, Xia C, Sun W. CO 2 as a C1 Source: B(C 6F 5) 3-Catalyzed Cyclization of o-Phenylene-diamines To Construct Benzimidazoles in the Presence of Hydrosilane. Org Lett 2016; 18:6316-6319. [PMID: 27978659 DOI: 10.1021/acs.orglett.6b03030] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The catalytic construction of benzimidazoles using CO2 as a carbon source represents a facile and sustainable approach to obtaining these valuable compounds. Herein, we describe the B(C6F5)3-catalyzed synthesis of benzimidazoles via cyclization of o-phenylenediamines with CO2 and PhSiH3. This metal-free catalytic route achieves the desired products in high yield under convenient reaction conditions and is applicable to a broad substrate scope. A plausible mechanism for the reaction involving a frustrated Lewis pair pathway is proposed based on spectroscopic characterization (e.g., 13C NMR) of the reaction intermediates.
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Affiliation(s)
- Zhenbei Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences , Lanzhou 730000, P. R. China.,University of Chinese Academy of Sciences , Beijing 100049, P. R. China
| | - Qiangsheng Sun
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences , Lanzhou 730000, P. R. China
| | - Chungu Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences , Lanzhou 730000, P. R. China
| | - Wei Sun
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences , Lanzhou 730000, P. R. China
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12
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Barot KP, Jain SV, Kremer L, Singh S, Ghate MD. Recent advances and therapeutic journey of coumarins: current status and perspectives. Med Chem Res 2015. [DOI: 10.1007/s00044-015-1350-8] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Xia YL, Ge GB, Wang P, Liang SC, He YQ, Ning J, Qian XK, Li Y, Yang L. Structural modifications at the C-4 position strongly affect the glucuronidation of 6,7-dihydroxycoumarins. Drug Metab Dispos 2015; 43:553-60. [PMID: 25626951 DOI: 10.1124/dmd.114.060681] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Esculetin (6,7-dihydroxycoumarin) and its C-4 derivatives have multiple pharmacologic activities, but the poor metabolic stability of these catechols has severely restricted their application in the clinic. Glucuronidation plays important roles in catechols elimination, although thus far the effects of structural modifications on the metabolic selectivity and the catalytic efficacy of the human UDP-glucuronosyltransferase (UGT) enzymes remain unclear. This study was aimed at exploring the structure-glucuronidation relationship of esculetin and its C-4 derivatives, including 4-methyl esculetin, 4-phenyl esculetin, and 4-hydroxymethyl esculetin as well as 4-acetic acid esculetin. It was achieved by identifying the main human UGTs responsible for the different reactions and by careful characterization of the reactions kinetics. These catechols, with the exception of 4-acetic acid esculetin, are selectively metabolized to the corresponding 7-O-glucuronides. UGT1A6 and UGT1A9 are the two major UGTs involved in the 7-O-glucuronidation of 4-methyl esculetin and esculetin. UGT1A6 was the major contributor for 7-O-glucuronidation of 4-hydroxymethyl esculetin, and UGT1A9 played a significant role in the 7-O-glucuronidation of 4-phenyl esculetin. The results of the kinetic analyses revealed that the Km values of the compounds, in both UGT1A9 and human liver microsomes, decreased with increasing hydrophobicity of the C-4 substitutions. The outcome of this was that C-4 hydrophobic and hydrophilic groups on 6,7-dihydroxycoumarin exhibited contrasting effects on UGT affinity. All of these findings provide helpful guidance for further structural modification of 6,7-dihydroxycoumarins with improved metabolic stability.
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Affiliation(s)
- Yang-Liu Xia
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Guang-Bo Ge
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Ping Wang
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Si-Cheng Liang
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Yu-Qi He
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Jing Ning
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Xing-Kai Qian
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Yan Li
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
| | - Ling Yang
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian (Y.-L.X., G.-B.G., P.W., S.-C.L.,Y.-Q.H., J.N., X.-K.Q., Y.L., L.Y.); University of Chinese Academy of Sciences, Beijing (Y.-L.X., S.-C.L.); Dalian Medical University, Dalian (J.N., X.-K.Q.), People's Republic of China
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14
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Wang P, Xia YL, Yu Y, Lu JX, Zou LW, Feng L, Ge GB, Yang L. Design, synthesis and biological evaluation of esculetin derivatives as anti-tumour agents. RSC Adv 2015. [DOI: 10.1039/c5ra06070b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Introduction of a nitrogen containing group as hydrogen bond acceptor is a useful strategy for the structure modification.
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Affiliation(s)
- Ping Wang
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Yang-Liu Xia
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Yang Yu
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Jun-Xia Lu
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Li-Wei Zou
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Lei Feng
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Guang-Bo Ge
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Ling Yang
- Laboratory of Pharmaceutical Resource Discovery
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
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15
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Zaugg J, Eickmeier E, Rueda DC, Hering S, Hamburger M. HPLC-based activity profiling of Angelica pubescens roots for new positive GABAA receptor modulators in Xenopus oocytes. Fitoterapia 2010; 82:434-40. [PMID: 21147202 DOI: 10.1016/j.fitote.2010.12.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Revised: 11/30/2010] [Accepted: 12/02/2010] [Indexed: 10/18/2022]
Abstract
A petroleum ether extract of the traditional Chinese herbal drug Duhuo (roots of Angelica pubescens Maxim. f. biserrata Shan et Yuan), showed significant activity in a functional two-microelectrode voltage clamp assay with Xenopus oocytes which expressed recombinant γ-aminobutyric acid type A (GABA(A)) receptors of the subtype α(1)β(2)γ(2S). HPLC-based activity profiling of the active extract revealed six compounds responsible for the GABA(A) receptor modulating activity. They were identified by microprobe NMR and high resolution mass spectrometry as columbianetin acetate (1), imperatorin (3), cnidilin (4), osthol (5), and columbianedin (6). In concentration-dependent experiments, osthol and cnidilin showed the highest potentiation of the GABA induced chloride current (273.6%±39.4% and 204.5%±33.2%, respectively at 300 μM). Bisabolangelone (2) only showed minor activity at the GABA(A) receptor. The example demonstrates that HPLC-based activity profiling is a simple and efficient method to rapidly identify GABA(A) receptor modulators in a bioactive plant extract.
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Affiliation(s)
- Janine Zaugg
- Institute of Pharmaceutical Biology, University of Basel, Basel, Switzerland
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