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Crudo F, Dellafiora L, Hong C, Burger L, Jobst M, Del Favero G, Marko D. Combined in vitro and in silico mechanistic approach to explore the potential of Alternaria mycotoxins alternariol and altertoxin II to hamper γH2AX formation in DNA damage signaling pathways. Toxicol Lett 2024; 394:1-10. [PMID: 38403206 DOI: 10.1016/j.toxlet.2024.02.008] [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: 10/19/2023] [Revised: 02/06/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
Risk assessment of food and environmental contaminants is faced by substantial data gaps and novel strategies are needed to support science-based regulatory actions. The Alternaria mycotoxins alternariol (AOH) and altertoxin II (ATXII) have garnered attention for their possible genotoxic effects. Nevertheless, data currently available are rather scattered, hindering a comprehensive hazard characterization. This study combined in vitro/in silico approaches to elucidate the potential of AOH and ATXII to induce double-strand breaks (DSBs) in HepG2 cells. Furthermore, it examines the impact of co-exposure to AOH and the DSB-inducing drug doxorubicin (Doxo) on γH2AX expression. AOH slightly increased γH2AX expression, whereas ATXII did not elicit this response. Interestingly, AOH suppressed Doxo-induced γH2AX expression, despite evidence of increased DNA damage in the comet assay. Building on these observations, AOH was postulated to inhibit γH2AX-forming kinases. Along this line, in silico analysis supported AOH potential interaction with the ATP-binding sites of these kinases and immunofluorescence experiments showed decreased intracellular phosphorylation events. Similarly, in silico results suggested that ATXII might also interact with these kinases. This study emphasizes the importance of understanding the implications of AOH-induced γH2AX expression inhibition on DNA repair processes and underscores the need for caution when interpreting γH2AX assay results.
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Affiliation(s)
- Francesco Crudo
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
| | - Luca Dellafiora
- Department of Food and Drug, University of Parma, Area Parco delle Scienze 27/A, Parma 43124, Italy
| | - Chenyifan Hong
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
| | - Lena Burger
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
| | - Maximilian Jobst
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria; Core Facility Multimodal Imaging, Faculty of Chemistry, University of Vienna, Währinger Str. 42, Vienna 1090, Austria; University of Vienna, Vienna Doctoral School in Chemistry (DoSChem), Währinger Str. 42, Vienna 1090, Austria
| | - Giorgia Del Favero
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria; Core Facility Multimodal Imaging, Faculty of Chemistry, University of Vienna, Währinger Str. 42, Vienna 1090, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria; Core Facility Multimodal Imaging, Faculty of Chemistry, University of Vienna, Währinger Str. 42, Vienna 1090, Austria.
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2
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Louro H, Vettorazzi A, López de Cerain A, Spyropoulou A, Solhaug A, Straumfors A, Behr AC, Mertens B, Žegura B, Fæste CK, Ndiaye D, Spilioti E, Varga E, Dubreil E, Borsos E, Crudo F, Eriksen GS, Snapkow I, Henri J, Sanders J, Machera K, Gaté L, Le Hegarat L, Novak M, Smith NM, Krapf S, Hager S, Fessard V, Kohl Y, Silva MJ, Dirven H, Dietrich J, Marko D. Hazard characterization of Alternaria toxins to identify data gaps and improve risk assessment for human health. Arch Toxicol 2024; 98:425-469. [PMID: 38147116 PMCID: PMC10794282 DOI: 10.1007/s00204-023-03636-8] [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: 10/30/2023] [Accepted: 11/09/2023] [Indexed: 12/27/2023]
Abstract
Fungi of the genus Alternaria are ubiquitous plant pathogens and saprophytes which are able to grow under varying temperature and moisture conditions as well as on a large range of substrates. A spectrum of structurally diverse secondary metabolites with toxic potential has been identified, but occurrence and relative proportion of the different metabolites in complex mixtures depend on strain, substrate, and growth conditions. This review compiles the available knowledge on hazard identification and characterization of Alternaria toxins. Alternariol (AOH), its monomethylether AME and the perylene quinones altertoxin I (ATX-I), ATX-II, ATX-III, alterperylenol (ALP), and stemphyltoxin III (STTX-III) showed in vitro genotoxic and mutagenic properties. Of all identified Alternaria toxins, the epoxide-bearing analogs ATX-II, ATX-III, and STTX-III show the highest cytotoxic, genotoxic, and mutagenic potential in vitro. Under hormone-sensitive conditions, AOH and AME act as moderate xenoestrogens, but in silico modeling predicts further Alternaria toxins as potential estrogenic factors. Recent studies indicate also an immunosuppressive role of AOH and ATX-II; however, no data are available for the majority of Alternaria toxins. Overall, hazard characterization of Alternaria toxins focused, so far, primarily on the commercially available dibenzo-α-pyrones AOH and AME and tenuazonic acid (TeA). Limited data sets are available for altersetin (ALS), altenuene (ALT), and tentoxin (TEN). The occurrence and toxicological relevance of perylene quinone-based Alternaria toxins still remain to be fully elucidated. We identified data gaps on hazard identification and characterization crucial to improve risk assessment of Alternaria mycotoxins for consumers and occupationally exposed workers.
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Affiliation(s)
- Henriqueta Louro
- Department of Human Genetics, National Institute of Health Dr. Ricardo Jorge (INSA) and Centre for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School, Universidade Nova de Lisboa, Av. Padre Cruz, 1649-016, Lisbon, Portugal
| | - Ariane Vettorazzi
- MITOX Research Group, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Nutrition, UNAV-University of Navarra, Pamplona, Spain
| | - Adela López de Cerain
- MITOX Research Group, Department of Pharmaceutical Sciences, Faculty of Pharmacy and Nutrition, UNAV-University of Navarra, Pamplona, Spain
| | - Anastasia Spyropoulou
- Laboratory of Toxicological Control of Pesticides, Scientific Directorate of Pesticides' Control and Phytopharmacy, Benaki Phytopathological Institute, 145 61, Attica, Greece
| | - Anita Solhaug
- Norwegian Veterinary Institute, PO Box 64, 1431, Ås, Norway
| | | | - Anne-Cathrin Behr
- Department Food Safety, BfR, German Federal Institute for Risk Assessment, Max-Dohrnstraße 8-10, 10589, Berlin, Germany
| | - Birgit Mertens
- Department of Chemical and Physical Health Risks, Sciensano, Brussels, Belgium
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna Pot 111, 1000, Ljubljana, Slovenia
| | | | - Dieynaba Ndiaye
- INRS, Institut National de Recherche et de Sécurité pour la Prévention des accidents du travail et des maladies professionnelles, Rue du Morvan, CS 60027, 54519, Vandœuvre Lès Nancy Cedex, France
| | - Eliana Spilioti
- Laboratory of Toxicological Control of Pesticides, Scientific Directorate of Pesticides' Control and Phytopharmacy, Benaki Phytopathological Institute, 145 61, Attica, Greece
| | - Elisabeth Varga
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Food Hygiene and Technology, University of Veterinary Medicine, Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Estelle Dubreil
- Toxicology of Contaminants Unit, Fougères Laboratory, French Agency for Food, Environmental and Occupational Health and Safety, 10 B rue Claude Bourgelat, 35306, Fougères, France
| | - Eszter Borsos
- Food Hygiene and Technology, University of Veterinary Medicine, Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Francesco Crudo
- Food Hygiene and Technology, University of Veterinary Medicine, Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | | | - Igor Snapkow
- Department of Chemical Toxicology, Norwegian Institute of Public Health, Lovisenberggate 8, 0456, Oslo, Norway
| | - Jérôme Henri
- Toxicology of Contaminants Unit, Fougères Laboratory, French Agency for Food, Environmental and Occupational Health and Safety, 10 B rue Claude Bourgelat, 35306, Fougères, France
| | - Julie Sanders
- Department of Chemical and Physical Health Risks, Sciensano, Brussels, Belgium
| | - Kyriaki Machera
- Laboratory of Toxicological Control of Pesticides, Scientific Directorate of Pesticides' Control and Phytopharmacy, Benaki Phytopathological Institute, 145 61, Attica, Greece
| | - Laurent Gaté
- INRS, Institut National de Recherche et de Sécurité pour la Prévention des accidents du travail et des maladies professionnelles, Rue du Morvan, CS 60027, 54519, Vandœuvre Lès Nancy Cedex, France
| | - Ludovic Le Hegarat
- Toxicology of Contaminants Unit, Fougères Laboratory, French Agency for Food, Environmental and Occupational Health and Safety, 10 B rue Claude Bourgelat, 35306, Fougères, France
| | - Matjaž Novak
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna Pot 111, 1000, Ljubljana, Slovenia
| | - Nicola M Smith
- Department of Chemical Toxicology, Norwegian Institute of Public Health, Lovisenberggate 8, 0456, Oslo, Norway
| | - Solveig Krapf
- Norwegian Veterinary Institute, PO Box 64, 1431, Ås, Norway
| | - Sonja Hager
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Valérie Fessard
- Toxicology of Contaminants Unit, Fougères Laboratory, French Agency for Food, Environmental and Occupational Health and Safety, 10 B rue Claude Bourgelat, 35306, Fougères, France
| | - Yvonne Kohl
- Fraunhofer Institute for Biomedical Engineering IBMT, Joseph-Von-Fraunhofer-Weg 1, 66280, Sulzbach, Germany
| | - Maria João Silva
- Department of Human Genetics, National Institute of Health Dr. Ricardo Jorge (INSA) and Centre for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School, Universidade Nova de Lisboa, Av. Padre Cruz, 1649-016, Lisbon, Portugal
| | - Hubert Dirven
- Department of Chemical Toxicology, Norwegian Institute of Public Health, Lovisenberggate 8, 0456, Oslo, Norway
| | - Jessica Dietrich
- Department Safety in the Food Chain, BfR, German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria.
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Crudo F, Hong C, Varga E, Del Favero G, Marko D. Genotoxic and Mutagenic Effects of the Alternaria Mycotoxin Alternariol in Combination with the Process Contaminant Acrylamide. Toxins (Basel) 2023; 15:670. [PMID: 38133174 PMCID: PMC10748053 DOI: 10.3390/toxins15120670] [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: 10/20/2023] [Revised: 11/18/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023] Open
Abstract
Humans are constantly exposed to mixtures of different xenobiotics through their diet. One emerging concern is the Alternaria mycotoxin alternariol (AOH), which can occur in foods typically contaminated by the process contaminant acrylamide (AA). AA is a byproduct of the Maillard reaction produced in carbohydrate-rich foods during thermal processing. Given the genotoxic properties of AOH and AA as single compounds, as well as their potential co-occurrence in food, this study aimed to assess the cytotoxic, genotoxic, and mutagenic effects of these compounds in combination. Genotoxicity was assessed in HepG2 cells by quantifying the phosphorylation of the histone γ-H2AX, induced as a response to DNA double-strand breaks (DSBs). Mutagenicity was tested in Salmonella typhimurium strains TA98 and TA100 by applying the Ames microplate format test. Our results showed the ability of AOH and AA to induce DSBs and increase revertant numbers in S. typhimurium TA100, with AOH being more potent than AA. However, no synergistic effects were observed during the combined treatments. Notably, the results of the study suggest that the compounds exert mutagenic effects primarily through base pair substitutions. In summary, the data indicate no immediate cause for concern regarding synergistic health risks associated with the consumption of foods co-contaminated with AOH and AA.
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Affiliation(s)
- Francesco Crudo
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38–40, 1090 Vienna, Austria; (F.C.); (C.H.); (E.V.); (G.D.F.)
| | - Chenyifan Hong
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38–40, 1090 Vienna, Austria; (F.C.); (C.H.); (E.V.); (G.D.F.)
| | - Elisabeth Varga
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38–40, 1090 Vienna, Austria; (F.C.); (C.H.); (E.V.); (G.D.F.)
| | - Giorgia Del Favero
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38–40, 1090 Vienna, Austria; (F.C.); (C.H.); (E.V.); (G.D.F.)
- Core Facility Multimodal Imaging Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 38–40, 1090 Vienna, Austria; (F.C.); (C.H.); (E.V.); (G.D.F.)
- Core Facility Multimodal Imaging Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
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Kozieł MJ, Habrowska-Górczyńska DE, Urbanek KA, Domińska K, Piastowska-Ciesielska AW, Kowalska K. Estrogen receptor α mediates alternariol-induced apoptosis and modulation of the invasiveness of ovarian cancer cells. Toxicol Lett 2023; 386:9-19. [PMID: 37683805 DOI: 10.1016/j.toxlet.2023.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 07/12/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023]
Abstract
Mycotoxins are secondary metabolites of fungi that may affect both human and animal health. Some of them possess estrogenic activity, due to direct binding to estrogen receptors (ERs) and hence disturb the hormonal balance of the organism. Alternariol (AOH) was previously reported as genotoxic, estrogenic and immunomodulatory agent. However, detailed mechanism of its action has not been fully elucidated. Estrogen receptor α (ERα) was previously reported to modulate the proliferation and invasiveness of ovarian cancer cells. Thus, we decided to verify whether estrogenic-like mycotoxin may affect ovarian cancer cells via ERα. The results showed that AOH induces apoptosis and oxidative stress and that these effects are partially modulated by ERα. Moreover, AOH decreases the invasion and migration of ovarian cancer cells and promotes changes in the expression of genes and proteins that are associated with the invasiveness of cancer i.e. MMP9, SNAIL1/2, ZEB1/2, VIM, CDH1 and CDH2. In conclusion, we postulate that AOH might significantly affect the viability and invasiveness of ovarian cancer cells via modulation of ERα and therefore possibly act as an endocrine disruptive agent in ovarian cancer cells.
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Affiliation(s)
- Marta Justyna Kozieł
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Lodz, Poland; Medical University of Lodz, BRaIn Laboratories, Lodz, Poland
| | | | - Kinga Anna Urbanek
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Lodz, Poland
| | - Kamila Domińska
- Medical University of Lodz, Department of Comparative Endocrinology, Lodz, Poland
| | - Agnieszka Wanda Piastowska-Ciesielska
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Lodz, Poland; Medical University of Lodz, BRaIn Laboratories, Lodz, Poland
| | - Karolina Kowalska
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Lodz, Poland.
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5
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Jaster-Keller J, Müller MEH, El-Khatib AH, Lorenz N, Bahlmann A, Mülow-Stollin U, Bunzel M, Scheibenzuber S, Rychlik M, von der Waydbrink G, Weigel S. Root uptake and metabolization of Alternaria toxins by winter wheat plants using a hydroponic system. Mycotoxin Res 2023; 39:109-126. [PMID: 36929507 PMCID: PMC10181980 DOI: 10.1007/s12550-023-00477-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 01/31/2023] [Accepted: 02/14/2023] [Indexed: 03/18/2023]
Abstract
Fungi of the genus Alternaria are ubiquitous in the environment. Their mycotoxins can leach out of contaminated plants or crop debris into the soil entering the plant via the roots. We aim to evaluate the importance of this entry pathway and its contribution to the overall content of Alternaria toxins (ATs) in wheat plants to better understand the soil-plant-phytopathogen system. A hydroponic cultivation system was established and wheat plants were cultivated for up to two weeks under optimal climate conditions. One half of the plants was treated with a nutrient solution spiked with alternariol (AOH), alternariol monomethyl ether (AME), and tenuazonic acid (TeA), whereas the other half of the plants was cultivated without mycotoxins. Plants were harvested after 1 and 2 weeks and analyzed using a QuEChERS-based extraction and an in-house validated LC-MS/MS method for quantification of the ATs in roots, crowns, and leaves separately. ATs were taken up by the roots and transported throughout the plant up to the leaves after 1 as well as 2 weeks of cultivation with the roots showing the highest ATs levels followed by the crowns and the leaves. In addition, numerous AOH and AME conjugates like glucosides, malonyl glucosides, sulfates, and di/trihexosides were detected in different plant compartments and identified by high-resolution mass spectrometry. This is the first study demonstrating the uptake of ATs in vivo using a hydroponic system and whole wheat plants examining both the distribution of ATs within the plant compartments and the modification of ATs by the wheat plants.
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Affiliation(s)
- Julia Jaster-Keller
- Department for Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max‑Dohrn‑Str. 8‑10, 10589, Berlin, Germany
| | - Marina E H Müller
- Leibniz Centre for Agricultural Landscape Research (ZALF), Eberswalder Str. 84, 15374, Müncheberg, Germany
| | - Ahmed H El-Khatib
- Department for Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max‑Dohrn‑Str. 8‑10, 10589, Berlin, Germany.
| | - Nicole Lorenz
- Department for Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max‑Dohrn‑Str. 8‑10, 10589, Berlin, Germany
| | - Arnold Bahlmann
- Department for Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max‑Dohrn‑Str. 8‑10, 10589, Berlin, Germany
| | - Ulrike Mülow-Stollin
- Department for Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max‑Dohrn‑Str. 8‑10, 10589, Berlin, Germany
- Current address: German Federal Office of Consumer Protection and Food Safety, Diedersdorfer Weg 1, 12277, Berlin, Germany
| | - Mirko Bunzel
- Department of Food Chemistry and Phytochemistry, Institute of Applied Biosciences, Karlsruhe Institute of Technology (KIT), South Campus, Adenauerring 20 A, Karlsruhe, Germany
| | - Sophie Scheibenzuber
- Chair of Analytical Food Chemistry, Department of Life Science Engineering, Technical University of Munich (TUM), Maximus-von-Imhof Forum 2, 85354, Freising, Germany
| | - Michael Rychlik
- Chair of Analytical Food Chemistry, Department of Life Science Engineering, Technical University of Munich (TUM), Maximus-von-Imhof Forum 2, 85354, Freising, Germany
| | - Grit von der Waydbrink
- Leibniz Centre for Agricultural Landscape Research (ZALF), Eberswalder Str. 84, 15374, Müncheberg, Germany
| | - Stefan Weigel
- Department for Safety in the Food Chain, German Federal Institute for Risk Assessment (BfR), Max‑Dohrn‑Str. 8‑10, 10589, Berlin, Germany
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Chen Y, Wang Y, Wang J, Zhou Z, Cao S, Zhang J. Strategies of Targeting CK2 in Drug Discovery: Challenges, Opportunities, and Emerging Prospects. J Med Chem 2023; 66:2257-2281. [PMID: 36745746 DOI: 10.1021/acs.jmedchem.2c01523] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
CK2 (casein kinase 2) is a serine/threonine protein kinase that is ubiquitous in eukaryotic cells and plays important roles in a variety of cellular functions, including cell growth, apoptosis, circadian rhythms, DNA damage repair, transcription, and translation. CK2 is involved in cancer pathogenesis and the occurrence of many diseases. Therefore, targeting CK2 is a promising therapeutic strategy. Although many CK2-specific small-molecule inhibitors have been developed, only CX-4945 has progressed to clinical trials. In recent years, novel CK2 inhibitors have gradually become a research hotspot, which is expected to overcome the limitations of traditional inhibitors. Herein, we summarize the structure, biological functions, and disease relevance of CK2 and emphatically analyze the structure-activity relationship (SAR) and binding modes of small-molecule CK2 inhibitors. We also discuss the latest progress of novel strategies, providing insights into new drugs targeting CK2 for clinical practice.
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Affiliation(s)
- Yijia Chen
- Joint Research Institution of Altitude Health, Department of Respiratory and Critical Care Medicine, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yuxi Wang
- Joint Research Institution of Altitude Health, Department of Respiratory and Critical Care Medicine, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Tianfu Jincheng Laboratory, Chengdu, Sichuan 610041, China
| | - Jiaxing Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Zhilan Zhou
- Joint Research Institution of Altitude Health, Department of Respiratory and Critical Care Medicine, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Shu Cao
- West China School of Stomatology Sichuan University, Chengdu, Sichuan 610064, China
| | - Jifa Zhang
- Joint Research Institution of Altitude Health, Department of Respiratory and Critical Care Medicine, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.,Tianfu Jincheng Laboratory, Chengdu, Sichuan 610041, China
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7
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Louisse J, Dellafiora L, van den Heuvel JJMW, Rijkers D, Leenders L, Dorne JLCM, Punt A, Russel FGM, Koenderink JB. Perfluoroalkyl substances (PFASs) are substrates of the renal human organic anion transporter 4 (OAT4). Arch Toxicol 2023; 97:685-696. [PMID: 36436016 PMCID: PMC9968691 DOI: 10.1007/s00204-022-03428-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 11/16/2022] [Indexed: 11/29/2022]
Abstract
Poly- and perfluoroalkyl substances (PFASs) are omnipresent in the environment and have been shown to accumulate in humans. Most PFASs are not biotransformed in animals and humans, so that elimination is largely dependent on non-metabolic clearance via bile and urine. Accumulation of certain PFASs in humans may relate to their reabsorption from the pre-urine by transporter proteins in the proximal tubules of the kidney, such as URAT1 and OAT4. The present study assessed the in vitro transport of 7 PFASs (PFHpA, PFOA, PFNA, PFDA, PFBS, PFHxS and PFOS) applying URAT1- or OAT4-transfected human embryonic kidney (HEK) cells. Virtually no transport of PFASs could be measured in URAT1-transfected HEK cells. All PFASs, except PFBS, showed clear uptake in OAT4-transfected HEK cells. In addition, these in vitro results were further supported by in silico docking and molecular dynamic simulation studies assessing transporter-ligand interactions. Information on OAT4-mediated transport may provide insight into the accumulation potential of PFASs in humans, but other kinetic aspects may play a role and should also be taken into account. Quantitative information on all relevant kinetic processes should be integrated in physiologically based kinetic (PBK) models, to predict congener-specific accumulation of PFASs in humans in a more accurate manner.
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Affiliation(s)
- Jochem Louisse
- Wageningen Food Safety Research, Wageningen University and Research, Wageningen, The Netherlands.
| | - Luca Dellafiora
- grid.10383.390000 0004 1758 0937Department of Food and Drug, University of Parma, 43124 Parma, Italy
| | - Jeroen J. M. W. van den Heuvel
- grid.461760.20000 0004 0580 1253Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences (RIMLS), Nijmegen, The Netherlands
| | - Deborah Rijkers
- grid.4818.50000 0001 0791 5666Wageningen Food Safety Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Liz Leenders
- grid.4818.50000 0001 0791 5666Wageningen Food Safety Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Jean-Lou C. M. Dorne
- grid.483440.f0000 0004 1792 4701Methodological and Scientific Support Unit, European Food Safety Authority, Via Carlo Magno 1A, 43124 Parma, Italy
| | - Ans Punt
- grid.4818.50000 0001 0791 5666Wageningen Food Safety Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Frans G. M. Russel
- grid.461760.20000 0004 0580 1253Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences (RIMLS), Nijmegen, The Netherlands
| | - Jan B. Koenderink
- grid.461760.20000 0004 0580 1253Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences (RIMLS), Nijmegen, The Netherlands
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A mechanistic investigation on kokumi-active γ-Glutamyl tripeptides – A computational study to understand molecular basis of their activity and to identify novel potential kokumi-tasting sequences. Food Res Int 2022; 162:111932. [DOI: 10.1016/j.foodres.2022.111932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/17/2022]
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9
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Geris R, Pinho MA, Boffo EF, Simpson TJ. Naturally Occurring Partially Reduced Perylenequinones from Fungi. JOURNAL OF NATURAL PRODUCTS 2022; 85:2236-2250. [PMID: 36098709 DOI: 10.1021/acs.jnatprod.2c00368] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This Review provides a critical analysis of the literature covering the naturally occurring partially reduced perylenequinones (PQs) from fungi without carbon substituents (which can be named class A perylenequinones) and discusses their structures, stereochemistry, biosynthesis, and biological activities as appropriate. Perylenequinones are natural pigments with a perylene skeleton produced by certain fungi, aphids, some plants, and animal species. These compounds display several biological activities, e.g., antimicrobial, anti-HIV, photosensitizers, cytotoxic, and phytotoxic. It describes 36 fungal PQs and cites 81 references, covering from 1956 to August 2022.
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Affiliation(s)
- Regina Geris
- Laboratório de Biotecnologia e Química de Microrganismos (LBQM), Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo S/n, 40170-115 Salvador, Brasil
| | - Matheus A Pinho
- Laboratório de Biotecnologia e Química de Microrganismos (LBQM), Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo S/n, 40170-115 Salvador, Brasil
| | - Elisangela F Boffo
- Laboratório de Biotecnologia e Química de Microrganismos (LBQM), Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo S/n, 40170-115 Salvador, Brasil
| | - Thomas J Simpson
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
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10
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Lammi C, Boschin G, Bartolomei M, Arnoldi A, Galaverna G, Dellafiora L. Mechanistic Insights into Angiotensin I-Converting Enzyme Inhibitory Tripeptides to Decipher the Chemical Basis of Their Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11572-11578. [PMID: 36074807 PMCID: PMC9501895 DOI: 10.1021/acs.jafc.2c04755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/29/2022] [Accepted: 08/29/2022] [Indexed: 06/15/2023]
Abstract
Food proteins are an important source of bioactive peptides, and the angiotensin I-converting enzyme (ACE) inhibitors are worthy of attention for their possible beneficial effects in subjects with mild hypertension. However, the chemical basis underpinning their activity is not well-understood, hampering the discovery of novel inhibitory sequences from the plethora of peptides encrypted in food proteins. This work combined computational and in vitro investigations to describe precisely the chemical basis of potent inhibitory tripeptides. A substantial set of previously uncharacterized tripeptides have been investigated in silico and in vitro, and LCP was described for the first time as a potent ACE inhibitory peptide with IC50 values of 8.25 and 6.95 μM in cell-free and cell-based assays, respectively. The outcomes presented could serve to better understand the chemical basis of already characterized potent inhibitory tripeptides or as a blueprint to design novel and potent inhibitory peptides and peptide-like molecules.
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Affiliation(s)
- Carmen Lammi
- Department
of Pharmaceutical Sciences, University of
Milan, Via Mangiagalli 25, Milan 20133, Italy
| | - Giovanna Boschin
- Department
of Pharmaceutical Sciences, University of
Milan, Via Mangiagalli 25, Milan 20133, Italy
| | - Martina Bartolomei
- Department
of Pharmaceutical Sciences, University of
Milan, Via Mangiagalli 25, Milan 20133, Italy
| | - Anna Arnoldi
- Department
of Pharmaceutical Sciences, University of
Milan, Via Mangiagalli 25, Milan 20133, Italy
| | - Gianni Galaverna
- Department
of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, Parma 43124, Italy
| | - Luca Dellafiora
- Department
of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, Parma 43124, Italy
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11
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Fan J, Sun S, Lv C, Li Z, Guo M, Yin Y, Wang H, Wang W. Discovery of mycotoxin alternariol as a potential lead compound targeting xanthine oxidase. Chem Biol Interact 2022; 360:109948. [DOI: 10.1016/j.cbi.2022.109948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/04/2022] [Accepted: 04/11/2022] [Indexed: 12/01/2022]
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12
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Ibrahim SRM, Bagalagel AA, Diri RM, Noor AO, Bakhsh HT, Muhammad YA, Mohamed GA, Omar AM. Exploring the Activity of Fungal Phenalenone Derivatives as Potential CK2 Inhibitors Using Computational Methods. J Fungi (Basel) 2022; 8:jof8050443. [PMID: 35628699 PMCID: PMC9143076 DOI: 10.3390/jof8050443] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/21/2022] [Accepted: 04/21/2022] [Indexed: 02/06/2023] Open
Abstract
Cancer represents one of the most prevalent causes of global death. CK2 (casein kinase 2) activation boosted cancer proliferation and progression. Therefore, CK2 inhibition can have a crucial role in prohibiting cancer progression and enhancing apoptosis. Fungi have gained vast interest as a wealthy pool of anticancer metabolites that could particularly target various cancer progression-linked signaling pathways. Phenalenones are a unique class of secondary metabolites that possess diverse bioactivities. In the current work, the CK2 inhibitory capacity of 33 fungal phenalenones was explored using computational studies. After evaluating the usefulness of the compounds as enzyme inhibitors by ADMET prediction, the compounds were prepared for molecular docking in the CK2-α1 crystal structure (PDB: 7BU4). Molecular dynamic simulation was performed on the top two scoring compounds to evaluate their binding affinity and protein stability through a simulated physiological environment. Compound 19 had a superior binding affinity to the co-crystallized ligand (Y49). The improved affinity can be attributed to the fact that the aliphatic chain makes additional contact with Asp120 in a pocket distant from the active site.
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Affiliation(s)
- Sabrin R. M. Ibrahim
- Department of Chemistry, Preparatory Year Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
- Correspondence: ; Tel.: +966-581183034
| | - Alaa A. Bagalagel
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.A.B.); (R.M.D.); (A.O.N.); (H.T.B.)
| | - Reem M. Diri
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.A.B.); (R.M.D.); (A.O.N.); (H.T.B.)
| | - Ahmad O. Noor
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.A.B.); (R.M.D.); (A.O.N.); (H.T.B.)
| | - Hussain T. Bakhsh
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.A.B.); (R.M.D.); (A.O.N.); (H.T.B.)
| | - Yosra A. Muhammad
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (Y.A.M.); (A.M.O.)
- Center for Artificial Intelligence in Precision Medicines, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Gamal A. Mohamed
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Abdelsattar M. Omar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (Y.A.M.); (A.M.O.)
- Center for Artificial Intelligence in Precision Medicines, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Azhar University, Cairo 11884, Egypt
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13
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Xu A, Wen ZH, Su SX, Chen YP, Liu WC, Guo SQ, Li XF, Zhang X, Li R, Xu NB, Wang KX, Li WX, Guan DG, Duan CZ. Elucidating the Synergistic Effect of Multiple Chinese Herbal Prescriptions in the Treatment of Post-stroke Neurological Damage. Front Pharmacol 2022; 13:784242. [PMID: 35355727 PMCID: PMC8959705 DOI: 10.3389/fphar.2022.784242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 02/14/2022] [Indexed: 12/12/2022] Open
Abstract
Background: Traditional Chinese medicine (TCM) has been widely used in the treatment of human diseases. However, the synergistic effects of multiple TCM prescriptions in the treatment of stroke have not been thoroughly studied. Objective of the study: This study aimed to reveal the mechanisms underlying the synergistic effects of these TCM prescriptions in stroke treatment and identify the active compounds. Methods: Herbs and compounds in the Di-Tan Decoction (DTD), Xue-Fu Zhu-Yu Decoction (XFZYD), and Xiao-Xu-Ming Decoction (XXMD) were acquired from the TCMSP database. SEA, HitPick, and TargetNet web servers were used for target prediction. The compound-target (C-T) networks of three prescriptions were constructed and then filtered using the collaborative filtering algorithm. We combined KEGG enrichment analysis, molecular docking, and network analysis approaches to identify active compounds, followed by verification of these compounds with an oxygen-glucose deprivation and reoxygenation (OGD/R) model. Results: The filtered DTD network contained 39 compounds and 534 targets, the filtered XFZYD network contained 40 compounds and 508 targets, and the filtered XXMD network contained 55 compounds and 599 targets. The filtered C-T networks retained approximately 80% of the biological functions of the original networks. Based on the enriched pathways, molecular docking, and network analysis results, we constructed a complex network containing 3 prescriptions, 14 botanical drugs, 26 compounds, 13 targets, and 5 pathways. By calculating the synergy score, we identified the top 5 candidate compounds. The experimental results showed that quercetin, baicalin, and ginsenoside Rg1 independently and synergistically increased cell viability. Conclusion: By integrating pharmacological and chemoinformatic approaches, our study provides a new method for identifying the effective synergistic compounds of TCM prescriptions. The filtered compounds and their synergistic effects on stroke require further research.
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Affiliation(s)
- Anqi Xu
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Zhuo-Hua Wen
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Shi-Xing Su
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yu-Peng Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Southern Medical University, Guangzhou, China
| | - Wen-Chao Liu
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Shen-Quan Guo
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xi-Feng Li
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xin Zhang
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Ran Li
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Ning-Bo Xu
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Ke-Xin Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Southern Medical University, Guangzhou, China
| | - Wen-Xing Li
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Southern Medical University, Guangzhou, China
| | - Dao-Gang Guan
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Southern Medical University, Guangzhou, China
| | - Chuan-Zhi Duan
- Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, National Key Clinical Specialty/Engineering Technology Research Center of Education Ministry of China, Neurosurgery Institute, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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14
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Persistence of the antagonistic effects of a natural mixture of Alternaria mycotoxins on the estrogen-like activity of human feces after anaerobic incubation. Toxicol Lett 2022; 358:88-99. [DOI: 10.1016/j.toxlet.2022.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 11/09/2021] [Accepted: 01/27/2022] [Indexed: 11/19/2022]
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15
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Aichinger G. Natural Dibenzo-α-Pyrones: Friends or Foes? Int J Mol Sci 2021; 22:ijms222313063. [PMID: 34884865 PMCID: PMC8657677 DOI: 10.3390/ijms222313063] [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: 11/05/2021] [Revised: 11/29/2021] [Accepted: 11/30/2021] [Indexed: 12/17/2022] Open
Abstract
Natural dibenzo-α-pyrones (DAPs) can be viewed from two opposite angles. From one angle, the gastrointestinal metabolites urolithins are regarded as beneficial, while from the other, the emerging mycotoxin alternariol and related fungal metabolites are evaluated critically with regards to potential hazardous effects. Thus, the important question is: can the structural characteristics of DAP subgroups be held responsible for distinct bioactivity patterns? If not, certain toxicological and/or pharmacological aspects of natural DAPs might yet await elucidation. Thus, this review focuses on comparing published data on the two groups of natural DAPs regarding both adverse and beneficial effects on human health. Literature on genotoxic, estrogenic, endocrine-disruptive effects, as well as on the induction of the cellular anti-oxidative defense system, anti-inflammatory properties, the inhibition of kinases, the activation of mitophagy and the induction of autophagy, is gathered and critically reviewed. Indeed, comparing published data suggests similar bioactivity profiles of alternariol and urolithin A. Thus, the current stratification into hazardous Alternaria toxins and healthy urolithins seems debatable. An extrapolation of bioactivities to the other DAP sub-class could serve as a promising base for further research. Conclusively, urolithins should be further evaluated toward high-dose toxicity, while alternariol derivatives could be promising chemicals for the development of therapeutics.
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Affiliation(s)
- Georg Aichinger
- Laboratory of Toxicology, Department of Health Sciences and Technology, ETH Zurich, 8092 Zurich, Switzerland
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16
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Estrogen Receptor β Participates in Alternariol-Induced Oxidative Stress in Normal Prostate Epithelial Cells. Toxins (Basel) 2021; 13:toxins13110766. [PMID: 34822550 PMCID: PMC8621730 DOI: 10.3390/toxins13110766] [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: 09/06/2021] [Revised: 10/27/2021] [Accepted: 10/27/2021] [Indexed: 12/12/2022] Open
Abstract
Alternaria toxins are considered as emerging mycotoxins, however their toxicity has not been fully evaluated in humans. Alternariol (AOH), the most prevalent Alternaria mycotoxin, was previously reported to be genotoxic and to affect hormonal balance in cells; however, its direct molecular mechanism is not known. The imbalance in androgen/estrogen ratio as well as chronic inflammation are postulated as factors in prostate diseases. The environmental agents affecting the hormonal balance might participate in prostate carcinogenesis. Thus, this study evaluated the effect of two doses of AOH on prostate epithelial cells. We observed that AOH in a dose of 10 µM induces oxidative stress, DNA damage and cell cycle arrest and that this effect is partially mediated by estrogen receptor β (ERβ) whereas the lower tested dose of AOH (0.1 µM) induces only oxidative stress in cells. The modulation of nuclear erythroid-related factor 2 (Nrf2) was observed in response to the higher dose of AOH. The use of selective estrogen receptor β (ERβ) inhibitor PHTPP revealed that AOH-induced oxidative stress in both tested doses is partially dependent on activation of ERβ, but lack of its activation did not protect cells against AOH-induced ROS production or DNA-damaging effect in case of higher dose of AOH (10 µM). Taken together, this is the first study reporting that AOH might affect basic processes in normal prostate epithelial cells associated with benign and malignant changes in prostate tissue.
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17
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Aichinger G, Del Favero G, Warth B, Marko D. Alternaria toxins-Still emerging? Compr Rev Food Sci Food Saf 2021; 20:4390-4406. [PMID: 34323368 DOI: 10.1111/1541-4337.12803] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 12/13/2022]
Abstract
Alternaria molds are known to cause the contamination of food with their secondary metabolites, a chemically very heterogeneous group of compounds. Yet, after decades of research on the occurrence and the toxicity of Alternaria toxins in academia, no regulation has been implemented yet, thus leaving these potential food contaminants in the status of so-called "emerging mycotoxins". However, research on this topic has been far from static, leading to the European Food Safety Authority repeatedly calling for more data on the occurrence and toxicity of genotoxic metabolites such as alternariol (AOH) and its monomethyl ether (AME). To give an overview on recent developments in the field, this comprehensive review summarizes published data and addresses current challenges arising from the chemical complexity of Alternaria's metabolome, mixture effects and the emergence of novel biological targets like cell membranes or the interaction with different receptors. Besides toxicodynamics, we review recent research on toxicokinetics, including the first in vivo studies which incorporated the rarely investigated-but highly genotoxic-perylene quinones. Furthermore, a particular focus lies on the advances of liquid chromatography/tandem mass spectrometry (LC-MS/MS)-based analytical tools for determining a broader spectrum of Alternaria toxins including modified/masked forms and assessing exposure via human biomonitoring (HBM).
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Affiliation(s)
- Georg Aichinger
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Wien, Austria
| | - Giorgia Del Favero
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Wien, Austria
| | - Benedikt Warth
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Wien, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Wien, Austria
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18
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Kowalska K, Habrowska-Górczyńska DE, Kozieł MJ, Urbanek KA, Domińska K, Piastowska-Ciesielska AW. Mycotoxin Alternariol (AOH) Affects Viability and Motility of Mammary Breast Epithelial Cells. Int J Mol Sci 2021; 22:ijms22020696. [PMID: 33445675 PMCID: PMC7828135 DOI: 10.3390/ijms22020696] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/09/2021] [Accepted: 01/10/2021] [Indexed: 02/07/2023] Open
Abstract
Mycotoxins are present in everyday diet as common food and feed pollutants. A part of them is still concerned as so-called emerging mycotoxins. Due to the lack of toxicity data, the safety limits and detail molecular mechanism have been not established yet for all of them. Alternariol (AOH), as one of these mycotoxins, produced by Alternaria species, is so far reported as an estrogenic, genotoxic, and immunomodulatory agent; however, its direct effect on human health is not known. Especially, in the case of hormone-dependent tissues which are sensitive to both endogenic, as well as external estrogenic agents, it might be crucial to assess the effect of AOH. Thus, this study evaluated how exposure to AOH affects viability and motility of the human normal mammary gland epithelial in vitro model. We observed that AOH significantly affects viability of cells in a time- and dose-dependent manner. Moreover, the induction of oxidative stress, DNA damage, and cell cycle arrest in the G2/M cell cycle phase was observed. The motility of 184A1 cells was also significantly affected. On the molecular level, AOH induced antioxidative stress response via activation of Nuclear factor erythroid 2-related factor 2 (NRF2) signaling pathway agents, as well as decrease in the phosphorylation of protein kinase B (Akt) and p44/42 (ERK 1-2) molecules, indicating that AOH might affect crucial signaling pathways in both physiological and pathophysiological processes in breast tissue.
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Affiliation(s)
- Karolina Kowalska
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Zeligowskiego 7/9, 90-752 Lodz, Poland; (D.E.H.-G.); (M.J.K.); (K.A.U.)
- Correspondence: (K.K.); (A.W.P.-C.)
| | - Dominika Ewa Habrowska-Górczyńska
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Zeligowskiego 7/9, 90-752 Lodz, Poland; (D.E.H.-G.); (M.J.K.); (K.A.U.)
| | - Marta Justyna Kozieł
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Zeligowskiego 7/9, 90-752 Lodz, Poland; (D.E.H.-G.); (M.J.K.); (K.A.U.)
| | - Kinga Anna Urbanek
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Zeligowskiego 7/9, 90-752 Lodz, Poland; (D.E.H.-G.); (M.J.K.); (K.A.U.)
| | - Kamila Domińska
- Medical University of Lodz, Department of Comparative Endocrinology, Zeligowskiego 7/9, 90-752 Lodz, Poland;
| | - Agnieszka Wanda Piastowska-Ciesielska
- Medical University of Lodz, Department of Cell Cultures and Genomic Analysis, Zeligowskiego 7/9, 90-752 Lodz, Poland; (D.E.H.-G.); (M.J.K.); (K.A.U.)
- Correspondence: (K.K.); (A.W.P.-C.)
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19
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Crudo F, Barilli A, Mena P, Rotoli BM, Rio DD, Dall'Asta C, Dellafiora L. An in vitro study on the transport and phase II metabolism of the mycotoxin alternariol in combination with the structurally related gut microbial metabolite urolithin C. Toxicol Lett 2021; 340:15-22. [PMID: 33421552 DOI: 10.1016/j.toxlet.2021.01.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/29/2020] [Accepted: 01/03/2021] [Indexed: 01/20/2023]
Abstract
Alternariol is a mycotoxin produced by Alternaria spp. relevant to the food safety area due to its abundance in certain foods. The shortage of data on its toxicology, also as a part of chemical mixtures, prevents setting regulation to limit its abundance in food. To extend knowledge on the possible mechanisms underpinning alternariol toxicology in chemical mixtures, this work assessed the effects of urolithin C, a structurally related gut ellagitannin-derived metabolite, on its absorption and phase II metabolism in a monolayer of Caco-2 cells. A computational study was also used to provide a mechanistic explanation for the results obtained. Urolithin C influenced transport and phase II metabolism of alternariol with a late reduction of transport to the basolateral compartment. Moreover, it caused an early effect in terms of accumulation of alternariol glucuronides in the basolateral compartment, followed by a late reduction of glucuronides in both compartments. Concerning alternariol sulfates, the data collected pointed to a possible competition of urolithin C for the sulfotransferases resulting in a reduced production of alternariol sulfates. Our results provide a compelling line-of-evidence pointing to the need to systematically tackle the evaluation of mycotoxin toxicity in the context of chemical mixture.
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Affiliation(s)
- Francesco Crudo
- Department of Food and Drug, University of Parma, Area Parco Delle Scienze 27/A, 43124 Parma, Italy
| | - Amelia Barilli
- Department of Medicine and Surgery (DiMeC), University of Parma, Via Volturno 39, 43125, Parma, Italy
| | - Pedro Mena
- Human Nutrition Unit, Department of Food and Drug, University of Parma, Via Volturno 39, 43125, Parma, Italy
| | - Bianca Maria Rotoli
- Department of Medicine and Surgery (DiMeC), University of Parma, Via Volturno 39, 43125, Parma, Italy
| | - Daniele Del Rio
- Human Nutrition Unit, Department of Veterinary Science, University of Parma, Via Volturno 39, 43125, Parma, Italy
| | - Chiara Dall'Asta
- Department of Food and Drug, University of Parma, Area Parco Delle Scienze 27/A, 43124 Parma, Italy
| | - Luca Dellafiora
- Department of Food and Drug, University of Parma, Area Parco Delle Scienze 27/A, 43124 Parma, Italy.
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