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Pietrzak M, Szabelski M, Wołąkiewicz G, Wieczorek Z. Spectroscopy studies of interaction hypericin with an anti-cancer therapy drug doxorubicin. Biophys Chem 2022; 288:106858. [PMID: 35905651 DOI: 10.1016/j.bpc.2022.106858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/05/2022] [Accepted: 07/15/2022] [Indexed: 11/02/2022]
Abstract
The presented study was designed to estimate the ability of hypericin to interact with the anticancer drug doxorubicin. The hetero-association of hypericin and doxorubicin was investigated with absorption and fluorescence spectroscopy methods in aqueous solution of DMSO in two-component mixtures: doxorubicin-hypericin and three component mixtures: DNA-doxorubicin-hypericin. The data indicate that hypericin forms complexes with doxorubicin and that the association constants are on the order of 300,000 M-1 in a buffer with 30% DMSO content. The absorption spectra of the hypericin - doxorubicin complexes were examined as well. Owing to its ability to interact with flat aromatic compounds, hypericin may potentially be used as an interceptor molecule to detoxification of patients after chemotherapy.
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Affiliation(s)
- Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland.
| | - Mariusz Szabelski
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Grzegorz Wołąkiewicz
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
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2
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Kostjukova LO, Leontieva SV, Kostjukov VV. The vibronic absorption spectra and electronic states of acridine orange in aqueous solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 249:119302. [PMID: 33341748 DOI: 10.1016/j.saa.2020.119302] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/28/2020] [Accepted: 11/29/2020] [Indexed: 06/12/2023]
Abstract
The time-dependent density functional theory (TD-DFT) was used to obtain vibronic absorption spectra of acridine orange dye (AO) in an aqueous solution that were in good agreement with the experiment. The protonated and neutral forms of the dye have been investigated. The results of calculations using various functionals and basis sets have been analyzed. The best agreement with experiment was given by the level of theory X3LYP/6-31G(d,p). AO molecular orbitals involved in electronic transitions due light absorption in the visible region of the spectrum have been obtained. The dipole moments and atomic charges of the ground and excited states of the AO molecule have been calculated. Maps of the electrostatic potential have been drawn. An insignificant photoinduced electron transfer was found in the central ring of the chromophore of the dye molecule. According to our calculations, the vibronic coupling and the Boltzmann distribution play a significant role in the absorption spectra of the AO.
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Affiliation(s)
- Lyudmila O Kostjukova
- Physics Department, Nakhimov Black Sea Higher Naval School, Dybenko st., 1a, Sevastopol, Crimea 299028
| | - Svetlana V Leontieva
- Physics Department, Nakhimov Black Sea Higher Naval School, Dybenko st., 1a, Sevastopol, Crimea 299028
| | - Victor V Kostjukov
- Physics Department, Sevastopol State University, Universitetskaya st., 33, Sevastopol, Crimea 299053.
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Buchelnikov AS, Evstigneev VP, Evstigneev MP. Hetero-association models of non-covalent molecular complexation. Phys Chem Chem Phys 2019; 21:7717-7731. [PMID: 30931443 DOI: 10.1039/c8cp03183e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The present review discusses the current state-of-the-art in building models enabling the description of non-covalent equilibrium complexation of different types of molecules in solution, which results in the formation of supramolecular structures different in length and composition (hetero-association or supramolecular multicomponent co-polymerisation). The description is focused on standard physical and chemical quantities such as experimental observables and equilibrium parameters of interaction (equilibrium constants and concentrations). The major partial cases of the hetero-association models, such as finite and indefinite isodesmic and cooperative complexations, and Benesi-Hildebrand and Langmuir adsorption models are considered. Future challenges in the development of the hetero-association models are provided.
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Development of high efficacy peptide coated iron oxide nanoparticles encapsulated amphotericin B drug delivery system against visceral leishmaniasis. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:1465-1471. [DOI: 10.1016/j.msec.2017.02.145] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/13/2016] [Accepted: 02/24/2017] [Indexed: 11/20/2022]
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5
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Pietrzak M, Szabelski M, Kasparek A, Wieczorek Z. Interactions of hypericin with a model mutagen – Acridine orange analyzed by light absorption and fluorescence spectroscopy. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.12.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Nkohkwo A, Agbor G, Asongalem E, Tagny C, Asonganyi T. Whole blood pathogen reduction technology and blood safety in sub-Saharan Africa: A systematic review with regional discussion. Afr J Lab Med 2016; 5:363. [PMID: 28879109 PMCID: PMC5436399 DOI: 10.4102/ajlm.v5i1.363] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Accepted: 03/01/2016] [Indexed: 11/17/2022] Open
Abstract
Background Despite vast improvements in transfusion services in sub-Saharan Africa over the last decade, there remain serious concerns on the safety and adequacy of the blood supply across the region. Objective This review paper ascertains the role of pathogen reduction technology (PRT) in improving blood safety and supply adequacy in the region. Method The state of blood safety in sub-Saharan Africa was reviewed. Meetings, seminars and correspondence were undertaken with key clinicians, scientists and professional bodies in the region, including the World Health Organization’s Regional Office for Africa, to examine the suitability of PRT for improving the safety of whole blood transfusion, a prevalent transfusion format in the region. Results Existing literature suggests that combining PRT with current blood safety measures (such as serology) would improve the safety and adequacy of the blood supply for transfusions in sub-Saharan Africa. This was echoed by the findings of the stakeholder meetings. Conclusion Following a detailed appraisal of two leading PRT systems, the Mirasol® PRT System and the Cerus S-303 System, we suggest that companies conduct comprehensive toxicological evaluation of the agents used for PRT and publish this in the scientific literature. We also recommend that the safety and efficacy of these technologies should be established in a randomised clinical trial conducted in sub-Saharan Africa.
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Affiliation(s)
| | - Gabriel Agbor
- Department of Biochemistry, Institute of Medical Research and Medicinal Plants Studies, Yaoundé, Cameroon
| | - Emmanuel Asongalem
- Department of Biomedical Sciences, Faculty of Health Sciences, University of Buea and Toxicology Society, Buea, Cameroon
| | - Claude Tagny
- Haematology and Blood Transfusion Service, University Teaching Hospital, Yaoundé, Cameroon
| | - Tazoacha Asonganyi
- Department of Biochemistry and Immunology, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
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Mekuria SL, Debele TA, Chou HY, Tsai HC. IL-6 Antibody and RGD Peptide Conjugated Poly(amidoamine) Dendrimer for Targeted Drug Delivery of HeLa Cells. J Phys Chem B 2015; 120:123-30. [PMID: 26670944 DOI: 10.1021/acs.jpcb.5b11125] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, PAMAM dendrimer (G4.5) was conjugated with two targeting moieties, IL-6 antibody and RGD peptide (G4.5-IL6 and G4.5-RGD conjugates). Doxorubicin anticancer drug was physically loaded onto G4.5-IL6 and G4.5-RGD with the encapsulation efficiency of 51.3 and 30.1% respectively. The cellular internalization and uptake efficiency of G4.5-IL6/DOX and G4.5-RGD/DOX complexes was observed and compared by confocal microscopy and flow cytometry using HeLa cells, respectively. The lower IC50 value of G4.5-IL6/DOX in comparison to G4.5-RGD/DOX is indication that higher drug loading and faster drug release rate corresponded with greater cytotoxicity. The cytotoxic effect was further verified by increment in late apoptotic/necrotic cells due to delivery of drug through receptor-mediated endocytosis. On the basis of these results, G4.5-IL6 is a better suited carrier for targeted drug delivery of DOX to cervical cancer cells.
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Affiliation(s)
- Shewaye Lakew Mekuria
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology , Taipei 106, Taiwan ROC
| | - Tilahun Ayane Debele
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology , Taipei 106, Taiwan ROC
| | - Hsiao-Ying Chou
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology , Taipei 106, Taiwan ROC
| | - Hsieh-Chih Tsai
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology , Taipei 106, Taiwan ROC
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Ungvarsky J, Plsikova J, Janovec L, Koval J, Mikes J, Mikesová L, Harvanova D, Fedorocko P, Kristian P, Kasparkova J, Brabec V, Vojtickova M, Sabolova D, Stramova Z, Rosocha J, Imrich J, Kozurkova M. Novel trisubstituted acridines as human telomeric quadruplex binding ligands. Bioorg Chem 2014; 57:13-29. [PMID: 25171773 DOI: 10.1016/j.bioorg.2014.07.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 07/25/2014] [Accepted: 07/27/2014] [Indexed: 11/24/2022]
Abstract
A novel series of trisubstituted acridines were synthesized with the aim of mimicking the effects of BRACO19. These compounds were synthesized by modifying the molecular structure of BRACO19 at positions 3 and 6 with heteroacyclic moieties. All of the derivatives presented in the study exhibited stabilizing effects on the human telomeric DNA quadruplex. UV-vis spectroscopy, circular dichroism, linear dichroism and viscosimetry were used in order to study the nature of the DNA binding in more detail. The results show that all of the novel derivatives were able to fold the single-stranded DNA sequences into antiparallel G-quadruplex structures, with derivative 15 exhibiting the highest stabilizing capability. Cell cycle analysis revealed that a primary trend of the "braco"-like derivatives was to arrest the cells in the S- and G2M-phases of the cell cycle within the first 72h, with derivative 13 and BRACO19 proving particularly effective in suppressing cell proliferation. All studies derivatives were less toxic to human fibroblast cell line in comparison with HT 29 cancer cell line.
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Affiliation(s)
- Jan Ungvarsky
- Department of Organic Chemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Jana Plsikova
- Department of Biochemistry, Moyzesova 11, 04001 Kosice, Slovak Republic; Associated Tissue Bank of Faculty of Medicine, L. Pasteur University Hospital, Trieda SNP 1, 04166 Kosice, Slovak Republic
| | - Ladislav Janovec
- Department of Organic Chemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Jan Koval
- Department of Cellular Biology, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Jaromir Mikes
- Department of Cellular Biology, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Lucia Mikesová
- Department of Cellular Biology, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Denisa Harvanova
- Associated Tissue Bank of Faculty of Medicine, L. Pasteur University Hospital, Trieda SNP 1, 04166 Kosice, Slovak Republic
| | - Peter Fedorocko
- Department of Cellular Biology, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Pavol Kristian
- Department of Organic Chemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Jana Kasparkova
- Institute of Biophysics, Department of Molecular Biophysics and Pharmacology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Viktor Brabec
- Institute of Biophysics, Department of Molecular Biophysics and Pharmacology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Maria Vojtickova
- Department of Organic Chemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Danica Sabolova
- Department of Biochemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Zuzana Stramova
- Department of Biochemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Jan Rosocha
- Associated Tissue Bank of Faculty of Medicine, L. Pasteur University Hospital, Trieda SNP 1, 04166 Kosice, Slovak Republic
| | - Jan Imrich
- Department of Organic Chemistry, Moyzesova 11, 04001 Kosice, Slovak Republic
| | - Maria Kozurkova
- Department of Biochemistry, Moyzesova 11, 04001 Kosice, Slovak Republic.
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10
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Pietrzak M, Maciejczyk M, Szabelski M, Kasparek A, Wieczorek Z. Self-association of hypericin analyzed by light absorption and fluorescence spectroscopy and molecular dynamics simulations. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.076] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Nigam S, Chandra S, Newgreen DF, Bahadur D, Chen Q. Poly(ethylene glycol)-modified PAMAM-Fe3O4-doxorubicin triads with the potential for improved therapeutic efficacy: generation-dependent increased drug loading and retention at neutral pH and increased release at acidic pH. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1004-1011. [PMID: 24446987 DOI: 10.1021/la404246h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polyamidoamine (PAMAM) dendrimer-coated magnetic nanoparticles are a promising drug-delivery system that can enhance the therapeutic effects of chemotherapy drugs, such as doxorubicin (DOX), with minimized side effects. This work explores the optimization of the potential therapeutic efficiency of PAMAM-Fe3O4-DOX triads. Different generations (G3, G5, and G6) of PAMAMs were synthesized and modified with poly(ethylene glycol) (PEG) and then used to encapsulate glutamic acid-modified Fe3O4 nanoparticles. The Fe3O4-dendrimer carriers (Fe3O4-DGx where x = the generation 3, 5, or 6 of dendrimers) were electrostatically conjugated with drug DOX. The loading and releasing efficiencies of DOX increased with the PAMAM generation from 3 to 6. The loading efficiencies of DOX molecules were 87, 93, and 96% for generations 3, 5, and 6, respectively. At pH 5, the DOX release efficiencies within 24 h were approximately 60, 68, and 80% for generations 3, 5, and 6, respectively. At pH 7.4, the DOX releasing efficiency was as low as ∼ 15%. Compared to the negative control, the PAMAM-Fe3O4-DOX triads showed only mild toxicity against human cervical adenocarcinoma cell line HeLa at pH 7.4, which indicated that DOX can be fairly benignly carried and sparingly released until PAMAM-Fe3O4-DOX is taken up into the cell.
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Affiliation(s)
- Saumya Nigam
- IITB-Monash Research Academy, IIT Bombay , Mumbai 400076, India
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12
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Ouattara M, Pennati A, Devlin DJ, Huang YS, Gadda G, Eichenbaum Z. Kinetics of heme transfer by the Shr NEAT domains of Group A Streptococcus. Arch Biochem Biophys 2013; 538:71-9. [PMID: 23993953 DOI: 10.1016/j.abb.2013.08.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 08/06/2013] [Accepted: 08/14/2013] [Indexed: 01/07/2023]
Abstract
The hemolytic Group A Streptococcus (GAS) is a notorious human pathogen. Shr protein of GAS participates in iron acquisition by obtaining heme from host hemoglobin and delivering it to the adjacent receptor on the surface, Shp. Heme is then conveyed to the SiaABC proteins for transport across the membrane. Using rapid kinetic studies, we investigated the role of the two heme binding NEAT modules of Shr. Stopped-flow analysis showed that holoNEAT1 quickly delivered heme to apoShp. HoloNEAT2 did not exhibit such activity; only little and slow transfer of heme from NEAT2 to apoShp was seen, suggesting that Shr NEAT domains have distinctive roles in heme transport. HoloNEAT1 also provided heme to apoNEAT2, by a fast and reversible process. To the best of our knowledge this is the first transfer observed between isolated NEAT domains of the same receptor. Sequence alignment revealed that Shr NEAT domains belong to two families of NEAT domains that are conserved in Shr orthologs from several species. Based on the heme transfer kinetics, we propose that Shr proteins modulate heme uptake according to heme availability by a mechanism where NEAT1 facilitates fast heme delivery to Shp, whereas NEAT2 serves as a temporary storage for heme on the bacterial surface.
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Affiliation(s)
- Mahamoudou Ouattara
- Department of Biology, College of Arts and Sciences, Georgia State University, Atlanta, GA 30303, USA
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14
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Effenberger-Neidnicht K, Breyer S, Mahal K, Sasse F, Schobert R. Modification of uptake and subcellular distribution of doxorubicin by N-acylhydrazone residues as visualised by intrinsic fluorescence. Cancer Chemother Pharmacol 2011; 69:85-90. [DOI: 10.1007/s00280-011-1675-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2011] [Accepted: 05/07/2011] [Indexed: 01/31/2023]
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15
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Sieczkowski E, Lehner C, Ambros PF, Hohenegger M. Double impact on p-glycoprotein by statins enhances doxorubicin cytotoxicity in human neuroblastoma cells. Int J Cancer 2010; 126:2025-35. [PMID: 19739078 DOI: 10.1002/ijc.24885] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The development of multidrug resistance (MDR) is a major problem during cancer treatment. Drug efflux via ATP-binding cassette (ABC) transporters is the main mechanism responsible for resistance to chemotherapeutics. We have recently observed that statins enhance susceptibility to doxorubicin-induced apoptosis in human rhabdomyosarcoma cells, which is now also observed in human SH-SY5Y neuroblastoma cells. We have therefore investigated the ABC transporter activity to confirm a possible inhibition by statins in SH-SY5Y cells. Indeed, simvastatin directly inhibited dye transport at equimolar concentrations of the ABC transporter inhibitor, verapamil. Making use of the fluorescence behavior of doxorubicin the accumulation of anthracycline was monitored in real-time confocal microscopy. The intracellular doxorubicin accumulation was immediately enhanced by statins in SH-SY5Y cells and also in a MYCN-amplified neuroblastoma cell line STA-NB-10. The heavily glycosylated P-glycoprotein (ABCB1, P-gp) transporter appeared as a 180-and 140-kDa species. Atorvastatin and simvastatin reduced the 180-kDa form of P-gp, but not verapamil. Thereby the fully glycosylated species is shifted to the core glycosylated species (140 kDa), which was only seen at statin exposure times longer than 24 hr. The functional importance of glycosylation of the transporter was highlighted by exogenous application of N-glycosidase F, which was sufficient to enhance doxorubicin accumulation. Hence, these novel findings of statins' dual impact on P-gp have clinical implications. The enhanced intracellular accumulation of chemotherapeutics or other ABC transporter substrates in the presence of statins may represent a novel concept to overcome MDR in cancer therapy and improve drug safety.
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Affiliation(s)
- Evelyn Sieczkowski
- Institute of Pharmacology, Center of Biomolecular Medicine and Pharmacology, Medical University of Vienna, Vienna, Austria
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16
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Barick KC, Nigam S, Bahadur D. Nanoscale assembly of mesoporous ZnO: A potential drug carrier. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00022a] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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17
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Osowski A, Pietrzak M, Wieczorek Z, Wieczorek J. Natural compounds in the human diet and their ability to bind mutagens prevents DNA-mutagen intercalation. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2010; 73:1141-1149. [PMID: 20706936 DOI: 10.1080/15287394.2010.491044] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Human diet may contain many mutagenic or carcinogenic aromatic compounds as well as some beneficial physiologically active dietary components, especially plant food phytochemicals, which act as mutagenesis or carcinogenesis inhibitors. This study compared the binding properties of natural compounds in the human diet (caffeine, theophylline, theobromine, and resveratrol) with a water-soluble derivative of chlorophyll to bind to acridine orange, a known mutagen. An analysis was conducted to determine which substances were effective binding agents and may thus be useful in prevention of chemical-induced mutagenesis and carcinogenesis. Data indicated that in order to bind 50% of the mutagen in a complex, less than twice the concentration of chlorophyllin was needed, the resveratrol concentration was 20-fold higher, while a 1000-fold or even 10,000-fold excess of xanthines were required to bind acridine orange.
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Affiliation(s)
- Adam Osowski
- Department of Physics and Biophysics, University of Warmia and Mazury, Olsztyn, Poland
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Attenuation of acridine mutagen ICR-191--DNA interactions and DNA damage by the mutagen interceptor chlorophyllin. Biophys Chem 2008; 135:69-75. [PMID: 18423964 DOI: 10.1016/j.bpc.2008.03.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 03/18/2008] [Accepted: 03/18/2008] [Indexed: 11/24/2022]
Abstract
We have investigated the ability of chlorophyllin (CHL) to interact with acridine mutagen ICR-191 (2-methoxy-6-chloro-9-(3-(2-chloroethyl)aminopropylamino)acridine) and also its ability to decrease binding of ICR-191 to DNA in a simple three-component competition system: CHL-ICR-DNA. Our data indicate a strong association of ICR-191 with CHL, stronger even than the association of ICR-191 with DNA. Calculations based on the measured affinity data show that a two- to three-fold excess of CHL reduces by about two-fold the concentration of the mutagen-DNA complex. We also exposed human leukemic HL-60 cells to ICR-191 in the absence and presence of CHL and measured the mutagen-induced DNA damage. The extent of DNA damage was assessed by analysis of histone H2AX phosphorylation. While ICR-191 induced significant increase in expression of phosphorylated H2AX (gammaH2AX), particularly in DNA replicating cells, this increase was totally abolished in the cells treated with ICR-191 in the presence of CHL.
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19
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Quantitation of the molecular mechanisms of biological synergism in a mixture of DNA-acting aromatic drugs. Biophys Chem 2008; 132:148-58. [DOI: 10.1016/j.bpc.2007.11.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2007] [Revised: 11/04/2007] [Accepted: 11/05/2007] [Indexed: 01/01/2023]
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20
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Munnier E, Tewes F, Cohen-Jonathan S, Linassier C, Douziech-Eyrolles L, Marchais H, Soucé M, Hervé K, Dubois P, Chourpa I. On the interaction of doxorubicin with oleate ions: fluorescence spectroscopy and liquid-liquid extraction study. Chem Pharm Bull (Tokyo) 2007; 55:1006-10. [PMID: 17603190 PMCID: PMC4712348 DOI: 10.1248/cpb.55.1006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Increase of lipophilicity of cationic doxorubicin (DOX) by its association with a fatty acid ion is of interest for pharmaceutical formulations and could have an impact on the drug delivery into cancer cells. On the basis of spectroscopic analysis of intrinsic DOX fluorescence, this study provides an experimental evidence of DOX-oleate interactions as function of ion/drug molar ratio (R) and pH. An electrostatic attraction to oleates is dominant for the cationic form of DOX (pH 6.5) and a hydrophobic interaction is characteristic of the molecular form of DOX (pH 8.6). A high content of sodium oleate vesicles ([oleate]>/=0.2 mM, R>/=20) limits the electrostatic and hydrophobic interactions at pH 6.5 while favoring the hydrophobic interactions at pH 8.6. The influence of these interactions on the lipophilicity of the cationic form of DOX is analyzed by measuring the apparent partition coefficient (aqueous buffer pH 6.5/methylene chloride). The results show a lipophilicity gain for the cationic form of DOX in presence of 10 : 1 ion/drug molar ratio, while no lipophilicity increase is observed at 50 : 1 molar ratio.
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Affiliation(s)
- Emilie Munnier
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
- Service d'Oncologie Médicale
Hôpital BretonneauCHRU Tours2 Boulevard Tonnellé 37000 Tours
| | - Frédéric Tewes
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
- * Correspondence should be addressed to Frédéric Tewes
| | - Simone Cohen-Jonathan
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
| | - Claude Linassier
- Service d'Oncologie Médicale
Hôpital BretonneauCHRU Tours2 Boulevard Tonnellé 37000 Tours
| | - Laurence Douziech-Eyrolles
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
| | - Hervé Marchais
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
| | - Martin Soucé
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
| | - Katel Hervé
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
| | - Pierre Dubois
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
| | - Igor Chourpa
- IF Imagerie Fonctionnelle
Centre National de la Recherche ScientifiqueInstitut National de la Recherche Agronomique (INRA)INSERMEFSCHRU Tours2 Boulevard Tonnellé 37044 Tours cedex 1
- Focalisation Magnétique d'Agents Anticancéreux
IFR135
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21
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Pietrzak M, Wieczorek Z, Wieczorek J, Darzynkiewicz Z. The "interceptor" properties of chlorophyllin measured within the three-component system: intercalator-DNA-chlorophyllin. Biophys Chem 2006; 123:11-9. [PMID: 16650923 PMCID: PMC3488280 DOI: 10.1016/j.bpc.2006.03.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2006] [Revised: 03/28/2006] [Accepted: 03/30/2006] [Indexed: 10/24/2022]
Abstract
In aqueous solutions, in the presence of double-stranded DNA, chlorophyllin (CHL) forms complexes with each of the three DNA intercalators: acridine orange (AO), quinacrine mustard (QM), and doxorubicin (DOX). The evidence for these interactions was obtained by measurement changes in the absorption and fluorescence spectra of the mixtures containing DNA and intercalators during titration with CHL. A model of simple competition between DNA and CHL for the intercalator was used to define the measured interactions. The concentrations of the complexes estimated based on this model were consistent with the concentrations obtained by actual measurement of the absorption spectra. The present data provide further support for the role of chlorophyllin as an "interceptor" that may neutralize biological activity of aromatic compounds including mutagens and antitumor drugs.
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Affiliation(s)
- Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
- Corresponding author: Tel./fax: +48 89 523 45 47. (Z. Wieczorek)
| | - Jolanta Wieczorek
- Department of Commodities and Food Research, University of Warmia and Mazury in Olsztyn, Cieszyński Square 1, 10-726 Olsztyn, Poland
| | - Zbigniew Darzynkiewicz
- Brander Cancer Research Institute at New York Medical College, Hawthorne, NY, 10532, USA
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22
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Kapiotis S, Hermann M, Exner M, Laggner H, Gmeiner BMK. Copper- and magnesium protoporphyrin complexes inhibit oxidative modification of LDL induced by hemin, transition metal ions and tyrosyl radicals. Free Radic Res 2006; 39:1193-202. [PMID: 16298745 DOI: 10.1080/10715760500138981] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The oxidative modification of LDL may play an important role in the early events of atherogenesis. Thus the identification of antioxidative compounds may be of therapeutic and prophylactic importance regarding cardiovascular disease. Copper-chlorophyllin (Cu-CHL), a Cu(2+)-protoporphyrin IX complex, has been reported to inhibit lipid oxidation in biological membranes and liposomes. Hemin (Fe(3+)-protoporphyrin IX) has been shown to bind to LDL thereby inducing lipid peroxidation. As Cu-CHL has a similar structure as hemin, one may assume that Cu-CHL may compete with the hemin action on LDL. Therefore, in the present study Cu-CHL and the related compound magnesium-chlorophyllin (Mg-CHL) were examined in their ability to inhibit LDL oxidation initiated by hemin and other LDL oxidizing systems. LDL oxidation by hemin in presence of H(2)O(2) was strongly inhibited by both CHLs. Both chlorophyllins were also capable of effectively inhibiting LDL oxidation initiated by transition metal ions (Cu(2+)), human umbilical vein endothelial cells (HUVEC) and tyrosyl radicals generated by myeloperoxidase (MPO) in presence of H(2)O(2) and tyrosine. Cu- and Mg-CHL showed radical scavenging ability as demonstrated by the diphenylpicrylhydracylradical (DPPH)-radical assay and estimation of phenoxyl radical generated diphenyl (dityrosine) formation. As assessed by ultracentrifugation the chlorophyllins were found to bind to LDL (and HDL) in serum. The present study shows that copper chlorophyllin (Cu-CHL) and its magnesium analog could act as potent antagonists of atherogenic LDL modification induced by various oxidative stimuli. As inhibitory effects of the CHLs were found at concentrations as low as 1 mumol/l, which can be achieved in humans, the results may be physiologically/therapeutically relevant.
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Affiliation(s)
- Stylianos Kapiotis
- Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Vienna, Austria
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23
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Davies DB, Evstigneev MP, Veselkov DA, Veselkov AN. Hetero-association of anticancer antibiotics in aqueous solution: NMR and molecular mechanics analysis. Biophys Chem 2005; 117:111-8. [PMID: 15921843 DOI: 10.1016/j.bpc.2005.03.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2004] [Revised: 03/30/2005] [Accepted: 03/31/2005] [Indexed: 11/19/2022]
Abstract
In order to investigate the effect on combinations of aromatic antibiotics used in chemotherapy, the hetero-association of the antitumour antibiotics actinomycin D (AMD) with daunomycin (DAU) or novatrone (NOV) has been studied by the methods of 1D- and 2D 500 MHz 1H-NMR spectroscopy and molecular mechanics calculations. The experimental concentration and temperature dependences of the proton chemical shifts of mixtures of the aromatic drugs have been analyzed in terms of a modified statistical-thermodynamical model of hetero-association to give the equilibrium reaction constants, the thermodynamical parameters (deltaH, deltaS) of hetero-association of AMD with DAU or NOV and the limiting values of proton chemical shifts of the molecules in the hetero-complexes. The most favorable averaged structures of the 1:1 DAU-AMD and NOV-AMD hetero-association complexes have been determined using both the limiting values of proton chemical shifts of the molecules and molecular mechanics methods (X-PLOR software). The results show that intermolecular complexes between DAU-AMD and NOV-AMD are mainly stabilized by stacking interactions of the aromatic chromophores, although the DAU-AMD hetero-complex has additional stabilization, which may be explained by an intermolecular hydrogen bond between a carbonyl group of ring C of DAU and the NH group of D-Val of the pentapeptide side chain ring of AMD. The relative content of each type of molecular complex in the mixed solution has been calculated at different values of the ratio (r) of the initial concentrations of DAU and AMD. It is found that the contributions of hetero-complexes to the general equilibrium in solution are predominant at quite different values of r, viz. at r>12 for AMD with NOV and at r>2 for AMD with DAU, compared to r>0.3 for the DAU-NOV system observed previously. It is concluded that anticancer drugs have quite different affinities for formation of hetero-complexes with other aromatic antibiotics in aqueous solution, which may need to be taken into consideration for their use in combination chemotherapy.
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Affiliation(s)
- D B Davies
- School of Biological and Chemical Sciences, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK.
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24
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de Vogel J, Jonker-Termont DSML, Katan MB, van der Meer R. Natural chlorophyll but not chlorophyllin prevents heme-induced cytotoxic and hyperproliferative effects in rat colon. J Nutr 2005; 135:1995-2000. [PMID: 16046728 DOI: 10.1093/jn/135.8.1995] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Diets high in red meat and low in green vegetables are associated with an increased risk of colon cancer. In rats, dietary heme, mimicking red meat, increases colonic cytotoxicity and proliferation of the colonocytes, whereas addition of chlorophyll from green vegetables inhibits these heme-induced effects. Chlorophyllin is a water-soluble hydrolysis product of chlorophyll that inhibits the toxicity of many planar aromatic compounds. The present study investigated whether chlorophyllins could inhibit the heme-induced luminal cytotoxicity and colonic hyperproliferation as natural chlorophyll does. Rats were fed a purified control diet, the control diet supplemented with heme, or a heme diet with 1.2 mmol/kg diet of chlorophyllin, copper chlorophyllin, or natural chlorophyll for 14 d (n = 8/group). The cytotoxicity of fecal water was determined with an erythrocyte bioassay and colonic epithelial cell proliferation was quantified in vivo by [methyl-(3)H]thymidine incorporation into newly synthesized DNA. Exfoliation of colonocytes was measured as the amount of rat DNA in feces using quantitative PCR analysis. Heme caused a >50-fold increase in the cytotoxicity of the fecal water, a nearly 100% increase in proliferation, and almost total inhibition of exfoliation of the colonocytes. Furthermore, the addition of heme increased TBARS in fecal water. Chlorophyll, but not the chlorophyllins, completely prevented these heme-induced effects. In conclusion, inhibition of the heme-induced colonic cytotoxicity and epithelial cell turnover is specific for natural chlorophyll and cannot be mimicked by water-soluble chlorophyllins.
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Affiliation(s)
- Johan de Vogel
- Wageningen Centre for Food Sciences (WCFS), Nutrition and Health Programme, The Netherlands
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