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Flauzino JMR, Nalepa MA, Chronopoulos DD, Šedajová V, Panáček D, Jakubec P, Kührová P, Pykal M, Banáš P, Panáček A, Bakandritsos A, Otyepka M. Click and Detect: Versatile Ampicillin Aptasensor Enabled by Click Chemistry on a Graphene-Alkyne Derivative. Small 2023; 19:e2207216. [PMID: 36703534 DOI: 10.1002/smll.202207216] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/20/2022] [Indexed: 06/18/2023]
Abstract
Tackling the current problem of antimicrobial resistance (AMR) requires fast, inexpensive, and effective methods for controlling and detecting antibiotics in diverse samples at the point of interest. Cost-effective, disposable, point-of-care electrochemical biosensors are a particularly attractive option. However, there is a need for conductive and versatile carbon-based materials and inks that enable effective bioconjugation under mild conditions for the development of robust, sensitive, and selective devices. This work describes a simple and fast methodology to construct an aptasensor based on a novel graphene derivative equipped with alkyne groups prepared via fluorographene chemistry. Using click chemistry, an aptamer is immobilized and used as a successful platform for the selective determination of ampicillin in real samples in the presence of interfering molecules. The electrochemical aptasensor displayed a detection limit of 1.36 nM, high selectivity among other antibiotics, the storage stability of 4 weeks, and is effective in real samples. Additionally, structural and docking simulations of the aptamer shed light on the ampicillin binding mechanism. The versatility of this platform opens up wide possibilities for constructing a new class of aptasensor based on disposable screen-printed carbon electrodes usable in point-of-care devices.
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Affiliation(s)
- José M R Flauzino
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Martin-Alex Nalepa
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Demetrios D Chronopoulos
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Veronika Šedajová
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - David Panáček
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Petr Jakubec
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Petra Kührová
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Martin Pykal
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Pavel Banáš
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
| | - Aleš Panáček
- Department of Physical Chemistry, Faculty of Science, Palacký University, Olomouc, 771 46, Czech Republic
| | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
- Nanotechnology Centre, Centre of Energy and Environmental Technologies, VSB - Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava-Poruba, Czech Republic
| | - Michal Otyepka
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 783 71, Czech Republic
- IT4Innovations, VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava-Poruba, 708 00, Czech Republic
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Loubalová I, Zahradníková E, Masaryk L, Nemec I, Hochvaldová L, Panáček A, Kvítek L, Večeřová R, Świątkowski M, Kopel P. Antibacterial study on nickel and copper dicarboxylate complexes. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2022.121273] [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: 11/05/2022]
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3
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Hochvaldová L, Panáček D, Válková L, Prucek R, Kohlová V, Večeřová R, Kolář M, Kvítek L, Panáček A. Restoration of antibacterial activity of inactive antibiotics via combined treatment with a cyanographene/Ag nanohybrid. Sci Rep 2022; 12:5222. [PMID: 35338239 PMCID: PMC8956642 DOI: 10.1038/s41598-022-09294-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 03/14/2022] [Indexed: 11/18/2022] Open
Abstract
The number of antibiotic-resistant bacterial strains is increasing due to the excessive and inappropriate use of antibiotics, which are therefore becoming ineffective. Here, we report an effective way of enhancing and restoring the antibacterial activity of inactive antibiotics by applying them together with a cyanographene/Ag nanohybrid, a nanomaterial that is applied for the first time for restoring the antibacterial activity of antibiotics. The cyanographene/Ag nanohybrid was synthesized by chemical reduction of a precursor material in which silver cations are coordinated on a cyanographene sheet. The antibacterial efficiency of the combined treatment was evaluated by determining fractional inhibitory concentrations (FIC) for antibiotics with different modes of action (gentamicin, ceftazidime, ciprofloxacin, and colistin) against the strains Escherichia coli, Pseudomonas aeruginosa, and Enterobacter kobei with different resistance mechanisms. Synergistic and partial synergistic effects against multiresistant strains were demonstrated for all of these antibiotics except ciprofloxacin, which exhibited an additive effect. The lowest average FICs equal to 0.29 and 0.39 were obtained for colistin against E. kobei and for gentamicin against E. coli, respectively. More importantly, we have experimentally confirmed for the first time, that interaction between the antibiotic's mode of action and the mechanism of bacterial resistance strongly influenced the combined treatment’s efficacy.
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Affiliation(s)
- Lucie Hochvaldová
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - David Panáček
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic.,Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Křížkovského 511/8, 779 00, Olomouc, Czech Republic
| | - Lucie Válková
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - Robert Prucek
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - Věra Kohlová
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - Renata Večeřová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15, Olomouc, Czech Republic
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15, Olomouc, Czech Republic
| | - Libor Kvítek
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - Aleš Panáček
- Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic.
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Panáček D, Hochvaldová L, Bakandritsos A, Malina T, Langer M, Belza J, Martincová J, Večeřová R, Lazar P, Poláková K, Kolařík J, Válková L, Kolář M, Otyepka M, Panáček A, Zbořil R. Silver Covalently Bound to Cyanographene Overcomes Bacterial Resistance to Silver Nanoparticles and Antibiotics. Adv Sci (Weinh) 2021; 8:2003090. [PMID: 34194925 PMCID: PMC8224420 DOI: 10.1002/advs.202003090] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 02/22/2021] [Indexed: 05/26/2023]
Abstract
The ability of bacteria to develop resistance to antibiotics is threatening one of the pillars of modern medicine. It was recently understood that bacteria can develop resistance even to silver nanoparticles by starting to produce flagellin, a protein which induces their aggregation and deactivation. This study shows that silver covalently bound to cyanographene (GCN/Ag) kills silver-nanoparticle-resistant bacteria at concentrations 30 times lower than silver nanoparticles, a challenge which has been so far unmet. Tested also against multidrug resistant strains, the antibacterial activity of GCN/Ag is systematically found as potent as that of free ionic silver or 10 nm colloidal silver nanoparticles. Owing to the strong and multiple dative bonds between the nitrile groups of cyanographene and silver, as theory and experiments confirm, there is marginal silver ion leaching, even after six months of storage, and thus very high cytocompatibility to human cells. Molecular dynamics simulations suggest strong interaction of GCN/Ag with the bacterial membrane, and as corroborated by experiments, the antibacterial activity does not rely on the release of silver nanoparticles or ions. Endowed with these properties, GCN/Ag shows that rigid supports selectively and densely functionalized with potent silver-binding ligands, such as cyanographene, may open new avenues against microbial resistance.
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Affiliation(s)
- David Panáček
- Regional Centre of Advanced Technologies and MaterialsCzech Advanced Technology and Research InstitutePalacký University OlomoucKřížkovského 511/8Olomouc779 00Czech Republic
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
| | - Lucie Hochvaldová
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
- Nanotechnology CentreCentre of Energy and Environmental TechnologiesVŠB–Technical University of Ostrava17. listopadu 2172/15Ostrava‐Poruba708 00Czech Republic
| | - Tomáš Malina
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Michal Langer
- Regional Centre of Advanced Technologies and MaterialsCzech Advanced Technology and Research InstitutePalacký University OlomoucKřížkovského 511/8Olomouc779 00Czech Republic
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
| | - Jan Belza
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Jana Martincová
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Renata Večeřová
- Department of MicrobiologyFaculty of Medicine and DentistryPalacký University OlomoucHněvotínská 3Olomouc775 15Czech Republic
| | - Petr Lazar
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Kateřina Poláková
- Regional Centre of Advanced Technologies and MaterialsCzech Advanced Technology and Research InstitutePalacký University OlomoucKřížkovského 511/8Olomouc779 00Czech Republic
| | - Jan Kolařík
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Lucie Válková
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Milan Kolář
- Department of MicrobiologyFaculty of Medicine and DentistryPalacký University OlomoucHněvotínská 3Olomouc775 15Czech Republic
| | - Michal Otyepka
- Regional Centre of Advanced Technologies and MaterialsCzech Advanced Technology and Research InstitutePalacký University OlomoucKřížkovského 511/8Olomouc779 00Czech Republic
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Aleš Panáček
- Department of Physical ChemistryFaculty of SciencePalacký University Olomouc17. listopadu 1192/12Olomouc771 46Czech Republic
- Regional Centre of Advanced Technologies and MaterialsPalacký University OlomoucŠlechtitelů 27Olomouc783 71Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and MaterialsCzech Advanced Technology and Research InstitutePalacký University OlomoucKřížkovského 511/8Olomouc779 00Czech Republic
- Nanotechnology CentreCentre of Energy and Environmental TechnologiesVŠB–Technical University of Ostrava17. listopadu 2172/15Ostrava‐Poruba708 00Czech Republic
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Ženata O, Panáček A, Kvítek L, Vrzal R. The impact of graphene oxide on androgen receptor signalling in prostate cancer cells. Chemosphere 2021; 269:128759. [PMID: 33153849 DOI: 10.1016/j.chemosphere.2020.128759] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/21/2020] [Accepted: 10/25/2020] [Indexed: 05/14/2023]
Abstract
Androgen receptor (AR) signalling is triggered by androgens that have lipophilic nature. Since it was indicated that graphene oxide (GO) might facilitate passive diffusion of lipophilic compounds probably via Trojan horse-like mechanism, we tested the hypothesis if this suggestion would apply for androgens as well. Thus, we investigated if GO affects dihydrotestosterone (DHT)-triggered signalling of AR in two prostate cancer-derived cell lines, 22Rv1 and LNCaP. These cell lines differ in number of AR variants, i.e. there are two variants in 22Rv1 cells (full length and truncated) but only one in LNCaP cells (full length). Graphene oxide had no effect on basal luciferase activity but significantly decreased DHT-inducible AR-dependent luciferase activity in stably transfected cells. In 22Rv1 cells, it induced concentration-dependent decrease of DHT-inducible KLK3 mRNA and PSA protein after 24 h. While there was no effect on UBE2C mRNA (regulated by truncated variant), there was synergistic effect of DHT and GO on UBE2C protein level. Translocation of full-length AR (AR-FL) was potentiated by GO in the presence of DHT in 22Rv1 cells but it was suppressed in LNCaP cells. DHT-stimulated enrichment of AR-FL on KLK3 promoter was not significantly affected by GO in any tested cell line neither was KLK3 mRNA at 4 h of incubation. In conclusion, GO affects DHT-triggered signalling in both types of cells in similar manner, but ligand-triggered redistribution of AR-FL is affected differently. One of the reasons may be the presence of truncated variant of androgen receptor.
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Affiliation(s)
- Ondřej Ženata
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, Olomouc, CZ-783 71, Czech Republic
| | - Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University in Olomouc, 17. Listopadu 12, 771 46, Olomouc, Czech Republic
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University in Olomouc, 17. Listopadu 12, 771 46, Olomouc, Czech Republic
| | - Radim Vrzal
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, Olomouc, CZ-783 71, Czech Republic.
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Svoboda L, Bednář J, Dvorský R, Panáček A, Hochvaldová L, Kvítek L, Malina T, Konvičková Z, Henych J, Němečková Z, Večeřová R, Kolář M, Matýsek D, Vilamová Z. Crucial cytotoxic and antimicrobial activity changes driven by amount of doped silver in biocompatible carbon nitride nanosheets. Colloids Surf B Biointerfaces 2021; 202:111680. [PMID: 33714189 DOI: 10.1016/j.colsurfb.2021.111680] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 02/08/2021] [Accepted: 03/05/2021] [Indexed: 11/28/2022]
Abstract
The use of Ag-modified nanomaterials continues to attract attention in biological contamination control, their potential cytotoxicity is often overlooked. Herein, biocompatible carbon nitride is modified with 1 and 5 wt.% Ag and effects of different nanomaterial dose and Ag content on antimicrobial activity and cytotoxicity is studied. Pure Ag nanoparticles and AgNO3 is tested for comparison, together with ten bacterial strains including pan-resistant Pseudomonas aeruginosa. Cytotoxicity is then investigated in three adherent and two suspension human cell lines, and results confirm that cancer adherent cell lines are the most immune lines and human cervical adenocarcinoma cells (HeLa) are more resilient than human lung adenocarcinoma cells (A549). The HeLa remains over 90 % viable even after 24 -h treatment with the highest concentration of 5%Ag/g-C3N4 (300 mg L-1) while A549 sustained viability only up to 100 mg L-1. Higher concentrations then induce cytotoxicity and A549 cell viability decreases. Our results show the importance of complementary testing of cytotoxicity by LIVE/DEAD assay using flow cytometry with more different human cell lines, which might be less immune to tested nanomaterials than HeLa and A549. Combined controls of new antibacterial agent activity tests then provide increased knowledge of their biocompatibility.
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Affiliation(s)
- Ladislav Svoboda
- Nanotechnology Centre, CEET, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic; IT4Innovations, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic.
| | - Jiří Bednář
- Nanotechnology Centre, CEET, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic; IT4Innovations, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic
| | - Richard Dvorský
- Nanotechnology Centre, CEET, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic; IT4Innovations, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic
| | - Aleš Panáček
- Department of Physical Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, Olomouc, 77146, Czech Republic
| | - Lucie Hochvaldová
- Department of Physical Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, Olomouc, 77146, Czech Republic
| | - Libor Kvítek
- Department of Physical Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, Olomouc, 77146, Czech Republic
| | - Tomáš Malina
- Department of Physical Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, Olomouc, 77146, Czech Republic; Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, Olomouc, 78 371, Czech Republic
| | - Zuzana Konvičková
- Nanotechnology Centre, CEET, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic; ENET Centre, CEET, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic
| | - Jiří Henych
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež, 1001, 250 68, Řež, Czech Republic
| | - Zuzana Němečková
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež, 1001, 250 68, Řež, Czech Republic
| | - Renata Večeřová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15, Olomouc, Czech Republic
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15, Olomouc, Czech Republic
| | - Dalibor Matýsek
- Institute of Geological Engineering, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic
| | - Zuzana Vilamová
- Nanotechnology Centre, CEET, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava, 708 00, Czech Republic
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Malá Z, Žárská L, Bajgar R, Bogdanová K, Kolář M, Panáček A, Binder S, Kolářová H. The application of antimicrobial photodynamic inactivation on methicillin-resistant S. aureus and ESBL-producing K. pneumoniae using porphyrin photosensitizer in combination with silver nanoparticles. Photodiagnosis Photodyn Ther 2020; 33:102140. [PMID: 33307229 DOI: 10.1016/j.pdpdt.2020.102140] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 11/10/2020] [Accepted: 12/04/2020] [Indexed: 12/12/2022]
Abstract
As resistance of bacterial strains to antibiotics is a major problem, there is a need to look for alternative treatments. One option is antimicrobial photodynamic inactivation (aPDI). The pathogenic cells are targeted by a nontoxic photosensitizer while the surrounding healthy tissue is relatively unaffected. The photosensitizer is activated by light of t appropriate wavelength resulting in the generation of reactive oxygen species that are cytotoxic for the pathogens. In this work, the photosensitizer TMPyP and silver nanoparticles (AgNPs) were investigated for their synergistic antibacterial effect. We tested these two substances on two bacterial strains, methicillin-resistant Staphylococcus aureus 4591 (MRSA) and extended-spectrum beta-lactamases-producing Klebsiella pneumoniae 2486 (ESBL-KP), to compare their effectiveness. The bacteria were first incubated with TMPyP for 45 min or 5 h, then irradiated with a LED source with the total fluence of 10 or 20 J/cm2 and then placed in a microbiological growth medium supplemented with AgNPs. To accomplish the synergistic effect, the optimal combination of TMPyP and AgNPs was estimated as 1.56-25 μM for TMPyP and 3.38 mg/l for AgNPs in case of MRSA and 1.56-50 μM for TMPyP and 3.38 mg/l for AgNPs in case of ESBL-KP at 45 min incubation with TMPyP and fluence of 10 J/cm2. Longer incubation and/or longer irradiation led to a decrease in the maximum values of the photosensitizer concentration to produce the synergistic effect. From this work it can be concluded that the combination of antimicrobial photodynamic inactivation with a treatment including silver nanoparticles could be a promising approach to treat bacterial infection.
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Affiliation(s)
- Zuzana Malá
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
| | - Ludmila Žárská
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
| | - Robert Bajgar
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
| | - Kateřina Bogdanová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
| | - Aleš Panáček
- Department of Physical Chemistry, Regional Centre of Advanced Technologies, Faculty of Science, Palacky University in Olomouc, Czech Republic.
| | - Svatopluk Binder
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
| | - Hana Kolářová
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic; Department of Medical Biophysics, Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University in Olomouc, Czech Republic.
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Ženata O, Vrzalová A, Bachleda P, Janečková J, Panáček A, Kvítek L, Vrzal R. The effect of graphene oxide on signalling of xenobiotic receptors involved in biotransformation. Chemosphere 2020; 253:126753. [PMID: 32464781 DOI: 10.1016/j.chemosphere.2020.126753] [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] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
Graphene oxide (GO) is an engineered nanomaterial which was demonstrated to have outstanding capacity for adsorption of organic pollutants such as polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs), the ligands and activators of the aryl hydrocarbon receptor (AhR). Due to the partially overlapping ligand capacity of AhR and pregnane X receptor (PXR), we tested the impact of GO particles on their signalling. While reporter gene assay revealed potentiating effect of GO on ligand-activated AhR-dependent luciferase activity, there was no effect for PXR. However, inducible target genes for AhR (CYP1A1) or PXR (ABCB1) were decreased at mRNA as well as protein levels by the presence of GO in HepG2 (for AhR), LS180 (for PXR) or primary human hepatocytes (both receptors). Moreover, the presence of GO diminished PXR and AhR protein levels in primary cultures of human hepatocytes. This was partially reversed by proteasome inhibitor MG132 for AhR but not for PXR. In conclusion, GO decreases ligand-stimulated activities of AhR and PXR in human cells.
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Affiliation(s)
- Ondřej Ženata
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, Olomouc, CZ-783 71, Czech Republic
| | - Aneta Vrzalová
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, Olomouc, CZ-783 71, Czech Republic
| | - Petr Bachleda
- Department of Surgery, University Hospital, I.P. Pavlova 6, 775 15, Olomouc, Czech Republic
| | - Jana Janečková
- Department of Surgery, University Hospital, I.P. Pavlova 6, 775 15, Olomouc, Czech Republic
| | - Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University in Olomouc, 17. listopadu 12, 771 46, Olomouc, Czech Republic
| | - Radim Vrzal
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, Olomouc, CZ-783 71, Czech Republic.
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Chupani L, Niksirat H, Velíšek J, Stará A, Hradilová Š, Kolařík J, Panáček A, Zusková E. Chronic dietary toxicity of zinc oxide nanoparticles in common carp (Cyprinus carpio L.): Tissue accumulation and physiological responses. Ecotoxicol Environ Saf 2018; 147:110-116. [PMID: 28841525 DOI: 10.1016/j.ecoenv.2017.08.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [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: 12/17/2016] [Revised: 08/08/2017] [Accepted: 08/11/2017] [Indexed: 06/07/2023]
Abstract
Concerns regarding the potential toxic effects of zinc oxide nanoparticles (ZnO NPs) on aquatic organisms are growing due to the fact that NPs may be released into aquatic ecosystems. This study aimed to investigate the effects of dietary exposure to ZnO NPs on juvenile common carp (Cyprinus carpio). Fish were fed a spiked diets at doses 50 and 500mg of ZnO NPs per kg of feed for 6 weeks followed by a 2-week recovery period. Fish were sampled every 2 weeks for haematology trends, blood biochemistry measures, histology analyses, and determination of the accumulation of zinc in tissues. At the end of the exposure and post-exposure periods, fish were sampled for an assessment of lipid peroxidation levels. Dietborne ZnO NPs had no effects on haematology, blood biochemistry, and lipid peroxidation levels during the exposure period. After the recovery period, aspartate aminotransferase activity significantly (p < 0.05) increased and alanine transferase activity significantly (p < 0.05) decreased in the higher exposure group. The level of lipid peroxidation significantly (p < 0.05) decreased in liver of treated fish after 2 weeks post-exposure period. A histological examination revealed mild histopathological changes in kidneys during exposure. Our results did not show a significant increase of zinc content at the end of experiment in any of tested organs. However, chronic dietary exposure to ZnO NPs might affect kidney and liver function.
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Affiliation(s)
- Latifeh Chupani
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic.
| | - Hamid Niksirat
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
| | - Josef Velíšek
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
| | - Alžběta Stará
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
| | - Šárka Hradilová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| | - Jan Kolařík
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| | - Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Eliška Zusková
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
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10
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Panáček A, Kvítek L, Smékalová M, Večeřová R, Kolář M, Röderová M, Dyčka F, Šebela M, Prucek R, Tomanec O, Zbořil R. Bacterial resistance to silver nanoparticles and how to overcome it. Nat Nanotechnol 2018; 13:65-71. [PMID: 29203912 DOI: 10.1038/s41565-017-0013-y] [Citation(s) in RCA: 450] [Impact Index Per Article: 75.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 10/04/2017] [Indexed: 05/20/2023]
Abstract
Silver nanoparticles have already been successfully applied in various biomedical and antimicrobial technologies and products used in everyday life. Although bacterial resistance to antibiotics has been extensively discussed in the literature, the possible development of resistance to silver nanoparticles has not been fully explored. We report that the Gram-negative bacteria Escherichia coli 013, Pseudomonas aeruginosa CCM 3955 and E. coli CCM 3954 can develop resistance to silver nanoparticles after repeated exposure. The resistance stems from the production of the adhesive flagellum protein flagellin, which triggers the aggregation of the nanoparticles. This resistance evolves without any genetic changes; only phenotypic change is needed to reduce the nanoparticles' colloidal stability and thus eliminate their antibacterial activity. The resistance mechanism cannot be overcome by additional stabilization of silver nanoparticles using surfactants or polymers. It is, however, strongly suppressed by inhibiting flagellin production with pomegranate rind extract.
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Affiliation(s)
- Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University Olomouc, Olomouc, Czech Republic
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University Olomouc, Olomouc, Czech Republic.
| | - Monika Smékalová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University Olomouc, Olomouc, Czech Republic
| | - Renata Večeřová
- Department of Microbiology, Palacký University Olomouc, Olomouc, Czech Republic
| | - Milan Kolář
- Department of Microbiology, Palacký University Olomouc, Olomouc, Czech Republic
| | - Magdalena Röderová
- Department of Microbiology, Palacký University Olomouc, Olomouc, Czech Republic
| | - Filip Dyčka
- Department of Protein Biochemistry and Proteomics, Centre of the Region Hana for Biotechnological and Agricultural Research, Palacký University Olomouc, Olomouc, Czech Republic
| | - Marek Šebela
- Department of Protein Biochemistry and Proteomics, Centre of the Region Hana for Biotechnological and Agricultural Research, Palacký University Olomouc, Olomouc, Czech Republic
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University Olomouc, Olomouc, Czech Republic
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Olomouc, Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University Olomouc, Olomouc, Czech Republic.
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Večeřová R, Panáček A, Kolář M. [Effect of silver nanoparticles on anaerobic bacteria]. Klin Mikrobiol Infekc Lek 2017; 23:17-20. [PMID: 28467592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE The aim was to evaluate the antibacterial effect of silver nanoparticles on anaerobic bacteria. MATERIAL AND METHODS The microdilution method was used to determine the minimum inhibitory concentrations (MICs) of 28 nm silver nanoparticles, both unstabilized and stabilized by casein, gelatin and polyacrylic acid. The following anaerobic bacteria were tested: Bacteroides fragilis, Bacteroides thetaiotaomicron, Eggerthella lenta, Propionibacterium acnes, Clostridium perfringens, Clostridium difficile and Fusobacterium varium. RESULTS Unstabilized silver nanoparticles exhibited antibacterial activity at concentrations ranging from 13 to 34 mg/L. A more significant effect with MIC values between 1 and 13 mg/L was shown for silver nanoparticles stabilized by casein. CONCLUSION Unstabilized silver nanoparticles are active against anaerobic bacteria at concentrations proved to be cytotoxic to eukaryotic cells of human fibroblasts and multicellular organisms. Silver nanoparticles stabilized by casein appear to be more suitable for further research.
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Affiliation(s)
- Renata Večeřová
- Faculty of Medicine and Dentistry, Palacky Univerzity Olomouc, Department of Microbiology, Czech Republic, e-mail:
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12
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Chupani L, Zusková E, Niksirat H, Panáček A, Lünsmann V, Haange SB, von Bergen M, Jehmlich N. Effects of chronic dietary exposure of zinc oxide nanoparticles on the serum protein profile of juvenile common carp (Cyprinus carpio L.). Sci Total Environ 2017; 579:1504-1511. [PMID: 27916310 DOI: 10.1016/j.scitotenv.2016.11.154] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [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: 10/03/2016] [Revised: 11/21/2016] [Accepted: 11/21/2016] [Indexed: 05/20/2023]
Abstract
Zinc oxide (ZnO) nanoparticles (NPs) have been dramatically used in industry, biology, and medicine. Despite their interesting physico-chemical properties for application in various industrial, medical, and consumer products, safe use of ZnO NPs are under challenges due to the inadequate information related to their toxicological endpoints. Proteomics was applied to evaluate the sub-lethal effects of dietary exposure to ZnO NPs on serum proteome profile of juvenile common carp, (Cyprinus carpio). Therefore, ZnO NPs solution (500mgkg-1 of feed) was added to a commercial carp feed for six weeks. We compared the serum proteome profile from 7 controls and 7 treated fish. In addition, zinc accumulation were measured in intestine, liver, gill and brain. In total, we were able to identify 326 proteins from 6845 distinct peptides. As a result of the data analysis, the abundance levels of four proteins were significantly altered (fold change (fc) ≥2 and p<0.05) after dietary exposure to ZnO NPs. The protein levels of the complement component C4-2 (fc 2.5) and the uncharacterised protein encoded by kng1 (fc 5.8) were increased and major histocompatibility class I (fc 4.9) and the uncharacterised protein encoded by lum (fc 3.5) were decreased (fc 2.5). Molecular pathway analysis revealed four canonical pathways including acute-phase response signalling, liver and retinoid X receptors activation, and intrinsic and extrinsic prothrombin activation pathways as significantly regulated in the treated fish. No significant difference was observed for zinc accumulation in exposed fish compared to controls. In summary, despite no apparent accumulation, ZnO NPs exposure to common carp probably disturbs the fish homeostasis by affecting proteins of the haematological and the immune systems.
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Affiliation(s)
- Latifeh Chupani
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic.
| | - Eliška Zusková
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
| | - Hamid Niksirat
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Vodňany, Czech Republic
| | - Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Vanessa Lünsmann
- Helmholtz-Centre for Environmental Research-UFZ, Department of Molecular Systems Biology, Leipzig, Germany
| | - Sven-Bastiaan Haange
- Helmholtz-Centre for Environmental Research-UFZ, Department of Molecular Systems Biology, Leipzig, Germany
| | - Martin von Bergen
- Helmholtz-Centre for Environmental Research-UFZ, Department of Molecular Systems Biology, Leipzig, Germany; University of Leipzig, Faculty of Biosciences, Pharmacy and Psychology, Institute of Biochemistry, Leipzig, Germany; Aalborg University, Department of Chemistry and Bioscience, 9220 Aalborg, Denmark
| | - Nico Jehmlich
- Helmholtz-Centre for Environmental Research-UFZ, Department of Molecular Systems Biology, Leipzig, Germany
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Suchomel P, Prucek R, Černá K, Fargašová A, Panáček A, Gedanken A, Zbořil R, Kvítek L. Highly efficient silver particle layers on glass substrate synthesized by the sonochemical method for surface enhanced Raman spectroscopy purposes. Ultrason Sonochem 2016; 32:165-172. [PMID: 27150757 DOI: 10.1016/j.ultsonch.2016.03.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 03/04/2016] [Accepted: 03/05/2016] [Indexed: 06/05/2023]
Abstract
A fast method for preparing of silver particle layers on glass substrates with high application potential for using in surface enhanced Raman spectroscopy (SERS) is introduced. Silver particle layers deposited on glass cover slips were generated in one-step process by reduction of silver nitrate using several reducing agents (ethylene glycol, glycerol, maltose, lactose and glucose) under ultrasonic irradiation. This technique allows the formation of homogeneous layers of silver particles with sizes from 80nm up to several hundred nanometers depending on the nature of the used reducing agent. Additionally, the presented method is not susceptible to impurities on the substrate surface and it does not need any additives to capture or stabilize the silver particles on the glass surface. The characteristics of prepared silver layers on glass substrate by the above mentioned sonochemical approach was compared with chemically prepared ones. The prepared layers were tested as substrates for SERS using adenine as a model analyte. The factor of Raman signal enhancement reached up to 5·10(5). On the contrary, the chemically prepared silver layers does not exhibit almost any pronounced Raman signal enhancement. Presented sonochemical approach for preparation of silver particle layers is fast, simple, robust, and is better suited for reproducible fabrication functional SERS substrates than chemical one.
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Affiliation(s)
- Petr Suchomel
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic.
| | - Klára Černá
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Ariana Fargašová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Aharon Gedanken
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
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14
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Panáček A, Smékalová M, Večeřová R, Bogdanová K, Röderová M, Kolář M, Kilianová M, Hradilová Š, Froning JP, Havrdová M, Prucek R, Zbořil R, Kvítek L. Silver nanoparticles strongly enhance and restore bactericidal activity of inactive antibiotics against multiresistant Enterobacteriaceae. Colloids Surf B Biointerfaces 2016; 142:392-399. [PMID: 26970828 DOI: 10.1016/j.colsurfb.2016.03.007] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [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: 10/26/2015] [Revised: 03/01/2016] [Accepted: 03/02/2016] [Indexed: 11/26/2022]
Abstract
Bacterial resistance to conventional antibiotics is currently one of the most important healthcare issues, and has serious negative impacts on medical practice. This study presents a potential solution to this problem, using the strong synergistic effects of antibiotics combined with silver nanoparticles (NPs). Silver NPs inhibit bacterial growth via a multilevel mode of antibacterial action at concentrations ranging from a few ppm to tens of ppm. Silver NPs strongly enhanced antibacterial activity against multiresistant, β-lactamase and carbapenemase-producing Enterobacteriaceae when combined with the following antibiotics: cefotaxime, ceftazidime, meropenem, ciprofloxacin and gentamicin. All the antibiotics, when combined with silver NPs, showed enhanced antibacterial activity at concentrations far below the minimum inhibitory concentrations (tenths to hundredths of one ppm) of individual antibiotics and silver NPs. The enhanced activity of antibiotics combined with silver NPs, especially meropenem, was weaker against non-resistant bacteria than against resistant bacteria. The double disk synergy test showed that bacteria produced no β-lactamase when treated with antibiotics combined with silver NPs. Low silver concentrations were required for effective enhancement of antibacterial activity against multiresistant bacteria. These low silver concentrations showed no cytotoxic effect towards mammalian cells, an important feature for potential medical applications.
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Affiliation(s)
- Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Monika Smékalová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Renata Večeřová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic
| | - Kateřina Bogdanová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic
| | - Magdaléna Röderová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic
| | - Martina Kilianová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Šárka Hradilová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Jens P Froning
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Markéta Havrdová
- Regional Centre of Advanced Technologies and Materials, Department of Experimental Physics, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic
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15
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Panáček A, Smékalová M, Kilianová M, Prucek R, Bogdanová K, Večeřová R, Kolář M, Havrdová M, Płaza GA, Chojniak J, Zbořil R, Kvítek L. Strong and Nonspecific Synergistic Antibacterial Efficiency of Antibiotics Combined with Silver Nanoparticles at Very Low Concentrations Showing No Cytotoxic Effect. Molecules 2015; 21:E26. [PMID: 26729075 PMCID: PMC6273824 DOI: 10.3390/molecules21010026] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [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: 10/01/2015] [Revised: 12/15/2015] [Accepted: 12/17/2015] [Indexed: 01/05/2023] Open
Abstract
The resistance of bacteria towards traditional antibiotics currently constitutes one of the most important health care issues with serious negative impacts in practice. Overcoming this issue can be achieved by using antibacterial agents with multimode antibacterial action. Silver nano-particles (AgNPs) are one of the well-known antibacterial substances showing such multimode antibacterial action. Therefore, AgNPs are suitable candidates for use in combinations with traditional antibiotics in order to improve their antibacterial action. In this work, a systematic study quantifying the synergistic effects of antibiotics with different modes of action and different chemical structures in combination with AgNPs against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus was performed. Employing the microdilution method as more suitable and reliable than the disc diffusion method, strong synergistic effects were shown for all tested antibiotics combined with AgNPs at very low concentrations of both antibiotics and AgNPs. No trends were observed for synergistic effects of antibiotics with different modes of action and different chemical structures in combination with AgNPs, indicating non-specific synergistic effects. Moreover, a very low amount of silver is needed for effective antibacterial action of the antibiotics, which represents an important finding for potential medical applications due to the negligible cytotoxic effect of AgNPs towards human cells at these concentration levels.
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Affiliation(s)
- Aleš Panáček
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Monika Smékalová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Martina Kilianová
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Kateřina Bogdanová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic.
| | - Renata Večeřová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic.
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University in Olomouc, Hněvotínská 5, 775 15 Olomouc, Czech Republic.
| | - Markéta Havrdová
- Regional Centre of Advanced Technologies and Materials, Department of Experimental Physics and Physical Chemistry, faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Grażyna Anna Płaza
- Department of Environmental Microbiology, Institute for Ecology of Industrial Areas, Kossutha 6, 40-844 Katowice, Poland.
| | - Joanna Chojniak
- Department of Environmental Microbiology, Institute for Ecology of Industrial Areas, Kossutha 6, 40-844 Katowice, Poland.
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 listopadu 12, 771 46 Olomouc, Czech Republic.
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16
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Chládková B, Evgenidou E, Kvítek L, Panáček A, Zbořil R, Kovář P, Lambropoulou D. Adsorption and photocatalysis of nanocrystalline TiO2 particles for Reactive Red 195 removal: effect of humic acids, anions and scavengers. Environ Sci Pollut Res Int 2015; 22:16514-16524. [PMID: 26054457 DOI: 10.1007/s11356-015-4806-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 02/15/2015] [Accepted: 05/27/2015] [Indexed: 06/04/2023]
Abstract
In the present study, the coupling of adsorption capacity and photocatalytic efficiency of two different industrially produced titania catalysts was investigated and compared. The azo dye Reactive Red 195 was selected as a model compound. The tested catalysts, PK-10 and PK-180, exhibited different adsorption capacities due to their significant difference in their specific surface, but both have proven to be effective photocatalysts for photodegradation of the studied dye. PK-10 exhibited strong adsorption of the studied dye due to its high specific surface area, while the second studied catalyst, PK-180, demonstrated negligible adsorption of Reactive Red 195. The effect of the pH, the concentration of the catalyst and the initial concentration of the dye appear to affect the photocatalytic rate. The effect of the presence of humic acids and inorganic ions was also examined, while the contribution of various reactive species was indirectly evaluated through the addition of various scavengers. To evaluate the extent of mineralisation of the studied dye, total organic carbon (TOC) measurements during the experiment were also conducted. Besides total colour removal, evident reduction of TOC was also achieved using both catalysts.
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Affiliation(s)
- B Chládková
- Department of Physical Chemistry, Palacký University, Olomouc, Czech Republic
| | - E Evgenidou
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - L Kvítek
- Department of Physical Chemistry, Palacký University, Olomouc, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Palacký University, Olomouc, Czech Republic
| | - A Panáček
- Department of Physical Chemistry, Palacký University, Olomouc, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Palacký University, Olomouc, Czech Republic
| | - R Zbořil
- Department of Physical Chemistry, Palacký University, Olomouc, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Palacký University, Olomouc, Czech Republic
| | - P Kovář
- Precheza a.s., Dr. Edvarda Beneše, Přerov, Czech Republic
| | - D Lambropoulou
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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Fargašová A, Prucek R, Ranc V, Panáček A, Kvítek L, Zbořil R. Influence of various chloride ion concentrations on silver nanoparticle transformations and effectiveness in surface enhanced Raman scattering for different excitation wavelengths. RSC Adv 2015. [DOI: 10.1039/c4ra13881c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study reports the effect of six various concentrations of chlorides on the surface enhanced Raman scattering activity of silver nanoparticles.
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Affiliation(s)
- Ariana Fargašová
- Regional Centre of Advanced Technologies and Materials
- Department of Physical Chemistry
- Faculty of Science
- Palacky University Olomouc
- 783 71 Olomouc
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials
- Department of Physical Chemistry
- Faculty of Science
- Palacky University Olomouc
- 783 71 Olomouc
| | - Václav Ranc
- Regional Centre of Advanced Technologies and Materials
- Department of Physical Chemistry
- Faculty of Science
- Palacky University Olomouc
- 783 71 Olomouc
| | - Aleš Panáček
- Regional Centre of Advanced Technologies and Materials
- Department of Physical Chemistry
- Faculty of Science
- Palacky University Olomouc
- 783 71 Olomouc
| | - Libor Kvítek
- Regional Centre of Advanced Technologies and Materials
- Department of Physical Chemistry
- Faculty of Science
- Palacky University Olomouc
- 783 71 Olomouc
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials
- Department of Physical Chemistry
- Faculty of Science
- Palacky University Olomouc
- 783 71 Olomouc
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Kilianová M, Prucek R, Filip J, Kolařík J, Kvítek L, Panáček A, Tuček J, Zbořil R. Remarkable efficiency of ultrafine superparamagnetic iron(III) oxide nanoparticles toward arsenate removal from aqueous environment. Chemosphere 2013; 93:2690-2697. [PMID: 24054133 DOI: 10.1016/j.chemosphere.2013.08.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 04/08/2013] [Revised: 08/15/2013] [Accepted: 08/16/2013] [Indexed: 06/02/2023]
Abstract
Arsenates, when present in water resources, constitute a risk to human health. In order to remove them, various technologies have been developed; out of them, sorption approach is widely adopted employing a wide spectrum of suitable sorbent materials. Nanoparticles of iron oxide are frequently used due to a high surface area and ability to control them by external magnetic field. In this work, we report on a simple and cheap synthesis of ultrafine iron(III) oxide nanoparticles with a narrow size distribution and their exploitation in the field of arsenate removal from aqueous environment. It is shown that the adsorption capacity is enhanced by a mesoporous nature of nanoparticle arrangement in their system due to strong magnetic interactions they evolve between nanoparticles. A complete arsenate removal is achieved at Fe/As ratio equal to ∼20/1 and at pH in the range from 5 to 7.6. Under these conditions, the arsenates are completely removed within several minutes of treatment. Among iron-oxide-based nanosystems synthesized and employed in arsenate remediation issues so far, our assembly of iron(III) oxide nanoparticles shows the highest Freundlich adsorption coefficient and equilibrium sorption capacity under conditions maintained. Taking into account simple and low-cost preparation procedure, product high yields, almost monodispersed character, room-temperature superparamagnetic behavior, and strong magnetic response under small applied magnetic fields, the synthesized iron(III) oxide nanoparticles can be regarded as a promising candidate for exploitation in the field of removing undesired toxic pollutants from various real water systems.
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Affiliation(s)
- Martina Kilianová
- Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science, Palacky University, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic
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Prucek R, Ranc V, Kvítek L, Panáček A, Zbořil R, Kolář M. Reproducible discrimination between Gram-positive and Gram-negative bacteria using surface enhanced Raman spectroscopy with infrared excitation. Analyst 2012; 137:2866-70. [DOI: 10.1039/c2an16310a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Prucek R, Tuček J, Kilianová M, Panáček A, Kvítek L, Filip J, Kolář M, Tománková K, Zbořil R. The targeted antibacterial and antifungal properties of magnetic nanocomposite of iron oxide and silver nanoparticles. Biomaterials 2011; 32:4704-13. [PMID: 21507482 DOI: 10.1016/j.biomaterials.2011.03.039] [Citation(s) in RCA: 174] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2011] [Accepted: 03/12/2011] [Indexed: 11/16/2022]
Abstract
Two types of magnetic binary nanocomposites, Ag@Fe(3)O(4) and γ-Fe(2)O(3)@Ag, were synthesized and characterized and their antibacterial activities were tested. As a magnetic component, Fe(3)O(4) (magnetite) nanoparticles with an average size of about 70 nm and monodisperse γ-Fe(2)O(3) (maghemite) nanoparticles with an average size of 5 nm were used. Nanocomposites were prepared via in situ chemical reduction of silver ions by maltose in the presence of particular magnetic phase and molecules of polyacrylate serving as a spacer among iron oxide and silver nanoparticles. In the case of the Ag@Fe(3)O(4) nanocomposite, silver nanoparticles, caught at the surfaces of Fe(3)O(4) nanocrystals, were around 5 nm in a size. On the contrary, in the case of the γ-Fe(2)O(3)@Ag nanocomposite, ultrafine γ-Fe(2)O(3) nanoparticles surrounded silver nanoparticles ranging in a size between 20 and 40 nm. In addition, the molecules of polyacrylate in this nanocomposite type suppress considerably interparticle magnetic interactions as proved by magnetization measurements. Both synthesized nanocomposites exhibited very significant antibacterial and antifungal activities against ten tested bacterial strains (minimum inhibition concentrations (MIC) from 15.6 mg/L to 125 mg/L) and four candida species (MIC from 1.9 mg/L to 31.3 mg/L). Moreover, acute nanocomposite cytotoxicity against mice embryonal fibroblasts was observed at concentrations of higher than 430 mg/L (Ag@Fe(3)O(4)) and 292 mg/L (γ-Fe(2)O(3)@Ag). With respect to the non-cytotoxic nature of the polyacrylate linker, both kinds of silver nanocomposites are well applicable for a targeted magnetic delivery of silver nanoparticles in medicinal and disinfection applications.
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Affiliation(s)
- Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Slechtitelu 11, 78371 Olomouc, Czech Republic.
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Dědková K, Fernández VA, Kvítek L, Prucek R, Panáček A. Study of Antibacterial Activity of Silver NPs Against Animal Pathogens. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/asem.2011.1075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Prucek R, Panáček A, Fargašová A, Ranc V, Mašek V, Kvítek L, Zbořil R. Re-crystallization of silver nanoparticles in a highly concentrated NaCl environment—a new substrate for surface enhanced IR-visible Raman spectroscopy. CrystEngComm 2011. [DOI: 10.1039/c0ce00776e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Prucek R, Kvítek L, Panáček A, Vančurová L, Soukupová J, Jančík D, Zbořil R. Polyacrylate-assisted synthesis of stable copper nanoparticles and copper(I) oxide nanocubes with high catalytic efficiency. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b913561h] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kvítek L, Prucek R, Panáček A, Novotný R, Hrbáč J, Zbořil R. The influence of complexing agent concentration on particle size in the process of SERS active silver colloid synthesis. ACTA ACUST UNITED AC 2005. [DOI: 10.1039/b417007e] [Citation(s) in RCA: 139] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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