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Montenegro MF, Teruel JA, García-Molina P, Tudela J, Rodríguez-López JN, García-Cánovas F, García-Molina F. Molecular Docking Studies of Ortho-Substituted Phenols to Tyrosinase Helps Discern If a Molecule Can Be an Enzyme Substrate. Int J Mol Sci 2024; 25:6891. [PMID: 39000001 PMCID: PMC11241521 DOI: 10.3390/ijms25136891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
Phenolic compounds with a position ortho to the free phenolic hydroxyl group occupied can be tyrosinase substrates. However, ortho-substituted compounds are usually described as inhibitors. The mechanism of action of tyrosinase on monophenols is complex, and if they are ortho-substituted, it is more complicated. It can be shown that many of these molecules can become substrates of the enzyme in the presence of catalytic o-diphenol, MBTH, or in the presence of hydrogen peroxide. Docking studies can help discern whether a molecule can behave as a substrate or inhibitor of the enzyme. Specifically, phenols such as thymol, carvacrol, guaiacol, eugenol, isoeugenol, and ferulic acid are substrates of tyrosinase, and docking simulations to the active center of the enzyme predict this since the distance of the peroxide oxygen from the oxy-tyrosinase form to the ortho position of the phenolic hydroxyl is adequate for the electrophilic attack reaction that gives rise to hydroxylation occurring.
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Affiliation(s)
- María F. Montenegro
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.F.M.); (P.G.-M.); (J.T.); (J.N.R.-L.)
| | - José A. Teruel
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain;
| | - Pablo García-Molina
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.F.M.); (P.G.-M.); (J.T.); (J.N.R.-L.)
| | - José Tudela
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.F.M.); (P.G.-M.); (J.T.); (J.N.R.-L.)
| | - José Neptuno Rodríguez-López
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.F.M.); (P.G.-M.); (J.T.); (J.N.R.-L.)
| | - Francisco García-Cánovas
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.F.M.); (P.G.-M.); (J.T.); (J.N.R.-L.)
| | - Francisco García-Molina
- Department of Anatomía Patológica, Hospital General Universitario Reina Sofía, Av. Intendente Jorge Palacios, 1, 30003 Murcia, Spain;
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García Molina P, Saura-Sanmartin A, Berna J, Teruel JA, Muñoz Muñoz JL, Rodríguez López JN, García Cánovas F, García Molina F. Considerations about the inhibition of monophenolase and diphenolase activities of tyrosinase. Characterization of the inhibitor concentration which generates 50 % of inhibition, type and inhibition constants. A review. Int J Biol Macromol 2024; 267:131513. [PMID: 38608979 DOI: 10.1016/j.ijbiomac.2024.131513] [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: 12/31/2023] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/14/2024]
Abstract
Tyrosinase is a copper oxidase enzyme which catalyzes the first two steps in the melanogenesis pathway, L-tyrosine to L-dopa conversion and, then, to o-dopaquinone and dopachrome. Hypopigmentation and, above all, hyperpigmentation issues can be originated depending on their activity. This enzyme also promotes the browning of fruits and vegetables. Therefore, control of their activity by regulators is research topic of great relevance. In this work, we consider the use of inhibitors of monophenolase and diphenolase activities of the enzyme in order to accomplish such control. An experimental design and data analysis which allow the accurate calculation of the degree of inhibition of monophenolase activity (iM) and diphenolase activity (iD) are proposed. The IC50 values (amount of inhibitor that causes 50 % inhibition at a fixed substrate concentration) can be calculated for the two activities and from the values of IC50M (monophenolase) and IC50D(diphenolase). Additionally, the strength and type of inhibition can be deduced from these values. The data analysis from these IC50D values allows to obtain the values of [Formula: see text] or [Formula: see text] , or and [Formula: see text] from the values of IC50M. In all cases, the values of the different must satisfy their relationship with IC50M and IC50D.
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Affiliation(s)
- Pablo García Molina
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Adrian Saura-Sanmartin
- Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, E-30100 Espinardo, Murcia, Spain.
| | - Jose Berna
- Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, E-30100 Espinardo, Murcia, Spain
| | - Jose Antonio Teruel
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Jose Luis Muñoz Muñoz
- Microbial Enzymology Lab, Department of Applied Sciences, Ellison Building A, University of Northumbria, Newcastle Upon Tyne, UK
| | - Jose Neptuno Rodríguez López
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Francisco García Cánovas
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Francisco García Molina
- Department of Anatomía Patológica, Hospital General Universitario Reina Sofía, Av. Intendente Jorge Palacios, 1, 30003 Murcia, Spain.
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3
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Szeto C, Lloyd N, Nicolotti L, Herderich MJ, Wilkinson KL. Beyond Volatile Phenols: An Untargeted Metabolomic Approach to Revealing Additional Markers of Smoke Taint in Grapevines ( Vitis vinifera L.) cv. Merlot. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:2018-2033. [PMID: 37159503 DOI: 10.1021/acs.jafc.2c09013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
When bushfires occur near wine regions, vineyards are frequently exposed to environmental smoke, which can negatively affect grapes and wine. For evaluating the severity of smoke exposure, volatile phenols and their glycosides are commonly used as biomarkers of smoke exposure. While critical to refining smoke taint diagnostics, few studies have comprehensively assessed the compositional impact of smoke exposure of grapes. In this study, Merlot grapevines were exposed to smoke post-véraison, with grapes being sampled both pre-smoke exposure and repeatedly post-smoke exposure, for analysis by liquid chromatography-high-resolution mass spectrometry. Volatile phenol glycosides were detected in control and smoke-affected grapes at ≤22 μg/kg and up to 160 μg/kg, respectively. The metabolite profiles of control and smoke-affected grapes were then compared using an untargeted metabolomics approach and compounds differentiating the sample types tentatively identified. The results demonstrate the presence of novel phenolic glycoconjugates as putative metabolites from environmental smoke together with stress-related grapevine metabolites and highlight the need to further characterize the consequences of grapevine smoke exposure with respect to the regulation of abiotic stress and plant defense mechanisms.
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Affiliation(s)
- Colleen Szeto
- Department of Wine Science and Waite Research Institute, The University of Adelaide, Glen Osmond, SA 5064, Australia
- Australian Research Council Training Centre for Innovative Wine Production, Glen Osmond, SA 5064, Australia
| | - Natoiya Lloyd
- The Australian Wine Research Institute (AWRI), Glen Osmond, SA 5064, Australia
- Metabolomics Australia, Glen Osmond, SA 5064, Australia
| | - Luca Nicolotti
- The Australian Wine Research Institute (AWRI), Glen Osmond, SA 5064, Australia
- Metabolomics Australia, Glen Osmond, SA 5064, Australia
| | - Markus J Herderich
- Australian Research Council Training Centre for Innovative Wine Production, Glen Osmond, SA 5064, Australia
- The Australian Wine Research Institute (AWRI), Glen Osmond, SA 5064, Australia
- Metabolomics Australia, Glen Osmond, SA 5064, Australia
| | - Kerry L Wilkinson
- Department of Wine Science and Waite Research Institute, The University of Adelaide, Glen Osmond, SA 5064, Australia
- Australian Research Council Training Centre for Innovative Wine Production, Glen Osmond, SA 5064, Australia
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4
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García Molina P, Antonio Teruel Puche J, Luis Muñoz Muñoz J, Neptuno Rodriguez Lopez J, García Canovas F, García Molina F. Considerations on the action of polyphenoloxidase on 4-hydroxy-cinnamic acid. Molecular docking simulation. Food Chem 2023; 429:136982. [PMID: 37499510 DOI: 10.1016/j.foodchem.2023.136982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/12/2023] [Accepted: 07/21/2023] [Indexed: 07/29/2023]
Affiliation(s)
- Pablo García Molina
- GENZ-Group of Research on Enzymology, Departament of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence, "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Jose Antonio Teruel Puche
- Departament of Biochemestry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Jose Luis Muñoz Muñoz
- Microbial Enzymology Lab, Department of Applied Sciences, Ellison Building, A, University of Northumbria, Newcastle Upon Tyne, UK.
| | - Jose Neptuno Rodriguez Lopez
- Departament of Anatomía Patológica, Hospital General Universitario Reina, Sofía, Av. Intendente Jorge Palacios, 1, 30003 Murcia, Spain
| | - Francisco García Canovas
- GENZ-Group of Research on Enzymology, Departament of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence, "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Francisco García Molina
- Departament of Biochemestry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain.
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5
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Beaumet M, Lazinski LM, Maresca M, Haudecoeur R. Catechol-mimicking transition-state analogues as non-oxidizable inhibitors of tyrosinases. Eur J Med Chem 2023; 259:115672. [PMID: 37487307 DOI: 10.1016/j.ejmech.2023.115672] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/11/2023] [Accepted: 07/19/2023] [Indexed: 07/26/2023]
Abstract
Tyrosinases are copper-containing metalloenzymes involved in several processes in both mammals, insects, bacteria, fungi and plants. Their phenol oxidation properties are especially responsible for human melanogenesis, potentially leading to abnormal pigmentation, and for postharvest vegetable tissue browning. Thus, targeting tyrosinases attracts interest for applications both in dermocosmetic and agrofood fields. However, a large part of the literature about tyrosinase inhibitors is dedicated to the report of copper-interacting phenolic compounds, that are more likely alternative substrates leading to undesirable toxic quinones production. To circumvent this issue, the use of catechol-mimicking copper-chelating groups that are analogues of the tyrosinase oxidation transition state appears as a valuable strategy. Relying on several non-oxidizable pyridinone, pyrone or tropolone moieties, innovative inhibitors were developed, especially within the past decade, and the best reported analogues reached IC50 values in the nanomolar range. Herein, we review the design, the activity against several tyrosinases, and the proposed binding modes of reported catechol-mimicking, non-oxidizable molecules, in light of recent structural data.
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Affiliation(s)
- Morane Beaumet
- Univ. Grenoble Alpes, CNRS 5063, DPM, 38000, Grenoble, France
| | | | - Marc Maresca
- Aix Marseille Univ., CNRS, Centrale Marseille, iSm2, 13013, Marseille, France
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Zolghadri S, Beygi M, Mohammad TF, Alijanianzadeh M, Pillaiyar T, Garcia-Molina P, Garcia-Canovas F, Luis Munoz-Munoz J, Akbar Saboury A. Targeting Tyrosinase in Hyperpigmentation: Current Status, Limitations and Future Promises. Biochem Pharmacol 2023; 212:115574. [PMID: 37127249 DOI: 10.1016/j.bcp.2023.115574] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 05/03/2023]
Abstract
Hyperpigmentation is a common and distressing dermatologic condition. Since tyrosinase (TYR) plays an essential role in melanogenesis, its inhibition is considered a logical approach along with other therapeutic methods to prevent the accumulation of melanin in the skin. Thus, TYR inhibitors are a tempting target as the medicinal and cosmetic active agents of hyperpigmentation disorder. Among TYR inhibitors, hydroquinone is a traditional lightening agent that is commonly used in clinical practice. However, despite good efficacy, prolonged use of hydroquinone is associated with side effects. To overcome these shortcomings, new approaches in targeting TYR and treating hyperpigmentation are desperately requiredessentialneeded. In line with this purpose, several non-hydroquinone lightening agents have been developed and suggested as hydroquinone alternatives. In addition to traditional approaches, nanomedicine and nanotheranostic platforms have been recently proposed in the treatment of hyperpigmentation. In this review, we discuss the available strategies for the management of hyperpigmentation with a focus on TYR inhibition. In addition, alternative treatment options to hydroquinone are discussed. Finally, we present nano-based strategies to improve the therapeutic effect of drugs prescribed to patients with skin disorders.
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Affiliation(s)
- Samaneh Zolghadri
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran.
| | - Mohammad Beygi
- Department of Agricultural Biotechnology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
| | | | - Mahdi Alijanianzadeh
- Department of Cell & Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Thanigaimalai Pillaiyar
- Institute of Pharmacy, Pharmaceutical/Medicinal Chemistry and Tuebingen Center for Academic Drug Discovery, Eberhard Karls University Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Pablo Garcia-Molina
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Francisco Garcia-Canovas
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Jose Luis Munoz-Munoz
- Microbial Enzymology Lab, Department of Applied Sciences, Ellison Building A, University of Northumbria, Newcastle Upon Tyne, UK
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
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7
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Sun Q, Guo Y, Li X, Luo X, Qiu Y, Liu G. A tyrosinase fluorescent probe with large Stokes shift and high fluorescence enhancement for effective identification of liver cancer cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121831. [PMID: 36150261 DOI: 10.1016/j.saa.2022.121831] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/24/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
Tyrosinase is widely regarded as an important biomarker for melanocytic and liver cancer. However, most currently reported tyrosinase probes have been focused on malignant melanoma study, and few tyrosinase probe have been applied for liver cancer investigation. Herein, we developed a novel probe HFC-TYR for sensitive and selective tracking of tyrosinase activity at enzyme and cellular level, and investigated its application for liver cancer diagnosis. As expected, HFC-TYR has excellent response ability for tyrosinase sensing at enzyme level, such as large Stokes shift (170 nm), high fluorescence enhancement (178-fold), low detection limit (0.12 U/mL), which indicates its potential for efficient identification of endogenous tyrosinase activity at cellular levels. Unsurprisingly, HFC-TYR is proved to be able detect endogenous tyrosinase levels in various living cells. More importantly, HFC-TYR is successfully used to distinguish HepG2 cells from other cells (SKOV3, HeLa and 293T), indicating that tyrosinase is overexpressed in HepG2 cells and HFC-TYR can specifically identify HepG2 cells at cellular level. Meanwhile, HFC-TYR is able to further monitor the endogenous tyrosinase activity in zebrafish models. Therefore, all the findings confirm that HFC-TYR has the application potential of liver cancer diagnosis.
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Affiliation(s)
- Qi Sun
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Key Laboratory of Novel biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Yun Guo
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Key Laboratory of Novel biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Xiang Li
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Key Laboratory of Novel biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Xiaogang Luo
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Key Laboratory of Novel biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China; School of Materials Science and Engineering, Zhengzhou University, No.100 Science Avenue, Zhengzhou City 450001, Henan Province, China
| | - Yuan Qiu
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Key Laboratory of Novel biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
| | - Genyan Liu
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Key Laboratory of Novel biomass-based Environmental and Energy Materials in Petroleum and Chemical Industry and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
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8
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Xu H, Li X, Mo L, Zou Y, Zhao G. Tyrosinase inhibitory mechanism and the anti-browning properties of piceid and its ester. Food Chem 2022; 390:133207. [PMID: 35594768 DOI: 10.1016/j.foodchem.2022.133207] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 01/12/2023]
Abstract
Different mechanisms for inhibiting tyrosinase can be exploited to avoid quality losses caused by the enzymatic browning of fruits and vegetables. Piceid (PI) and piceid 6″-O- azelaic acid ester (PIA) are oxidized by tyrosinase; however, their oxidation products may have inhibitory effects on tyrosinase. This notion is because l-DOPA oxidation was inhibited after the pre-incubation of PI/PIA with tyrosinase, however, l-DOPA oxidation was not affected if this pre-incubation was not performed. Circular dichroism analysis indicated a conformational change in the secondary structure of tyrosinase after pre-incubation. Further, molecular docking and enzyme reaction kinetics assays were employed to reveal the mechanism underlying the effects of PI/PIA on tyrosinase in the absence of pre-incubation with tyrosinase. PI/PIA had anti-browning effects in the potato models. The increased rate of A420 in PI/PIA groups at 24 h were 281% and 279%, which were approximately 2.4- and 2.5-fold lower than that of control (668%).
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Affiliation(s)
- Haixia Xu
- College of Food Science and Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Xiaofeng Li
- College of Food Science and Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China.
| | - Lan Mo
- College of Food Science and Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Yucong Zou
- College of Food Science and Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Guanglei Zhao
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China.
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9
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Wu P, Qiao L, Yu H, Ming H, Liu C, Wu W, Li B. Arbutin Alleviates the Liver Injury of α-Naphthylisothiocyanate-induced Cholestasis Through Farnesoid X Receptor Activation. Front Cell Dev Biol 2021; 9:758632. [PMID: 34926449 PMCID: PMC8675020 DOI: 10.3389/fcell.2021.758632] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 11/10/2021] [Indexed: 11/13/2022] Open
Abstract
Cholestasis is a kind of stressful syndrome along with liver toxicity, which has been demonstrated to be related to fibrosis, cirrhosis, even cholangiocellular or hepatocellular carcinomas. Cholestasis usually caused by the dysregulated metabolism of bile acids that possess high cellular toxicity and synthesized by cholesterol in the liver to undergo enterohepatic circulation. In cholestasis, the accumulation of bile acids in the liver causes biliary and hepatocyte injury, oxidative stress, and inflammation. The farnesoid X receptor (FXR) is regarded as a bile acid–activated receptor that regulates a network of genes involved in bile acid metabolism, providing a new therapeutic target to treat cholestatic diseases. Arbutin is a glycosylated hydroquinone isolated from medicinal plants in the genus Arctostaphylos, which has a variety of potentially pharmacological properties, such as anti-inflammatory, antihyperlipidemic, antiviral, antihyperglycemic, and antioxidant activity. However, the mechanistic contributions of arbutin to alleviate liver injury of cholestasis, especially its role on bile acid homeostasis via nuclear receptors, have not been fully elucidated. In this study, we demonstrate that arbutin has a protective effect on α-naphthylisothiocyanate–induced cholestasis via upregulation of the levels of FXR and downstream enzymes associated with bile acid homeostasis such as Bsep, Ntcp, and Sult2a1, as well as Ugt1a1. Furthermore, the regulation of these functional proteins related to bile acid homeostasis by arbutin could be alleviated by FXR silencing in L-02 cells. In conclusion, a protective effect could be supported by arbutin to alleviate ANIT-induced cholestatic liver toxicity, which was partly through the FXR pathway, suggesting arbutin may be a potential chemical molecule for the cholestatic disease.
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Affiliation(s)
- Peijie Wu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ling Qiao
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Han Yu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hui Ming
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chao Liu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Wenjun Wu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Baixue Li
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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10
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Considerations about the Continuous Assay Methods, Spectrophotometric and Spectrofluorometric, of the Monophenolase Activity of Tyrosinase. Biomolecules 2021; 11:biom11091269. [PMID: 34572482 PMCID: PMC8465126 DOI: 10.3390/biom11091269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 08/21/2021] [Accepted: 08/22/2021] [Indexed: 12/03/2022] Open
Abstract
With the purpose to obtain the more useful tyrosinase assay for the monophenolase activity of tyrosinase between the spectrofluorometric and spectrophotometric continuous assays, simulated assays were made by means of numerical integration of the equations that characterize the mechanism of monophenolase activity. These assays showed that the rate of disappearance of monophenol (VssM,M) is equal to the rate of accumulation of dopachrome (VssM,DC) or to the rate of accumulation of its oxidized adduct, originated by the nucleophilic attack on o-quinone by a nucleophile such as 3-methyl-2-benzothiazolinone (MBTH), (VssM, A−ox), despite the existence of coupled reactions. It is shown that the spectrophotometric methods that use MBTH are more useful, as they do not have the restrictions of the L-tyrosine disappearance measurement method, of working at pH = 8 and not having a linear response from 100 μM of L-tyrosine. It is possible to obtain low LODM (limit of detection of the monophenolase activity) values with spectrophotometric methods. The spectrofluorimetric methods had a lower LODM than spectrophotometric methods. In the case of 4-hydroxyphenil-propionic acid, the LODM obtained by us was 0.25 U/mL. Considering the relative sensitivities of 4-hydroxyanisole, compared with 4-hydroxyphenil-propionic acid, LODM values like those obtained by fluorescent methods would be expected.
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11
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Wang M, Xie JL, Li J, Fan YY, Deng X, Duan HL, Zhang ZQ. 3-Aminophenyl Boronic Acid Functionalized Quantum-Dot-Based Ratiometric Fluorescence Sensor for the Highly Sensitive Detection of Tyrosinase Activity. ACS Sens 2020; 5:1634-1640. [PMID: 32486639 DOI: 10.1021/acssensors.0c00122] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Using the commercially available and economical 6-hydroxycoumarin (6-HC) as the substrate, a dual-emission ratiometric fluorescence sensor was developed to detect tyrosinase (TYR) activity based on 3-aminophenyl boronic acid functionalized quantum dots (APBA-QDs). TYR can catalyze 6-HC, a monohydroxy compound, to form a fluorescence-enhancing o-hydroxy compound, 6,7-dihydroxycoumarin. Owing to the special covalent binding between the o-hydroxyl and boric acid groups, APBA-QDs react with 6,7-dihydroxycoumarin to form a five-membered ring ester dual-emission fluorescence probe for TYR. With an increase in TYR activity, the fluorescence at 675 nm originating from the QDs is gradually quenched, whereas that at 465 nm owing to 6,7-dihydroxycoumarin increases. Referencing the decreasing signal of the dual-emission probe at 675 nm to measure the increasing signal at 465 nm, a ratiometric fluorescence method was established to detect the TYR activity with high sensitivity and selectivity. Under the conditions optimized via response surface methodology, a linear range of 0-0.05 U/mL was obtained for the TYR activity. The detection limit was as low as 0.003 U/mL. This sensing strategy can also be adopted for the rapid screening of the TYR inhibitors.
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Affiliation(s)
- Man Wang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Jia-Ling Xie
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), Ministry of Education, Xi’an 710062, China
| | - Jun Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Yao-Yao Fan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Xu Deng
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Hui-Ling Duan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Zhi-Qi Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry (Shaanxi Normal University), Ministry of Education, Xi’an 710062, China
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12
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Casanova A, Cuartero M, Alacid Y, Almagro CM, García-Cánovas F, García MS, Ortuño JA. A sustainable amperometric biosensor for the analysis of ascorbic, benzoic, gallic and kojic acids through catechol detection. Innovation and signal processing. Analyst 2020; 145:3645-3655. [DOI: 10.1039/c9an02523e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sustainable catechol biosensor for the analysis of beverages and cosmetics.
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Affiliation(s)
- Ana Casanova
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Murcia
- Murcia E-30100
- Spain
| | - María Cuartero
- Department of Chemistry
- School of Engineering Science in Chemistry
- Biotechnology and Healthcare
- KTH Royal Institute of Technology
- Stockholm
| | - Yolanda Alacid
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Murcia
- Murcia E-30100
- Spain
| | - Carmen M. Almagro
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Murcia
- Murcia E-30100
- Spain
| | - Francisco García-Cánovas
- Department of Biochemistry and Molecular Biology-A
- Faculty of Biology
- University of Murcia
- Murcia E-30100
- Spain
| | - María S. García
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Murcia
- Murcia E-30100
- Spain
| | - Joaquín A. Ortuño
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Murcia
- Murcia E-30100
- Spain
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13
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Zolghadri S, Bahrami A, Hassan Khan MT, Munoz-Munoz J, Garcia-Molina F, Garcia-Canovas F, Saboury AA. A comprehensive review on tyrosinase inhibitors. J Enzyme Inhib Med Chem 2019; 34:279-309. [PMID: 30734608 PMCID: PMC6327992 DOI: 10.1080/14756366.2018.1545767] [Citation(s) in RCA: 486] [Impact Index Per Article: 97.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/04/2018] [Accepted: 11/05/2018] [Indexed: 12/17/2022] Open
Abstract
Tyrosinase is a multi-copper enzyme which is widely distributed in different organisms and plays an important role in the melanogenesis and enzymatic browning. Therefore, its inhibitors can be attractive in cosmetics and medicinal industries as depigmentation agents and also in food and agriculture industries as antibrowning compounds. For this purpose, many natural, semi-synthetic and synthetic inhibitors have been developed by different screening methods to date. This review has focused on the tyrosinase inhibitors discovered from all sources and biochemically characterised in the last four decades.
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Affiliation(s)
- Samaneh Zolghadri
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | - Asieh Bahrami
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | | | - J. Munoz-Munoz
- Group of Microbiology, Department of Applied Sciences, Northumbria University at Newcastle, Newcastle Upon Tyne, UK
| | - F. Garcia-Molina
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - F. Garcia-Canovas
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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14
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Natural and Bioinspired Phenolic Compounds as Tyrosinase Inhibitors for the Treatment of Skin Hyperpigmentation: Recent Advances. COSMETICS 2019. [DOI: 10.3390/cosmetics6040057] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
One of the most common approaches for control of skin pigmentation involves the inhibition of tyrosinase, a copper-containing enzyme which catalyzes the key steps of melanogenesis. This review focuses on the tyrosinase inhibition properties of a series of natural and synthetic, bioinspired phenolic compounds that have appeared in the literature in the last five years. Both mushroom and human tyrosinase inhibitors have been considered. Among the first class, flavonoids, in particular chalcones, occupy a prominent role as natural inhibitors, followed by hydroxystilbenes (mainly resveratrol derivatives). A series of more complex phenolic compounds from a variety of sources, first of all belonging to the Moraceae family, have also been described as potent tyrosinase inhibitors. As to the synthetic compounds, hydroxycinnamic acids and chalcones again appear as the most exploited scaffolds. Several inhibition mechanisms have been reported for the described inhibitors, pointing to copper chelating and/or hydrophobic moieties as key structural requirements to achieve good inhibition properties. Emerging trends in the search for novel skin depigmenting agents, including the development of assays that could distinguish between inhibitors and potentially toxic substrates of the enzyme as well as of formulations aimed at improving the bioavailability and hence the effectiveness of well-known inhibitors, have also been addressed.
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15
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Chemical and Biocatalytic Routes to Arbutin †. Molecules 2019; 24:molecules24183303. [PMID: 31514332 PMCID: PMC6766929 DOI: 10.3390/molecules24183303] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 09/04/2019] [Accepted: 09/09/2019] [Indexed: 02/06/2023] Open
Abstract
Arbutin (also called β-arbutin) is a natural product occurring in the leaves of a variety of different plants, the bearberries of the Ericaceae and Saxifragaceae families being prominent examples. It is a β-glucoside derived from hydroquinone (HQ; 1,4-dihydroxybenzene). Arbutin has been identified in traditional Chinese folk medicines as having, inter alia, anti-microbial, anti-oxidant, and anti-inflammatory properties that useful in the treatment of different ailments including urinary diseases. Today, it is also used worldwide for the treatment of skin ailments by way of depigmenting, which means that arbutin is a component of many products in the cosmetics and healthcare industries. It is also relevant in the food industry. Hundreds of publications have appeared describing the isolation, structure determination, toxicology, synthesis, and biological properties of arbutin as well as the molecular mechanism of melanogenesis (tyrosinase inhibition). This review covers the most important aspects with special emphasis on the chemical and biocatalytic methods for the production of arbutin.
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16
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Lin X, Sun DW. Research advances in browning of button mushroom (Agaricus bisporus): Affecting factors and controlling methods. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.05.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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17
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Sidhu JS, Singh N. FRET and PET paired dual mechanistic carbon dots approach for tyrosinase sensing. J Mater Chem B 2018; 6:4139-4145. [DOI: 10.1039/c8tb00512e] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In the presence of tyrosinase, the probe shows a ratiometric fluorescence response owing to a dual mechanistic FRET and PET approach.
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Affiliation(s)
| | - Narinder Singh
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar
- India
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18
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Garcia-Jimenez A, Teruel-Puche JA, Berna J, Rodriguez-Lopez JN, Tudela J, Garcia-Canovas F. Action of tyrosinase on alpha and beta-arbutin: A kinetic study. PLoS One 2017; 12:e0177330. [PMID: 28493937 PMCID: PMC5426667 DOI: 10.1371/journal.pone.0177330] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 04/17/2017] [Indexed: 11/18/2022] Open
Abstract
The known derivatives from hydroquinone, α and β-arbutin, are used as depigmenting agents. In this work, we demonstrate that the oxy form of tyrosinase (oxytyrosinase) hydroxylates α and β-arbutin in ortho position of the phenolic hydroxyl group, giving rise to a complex formed by met-tyrosinase with the hydroxylated α or β-arbutin. This complex could evolve in two ways: by oxidizing the originated o-diphenol to o-quinone and deoxy-tyrosinase, or by delivering the o-diphenol and met-tyrosinase to the medium, which would produce the self-activation of the system. Note that the quinones generated in both cases are unstable, so the catalysis cannot be studied quantitatively. However, if 3-methyl-2-benzothiazolinone hydrazone hydrochloride hydrate is used, the o-quinone is attacked, so that it becomes an adduct, which can be oxidized by another molecule of o-quinone, generating o-diphenol in the medium. In this way, the system reaches the steady state and originates a chromophore, which, in turn, has a high absorptivity in the visible spectrum. This reaction allowed us to characterize α and β-arbutin kinetically as substrates of tyrosinase for the first time, obtaining a Michaelis constant values of 6.5 ± 0.58 mM and 3 ± 0.19 mM, respectively. The data agree with those from docking studies that showed that the enzyme has a higher affinity for β-arbutin. Moreover, the catalytic constants obtained by the kinetic studies (catalytic constant = 4.43 ± 0.33 s-1 and 3.7 ± 0.29 s-1 for α and β-arbutin respectively) agree with our forecast based on 13 C NMR considerations. This kinetic characterization of α and β-arbutin as substrates of tyrosinase should be taken into account to explain possible adverse effects of these compounds.
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Affiliation(s)
- Antonio Garcia-Jimenez
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Jose Antonio Teruel-Puche
- Group of Molecular Interactions in Membranes, Department of Biochemistry and Molecular Biology-A, University of Murcia, Espinardo, Murcia, Spain
| | - Jose Berna
- Group of Synthetic Organic Chemistry, Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, Espinardo, Murcia, Spain
| | - José Neptuno Rodriguez-Lopez
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Jose Tudela
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Francisco Garcia-Canovas
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
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19
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Skin Whitening Cosmetics: Feedback and Challenges in the Development of Natural Skin Lighteners. COSMETICS 2016. [DOI: 10.3390/cosmetics3040036] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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20
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Characterization of the action of tyrosinase on resorcinols. Bioorg Med Chem 2016; 24:4434-4443. [PMID: 27480027 DOI: 10.1016/j.bmc.2016.07.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/18/2016] [Accepted: 07/20/2016] [Indexed: 11/22/2022]
Abstract
The action of tyrosinase on resorcinol and some derivatives (4-ethylresorcinol, 2-methylresorcinol and 4-methylresorcinol) was investigated. If the catalytic cycle is completed with a reductant such as ascorbic acid or an o-diphenol such as 4-tert-butylcatechol, these compounds act as substrates of tyrosinase in all cases. The reaction can also be carried out, adding hydrogen peroxide to the medium. All the above compounds were characterized as substrates of the enzyme and their kinetic constants, KM (Michaelis constant) and kcat (catalytic constant) were determined. Measurement of the activity of the enzyme after pre-incubation with resorcinol, 4-ethylresorcinol or 4-methylresorcinol points to an apparent loss of activity at short times, which could correspond to an enzymatic inactivation process. However, if the measurements are extended over longer times, a burst is observed and the enzymatic activity is recovered, demonstrating that these compounds are not suicide substrates of the enzyme. These effects are not observed with 2-methylresorcinol. The docking results indicate that the binding of met-tyrosinase with these resorcinols occurs in the same way, but not with 2-methylresorcinol, due to steric hindrance.
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21
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Garcia-Jimenez A, Teruel-Puche JA, Ortiz-Ruiz CV, Berna J, Tudela J, Garcia-Canovas F. 4-n-butylresorcinol, a depigmenting agent used in cosmetics, reacts with tyrosinase. IUBMB Life 2016; 68:663-72. [DOI: 10.1002/iub.1528] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/06/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Antonio Garcia-Jimenez
- Department of Biochemistry and Molecular Biology-A, GENZ-Group of Research on Enzymology (www.um.es/genz), Regional Campus of International Excellence “Campus Mare Nostrum,”; University of Murcia; Espinardo, Murcia Spain
| | - Jose Antonio Teruel-Puche
- Department of Biochemistry and Molecular Biology-A, Group of Molecular Interactions in Membranes; University of Murcia; Espinardo, Murcia Spain
| | - Carmen Vanessa Ortiz-Ruiz
- Department of Biochemistry and Molecular Biology-A, GENZ-Group of Research on Enzymology (www.um.es/genz), Regional Campus of International Excellence “Campus Mare Nostrum,”; University of Murcia; Espinardo, Murcia Spain
| | - Jose Berna
- Department of Organic Chemistry, Faculty of Chemistry, Group of Synthetic Organic Chemistry; University of Murcia; Espinardo, Murcia Spain
| | - Jose Tudela
- Department of Biochemistry and Molecular Biology-A, GENZ-Group of Research on Enzymology (www.um.es/genz), Regional Campus of International Excellence “Campus Mare Nostrum,”; University of Murcia; Espinardo, Murcia Spain
| | - Francisco Garcia-Canovas
- Department of Biochemistry and Molecular Biology-A, GENZ-Group of Research on Enzymology (www.um.es/genz), Regional Campus of International Excellence “Campus Mare Nostrum,”; University of Murcia; Espinardo, Murcia Spain
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22
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Aurone synthase is a catechol oxidase with hydroxylase activity and provides insights into the mechanism of plant polyphenol oxidases. Proc Natl Acad Sci U S A 2016; 113:E1806-15. [PMID: 26976571 DOI: 10.1073/pnas.1523575113] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Tyrosinases and catechol oxidases belong to the family of polyphenol oxidases (PPOs). Tyrosinases catalyze theo-hydroxylation and oxidation of phenolic compounds, whereas catechol oxidases were so far defined to lack the hydroxylation activity and catalyze solely the oxidation of o-diphenolic compounds. Aurone synthase from Coreopsis grandiflora (AUS1) is a specialized plant PPO involved in the anabolic pathway of aurones. We present, to our knowledge, the first crystal structures of a latent plant PPO, its mature active and inactive form, caused by a sulfation of a copper binding histidine. Analysis of the latent proenzyme's interface between the shielding C-terminal domain and the main core provides insights into its activation mechanisms. As AUS1 did not accept common tyrosinase substrates (tyrosine and tyramine), the enzyme is classified as a catechol oxidase. However, AUS1 showed hydroxylase activity toward its natural substrate (isoliquiritigenin), revealing that the hydroxylase activity is not correlated with the acceptance of common tyrosinase substrates. Therefore, we propose that the hydroxylase reaction is a general functionality of PPOs. Molecular dynamics simulations of docked substrate-enzyme complexes were performed, and a key residue was identified that influences the plant PPO's acceptance or rejection of tyramine. Based on the evidenced hydroxylase activity and the interactions of specific residues with the substrates during the molecular dynamics simulations, a novel catalytic reaction mechanism for plant PPOs is proposed. The presented results strongly suggest that the physiological role of plant catechol oxidases were previously underestimated, as they might hydroxylate their--so far unknown--natural substrates in vivo.
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23
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Fiocco D, Arciuli M, Arena MP, Benvenuti S, Gallone A. Chemical composition and the anti-melanogenic potential of different essential oils. FLAVOUR FRAG J 2016. [DOI: 10.1002/ffj.3315] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniela Fiocco
- Department of Clinical and Experimental Medicine; University of Foggia; Foggia Italy
| | - Marcella Arciuli
- Department of Basic Medical Sciences, Neuroscience and Sense Organs; University of Bari; Bari Italy
| | - Mattia Pia Arena
- Department of Clinical and Experimental Medicine; University of Foggia; Foggia Italy
- Department of Agriculture, Food and Environmental Science; University of Foggia; Foggia Italy
| | - Stefania Benvenuti
- Department of Life Sciences; University of Modena and Reggio Emilia; Modena Italy
| | - Anna Gallone
- Department of Basic Medical Sciences, Neuroscience and Sense Organs; University of Bari; Bari Italy
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24
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Ortiz-Ruiz CV, Ballesta de Los Santos M, Berna J, Fenoll J, Garcia-Ruiz PA, Tudela J, Garcia-Canovas F. Kinetic characterization of oxyresveratrol as a tyrosinase substrate. IUBMB Life 2015; 67:828-36. [PMID: 26450473 DOI: 10.1002/iub.1439] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 09/18/2015] [Indexed: 12/28/2022]
Abstract
Oxyresveratrol is a stilbenoid described as a powerful inhibitor of tyrosinase and proposed as skin-whitening and anti-browning agent. However, the enzyme is capable of acting on it, considering it as a substrate, as it has been proved in the case of its analogous resveratrol. Tyrosinase hydroxylates the oxyresveratrol to an o-diphenol and oxidizes the latter to an o-quinone, which finally isomerizes to p-quinone. For these reactions to take place the presence of the Eox (oxy-tyrosinase) form is necessary. The kinetic analysis of the proposed mechanism has allowed the kinetic characterization of this molecule as a substrate of tyrosinase, affording a catalytic constant of 5.39 ± 0.21 sec(-1) and a Michaelis constant of 8.65 ± 0.73 µM.
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Affiliation(s)
- Carmen Vanessa Ortiz-Ruiz
- GENZ: Grupo De Investigación Enzimología, Departamento De Bioquímica Y Biología Molecular-A, Facultad De Biología, Campus De Excelencia Internacional "Mare Nostrum", Universidad De Murcia, Murcia, Spain
| | - Manuel Ballesta de Los Santos
- GENZ: Grupo De Investigación Enzimología, Departamento De Bioquímica Y Biología Molecular-A, Facultad De Biología, Campus De Excelencia Internacional "Mare Nostrum", Universidad De Murcia, Murcia, Spain
| | - Jose Berna
- Grupo De Química Orgánica Sintética. Departamento De Química Orgánica. Facultad De Química, Campus De Excelencia Internacional "Mare Nostrum", Universidad De Murcia, Murcia, Spain
| | - Jose Fenoll
- IMIDA: Instituto Murciano De Investigación Y Desarrollo Agrario Y Alimentario, Murcia, Spain
| | - Pedro Antonio Garcia-Ruiz
- QCPAI: Grupo De Química De Carbohidratos, Polímeros Y Aditivos Industriales, Departamento De Química Orgánica. Facultad De Química, Campus De Excelencia Internacional "Mare Nostrum", Universidad De Murcia, Murcia, Spain
| | - Jose Tudela
- GENZ: Grupo De Investigación Enzimología, Departamento De Bioquímica Y Biología Molecular-A, Facultad De Biología, Campus De Excelencia Internacional "Mare Nostrum", Universidad De Murcia, Murcia, Spain
| | - Francisco Garcia-Canovas
- GENZ: Grupo De Investigación Enzimología, Departamento De Bioquímica Y Biología Molecular-A, Facultad De Biología, Campus De Excelencia Internacional "Mare Nostrum", Universidad De Murcia, Murcia, Spain
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25
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Ortiz-Ruiz CV, Maria-Solano MA, Garcia-Molina MDM, Varon R, Tudela J, Tomas V, Garcia-Canovas F. Kinetic characterization of substrate-analogous inhibitors of tyrosinase. IUBMB Life 2015; 67:757-67. [PMID: 26399372 DOI: 10.1002/iub.1432] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 08/31/2015] [Indexed: 11/10/2022]
Abstract
The development of effective tyrosinase inhibitors has become increasingly important in the cosmetic, medicinal, and agricultural industries for application as antibrowning and depigmenting agents. The kinetic mechanisms of action of tyrosinase on monophenols and o-diphenols are complex, particularly in the case of monophenols because of the lag period that occurs at the beginning of the reaction. When enzyme inhibitors are studied, the problem becomes more complicated because the lag period increases, which has led to erroneous identification of the type of inhibition that many compounds exert on the monophenolase activity and the inaccurate determination of their inhibition constants. When the degrees of inhibition of an inhibitor which is analogous to tyrosinase substrates are the same for both monophenolase and diphenolase activities, this means that the inhibitor binds to the same enzymatic species and so the inhibition constants should be similar for both activities. In this study, we demonstrate this typical behavior of substrate-analogous inhibitors and propose a methodology for determining the type of inhibition and the inhibition constants for the monophenolase and diphenolase activities of the enzyme. Benzoic acid and cinnamic acid were used as inhibitors and the monophenol/o-diphenol pairs l-tyrosine/l-dopa and α-methyl-L-tyrosine/α-methyl-L-dopa as substrates.
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Affiliation(s)
- Carmen Vanessa Ortiz-Ruiz
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Espinardo, Murcia, Spain
| | - Miguel Angel Maria-Solano
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Espinardo, Murcia, Spain
| | - Maria Del Mar Garcia-Molina
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Espinardo, Murcia, Spain
| | - Ramon Varon
- Department of Physical Chemistry, Technical School of Industrial Engineering, University of Castilla La Mancha, Avda. España s/n. Campus Universitario, Albacete, Spain
| | - Jose Tudela
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Espinardo, Murcia, Spain
| | - Virginia Tomas
- Department of Analytical Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Espinardo, Murcia, Spain
| | - Francisco Garcia-Canovas
- Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum," University of Murcia, Espinardo, Murcia, Spain
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26
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Asthana S, Zucca P, Vargiu AV, Sanjust E, Ruggerone P, Rescigno A. Structure-Activity Relationship Study of Hydroxycoumarins and Mushroom Tyrosinase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:7236-7244. [PMID: 26263396 DOI: 10.1021/acs.jafc.5b02636] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The structure-activity relationships of four hydroxycoumarins, two with the hydroxyl group on the aromatic ring of the molecule and two with the hydroxyl group replacing hydrogen of the pyrone ring, and their interactions with mushroom tyrosinase were studied. These compounds displayed different behaviors upon action of the enzyme. The two compounds, ar-hydroxylated 6-hydroxycoumarin and 7-hydroxycoumarin, were both weak substrates of the enzyme. Interestingly, in both cases, the product of the catalysis was the 6,7-hydroxycoumarin, although 5,6- and 7,8-isomers could also theoretically be formed. Additionally, both were able to reduce the formation of dopachrome when tyrosinase acted on its typical substrate, L-tyrosine. Although none of the compounds that contained a hydroxyl group on the pyrone ring were substrates of tyrosinase, the 3-hydroxycoumarin was a potent inhibitor of the enzyme, and the 4-hydroxycoumarin was not an inhibitor. These results were compared with those obtained by in silico molecular docking predictions to obtain potentially useful information for the synthesis of new coumarin-based inhibitors that resemble the structure of the 3-hydroxycoumarin.
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Affiliation(s)
- Shailendra Asthana
- †Drug Discovery Research Center (DDRC), Translational Health Science and Technology Institute (THSTI), NCR Biotech Science Cluster, Third Milestone, Faridabad-Gurgaon Expressway, Haryana 121001, India
| | - Paolo Zucca
- §Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato, Cagliari, Italy
- #Consorzio UNO Università Oristano, 09170 Oristano, Italy
| | - Attilio V Vargiu
- ⊥Dipartimento di Fisica, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato, Cagliari, Italy
| | - Enrico Sanjust
- §Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato, Cagliari, Italy
| | - Paolo Ruggerone
- ⊥Dipartimento di Fisica, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato, Cagliari, Italy
| | - Antonio Rescigno
- §Dipartimento di Scienze Biomediche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato, Cagliari, Italy
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Ortiz-Ruiz CV, Berna J, Rodriguez-Lopez JN, Tomas V, Garcia-Canovas F. Tyrosinase-Catalyzed Hydroxylation of 4-Hexylresorcinol, an Antibrowning and Depigmenting Agent: A Kinetic Study. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:7032-7040. [PMID: 26176355 DOI: 10.1021/acs.jafc.5b02523] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
4-Hexylresorcinol (HR) is a compound used in the food and cosmetic industries as an antibrowning and lightening agent. Its use is mainly attributed to its inhibitory effect on the enzyme tyrosinase. However, the enzyme hydroxylates HR to an o-diphenol, which it then oxidizes to an o-quinone, which rapidly isomerizes to p-quinone. For tyrosinase to act in this way, the Eox form (oxy-tyrosinase) must be present in the reaction medium, which can be brought about by (a) hydrogen peroxide, (b) ascorbic acid, or (c) catalytic concentrations of o-diphenol and a reductant (NADH) to maintain it constant. This work demonstrates that HR is a substrate of tyrosinase and proposes a mechanism for its action. Its kinetic characterization provides a catalytic constant of 0.85 ± 0.04 s(-1) and a Michaelis constant of 60.31 ± 6.73 μM.
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Affiliation(s)
- Carmen Vanessa Ortiz-Ruiz
- †GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, ‡Group of Synthetic Organic Chemistry, Department of Organic Chemistry, and #Department of Analytical Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30071 Murcia, Spain
| | - Jose Berna
- †GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, ‡Group of Synthetic Organic Chemistry, Department of Organic Chemistry, and #Department of Analytical Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30071 Murcia, Spain
| | - Jose Neptuno Rodriguez-Lopez
- †GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, ‡Group of Synthetic Organic Chemistry, Department of Organic Chemistry, and #Department of Analytical Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30071 Murcia, Spain
| | - Virginia Tomas
- †GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, ‡Group of Synthetic Organic Chemistry, Department of Organic Chemistry, and #Department of Analytical Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30071 Murcia, Spain
| | - Francisco Garcia-Canovas
- †GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, ‡Group of Synthetic Organic Chemistry, Department of Organic Chemistry, and #Department of Analytical Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30071 Murcia, Spain
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