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Sanati M, Afshari AR, Ahmadi SS, Moallem SA, Sahebkar A. Modulation of the ubiquitin-proteasome system by phytochemicals: Therapeutic implications in malignancies with an emphasis on brain tumors. Biofactors 2023; 49:782-819. [PMID: 37162294 DOI: 10.1002/biof.1958] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 04/20/2023] [Indexed: 05/11/2023]
Abstract
Regarding the multimechanistic nature of cancers, current chemo- or radiotherapies often fail to eradicate disease pathology, and frequent relapses or resistance to therapies occur. Brain malignancies, particularly glioblastomas, are difficult-to-treat cancers due to their highly malignant and multidimensional biology. Unfortunately, patients suffering from malignant tumors often experience poor prognoses and short survival periods. Thus far, significant efforts have been conducted to discover novel and more effective modalities. To that end, modulation of the ubiquitin-proteasome system (UPS) has attracted tremendous interest since it affects the homeostasis of proteins critically engaged in various cell functions, for example, cell metabolism, survival, proliferation, and differentiation. With their safe and multimodal actions, phytochemicals are among the promising therapeutic tools capable of turning the operation of various UPS elements. The present review, along with an updated outline of the role of UPS dysregulation in multiple cancers, provided a detailed discussion on the impact of phytochemicals on the UPS function in malignancies, especially brain tumors.
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Affiliation(s)
- Mehdi Sanati
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Birjand University of Medical Sciences, Birjand, Iran
- Experimental and Animal Study Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Amir R Afshari
- Natural Products and Medicinal Plants Research Center, North Khorasan University of Medical Sciences, Bojnurd, Iran
- Department of Physiology and Pharmacology, Faculty of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Seyed Sajad Ahmadi
- Department of Ophthalmology, Khatam-Ol-Anbia Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Adel Moallem
- Department of Pharmacology and Toxicology, College of Pharmacy, Al-Zahraa University for Women, Karbala, Iraq
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhossein Sahebkar
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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2
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Parish M, Massoud G, Hazimeh D, Segars J, Islam MS. Green Tea in Reproductive Cancers: Could Treatment Be as Simple? Cancers (Basel) 2023; 15:cancers15030862. [PMID: 36765820 PMCID: PMC9913717 DOI: 10.3390/cancers15030862] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/24/2023] [Accepted: 01/28/2023] [Indexed: 01/31/2023] Open
Abstract
Green tea originates from the tea plant Camellia sinensis and is one of the most widely consumed beverages worldwide. Green tea polyphenols, commonly known as catechins, are the major bioactive ingredients and account for green tea's unique health benefits. Epigallocatechin-3-gallate (EGCG), is the most potent catechin derivative and has been widely studied for its pro- and anti-oxidative effects. This review summarizes the chemical and chemopreventive properties of green tea in the context of female reproductive cancers. A comprehensive search of PubMed and Google Scholar up to December 2022 was conducted. All original and review articles related to green tea or EGCG, and gynecological cancers published in English were included. The findings of several in vitro, in vivo, and epidemiological studies examining the effect of green tea on reproductive cancers, including ovarian, cervical, endometrial, and vulvar cancers, are presented. Studies have shown that this compound targets specific receptors and intracellular signaling pathways involved in cancer pathogenesis. The potential benefits of using green tea in the treatment of reproductive cancers, alone or in conjunction with chemotherapeutic agents, are examined, shedding light on new therapeutic strategies for the management of female reproductive cancers.
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Affiliation(s)
| | | | | | - James Segars
- Correspondence: (J.S.); or (M.S.I.); Tel.: +1-410-614-2000 (J.S. & M.S.I.)
| | - Md Soriful Islam
- Correspondence: (J.S.); or (M.S.I.); Tel.: +1-410-614-2000 (J.S. & M.S.I.)
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3
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Jeong GH, Kim TH. Plasma-Induced Oxidation Products of (-)-Epigallocatechin Gallate with Digestive Enzymes Inhibitory Effects. Molecules 2021; 26:5799. [PMID: 34641343 PMCID: PMC8510274 DOI: 10.3390/molecules26195799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/15/2021] [Accepted: 09/23/2021] [Indexed: 11/18/2022] Open
Abstract
(-)-Epigallocatechin gallate (EGCG), the chief dietary constituent in green tea (Camellia sinensis), is relatively unstable under oxidative conditions. This study evaluated the use of non-thermal dielectric barrier discharge (DBD) plasma to improve the anti-digestive enzyme capacities of EGCG oxidation products. Pure EGCG was dissolved in an aqueous solution and irradiated with DBD plasma for 20, 40, and 60 min. The reactant, irradiated for 60 min, exhibited improved inhibitory properties against α-glucosidase and α-amylase compared with the parent EGCG. The chemical structures of these oxidation products 1-3 from the EGCG, irradiated with the plasma for 60 min, were characterized using spectroscopic methods. Among the oxidation products, EGCG quinone dimer A (1) showed the most potent inhibitory effects toward α-glucosidase and α-amylase with IC50 values of 15.9 ± 0.3 and 18.7 ± 0.3 μM, respectively. These values were significantly higher than that of the positive control, acarbose. Compound 1, which was the most active, was the most abundant in the plasma-irradiated reactant for 60 min according to quantitative high-performance liquid chromatography analysis. These results suggest that the increased biological capacity of EGCG can be attributed to the structural changes to EGCG in H2O, induced by cold plasma irradiation.
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Affiliation(s)
| | - Tae Hoon Kim
- Department of Food Science and Biotechnology, Daegu University, Gyeongsan 38453, Korea;
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4
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Cecarini V, Cuccioloni M, Zheng Y, Bonfili L, Gong C, Angeletti M, Mena P, Del Rio D, Eleuteri AM. Flavan-3-ol Microbial Metabolites Modulate Proteolysis in Neuronal Cells Reducing Amyloid-beta (1-42) Levels. Mol Nutr Food Res 2021; 65:e2100380. [PMID: 34318994 PMCID: PMC9285603 DOI: 10.1002/mnfr.202100380] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/01/2021] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Alzheimer's disease (AD) is a progressive neurodegeneration characterized by extensive protein aggregation and deposition in the brain, associated with defective proteasomal and autophagic-lysosomal proteolytic pathways. Since current drugs can only reduce specific symptoms, the identification of novel treatments is a major concern in AD research. Among natural compounds, (poly)phenols and their derivatives/metabolites are emerging as candidates in AD prevention due to their multiple beneficial effects. This study aims to investigate the ability of a selection of phenyl-γ-valerolactones, gut microbiota-derived metabolites of flavan-3-ols, to modulate the functionality of cellular proteolytic pathways. METHODS AND RESULTS Neuronal SH-SY5Y cells transfected with either the wild-type or the 717 valine-to-glycine amyloid precursor protein mutated gene are used as an AD model and treated with 5-(4'-hydroxyphenyl)-γ-valerolactone, 5-(3',4'-dihydroxyphenyl)-γ-valerolactone and 5-(3'-hydroxyphenyl)-γ-valerolactone-4'-sulfate. Combining in vitro and in silico studies, it is observed that the phenyl-γ-valerolactones of interest modulated cellular proteolysis via proteasome inhibition and consequent autophagy upregulation and inhibited cathepsin B activity, eventually reducing the amount of intra- and extracellular amyloid-beta (1-42) peptides. CONCLUSION The findings of this study establish, for the first time, that these metabolites exert a neuroprotective activity by regulating intracellular proteolysis and confirm the role of autophagy and cathepsin B as possible targets of AD preventive/therapeutic strategies.
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Affiliation(s)
- Valentina Cecarini
- School of Biosciences and Veterinary MedicineUniversity of CamerinoCamerinoItaly
| | | | - Yadong Zheng
- School of Biosciences and Veterinary MedicineUniversity of CamerinoCamerinoItaly
| | - Laura Bonfili
- School of Biosciences and Veterinary MedicineUniversity of CamerinoCamerinoItaly
| | - Chunmei Gong
- School of Biosciences and Veterinary MedicineUniversity of CamerinoCamerinoItaly
| | - Mauro Angeletti
- School of Biosciences and Veterinary MedicineUniversity of CamerinoCamerinoItaly
| | - Pedro Mena
- Human Nutrition UnitDepartment of Food and DrugsUniversity of ParmaParmaItaly
- Microbiome Research HubUniversity of ParmaParmaItaly
| | - Daniele Del Rio
- Human Nutrition UnitDepartment of Food and DrugsUniversity of ParmaParmaItaly
- Microbiome Research HubUniversity of ParmaParmaItaly
| | - Anna Maria Eleuteri
- School of Biosciences and Veterinary MedicineUniversity of CamerinoCamerinoItaly
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5
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García-Viñuales S, Sciacca MFM, Lanza V, Santoro AM, Grasso G, Tundo GR, Sbardella D, Coletta M, Grasso G, La Rosa C, Milardi D. The interplay between lipid and Aβ amyloid homeostasis in Alzheimer's Disease: risk factors and therapeutic opportunities. Chem Phys Lipids 2021; 236:105072. [PMID: 33675779 DOI: 10.1016/j.chemphyslip.2021.105072] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/15/2021] [Accepted: 03/01/2021] [Indexed: 12/19/2022]
Abstract
Alzheimer's Diseases (AD) is characterized by the accumulation of amyloid deposits of Aβ peptide in the brain. Besides genetic background, the presence of other diseases and an unhealthy lifestyle are known risk factors for AD development. Albeit accumulating clinical evidence suggests that an impaired lipid metabolism is related to Aβ deposition, mechanistic insights on the link between amyloid fibril formation/clearance and aberrant lipid interactions are still unavailable. Recently, many studies have described the key role played by membrane bound Aβ assemblies in neurotoxicity. Moreover, it has been suggested that a derangement of the ubiquitin proteasome pathway and autophagy is significantly correlated with toxic Aβ aggregation and dysregulation of lipid levels. Thus, studies focusing on the role played by lipids in Aβ aggregation and proteostasis could represent a promising area of investigation for the design of valuable treatments. In this review we examine current knowledge concerning the effects of lipids in Aβ aggregation and degradation processes, focusing on the therapeutic opportunities that a comprehensive understanding of all biophysical, biochemical, and biological processes involved may disclose.
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Affiliation(s)
| | - Michele F M Sciacca
- Consiglio Nazionale delle Ricerche, Istituto di Cristallografia, Catania, Italy
| | - Valeria Lanza
- Consiglio Nazionale delle Ricerche, Istituto di Cristallografia, Catania, Italy
| | - Anna Maria Santoro
- Consiglio Nazionale delle Ricerche, Istituto di Cristallografia, Catania, Italy
| | - Giulia Grasso
- Consiglio Nazionale delle Ricerche, Istituto di Cristallografia, Catania, Italy
| | - Grazia R Tundo
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | | | - Massimiliano Coletta
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Giuseppe Grasso
- Department of Chemistry, University of Catania, Catania, Italy
| | - Carmelo La Rosa
- Department of Chemistry, University of Catania, Catania, Italy
| | - Danilo Milardi
- Consiglio Nazionale delle Ricerche, Istituto di Cristallografia, Catania, Italy.
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Milardi D, Gazit E, Radford SE, Xu Y, Gallardo RU, Caflisch A, Westermark GT, Westermark P, Rosa CL, Ramamoorthy A. Proteostasis of Islet Amyloid Polypeptide: A Molecular Perspective of Risk Factors and Protective Strategies for Type II Diabetes. Chem Rev 2021; 121:1845-1893. [PMID: 33427465 DOI: 10.1021/acs.chemrev.0c00981] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The possible link between hIAPP accumulation and β-cell death in diabetic patients has inspired numerous studies focusing on amyloid structures and aggregation pathways of this hormone. Recent studies have reported on the importance of early oligomeric intermediates, the many roles of their interactions with lipid membrane, pH, insulin, and zinc on the mechanism of aggregation of hIAPP. The challenges posed by the transient nature of amyloid oligomers, their structural heterogeneity, and the complex nature of their interaction with lipid membranes have resulted in the development of a wide range of biophysical and chemical approaches to characterize the aggregation process. While the cellular processes and factors activating hIAPP-mediated cytotoxicity are still not clear, it has recently been suggested that its impaired turnover and cellular processing by proteasome and autophagy may contribute significantly toward toxic hIAPP accumulation and, eventually, β-cell death. Therefore, studies focusing on the restoration of hIAPP proteostasis may represent a promising arena for the design of effective therapies. In this review we discuss the current knowledge of the structures and pathology associated with hIAPP self-assembly and point out the opportunities for therapy that a detailed biochemical, biophysical, and cellular understanding of its aggregation may unveil.
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Affiliation(s)
- Danilo Milardi
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via P. Gaifami 18, 95126 Catania, Italy
| | - Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Yong Xu
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Rodrigo U Gallardo
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Amedeo Caflisch
- Department of Biochemistry, University of Zürich, Zürich CH-8057, Switzerland
| | - Gunilla T Westermark
- Department of Medical Cell Biology, Uppsala University, SE-751 23 Uppsala, Sweden
| | - Per Westermark
- Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden
| | - Carmelo La Rosa
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Ayyalusamy Ramamoorthy
- Biophysics, Department of Chemistry, Biomedical Engineering, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 41809-1055, United States
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7
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Wang YQ, Lu JL, Liang YR, Li QS. Suppressive Effects of EGCG on Cervical Cancer. Molecules 2018; 23:E2334. [PMID: 30213130 PMCID: PMC6225117 DOI: 10.3390/molecules23092334] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 09/05/2018] [Accepted: 09/11/2018] [Indexed: 02/07/2023] Open
Abstract
Cervical cancer is the fourth most common gynecological cancer worldwide. Although prophylactic vaccination presents the most effective method for cervical cancer prevention, chemotherapy is still the primary invasive intervention. It is urgent to exploit low-toxic natural anticancer drugs on account of high cytotoxicity and side-effects of conventional agents. As a natural product, (-)-epigallocatechingallate (EGCG) has abilities in anti-proliferation, anti-metastasis and pro-apoptosis of cervical cancer cells. Moreover, EGCG also has pharmaceutical synergistic effects with conventional agents such as cisplatin (CDDP) and bleomycin (BLM). The underlying mechanisms of EGCG suppressive effects on cervical cancer are reviewed in this article. Further research directions and ambiguous results are also discussed.
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Affiliation(s)
- Ying-Qi Wang
- Tea Research Institute, Zhejiang University, # 866 Yuhangtang Road, Hangzhou 310058, China.
| | - Jian-Liang Lu
- Tea Research Institute, Zhejiang University, # 866 Yuhangtang Road, Hangzhou 310058, China.
| | - Yue-Rong Liang
- Tea Research Institute, Zhejiang University, # 866 Yuhangtang Road, Hangzhou 310058, China.
| | - Qing-Sheng Li
- Tea Research Institute, Zhejiang University, # 866 Yuhangtang Road, Hangzhou 310058, China.
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8
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An TT, Feng S, Zeng CM. Oxidized epigallocatechin gallate inhibited lysozyme fibrillation more strongly than the native form. Redox Biol 2016; 11:315-321. [PMID: 28038426 PMCID: PMC5199191 DOI: 10.1016/j.redox.2016.12.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/08/2016] [Accepted: 12/16/2016] [Indexed: 12/13/2022] Open
Abstract
Epigallocatechin gallate (EGCG), the most abundant flavanoid in green tea, is currently being evaluated in the clinic due to its benefits in the treatment of amyloid disorders. Its anti-amyloidogenic effect has been attributed to direct interaction of the intact molecule with misfolded polypeptides. In addition, antioxidant activity is also involved in the anti-amyloidogenic role. The detailed molecular mechanism is still unclear and requires further investigation. In the present study, the kinetics of EGCG oxidation and the anti-amyloidogenic effect of the resultant oxidation substances have been examined. The results indicate that EGCG degrades in a medium at pH 8.0 with a half-life less than 2 h. By utilizing lysozyme as an in vitro model, the oxidized EGCG demonstrates a more potent anti-amyloidogenic capacity than the intact molecule, as shown by ThT and ANS fluorescence, TEM determination, and hemolytic assay. The oxidized EGCG also has a stronger disruptive effect on preformed fibrils than the native form. Ascorbic acid eliminates the disruptive role of native EGCG on the fibrils, suggesting that oxidation is a prerequisite in fibril disruption. The results of this work demonstrate that oxidized EGCG plays a more important role than the intact molecule in anti-amyloidogenic activity. These insights into the action of EGCG may provide a novel route to understand the anti-amyloidogenic activity of natural polyphenols. EGCG degrades through an oxidation pathway with half-lives less than 2 h. Oxidized EGCG displays stronger anti-amyloidogenic role than the native form. Ascorbic acid eliminates the disruptive effect of native EGCG on mature fibrils. The oxidation of EGCG cannot be neglected in its anti-amyloidogenic actions.
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Affiliation(s)
- Ting-Ting An
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Shuang Feng
- School of Chemical Engineering, Guizhou Institute of Technology, Guiyang 550003, China
| | - Cheng-Ming Zeng
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
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Fong‐ngern K, Vinaiphat A, Thongboonkerd V. Microvillar injury in renal tubular epithelial cells induced by calcium oxalate crystal and the protective role of epigallocatechin‐3‐gallate. FASEB J 2016; 31:120-131. [DOI: 10.1096/fj.201600543r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 09/16/2016] [Indexed: 02/05/2023]
Affiliation(s)
- Kedsarin Fong‐ngern
- Medical Proteomics Unit, Office for Research and DevelopmentFaculty of Medicine, Siriraj Hospital Bangkok Thailand
- Center for Research in Complex Systems ScienceMahidol University Bangkok Thailand
| | - Arada Vinaiphat
- Medical Proteomics Unit, Office for Research and DevelopmentFaculty of Medicine, Siriraj Hospital Bangkok Thailand
- Center for Research in Complex Systems ScienceMahidol University Bangkok Thailand
| | - Visith Thongboonkerd
- Medical Proteomics Unit, Office for Research and DevelopmentFaculty of Medicine, Siriraj Hospital Bangkok Thailand
- Center for Research in Complex Systems ScienceMahidol University Bangkok Thailand
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10
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Computational Approaches for the Discovery of Human Proteasome Inhibitors: An Overview. Molecules 2016; 21:molecules21070927. [PMID: 27438821 PMCID: PMC6274525 DOI: 10.3390/molecules21070927] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/11/2016] [Accepted: 07/12/2016] [Indexed: 01/10/2023] Open
Abstract
Proteasome emerged as an important target in recent pharmacological research due to its pivotal role in degrading proteins in the cytoplasm and nucleus of eukaryotic cells, regulating a wide variety of cellular pathways, including cell growth and proliferation, apoptosis, DNA repair, transcription, immune response, and signaling processes. The last two decades witnessed intensive efforts to discover 20S proteasome inhibitors with significant chemical diversity and efficacy. To date, the US FDA approved to market three proteasome inhibitors: bortezomib, carfilzomib, and ixazomib. However new, safer and more efficient drugs are still required. Computer-aided drug discovery has long being used in drug discovery campaigns targeting the human proteasome. The aim of this review is to illustrate selected in silico methods like homology modeling, molecular docking, pharmacophore modeling, virtual screening, and combined methods that have been used in proteasome inhibitors discovery. Applications of these methods to proteasome inhibitors discovery will also be presented and discussed to raise improvements in this particular field.
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11
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Masler EP. Protease inhibition by Heterodera glycines cyst content: evidence for effects on the Meloidogyne incognita proteasome. NEMATOLOGY 2015. [DOI: 10.1163/15685411-00002854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Proteases from Heterodera glycines and Meloidogyne incognita juveniles were inhibited by heat-stable content from H. glycines cysts (hHglCE), and by a polyphenol (EGCG) similar to a compound previously identified in Globodera cysts. General protease activities detected using the nematode peptide KSAYMRFa were inhibited by EGCG (IC50 1.19 mM, H. glycines; 0.34 mM, M. incognita) but not by hHglCE. However, hHglCE and EGCG each inhibited proteasome-associated chymotrypsin-like (CT-L) activity. EGCG IC50 values were 0.47 mM (H. glycines) and 0.15 mM (M. incognita). hHglCE IC50 values were 0.16 and 0.005 mM hHglCEeq μl−1 for H. glycines and M. incognita, respectively. Across all substrate-inhibitor combinations, M. incognita proteases were inhibited more robustly than those from H. glycines, particularly by hHglCE. In addition to CT-L protease, post-glutamate peptide hydrolysing (PGPH) and trypsin-like (T-L) proteasome proteases were detected in M. incognita, and each of these was also strongly inhibited by hHglCE. hHglCE inhibited CT-L, PGPH and T-L proteases within catalytic subunits from yeast (Saccharomyces cerevisiae) and human proteasomes. Proteasome inhibitors MG-132 and aclacinomycin A each inhibited M. incognita CT-L and PGPH activities by more than 80% at 20-100 μM, and hHglCE inhibited the same proteases by 70-80% at 0.04 hHglCEeq μl−1. hHglCE completely inhibited M. incognita T-L activity, but CT-L activity in native content from H. glycines cysts was not inhibited. Evidence that H. glycines cysts contain inhibitors of all proteases associated with the proteasome establishes the cyst as an important new target to explore for potential nematode control compounds. In addition, characterisation of protease activities from a core cellular metabolic component using M. incognita is novel for plant-parasitic nematodes.
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12
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Liberal J, Francisco V, Costa G, Figueirinha A, Amaral MT, Marques C, Girão H, Lopes MC, Cruz MT, Batista MT. Bioactivity of Fragaria vesca leaves through inflammation, proteasome and autophagy modulation. JOURNAL OF ETHNOPHARMACOLOGY 2014; 158 Pt A:113-122. [PMID: 25305515 DOI: 10.1016/j.jep.2014.09.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 09/25/2014] [Accepted: 09/28/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Fragaria vesca leaves have been used in folk medicine for the treatment of several diseases, namely gastrointestinal, cardiovascular and urinary disorders, which could be related with the potential anti-inflammatory properties of the extract. This work aims to disclose the bioactivity and the underlying action mechanism of an extract from Fragaria vesca leaves in order to support its traditional uses. MATERIALS AND METHODS A hydroalcoholic extract was prepared from Fragaria vesca leaves and its anti-inflammatory potential was evaluated through inhibition of nitric oxide production and expression of several pro-inflammatory proteins in lipopolysaccharide-triggered macrophages. Nitric oxide scavenger activity was also assessed using a standard nitric oxide donor. Since numerous inflammatory proteins are tightly regulated by ubiquitination and proteasomal degradation, the putative effect of the extract on these cellular proteolytic pathways was also disclosed. The phytochemical characterization was performed by HPLC-PDA-ESI/MSn and compared with an infusion prepared according to the traditional method. RESULTS For non-cytotoxic concentrations (80 and 160µg/mL) the extract inhibited nitrite production, probably due to a direct nitric oxide scavenging. Furthermore, inhibition of proteasome activity was verified, leading to accumulation of ubiquitinated proteins. The extract also increased the conversion of the microtubule-associated protein light chain LC3-I to LC3-II, a marker of autophagy. Polyphenols, namely ellagitannins, proanthocyanidins, and quercetin and kaempferol glucuronide derivatives were identified in Fragaria vesca leaves extract. Most of the identified phenolic compounds matched with those found in traditional preparation, the infusion. CONCLUSIONS The extract has a direct nitric oxide scavenging activity giving support to the traditional use of this plant for the treatment of inflammatory disorders. Furthermore, the extract affects the proteolytic systems but its role in cancer treatment requires further studies.
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Affiliation(s)
- Joana Liberal
- Center for Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; Center for Neurosciences and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Vera Francisco
- Center for Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; Center for Neurosciences and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Gustavo Costa
- Center for Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; Center for Neurosciences and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Artur Figueirinha
- Center for Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; Department of Environment, Polytechnic Institute of Viseu, Campus Politécnico de Repeses, 3504-510 Viseu, Portugal
| | - Maria Teresa Amaral
- Center for Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Carla Marques
- Centre of Ophthalmology and Vision Sciences, Institute for Biomedical Imaging and Life Sciences, IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Henrique Girão
- Centre of Ophthalmology and Vision Sciences, Institute for Biomedical Imaging and Life Sciences, IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Maria Celeste Lopes
- Center for Neurosciences and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Maria Teresa Cruz
- Center for Neurosciences and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
| | - Maria Teresa Batista
- Center for Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; Center for Neurosciences and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
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Monti MC, Margarucci L, Riccio R, Bonfili L, Mozzicafreddo M, Eleuteri AM, Casapullo A. Mechanistic insights on petrosaspongiolide M inhibitory effects on immunoproteasome and autophagy. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:713-21. [PMID: 24530967 DOI: 10.1016/j.bbapap.2014.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 01/21/2014] [Accepted: 02/06/2014] [Indexed: 11/20/2022]
Abstract
The proteasome, a complex multimeric structure strictly implicated in cell protein degradation, has gained the status of privileged drug target since its functional involvement in relevant pathways ruling the cell life, such as cell cycle, transcription and protein quality control, and the recent marketing of bortezomib as proteasome inhibitor for anti-cancer therapy. The marine γ-hydroxybutenolide terpenoid petrosaspongiolide M has been recently discovered as new proteasome inhibitor through a chemical proteomic approach and in cell biological assays. In this study a deep investigation has been carried out on the molecular mechanism of interaction of petrosaspongiolide M with the immunoproteasome, a proteasomal variant mainly involved in the immune responses. The results define a picture in which petrosaspongiolide M exerts its inhibitory activity by binding the active sites in the inner core of the immunoproteasome and/or covalently linking a Lys residue at the proteasome core/11S activator particle interface. Moreover, petrosaspongiolide M is also able to impair autophagy, a complementary pathway involved in protein degradation and cross-talking with the proteasome system. On this basis, petrosaspongiolide M could represent an interesting molecule for its propensity to modulate intracellular proteolysis through a dual inhibition of the immunoproteasome and autophagy.
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Affiliation(s)
- Maria Chiara Monti
- Dipartimento di Farmacia, Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Luigi Margarucci
- Dipartimento di Farmacia, Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Raffaele Riccio
- Dipartimento di Farmacia, Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Laura Bonfili
- School of Biosciences and Biotechnology, University of Camerino, via Gentile III da Varano, 62032 Camerino, Italy
| | - Matteo Mozzicafreddo
- School of Biosciences and Biotechnology, University of Camerino, via Gentile III da Varano, 62032 Camerino, Italy
| | - Anna Maria Eleuteri
- School of Biosciences and Biotechnology, University of Camerino, via Gentile III da Varano, 62032 Camerino, Italy.
| | - Agostino Casapullo
- Dipartimento di Farmacia, Università degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy.
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14
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Shen M, Chan TH, Dou QP. Targeting tumor ubiquitin-proteasome pathway with polyphenols for chemosensitization. Anticancer Agents Med Chem 2014; 12:891-901. [PMID: 22292765 DOI: 10.2174/187152012802649978] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 12/21/2011] [Accepted: 12/21/2011] [Indexed: 11/22/2022]
Abstract
The development of tumor drug resistance is one of the biggest obstacles on the way to achieve a favorable outcome of chemotherapy. Among various strategies that have been explored to overcome drug resistance, the combination of current chemotherapy with plant polyphenols as a chemosensitizer has emerged as a promising one. Plant polyphenols are a group of phytochemicals characterized by the presence of more than one phenolic group. Mechanistic studies suggest that polyphenols have multiple intracellular targets, one of which is the proteasome complex. The proteasome is a proteolytic enzyme complex responsible for intracellular protein degradation and has been shown to play an important role in tumor growth and the development of drug resistance. Therefore, proteasome inhibition by plant polyphenols could be one of the mechanisms contributing to their chemosensitizing effect. Plant polyphenols that have been identified to possess proteasome-inhibitory activity include (-)-epigallocatechins-3-gallate (EGCG), genistein, luteolin, apigenin, chrysin, quercetin, curcumin and tannic acid. These polyphenols have exhibited an appreciable effect on overcoming resistance to various chemotherapeutic drugs as well as multidrug resistance in a broad spectrum of tumors ranging from carcinoma and sarcoma to hematological malignances. The in vitro and in vivo studies on polyphenols with proteasome-inhibitory activity have built a solid foundation to support the idea that they could serve as a chemosensitizer for the treatment of cancer. In-depth mechanistic studies and identification of optimal regimen are needed in order to eventually translate this laboratory concept into clinical trials to actually benefit current chemotherapy.
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Affiliation(s)
- Min Shen
- Karmanos Cancer Institute, Wayne State University, 540.1 HWCRC, 4100 John R Road, Detroit, MI 48201, USA
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15
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Masler EP. Targeting internal processes of plant-parasitic nematodes in the pursuit of novel agents for their control. NEMATOLOGY 2014. [DOI: 10.1163/15685411-00002829] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The success of plant-parasitic nematodes as competitors with humans for crops is evidenced by the parasites’ significant and continuous economic drain on global agriculture. Scientific efforts dedicated to the control of plant-parasitic nematodes employ strategies from the environmental to molecular levels. Understanding the interaction of the nematode with its environment, and the molecules involved, offers great promise for novel control agent development. Perhaps more significantly, such knowledge facilitates the generation of ever more detailed and sophisticated information on nematode biology and new molecular targets. Among the most economically important groups of plant-parasitic nematodes are those comprising the cyst-forming species and the root-knot nematodes. Presented here is a brief overview of research into the biology of these parasites relative to their life cycles. Recent advances in elucidating the molecular biology and biochemistry of nematode-plant interactions during the internal parasitic stages of the life cycle have been driven by advances in genomics and transcriptomics. The remarkable discoveries regarding parasitism, and the application of genetic resources in these findings, provide a template for advanced investigation of external, survival stages biology. While survival biology research lags somewhat behind that of parasitism with regard to the molecular genetics of signalling and response, its extensive catalogue promises explosive rates of discovery as progress in genomics and transcriptomics allows a molecular genetic examination of embryogenesis, dormancy and hatching. Our group is interested in behaviour, development and hatching of cyst and root-knot nematodes, and the effects of the environment on the mechanisms of these activities. Phytochemical and temperature effects are discussed, and evidence is presented that the cyst may provide useful molecules for exploring nematode physiology.
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Affiliation(s)
- Edward P. Masler
- USDA-ARS Nematology Laboratory, 10300 Baltimore Avenue, Beltsville, MD 20705, USA
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16
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Pevzner Y, Metcalf R, Kantor M, Sagaro D, Daniel K. Recent advances in proteasome inhibitor discovery. Expert Opin Drug Discov 2013; 8:537-68. [DOI: 10.1517/17460441.2013.780020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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17
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Cha KH, Song DG, Kim SM, Pan CH. Inhibition of gastrointestinal lipolysis by green tea, coffee, and gomchui (Ligularia fischeri) tea polyphenols during simulated digestion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:7152-7157. [PMID: 22730927 DOI: 10.1021/jf301047f] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Green tea, coffee, and gomchui (Ligularia fischeri) tea, which are rich in polyphenols, may exhibit antiobesity effects by inhibiting pancreatic lipase. However, the bioavailability of some polyphenols is poor due to either degradation or absorption difficulties in the gastrointestinal tract, thus making their beneficial effects doubtful. This study was conducted to evaluate the inhibitory effect of three beverages on lipolysis and the contribution of their major polyphenols during simulated digestion. During simulated digestion, gomchui tea was the most potent at inhibiting gastrointestinal lipolysis, whereas green tea was the least potent. The strongest lipase inhibitor among purified major polyphenols was a green tea polyphenol, (-)-epigallocatechin gallate (EGCG, IC(50) = 1.8 ± 0.57 μM), followed by di-O-caffeoylquinic acid isomers (DCQA, IC(50) from 12.7 ± 4.5 to 40.4 ± 2.3 μM), which are gomchui tea polyphenols. However, the stability of DCQA was greater than that of EGCG when subjected to simulated digestion. Taken together, gomchui tea, which has DCQA as the major polyphenol, showed stronger lipolysis inhibitory activity during simulated digestion compared to both green tea and coffee.
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Affiliation(s)
- Kwang Hyun Cha
- Functional Food Center, Korea Institute of Science and Technology (KIST), Gangneung 210-340, Republic of Korea
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Di Domenico F, Foppoli C, Coccia R, Perluigi M. Antioxidants in cervical cancer: Chemopreventive and chemotherapeutic effects of polyphenols. Biochim Biophys Acta Mol Basis Dis 2012; 1822:737-47. [DOI: 10.1016/j.bbadis.2011.10.005] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2011] [Revised: 10/05/2011] [Accepted: 10/06/2011] [Indexed: 01/09/2023]
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