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Shen LA, Peng X, Bao Y, Liu C, Zhang H, Li J, Zhu D, Zhang Q. Design, synthesis and biological evaluation of quercetin derivatives as novel β-catenin/B-cell lymphoma 9 protein-protein interaction inhibitors. Eur J Med Chem 2023; 247:115075. [PMID: 36599228 DOI: 10.1016/j.ejmech.2022.115075] [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: 09/17/2022] [Revised: 12/08/2022] [Accepted: 12/29/2022] [Indexed: 01/02/2023]
Abstract
The β-catenin/B-cell lymphoma 9 (BCL9) protein-protein interaction (PPI) is a potential target for the suppression of hyperactive Wnt/β-catenin signaling that is vigorously involved in cancer initiation and development. Herein, we first described quercetin and its derivatives had potential inhibitory effects on β-catenin/BCL9 PPI. The most potent compound, quercetin-3'-O-(4-methylpiperazine-1-yl) propyl (C1), directly binded with β-catenin and disrupted the β-catenin/BCL9 interaction in both the protein level and the cellular context. C1 also effectively inhibited colorectal cancer in vitro and showed better selectivity in inhibiting hyperactive Wnt/β-catenin signaling cells like CT26 and HCT116. And we further confirmed that C1 could inhibit CT26 tumor growth in vivo and regulate the tumor immune microenvironment. This study provides a good chemical probe to explore β-catenin-related biology and a drug-like quercetin derivative as novel β-catenin/BCL9 PPI inhibitors for further drug development.
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Affiliation(s)
- Li-An Shen
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Xinyan Peng
- Novel Technology Center of Pharmaceutical Chemistry, Shanghai Institute of Pharmaceutical Industry Co., Ltd., China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Ya Bao
- Novel Technology Center of Pharmaceutical Chemistry, Shanghai Institute of Pharmaceutical Industry Co., Ltd., China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Chenglong Liu
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Hao Zhang
- School of Pharmacy, Fudan University, Shanghai, 201203, China; Novel Technology Center of Pharmaceutical Chemistry, Shanghai Institute of Pharmaceutical Industry Co., Ltd., China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Jianqi Li
- Novel Technology Center of Pharmaceutical Chemistry, Shanghai Institute of Pharmaceutical Industry Co., Ltd., China State Institute of Pharmaceutical Industry, Shanghai, 201203, China
| | - Di Zhu
- School of Pharmacy, Fudan University, Shanghai, 201203, China; Department of Pharmacology, School of Basic Medical Science, Fudan University, Shanghai, 201100, China.
| | - Qingwei Zhang
- Novel Technology Center of Pharmaceutical Chemistry, Shanghai Institute of Pharmaceutical Industry Co., Ltd., China State Institute of Pharmaceutical Industry, Shanghai, 201203, China.
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Lin D, Jiang S, Zhang A, Wu T, Qian Y, Shao Q. Structural derivatization strategies of natural phenols by semi-synthesis and total-synthesis. NATURAL PRODUCTS AND BIOPROSPECTING 2022; 12:8. [PMID: 35254538 PMCID: PMC8901917 DOI: 10.1007/s13659-022-00331-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/15/2022] [Indexed: 05/08/2023]
Abstract
Structural derivatization of natural products has been a continuing and irreplaceable source of novel drug leads. Natural phenols are a broad category of natural products with wide pharmacological activity and have offered plenty of clinical drugs. However, the structural complexity and wide variety of natural phenols leads to the difficulty of structural derivatization. Skeleton analysis indicated most types of natural phenols can be structured by the combination and extension of three common fragments containing phenol, phenylpropanoid and benzoyl. Based on these fragments, the derivatization strategies of natural phenols were unified and comprehensively analyzed in this review. In addition to classical methods, advanced strategies with high selectivity, efficiency and practicality were emphasized. Total synthesis strategies of typical fragments such as stilbenes, chalcones and flavonoids were also covered and analyzed as the supplementary for supporting the diversity-oriented derivatization of natural phenols.
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Affiliation(s)
- Ding Lin
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China.
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China.
| | - Senze Jiang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Ailian Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Tong Wu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Yongchang Qian
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Qingsong Shao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China.
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China.
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3
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Darsandhari S, Dhakal D, Shrestha B, Lee S, Jung N, Jung HJ, Sohng JK. Biosynthesis of bioactive tamarixetin in recombinant Escherichia coli. Biotechnol Appl Biochem 2020; 68:531-537. [PMID: 32430989 DOI: 10.1002/bab.1958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 12/25/2018] [Indexed: 11/08/2022]
Abstract
Tamarixetin, a monomethylated derivative of quercetin, has been reported to possess many important biological activities. In the present study, a whole cell biotransformation system was used for regiospecific methylation of quercetin to produce 4'-O-methylated quercetin (tamarixetin) using methyltransferase from Streptomyces sp. KCTC 0041BP in Escherichia coli Bl21 (DE3). Its production was enhanced by adding a plasmid containing S-adenosine-l-methionine (SAM) synthase from E. coli K12 (MetK) with subsequent feeding of l-methionine and glycerol in the culture. The best condition produced ∼279 μM (88.2 mg/L) of tamarixetin. The biological activity of tamarixetin was tested and compared with quercetin, 7-O-methylated quercetin, and 3-O-methylated quercetin. Results showed that the growth of all tested cancer cell lines (AGS, B16F10, C6, and HeLa) were inhibited by tamarixetin more effectively than other methylated derivatives of quercetin or quercetin. Tamarixetin also exhibited the best antimelanogenic activity among all compounds tested.
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Affiliation(s)
- Sumangala Darsandhari
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
| | - Dipesh Dhakal
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
| | - Biplav Shrestha
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
| | - Sanghun Lee
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
| | - Narae Jung
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
| | - Hye Jin Jung
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
| | - Jae Kyung Sohng
- Department of Life Science and Biochemical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea.,Department of BT-Convergent Pharmaceutical Engineering, SunMoon University, Asan-si, Chungnam, Republic of Korea
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5
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Zheng Z, Han Z, Cai L, Zhou D, Chavis BR, Li C, Sui Q, Jiang K, Gao Q. Highly regioselective dehexanoylation in fully hexanoylated flavonoids. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Selective synthesis of 7- O -substituted luteolin derivatives and their melanonenesis and proliferation inhibitory activity in B16 melanoma cells. Bioorg Med Chem Lett 2018; 28:2518-2522. [DOI: 10.1016/j.bmcl.2018.05.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/25/2018] [Accepted: 05/26/2018] [Indexed: 11/20/2022]
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Tsafack BT, Bomgning CLK, Kühlborn J, Fouedjou RT, Ponou BK, Teponno RB, Fotio AL, Barboni L, Opatz T, Nguelefack TB, Tapondjou LA. Protective Effects of Extracts, Isolated Compounds from <i>Desmodium uncinatum</i> and Semi-Synthetic Isovitexin Derivatives against Lipid Peroxidation of Hepatocyte’s Membranes. ACTA ACUST UNITED AC 2018. [DOI: 10.4236/abc.2018.86009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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Quercetin/oleic acid-based G-protein-coupled receptor 40 ligands as new insulin secretion modulators. Future Med Chem 2017; 9:1873-1885. [DOI: 10.4155/fmc-2017-0113] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Aim: Management of Type 2 diabetes mellitus by diet is achievable at the early stage of the disease; patients usually underestimate this approach and an appropriate drug therapy is required. Results: Starting from quercetin and oleic acid, that have effect on insulin secretion, a small set of hybrid molecules was synthesized. Insulin secretion was evaluated in both in vitro and ex vivo models. AV1 was able to enhance insulin secretion dose dependently, behaving as a conceivable agonist of G-protein-coupled receptor 40. Conclusion: AV1 represents an interesting tool that interacts with G-protein-coupled receptor 40. Further studies will be carried out to evaluate the exact binding mode, and also to enlarge the library of these antidiabetic agents. [Formula: see text]
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Chatzikonstantinou AV, Chatziathanasiadou MV, Ravera E, Fragai M, Parigi G, Gerothanassis IP, Luchinat C, Stamatis H, Tzakos AG. Enriching the biological space of natural products and charting drug metabolites, through real time biotransformation monitoring: The NMR tube bioreactor. Biochim Biophys Acta Gen Subj 2017; 1862:1-8. [PMID: 28974426 DOI: 10.1016/j.bbagen.2017.09.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 09/26/2017] [Accepted: 09/29/2017] [Indexed: 12/28/2022]
Abstract
BACKGROUND Natural products offer a wide range of biological activities, but they are not easily integrated in the drug discovery pipeline, because of their inherent scaffold intricacy and the associated complexity in their synthetic chemistry. Enzymes may be used to perform regioselective and stereoselective incorporation of functional groups in the natural product core, avoiding harsh reaction conditions, several protection/deprotection and purification steps. METHODS Herein, we developed a three step protocol carried out inside an NMR-tube. 1st-step: STD-NMR was used to predict the: i) capacity of natural products as enzyme substrates and ii) possible regioselectivity of the biotransformations. 2nd-step: The real-time formation of multiple-biotransformation products in the NMR-tube bioreactor was monitored in-situ. 3rd-step: STD-NMR was applied in the mixture of the biotransformed products to screen ligands for protein targets. RESULTS Herein, we developed a simple and time-effective process, the "NMR-tube bioreactor", that is able to: (i) predict which component of a mixture of natural products can be enzymatically transformed, (ii) monitor in situ the transformation efficacy and regioselectivity in crude extracts and multiple substrate biotransformations without fractionation and (iii) simultaneously screen for interactions of the biotransformation products with pharmaceutical protein targets. CONCLUSIONS We have developed a green, time-, and cost-effective process that provide a simple route from natural products to lead compounds for drug discovery. GENERAL SIGNIFICANSE This process can speed up the most crucial steps in the early drug discovery process, and reduce the chemical manipulations usually involved in the pipeline, improving the environmental compatibility.
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Affiliation(s)
- Alexandra V Chatzikonstantinou
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece; Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece
| | - Maria V Chatziathanasiadou
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Enrico Ravera
- Magnetic Resonance Center (CERM), University of Florence and Interuniversity Consortium for Magnetic Resonance in MetalloProteins (CIRMMP), 50019 Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino, Italy
| | - Marco Fragai
- Magnetic Resonance Center (CERM), University of Florence and Interuniversity Consortium for Magnetic Resonance in MetalloProteins (CIRMMP), 50019 Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino, Italy
| | - Giacomo Parigi
- Magnetic Resonance Center (CERM), University of Florence and Interuniversity Consortium for Magnetic Resonance in MetalloProteins (CIRMMP), 50019 Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino, Italy
| | - Ioannis P Gerothanassis
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Claudio Luchinat
- Magnetic Resonance Center (CERM), University of Florence and Interuniversity Consortium for Magnetic Resonance in MetalloProteins (CIRMMP), 50019 Sesto Fiorentino, Italy; Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino, Italy
| | - Haralambos Stamatis
- Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece
| | - Andreas G Tzakos
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece.
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Docampo M, Olubu A, Wang X, Pasinetti G, Dixon RA. Glucuronidated Flavonoids in Neurological Protection: Structural Analysis and Approaches for Chemical and Biological Synthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7607-7623. [PMID: 28789524 PMCID: PMC5954986 DOI: 10.1021/acs.jafc.7b02633] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Both plant and mammalian cells express glucuronosyltransferases that catalyze glucuronidation of polyphenols such as flavonoids and other small molecules. Oral administration of select polyphenolic compounds leads to the accumulation of the corresponding glucuronidated metabolites at μM and sub-μM concentrations in the brain, associated with amelioration of a range of neurological symptoms. Determining the mechanisms whereby botanical extracts impact cognitive wellbeing and psychological resiliency will require investigation of the modes of action of the brain-targeted metabolites. Unfortunately, many of these compounds are not commercially available. This article describes the latest approaches for the analysis and synthesis of glucuronidated flavonoids. Synthetic schemes include both standard organic synthesis, semisynthesis, enzymatic synthesis and use of synthetic biology utilizing heterologous enzymes in microbial platform organisms.
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Affiliation(s)
- Maite Docampo
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, TX, USA
| | - Adiji Olubu
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, TX, USA
| | - Xiaoqiang Wang
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, TX, USA
| | - Giulio Pasinetti
- Department of Psychiatry, The Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1230, New York, NY 10029, USA
| | - Richard A Dixon
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, TX, USA
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11
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Kimura Y, Kato R, Oyama KI, Kondo T, Yoshida K. Efficient Preparation of Various O-Methylquercetins by Selective Demethylation. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
penta-O-Methylquercetin (2) was prepared by permethylation of quercetin (1). Selective demethylation of 2 using either BBr3 or BCl3/TBAI ( tetra-butylammonium iodide) gave five O-methylquercetins (3-6), with satisfactory yields. The reaction can be easily scaled-up. We established an efficient and large-scale preparation of O-methylquercetins.
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Affiliation(s)
- Yuki Kimura
- Graduate School of Information Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Ryo Kato
- Graduate School of Information Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Kin-ichi Oyama
- Chemical Instrumentation Facility, Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Tadao Kondo
- Graduate School of Information Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Kumi Yoshida
- Graduate School of Information Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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12
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Synthesis and biological evaluation of methylated scutellarein analogs based on metabolic mechanism of scutellarin in vivo. Eur J Med Chem 2015; 106:95-105. [PMID: 26523667 DOI: 10.1016/j.ejmech.2015.10.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/10/2015] [Accepted: 10/22/2015] [Indexed: 11/22/2022]
Abstract
Scutellarin (1) could be hydrolyzed into scutellarein (2) in vivo and then converted into methylated, sulfated and glucuronidated forms. In order to investigate the biological activities of these methylated metabolites, eight methylated analogs of scutellarein (2) were synthesized via semi-synthetic methods. The antithrombotic activities of these compounds were evaluated through the analyzation of prothrombin time (PT), activated partial thromboplastin time (APTT), thrombin time (TT) and fibrinogen (FIB). Their antioxidant activities were assessed by measuring their scavenging capacities toward 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) and the ability to protect PC12 cells against H2O2-induced cytotoxicity. Furthermore, the physicochemical properties of these compounds including aqueous solubility and lipophilicity were also investigated. The results showed that 6-O-methylscutellarein (5) demonstrated potent antithrombotic activity, stronger antioxidant activity and balanced solubility and permeability compared with scutellarin (1), which warrants further development of 5 as a promising lead for the treatment of ischemic cerebrovascular disease.
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Shi ZH, Li NG, Tang YP, Shi QP, Zhang W, Zhang PX, Dong ZX, Li W, Zhang X, Fu HA, Duan JA. Synthesis, biological evaluation and SAR analysis of O -alkylated analogs of quercetin for anticancer. Bioorg Med Chem Lett 2014; 24:4424-4427. [DOI: 10.1016/j.bmcl.2014.08.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 07/20/2014] [Accepted: 08/04/2014] [Indexed: 01/11/2023]
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14
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Shi ZH, Li NG, Tang YP, Shi QP, Tang H, Li W, Zhang X, Fu HA, Duan JA. Biological evaluation and SAR analysis of O-methylated analogs of quercetin as inhibitors of cancer cell proliferation. Drug Dev Res 2014; 75:455-62. [PMID: 24976071 DOI: 10.1002/ddr.21181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 05/29/2014] [Indexed: 01/09/2023]
Abstract
Using a high-throughout screening approach, the anticancer activities of 16 O-methylated (OMe) analogs of quercetin were assessed. The structure-activity relationships showed that OMe moieties at the 4' and/or 7 positions were important for maintaining inhibitory activities against the 16 cancer cell lines. Furthermore, when the OH groups at the 3' and 4' positions were both replaced by OMe moieties, anticancer activity was enhanced.
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Affiliation(s)
- Zhi-Hao Shi
- National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China; Department of Organic Chemistry, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China
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Shi ZH, Li NG, Tang YP, Wei-Li, Lian-Yin, Yang JP, Hao-Tang, Duan JA. Metabolism-based synthesis, biologic evaluation and SARs analysis of O-methylated analogs of quercetin as thrombin inhibitors. Eur J Med Chem 2012; 54:210-22. [PMID: 22647223 DOI: 10.1016/j.ejmech.2012.04.044] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Revised: 04/26/2012] [Accepted: 04/30/2012] [Indexed: 11/29/2022]
Abstract
In blood, quercetin is mainly found in metabolized forms. In order to study the activities of these quercetin metabolites in cardiovascular disease, 17 methylquercetin derivatives were synthesized based on metabolism in vivo, their thrombin inhibition activity were evaluated through the analyzation of prothrombin time (PT), activated partial thromboplastin time (APTT), thrombin time (TT) and fibrinogen (FIB). The results showed that 6 methylquercetin derivatives had stronger inhibitory activities than that of quercetin. Preliminary SARs analysis showed that hydroxyl groups at C-3' and C-4' position in the B-ring and hydroxyl group at C-3 position in the C-ring played key roles in the thrombin inhibitory activity. The findings of this study would provide information for the exploitation and utilization of quercetin as thrombin inhibitor for thrombotic disease treatment.
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Affiliation(s)
- Zhi-Hao Shi
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210046, China
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Kajjout M, Rolando C. Regiospecific synthesis of quercetin O-β-d-glucosylated and O-β-d-glucuronidated isomers. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.110] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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