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Abu-Izneid T, Rauf A, Naz S, Ibrahim M, Muhammad N, Wadood A, Ajmal A, Hemeg HA, Fahad S, Thiruvengadam M, Venkidasamy B. In vivo biological screening of extract and bioactive compound from Ficus benghalensis L. and their in silico molecular docking analysis. Technol Health Care 2024:THC231703. [PMID: 39031400 DOI: 10.3233/thc-231703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2024]
Abstract
BACKGROUND Ficus benghalensis has been used by local health care practitioners to treat pain, inflammation, rheumatism, and other health issues. OBJECTIVE In this study, the crude extract and diverse fractions, along with the isolated compound of F. benghalensis were examined for their roles as muscle relaxants, analgesics, and sedatives. METHODS The extract and isolated compound 1 were screened for muscle-relaxant, analgesic, and sedative actions. The acetic acid-mediated writhing model was utilized for analgesic assessment, the muscle relaxant potential was quantified through traction and inclined plan tests, and the open field test was applied for sedative effects. RESULTS The extract/fractions (25, 50, and 100 mg/kg) and isolated compounds (2.5, 5, 10, and 20 mg/kg) were tested at various doses. A profound (p< 0.001) reduce in the acetic acid-mediated writhing model was observed against carpachromene (64.44%), followed by ethyl acetate (60.67%) and methanol (58.42%) fractions. A marked (p< 0.001) muscle relaxant activity was noticed against the isolated compound (71.09%), followed by ethyl acetate (66.98%) and methanol (67.10%) fractions. Regarding the sedative effect, a significant action was noted against the isolated compound (71.09%), followed by ethyl acetate (66.98%) and methanol (67.10%) fractions. Furthermore, the binding modes of the isolated compounds were explored using molecular docking. The molecular docking study revealed that the isolated compound possessed good binding affinity for COX2 and GABA. Our isolated compound may possess inhibitory activity against COX2 and GABA receptors. CONCLUSION The extract and isolated compounds of Ficus benghalensis can be used as analgesics, muscle relaxants, and sedatives. However, detailed molecular and functional analyses are essential to ascertain their function as muscle relaxants, analgesics, and sedatives.
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Affiliation(s)
- Tareq Abu-Izneid
- Pharmaceutical Sciences Program, College of Pharmacy, Al Ain University, Al Ain, United Arab Emirates
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Ambar, Pakistan
| | - Saima Naz
- Institute of Biotechnology and Microbiology, Bacha Khan University Charsadda, Pakistan
| | - Muhammad Ibrahim
- Pharmaceutical Sciences Program, College of Pharmacy, Al Ain University, Al Ain, United Arab Emirates
| | - Naveed Muhammad
- Department of Pharmacy, Abdul Wali Khan University, Mardan, Pakistan
| | - Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University, Mardan, Pakistan
| | - Amar Ajmal
- Department of Biochemistry, Abdul Wali Khan University, Mardan, Pakistan
| | - Hassan A Hemeg
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taibah University, Al-Medinah, Al-Monawara, Saudi Arabia
| | - Shah Fahad
- Department of Agronomy, Abdul Wali Khan University, Mardan, Pakistan
| | - Muthu Thiruvengadam
- Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul, Korea
| | - Baskar Venkidasamy
- Department of Oral and Maxillofacial Surgery, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu, India
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Abdulhaniff P, Sakayanathan P, Loganathan C, Iruthayaraj A, Thiyagarajan R, Thayumanavan P. Mammalian maltase-glucoamylase and sucrase-isomaltase inhibitory effects of Artocarpus heterophyllus: An in vitro and in silico approach. Comput Biol Chem 2024; 110:108052. [PMID: 38492557 DOI: 10.1016/j.compbiolchem.2024.108052] [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: 08/20/2023] [Revised: 02/28/2024] [Accepted: 03/09/2024] [Indexed: 03/18/2024]
Abstract
Alpha-glucosidase (maltase, sucrase, isomaltase and glucoamylase) activities which are involved in carbohydrate metabolism are present in human intestinal maltase-glucoamylase (MGAM) and sucrase-isomaltase (SI). Hence, these proteins are important targets to identify drugs against postprandial hyperglycemia thereby for diabetes. To find natural-based drugs against MGAM and SI, Artocarpus heterophyllus leaf was explored for MGAM and SI inhibition in in vitro and in silico. A. heterophyllus leaf aqueous active fraction (AHL-AAF) was prepared using Soxhlet extraction followed by silica column chromatography. The phytoconstituents of AHL-AAF were determined using LC-ESI-MS/MS. AHL-AAF showed dose-dependent and mixed inhibition against maltase (IC50 = 460 µg/ml; Ki = 300 µg/ml), glucoamylase (IC50 = 780 µg/ml; Ki = 480 µg/ml), sucrase (IC50 = 900 µg/ml, Ki = 504 µg/ml) and isomaltase (IC50 = 860 µg/ml, Ki = 400 µg/ml). AHL-AAF phytoconstituents interaction with N-terminal (Nt) and C-terminal (Ct) subunits of human MGAM and SI was analyzed using induced-fit docking, molecular dynamics (MD), and binding free energy calculation. In docking studies, rhamnosyl hexosyl methyl quercetin (RHMQ), P-coumaryl-O-16-hydroxy palmitic acid (PCHP), and spirostanol interacted with active site amino acids of human MGAM and SI. Among these RHMQ stably interacted with all the subunits (Nt-MGAM, Ct-MGAM, Nt-SI and Ct-SI) whereas PCHP with Ct-MGAM and Nt-SI during MD analysis. In molecular docking, the docking score of RHMQ with NtMGAM, CtMGAM, NtSI and CtSI was -8.48, -12.88, -11.98 and -11.37 kcal/mol. The docking score of PCHP for CtMGAM and NtSI was -8.59 and -8.4 kcal/mol, respectively. After MD simulation, the root mean square deviation (RMSD) and root mean square fluctuation (RMSF) values further confirmed the stable protein-ligand interaction. The RMSD value of all the complexes were around 2.5 Å and the corresponding RMSF values were also quite low. In MM/GBSA analysis, the involvement of Van der Waals and lipophilic energy in the protein/ligand interactions are understood. Further binding free energy for Nt-MGAM-PCHP, Nt-MGAM-RHMQ, Nt-SI-PCHP, Nt-SI-RHMQ, Ct-MGAM-PCHP, Ct-MGAM-RHMQ and Ct-SI-RHMQ complexes was found to be -24.94, -46.60, -46.56, -44.48, -40.3, -41.86 and -19.39 kcal/mol, respectively. Altogether, AHL-AAF showed inhibition of α-glucosidase activities of MGAM and SI. AHL-AAF could be further studied for its effect on diabetes in in vivo.
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Affiliation(s)
- Parveen Abdulhaniff
- Department of Biochemistry, Periyar University, Salem, Tamil Nadu 636011, India
| | - Penislusshiyan Sakayanathan
- Department of Biochemistry, Periyar University, Salem, Tamil Nadu 636011, India; Bioinnov Solutions LLP, Research and Development Center, Salem, Tamil Nadu 636009, India
| | - Chitra Loganathan
- Bioinnov Solutions LLP, Research and Development Center, Salem, Tamil Nadu 636009, India; Department of Prosthodontics and Implantology, Saveetha Dental College and Hospital, Saveetha Institute of Medical And Technical Sciences (SIMATS), Chennai 600077, India
| | - Ancy Iruthayaraj
- Bioinnov Solutions LLP, Research and Development Center, Salem, Tamil Nadu 636009, India
| | - Ramesh Thiyagarajan
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Kingdom of Saudi Arabia
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Lee J, Jeong Y, Jin Jung H, Ullah S, Ko J, Young Kim G, Yoon D, Hong S, Kang D, Park Y, Chun P, Young Chung H, Ryong Moon H. Anti-tyrosinase flavone derivatives and their anti-melanogenic activities: Importance of the β-phenyl-α,β-unsaturated carbonyl scaffold. Bioorg Chem 2023; 135:106504. [PMID: 37015153 DOI: 10.1016/j.bioorg.2023.106504] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/16/2023] [Accepted: 03/26/2023] [Indexed: 04/03/2023]
Abstract
Flavone derivatives were designed and synthesized based on the hypothesis that flavones containing the β-phenyl-α,β-unsaturated carbonyl (PUSC) scaffold have potential anti-tyrosinase activity. Flavones 1a and 1e inhibited mushroom tyrosinase more potently than kojic acid, and 1e inhibited monophenolase and diphenolase 61- and 28-fold more than kojic acid, respectively. Kinetic studies on mushroom tyrosinase indicated that 1a and 1e competitively inhibit monophenolase and diphenolase, and docking results supported these results. In an in vitro assay using B16F10 murine cells, 1a and 1e inhibited melanin production more potently than kojic acid, and this was attributed to the inhibition of tyrosinase. Furthermore, 1a and 1e strongly scavenged DPPH and ABTS radicals and ROS, which suggested that their antioxidant properties were at least partly responsible for their anti-melanogenic effects. Moreover, flavone 1a also inhibited the gene expressions of the melanogenesis-related genes tyrosinase, tyrosinase-related protein (TRP)-1, and TRP-2. Our findings that flavone derivatives (i) directly inhibit tyrosinase, (ii) act as antioxidants, and (iii) inhibit the expressions of melanogenesis-related genes suggest their potential use as natural melanogenesis inhibitors. Furthermore, the study confirms that the PUSC scaffold confers anti-tyrosinase activity.
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Marinaccio L, Zengin G, Pieretti S, Minosi P, Szucs E, Benyhe S, Novellino E, Masci D, Stefanucci A, Mollica A. Food-inspired peptides from spinach Rubisco endowed with antioxidant, antinociceptive and anti-inflammatory properties. Food Chem X 2023; 18:100640. [PMID: 37008720 PMCID: PMC10064441 DOI: 10.1016/j.fochx.2023.100640] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 02/22/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
Rubiscolin-6 (amino acid sequence: YPLDLF) is a selective δ-opioid receptor peptide isolated from spinach Rubisco. Its synthetic analogue, peptide YPMDIV is the most potent described so far for its increased opioid activity, thus in this work it was considered as lead compound for the design of twelve new analogues e.g. LMAS1-12. Firstly all the novel compounds have been tested for their antinociceptive and anti-inflammatory capacity in vitro and in vivo in order to evaluate their ability to maintain or loss the original activity. Among them peptides LMAS5-8 gave the best results, thus their antioxidant properties have been investigated along with their enzymatic inhibitory ability. Peptide LMAS6 shows a strong antioxidant (154.25 mg TE/g CUPRAC) and inhibitor activity on tyrosinase (84.49 mg KAE/g), indicating a potential role in food industry as anti-browning agent, while peptides LMAS5 and LMAS7 possess a modest cholinesterase inhibitory activity suggesting a conceivable use for nutraceuticals production.
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Affiliation(s)
- Lorenza Marinaccio
- Department of Pharmacy, G. d’Annunzio University of Chieti-Pescara, Chieti 66100, Italy
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya 42130, Turkey
| | - Stefano Pieretti
- National Centre for Drug Research and Evaluation, Istituto Superiore di Sanità, Rome 00161, Italy
| | - Paola Minosi
- National Centre for Drug Research and Evaluation, Istituto Superiore di Sanità, Rome 00161, Italy
| | - Edina Szucs
- Institute of Biochemistry, Biological Research Centre, Szeged 6726, Hungary
| | - Sandor Benyhe
- Institute of Biochemistry, Biological Research Centre, Szeged 6726, Hungary
| | - Ettore Novellino
- NGN Healthcare, Mercogliano, 207, Via Nazionale Torrette 83013, Italy
| | - Domiziana Masci
- Department of Basic Biotechnological Sciences, Intensivological and Perioperative Clinics, Catholic University of Sacred Heart, Largo Francesco Vito 1, Rome 00168, Italy
| | - Azzurra Stefanucci
- Department of Pharmacy, G. d’Annunzio University of Chieti-Pescara, Chieti 66100, Italy
- Corresponding author.
| | - Adriano Mollica
- Department of Pharmacy, G. d’Annunzio University of Chieti-Pescara, Chieti 66100, Italy
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Chemical Constituents from Streblus taxoides Wood with Their Antibacterial and Antityrosinase Activities Plus in Silico Study. Antibiotics (Basel) 2023; 12:antibiotics12020319. [PMID: 36830230 PMCID: PMC9952338 DOI: 10.3390/antibiotics12020319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/28/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023] Open
Abstract
Hyperpigmentation frequently occurs after inflammation from bacterial infection. Thus, the inhibition activity of tyrosinase, the key enzyme to catalyze the melanogenesis and/or inhibition of bacterial infection, could decrease melanin production. Hence, the potential inhibitors could be discovered from natural products. ω-Hydroxymoracin C (1), a new compound with two other 2-arylbenzofurans, i.e., moracin M (2) and moracin C (3), and two stilbenes, i.e., 3, 4, 3', 5'-tetrahydroxybibenzyl (4) and piceatannol (5), were isolated from the wood of Streblus taxoides. Compound 4 showed a strong inhibitory activity against tyrosinase enzyme with an IC50 value of 35.65 µg/mL, followed by compound 2 with an IC50 value of 47.34 µg/mL. Conversely, compound 1, 3 and 5 showed moderate activity, with IC50 values of 109.64, 128.67 and 149.73 µg/mL, respectively. Moreover, compound 1 and 3 showed an antibacterial effect against some Staphylococcus spp. Thus, the isolated compounds exhibited potential antityrosine and antibacterial effects. Additionally, an in silico study was performed in order to predict theoretical molecular interactions between the obtained metabolites from S. taxoides and tyrosinase as an extended in vitro enzyme binding assay experiment.
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Inhibition Mechanism of Components Isolated from Morus alba Branches on Diabetes and Diabetic Complications via Experimental and Molecular Docking Analyses. Antioxidants (Basel) 2022; 11:antiox11020383. [PMID: 35204264 PMCID: PMC8869400 DOI: 10.3390/antiox11020383] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023] Open
Abstract
Previously, we reported the anti-diabetic effect of Morus alba root bark and the compounds therein. In our continuous study of other parts of this plant, the ability of the branch of Morus alba to inhibit α-glucosidase, protein tyrosine phosphatase 1B (PTP1B), and advanced glycation end products (AGEs) formation was evaluated. Moreover, there are no previous studies that have performed enzyme kinetics and molecular docking analyses, along with assessments of peroxynitrite (ONOO−) inhibitory activities. Since the Morus alba branch exhibited favorable inhibitory effects, repeated column chromatography was performed to obtain eight compounds, including four flavonoids (1, 3, 6, 8), one arylbenzofuran (2), one stilbene (5), one Diels–Alder-type adduct (7), and one sterol (4). Among them, compounds 1–3 and 5–7 were mixed-type inhibitors of α-glucosidase, sharing the same catalytic residues with acarbose and the same allosteric sites with (Z)-3-bytylidenephthalide. On the other hand, kuwanon C (1) and oxyresveratrol (5) interacted with residues of the allosteric site (α3 and α6 helices) of PTP1B, indicating their use as non-competitive inhibitors. Interestingly, kuwanon G (7) directly bound the catalytic site, or interrupted the binding between the substrate and the active site, as a mixed-type inhibitor. Moreover, most of the compounds exhibited greater activity against AGE formation and ONOO− than positive controls. The IC50 values required to inhibit ONOO− using compounds 1, 3, 5, 6, and 7 were reported for the first time, and range from 1.08 to 12.92 μM. Based on the structure–activity relationship, the presence of hydroxyl, resorcinol, and prenyl moieties was important in the prevention of diabetes’ pathological mechanisms, and these findings have been further supported by molecular docking analysis. These computational and experimental results will be useful in the development of therapeutic candidates to prevent/treat diabetes and its complications.
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Gupta A, Marquess AR, Pandey AK, Bishayee A. Jackfruit ( Artocarpus heterophyllus Lam.) in health and disease: a critical review. Crit Rev Food Sci Nutr 2022; 63:6344-6378. [PMID: 35144492 DOI: 10.1080/10408398.2022.2031094] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Artocarpus heterophyllus Lam. (Family Moraceae), is a tropical tree, native to India and common in Asia, Africa, and several regions in South America. The fruit is commonly known as jackfruit which is one of the largest edible fruits in the world. Jackfruits comprises a wide range of nutrients, including minerals, carbohydrates, volatile compounds, proteins, and vitamins. The fruit, bark, leaves, and roots are endowed with therapeutic attributes and are utilized in the many traditional medicinal systems for the management of various ailments. Fruit and seeds are commonly used to prepare various food items, including sauce, ice creams, jams, jellies, and marmalades. Due to unique texture, jackfruit is becoming a popular meat substitute. Based on preclinical studies, jackfruit exhibits antimicrobial, antioxidant, anti-melanin, antidiabetic, anti-inflammatory, immunomodulatory, antiviral, anthelmintic, wound-healing, and antineoplastic activities. Clinical studies reveal that the leaves possess antidiabetic action in healthy and insulin-independent diabetic individuals. Despite numerous health benefits, regrettably, jackfruit has not been properly utilized in a marketable scale in areas where it is produced. This review delivers an updated, comprehensive, and critical evaluation on the nutritional value, phytochemical profiling, pharmacological attributes and underlying mechanisms of action to explore the full potential of jackfruit in health and disease.
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Affiliation(s)
- Ashutosh Gupta
- Department of Biochemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Alexis R Marquess
- College of Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, Florida, USA
| | - Abhay Kumar Pandey
- Department of Biochemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Anupam Bishayee
- College of Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, Florida, USA
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Alaaeldin R, Abdel-Rahman IAM, Hassan HA, Youssef N, Allam AE, Abdelwahab SF, Zhao QL, Fathy M. Carpachromene Ameliorates Insulin Resistance in HepG2 Cells via Modulating IR/IRS1/PI3k/Akt/GSK3/FoxO1 Pathway. Molecules 2021; 26:7629. [PMID: 34946711 PMCID: PMC8708443 DOI: 10.3390/molecules26247629] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 12/07/2021] [Accepted: 12/14/2021] [Indexed: 02/05/2023] Open
Abstract
Insulin resistance contributes to several disorders including type 2 diabetes and cardiovascular diseases. Carpachromene is a natural active compound that inhibits α-glucosidase enzyme. The aim of the present study is to investigate the potential activity of carpachromene on glucose consumption, metabolism and insulin signalling in a HepG2 cells insulin resistant model. A HepG2 insulin resistant cell model (HepG2/IRM) was established. Cell viability assay of HepG2/IRM cells was performed after carpachromene/metformin treatment. Glucose concentration and glycogen content were determined. Western blot analysis of insulin receptor, IRS1, IRS2, PI3k, Akt, GSK3, FoxO1 proteins after carpachromene treatment was performed. Phosphoenolpyruvate carboxykinase (PEPCK) and hexokinase (HK) enzymes activity was also estimated. Viability of HepG2/IRM cells was over 90% after carpachromene treatment at concentrations 6.3, 10, and 20 µg/mL. Treatment of HepG2/IRM cells with carpachromene decreased glucose concentration in a concentration- and time-dependant manner. In addition, carpachromene increased glycogen content of HepG2/IRM cells. Moreover, carpachromene treatment of HepG2/IRM cells significantly increased the expression of phosphorylated/total ratios of IR, IRS1, PI3K, Akt, GSK3, and FoxO1 proteins. Furthermore, PEPCK enzyme activity was significantly decreased, and HK enzyme activity was significantly increased after carpachromene treatment. The present study examined, for the first time, the potential antidiabetic activity of carpachromene on a biochemical and molecular basis. It increased the expression ratio of insulin receptor and IRS1 which further phosphorylated/activated PI3K/Akt pathway and phosphorylated/inhibited GSK3 and FoxO1 proteins. Our findings revealed that carpachromene showed central molecular regulation of glucose metabolism and insulin signalling via IR/IRS1/ PI3K/Akt/GSK3/FoxO1 pathway.
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Affiliation(s)
- Rania Alaaeldin
- Department of Biochemistry, Faculty of Pharmacy, Deraya University, Minia 61111, Egypt;
| | - Iman A. M. Abdel-Rahman
- Department of Pharmacognosy, Faculty of Pharmacy, South Valley University, Qena 83523, Egypt;
| | - Heba Ali Hassan
- Department of Pharmacognosy, Faculty of Pharmacy, Sohag University, Sohag 82524, Egypt;
| | - Nancy Youssef
- Department of Clinical Pathology, Faculty of Medicine, Minia University, Minia 61512, Egypt;
| | - Ahmed E. Allam
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Assiut 71524, Egypt;
| | - Sayed F. Abdelwahab
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Taif University, Taif 21944, Saudi Arabia;
| | - Qing-Li Zhao
- Department of Radiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - Moustafa Fathy
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
- Department of Regenerative Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
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Bakthadoss M, Agarwal V, Tadiparthi TR, Mohammad M. Domino ring opening and selective O/S-alkylation of cyclic ethers and thioethers. Mol Divers 2021; 25:2467-2478. [PMID: 32462464 DOI: 10.1007/s11030-020-10105-2] [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: 03/31/2020] [Accepted: 05/13/2020] [Indexed: 10/24/2022]
Abstract
Chemoselective domino ring opening and selective O/S-alkylation of ethers/thioethers over enol C/O alkylation has been observed. Various 2-aryl chromanones/thiochromanones with alkyl/allyl bromides were smoothly converted into the corresponding highly functionalized ethers and thioethers in excellent yields with high selectivity. An unusual, chemoselective domino ring opening and selective ether/thioether O/S-alkylation over. An unusual, chemoselective domino ring opening and selective ether/thioether O/S alkylation over enol C/O alkylation has been observed.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India.
| | - Vishal Agarwal
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
| | | | - Mushaf Mohammad
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
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Design, synthesis, and biological evaluation of symmetrical azine derivatives as novel tyrosinase inhibitors. BMC Chem 2021; 15:54. [PMID: 34587988 PMCID: PMC8480273 DOI: 10.1186/s13065-021-00780-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/15/2021] [Indexed: 12/23/2022] Open
Abstract
A series of symmetrical azine derivatives containing different substituted benzyl moieties were designed, synthesized, and evaluated for their inhibitory activity against tyrosinase. The results showed that compounds 3e, 3f, 3h, 3i, 3j, and 3k possess effective tyrosinase inhibition with IC50 values ranging from 7.30 μM to 62.60 μM. Particularly, compounds 3f displayed around three-fold improvement in the potency (IC50 = 7.30 ± 1.15 μM) compared to that of kojic acid (IC50 = 20.24 ± 2.28 μM) as the positive control. Kinetic study of compound 3f confirmed uncompetitive inhibitory activity towards tyrosinase indicating that it can bind to enzyme–substrate complex. Next, molecular docking analysis was performed to study the interactions and binding mode of the most potent compound 3f in the tyrosinase active site. Besides, the cytotoxicity of 3f, as well as its potency to reduce the melanin content were also measured on invasive melanoma B16F10 cell line. Also, 3f exhibited above 82% cell viability in the A375 cell line at 10 µM. Consequently, compounds 3f could be introduced as a potent tyrosinase inhibitor that might be a promising candidate in the cosmetics, medicine, and food industry.
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Ko W, Kim N, Lee H, Woo ER, Kim YC, Oh H, Lee DS. Anti-Inflammatory Effects of Compounds from Cudrania tricuspidata in HaCaT Human Keratinocytes. Int J Mol Sci 2021; 22:ijms22147472. [PMID: 34299094 PMCID: PMC8303187 DOI: 10.3390/ijms22147472] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 11/29/2022] Open
Abstract
The root bark of Cudrania tricuspidata has been reported to have anti-sclerotic, anti-inflammatory, antioxidant, neuroprotective, hepatoprotective, and cytotoxic activities. In the present study, the effect of 16 compounds from C. tricuspidata on tumor necrosis factor-α+interferon-γ-treated HaCaT cells were investigated. Among these 16 compounds, 11 decreased IL-6 production and 15 decreased IL-8 production. The six most effective compounds, namely, steppogenin (2), cudraflavone C (6), macluraxanthone B (12), 1,6,7-trihydroxy-2-(1,1-dimethyl-2-propenyl)-3- methoxyxanthone (13), cudraflavanone B (4), and cudratricusxanthone L (14), were selected for further experiments. These six compounds decreased the expression levels of chemokines, such as regulated on activation, normal T cell expressed and secreted (RANTES) and thymus and activation-regulated chemokine (TARC), and downregulated the protein expression levels of intercellular adhesion molecule-1. Compounds 2, 6, 12, 4, and 14 inhibited nuclear factor-kappa B p65 translocation to the nucleus; however, compound 13 showed no significant effects. In addition, extracellular signal regulatory kinase-1/2 phosphorylation was only inhibited by compound 14, whereas p38 phosphorylation was inhibited by compounds 13 and 4. Taken together, the compounds from C. tricuspidata showed potential to be further developed as therapeutic agents to suppress inflammation in skin cells.
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Affiliation(s)
- Wonmin Ko
- College of Pharmacy, Chosun University, Gwangju 61452, Korea; (W.K.); (N.K.); (H.L.); (E.-R.W.)
| | - Nayeon Kim
- College of Pharmacy, Chosun University, Gwangju 61452, Korea; (W.K.); (N.K.); (H.L.); (E.-R.W.)
| | - Hwan Lee
- College of Pharmacy, Chosun University, Gwangju 61452, Korea; (W.K.); (N.K.); (H.L.); (E.-R.W.)
| | - Eun-Rhan Woo
- College of Pharmacy, Chosun University, Gwangju 61452, Korea; (W.K.); (N.K.); (H.L.); (E.-R.W.)
| | - Youn-Chul Kim
- Institute of Pharmaceutical Research and Development, College of Pharmacy, Wonkwang University, Iksan 54538, Korea; (Y.-C.K.); (H.O.)
| | - Hyuncheol Oh
- Institute of Pharmaceutical Research and Development, College of Pharmacy, Wonkwang University, Iksan 54538, Korea; (Y.-C.K.); (H.O.)
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, Iksan 54538, Korea
| | - Dong-Sung Lee
- College of Pharmacy, Chosun University, Gwangju 61452, Korea; (W.K.); (N.K.); (H.L.); (E.-R.W.)
- Correspondence: ; Tel.: +82-62-230-6386; Fax: +82-62-222-5414
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12
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Tamafo Fouegue AD, Tedongmo H, Abdoul Ntieche R, Ghogomu JN. DFT insights into the structure, reactivity and radical scavenging activity of cycloartocarpesin. J PHYS ORG CHEM 2021. [DOI: 10.1002/poc.4245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Aymard Didier Tamafo Fouegue
- Department of Chemistry, Higher Teacher Training College Bertoua The University of Ngaoundéré Bertoua Cameroon
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, Faculty of Science The University of Dschang Dschang Cameroon
| | - Hilaire Tedongmo
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, Faculty of Science The University of Dschang Dschang Cameroon
| | - Rahman Abdoul Ntieche
- Department of Chemistry, Higher Teacher Training College Bertoua The University of Ngaoundéré Bertoua Cameroon
| | - Julius Numbonui Ghogomu
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, Faculty of Science The University of Dschang Dschang Cameroon
- Department of Chemistry, Faculty of Science The University of Bamenda Bamenda Cameroon
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13
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Comunian T, Babazadeh A, Rehman A, Shaddel R, Akbari-Alavijeh S, Boostani S, Jafari S. Protection and controlled release of vitamin C by different micro/nanocarriers. Crit Rev Food Sci Nutr 2020; 62:3301-3322. [DOI: 10.1080/10408398.2020.1865258] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- T. Comunian
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, Brazil
| | - A. Babazadeh
- Center for Motor Neuron Disease Research, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
| | - A. Rehman
- State Key Laboratory of Food Science and Technology, Jiangnan University, Jiangsu, Wuxi, China
| | - R. Shaddel
- Department of Food Science and Technology, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - S. Akbari-Alavijeh
- Department of Food Science and Technology, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - S. Boostani
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran
| | - S.M. Jafari
- Faculty of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
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Hassan HA, Allam AE, Abu-Baih DH, Mohamed MFA, Abdelmohsen UR, Shimizu K, Desoukey SY, Hayallah AM, Elrehany MA, Mohamed KM, Kamel MS. Isolation and characterization of novel acetylcholinesterase inhibitors from Ficus benghalensis L. leaves. RSC Adv 2020; 10:36920-36929. [PMID: 35517980 PMCID: PMC9057082 DOI: 10.1039/d0ra06565j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/19/2020] [Indexed: 01/31/2023] Open
Abstract
Metabolic profiling of the crude methanolic extract of Ficus benghalensis leaves has revealed the presence of different phenolic and nitrogenous compounds including cerebrosides and tetrapyrrole pigments. A phytochemical study of the ethyl acetate fraction resulted in the identification of three known compounds, namely carpachromene (1), alpha amyrine acetate (2), and mucusoside (3) together with one new fatty acid glycoside, named 2-O-α-l-rhamnopyranosyl-hexacosanoate-β-d-glucopyranosyl ester (4). The compounds were identified using 1D, 2D NMR, and HR-ESIMS techniques as well as via comparison to other literature. Studies on the acetylcholinesterase inhibition potential and antioxidant activity were carried out on the total methanolic leaf extract, ethyl acetate fraction, and the isolated compounds. The results revealed the potent acetylcholinesterase inhibition of mucusoside alongside a new compound. Docking studies were also performed to confirm the possible interaction between the isolated compounds and acetylcholinesterase accompanying Alzheimer's disease progress.
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Affiliation(s)
- Heba Ali Hassan
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia City 61111 Egypt
| | - Ahmed E Allam
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University Assiut 71524 Egypt
| | - Dalia H Abu-Baih
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Deraya University, Universities Zone New Minia City 61111 Egypt
| | - Mamdouh F A Mohamed
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sohag University 82524 Sohag Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia City 61111 Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University Minia 61519 Egypt
| | - Kuniyoshi Shimizu
- Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Fukuoka 819-0395 Japan
| | - Samar Y Desoukey
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University Minia 61519 Egypt
| | - Alaa M Hayallah
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, Universities Zone New Minia City 61111 Egypt
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Assiut University Assiut 71526 Egypt
| | - Mahmoud A Elrehany
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Deraya University, Universities Zone New Minia City 61111 Egypt
| | - Khaled M Mohamed
- Department of Pharmacognosy, Faculty of Pharmacy, Fayoum University Fayoum 63514 Egypt
| | - Mohamed S Kamel
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia City 61111 Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University Minia 61519 Egypt
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Introducing nano/microencapsulated bioactive ingredients for extending the shelf-life of food products. Adv Colloid Interface Sci 2020; 282:102210. [PMID: 32726708 DOI: 10.1016/j.cis.2020.102210] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 05/07/2020] [Accepted: 07/04/2020] [Indexed: 12/31/2022]
Abstract
The shelf-life of foods is affected by several aspects, mainly chemical and microbial events, resulting in a considerable decline in consumer's acceptance. There is an increasing interest to substitute synthetic preservatives with the plant-based bioactive ingredients which are safe and natural. However, full implementation of this replacement is postponed by some challenges associated with bioactive ingredients, including their low chemical stability, off-flavor, low solubility, and short-term effectiveness. Encapsulation could overcome these limitations. The present review explains current trends in applying natural encapsulated ingredients for food preservation based on a classified description including essential oils, plant extracts, phenolics, carotenoids, etc. and their application for extending food shelf-life mostly dealing with antimicrobial, ant-browning and antioxidant properties. Encapsulation techniques, especially nanoencapsulation, is a promising strategy to overcome their limitations. Moreover, better results are obtained using a combination of proteins and polysaccharides as wall materials than single polymers. The encapsulation method and type of encapsulants highly influences the releasing mechanism and physicochemical properties of bioactive ingredients. These factors together with optimizing the conditions of encapsulation process leads to a cost-effective and well encapsulated ingredient which is more efficient than its free form in shelf-life improvement. It has been shown that the well-designed encapsulation systems, finally, boost the shelf-life-promoting functions of the bioactive ingredients, mostly due to enhancing their solubility, homogeneity in food matrices and contact surface with deteriorative agents, and providing their prolonged presence over food storage and processing via increasing the thermal and processing stability of bioactive compounds, as well as controlling their release on food surfaces, or/and within food packages. To this end and given the numerous wall and bioactive core substances available, further studies are needed to evaluate the efficiency of many encapsulated forms of both conventional and novel bioactive ingredients in food shelf-life extending since the interactions and anti-spoiling behaviors of the ingredients in various encapsulation systems and foodstuffs are highly variable that should be optimized and characterized before any industrial application.
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Ko W, Yoon CS, Kim KW, Lee H, Kim N, Woo ER, Kim YC, Kang DG, Lee HS, Oh H, Lee DS. Neuroprotective and Anti-Inflammatory Effects of Kuwanon C from Cudrania tricuspidata Are Mediated by Heme Oxygenase-1 in HT22 Hippocampal Cells, RAW264.7 Macrophage, and BV2 Microglia. Int J Mol Sci 2020; 21:ijms21144839. [PMID: 32650596 PMCID: PMC7402286 DOI: 10.3390/ijms21144839] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/22/2022] Open
Abstract
Heme oxygenase (HO)-1 is a detoxifying phase II enzyme that plays a role in both inflammatory and oxidative stress responses. Curdrania tricuspidata is widespread throughout East Asia and is used as a therapeutic agent in traditional medicine. We investigated whether treatment with sixteen flavonoid or xanthone compounds from C. tricuspidata could induce HO-1 expression in HT22 hippocampal cells, RAW264.7 macrophage, and BV2 microglia. In these compounds, kuwanon C showed the most remarkable HO-1 expression effects. In addition, treatment with kuwanon C reduced cytoplasmic nuclear erythroid 2-related factor (Nrf2) expression and increased Nrf2 expression in the nucleus. Significant inhibition of glutamate-induced oxidative injury and induction of reactive oxygen species (ROS) occurred when HT22 hippocampal cells were pretreated with kuwanon C. The levels of inflammatory mediator and cytokine, which increased following lipopolysaccharide (LPS) stimulation, were suppressed in RAW264.7 macrophage and BV2 microglia after kuwanon C pretreatment. Kuwanon C also attenuated p65 DNA binding and translocation into the nucleus in LPS-induced RAW264.7 and BV2 cells. The anti-inflammatory, anti-neuroinflammatory, and neuroprotective effects of kuwanon C were reversed when co-treatment with HO-1 inhibitor of tin protoporphyrin-IX (SnPP). These results suggest that the neuroprotective and anti-inflammatory effects of kuwanon C are regulated by HO-1 expression.
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Affiliation(s)
- Wonmin Ko
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Korea; (W.K.); (H.L.); (N.K.); (E.-R.W.)
| | - Chi-Su Yoon
- Institute of Pharmaceutical Research and Development, College of Pharmacy, Wonkwang University, Iksan 54538, Korea; (C.-S.Y.); (K.-W.K.); (Y.-C.K.); (H.O.)
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, Iksan 54538, Korea; (D.G.K.); (H.S.L.)
| | - Kwan-Woo Kim
- Institute of Pharmaceutical Research and Development, College of Pharmacy, Wonkwang University, Iksan 54538, Korea; (C.-S.Y.); (K.-W.K.); (Y.-C.K.); (H.O.)
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, Iksan 54538, Korea; (D.G.K.); (H.S.L.)
| | - Hwan Lee
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Korea; (W.K.); (H.L.); (N.K.); (E.-R.W.)
| | - Nayeon Kim
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Korea; (W.K.); (H.L.); (N.K.); (E.-R.W.)
| | - Eun-Rhan Woo
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Korea; (W.K.); (H.L.); (N.K.); (E.-R.W.)
| | - Youn-Chul Kim
- Institute of Pharmaceutical Research and Development, College of Pharmacy, Wonkwang University, Iksan 54538, Korea; (C.-S.Y.); (K.-W.K.); (Y.-C.K.); (H.O.)
| | - Dae Gill Kang
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, Iksan 54538, Korea; (D.G.K.); (H.S.L.)
| | - Ho Sub Lee
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, Iksan 54538, Korea; (D.G.K.); (H.S.L.)
| | - Hyuncheol Oh
- Institute of Pharmaceutical Research and Development, College of Pharmacy, Wonkwang University, Iksan 54538, Korea; (C.-S.Y.); (K.-W.K.); (Y.-C.K.); (H.O.)
- Hanbang Cardio-Renal Syndrome Research Center, Wonkwang University, Iksan 54538, Korea; (D.G.K.); (H.S.L.)
| | - Dong-Sung Lee
- College of Pharmacy, Chosun University, Dong-gu, Gwangju 61452, Korea; (W.K.); (H.L.); (N.K.); (E.-R.W.)
- Correspondence: ; Tel.: +82-62-230-6386; Fax: +82-62-222-5414
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Arroo RRJ, Sari S, Barut B, Özel A, Ruparelia KC, Şöhretoğlu D. Flavones as tyrosinase inhibitors: kinetic studies in vitro and in silico. PHYTOCHEMICAL ANALYSIS : PCA 2020; 31:314-321. [PMID: 31997462 DOI: 10.1002/pca.2897] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 08/08/2019] [Accepted: 10/09/2019] [Indexed: 05/21/2023]
Abstract
INTRODUCTION Tyrosinase is a multifunctional copper-containing oxidase enzyme that catalyses the first steps in the formation of melanin pigments. Identification of tyrosinase inhibitors is of value for applications in cosmetics, medicine and agriculture. OBJECTIVE To develop an analytical method that allows identification of drug-like natural products that can be further developed as tyrosinase inhibitors. Results of in vitro and in silico studies will be compared in order to gain a deeper insight into the mechanism of action of enzyme inhibition. METHOD Using an in vitro assay we tested tyrosinase inhibitor effects of five structurally related flavones, i.e. luteolin (1), eupafolin (2), genkwanin (3), nobiletin (4), and chrysosplenetin (5). The strongest inhibitors were further investigated in silico, using enzyme docking simulations. RESULTS All compounds tested showed modest tyrosinase inhibitory effect compared to the positive control, kojic acid. The polymethoxy flavones 4 and 5 exhibited the strongest tyrosinase inhibitory effect with the half maximal inhibitory concentration (IC50 ) values of 131.92 ± 1.75 μM and 99.87 ± 2.38 μM respectively. According to kinetic analysis 2, 4 and 5 were competitive inhibitors, whereas 1 and 3 were non-competitive inhibitors of tyrosinase. Docking studies indicated that methoxy groups on 4 and 5 caused steric hindrance which prevented alternative binding modes in the tyrosinase; the methoxy groups on the B-ring of these flavones faced the catalytic site in the enzyme. CONCLUSIONS The docking simulations nicely complemented the in vitro kinetic studies, opening the way for the development of predictive models for use in drug design.
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Affiliation(s)
| | - Suat Sari
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Burak Barut
- Department of Biochemistry, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Arzu Özel
- Department of Biochemistry, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
- Drug and Pharmaceutical Technology Application and Research Centre, Karadeniz Technical University, Trabzon, Turkey
| | | | - Didem Şöhretoğlu
- Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
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Cho K, Ryu CS, Jeong S, Kim Y. Potential adverse effect of tyrosinase inhibitors on teleosts:A review. Comp Biochem Physiol C Toxicol Pharmacol 2020; 228:108655. [PMID: 31678677 DOI: 10.1016/j.cbpc.2019.108655] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/25/2019] [Accepted: 10/29/2019] [Indexed: 01/19/2023]
Abstract
Coloration plays a crucial role in the social communication and survival of organisms. Multidisciplinary studies have been conducted to elucidate the correlation between coloration and melanin biosynthesis (referred as melanogenesis). The multi-copper enzyme tyrosinase catalyzes the first two steps of melanogenesis for coloration in teleosts. Due to the increasing demand of tyrosinase inhibitors for the production of skin whitening cosmetics, hypopigmentation pharmaceuticals, and anti-browning agents, a large number of natural and synthetic inhibitors have been developed over the past few decades. Although a number of previous studies have focused on human use and toxicity, such as the increased cytotoxic effects of ROS-generating compounds, their ecotoxicological impacts on aquatic organisms are still poorly understood. Hence, the focus of the present review is to describe the role of coloration in teleosts as well as potential ecotoxicological effects elicited by exposure to tyrosinase inhibitors. Furthermore, this review introduces our recently registered adverse outcome pathway (AOP) related to tyrosinase inhibition and population decline in teleosts.
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Affiliation(s)
- Kichul Cho
- Department of Genetic Resources Research, National Marine Biodiversity Institute of Korea, Seocheon-gun, Republic of Korea; Environmental Safety Group, Korea Institute of Science and Technology (KIST) Europe, Campus E 7.1, 66123 Saarbrücken, Germany
| | - Chang Seon Ryu
- Environmental Safety Group, Korea Institute of Science and Technology (KIST) Europe, Campus E 7.1, 66123 Saarbrücken, Germany
| | - Seongho Jeong
- Environmental Safety Group, Korea Institute of Science and Technology (KIST) Europe, Campus E 7.1, 66123 Saarbrücken, Germany
| | - Youngjun Kim
- Environmental Safety Group, Korea Institute of Science and Technology (KIST) Europe, Campus E 7.1, 66123 Saarbrücken, Germany.
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Huo L, Dong C, Wang M, Lu X, Zhang W, Yang B, Yuan Y, Qiu S, Liu H, Tan H. Biomimetic Total Syntheses of Sanctis A–B with Structure Revision. Org Lett 2020; 22:934-938. [DOI: 10.1021/acs.orglett.9b04486] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Luqiong Huo
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Chunmao Dong
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Miaomiao Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xiuxiang Lu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Wenge Zhang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Bao Yang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Yunfei Yuan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Shengxiang Qiu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Hongxin Liu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Haibo Tan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
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Zhao Y, Zhou Y, Wang M. Brosimone I, an isoprenoid-substituted flavonoid, induces cell cycle G 1 phase arrest and apoptosis through ROS-dependent endoplasmic reticulum stress in HCT116 human colon cancer cells. Food Funct 2019; 10:2729-2738. [PMID: 31038133 DOI: 10.1039/c8fo02315h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brosimone I is an isoprenoid-substituted flavonoid from Artocarpus heterophyllus. Here, we reported for the first time that brosimone I induced cell cycle G1 phase arrest and apoptosis in HCT116 human colon cancer cells. Brosimone I treatment increased the cytosolic Ca2+ level, and subsequently activated the CaMKKβ-AMPK pathway. STO-609, a CaMKKβ inhibitor, and compound C, an AMPK-specific inhibitor, attenuated brosimone I-induced loss of cell viability in HCT116 cells. Furthermore, brosimone I enhanced ER stress. Salubrinal, an ER stress inhibitor, reduced brosimone I-induced cell growth inhibition. In addition, brosimone I was found to increase ROS generation and the inhibition of ROS formation by NAC, a ROS inhibitor, attenuated brosimone I-induced cell death, cytosolic Ca2+ increase, and ER stress markers. Collectively, our findings reveal that brosimone I induces cell cycle G1 phase arrest and apoptosis via the induction of ROS-mediated increased cytosolic Ca2+, ER stress, and the activation of the CaMKKβ-AMPK signaling pathway.
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Affiliation(s)
- Yueliang Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
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21
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Son NT, Mai Thanh DT, Van Trang N. Flavone norartocarpetin and isoflavone 2′-hydroxygenistein: A spectroscopic study for structure, electronic property and antioxidant potential using DFT (Density functional theory). J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Chen Y, Chen WN, Hu N, Banwell MG, Ma C, Gardiner MG, Lan P. Cytotoxicity and Anti-inflammatory Properties of Apigenin-Derived Isolaxifolin. JOURNAL OF NATURAL PRODUCTS 2019; 82:2451-2459. [PMID: 31465218 DOI: 10.1021/acs.jnatprod.9b00113] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The rare flavonoid isolaxifolin, a potent insecticide, has been touted as a potential grain-protecting agent. In order to assess any impact of this natural product on human health and to explore its various other biological properties, we have established a semisynthesis from the simpler but structurally related and more abundant natural product apigenin. The five-step reaction sequence has provided, for the first time, sufficient material for an in-depth evaluation of the cytotoxic properties of the title natural product. The impact of isolaxifolin on certain pro-inflammatory cytokines in murine macrophage RAW 264.7 cells has also been examined. Such studies have revealed that isolaxifolin displays no toxic effects toward normal cells while displaying greater cytotoxicities against certain cancer cell lines than its synthetic precursor apigenin. Furthermore, unlike apigenin, isolaxifolin only reduced NO, TNF-α, and IL-6 secretions in LPS-induced RAW 264.7 cells in a rather modest and dose-independent manner.
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Affiliation(s)
- Yongsheng Chen
- Institute for Advanced and Applied Chemical Synthesis , Jinan University , Guangzhou , 510632 , People's Republic of China
- Department of Food Science and Engineering , Jinan University , Guangzhou , 510632 , People's Republic of China
| | - Wan-Na Chen
- College of Pharmacy , Jinan University , Guangzhou , 510632 , People's Republic of China
| | - Nan Hu
- Institute for Advanced and Applied Chemical Synthesis , Jinan University , Guangzhou , 510632 , People's Republic of China
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis , Jinan University , Guangzhou , 510632 , People's Republic of China
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Chenxi Ma
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Michael G Gardiner
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | - Ping Lan
- Institute for Advanced and Applied Chemical Synthesis , Jinan University , Guangzhou , 510632 , People's Republic of China
- College of Pharmacy , Jinan University , Guangzhou , 510632 , People's Republic of China
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Kumar TU, Roy D, Bhattacharya A. Iron(III) catalyzed direct C–H functionalization at the C-3 position of chromone for the synthesis of fused chromeno-quinoline scaffolds. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.06.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Fan M, Ding H, Zhang G, Hu X, Gong D. Relationships of dietary flavonoid structure with its tyrosinase inhibitory activity and affinity. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.02.076] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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25
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Constituents Isolated from the Leaves of Glycyrrhiza uralansis and Their Anti-Inflammatory Activities on LPS-Induced RAW264.7 Cells. Molecules 2019; 24:molecules24101923. [PMID: 31109095 PMCID: PMC6571819 DOI: 10.3390/molecules24101923] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 05/13/2019] [Accepted: 05/17/2019] [Indexed: 12/14/2022] Open
Abstract
Licorice, the root and rhizome of Glycyrrhiza uralansis Fisch, is one of the most frequently used Traditional Chinese Medicines in rigorous clinical trials to remove toxins and sputum, and to relieve coughing. However, the aerial parts are not used so widely at present. It has been reported that the aerial parts have many bioactivities such as anti-microbial and anti-HIV activities. In this study, we aimed to discover the bioactive compounds from the leaves of G. uralensis. Four new compounds, licostilbene A-B (1-2) and licofuranol A-B (3-4), together with eight known flavonoids (5-12), were isolated and identified from the leaves of G. uralensis. Their structures were elucidated mainly by the interpretation of high-resolution electrospray mass spectrometry (HR-ESI-MS) and nuclear magnetic resonance (NMR) spectroscopic data. Compared with quercetin, which showed a 50% inhibitory concentration (IC50) value of 4.08 μg/mL, compounds 1-9 showed significant anti-inflammatory activities by inhibiting lipopolysaccharide (LPS)-induced nitric oxide (NO) production with IC50 values of 2.60, 2.15, 3.21, 3.25, 2.00, 3.45, 2.53, 3.13 and 3.17 μg/mL, respectively. The discovery of these active compounds is important for the prevention and treatment of inflammation.
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Liu X, Kong WS, Li P, Li J, Ye L, Gen YQ, Jiang CQ, Li YP, Rao GX, Zhou M, Guangyu-Yang, Li XM, Hu QF. Two New Flavones from the Barks of Cassia alata and their Bioactivity. Chem Nat Compd 2018. [DOI: 10.1007/s10600-018-2553-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Identification of Anti-Melanogenesis Constituents from Morus alba L. Leaves. Molecules 2018; 23:molecules23102559. [PMID: 30297610 PMCID: PMC6222840 DOI: 10.3390/molecules23102559] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/29/2018] [Accepted: 09/30/2018] [Indexed: 12/31/2022] Open
Abstract
The individual parts of Morus alba L. including root bark, branches, leaves, and fruits are used as a cosmetic ingredient in many Asian countries. This study identified several anti-melanogenesis constituents in a 70% ethanol extract of M. alba leaves. The ethyl acetate fraction of the initial ethanol extract decreased the activity of tyrosinase, a key enzyme in the synthetic pathway of melanin. Twelve compounds were isolated from this fraction and their structures were identified based on spectroscopic spectra. Then, the authors investigated the anti-melanogenesis effects of the isolated compounds in B16-F10 mouse melanoma cells. Compounds 3 and 8 significantly inhibited not only melanin production but also intracellular tyrosinase activity in alpha-melanocyte-stimulating-hormone (α-MSH)-induced B16-F10 cells in a dose-dependent manner. These same compounds also inhibited melanogenesis-related protein expression such as microphthalmia-associated transcription factor (MITF), tyrosinase, and tyrosinase-related protein-1 (TRP-1). Compound 3 modulated the cAMP-responsive element-binding protein (CREB) and p38 signaling pathways in α-MSH-activated B16-F10 melanoma cells, which resulted in the anti-melanogenesis effects. These results suggest that compound 3, isolated from M. alba leaves, could be used to inhibit melanin production via the regulation of melanogenesis-related protein expression.
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Ephrem E, Najjar A, Charcosset C, Greige-Gerges H. Encapsulation of natural active compounds, enzymes, and probiotics for fruit juice fortification, preservation, and processing: An overview. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.06.021] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Du JY, Ma YH, Meng FX, Chen BL, Zhang SL, Li QL, Gong SW, Wang DQ, Ma CL. Lewis Acid Catalyzed Tandem 1,4-Conjugate Addition/Cyclization of in Situ Generated Alkynyl o-Quinone Methides and Electron-Rich Phenols: Synthesis of Dioxabicyclo[3.3.1]nonane Skeletons. Org Lett 2018; 20:4371-4374. [DOI: 10.1021/acs.orglett.8b01862] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ji-Yuan Du
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Yan-Hua Ma
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Fan-Xiao Meng
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Bao-Li Chen
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Shao-Liang Zhang
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Qian-Li Li
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Shu-Wen Gong
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Da-Qi Wang
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Chun-Lin Ma
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
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Septama AW, Jantan I, Panichayupakaranant P. Flavonoids of Artocarpus heterophyllus Lam. heartwood inhibit the innate immune responses of human phagocytes. J Pharm Pharmacol 2018; 70:1242-1252. [PMID: 29943393 DOI: 10.1111/jphp.12952] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 05/28/2018] [Indexed: 02/05/2023]
Abstract
Abstract
Objectives
To investigate the effects of flavonoids isolated from Artocarpus heterophyllus. heartwood on chemotaxis, phagocytosis, reactive oxygen species (ROS) production and myeloperoxidase (MPO) activity of human phagocytes.
Methods
Chemotaxis was evaluated using a modified Boyden chamber and phagocytosis was determined by flowcytometer. Respiratory burst was investigated by luminol-based chemiluminescence assay while MPO activity was determined by colorimetric assay.
Key findings
Artocarpanone and artocarpin strongly inhibited all steps of phagocytosis. Artocarpanone and artocarpin showed strong chemotactic activity with IC50 values of 6.96 and 6.10 μm, respectively, which were lower than that of ibuprofen (7.37 μm). Artocarpanone was the most potent compound in inhibiting ROS production of polymorphonuclear leucocytes and monocytes with IC50 values comparable to those of aspirin. Artocarpin at 100 μg/ml inhibited phagocytosis of opsonized bacteria (28.3%). It also strongly inhibited MPO release with an IC50 value (23.3 μm) lower than that of indomethacin (69 μm). Structure–activity analysis indicated that the number of hydroxyl group, the presence of prenyl group and variation of C-2 and C-3 bonds might contribute towards their phagocytosis.
Conclusions
Artocarpanone and artocarpin were able to suppress strongly the phagocytosis of human phagocytes at different steps and have potential to be developed into potent anti-inflammatory agents.
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Affiliation(s)
| | - Ibrahim Jantan
- Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Pharkphoom Panichayupakaranant
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla, Thailand
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Ren FC, Jiang XJ, Wen SZ, Wang LX, Li XM, Wang F. Prenylated 2-Phenoxychromones and Flavonoids from Epimedium brevicornum and Revised Structures of Epimedonins A and B. JOURNAL OF NATURAL PRODUCTS 2018; 81:16-21. [PMID: 29338226 DOI: 10.1021/acs.jnatprod.7b00514] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Six hitherto unknown prenylated 2-phenoxychromones, epimedonin G (1), 7-O-methylepimedonin G (2), and epimedonins H-K (3-6), and two new prenylflavonoids, epimedonin L (7) and 3″-O-desmethylspinorhamnoside (8), were isolated from an ethanol extract of the aerial parts of Epimedium brevicornum. Their structures were established on the basis of spectroscopic data interpretation. Compound 7 exhibited cytotoxic activity when evaluated against four human cancer cell lines (HL-60, A-549, MCF-7, and SW-480), with IC50 values of <10 μM. In addition, the structures of epimedonins A and B (9a, 10a), recently isolated from E. koreanum, were corrected by reanalysis of the published NMR data.
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Affiliation(s)
- Fu-Cai Ren
- BioBioPha Co., Ltd. , 132 Lanhei Road, Kunming 650201, People's Republic of China
| | - Xian-Jun Jiang
- BioBioPha Co., Ltd. , 132 Lanhei Road, Kunming 650201, People's Republic of China
| | - Shi-Zhen Wen
- BioBioPha Co., Ltd. , 132 Lanhei Road, Kunming 650201, People's Republic of China
| | - Li-Xia Wang
- BioBioPha Co., Ltd. , 132 Lanhei Road, Kunming 650201, People's Republic of China
| | - Xiang-Mei Li
- BioBioPha Co., Ltd. , 132 Lanhei Road, Kunming 650201, People's Republic of China
| | - Fei Wang
- BioBioPha Co., Ltd. , 132 Lanhei Road, Kunming 650201, People's Republic of China
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Antitumoral, antioxidant, and antimelanogenesis potencies of Hawthorn, a potential natural agent in the treatment of melanoma. Melanoma Res 2018; 26:211-22. [PMID: 26795272 DOI: 10.1097/cmr.0000000000000240] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The lack of an efficient agent that does not have the disadvantage of low activity (kojic acid), high cytotoxicity, and mutagenicity (hydroquinone), poor skin penetration (arbutin), or low stability in formulation (glabridin) led us to continue our research on new antipigmentation/skin-lightening agents. Therefore, research of natural products that can modulate the metabolism of pigmentation is of great interest. Otherwise, malignant melanoma is one of the most aggressive forms of skin cancer, with high metastatic potential, and currently, there is no effective chemotherapy against invasive melanoma. Therefore, it is necessary to develop new drugs with potent activity and weak side effects against melanoma. The in-vitro anticancer effect of hawthorn was analyzed against B16F10 melanoma cells using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. The effect of isolated compounds from hawthorn on melanogenesis in B16F10 melanoma cells was investigated by measuring the amounts of melanin and tyrosinase spectrophotometrically at 475 nm. Balb/c mice models inoculated with B16F10 mouse tumor cells were used to evaluate the in-vivo antitumoral potential of hawthorn by assessing its effect on the growth of transplanted tumors. The antioxidant potential of tested samples was evaluated in B16F10 and primary human keratinocyte cells using a cellular antioxidant activity assay. Hawthorn tested samples inhibited effectively the growth of melanoma cells in vitro. Furthermore, it appears that tested samples from hawthorn reduced melanogenesis by inhibiting the tyrosinase activity of B16F10 cells in a dose-dependent manner. In-vivo studies showed that hawthorn total oligomer flavonoids extract treatment at a dose of 150 mg/kg body weight for 21 days in implanted tumor mice resulted in significant inhibition of the tumor growth volume and weight. In addition, tested samples showed significant cellular antioxidant capacity against the reactive oxygen species in B16F10 and primary human keratinocyte cells. Our results indicate that hawthorn could be considered as a promising agent for the treatment of melanoma as it shows antitumor activity in vitro and in vivo. Moreover, hawthorn constituents are shown to be highly effective at inhibiting tyrosinase-mediated melanogenesis in vitro on melanoma cells by preventing oxidation in these cells and without affecting the viability of normal human keratinocyte cells. Then, hawthorn might also be used as a new candidate of natural skin depigmenting agents in skin care products.
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Zhou SY, Wang R, Deng LQ, Zhang XL, Chen M. A new isoflavanone from Ficus tikoua Bur. Nat Prod Res 2018; 32:2516-2522. [DOI: 10.1080/14786419.2017.1423307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Si-Yu Zhou
- College of Pharmaceutical Sciences, Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Southwest University, Chongqing, P.R. China
| | - Rui Wang
- College of Pharmaceutical Sciences, Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Southwest University, Chongqing, P.R. China
| | - Li-Qing Deng
- College of Pharmaceutical Sciences, Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Southwest University, Chongqing, P.R. China
| | - Xiao-Long Zhang
- College of Pharmaceutical Sciences, Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Southwest University, Chongqing, P.R. China
| | - Min Chen
- College of Pharmaceutical Sciences, Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Southwest University, Chongqing, P.R. China
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Tang H, Cui F, Li H, Huang Q, Li Y. Understanding the inhibitory mechanism of tea polyphenols against tyrosinase using fluorescence spectroscopy, cyclic voltammetry, oximetry, and molecular simulations. RSC Adv 2018; 8:8310-8318. [PMID: 35542029 PMCID: PMC9078569 DOI: 10.1039/c7ra12749a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 02/15/2018] [Indexed: 11/21/2022] Open
Abstract
Inhibiting the activity of tyrosinase is a very effective and safe way to prevent enzymatic browning in food and to resist pests in agriculture. Tea polyphenols (TPs), regarded as safe and non-toxic food additives, have been reported due to their potential inhibitory capability against tyrosinase, but their ambiguous inhibitory mechanisms have severely limited their application. In the present work, fluorescence spectroscopy, cyclic voltammetry (CV), oximetry and molecular simulation approaches were employed to shed light on the underlying inhibitory mechanisms of TPs with different structures including (+)-catechin, (−)-epicatechin gallate (ECG) and (−)-epigallocatechin gallate (EGCG) against tyrosinase. Fluorescence spectra show that the three TPs are capable of binding tyrosinase with a molar proportion of 1 : 1. The analysis of CV curves and oxygen utilization suggests that these three TPs can be oxidized by tyrosinase, revealing that these three TPs are suicide inhibitors of tyrosinase. Furthermore, ECG and catechin make tyrosinase irreversibly inactivated due to their catechol group (ring B) being catalyzed by tyrosinase through a cresolase-like pathway, while EGCG inhibits the activity of tyrosinase by competing with or delaying the oxidation of substrate. Molecular simulations further confirm that ring B of ECG and catechin makes a significant contribution to tyrosinase inhibitory activities, and has a direct interaction with the coupled binuclear copper ions in the optimal orientation required by the cresolase-like pathway. Revealing the inactivation mechanism of TPs on inhibiting the activity of tyrosinase.![]()
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Affiliation(s)
- Haifeng Tang
- Key Laboratory of Synthetic Rubber
- Changchun Institute of Applied Chemistry (CIAC)
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Fengchao Cui
- Key Laboratory of Synthetic Rubber
- Changchun Institute of Applied Chemistry (CIAC)
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Haijuan Li
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry (CIAC)
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Qingrong Huang
- Department of Food Science
- Rutgers University
- New Brunswick
- USA
| | - Yunqi Li
- Key Laboratory of Synthetic Rubber
- Changchun Institute of Applied Chemistry (CIAC)
- Chinese Academy of Sciences
- Changchun
- P. R. China
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Nguyen MTT, Le TH, Nguyen HX, Dang PH, Do TNV, Abe M, Takagi R, Nguyen NT. Artocarmins G-M, Prenylated 4-Chromenones from the Stems of Artocarpus rigida and Their Tyrosinase Inhibitory Activities. JOURNAL OF NATURAL PRODUCTS 2017; 80:3172-3178. [PMID: 29227656 DOI: 10.1021/acs.jnatprod.7b00453] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Phytochemical analysis of an EtOAc extract of the stems of Artocarpus rigida led to the identification of seven new prenylated 4-chromenones, artocarmins G-M (1-7), and nine known compounds (8-17). Their structures were identified based on physical data analysis. In the tyrosinase inhibitory activity test, norartocarpetin (8) displayed the strongest effect, with an IC50 value of 0.023 μM.
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Affiliation(s)
| | | | | | | | | | - Manabu Abe
- Department of Chemistry, Graduate School of Science, Hiroshima University , Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ryukichi Takagi
- Department of Chemistry, Graduate School of Science, Hiroshima University , Higashi-Hiroshima, Hiroshima 739-8526, Japan
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Bakthadoss M, Kumar PV, Reddy TS. Ruthenium-Catalyzed, Keto-Directed, Site-Selective C-H Activation of Diverse Chromanones with Alkenes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700513] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Polu Vijay Kumar
- Department of Chemistry; Pondicherry University; 605014 Puducherry India
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Preparation of steppogenin and ascorbic acid, vitamin E, butylated hydroxytoluene oil-in-water microemulsions: Characterization, stability, and antibrowning effects for fresh apple juice. Food Chem 2017; 224:11-18. [DOI: 10.1016/j.foodchem.2016.12.045] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 12/11/2016] [Accepted: 12/14/2016] [Indexed: 11/22/2022]
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Boonyaketgoson S, Rukachaisirikul V, Phongpaichit S, Trisuwan K. Cytotoxic arylbenzofuran and stilbene derivatives from the twigs of Artocarpus heterophyllus. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Wang XL, Di XX, Shen T, Wang SQ, Wang XN. New phenolic compounds from the leaves of Artocarpus heterophyllus. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2016.06.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Park S, Fudhaili A, Oh SS, Lee KW, Madhi H, Kim DH, Yoo J, Ryu HW, Park KH, Kim KD. Cytotoxic effects of kazinol A derived from Broussonetia papyrifera on human bladder cancer cells, T24 and T24R2. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:1462-1468. [PMID: 27765366 DOI: 10.1016/j.phymed.2016.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 07/21/2016] [Accepted: 08/20/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Broussonetia papyrifera (B. papyrifera), also known as paper mulberry, has been used as a traditional medicine for the treatment of several diseases, including ophthalmic disorders and impotency. However, the biological activity of kazinol A (1) among flavonols isolated from B. papyrifera has not been identified. PURPOSE We identified a candidate metabolite for anti-human bladder cancer treatment from B. papyrifera and investigated the possible molecular mechanisms underlying its cytotoxic effects in T24 and cisplatin-resistant T24R2 human bladder cancer cells. METHODS T24 and T24R2 cells were treated with five flavonols from B. papyrifera and their cytotoxic effects were determined using MTT assay, cell cycle analysis, mitochondrial membrane potential, and propidium iodide staining. Autophagy rate was calculated by counting LC3-GFP dots in the cells. All related protein expressions were analyzed by immunoblotting. RESULTS Compound 1 showed relatively higher cytotoxicity in the human bladder cancer cells, T24 and T24R2, rather than other tissues-originated cancer cells. Compound 1 significantly attenuated cell growth through G0/1 arrest mediated by a decrease in cyclin D1 and an increase of p21. Apoptosis and autophagy induced by compound 1 treatment was accompanied by a modulation of the AKT-BAD pathway and AMPK-mTOR pathway, respectively. CONCLUSIONS Our results suggest that compound 1 induces cytotoxic effects in human bladder cancer cells, including the cisplatin-resistant T24R2. Compound 1 may be a candidate for the development of effective anti-cancer drug on human urinary bladder cancer.
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Affiliation(s)
- Soojong Park
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Ahmad Fudhaili
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Sang-Seok Oh
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Ki Won Lee
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Hamadi Madhi
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Dong-Hee Kim
- Department of Orthopaedic Surgery, School of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Jiyun Yoo
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Hyung Won Ryu
- Natural Medicine Research Center, KRIBB, 30-Yeongudanji-ro, Ochang-eup, Cheongwon 363-883, Republic of Korea
| | - Ki-Hun Park
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea
| | - Kwang Dong Kim
- Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju, Republic of Korea; PMBBRC, Gyeongsang National University, Jinju, Republic of Korea.
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Characterization of a New Flavone and Tyrosinase Inhibition Constituents from the Twigs of Morus alba L. Molecules 2016; 21:molecules21091130. [PMID: 27598113 PMCID: PMC6274457 DOI: 10.3390/molecules21091130] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 08/24/2016] [Accepted: 08/24/2016] [Indexed: 11/17/2022] Open
Abstract
The twigs of Morus alba L. were found to show strong tyrosinase inhibition activity, and the responsible active components in the extract were further investigated in this study. A flavone, named morusone (1), and sixteen known compounds 2–17 were isolated from M. alba twigs and their structures were identified by interpretation of the corresponding ESI-MS and NMR spectral data. In the tyrosinase inhibitory test, the compounds steppogenin (IC50 0.98 ± 0.01 µM), 2,4,2′,4′-tetrahydroxychalcone (IC50 0.07 ± 0.02 µM), morachalcone A (IC50 0.08 ± 0.02 µM), oxyresveratrol (IC50 0.10 ± 0.01 µM), and moracin M (8.00 ± 0.22 µM) exhibited significant tyrosinase inhibition activities, much stronger than that of the positive control kojic acid. These results suggest that M. alba twig extract should served as a good source of natural tyrosinase inhibitors for use in foods as antibrowning agents or in cosmetics as skin-whitening agents.
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Namjoyan F, Jahangiri A, Azemi ME, Mousavi H. Inhibitory Effects of Urginea maritima (L.) Baker, Zhumeria majdae Rech. F. and Wendelbo and Physalis divaricata D. Don Ethanolic Extracts on Mushroom Tyrosinase. PHARMACEUTICAL SCIENCES 2016. [DOI: 10.15171/ps.2016.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Shi ZF, Lei C, Yu BW, Wang HY, Hou AJ. New Alkaloids andα-Glucosidase Inhibitory Flavonoids fromFicus hispida. Chem Biodivers 2016; 13:445-50. [DOI: 10.1002/cbdv.201500142] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 11/30/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Zheng-Feng Shi
- Department of Pharmacognosy; School of Pharmacy; Fudan University; 826 Zhang Heng Road Shanghai 201203 P. R. China
| | - Chun Lei
- Department of Pharmacognosy; School of Pharmacy; Fudan University; 826 Zhang Heng Road Shanghai 201203 P. R. China
| | - Bang-Wei Yu
- Shanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 P. R. China
| | - He-Yao Wang
- Shanghai Institute of Materia Medica; Chinese Academy of Sciences; 555 Zu Chong Zhi Road Shanghai 201203 P. R. China
| | - Ai-Jun Hou
- Department of Pharmacognosy; School of Pharmacy; Fudan University; 826 Zhang Heng Road Shanghai 201203 P. R. China
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Encapsulation artocarpanone and ascorbic acid in O/W microemulsions: Preparation, characterization, and antibrowning effects in apple juice. Food Chem 2016; 192:1033-40. [DOI: 10.1016/j.foodchem.2015.07.124] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Revised: 07/24/2015] [Accepted: 07/25/2015] [Indexed: 11/23/2022]
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Zheng ZP, Zhang YN, Zhang S, Chen J. One-pot green synthesis of 1,3,5-triarylpentane-1,5-dione and triarylmethane derivatives as a new class of tyrosinase inhibitors. Bioorg Med Chem Lett 2016; 26:795-798. [DOI: 10.1016/j.bmcl.2015.12.092] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 12/17/2015] [Accepted: 12/25/2015] [Indexed: 12/24/2022]
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Nguyen HX, Nguyen NT, Nguyen MHK, Le TH, Van Do TN, Hung TM, Nguyen MTT. Tyrosinase inhibitory activity of flavonoids from Artocarpus heterophyllous. Chem Cent J 2016; 10:2. [PMID: 26834825 PMCID: PMC4734850 DOI: 10.1186/s13065-016-0150-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 01/10/2016] [Indexed: 12/28/2022] Open
Abstract
Background
Tyrosinase is an oxidoreductase that is very important in medicine and cosmetics because the excessive production of melanin causes hyperpigmentation. The development of novel, effective tyrosinase inhibitors has long been pursued. In preliminary tests, we found that an extract of the wood of Artocarpus heterophyllous (AH) potently inhibited tyrosinase activity. Results Two new flavonoids, artocaepin E (1) and artocaepin F (2), were isolated from the wood of AH, together with norartocarpetin (3), artocarpanone (4), liquiritigenin (5), steppogenin (6), and dihydromorin (7). Their structures were elucidated using one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR) and mass spectrometry. The absolute configuration of 2 was determined from the circular dichroism (CD) spectrum. Artocarpanone (4) had the most potent tyrosinase inhibitory effect, with an IC50 of 2.0 ± 0.1 μM, followed by artocaepin E (1) and steppogenin (6), with IC50 values of 6.7 ± 0.8 and 7.5 ± 0.5 μM, respectively. A kinetic investigation indicated that 1 showed competitive inhibition, with an inhibition constant (Ki) of 6.23 μM. Conclusions These results demonstrate that extracts of the wood of AH and its phytochemical constituents are potential sources for skin-whitening agents.Artocarmin E (1) and artocarmin F (2) were isolated from the wood of Artocarpus heterophyllous. Their structures were elucidated using nuclear magnetic resonance analysis and mass spectrometric methods ![]() Electronic supplementary material The online version of this article (doi:10.1186/s13065-016-0150-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam ; Cancer Research Laboratory, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Mai Ha Khoa Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Tran Manh Hung
- Department of Biomedical Sciences, Institute for Research and Executive Education (VNUK), The University of Danang, 41 Le Duan, Haichau District, Danang, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam ; Cancer Research Laboratory, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
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Preparation of tyrosinase inhibitors and antibrowning agents using green technology. Food Chem 2015; 197:589-96. [PMID: 26616992 DOI: 10.1016/j.foodchem.2015.11.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 10/28/2015] [Accepted: 11/02/2015] [Indexed: 01/10/2023]
Abstract
Chalcones and their derivatives have attracted great interests in recent years for their comprehensive biological activities. In this study, 2,4,2',4'-tetrahydroxychalcone and its two derivatives, 1,3,5-tris-(2,4-dihydroxy-phenyl)pentane-1,5-dione (new compound) and 7,2',4'-trihydroxyflavanone, were synthesized through one-pot green procedure catalyzed by boric acid in polyethylene glycol 400. Their structures were identified by ESI-MS and NMR spectral. Tyrosinase inhibitory activity and antibrowning test results showed that compounds 1-3 exhibited strong tyrosinase inhibitory activities and significant antibrowning effects on the fresh-cut lotus root slices at room temperature in 48 h. Among them, 0.01% 1,3,5-tris-(2,4-dihydroxy-phenyl)pentane-1,5-dione combined with 0.5% VC showed the best antibrowning ability. In brief, this study offers a protocol for one-pot green synthesis of high efficiency tyrosinase inhibitors which may be suitable as antibrowning agents for fresh-cut vegetables. More important, this study developed a new type of 1,5-dione derivative which may serve as new lead structures for novel tyrosinase inhibitors discovery.
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Jin YJ, Lin CC, Lu TM, Li JH, Chen IS, Kuo YH, Ko HH. Chemical constituents derived from Artocarpus xanthocarpus as inhibitors of melanin biosynthesis. PHYTOCHEMISTRY 2015; 117:424-435. [PMID: 26188915 DOI: 10.1016/j.phytochem.2015.07.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 07/05/2015] [Accepted: 07/09/2015] [Indexed: 06/04/2023]
Abstract
Twenty-four compounds, including the previously unknown artoxanthocarpuone A, artoxanthocarpuone B, hydroxylakoochin A, methoxylakoochin A, epoxylakoochin A, and artoxanthol, were isolated and characterized spectroscopically. Among them, artoxanthol is stilbene oligomer presumably constructed in a 5,11,12-triphenyl hexahydrochrysene scaffold by a Diels-Alder type of reaction, for which a biosynthetic pathway is proposed. Artoxanthol, alboctalol, steppogenin, norartocarpetin, resveratrol, oxyresveratrol, and chlorophorin potently inhibited mushroom tyrosinase activity with IC50 values from 0.9 to 5.7 μM that were all far stronger than the positive controls. Artoxanthocarpuone A, artoxanthocarpuone B, methoxylakoochin A, lakoochin A, cudraflavone C, artonin A, resveratrol, and chlorophorin reduced tyrosinase activity and inhibited α-melanocyte-stimulating hormone-induced melanin production in B16F10 melanoma cells without affecting cell proliferation. Collectively, the results suggest that the constituents of Artocarpus xanthocarpus have potential to be used as depigmentation agents.
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Affiliation(s)
- Yu-Jing Jin
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Cha-Chi Lin
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Tzy-Ming Lu
- Department of Pharmacy, Tajen University, Pingtung County 907, Taiwan
| | - Jih-Heng Li
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Ih-Sheng Chen
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Research Center for Natural Products and Drug Development, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 404, Taiwan; Department of Biotechnology, Asia University, Taichung 413, Taiwan
| | - Horng-Huey Ko
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Research Center for Natural Products and Drug Development, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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Sung HM, Jung HJ, Sin JS, Kim KM, Wee JH. Skin whitening activity of supercritical fluid extract from spent coffee in B16F10 melanoma cell. Food Sci Biotechnol 2015. [DOI: 10.1007/s10068-015-0139-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Pancreatic lipase inhibitory constituents from Morus alba leaves and optimization for extraction conditions. Bioorg Med Chem Lett 2015; 25:2269-74. [DOI: 10.1016/j.bmcl.2015.04.045] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 04/10/2015] [Accepted: 04/18/2015] [Indexed: 01/09/2023]
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