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The theory of interceptor-protector action of DNA binding drugs. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 149:131-146. [PMID: 30991057 DOI: 10.1016/j.pbiomolbio.2019.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/01/2019] [Accepted: 04/09/2019] [Indexed: 11/21/2022]
Abstract
The review discusses the theory of interceptor-protector action (the IPA theory) as the new self-consistent biophysical theory establishing a quantitative interrelation between parameters measured in independent physico-chemical experiment and in vitro biological experiment for the class of DNA binding drugs. The elements of the theory provide complete algorithm of analysis, which may potentially be applied to any system of DNA targeting aromatic drugs. Such analytical schemes, apart from extension of current scientific knowledge, are important in the context of rational drug design for managing drug's response by changing the physico-chemical parameters of molecular complexation.
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Makarska-Bialokoz M. Comparative study of binding interactions between porphyrin systems and aromatic compounds of biological importance by multiple spectroscopic techniques: A review. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 200:263-274. [PMID: 29694930 DOI: 10.1016/j.saa.2018.04.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/13/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
The specific spectroscopic and redox properties of porphyrins predestine them to fulfill the role of sensors during interacting with different biologically active substances. Monitoring of binding interactions in the systems porphyrin-biologically active compound is a key question not only in the field of physiological functions of living organisms, but also in environmental protection, notably in the light of the rapidly growing drug consumption and concurrently the production of drug effluents. Not always beneficial action of drugs on natural porphyrin systems induces to further studies, with commercially available porphyrins as the model systems. Therefore the binding process between several water-soluble porphyrins and a series of biologically active compounds (e.g. caffeine, guanine, theophylline, theobromine, xanthine, uric acid) has been studied in different aqueous solutions analyzing their absorption and steady-state fluorescence spectra, the porphyrin fluorescence lifetimes and their quantum yields. The magnitude of the binding and fluorescence quenching constants values for particular quenchers decreases in a series: uric acid > guanine > caffeine > theophylline > theobromine > xanthine. In all the systems studied there are characters of static quenching, as a consequence of the π-π-stacked non-covalent and non-fluorescent complexes formation between porphyrins and interacting compounds, accompanied simultaneously by the additional specific binding interactions. The porphyrin fluorescence quenching can be explain by the photoinduced intermolecular electron transfer from aromatic compound to the center of the porphyrin molecule, playing the role of the binding site. Presented results can be valuable for designing of new fluorescent porphyrin chemosensors or monitoring of drug traces in aqueous solutions. The obtained outcomes have also the toxicological and medical importance, providing insight into the interactions of the water-soluble porphyrins with biologically active substances.
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Affiliation(s)
- Magdalena Makarska-Bialokoz
- Department of Inorganic Chemistry, Maria Curie-Sklodowska University, M. C. Sklodowska Sq. 2, 20-031 Lublin, Poland.
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Giorgi C, Marchi S, Simoes IC, Ren Z, Morciano G, Perrone M, Patalas-Krawczyk P, Borchard S, Jȩdrak P, Pierzynowska K, Szymański J, Wang DQ, Portincasa P, Wȩgrzyn G, Zischka H, Dobrzyn P, Bonora M, Duszynski J, Rimessi A, Karkucinska-Wieckowska A, Dobrzyn A, Szabadkai G, Zavan B, Oliveira PJ, Sardao VA, Pinton P, Wieckowski MR. Mitochondria and Reactive Oxygen Species in Aging and Age-Related Diseases. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2018; 340:209-344. [PMID: 30072092 PMCID: PMC8127332 DOI: 10.1016/bs.ircmb.2018.05.006] [Citation(s) in RCA: 214] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Aging has been linked to several degenerative processes that, through the accumulation of molecular and cellular damage, can progressively lead to cell dysfunction and organ failure. Human aging is linked with a higher risk for individuals to develop cancer, neurodegenerative, cardiovascular, and metabolic disorders. The understanding of the molecular basis of aging and associated diseases has been one major challenge of scientific research over the last decades. Mitochondria, the center of oxidative metabolism and principal site of reactive oxygen species (ROS) production, are crucial both in health and in pathogenesis of many diseases. Redox signaling is important for the modulation of cell functions and several studies indicate a dual role for ROS in cell physiology. In fact, high concentrations of ROS are pathogenic and can cause severe damage to cell and organelle membranes, DNA, and proteins. On the other hand, moderate amounts of ROS are essential for the maintenance of several biological processes, including gene expression. In this review, we provide an update regarding the key roles of ROS-mitochondria cross talk in different fundamental physiological or pathological situations accompanying aging and highlighting that mitochondrial ROS may be a decisive target in clinical practice.
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Affiliation(s)
- Carlotta Giorgi
- Department of Morphology Surgery and Experimental Medicine, Section of Pathology Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI), Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
| | - Saverio Marchi
- Department of Morphology Surgery and Experimental Medicine, Section of Pathology Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI), Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
| | - Ines C.M. Simoes
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Ziyu Ren
- Department of Cell and Developmental Biology, Consortium for Mitochondrial Research, University College London, London, United Kingdom
| | - Giampaolo Morciano
- Department of Morphology Surgery and Experimental Medicine, Section of Pathology Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI), Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
- Cecilia Hospital, GVM Care & Research, 48033 Cotignola, Ravenna, Italy
- Maria Pia Hospital, GVM Care & Research, Torino, Italy
| | - Mariasole Perrone
- Department of Morphology Surgery and Experimental Medicine, Section of Pathology Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI), Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
| | - Paulina Patalas-Krawczyk
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Sabine Borchard
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Paulina Jȩdrak
- Department of Molecular Biology, University of Gdańsk, Gdańsk, Poland
| | | | - Jȩdrzej Szymański
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - David Q. Wang
- Department of Medicine, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Piero Portincasa
- Clinica Medica “A. Murri”, Dept. of Biomedical Sciences & Human Oncology, University of Bari "Aldo Moro" Medical School, Bari, Italy
| | - Grzegorz Wȩgrzyn
- Department of Molecular Biology, University of Gdańsk, Gdańsk, Poland
| | - Hans Zischka
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
- Institute of Toxicology and Environmental Hygiene, Technical University Munich, Munich, Germany
| | - Pawel Dobrzyn
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Massimo Bonora
- Departments of Cell Biology and Gottesman Institute for Stem Cell & Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Jerzy Duszynski
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Alessandro Rimessi
- Department of Morphology Surgery and Experimental Medicine, Section of Pathology Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI), Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
| | | | | | - Gyorgy Szabadkai
- Department of Cell and Developmental Biology, Consortium for Mitochondrial Research, University College London, London, United Kingdom
- The Francis Crick Institute, London, United Kingdom
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Barbara Zavan
- Cecilia Hospital, GVM Care & Research, 48033 Cotignola, Ravenna, Italy
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Paulo J. Oliveira
- CNC - Center for Neuroscience and Cell Biology, UC-Biotech, Biocant Park, University of Coimbra, Cantanhede, Portugal
| | - Vilma A. Sardao
- CNC - Center for Neuroscience and Cell Biology, UC-Biotech, Biocant Park, University of Coimbra, Cantanhede, Portugal
| | - Paolo Pinton
- Department of Morphology Surgery and Experimental Medicine, Section of Pathology Oncology and Experimental Biology, Interdisciplinary Center for the Study of Inflammation (ICSI), Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy
- Cecilia Hospital, GVM Care & Research, 48033 Cotignola, Ravenna, Italy
| | - Mariusz R. Wieckowski
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
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4
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Pentoxifylline affects idarubicin binding to DNA. Bioorg Chem 2016; 65:118-25. [DOI: 10.1016/j.bioorg.2016.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 02/17/2016] [Accepted: 02/18/2016] [Indexed: 01/21/2023]
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5
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Intermolecular hydrogen bonds in hetero-complexes of biologically active aromatic ligands: Monte Carlo simulations results. Struct Chem 2015. [DOI: 10.1007/s11224-015-0696-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gołuński G, Borowik A, Wyrzykowski D, Woziwodzka A, Piosik J. Pentoxifylline as a modulator of anticancer drug doxorubicin. Part I: Reduction of doxorubicin DNA binding. Chem Biol Interact 2015; 242:291-8. [PMID: 26499448 DOI: 10.1016/j.cbi.2015.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 10/07/2015] [Accepted: 10/08/2015] [Indexed: 12/26/2022]
Abstract
Pentoxifylline--biologically active aromatic compound--has a well established capability to sequester aromatic ligands, such as an anticancer drug--doxorubicin--in mixed stacking aggregates. Formation of such hetero-complexes may influence biological activity of secluded drug. Presented work shows assessment of pentoxifylline influence on doxorubicin direct interactions with DNA employing biophysical methods. Achievement of this goal required statistical-thermodynamical model allowing numerical four-parameter analysis of experimental mixture--an issue that was successfully tackled by merging McGhee--von Hippel and Kapuscinski--Kimmel models. Results obtained with new model are well in agreement with data obtained with separate experiments with each of these two models and show reduction of doxorubicin in free (monomeric, dimeric) and complexed with DNA forms in favor of doxorubicin-pentoxifylline complexes with increasing pentoxifylline concentration. Developed model appears to be a universal tool allowing numerical analysis of mixtures containing self-aggregating ligand, DNA, and modulating agent.
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Affiliation(s)
- Grzegorz Gołuński
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology UG-MUG, Kładki 24, 80-822, Gdańsk, Poland
| | - Agnieszka Borowik
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology UG-MUG, Kładki 24, 80-822, Gdańsk, Poland
| | - Dariusz Wyrzykowski
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308, Gdańsk, Poland
| | - Anna Woziwodzka
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology UG-MUG, Kładki 24, 80-822, Gdańsk, Poland.
| | - Jacek Piosik
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology UG-MUG, Kładki 24, 80-822, Gdańsk, Poland.
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Makarska-Bialokoz M. Spectroscopic evidence of xanthine compounds fluorescence quenching effect on water-soluble porphyrins. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Preliminary assessment of mutagenic and anti-mutagenic potential of some aminoalkanolic derivatives of xanthone by use of the Vibrio harveyi assay. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2014; 768:8-13. [PMID: 24769486 DOI: 10.1016/j.mrgentox.2014.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 01/23/2014] [Accepted: 02/02/2014] [Indexed: 12/26/2022]
Abstract
The Vibrio harveyi assay was used to evaluate mutagenic and anti-mutagenic effects of four new aminoalkanolic derivatives of xanthone with anticonvulsant activity, to select the potentially safe compounds for further in vivo studies in animal models. The study showed that at a concentration of 40 ng/ml the test compounds were not mutagenic. Additionally, two of the investigated compounds, namely the (R,S)-N-methyl-1-amino-2-propanol derivative of 6-methoxyxanthone (compound III) and the (R)-N-methyl-2-amino-1-butanol derivative of 7-chloroxanthone (compound IV) were strong inhibitors of the mutagenicity induced by 4-nitroquinoline-N-oxide (4-NQO) in V. harveyi strains BB7M and BB7XM. The inhibition percentages for compound IV were 49 (in BB7M) and 69 (in BB7XM), whereas for compound III these percentages were 47 (in BB7M) and 42 (in BB7XM), respectively. The present study demonstrates that four bioactive derivatives of xanthone display no mutagenic activity in the V. harveyi assay. In addition, compounds III and IV demonstrated considerable anti-mutagenic activity in this test. Based on the results obtained here, these compounds could be selected for further studies in animal models, while compounds III and IV should be tested further for their anti-mutagenic properties.
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9
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Antimutagenic compounds and their possible mechanisms of action. J Appl Genet 2014; 55:273-85. [PMID: 24615570 PMCID: PMC3990861 DOI: 10.1007/s13353-014-0198-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/20/2014] [Accepted: 01/31/2014] [Indexed: 12/23/2022]
Abstract
Mutagenicity refers to the induction of permanent changes in the DNA sequence of an organism, which may result in a heritable change in the characteristics of living systems. Antimutagenic agents are able to counteract the effects of mutagens. This group of agents includes both natural and synthetic compounds. Based on their mechanism of action among antimutagens, several classes of compounds may be distinguished. These are compounds with antioxidant activity; compounds that inhibit the activation of mutagens; blocking agents; as well as compounds characterized with several modes of action. It was reported previously that several antitumor compounds act through the antimutagenic mechanism. Hence, searching for antimutagenic compounds represents a rapidly expanding field of cancer research. It may be observed that, in recent years, many publications were focused on the screening of both natural and synthetic compounds for their beneficial muta/antimutagenicity profile. Thus, the present review attempts to give a brief outline on substances presenting antimutagenic potency and their possible mechanism of action. Additionally, in the present paper, a screening strategy for mutagenicity testing was presented and the characteristics of the most widely used antimutagenicity assays were described.
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Woziwodzka A, Gołuński G, Wyrzykowski D, Kaźmierkiewicz R, Piosik J. Caffeine and other methylxanthines as interceptors of food-borne aromatic mutagens: inhibition of Trp-P-1 and Trp-P-2 mutagenic activity. Chem Res Toxicol 2013; 26:1660-73. [PMID: 24102551 DOI: 10.1021/tx4002513] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Caffeine is one of the most important biologically active food components. In this article, we demonstrate that caffeine and other methylxanthines significantly reduce the mutagenic activity of two food-derived heterocyclic aromatic amines, Trp-P-1 and Trp-P-2 in the Salmonella typhimurium TA98 strain. Moreover, protection against Trp-P-1-induced mutagenicity was independent of liver S9 enzymatic fraction, suggesting that mechanisms other than modulation of mutagen bioactivation can contribute to the observed protective effects. UV-vis spectroscopy and computational studies revealed that methylxanthines intercept Trp-P-1 and Trp-P-2 in noncovalent molecular complexes, with association constants (KAC) in the 10(2) M(-1) range. Enthalpy values (ΔH about -30 kJ·mol(-1)) of mutagen-methylxanthine heterocomplexation obtained microcalorimetrically correspond to stacking (π-π) interactions. Finally, we demonstrated that the biological activity of Trp-P-1 and Trp-P-2 is strictly dependent on the presence of the mutagen in a free (unbound with methylxanthine) form, suggesting that mutagen sequestration in stacking heterocomplexes with methylxanthines can decrease its bioavailability and diminish its biological effects.
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Affiliation(s)
- Anna Woziwodzka
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology UG-MUG , Kładki 24, 80-822 Gdańsk, Poland
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Pękala E, Liana P, Kubowicz P, Powroźnik B, Obniska J, Chlebek I, Węgrzyn A, Węgrzyn G. Evaluation of mutagenic and antimutagenic properties of new derivatives of pyrrolidine-2,5-dione with anti-epileptic activity, by use of the Vibrio harveyi mutagenicity test. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2013; 758:18-22. [PMID: 24060509 DOI: 10.1016/j.mrgentox.2013.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 05/29/2013] [Accepted: 07/09/2013] [Indexed: 10/26/2022]
Abstract
The Vibrio harveyi test was used to evaluate mutagenic and antimutagenic properties of nineteen new derivatives of pyrrolidine-2,5-dione (compounds 1-19) with antiepileptic activity. Four V. harveyi strains were used: BB7 (wild type) and the genetically modified strains BB7M, BB7X and BB7XM (i.e. strains with additional mucA and mucB genes, UV hypersensitivity, and UV hypersensitivity with plasmid pAB91273, respectively). None of the derivatives of 2-ethyl-2-methylsuccinic acid (compounds 1-7) had mutagenic activity against the tester strains of V. harveyi, but this set had strong or moderate antimutagenic activity against 4-nitroquinoline-N-oxide (NQNO) in the tester strains BB7, BB7X, and BB7M. This antimutagenic activity ranged from 51% to 67%, through 51-66% to 71-83% for V. harveyi BB7, BB7X and BB7M strains, respectively. Mutagenic activities in the group of 2,2-diphenyl-succinic acid derivatives (compounds 8-19) were variable and depended on the tester strain used. Compounds 8-19 were devoid of mutagenic properties against BB7 (wild-type strain). Among this group only compound 9, with the fluorine substituent in position 2 of the aromatic system, was devoid of mutagenic potential against all tester strains. The compounds in this group (8-19) demonstrated strong antimutagenic activity only against strain BB7 (inhibition ranging from 51% to 71%). We conclude that there are various mutagenic and antimutagenic activities of derivatives of pyrrolidine-2,5-dione. Moreover, our studies have proven that the V. harveyi test can be applied for primary mutagenicity and antimutagenicity assessment of these new compounds.
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Affiliation(s)
- Elżbieta Pękala
- Department of Pharmaceutical Biochemistry, Faculty of Pharmacy, Jagiellonian University, Medical College, Medyczna 9, 30-688 Kraków, Poland.
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Heterocyclic Aromatic Amines Heterocomplexation with Biologically Active Aromatic Compounds and Its Possible Role in Chemoprevention. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/740821] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Food-borne heterocyclic aromatic amines (HCAs) are known mutagens and carcinogens present especially in Western population diet, which contains large amount of meat and its products. HCAs are capable of interacting with DNA directly through the formation of covalent adducts, however this process requires biological activation in liver, mainly by cytochrome P450 enzymes. This process may produce mutations and in consequence may contribute to the development of cancer. However, there are many studies showing that several biologically active aromatic compounds (BACs) may protect against genotoxic effects of HCAs. Direct interactions and noncovalent heterocomplexes formation may be one of the most important mechanisms of such protection. This work describes several BACs present in human diet, which are capable of molecular complexes formation with HCAs and protect cells as well as whole organisms against HCAs action.
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Abstract
The association between water-soluble porphyrins: 4,4′,4″,4‴-(21 H,23 H-porphine-5,10,15,20-tetrayl)tetrakis-(benzoic acid) (H2TCPP), 5,10,15,20-tetrakis(4-sulfonatophenyl)-21 H,23 H-porphine (H2TPPS4), 5,10,15,20-tetrakis[4-(trimethylammonio)phenyl]-21 H,23 H-porphine tetra-p-tosylate (H2TTMePP), 5,10,15,20-tetrakis(1-methyl-4-pyridyl)-21 H,23 H-porphine tetra-p-tosylate (H2TMePyP), the Cu(II) complexes of H2TTMePP and H2TMePyP, as well as chlorophyll a with caffeine (1,3,7-trimethylxanthine) has been studied analysing their absorption and emission spectra in aqueous (or acetone in case of chlorophyll a) solution. During the titration by caffeine the porphyrins absorption spectra undergo the evolution – the bathochromic effect can be observed as well as the hypochromicity of the Soret maximum. The association constants were calculated using curve-fitting procedure (KAC of the order of magnitude of 103 mol-1). Whereas the emission spectra point at the presence of the fluorescence quenching effect testifying for the partial inactivation of the porphyrin molecule. The fluorescence quenching constants were calculated from Stern-Volmer plots. The results obtained show that caffeine can interact with water-soluble porphyrins and through formation of stacking complexes is able to quench their ability to emission.
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Woziwodzka A, Gwizdek-Wiśniewska A, Piosik J. Caffeine, pentoxifylline and theophylline form stacking complexes with IQ-type heterocyclic aromatic amines. Bioorg Chem 2010; 39:10-7. [PMID: 21146849 DOI: 10.1016/j.bioorg.2010.11.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 10/29/2010] [Accepted: 11/03/2010] [Indexed: 12/20/2022]
Abstract
Methylxanthines (MTX), in particular caffeine (CAF), are known as the most widely consumed alkaloids worldwide. Many accumulated statistical data indicate the protective effect of CAF intake against several types of cancer. One of the possible explanations of this phenomenon is direct non-covalent interaction between CAF and aromatic mutagen/carcinogen molecules through stacking (π-π) complexes formation. Here we demonstrate that CAF and other MTX, pentoxifylline (PTX) and theophylline (TH), form stacking complexes with carcinogenic imidazoquinoline-type (IQ-type) food-borne heterocyclic aromatic amines (HCAs). We estimated neighborhood association constants (K(AC) of the order of magnitude of 10(2)M(-1)) in neutral and acidic environment and enthalpy changes (ΔH values between -15.1 and -39.8kJ/mol) for these interactions using UV-Vis spectroscopy, calculations based on thermodynamical model of mixed aggregation and titration microcalorimetry. Moreover, using Ames test with Salmonella typhimurium TA98 strain and recently developed mutagenicity assay based on bioluminescence of Vibrio harveyi A16 strain, we demonstrated a statistically significant reduction in HCAs mutagenic activity in the presence of MTX.
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Affiliation(s)
- Anna Woziwodzka
- Department of Molecular and Cellular Biology, Intercollegiate Faculty of Biotechnology UG and MUG, Kładki 24, Gdańsk, Poland
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15
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Słoczyńska K, Pekala E, Wajda A, Wegrzyn G, Marona H. Evaluation of mutagenic and antimutagenic properties of some bioactive xanthone derivatives using Vibrio harveyi test. Lett Appl Microbiol 2009; 50:252-7. [PMID: 20025647 DOI: 10.1111/j.1472-765x.2009.02781.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS Drug safety evaluation plays an important role in the early phase of drug development, especially in the preclinical identification of compounds' biological activity. The Vibrio harveyi assay was used to assess mutagenic and antimutagenic activity of some aminoalkanolic derivatives of xanthone (1-5), which were synthesized and evaluated for their anticonvulsant and hemodynamic activities. METHODS AND RESULTS A novel V. harveyi assay was used to assess mutagenic and antimutagenic activity of derivatives of xanthone 1-5. Two V. harveyi strains were used: BB7 (natural isolate) and BB7M (BB7 derivative containing mucA and mucB genes on a plasmid pAB91273, products of these genes enhance error-prone DNA repair). According to the results obtained, the most beneficial mutagenic and antimutagenic profiles were observed for compounds 2 and 3. A modification of the chemical structure of compound 2 by the replacement of the hydroxy group by a chloride improved considerably the antimutagenic activity of the compound. Thus, antimutagenic potency reached a maximum with the presence of tertiary amine and chloride atom in the side chain. CONCLUSIONS Among the newly synthesized aminoalkanolic derivatives of xanthone with potential anticonvulsant properties, there are some compounds exhibiting in vitro antimutagenic activity. In addition, it appears that the V. harveyi assay can be applied for primary mutagenicity and antimutagenicity assessment of compounds. SIGNIFICANCE AND IMPACT OF THE STUDY The obtained preliminary mutagenicity and antimutagenicity results encourage further search in the group of amino derivatives of xanthone as the potential antiepileptic drugs also presenting some antimutagenic potential. Furthermore, V. harveyi test may be a useful tool for compounds safety evaluation.
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Affiliation(s)
- K Słoczyńska
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University, Medical College, Cracow, Poland
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