1
|
Helios K, Bednarchuk TJ, Wysokiński R, Duczmal M, Wojciechowska A, Łukowiak A, Kędziora A, Małaszczuk M, Michalska D. New isomorphous complexes of Co(II) and Zn(II) with the 5-nitroorotate ligand: Crystal and molecular structures, spectroscopic and DFT studies, magnetic properties and antimicrobial activities. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115830] [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: 10/18/2022]
|
2
|
Chernii S, Gerasymchuk Y, Losytskyy M, Szymański D, Tretyakova I, Łukowiak A, Pekhnyo V, Yarmoluk S, Chernii V, Kovalska V. Modification of insulin amyloid aggregation by Zr phthalocyanines functionalized with dehydroacetic acid derivatives. PLoS One 2021; 16:e0243904. [PMID: 33411832 PMCID: PMC7790233 DOI: 10.1371/journal.pone.0243904] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 12/01/2020] [Indexed: 02/06/2023] Open
Abstract
Amyloid fibrils are widely studied both as target in conformational disorders and as basis for the development of protein-based functional materials. The three Zr phthalocyanines bearing dehydroacetic acid residue (PcZr(L1)2) and its condensed derivatives (PcZr(L2)2 and PcZr(L3)2) as out-of-plane ligands were synthesized and their influence on insulin fibril formation was studied by amyloid-sensitive fluorescent dye based assay, scanning electron microscopy, fluorescent and absorption spectroscopies. The presence of Zr phthalocyanines was shown to modify the fibril formation. The morphology of fibrils formed in the presence of the Zr phthalocyanines differs from that of free insulin and depends on the structure of out-of-plane ligands. It is shown that free insulin mostly forms fibril clusters with the length of about 0.3-2.1 μm. The presence of Zr phthalocyanines leads to the formation of individual 0.4-2.8 μm-long fibrils with a reduced tendency to lateral aggregation and cluster formation (PcZr(L1)2), shorter 0.2-1.5 μm-long fibrils with the tendency to lateral aggregation without clusters (PcZr(L2)2), and fibril-like 0.2-1.0 μm-long structures (PcZr(L3)2). The strongest influence on fibrils morphology made by PcZr(L3)2 could be explained by the additional stacking of phenyl moiety of the ligand with aromatic amino acids in protein. The evidences of binding of studied Zr phthalocyanines to mature fibrils were shown by absorption spectroscopy (for PcZr(L1)2 and PcZr(L2)2) and fluorescent spectroscopy (for PcZr(L3)2). These complexes could be potentially used as external tools allowing the development of functional materials on protein fibrils basis.
Collapse
Affiliation(s)
- Svitlana Chernii
- Institute of Molecular Biology and Genetics, NASU, Kyiv, Ukraine
| | - Yuriy Gerasymchuk
- Institute of Low Temperature and Structure Research, PAS, Wroclaw, Poland
| | | | - Damian Szymański
- Institute of Low Temperature and Structure Research, PAS, Wroclaw, Poland
| | - Iryna Tretyakova
- Institute of General and Inorganic Chemistry, NASU, Kyiv, Ukraine
| | - Anna Łukowiak
- Institute of Low Temperature and Structure Research, PAS, Wroclaw, Poland
| | - Vasyl Pekhnyo
- Institute of General and Inorganic Chemistry, NASU, Kyiv, Ukraine
| | - Sergiy Yarmoluk
- Institute of Molecular Biology and Genetics, NASU, Kyiv, Ukraine
| | - Viktor Chernii
- Institute of General and Inorganic Chemistry, NASU, Kyiv, Ukraine
| | | |
Collapse
|
3
|
Kędziora A, Wernecki M, Korzekwa K, Speruda M, Gerasymchuk Y, Łukowiak A, Bugla-Płoskońska G. Consequences Of Long-Term Bacteria's Exposure To Silver Nanoformulations With Different PhysicoChemical Properties. Int J Nanomedicine 2020; 15:199-213. [PMID: 32021174 PMCID: PMC6970275 DOI: 10.2147/ijn.s208838] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 03/15/2019] [Accepted: 09/18/2019] [Indexed: 02/05/2023] Open
Abstract
Purpose Resistance to antibiotics is a major problem of public health. One of the alternative therapies is silver – more and more popular because of nanotechnology development and new possibilities of usage. As a component of colloid, powder, cream, bandages, etc., nanosilver is often recommended to treat the multidrug-resistant pathogens and we can observe its overuse also outside of the clinic where different physicochemical forms of silver nanoformulations (e.g. size, shape, compounds, surface area) are introduced. In this research, we described the consequences of long-term bacteria exposure to silver nanoformulations with different physicochemical properties, including changes in genome and changes of bacterial sensitivity to silver nanoformulations and/or antibiotics. Moreover, the prevalence of exogenous resistance to silver among multidrug-resistant bacteria was determined. Materials and Methods Gram-negative and Gram-positive bacteria strains are described as sensitive and multidrug-resistant strains. The sensitivity of the tested bacterial strains to antibiotics was carried out with disc diffusion methods. The sensitivity of bacteria to silver nanoformulations and development of bacterial resistance to silver nanoformulations has been verified via determination of the minimal inhibitory concentrations. The presence of sil genes was verified via PCR reaction and DNA electrophoresis. The genomic and phenotypic changes have been verified via genome sequencing and bioinformatics analysis. Results Bacteria after long-term exposure to silver nanoformulations may change their sensitivity to silver forms and/or antibiotics, depending on the physicochemical properties of silver nanoformulations, resulting from phenotypic or genetic changes in the bacterial cell. Finally, adaptants and mutants may become more sensitive or resistant to some antibiotics than wild types. Conclusion Application of silver nanoformulations in the case of multiple resistance or multidrug-resistant bacterial infection can enhance or decrease their resistance to antibiotics. The usage of nanosilver in a clinic and outside of the clinic should be determined and should be under strong control. Moreover, each silver nanomaterial should be considered as a separate agent with a potential different mode of antibacterial action.
Collapse
Affiliation(s)
- Anna Kędziora
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland
| | - Maciej Wernecki
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland
| | - Kamila Korzekwa
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland
| | - Mateusz Speruda
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland
| | - Yuriy Gerasymchuk
- Trzebiatowski Institute of Low Temperature and Structure Research PAS in Wrocław, Wroclaw, Poland
| | - Anna Łukowiak
- Trzebiatowski Institute of Low Temperature and Structure Research PAS in Wrocław, Wroclaw, Poland
| | - Gabriela Bugla-Płoskońska
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland
| |
Collapse
|
4
|
Hanuza J, Godlewska P, Lisiecki R, Ryba-Romanowski W, Kadłubański P, Lorenc J, Łukowiak A, Macalik L, Gerasymchuk Y, Legendziewicz J. DFT study of electron absorption and emission spectra of pyramidal LnPc(OAc) complexes of some lanthanide ions in the solid state. Spectrochim Acta A Mol Biomol Spectrosc 2018; 196:202-208. [PMID: 29454249 DOI: 10.1016/j.saa.2018.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 12/06/2017] [Accepted: 01/03/2018] [Indexed: 06/08/2023]
Abstract
The electron absorption and emission spectra were measured for the pyramidal LnPc(OAc) complexes in the solid state and co-doped in silica glass, where Ln=Er, Eu and Ho. The theoretical electron spectra were determined from the quantum chemical DFT calculation using four approximations CAM-B3LYP/LANL2DZ, CAM-B3LYP/CC-PVDZ, B3LYP/LANL2DZ and B3LYP/CC-PVDZ. It was shown that the best agreement between the calculated and experimental structural parameters and spectroscopic data was reached for the CAM-B3LYP/LANL2DZ model. The emission spectra were measured using the excitations both in the ligand and lanthanide absorption ranges. The possibility of energy transfer between the phthalocyanine ligand and excited states of lanthanide ions was discussed. It was shown that the back energy transfer from metal states to phthalocyanine state is responsible for the observed emission of the studied complexes both in the polycrystalline state and silica glass.
Collapse
Affiliation(s)
- J Hanuza
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - P Godlewska
- Department of Bioorganic Chemistry, Institute of Chemistry and Food Technology, Faculty of Engineering and Economy, Wrocław University of Economics, Poland.
| | - R Lisiecki
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - W Ryba-Romanowski
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - P Kadłubański
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - J Lorenc
- Department of Bioorganic Chemistry, Institute of Chemistry and Food Technology, Faculty of Engineering and Economy, Wrocław University of Economics, Poland
| | - A Łukowiak
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - L Macalik
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - Yu Gerasymchuk
- Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland
| | - J Legendziewicz
- Faculty of Chemistry, Wrocław University, F. Joliot-Curie 14 str., 50-383 Wrocław, Poland
| |
Collapse
|
5
|
Kędziora A, Speruda M, Krzyżewska E, Rybka J, Łukowiak A, Bugla-Płoskońska G. Similarities and Differences between Silver Ions and Silver in Nanoforms as Antibacterial Agents. Int J Mol Sci 2018; 19:E444. [PMID: 29393866 PMCID: PMC5855666 DOI: 10.3390/ijms19020444] [Citation(s) in RCA: 223] [Impact Index Per Article: 37.2] [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: 12/02/2017] [Revised: 01/14/2018] [Accepted: 01/16/2018] [Indexed: 12/15/2022] Open
Abstract
Silver is considered as antibacterial agent with well-known mode of action and bacterial resistance against it is well described. The development of nanotechnology provided different methods for the modification of the chemical and physical structure of silver, which may increase its antibacterial potential. The physico-chemical properties of silver nanoparticles and their interaction with living cells differs substantially from those of silver ions. Moreover, the variety of the forms and characteristics of various silver nanoparticles are also responsible for differences in their antibacterial mode of action and probably bacterial mechanism of resistance. The paper discusses in details the aforementioned aspects of silver activity.
Collapse
Affiliation(s)
- Anna Kędziora
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, 51-148 Wrocław, Poland.
| | - Mateusz Speruda
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, 51-148 Wrocław, Poland.
| | - Eva Krzyżewska
- Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland.
| | - Jacek Rybka
- Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland.
| | - Anna Łukowiak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wrocław, Poland.
| | - Gabriela Bugla-Płoskońska
- Department of Microbiology, Institute of Genetics and Microbiology, University of Wrocław, 51-148 Wrocław, Poland.
| |
Collapse
|
6
|
Ptak M, Pasińska K, Głuchowski P, Łukowiak A, Ciupa A. Structural, optical and phonon properties of formate-based MOF phosphors with ethylammonium cations. Phys Chem Chem Phys 2017; 19:22733-22742. [DOI: 10.1039/c7cp04005a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We report the structural and spectroscopic properties of metal–organic phosphors.
Collapse
Affiliation(s)
- M. Ptak
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| | - K. Pasińska
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| | - P. Głuchowski
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| | - A. Łukowiak
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| | - A. Ciupa
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-950 Wrocław 2
- Poland
| |
Collapse
|
7
|
Tran VH, Głuchowski P, Łukowiak A, Strȩk W. The influence of temperature, pressure and Ag doping on the physical properties of TiO 2 nanoceramics. Nanoscale 2016; 8:19703-19713. [PMID: 27874118 DOI: 10.1039/c6nr06563e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Undoped and Ag-doped TiO2 ceramics have been prepared at temperatures between 500-1000 °C and under pressures up to 8 GPa. Their crystal structures and physical properties were investigated by means of EDX, SEM, TEM, X-ray powder diffraction, and magnetization M, specific heat Cp and electrical resistance ρ measurements. It is found that the anatase-structured As-cast powder transforms into rutile and columbite-type at 500 °C and 5.5 GPa. The stabilization of the latter phase is fulfilled under a pressure of 8 GPa and at temperatures above 800 °C. On the basis of experimental results, we conclude that the physical properties of TiO2 can be tailored along with its crystal structure. In particular, magnetic properties change from paramagnetic in anatase and rutile to magnetic correlations and in all likelihood magnetic-field-induced antiferromagnetic short-range order in columbite-structured TiO2. Contrasting behaviour in the temperature dependences of specific heat between anatase/rutile and columbite-type TiO2 is obvious. Differently from anatase/rutile, the Cp of columbite-type TiO2 exhibits a low-temperature excess, being interpreted as due to magnetic correlations, or else the prevalence of soft modes. An analysis of ρ(T) for columbite-type TiO2 in the temperature range of 280-400 K reveals the presence of a new trapping state at an energy level of ∼28 meV within the originally forbidden gap. Furthermore, thermal fluctuation-induced tunnelling and hopping conductivities are suggested to govern in a lower temperature range. We recognize that the Ag-doped contents do not alter the crystal structure but considerably enhance magnetic correlations, compared to undoped samples.
Collapse
Affiliation(s)
- V H Tran
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wrocław, Poland.
| | - P Głuchowski
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wrocław, Poland.
| | - A Łukowiak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wrocław, Poland.
| | - W Strȩk
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wrocław, Poland.
| |
Collapse
|
8
|
Hreniak D, Bettinelli M, Speghini A, Łukowiak A, Głuchowski P, Wiglusz R. The f-f emission of Pr3+ ion as an optical probe for the structural properties of YAG nanoceramics. J Nanosci Nanotechnol 2009; 9:6315-6319. [PMID: 19908528 DOI: 10.1166/jnn.2009.1464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Transparent Pr-doped YAG nanoceramics composed of grains with an average size of about 42 nm, were fabricated with the Low Temperature High Pressure (LTHP) sintering technique using the corresponding nanopowders as the starting materials. The structure of the nanoceramics was analyzed by X-ray diffraction (XRD). The effect of the sintering conditions on the structural properties is discussed on the basis of the changes of the spectroscopic properties of Pr3+ ions. In particular, the intensities and decays of the emission transitions originating from the (3)P0 and (1)D2 levels are investigated and correlated with structural properties of the material, such as microstrains produced by the high-pressure process.
Collapse
Affiliation(s)
- Dariusz Hreniak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, PL-50-422 Wroclaw, Poland
| | | | | | | | | | | |
Collapse
|