1
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Bacalum M, Radu M, Osella S, Knippenberg S, Ameloot M. Generalized polarization and time-resolved fluorescence provide evidence for different populations of Laurdan in lipid vesicles. J Photochem Photobiol B 2024; 250:112833. [PMID: 38141326 DOI: 10.1016/j.jphotobiol.2023.112833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/29/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
The solvatochromic dye Laurdan is widely used in sensing the lipid packing of both model and biological membranes. The fluorescence emission maximum shifts from about 440 nm (blue channel) in condensed membranes (So) to about 490 nm (green channel) in the liquid-crystalline phase (Lα). Although the fluorescence intensity based generalized polarization (GP) is widely used to characterize lipid membranes, the fluorescence lifetime of Laurdan, in the blue and the green channel, is less used for that purpose. Here we explore the correlation between GP and fluorescence lifetimes by spectroscopic measurements on the So and Lα phases of large unilamellar vesicles of DMPC and DPPC. A positive correlation between GP and the lifetimes is observed in each of the optical channels for the two lipid phases. Microfluorimetric determinations on giant unilamellar vesicles of DPPC and DOPC at room temperature are performed under linearly polarized two-photon excitation to disentangle possible subpopulations of Laurdan at a scale below the optical resolution. Fluorescence intensities, GP and fluorescence lifetimes depend on the angle between the orientation of the linear polarization of the excitation light and the local normal to the membrane of the optical cross-section. This angular variation depends on the lipid phase and the emission channel. GP and fluorescence intensities in the blue and green channel in So and in the blue channel in Lα exhibit a minimum near 90o. Surprisingly, the intensity in the green channel in Lα reaches a maximum near 90o. The fluorescence lifetimes in the two optical channels also reach a pronounced minimum near 90o in So and Lα, apart from the lifetime in the blue channel in Lα where the lifetime is short with minimal angular variation. To our knowledge, these experimental observations are the first to demonstrate the existence of a bent conformation of Laurdan in lipid membranes, as previously suggested by molecular dynamics calculations.
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Affiliation(s)
- Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului, 30, Măgurele 077125, Romania
| | - Mihai Radu
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului, 30, Măgurele 077125, Romania
| | - Silvio Osella
- Chemical and Biological Systems Simulation Lab, Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland
| | - Stefan Knippenberg
- Biomedical Research Institute, Hasselt University, Agoralaan Bldg. C, 3590 Diepenbeek, Belgium; Theory Lab, Hasselt University, Agoralaan Bldg. D, 3590 Diepenbeek, Belgium
| | - Marcel Ameloot
- Biomedical Research Institute, Hasselt University, Agoralaan Bldg. C, 3590 Diepenbeek, Belgium.
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2
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Plocon C, Evanghelidis A, Enculescu M, Isopencu G, Oprea O, Bacalum M, Raileanu M, Jinga S, Busuioc C. Development and Characterization of Electrospun Composites Built on Polycaprolactone and Cerium-Containing Phases. Int J Mol Sci 2023; 24:14201. [PMID: 37762504 PMCID: PMC10532413 DOI: 10.3390/ijms241814201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/13/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
The current study reports on the fabrication of composite scaffolds based on polycaprolactone (PCL) and cerium (Ce)-containing powders, followed by their characterization from compositional, structural, morphological, optical and biological points of view. First, CeO2, Ce-doped calcium phosphates and Ce-substituted bioglass were synthesized by wet-chemistry methods (precipitation/coprecipitation and sol-gel) and subsequently loaded on PCL fibres processed by electrospinning. The powders were proven to be nanometric or micrometric, while the investigation of their phase composition showed that Ce was present as a dopant within the crystal lattice of the obtained calcium phosphates or as crystalline domains inside the glassy matrix. The best bioactivity was attained in the case of Ce-containing bioglass, while the most pronounced antibacterial effect was visible for Ce-doped calcium phosphates calcined at a lower temperature. The scaffolds were composed of either dimensionally homogeneous fibres or mixtures of fibres with a wide size distribution and beads of different shapes. In most cases, the increase in polymer concentration in the precursor solution ensured the achievement of more ordered fibre mats. The immersion in SBF for 28 days triggered an incipient degradation of PCL, evidenced mostly through cracks and gaps. In terms of biological properties, the composite scaffolds displayed a very good biocompatibility when tested with human osteoblast cells, with a superior response for the samples consisting of the polymer and Ce-doped calcium phosphates.
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Affiliation(s)
- Cristiana Plocon
- University Politehnica of Bucharest, RO-060042 Bucharest, Romania; (C.P.); (G.I.); (O.O.); (S.J.)
| | | | - Monica Enculescu
- National Institute for Materials Physics, RO-077125 Magurele, Romania; (A.E.); (M.E.)
| | - Gabriela Isopencu
- University Politehnica of Bucharest, RO-060042 Bucharest, Romania; (C.P.); (G.I.); (O.O.); (S.J.)
| | - Ovidiu Oprea
- University Politehnica of Bucharest, RO-060042 Bucharest, Romania; (C.P.); (G.I.); (O.O.); (S.J.)
| | - Mihaela Bacalum
- National Institute of Physics and Nuclear Engineering, RO-077125 Magurele, Romania; (M.B.); (M.R.)
| | - Mina Raileanu
- National Institute of Physics and Nuclear Engineering, RO-077125 Magurele, Romania; (M.B.); (M.R.)
| | - Sorin Jinga
- University Politehnica of Bucharest, RO-060042 Bucharest, Romania; (C.P.); (G.I.); (O.O.); (S.J.)
| | - Cristina Busuioc
- University Politehnica of Bucharest, RO-060042 Bucharest, Romania; (C.P.); (G.I.); (O.O.); (S.J.)
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Toader G, Podaru AI, Diacon A, Rusen E, Mocanu A, Brincoveanu O, Alexandru M, Zorila FL, Bacalum M, Albota F, Gavrila AM, Trica B, Rotariu T, Ionita M, Istrate M. Nanocomposite Hydrogel Films Based on Sequential Interpenetrating Polymeric Networks as Drug Delivery Platforms. Polymers (Basel) 2023; 15:3176. [PMID: 37571071 PMCID: PMC10420953 DOI: 10.3390/polym15153176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/21/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023] Open
Abstract
In this study, novel materials have been obtained via a dual covalent and ionic crosslinking strategies, leading to the formation of a fully interpenetrated polymeric network with remarkable mechanical performances as drug delivery platforms for dermal patches. The polymeric network was obtained by the free-radical photopolymerization of N-vinylpyrrolidone using tri(ethylene glycol) divinyl ether as crosslinker in the presence of sodium alginate (1%, weight%). The ionic crosslinking was achieved by the addition of Zn2+, ions which were coordinated by the alginate chains. Bentonite nanoclay was incorporated in hydrogel formulations to capitalize on its mechanical reinforcement and adsorptive capacity. TiO2 and ZnO nanoparticles were also included in two of the samples to evaluate their influence on the morphology, mechanical properties and/or the antimicrobial activity of the hydrogels. The double-crosslinked nanocomposite hydrogels presented a good tensile resistance (1.5 MPa at 70% strain) and compression resistance (12.5 MPa at a strain of 70%). Nafcillin was loaded into nanocomposite hydrogel films with a loading efficiency of up to 30%. The drug release characteristics were evaluated, and the profile was fitted by mathematical models that describe the physical processes taking place during the drug transfer from the polymer to a PBS (phosphate-buffered saline) solution. Depending on the design of the polymeric network and the nanofillers included, it was demonstrated that the nafcillin loaded into the nanocomposite hydrogel films ensured a high to moderate activity against S. aureus and S. pyogenes and no activity against E. coli. Furthermore, it was demonstrated that the presence of zinc ions in these polymeric matrices can be correlated with the inactivation of E. coli.
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Affiliation(s)
- Gabriela Toader
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.I.P.); (T.R.)
| | - Alice Ionela Podaru
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.I.P.); (T.R.)
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gheorghe Polizu Street, 011061 Bucharest, Romania;
| | - Aurel Diacon
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.I.P.); (T.R.)
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gheorghe Polizu Street, 011061 Bucharest, Romania;
| | - Edina Rusen
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gheorghe Polizu Street, 011061 Bucharest, Romania;
| | - Alexandra Mocanu
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gheorghe Polizu Street, 011061 Bucharest, Romania;
- National Institute for Research and Development in Microtechnologies—IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania;
| | - Oana Brincoveanu
- National Institute for Research and Development in Microtechnologies—IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania;
- Research Institute of the University of Bucharest, University of Bucharest, Soseaua Panduri, nr. 90, Sector 5, 050663 Bucharest, Romania
| | - Mioara Alexandru
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania; (M.A.); (F.L.Z.); (M.B.); (F.A.)
| | - Florina Lucica Zorila
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania; (M.A.); (F.L.Z.); (M.B.); (F.A.)
- Department of Genetics, Faculty of Biology, University of Bucharest, 91-95 Splaiul Indepententei, 050095 Bucharest, Romania
| | - Mihaela Bacalum
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania; (M.A.); (F.L.Z.); (M.B.); (F.A.)
| | - Florin Albota
- Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania; (M.A.); (F.L.Z.); (M.B.); (F.A.)
| | - Ana Mihaela Gavrila
- National Institute of Research and Development for Chemistry and Petrochemistry, 202 Splaiul Independentei, 060041 Bucharest, Romania; (A.M.G.); (B.T.)
| | - Bogdan Trica
- National Institute of Research and Development for Chemistry and Petrochemistry, 202 Splaiul Independentei, 060041 Bucharest, Romania; (A.M.G.); (B.T.)
| | - Traian Rotariu
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.I.P.); (T.R.)
| | - Mariana Ionita
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania;
- Advanced Polymer Materials Group, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania
- eBio-Hub Research Centre, University Politehnica of Bucharest-Campus, Iuliu Maniu 6, 061344 Bucharest, Romania
| | - Marcel Istrate
- S.C. Stimpex S.A., 46-48 Nicolae Teclu Street, 032368 Bucharest, Romania;
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Răileanu M, Bacalum M. Cancer Wars: Revenge of the AMPs (Antimicrobial Peptides), a New Strategy against Colorectal Cancer. Toxins (Basel) 2023; 15:459. [PMID: 37505728 PMCID: PMC10467133 DOI: 10.3390/toxins15070459] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/08/2023] [Accepted: 07/12/2023] [Indexed: 07/29/2023] Open
Abstract
Cancer is a multifaceted health issue that affects people globally and it is considered one of the leading causes of death with a high percentage of victims worldwide. In recent years, research studies have uncovered great advances in cancer diagnosis and treatment. But, there are still major drawbacks of the conventional therapies used including severe side effects, toxicity, and drug resistance. That is why it is critical to develop new drugs with advantages like low cytotoxicity and no treatment resistance to the cancer cells. Antimicrobial peptides (AMPs) have recently attracted attention as a novel therapeutic strategy for the treatment of various cancers, targeting tumor cells with less toxicity to normal tissues. The aim of the study was to discover alternate treatments that do not lead to cancer resistance and have fewer side effects. Here, we report the effects induced by several AMPs, Melittin, Cecropin A, and a Cecropin A-Melittin hybrid, against two human colorectal cancer-derived spheroids. To study the effects of the peptides, cell viability was investigated using MTT, LDH, and ATP assays. Furthermore, cellular senescence and cell cycle were investigated. We found that using different concentrations of these peptides affected the spheroids, their structure being highly compromised by reducing cell viability, and the increase in ATP and LDH levels. Also, the cells are arrested in the G2/M phase leading to an increase in senescent cells. We show that Melittin and the hybrid are most effective against the 3D colorectal cancer cells compared to Cecropin A.
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Affiliation(s)
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Magurele, Romania;
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Raileanu M, Borlan R, Campu A, Janosi L, Turcu I, Focsan M, Bacalum M. No country for old antibiotics! Antimicrobial peptides (AMPs) as next-generation treatment for skin and soft tissue infection. Int J Pharm 2023:123169. [PMID: 37356506 DOI: 10.1016/j.ijpharm.2023.123169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 06/27/2023]
Abstract
In recent years, the unprecedented rise of bacterial antibiotic resistance together with the lack of adequate therapies have made the treatment of skin infections and chronic wounds challenging, urging the scientific community to focus on the development of new and more efficient treatment strategies. In this context, there is a growing interest in the use of natural molecules with antimicrobial features, capable of supporting wound healing i.e., antimicrobial peptides (AMPs), for the treatment of skin and soft tissue infections. In this review, we give a short overview of the bacterial skin infections as well as some of the classic treatments used for topical application. We then summarize the AMPs classes, stressing the importance of the appropriate selection of the peptides based on their characteristics and physicochemical properties in order to maximize the antibacterial efficacy of the therapeutic systems against multi-drug resistant pathogens. Additionally, the present paper provides a comprehensive and rigorous assessment of the latest clinical trials investigating the efficacy of AMPs in the treatment of skin and soft tissue infections, highlighting the relevant outcomes. Seeking to obtain novel and improved compounds with synergistic activity, while also decreasing some of the known side effects of AMPs, we present two employed strategies using AMPs: (i) AMPs-conjugated nanosystems for systemic and topical drug delivery systems and (ii) antibiotics-peptide conjugates as a strategy to overcome antibiotics resistance. Finally, an important property of some of the AMPs used in wound treatment is highlighted: their ability to help in wound healing by generally promoting cell proliferation and migration, and in some cases re-epithelialization and angiogenesis among others. Thus, as the pursuit of improvement is an ongoing effort, this work presents the advances made in the treatment of skin and soft tissue infections along with their advantages and limitations, while the still remaining challenges are addressed by providing future prospects and strategies to overcome them.
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Affiliation(s)
- Mina Raileanu
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, Măgurele 077125, Romania
| | - Raluca Borlan
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurian No. 42, 400271 Cluj-Napoca, Romania
| | - Andreea Campu
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurian No. 42, 400271 Cluj-Napoca, Romania
| | - Lorant Janosi
- Molecular and Biomolecular Physics Department, National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293 Cluj-Napoca, Romania
| | - Ioan Turcu
- Molecular and Biomolecular Physics Department, National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293 Cluj-Napoca, Romania
| | - Monica Focsan
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurian No. 42, 400271 Cluj-Napoca, Romania.
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, Măgurele 077125, Romania.
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Tirsoaga A, Cojocaru V, Badea M, Badea IA, Rostas AM, Stoica R, Bacalum M, Chifiriuc MC, Olar R. Copper (II) Species with Improved Anti-Melanoma and Antibacterial Activity by Inclusion in β-Cyclodextrin. Int J Mol Sci 2023; 24:ijms24032688. [PMID: 36769008 PMCID: PMC9916925 DOI: 10.3390/ijms24032688] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
To improve their biological activity, complexes [Cu(bipy)(dmtp)2(OH2)](ClO4)2·dmtp (1) and [Cu(phen)(dmtp)2(OH2)](ClO4)2·dmtp (2) (bipy 2,2'-bipyridine, phen: 1,10-phenantroline, and dmtp: 5,7-dimethyl-1,2,4-triazolo [1,5-a]pyrimidine) were included in β-cyclodextrins (β-CD). During the inclusion, the co-crystalized dmtp molecule was lost, and UV-Vis spectra together with the docking studies indicated the synthesis of new materials with 1:1 and 1:2 molar ratios between complexes and β-CD. The association between Cu(II) compounds and β-CD has been proven by the identification of the components' patterns in the IR spectra and powder XRD diffractograms, while solid-state UV-Vis and EPR spectra analysis highlighted a slight modification of the square-pyramidal stereochemistry around Cu(II) in comparison with precursors. The inclusion species are stable in solution and exhibit the ability to scavenge or trap ROS species (O2·- and HO·) as indicated by the EPR experiments. Moreover, the two inclusion species exhibit anti-proliferative activity against murine melanoma B16 cells, which has been more significant for (2)@β-CD in comparison with (2). This behavior is associated with a cell cycle arrest in the G0/G1 phase. Compared with precursors, (1a)@β-CD and (2a)@β-CD exhibit 17 and 26 times more intense activity against planktonic Escherichia coli, respectively, while (2a)@β-CD is 3 times more active against the Staphylococcus aureus strain.
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Affiliation(s)
- Alina Tirsoaga
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania
| | - Victor Cojocaru
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania
| | - Mihaela Badea
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania
| | - Irinel Adriana Badea
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania
- Correspondence: (I.A.B.); (R.O.)
| | - Arpad Mihai Rostas
- National Institute for Research and Development of Isotopic and Molecular Technologies, Department of Physics of Nanostructured Systems, 67-103 Donat Str., 400293 Cluj-Napoca, Romania
| | - Roberta Stoica
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
| | - Mihaela Bacalum
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor Str., District 5, 060101 Bucharest, Romania
- Romanian Academy of Scientists, 54 Spl. Independenței Str., District 5, 050085 Bucharest, Romania
- Biological Sciences Division, The Romanian Academy, 25 Calea Victoriei, Sector 1, District 1, 010071 Bucharest, Romania
| | - Rodica Olar
- Department of Analytical and Physical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Regina Elisabeta Av., District 3, 030018 Bucharest, Romania
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., District 5, 050663 Bucharest, Romania
- Correspondence: (I.A.B.); (R.O.)
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Isopencu G, Deleanu I, Busuioc C, Oprea O, Surdu VA, Bacalum M, Stoica R, Stoica-Guzun A. Bacterial Cellulose-Carboxymethylcellulose Composite Loaded with Turmeric Extract for Antimicrobial Wound Dressing Applications. Int J Mol Sci 2023; 24:1719. [PMID: 36675235 PMCID: PMC9864671 DOI: 10.3390/ijms24021719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/02/2023] [Accepted: 01/11/2023] [Indexed: 01/19/2023] Open
Abstract
Bacterial cellulose (BC) is a biopolymer whose properties have been intensively studied, especially for biomedical applications. Since BC has no antimicrobial activity, it is necessary to use bioactive substances for developing wound healing applications. Another drawback of BC is the loss if its water retention capacity after dehydration. In order to overcome these problems, carboxymethyl cellulose (CMC) and turmeric extract (TE) were selected for the preparation of BC composites. Citric acid (CA) was used as the crosslinking agent. These composites were tested as potential antimicrobial wound dressing materials. TE-loaded BC-CMC composites were characterized in terms of their morphology, crystallinity, and thermal behavior. Swelling tests and curcumin-release kinetic analysis were also performed. All the composites tested had high swelling degrees, which is an advantage for the exudate adsorption from chronic wounds. The antibacterial potential of such composites was tested against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Candida albicans (C. albicans). The in vitro cytotoxicity toward L929 fibroblast cells was studied as well. The obtained results allow us to recommend these composites as good candidates for wound dressing applications.
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Affiliation(s)
- Gabriela Isopencu
- Department of Chemical and Biochemical Engineering, Faculty of Chemical Engineering and Biotechnologies, University “Politehnica” of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
| | - Iuliana Deleanu
- Department of Chemical and Biochemical Engineering, Faculty of Chemical Engineering and Biotechnologies, University “Politehnica” of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
| | - Cristina Busuioc
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University “Politehnica” of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
| | - Ovidiu Oprea
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, University “Politehnica” of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
- Academy of Romanian Scientists, 3 Ilfov Street, 050045 Bucharest, Romania
| | - Vasile-Adrian Surdu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University “Politehnica” of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Măgurele, Romania
| | - Roberta Stoica
- Department of Life and Environmental Physics, Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Măgurele, Romania
- Department of Anatomy, Animal Physiology and Biophysics, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei Street, 050095 Bucharest, Romania
| | - Anicuţa Stoica-Guzun
- Department of Chemical and Biochemical Engineering, Faculty of Chemical Engineering and Biotechnologies, University “Politehnica” of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
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8
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Răileanu M, Straticiuc M, Iancu DA, Andrei RF, Radu M, Bacalum M. Proton irradiation induced reactive oxygen species promote morphological and functional changes in HepG2 cells. J Struct Biol 2022; 214:107919. [PMID: 36356881 DOI: 10.1016/j.jsb.2022.107919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022]
Abstract
The increased use of proton therapy has led to the need of better understanding the cellular mechanisms involved. The aim of this study was to investigate the effects induced by the accelerated proton beam in hepatocarcinoma cells. An existing facility in IFIN-HH, a 3 MV Tandetron™ accelerator, was used to irradiate HepG2 human hepatocarcinoma cells with doses between 0 and 3 Gy. Colony formation was used to assess the influence of radiation on cell long-term replication. Also, the changes induced at the mitochondrial level were shown by increased ROS and ATP levels as well as a decrease in the mitochondrial membrane potential. An increased dose has induced DNA damages and G2/M cell cycle arrest which leads to caspase 3/7 mediated apoptosis and senescence induction. Finally, the morphological and ultrastructural changes were observed at the membrane level and the nucleus of the irradiated cells. Thus, proton irradiation induces both morphological and functional changes in HepG2 cells.
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Affiliation(s)
- Mina Răileanu
- University of Bucharest, Faculty of Physics, Atomistilor 405, Măgurele, Romania; Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, Reactorului 30, Măgurele, Romania
| | - Mihai Straticiuc
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Applied Nuclear Physics, Reactorului 30, Măgurele, Romania
| | - Decebal-Alexandru Iancu
- University of Bucharest, Faculty of Physics, Atomistilor 405, Măgurele, Romania; Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Applied Nuclear Physics, Reactorului 30, Măgurele, Romania
| | - Radu-Florin Andrei
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Applied Nuclear Physics, Reactorului 30, Măgurele, Romania; University of POLITEHNICA of Bucharest, Faculty of Applied Sciences, Splaiul Independentei 313, Romania
| | - Mihai Radu
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, Reactorului 30, Măgurele, Romania
| | - Mihaela Bacalum
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, Reactorului 30, Măgurele, Romania.
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9
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Busuioc C, Alecu AE, Costea CC, Beregoi M, Bacalum M, Raileanu M, Jinga SI, Deleanu IM. Composite Fibers Based on Polycaprolactone and Calcium Magnesium Silicate Powders for Tissue Engineering Applications. Polymers (Basel) 2022; 14:4611. [PMID: 36365605 PMCID: PMC9656997 DOI: 10.3390/polym14214611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/25/2022] [Accepted: 10/27/2022] [Indexed: 07/30/2023] Open
Abstract
The present work reports the synthesis and characterization of polycaprolactone fibers loaded with particulate calcium magnesium silicates, to form composite materials with bioresorbable and bioactive properties. The inorganic powders were achieved through a sol-gel method, starting from the compositions of diopside, akermanite, and merwinite, three mineral phases with suitable features for the field of hard tissue engineering. The fibrous composites were fabricated by electrospinning polymeric solutions with a content of 16% polycaprolactone and 5 or 10% inorganic powder. The physico-chemical evaluation from compositional and morphological points of view was followed by the biological assessment of powder bioactivity and scaffold biocompatibility. SEM investigation highlighted a significant reduction in fiber diameter, from around 3 μm to less than 100 nm after the loading stage, while EDX and FTIR spectra confirmed the existence of embedded mineral entities. The silicate phases were found be highly bioactive after 4 weeks of immersion in SBF, enriching the potential of the polymeric host that provides only biocompatibility and bioresorbability. Moreover, the cellular tests indicated a slight decrease in cell viability over the short-term, a compromise that can be accepted if the overall benefits of such multifunctional composites are considered.
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Affiliation(s)
- Cristina Busuioc
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, RO-060042 Bucharest, Romania
| | - Andrada-Elena Alecu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, RO-060042 Bucharest, Romania
| | - Claudiu-Constantin Costea
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, RO-060042 Bucharest, Romania
| | - Mihaela Beregoi
- National Institute of Materials Physics, RO-077125 Magurele, Romania
| | - Mihaela Bacalum
- National Institute of Physics and Nuclear Engineering, RO-077125 Magurele, Romania
| | - Mina Raileanu
- National Institute of Physics and Nuclear Engineering, RO-077125 Magurele, Romania
| | - Sorin-Ion Jinga
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, RO-060042 Bucharest, Romania
| | - Iuliana-Mihaela Deleanu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, RO-060042 Bucharest, Romania
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10
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Olar R, Maxim C, Badea M, Bacalum M, Raileanu M, Avram S, Korošin NČ, Burlanescu T, Rostas AM. Antiproliferative Copper(II) Complexes Bearing Mixed Chelating Ligands: Structural Characterization, ROS Scavenging, In Silico Studies, and Anti-Melanoma Activity. Pharmaceutics 2022; 14:pharmaceutics14081692. [PMID: 36015318 PMCID: PMC9416163 DOI: 10.3390/pharmaceutics14081692] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/29/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022] Open
Abstract
Melanoma is a skin cancer characterized by rapid growth and spread for which current therapies produce both resistance and increased risk of infection. To develop new anti-melanoma biocompatible species, the series of complexes Cu(N-N)(bzac)(X)⋅nH2O (N-N: 1,10-phenanthroline/2,2′-bipyridine, Hbzac: 1-phenyl-1,3-butanedione, X: NO3/ClO4, and n = 0, 1) was studied. Single-crystal X-ray diffraction revealed a mononuclear structure for all complexes. The ability of the complexes to scavenge or trap reactive oxygen species such as O2⋅− and HO⋅ was proved by EPR spectroscopy experiments. All complexes inhibited B16 murine melanoma cells in a dose-dependent and nanomolar range, but the complexes with 1,10-phenanthroline were more active. Moreover, comparative activity on B16 and healthy BJ cells revealed a therapeutic index of 1.27–2.24. Bioinformatic methods were used to calculate the drug-likeness, pharmacokinetic, pharmacogenomic, and pharmacodynamic profiles of the compounds. The results showed that all compounds exhibit drug-likeness features, as well as promising absorption, distribution, metabolism, and excretion (ADME) properties, and no toxicity. The pharmacodynamics results showed that the neutral species appear to be good candidates for antitumor molecular targets (Tyrosyl-DNA phosphodiesterase 1, DNA-(apurinic or apyrimidinic site) lyase or Kruppel-like factor 5). Furthermore, the pharmacogenomic results showed a good affinity of the copper(II) complexes for the human cytochrome. These results recommend complexes bearing 1,10-phenanthroline as good candidates for developing drugs to melanoma alternative treatment.
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Affiliation(s)
- Rodica Olar
- Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania
- Correspondence: (R.O.); (S.A.)
| | - Catalin Maxim
- Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania
| | - Mihaela Badea
- Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania
| | - Mihaela Bacalum
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
| | - Mina Raileanu
- Horia Hulubei National Institute for Physics and Nuclear Engineering, Department of Life and Environmental Physics, 30 Reactorului Str., 077125 Magurele-Ilfov, Romania
- Faculty of Physics, Department of Electricity, Solid State and Biophysics, University of Bucharest, 405A Atomiștilor Str., 077125 Magurele-Ilfov, Romania
| | - Speranta Avram
- Faculty of Biology, Department of Anatomy, Animal Physiology and Biophysics, University of Bucharest, 91-95, Splaiul Independenței, 050095 Bucharest, Romania
- Correspondence: (R.O.); (S.A.)
| | - Nataša Čelan Korošin
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Teodora Burlanescu
- Laboratory of Optical Processes in Nanostructure Materials, National Institute of Materials Physics, 405A Atomiștilor Str., 077125 Magurele-Ilfov, Romania
| | - Arpad Mihai Rostas
- Laboratory of Atomic Structures and Defects in Advanced Materials, LASDAM, National Institute of Materials Physics, 405A Atomiștilor Str., 077125 Magurele-Ilfov, Romania
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11
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Raileanu M, Bacalum M, Enciu A, Iancu D, Andrei R, Straticiuc M, Radu M. DOSE-RATE MODULATE THE EVOLUTION OF TUMORAL CELLS IN CULTURE AFTER SINGLE DOSE IRRADIATION WITH LOW ENERGY PROTONS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01656-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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12
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Răileanu M, Lonetti B, Serpentini CL, Goudounèche D, Gibot L, Bacalum M. Encapsulation of a cationic antimicrobial peptide into self-assembled polyion complex nano-objects enhances its antitumor properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Ruta LL, Farcasanu IC, Bacalum M, Răileanu M, Rostas AM, Daniliuc C, Chifiriuc MC, Măruțescu L, Popa M, Badea M, Iorgulescu EE, Olar R. Biological Activity of Triazolopyrimidine Copper(II) Complexes Modulated by an Auxiliary N-N-Chelating Heterocycle Ligands. Molecules 2021; 26:6772. [PMID: 34833864 PMCID: PMC8620715 DOI: 10.3390/molecules26226772] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/20/2021] [Accepted: 11/05/2021] [Indexed: 01/31/2023] Open
Abstract
Novel complexes of type [Cu(N-N)(dmtp)2(OH2)](ClO4)2·dmtp ((1) N-N: 2,2'-bipyridine; (2) L: 1,10-phenantroline and dmtp: 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine) were designed in order to obtain biologically active compounds. Complexes were characterized as mononuclear species that crystallized in the space group P-1 of the triclinic system with a square pyramidal geometry around the copper (II). In addition to the antiproliferative effect on murine melanoma B16 cells, complex (1) exhibited low toxicity on normal BJ cells and did not affect membrane integrity. Complex (2) proved to be a more potent antimicrobial in comparison with (1), but both compounds were more active in comparison with dmtp-both against planktonic cells and biofilms. A stronger antimicrobial and antibiofilm effect was noticed against the Gram-positive strains, including methicillin-resistant Staphylococcus aureus (MRSA). Both electron paramagnetic resonance (EPR) and Saccharomyces cerevisiae studies indicated that the complexes were scavengers rather than reactive oxygen species promoters. Their DNA intercalating capacity was evidenced by modifications in both absorption and fluorescence spectra. Furthermore, both complexes exhibited nuclease-like activity, which increased in the presence of hydrogen peroxide.
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Affiliation(s)
- Lavinia L. Ruta
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Ileana C. Farcasanu
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Măgurele, Romania; (M.B.); (M.R.)
| | - Mina Răileanu
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului Str., 077125 Măgurele, Romania; (M.B.); (M.R.)
- Department of Electricity, Solid State and Biophysics, Faculty of Physics, University of Bucharest, 405A Atomiştilor Str., 077125 Măgurele, Romania
| | - Arpad Mihai Rostas
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, 405A Atomiştilor Str., 077125 Măgurele, Romania;
| | - Constantin Daniliuc
- Organisch-Chemisches Institute, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany;
| | - Mariana Carmen Chifiriuc
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 060101 Bucharest, Romania; (M.C.C.); (L.M.); (M.P.)
| | - Luminița Măruțescu
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 060101 Bucharest, Romania; (M.C.C.); (L.M.); (M.P.)
| | - Marcela Popa
- Department of Microbiology, Faculty of Biology, University of Bucharest, 1–3 Aleea Portocalelor Str., 060101 Bucharest, Romania; (M.C.C.); (L.M.); (M.P.)
| | - Mihaela Badea
- Department of Inorganic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Emilia Elena Iorgulescu
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
| | - Rodica Olar
- Department of Inorganic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania;
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Barbinta-Patrascu ME, Gorshkova Y, Ungureanu C, Badea N, Bokuchava G, Lazea-Stoyanova A, Bacalum M, Zhigunov A, Petrovic S. Characterization and Antitumoral Activity of Biohybrids Based on Turmeric and Silver/Silver Chloride Nanoparticles. Materials (Basel) 2021; 14:4726. [PMID: 34443248 PMCID: PMC8401137 DOI: 10.3390/ma14164726] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/14/2021] [Accepted: 08/19/2021] [Indexed: 11/16/2022]
Abstract
The phyto-development of nanomaterials is one of the main challenges for scientists today, as it offers unusual properties and multifunctionality. The originality of our paper lies in the study of new materials based on biomimicking lipid bilayers loaded with chlorophyll, chitosan, and turmeric-generated nano-silver/silver chloride particles. These materials showed a good free radical scavenging capacity between 76.25 and 93.26% (in vitro tested through chemiluminescence method) and a good antimicrobial activity against Enterococcus faecalis bacterium (IZ > 10 mm). The anticancer activity of our developed bio-based materials was investigated against two cancer cell lines (human colorectal adenocarcinoma cells HT-29, and human liver carcinoma cells HepG2) and compared to one healthy cell line (human fibroblast BJ cell line). Cell viability was evaluated for all prepared materials after a 24 h treatment and was used to select the biohybrid with the highest therapeutic index (TI); additionally, the hemolytic activity of the samples was also evaluated. Finally, we investigated the morphological changes induced by the developed materials against the cell lines studied. Biophysical studies on these materials were done by correlating UV-Vis and FTIR absorption spectroscopy, with XRD, SANS, and SAXS methods, and with information provided by microscopic techniques (AFM, SEM/EDS). In conclusion, these "green" developed hybrid systems are an important alternative in cancer treatment, and against health problems associated with drug-resistant infections.
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Affiliation(s)
- Marcela-Elisabeta Barbinta-Patrascu
- Department of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Bucharest-Măgurele, Romania;
| | - Yulia Gorshkova
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie, 6 Dubna, 141980 Moscow, Russia;
- Institute of Physics, Kazan Federal University, 16a Kremlyovskaya Street, 420008 Kazan, Russia
| | - Camelia Ungureanu
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, 1-7, Polizu Street, 011061 Bucharest, Romania;
| | - Nicoleta Badea
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, 1-7, Polizu Street, 011061 Bucharest, Romania;
| | - Gizo Bokuchava
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie, 6 Dubna, 141980 Moscow, Russia;
| | - Andrada Lazea-Stoyanova
- Low Temperature Plasma Department, National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, 077125 Ilfov, Romania;
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, “Horia Hulubei” National Institute of Physics and Nuclear Engineering, 077125 Măgurele, Romania;
| | - Alexander Zhigunov
- Institute of Macromolecular Chemistry AS CR, Heyrovskeho nam. 2, 162 06 Prague 6, Czech Republic;
| | - Sanja Petrovic
- Department of Chemical Technology, Faculty of Technology, University of Nis, Bulevar Oslobodjenja 124, 16000 Leskovac, Serbia;
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15
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Gorshkova Y, Barbinta-Patrascu ME, Bokuchava G, Badea N, Ungureanu C, Lazea-Stoyanova A, Răileanu M, Bacalum M, Turchenko V, Zhigunov A, Juszyńska-Gałązka E. Biological Performances of Plasmonic Biohybrids Based on Phyto-Silver/Silver Chloride Nanoparticles. Nanomaterials (Basel) 2021; 11:1811. [PMID: 34361197 PMCID: PMC8308221 DOI: 10.3390/nano11071811] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/05/2021] [Accepted: 07/08/2021] [Indexed: 12/26/2022]
Abstract
Silver/silver chloride nanoparticles (Ag/AgClNPs), with a mean size of 48.2 ± 9.5 nm and a zeta potential value of -31.1 ± 1.9 mV, obtained by the Green Chemistry approach from a mixture of nettle and grape extracts, were used as "building blocks" for the "green" development of plasmonic biohybrids containing biomimetic membranes and chitosan. The mechanism of biohybrid formation was elucidated by optical analyses (UV-vis absorption and emission fluorescence, FTIR, XRD, and SAXS) and microscopic techniques (AFM and SEM). The aforementioned novel materials showed a free radical scavenging capacity of 75% and excellent antimicrobial properties against Escherichia coli (IGZ = 45 mm) and Staphylococcus aureus (IGZ = 35 mm). The antiproliferative activity of biohybrids was highlighted by a therapeutic index value of 1.30 for HT-29 cancer cells and 1.77 for HepG2 cancer cells. At concentrations below 102.2 µM, these materials are not hemolytic, so they will not be harmful when found in the bloodstream. In conclusion, hybrid systems based on phyto-Ag/AgClNPs, artificial cell membranes, and chitosan can be considered potential adjuvants in liver and colorectal cancer treatment.
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Affiliation(s)
- Yulia Gorshkova
- Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Joliot-Curie, 6, 141980 Dubna, Russia; (Y.G.); (G.B.); (V.T.)
- Institute of Physics, Kazan Federal University, 16a Kremlyovskaya Street, 420008 Kazan, Russia
| | - Marcela-Elisabeta Barbinta-Patrascu
- Department of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania;
| | - Gizo Bokuchava
- Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Joliot-Curie, 6, 141980 Dubna, Russia; (Y.G.); (G.B.); (V.T.)
| | - Nicoleta Badea
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, 1-7, Polizu Street, 011061 Bucharest, Romania; (N.B.); (C.U.)
| | - Camelia Ungureanu
- General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, 1-7, Polizu Street, 011061 Bucharest, Romania; (N.B.); (C.U.)
| | - Andrada Lazea-Stoyanova
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania;
| | - Mina Răileanu
- Department of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania;
- Department of Life and Environmental Physics, Institute for Physics and Nuclear Engineering, Horia Hulubei National, Reactorului, 30, 077125 Magurele, Romania;
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Institute for Physics and Nuclear Engineering, Horia Hulubei National, Reactorului, 30, 077125 Magurele, Romania;
| | - Vitaly Turchenko
- Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Joliot-Curie, 6, 141980 Dubna, Russia; (Y.G.); (G.B.); (V.T.)
- Department of Crystal Growth Laboratory, South Ural State University, 76, Lenin Aven., 454080 Chelyabinsk, Russia
| | - Alexander Zhigunov
- Institute of Macromolecular Chemistry AS CR, Heyrovskeho nam. 2, 162 06 Prague 6, Czech Republic;
| | - Ewa Juszyńska-Gałązka
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Krakow, Poland;
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16
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Zgura I, Enculescu M, Istrate C, Negrea R, Bacalum M, Nedelcu L, Barbinta-Patrascu ME. Performant Composite Materials Based on Oxide Semiconductors and Metallic Nanoparticles Generated from Cloves and Mandarin Peel Extracts. Nanomaterials (Basel) 2020; 10:nano10112146. [PMID: 33126507 PMCID: PMC7693827 DOI: 10.3390/nano10112146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/21/2020] [Accepted: 10/26/2020] [Indexed: 12/21/2022]
Abstract
In this work, the metal and semiconducting nanoparticles (AgNPs, ZnONPs and AgZnONPs) were phyto-synthesized using aqueous vegetal extracts from: Caryophyllus aromaticus L. (cloves) and Citrus reticulata L. (mandarin) peels. The morphological, structural, compositional, optical and biological properties (antibacterial activity, and cytotoxicity) of the prepared composites were investigated. The most effective sample proved to be AgZnONPs, derived from cloves, with a minimum inhibitory concentration (MIC) value of 0.11 mg/mL and a minimum bactericidal concentration (MBC) value of 2.68 mg/mL. All the other three composites inhibited bacterial growth at a concentration between 0.25 mg/mL and 0.37 mg/mL, with a bactericidal concentration between 3 mg/mL and 4 mg/mL. The obtained composites presented biocidal activity against Staphylococcus aureus, and biocompatibility (on human fibroblast BJ cells) and did not damage the human red blood cells. Additionally, an important result is that the presence of silver in composite materials improved the bactericidal action of these nanomaterials against the most common nosocomial pathogen, Staphylococcus aureus.
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Affiliation(s)
- Irina Zgura
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (M.E.); (C.I.); (R.N.); (L.N.)
- Correspondence: (I.Z.); (M.E.B.-P.)
| | - Monica Enculescu
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (M.E.); (C.I.); (R.N.); (L.N.)
| | - Cosmin Istrate
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (M.E.); (C.I.); (R.N.); (L.N.)
| | - Raluca Negrea
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (M.E.); (C.I.); (R.N.); (L.N.)
| | - Mihaela Bacalum
- Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), Department of Life and Environmental Physics, 077125 Bucharest-Magurele, Romania;
| | - Liviu Nedelcu
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania; (M.E.); (C.I.); (R.N.); (L.N.)
| | - Marcela Elisabeta Barbinta-Patrascu
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Bucharest-Magurele, Romania
- Correspondence: (I.Z.); (M.E.B.-P.)
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17
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Tie L, Răileanu M, Bacalum M, Codita I, Negrea ȘM, Caracoti CȘ, Drăgulescu EC, Campu A, Astilean S, Focsan M. Versatile Polypeptide-Functionalized Plasmonic Paper as Synergistic Biocompatible and Antimicrobial Nanoplatform. Molecules 2020; 25:E3182. [PMID: 32668589 PMCID: PMC7397136 DOI: 10.3390/molecules25143182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/03/2020] [Accepted: 07/09/2020] [Indexed: 11/16/2022] Open
Abstract
Nowadays, thanks to nanotechnological progress, which itself guides us more and more closely toward not only the efficient design of innovative nanomaterials or nanostructures, but to the improvement of their functionality, we benefit from an important asset in the battle against pathogenic illnesses. Herein, we report a versatile biocompatible plasmonic nanoplatform based on a Whatman paper incorporating positively-charged gold nanospherical particles via the immersion approach. The morphological characterization of the as-engineered-plasmonic paper was examined by SEM (scanning electron microscopy) and HRTEM (high-resolution transmission electron microscopy) investigations, while its surface chemical modification with a synthetic polypeptide, specifically RRWHRWWRR-NH2 (P2), was proved by monitoring the plasmonic response of loaded gold nanospheres and the emission signal of P2 via fluorescence spectroscopy. The as-functionalized plasmonic paper is non-cytotoxic towards BJ fibroblast human cells at bactericidal concentrations. Finally, the antimicrobial activity of the P2-functionalized plasmonic paper on both planktonic bacteria and biofilms was tested against two reference strains: Gram-positive Bacteria, i.e., Staphylococcus aureus and the Gram-negative Bacteria, i.e., Escherichia coli, determining microbial inhibition of up to 100% for planktonic bacteria. In line with the above presented nanoplatform's proper design, followed by their functionalization with active antimicrobial peptides, new roads can be open for determining antibiotic-free treatments against different relevant pathogens.
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Affiliation(s)
- Leopold Tie
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurean No.42, 400271 Cluj-Napoca, Romania; (L.T.); (A.C.); (S.A.)
- Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, M Kogalniceanu No. 1, 400084 Cluj-Napoca, Romania
| | - Mina Răileanu
- Department of Life and Environmental Physics, Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania; (M.R.); (M.B.)
- Department of Electricity, Solid State and Biophysics, Faculty of Physics, University of Bucharest, 077125 Măgurele, Romania
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute of Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania; (M.R.); (M.B.)
| | - Irina Codita
- Cantacuzino National Medical-Military Institute for Research-Development, Splaiul Independenței 103, 050096 Bucharest, Romania; (I.C.); (S.M.N.); (C.S.C.); (E.-C.D.)
| | - Ștefania Mădălina Negrea
- Cantacuzino National Medical-Military Institute for Research-Development, Splaiul Independenței 103, 050096 Bucharest, Romania; (I.C.); (S.M.N.); (C.S.C.); (E.-C.D.)
| | - Costin Ștefan Caracoti
- Cantacuzino National Medical-Military Institute for Research-Development, Splaiul Independenței 103, 050096 Bucharest, Romania; (I.C.); (S.M.N.); (C.S.C.); (E.-C.D.)
| | - Elena-Carmina Drăgulescu
- Cantacuzino National Medical-Military Institute for Research-Development, Splaiul Independenței 103, 050096 Bucharest, Romania; (I.C.); (S.M.N.); (C.S.C.); (E.-C.D.)
| | - Andreea Campu
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurean No.42, 400271 Cluj-Napoca, Romania; (L.T.); (A.C.); (S.A.)
| | - Simion Astilean
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurean No.42, 400271 Cluj-Napoca, Romania; (L.T.); (A.C.); (S.A.)
- Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, M Kogalniceanu No. 1, 400084 Cluj-Napoca, Romania
| | - Monica Focsan
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurean No.42, 400271 Cluj-Napoca, Romania; (L.T.); (A.C.); (S.A.)
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Popa C, Bratu AM, Petrus M, Bacalum M. The Analysis of Lead Phytotoxicity in Seeds Using CO 2 Laser Photoacoustic Spectroscopy. Molecules 2020; 25:molecules25071637. [PMID: 32252370 PMCID: PMC7181042 DOI: 10.3390/molecules25071637] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 11/16/2022] Open
Abstract
Lead (Pb) is the most prevalent heavy metal pollutant in the natural environment. Pb is not a fundamental element for plants, but they absorb it when it is present in their environment, having no known physiological activity. The aim of our research was to evaluate the efficacy of laser photoacoustic spectroscopy as a tool to monitor changes induced by Pb in plant respiration by highlighting two molecular markers (C2H4 and CO2). To better understand Pb phytotoxicity, we monitored the plantlets evolution as well as the morphology of the root cells. Firstly, we showed that the treatment hinders the plantlet’s development. Furthermore, using laser photoacoustic spectroscopy, we found a decrease in the concentration of C2H4 and CO2 vapors measured in the respiration of treated plants. Finally, fluorescence microscopy results showed that in Pb treated plantlets, the cell roots morphology is clearly altered as compared with the untreated ones. All the results are well correlated and can help further in understanding Pb phytotoxicity.
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Affiliation(s)
- Cristina Popa
- National Institute for Laser, Plasma and Radiation Physic, Laser Department, 409 Atomistilor St., P.O. Box MG-36, Magurele 077125, Romania; (A.M.B.); (M.P.)
- Correspondence:
| | - Ana Maria Bratu
- National Institute for Laser, Plasma and Radiation Physic, Laser Department, 409 Atomistilor St., P.O. Box MG-36, Magurele 077125, Romania; (A.M.B.); (M.P.)
| | - Mioara Petrus
- National Institute for Laser, Plasma and Radiation Physic, Laser Department, 409 Atomistilor St., P.O. Box MG-36, Magurele 077125, Romania; (A.M.B.); (M.P.)
| | - Mihaela Bacalum
- Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Department of Life and Environmental Sciences (DFVM), Magurele 077125, Romania;
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Sadet A, Stavarache C, Bacalum M, Radu M, Bodenhausen G, Kurzbach D, Vasos PR. Hyperpolarized Water Enhances Two-Dimensional Proton NMR Correlations: A New Approach for Molecular Interactions. J Am Chem Soc 2019; 141:12448-12452. [PMID: 31368708 DOI: 10.1021/jacs.9b03651] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein and peptide interactions are characterized in the liquid state by multidimensional NMR spectroscopy experiments, which can take hours to record. We show that starting from hyperpolarized HDO, two-dimensional (2D) proton correlation maps of a peptide, either free in solution or interacting with liposomes, can be acquired in less than 60 s. In standard 2D NMR spectroscopy without hyperpolarization, the acquisition time required for similar spectral correlations is on the order of hours. This hyperpolarized experiment enables the identification of amino acids featuring solvent-interacting hydrogens and provides fast spectroscopic analysis of peptide conformers. Sensitivity-enhanced 2D proton correlation spectroscopy is a useful and straightforward tool for biochemistry and structural biology, as it does not recur to nitrogen-15 or carbon-13 isotope enrichment.
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Affiliation(s)
- Aude Sadet
- Research Institute of the University of Bucharest (ICUB) , 36-46 B-dul M. Kogalniceanu , RO-050107 Bucharest , Romania.,ELI-NP, Extreme Light Infrastructure - Nuclear Physics , IFIN-HH , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
| | - Cristina Stavarache
- Research Institute of the University of Bucharest (ICUB) , 36-46 B-dul M. Kogalniceanu , RO-050107 Bucharest , Romania.,"C.D. Nenitescu" Centre of Organic Chemistry , 202-B Spl. Independentei , RO-060023 Bucharest , Romania
| | - Mihaela Bacalum
- Department of Life and Environmental Physics , "Horia Hulubei" National Institute for Physics and Nuclear Engineering (IFIN-HH) , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
| | - Mihai Radu
- Department of Life and Environmental Physics , "Horia Hulubei" National Institute for Physics and Nuclear Engineering (IFIN-HH) , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
| | - Geoffrey Bodenhausen
- Laboratoire des Biomolécules, LBM, Département de Chimie , École Normale Supérieure, PSL University, Sorbonne Université, CNRS , 75005 Paris , France
| | - Dennis Kurzbach
- Laboratoire des Biomolécules, LBM, Département de Chimie , École Normale Supérieure, PSL University, Sorbonne Université, CNRS , 75005 Paris , France.,Institute of Biological Chemistry, Faculty of Chemistry , University of Vienna , Währinger Str. 38 , 1090 Vienna , Austria
| | - Paul R Vasos
- Research Institute of the University of Bucharest (ICUB) , 36-46 B-dul M. Kogalniceanu , RO-050107 Bucharest , Romania.,ELI-NP, Extreme Light Infrastructure - Nuclear Physics , IFIN-HH , 30 Reactorului Street , RO-077125 Bucharest-Magurele , Romania
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Barbinta-Patrascu ME, Badea N, Bacalum M, Ungureanu C, Suica-Bunghez IR, Iordache SM, Pirvu C, Zgura I, Maraloiu VA. 3D hybrid structures based on biomimetic membranes and Caryophyllus aromaticus - "green" synthesized nano-silver with improved bioperformances. Mater Sci Eng C Mater Biol Appl 2019; 101:120-137. [PMID: 31029305 DOI: 10.1016/j.msec.2019.03.069] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 10/27/2022]
Abstract
The paper describes an innovative bio-design of some hybrid nanoarchitectures containing bioartificial membranes and silver nanoparticles phytogenerated by using a natural extract Caryophyllus aromaticus (cloves) that contains many bioactive compounds. Two kinds of liposomes with and without chlorophyll a (Chla) obtained through thin film hydration method were used to achieve bio-green-generated hybrids by a simple, cost effective bottom-up approach. The characteristic peaks of CE-nAg monitored by UV-Vis absorption have firstly demonstrated the biohybrids formation. The slightly blue shift and fluorescence quenching observed by fluorescence emission spectra highlighted the formation of hybrid systems by biointeraction between lipid vesicles and silver nanoparticles. The incorporation of silver nanoparticles in lipid vesicles resulted in significant changes of FT-IR spectra of liposomes, indicating a reorganization of biomimetic membranes. All the microscopic methods (SEM, AFM and TEM) confirmed the biosynthesis of "green" AgNPs together with associated biohybrids, their spherical and quasi-spherical shapes with nano-scaled size. By TEM assay it was shown that CE-nAg are surrounded by petal like cloud structures that consist of biopolymers like proteins or polysaccharides and other phytochemicals arising from clove extract. EDS spectra confirmed the formation of phyto-nanoAg and also the presence of silver in the biohybrids. In addition, Selected Area Electron Diffraction showed characteristic polycrystalline ring patterns for a cubic structure of the clove-generated AgNPs. The hybrid materials showed efficient physical stability,i.e. ξ value of -28.0 mV (for biohybrids without Chla, BH) and of -31.7 mV (for biohybrids labelled with Chla, Chla-BH), assured by strong electrostatic repulsive forces between particles. The "green" nano-silver particles (CE-nAg) showed remarkable antioxidant activity (AA = 90.2%). The biohybrids loaded with clove-AgNPs proved to be more effective, scavenging about 98.8% of free radicals (in case of Chla-BH), and of 92.6% (in case of BH). The antibacterial effectiveness showed that green AgNPs combine in a synergistic manner the antibacterial properties of clove extract with those of silver, resulting in an enhancement of inhibition diameter, by 20%. Chla-BH proved to be more potent against Escherichia coli, than BH, exhibiting an inhibition diameter of 42 mm. Regarding the in vitro cytotoxicity against tumour cells, the CE-nAg concentration significantly influenced the cell viability, i.e. IC50 was 3.6% (v/v) for HT-29 cells. Chla-BH was more effective against HT-29 cancer cells at the concentrations ranging from 0 to 18% (v/v), when the normal cells were not affected. Clove-generated AgNPs exhibited haemolytic activity against hRBCs, while the biohybrids were haemocompatible. The action mechanism on the two cell lines (mouse fibroblast L929 cells and human colorectal adenocarcinoma HT-29 cells) investigated by fluorescence microscopy demonstrated that CE-nAg killed almost all the cells (94%) through necrosis at a concentration of 33.4% (v/v). The treatment of HT-29 cells with BH resulted in: 71.5% viable cells, 19.5% apoptotic and only 9% necrotic cells, while in the case of Chla-BH treatment, only 77.5% cells were viable, 16% cells were apoptotic and 6.5% were necrotic. In this way, the developed silver-based nanoparticles can represent viable promoters to develop new biohybrids with improved features, e.g. antioxidant and antibacterial effectiveness, haemolytic activity and greater specificity towards tumour cells.
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Affiliation(s)
- Marcela Elisabeta Barbinta-Patrascu
- University of Bucharest, Faculty of Physics, Department of Electricity, Solid-State Physics and Biophysics, 405 Atomistilor Street, PO Box MG-11, Bucharest, Magurele 077125, Romania
| | - Nicoleta Badea
- University "Politehnica" of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7, Polizu Str., 011061 Bucharest, Romania.
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului, 30, Magurele, Romania.
| | - Camelia Ungureanu
- University "Politehnica" of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7, Polizu Str., 011061 Bucharest, Romania
| | | | - Stefan Marian Iordache
- University of Bucharest, Faculty of Physics, 3Nano-SAE Research Centre, PO Box MG-38, Bucharest, Magurele 077125, Romania
| | - Cristian Pirvu
- University "Politehnica" of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7, Polizu Str., 011061 Bucharest, Romania
| | - Irina Zgura
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Bucharest, Magurele 077125, Romania
| | - Valentin Adrian Maraloiu
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Bucharest, Magurele 077125, Romania
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Chilom CG, Bacalum M, Stanescu MM, Florescu M. Insight into the interaction of human serum albumin with folic acid: A biophysical study. Spectrochim Acta A Mol Biomol Spectrosc 2018; 204:648-656. [PMID: 29982155 DOI: 10.1016/j.saa.2018.06.093] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 06/24/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Abstract
Folic acid (FA) is a water soluble bioactive food constituent from the vitamin B-family complex (B9). FA deficiency can lead to a variety of human health problems, while a high intake of FA can reduce the cytotoxicity of natural killer cells. The main goal of this study was to investigate the interaction of FA with human serum albumin (HSA) at physiological pH using ATR-FTIR, fluorescence spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy in order to understand the role of HSA as a blood transporter for FA in aqueous solution that can be used in different therapies. The quenching of HSA in the presence of FA was followed and the binding constant (Kb) was determined. The variation of electrochemical parameters proved that the FA binds to immobilized HSA and the binding constant was ten times than the value obtained when the interaction takes place between free molecules in solution when studied by fluorescence quenching. The results can be used in future studies to improve drug delivery systems or cellular uptake of folic acid and food components conjugated to HSA nanoparticles or nanocapsules.
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Affiliation(s)
- Claudia G Chilom
- Department of Electricity, Solid Physics and Biophysics, Faculty of Physics, University of Bucharest, Str. Atomistilor no. 405, CP MG - 11, Bucuresti-Magurele RO 077125, Romania
| | - Mihaela Bacalum
- Department of Life and Environmental Physics, "Horia Hulubei" National Institute of Physics and Nuclear Engineering, Str. Reactorului no. 30, P.O. BOX MG-6, Bucharest-Magurele, Romania.
| | - Mirela M Stanescu
- Faculty of Applied Sciences, University Politehnica of Bucharest, Splaiul Independentei no. 313, sector 6, RO-060042 Bucharest, Romania
| | - Monica Florescu
- Department of Fundamental, Prophylactic and Clinical Disciplines, Faculty of Medicine, Transilvania University of Brasov, Colina Universitatii no. 1, Building C, room CI30, 500068, Brasov, Romania.
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Bacalum M, Janosi L, Zorila F, Tepes AM, Ionescu C, Bogdan E, Hadade N, Craciun L, Grosu I, Turcu I, Radu M. Modulating short tryptophan- and arginine-rich peptides activity by substitution with histidine. Biochim Biophys Acta Gen Subj 2017; 1861:1844-1854. [PMID: 28372989 DOI: 10.1016/j.bbagen.2017.03.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/06/2017] [Accepted: 03/31/2017] [Indexed: 12/21/2022]
Abstract
BACKGROUND High antimicrobial efficacy of short tryptophan-and arginine-rich peptides makes them good candidates in the fight against pathogens. Substitution of tryptophan and arginine by histidine could be used to modulate the peptides efficacy by optimizing their structures. METHODS The peptide (RRWWRWWRR), reported to showed good antimicrobial efficacy, was used as template, seven new analogs being designed substituting tryptophan or arginine with histidine. The peptides' efficacy was tested against E. coli, B. subtilis and S. aureus. The cytotoxicity and hemolytic effect were evaluated and the therapeutic index was inferred for each peptide. Atomic force microscopy and molecular simulation were used to analyze the effects of peptides on bacterial membrane. RESULTS The substitution of tryptophan by histidine proved to strongly modulate the antimicrobial activity, mainly by changing the peptide-to-membrane binding energy. The substitution of arginine has low effect on the antimicrobial efficacy. The presence of histidine residue reduced the cytotoxic and hemolytic activity of the peptides in some cases maintaining the same efficacy against bacteria. The peptides' antimicrobial activity was correlated to the 3D-hydrophobic moment and to a simple structure-based packing parameter. CONCLUSION The results show that some of these peptides have the potential to become good candidates to fight against bacteria. The substitution by histidine proved to fine tune the therapeutic index allowing the optimization of the peptide structure mainly by changing its binding energy and 3D-hydrophobic moment. GENERAL SIGNIFICANCE The short tryptophan reach peptides therapeutic index can be maximized using the histidine substitution to optimize their structure.
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Affiliation(s)
- Mihaela Bacalum
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, PO Box MG-6, Măgurele 077125, Romania
| | - Lorant Janosi
- Molecular and Biomolecular Physics Department, National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293 Cluj-Napoca, Romania
| | - Florina Zorila
- Multipurpose Irradiation Facility Center, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, PO Box MG-6, Măgurele 077125, Romania
| | - Ana-Maria Tepes
- Babeş-Bolyai University, Supramolecular Organic and Organometallic Chemistry Center (SOOMCC), Cluj-Napoca, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania
| | - Cristina Ionescu
- Applied Nuclear Physics Department, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, PO Box MG-6, Măgurele 077125, Romania
| | - Elena Bogdan
- Babeş-Bolyai University, Supramolecular Organic and Organometallic Chemistry Center (SOOMCC), Cluj-Napoca, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania
| | - Niculina Hadade
- Babeş-Bolyai University, Supramolecular Organic and Organometallic Chemistry Center (SOOMCC), Cluj-Napoca, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania
| | - Liviu Craciun
- Applied Nuclear Physics Department, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, PO Box MG-6, Măgurele 077125, Romania
| | - Ion Grosu
- Babeş-Bolyai University, Supramolecular Organic and Organometallic Chemistry Center (SOOMCC), Cluj-Napoca, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania
| | - Ioan Turcu
- Molecular and Biomolecular Physics Department, National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293 Cluj-Napoca, Romania.
| | - Mihai Radu
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, PO Box MG-6, Măgurele 077125, Romania.
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Bacalum M, Wang L, Boodts S, Yuan P, Leen V, Smisdom N, Fron E, Knippenberg S, Fabre G, Trouillas P, Beljonne D, Dehaen W, Boens N, Ameloot M. A Blue-Light-Emitting BODIPY Probe for Lipid Membranes. Langmuir 2016; 32:3495-3505. [PMID: 27003513 DOI: 10.1021/acs.langmuir.6b00478] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here we describe a new BODIPY-based membrane probe (1) that provides an alternative to dialkylcarbocyanine dyes, such as DiI-C18, that can be excited in the blue spectral region. Compound 1 has unbranched octadecyl chains at the 3,5-positions and a meso-amino function. In organic solvents, the absorption and emission maxima of 1 are determined mainly by solvent acidity and dipolarity. The fluorescence quantum yield is high and reaches 0.93 in 2-propanol. The fluorescence decays are well fitted with a single-exponential in pure solvents and in small and giant unilamellar vesicles (GUV) with a lifetime of ca. 4 ns. Probe 1 partitions in the same lipid phase as DiI-C18(5) for lipid mixtures containing sphingomyelin and for binary mixtures of dipalmitoylphosphatidylcholine (DPPC) and dioleoylphosphatidylcholine (DOPC). The lipid phase has no effect on the fluorescence lifetime but influences the fluorescence anisotropy. The translational diffusion coefficients of 1 in GUVs and OLN-93 cells are of the same order as those reported for DiI-C18. The directions of the absorption and emission transition dipole moments of 1 are calculated to be parallel. This is reflected in the high steady-state fluorescence anisotropy of 1 in high ordered lipid phases. Molecular dynamic simulations of 1 in a model of the DOPC bilayer indicate that the average angle of the transition moments with respect to membrane normal is ca. 70°, which is comparable with the value reported for DiI-C18.
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Affiliation(s)
- Mihaela Bacalum
- Biomedical Research Institute, Hasselt University , Agoralaan Building C, 3590, Diepenbeek, Belgium
- Department of Life and Environmental Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering , Reactorului 30, Măgurele, 077125, Romania
| | - Lina Wang
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Stijn Boodts
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Peijia Yuan
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Volker Leen
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Nick Smisdom
- Biomedical Research Institute, Hasselt University , Agoralaan Building C, 3590, Diepenbeek, Belgium
| | - Eduard Fron
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Stefan Knippenberg
- Biomedical Research Institute, Hasselt University , Agoralaan Building C, 3590, Diepenbeek, Belgium
- Division of Theoretical Chemistry and Biology, KTH Royal Institute of Technology, School of Biotechnology , Roslagstullsbacken 15, S-106 91 Stockholm, Sweden
| | - Gabin Fabre
- LCSN-EA1069, Faculté de Pharmacie, Université de Limoges , 2, rue du Dr. Marcland, 87025 Limoges Cedex, France
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University , tř. 17 listopadu 12, 771 46 Olomouc, Czech Republic
| | - Patrick Trouillas
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University , tř. 17 listopadu 12, 771 46 Olomouc, Czech Republic
- INSERM UMR-S850, Faculté de Pharmacie, Université de Limoges , 2 rue du Docteur Marcland, 87025 Limoges Cedex, France
- Service de Chimie des Matériaux Nouveaux, Université de Mons , Place du Parc 20, B-7000 Mons, Belgium
| | - David Beljonne
- Service de Chimie des Matériaux Nouveaux, Université de Mons , Place du Parc 20, B-7000 Mons, Belgium
| | - Wim Dehaen
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Noël Boens
- Department of Chemistry, Katholieke Universiteit Leuven (KU Leuven) , Celestijnenlaan 200f - bus 02404, 3001 Leuven, Belgium
| | - Marcel Ameloot
- Biomedical Research Institute, Hasselt University , Agoralaan Building C, 3590, Diepenbeek, Belgium
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Bacalum M, Radu M. Cationic Antimicrobial Peptides Cytotoxicity on Mammalian Cells: An Analysis Using Therapeutic Index Integrative Concept. Int J Pept Res Ther 2014. [DOI: 10.1007/s10989-014-9430-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Bacalum M, Zorilă B, Radu M. Fluorescence spectra decomposition by asymmetric functions: Laurdan spectrum revisited. Anal Biochem 2013; 440:123-9. [DOI: 10.1016/j.ab.2013.05.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 05/17/2013] [Accepted: 05/22/2013] [Indexed: 10/26/2022]
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