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Manh Khoa N, Viet Phong N, Yang SY, Min BS, Kim JA. Spectroscopic analysis, kinetic mechanism, computational docking, and molecular dynamics of active metabolites from the aerial parts of Astragalus membranaceusBunge as tyrosinase inhibitors. Bioorg Chem 2023; 134:106464. [PMID: 36921361 DOI: 10.1016/j.bioorg.2023.106464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/13/2023]
Abstract
A new isoflavane derivative (2), a new natural isoflavane (6), four new oleanane-type triterpenoid saponins (23, 25, 28, and 29), and twenty three known secondary metabolites (1, 3-5, 7-22, 24, 26, and 27) were isolated from the aerial parts of Astragalus membranaceus Bunge. The chemical structures of these compounds were elucidated through spectroscopic analysis and compared with those identified in previous studies. Tyrosinase inhibition ability of isolated compounds (1-29) was evaluated. Of these, compounds 3, 4, 6, and 14 exhibited inhibitory effects, with IC50 values ranging from 24.6 to 59.2 μM. According to kinetic analysis, compounds 3 and 4 were non-competitive inhibitors of tyrosinase, whereas compounds 6 and 14 inhibited tyrosinase in uncompetitive and competitive modes, respectively. Molecular docking analysis identified that compounds 3, 4, and 6 could bind to allosteric sites and compound 14 could bind to the catalytic site of tyrosinase, which is consistent with the results of kinetic studies. Molecular dynamics behaviors of the active compounds in complex with tyrosinase were investigated via 60 ns simulation which demonstrated their high stability. These findings indicate that the aerial parts of A. membranaceus are a potential source of natural tyrosinase inhibitors.
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Affiliation(s)
- Nguyen Manh Khoa
- Vessel-Organ Interaction Research Center, VOICE (MRC), College of Pharmacy, Kyungpook National University, Daegu 41566, Republic of Korea; BK21 FOUR Community-Based Intelligent Novel Drug Discovery Education Unit, College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Nguyen Viet Phong
- Vessel-Organ Interaction Research Center, VOICE (MRC), College of Pharmacy, Kyungpook National University, Daegu 41566, Republic of Korea; BK21 FOUR Community-Based Intelligent Novel Drug Discovery Education Unit, College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Seo Young Yang
- Department of Pharmaceutical Engineering, Sangji University, Wonju 26339, Republic of Korea
| | - Byung Sun Min
- College of Pharmacy, Drug Research and Development Center, Daegu Catholic University, Gyeongbuk 38430, Republic of Korea.
| | - Jeong Ah Kim
- Vessel-Organ Interaction Research Center, VOICE (MRC), College of Pharmacy, Kyungpook National University, Daegu 41566, Republic of Korea; BK21 FOUR Community-Based Intelligent Novel Drug Discovery Education Unit, College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.
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Protective Effects of Salicornia europaea on UVB-Induced Misoriented Cell Divisions in Skin Epithelium. COSMETICS 2020. [DOI: 10.3390/cosmetics7020044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Correct orientation of cell division is extremely important in the maintenance, regeneration, and repair of continuously proliferating tissues, such as the epidermis. Regulation of the axis of division of epidermal cells prevents the apoptosis-induced compensatory proliferation, and eventually the cancer. Thus, the orientation of cell division is critical for maintaining the tissue architecture. In this study, we investigated the effects of S. europaea extract on the texture of human skin and the behavior of these cells during skin morphogenesis. In sun-exposed skin, S. europaea improved the texture. A multilayered, highly differentiated in vitro skin model indicated that, S. europaea extract suppressed the UVB-induced changes in the morphology of basal keratinocytes. Orientation of cell division was determined by measuring the axis of mitosis in the vertical sections of our experimental model. Analyses of the digital images revealed that S. europaea preserved the axis of division of basal keratinocytes from UVB-induced perturbations. Our findings uncover a new mechanism by which S. europaea responds to the spindle misorientation induced by UVB.
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Bonesi M, Xiao J, Tundis R, Aiello F, Sicari V, Loizzo MR. Advances in the Tyrosinase Inhibitors from Plant Source. Curr Med Chem 2019; 26:3279-3299. [PMID: 29788869 DOI: 10.2174/0929867325666180522091311] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 04/04/2017] [Accepted: 04/10/2017] [Indexed: 02/08/2023]
Abstract
Tyrosinase is a multifunctional copper-containing oxidase which catalyses the oxidation of tyrosine to produce melanin. The alteration in melanin biosynthesis occurs in many diseases. The pigment has a protecting role against skin photo-carcinogenesis, but anomalous melanin pigmentation is an aesthetic problem in human beings. Moreover, the formation of neuromelanin in human brain could contribute to the neurodegeneration associated with Parkinson's disease. Finally, tyrosinase is also responsible for undesired browning in fruits and vegetables. These topics encouraged the search for new inhibitors of this enzyme for pharmaceutical, cosmetic and foods industries. This review is to report recent trends in the discovery of tyrosinase inhibitors from plant sources, to provide a rationale for the continued study of natural tyrosinase inhibitors, and to recognise the potential therapeutic rewards associated with the identification of these agents.
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Affiliation(s)
- Marco Bonesi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Cosenza, Italy
| | - Jianbo Xiao
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Control in Chinese Medicine, University of Macau, Avenida da Universidade Macau, Macau, China
| | - Rosa Tundis
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Cosenza, Italy
| | - Francesca Aiello
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Cosenza, Italy
| | - Vincenzo Sicari
- Department of Agricultural Science, Mediterranean University of Reggio Calabria, Via Graziella, Feo di Vito, 89123 Reggio, Calabria, Italy
| | - Monica R Loizzo
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Cosenza, Italy
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Intramelanocytic Acidification Plays a Role in the Antimelanogenic and Antioxidative Properties of Vitamin C and Its Derivatives. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:2084805. [PMID: 31214276 PMCID: PMC6535878 DOI: 10.1155/2019/2084805] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 03/31/2019] [Indexed: 12/31/2022]
Abstract
Although vitamin C (VC, L-ascorbic acid) has been widely used as a skin lightening agent for a long time, the mechanism by which it inhibits melanogenesis remains poorly understood. It is well-documented that the intramelanocytic pH is an important factor in regulating tyrosinase function and melanosome maturation. The activity of tyrosinase, the rate-limiting enzyme required for melanin synthesis, is generally minimal in an acidic environment. Given that VC is an acidic compound, we might speculate that the intracellular acidification of melanocytes induced by VC likely reduces melanin content through the suppression of tyrosinase activity. The results of this study reveal that treatment of melanocytes with VC or its derivatives, magnesium ascorbyl phosphate (MAP) and 3-O-ethyl-L-ascorbic acid (AAE), resulted in significant decreases in the tyrosinase activity and melanin content and in the levels of intracellular reactive oxygen species (ROS), indicating that VC and its derivatives possess antimelanogenic and antioxidative activities. Western blotting analysis indicated that VC, MAP, and AAE exert their antimelanogenic activity by inhibiting the tyrosinase activity rather than by downregulating the expression of melanogenic proteins such as tyrosinase, premelanosome protein 17 (Pmel17) and microphthalmia-associated transcription factor (MITF). Further, we found that the reduced tyrosinase activity of melanocytes treated with VC or its derivatives could be reactivated following intracellular neutralization induced by ammonium chloride (NH4Cl) or concanamycin A (Con A). Finally, we examined the expression of sodium-dependent VC transporter-2 (SVCT-2) using western blotting and qPCR, which revealed that there was a significant increase in the expression of SVCT-2 in melanocytes following treatment with VC. VC-mediated intracellular acidification was neutralized by phloretin (a putative SVCT-2 inhibitor) in a dose-dependent manner. Taken together, these data show that VC and its derivatives suppress tyrosinase activity through cytoplasmic acidification that potentially results from enhanced VC transmembrane transport via the VC transporter SVCT-2.
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Nakamura M, Haarmann-Stemmann T, Krutmann J, Morita A. Alternative test models for skin ageing research. Exp Dermatol 2018; 27:495-500. [DOI: 10.1111/exd.13519] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Motoki Nakamura
- Department of Geriatric and Environmental Dermatology; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
| | | | - Jean Krutmann
- IUF-Leibniz Research Institute for Environmental Medicine; Düsseldorf Germany
- Medical Faculty; Heinrich-Heine-University; Düsseldorf Germany
| | - Akimichi Morita
- Department of Geriatric and Environmental Dermatology; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
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Garcia-Jimenez A, Teruel-Puche JA, Garcia-Ruiz PA, Berna J, Rodríguez-López JN, Tudela J, Garcia-Canovas F. Action of 2,2',4,4'-tetrahydroxybenzophenone in the biosynthesis pathway of melanin. Int J Biol Macromol 2017; 98:622-629. [PMID: 28192140 DOI: 10.1016/j.ijbiomac.2017.02.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 02/06/2017] [Accepted: 02/08/2017] [Indexed: 11/16/2022]
Abstract
2,2',4,4'-tetrahydroxybenzophenone (Uvinul D50), a sunscreen used in cosmetics, has two effects in the melanin biosynthesis pathway. On the one hand, it acts a weak inhibitor of tyrosinase and on the other, it accelerates the conversion of dopachrome to melanin. Uvinul D50 was seen to behave as a weak competitive inhibitor: apparent constant inhibition=2.02±0.09mM and IC50=3.82±0.39mM established in this work. These values are higher than those in the bibliography, which tend to be undersetimated. This discrepancy could be explained by the reaction of Uvinul D50 with the dopachrome produced from l-tyrosine or l-dopa, which would interfere in the measurement. Based on studies of its docking to tyrosinase, it seems that Uvinul D50 interacts with the active site of the enzyme (oxytyrosinase) both in its protonated and deprotonated forms (pKa=7). However, it cannot be hydroxylated, meaning that it acts as a weak inhibitor, not as an alternative substrate, despite its resorcinol structure. Uvinul D50 can be used as sunscreen, in low concentrations without significant adverse effects on melanogenesis.
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Affiliation(s)
- Antonio Garcia-Jimenez
- GENZ-Group of Research on Enzymology(1), Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, E-30100, Espinardo, Murcia, Spain
| | - Jose Antonio Teruel-Puche
- Group of Molecular Interactions in Membranes, Department of Biochemistry and Molecular Biology-A, University of Murcia, E-30100, Espinardo, Murcia, Spain
| | - Pedro Antonio Garcia-Ruiz
- University of Murcia, Faculty of Veterinary, Group of Chemistry of Carbohydrates, Industrial Polymers and Additives, Department of Organic Chemistry, 30100 Murcia, Spain
| | - Jose Berna
- Group of Synthetic Organic Chemistry, Department of Organic Chemistry, Faculty of Chemistry, University of Murcia, E-30100, Espinardo, Murcia, Spain
| | - Jose Neptuno Rodríguez-López
- GENZ-Group of Research on Enzymology(1), Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, E-30100, Espinardo, Murcia, Spain
| | - Jose Tudela
- GENZ-Group of Research on Enzymology(1), Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, E-30100, Espinardo, Murcia, Spain
| | - Francisco Garcia-Canovas
- GENZ-Group of Research on Enzymology(1), Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, E-30100, Espinardo, Murcia, Spain.
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Al-Amin M, Cao J, Naeem M, Banna H, Kim MS, Jung Y, Chung HY, Moon HR, Yoo JW. Increased therapeutic efficacy of a newly synthesized tyrosinase inhibitor by solid lipid nanoparticles in the topical treatment of hyperpigmentation. Drug Des Devel Ther 2016; 10:3947-3957. [PMID: 27980392 PMCID: PMC5144896 DOI: 10.2147/dddt.s123759] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Hyperpigmentation caused by melanin overproduction is a major skin disorder in humans. Inhibition of tyrosinase, a key regulator of melanin production, has been used as an effective strategy to treat hyperpigmentation. In this study, we investigated the use of solid lipid nanoparticles (SLNs) as a highly effective and nontoxic means to deliver a newly synthesized potent tyrosinase inhibitor, MHY498, and to target melanocytes through the skin. MHY498-loaded SLNs (MHY-SLNs) were prepared by an oil-in-water emulsion solvent-evaporation method, and their morphological and physicochemical properties were characterized. MHY-SLNs showed a prolonged drug-release profile and higher skin permeation than that of MHY solution. In an in vivo evaluation of antimelanogenic activity, MHY-SLNs showed a prominent inhibitory effect against ultraviolet B-induced melanogenesis, resulting in no change in the skin color of C57BL/6 mouse, compared with that observed in an MHY solution-treated group and an untreated control group. The antimelanogenic effect of MHY-SLNs was further confirmed through Fontana-Masson staining. Importantly, MHY-SLNs did not induce any toxic effects in the L929 cell line. Overall, these data indicate that MHY-SLNs show promise in the topical treatment of hyperpigmentation.
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Affiliation(s)
- Md Al-Amin
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Jiafu Cao
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Muhammad Naeem
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Hasanul Banna
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Min-Soo Kim
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Yunjin Jung
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Hae Young Chung
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Hyung Ryong Moon
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Jin-Wook Yoo
- College of Pharmacy, Pusan National University, Busan, South Korea
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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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