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Barta A, Cebova M, Kovac A, Koneracka M, Zavisova V, Pechanova O. Aliskiren-Loaded Nanoparticles Downregulate (Pro)renin Receptor and ACE Gene Expression in the Heart of Spontaneously Hypertensive Rats: Effect on NADPH Oxidase. Int J Mol Sci 2024; 25:846. [PMID: 38255922 PMCID: PMC10815459 DOI: 10.3390/ijms25020846] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/29/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
We aimed to determine effects of aliskiren, a direct renin inhibitor, loaded onto polymeric nanoparticles on the (pro)renin receptor (Atp6ap2), angiotensin II type 1 receptor (Agtr1), and angiotensin-converting enzyme (ACE) gene expression in the heart of spontaneously hypertensive rats (SHR). Twelve-week-old male SHRs were divided into an untreated group and groups treated with powdered aliskiren or aliskiren-loaded nanoparticles (25 mg/kg/day). After three weeks, the accumulation of aliskiren, distribution of polymeric nanoparticles, gene expression of Atp6ap2 and Agtr1 receptors and ACE, and protein expression of NADPH oxidase along with the conjugated diene (CD) concentration were analyzed. The accumulation of aliskiren in the heart was higher in the aliskiren-loaded nanoparticle group than in the powdered group. The fluorescent signals of nanoparticles were visible in cardiomyocytes, vessel walls, and erythrocytes. Aliskiren-loaded nanoparticles decreased the gene expression of Atp6ap2 and ACE, while not affecting Agtr1. Both forms of aliskiren decreased the protein expression of NADPH oxidase, with a more pronounced effect observed in the aliskiren-loaded nanoparticle group. CD concentration was decreased only in the aliskiren-loaded nanoparticle group. We hypothesize that aliskiren-loaded nanoparticle-mediated downregulation of Atp6ap2 and ACE may contribute to a decrease in ROS generation with beneficial effects in the heart. Moreover, polymeric nanoparticles may represent a promising tool for targeted delivery of aliskiren.
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Affiliation(s)
- Andrej Barta
- Institute of Normal and Pathological Physiology, Centre of Experimental Medicine, Slovak Academy of Sciences, 813 71 Bratislava, Slovakia; (A.B.); (M.C.)
| | - Martina Cebova
- Institute of Normal and Pathological Physiology, Centre of Experimental Medicine, Slovak Academy of Sciences, 813 71 Bratislava, Slovakia; (A.B.); (M.C.)
| | - Andrej Kovac
- Institute of Neuroimunology, Slovak Academy of Sciences, 813 71 Bratislava, Slovakia;
| | - Martina Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia; (M.K.); (V.Z.)
| | - Vlasta Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia; (M.K.); (V.Z.)
| | - Olga Pechanova
- Institute of Normal and Pathological Physiology, Centre of Experimental Medicine, Slovak Academy of Sciences, 813 71 Bratislava, Slovakia; (A.B.); (M.C.)
- Institute of Pathophysiology, Faculty of Medicine, Comenius University, 811 08 Bratislava, Slovakia
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2
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Kubovcikova M, Sobotova R, Zavisova V, Antal I, Khmara I, Lisnichuk M, Bednarikova Z, Jurikova A, Strbak O, Vojtova J, Mikolka P, Gombos J, Lokajova A, Gazova Z, Koneracka M. N-Acetylcysteine-Loaded Magnetic Nanoparticles for Magnetic Resonance Imaging. Int J Mol Sci 2023; 24:11414. [PMID: 37511170 PMCID: PMC10380599 DOI: 10.3390/ijms241411414] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a life-threatening condition characterized by the rapid onset of lung inflammation Therefore, monitoring the spatial distribution of the drug directly administered to heterogeneously damaged lungs is desirable. In this work, we focus on optimizing the drug N-acetylcysteine (NAC) adsorption on poly-l-lysine-modified magnetic nanoparticles (PLLMNPs) to monitor the drug spatial distribution in the lungs using magnetic resonance imaging (MRI) techniques. The physicochemical characterizations of the samples were conducted in terms of morphology, particle size distributions, surface charge, and magnetic properties followed by the thermogravimetric quantification of NAC coating and cytotoxicity experiments. The sample with the theoretical NAC loading concentration of 0.25 mg/mL was selected as an optimum due to the hydrodynamic nanoparticle size of 154 nm, the surface charge of +32 mV, good stability, and no cytotoxicity. Finally, MRI relaxometry confirmed the suitability of the sample to study the spatial distribution of the drug in vivo using MRI protocols. We showed the prevailing transverse relaxation with high transverse relaxivity values and a high r2(*)/r1 ratio, causing visible hypointensity in the final MRI signal. Furthermore, NAC adsorption significantly affects the relaxation properties of PLLMNPs, which can help monitor drug release in vitro/in vivo.
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Affiliation(s)
- Martina Kubovcikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Radka Sobotova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Vlasta Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Iryna Antal
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Iryna Khmara
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Maksym Lisnichuk
- Faculty of Science, Pavol Jozef Safarik University, Park Angelinum 9, 04001 Kosice, Slovakia
| | - Zuzana Bednarikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Alena Jurikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Oliver Strbak
- Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Jana Vojtova
- Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Pavol Mikolka
- Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Jan Gombos
- Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Alica Lokajova
- Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Zuzana Gazova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Martina Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
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Antal I, Strbak O, Zavisova V, Vojtova J, Kubovcikova M, Jurikova A, Khmara I, Girman V, Džunda R, Kovaľ K, Koneracka M. Development of Positively Charged Poly-L-Lysine Magnetic Nanoparticles as Potential MRI Contrast Agent. Nanomaterials (Basel) 2023; 13:1831. [PMID: 37368261 DOI: 10.3390/nano13121831] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/28/2023]
Abstract
A colloidal solution of magnetic nanoparticles (MNPs) modified with biocompatible positively charged poly-L-lysine (PLL) with an oleate (OL) layer employed as an initial coating was produced as a potential MRI contrast agent. The effect of various PLL/MNPs' mass ratios on the samples' hydrodynamic diameter, zeta potential, and isoelectric point (IEP) was studied by the dynamic light-scattering method. The optimal mass ratio for MNPs' surface coating was 0.5 (sample PLL0.5-OL-MNPs). The average hydrodynamic particle size in the sample of PLL0.5-OL-MNPs was 124.4 ± 1.4 nm, and in the PLL-unmodified nanoparticles, it was 60.9 ± 0.2 nm, indicating that the OL-MNPs' surface became covered by PLL. Next, the typical characteristics of the superparamagnetic behavior were observed in all samples. In addition, the decrease in saturation magnetizations from 66.9 Am2/kg for MNPs to 35.9 and 31.6 Am2/kg for sample OL-MNPs and PLL0.5-OL-MNPs also confirmed successful PLL adsorption. Moreover, we show that both OL-MNPs and PLL0.5-OL-MNPs exhibit excellent MRI relaxivity properties and a very high r2(*)/r1 ratio, which is very desirable in biomedical applications with required MRI contrast enhancement. The PLL coating itself appears to be the crucial factor in enhancing the relaxivity of MNPs in MRI relaxometry.
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Affiliation(s)
- Iryna Antal
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Oliver Strbak
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Vlasta Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Jana Vojtova
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 03601 Martin, Slovakia
| | - Martina Kubovcikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Alena Jurikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Iryna Khmara
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Vladimir Girman
- Institute of Physics, Faculty of Sciences, Pavol Jozef Safarik University in Kosice, Park Angelinum 9, 04154 Kosice, Slovakia
| | - Róbert Džunda
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Karol Kovaľ
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
| | - Martina Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
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Antal I, Koneracka M, Kubovcikova M, Zavisova V, Jurikova A, Khmara I, Omastova M, Micusik M, Barathova M, Jelenska L, Kajanova I, Zatovicova M, Pastorekova S. Targeting of carbonic anhydrase IX-positive cancer cells by glycine-coated superparamagnetic nanoparticles. Colloids Surf B Biointerfaces 2021; 205:111893. [PMID: 34116397 DOI: 10.1016/j.colsurfb.2021.111893] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/28/2020] [Revised: 05/17/2021] [Accepted: 05/30/2021] [Indexed: 11/16/2022]
Abstract
Antibody-modified magnetic nanoparticles were prepared to study their cellular uptake in 3D multicellular spheroidal cell cultures. For this purpose, carbonic anhydrase IX specific monoclonal antibody VII/20 was selected to conjugate on the surface of positively charged glycine coated magnetic nanoparticles in a form of a stable magnetic fluid. In this work, glycine-functionalized magnetic nanoparticles were characterized by different methods. X-ray photoelectron analysis confirmed the binding of glycine to the magnetic nanoparticles, and quantification of the glycine coating on the surface of the magnetic nanoparticles was conducted by thermogravimetric analysis. The optimal weight ratio of glycine to magnetic nanoparticles was determined to be 5 showing good colloid stability due to the high surface charge density of protonated glycine coating shown by the great zeta potential (⁓40 mV). The antibody conjugation to the functionalized magnetic nanoparticles was performed at an antibody to magnetic nanoparticles weight ratio equal to 0.5. Applications of antibody-modified magnetic nanoparticles in cancer therapy rely on their ability to specifically target cancer tissues and enter the tumour intracellular space. Here, we show that antibody coupled nanoparticle internalization was triggered by selective binding to tumour cells expressing hypoxic marker carbonic anhydrase IX. Moreover, our results confirmed specific penetration of conjugated nanoparticles into the tumour cell spheroids.
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Affiliation(s)
- Iryna Antal
- Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, Kosice, Slovakia
| | - Martina Koneracka
- Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, Kosice, Slovakia.
| | - Martina Kubovcikova
- Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, Kosice, Slovakia
| | - Vlasta Zavisova
- Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, Kosice, Slovakia
| | - Alena Jurikova
- Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, Kosice, Slovakia
| | - Iryna Khmara
- Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, Kosice, Slovakia
| | - Maria Omastova
- Polymer Institute Slovak Academy of Sciences, Dubravska cesta 9, 845 41, Bratislava 45, Slovakia
| | - Matej Micusik
- Polymer Institute Slovak Academy of Sciences, Dubravska cesta 9, 845 41, Bratislava 45, Slovakia
| | - Monika Barathova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 05, Bratislava, Slovakia
| | - Lenka Jelenska
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 05, Bratislava, Slovakia
| | - Ivana Kajanova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 05, Bratislava, Slovakia
| | - Miriam Zatovicova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 05, Bratislava, Slovakia
| | - Silvia Pastorekova
- Institute of Virology, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 05, Bratislava, Slovakia
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Svitkova B, Zavisova V, Nemethova V, Koneracka M, Kretova M, Razga F, Ursinyova M, Gabelova A. Differences in surface chemistry of iron oxide nanoparticles result in different routes of internalization. Beilstein J Nanotechnol 2021; 12:270-281. [PMID: 33842184 PMCID: PMC8008094 DOI: 10.3762/bjnano.12.22] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
The efficient entry of nanotechnology-based pharmaceuticals into target cells is highly desired to reach high therapeutic efficiency while minimizing the side effects. Despite intensive research, the impact of the surface coating on the mechanism of nanoparticle uptake is not sufficiently understood yet. Herein, we present a mechanistic study of cellular internalization pathways of two magnetic iron oxide nanoparticles (MNPs) differing in surface chemistry into A549 cells. The MNP uptake was investigated in the presence of different inhibitors of endocytosis and monitored by spectroscopic and imaging techniques. The results revealed that the route of MNP entry into cells strongly depends on the surface chemistry of the MNPs. While serum bovine albumin-coated MNPs entered the cells via clathrin-mediated endocytosis (CME), caveolin-mediated endocytosis (CavME) or lipid rafts were preferentially involved in the internalization of polyethylene glycol-coated MNPs. Our data indicate that surface engineering can contribute to an enhanced delivery efficiency of nanoparticles.
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Affiliation(s)
- Barbora Svitkova
- Cancer Research Institute, Biomedical Research Center of the Slovak Academy of Sciences, Dubravska cesta 9, 845 05 Bratislava, Slovakia
| | - Vlasta Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
| | - Veronika Nemethova
- Faculty of Medicine, Comenius University, Spitalska 24, 813 72 Bratislava, Slovakia
- Selecta Biotech SE, Istrijska 20, 841 07 Bratislava, Slovakia
| | - Martina Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
| | - Miroslava Kretova
- Cancer Research Institute, Biomedical Research Center of the Slovak Academy of Sciences, Dubravska cesta 9, 845 05 Bratislava, Slovakia
| | - Filip Razga
- Faculty of Medicine, Comenius University, Spitalska 24, 813 72 Bratislava, Slovakia
- Selecta Biotech SE, Istrijska 20, 841 07 Bratislava, Slovakia
| | - Monika Ursinyova
- Slovak Medical University, Limbova 12, 833 03 Bratislava, Slovakia
| | - Alena Gabelova
- Cancer Research Institute, Biomedical Research Center of the Slovak Academy of Sciences, Dubravska cesta 9, 845 05 Bratislava, Slovakia
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Antal I, Strbak O, Khmara I, Koneracka M, Kubovcikova M, Zavisova V, Kmetova M, Baranovicova E, Dobrota D. MRI Relaxivity Changes of the Magnetic Nanoparticles Induced by Different Amino Acid Coatings. Nanomaterials (Basel) 2020; 10:nano10020394. [PMID: 32102280 PMCID: PMC7075310 DOI: 10.3390/nano10020394] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 12/30/2019] [Revised: 02/15/2020] [Accepted: 02/18/2020] [Indexed: 12/18/2022]
Abstract
In this study, we analysed the physico-chemical properties of positively charged magnetic fluids consisting of magnetic nanoparticles (MNPs) functionalised by different amino acids (AAs): glycine (Gly), lysine (Lys) and tryptophan (Trp), and the influence of AA-MNP complexes on the MRI relaxivity. We found that the AA coating affects the size of dispersed particles and isoelectric point, as well as the zeta potential of AA-MNPs differently, depending on the AA selected. Moreover, we showed that a change in hydrodynamic diameter results in a change to the relaxivity of AA-MNP complexes. On the one hand, we observed a decrease in the relaxivity values, r1 and r2, with an increase in hydrodynamic diameter (the relaxivity of r1 and r2 were comparable with commercially available contrast agents); on the other hand, we observed an increase in r2* value with an increase in hydrodynamic size. These findings provide an interesting preliminary look at the impact of AA coating on the relaxivity properties of AA-MNP complexes, with a specific application in molecular contrast imaging originating from magnetic nanoparticles and magnetic resonance techniques.
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Affiliation(s)
- Iryna Antal
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; (I.A.); (I.K.); (M.K.); (M.K.); (V.Z.)
| | - Oliver Strbak
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 036 01 Martin, Slovakia;
- Correspondence: ; Tel.: +421-43-2633448
| | - Iryna Khmara
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; (I.A.); (I.K.); (M.K.); (M.K.); (V.Z.)
| | - Martina Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; (I.A.); (I.K.); (M.K.); (M.K.); (V.Z.)
| | - Martina Kubovcikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; (I.A.); (I.K.); (M.K.); (M.K.); (V.Z.)
| | - Vlasta Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia; (I.A.); (I.K.); (M.K.); (M.K.); (V.Z.)
| | - Martina Kmetova
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 036 01 Martin, Slovakia; (M.K.); (D.D.)
| | - Eva Baranovicova
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 036 01 Martin, Slovakia;
| | - Dusan Dobrota
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala Hora 4, 036 01 Martin, Slovakia; (M.K.); (D.D.)
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Antosova A, Bednarikova Z, Koneracka M, Antal I, Marek J, Kubovcikova M, Zavisova V, Jurikova A, Gazova Z. Amino Acid Functionalized Superparamagnetic Nanoparticles Inhibit Lysozyme Amyloid Fibrillization. Chemistry 2019; 25:7501-7514. [DOI: 10.1002/chem.201806262] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Indexed: 02/05/2023]
Affiliation(s)
- Andrea Antosova
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Zuzana Bednarikova
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Martina Koneracka
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Iryna Antal
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Jozef Marek
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Martina Kubovcikova
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Vlasta Zavisova
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Alena Jurikova
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
| | - Zuzana Gazova
- Institute of Experimental Physics Slovak Academy Science Watsonova 47 040 01 Kosice Slovakia
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Antal I, Koneracka M, Kubovcikova M, Zavisova V, Khmara I, Lucanska D, Jelenska L, Vidlickova I, Zatovicova M, Pastorekova S, Bugarova N, Micusik M, Omastova M, Kopcansky P. d,l-lysine functionalized Fe3O4 nanoparticles for detection of cancer cells. Colloids Surf B Biointerfaces 2018; 163:236-245. [DOI: 10.1016/j.colsurfb.2017.12.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/29/2017] [Accepted: 12/11/2017] [Indexed: 11/17/2022]
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Mahmood A, Kavungal V, Ahmed SS, Kopcansky P, Zavisova V, Farrell G, Semenova Y. Magnetic field sensing using whispering-gallery modes in a cylindrical microresonator infiltrated with ferronematic liquid crystal. Opt Express 2017; 25:12195-12202. [PMID: 28786578 DOI: 10.1364/oe.25.012195] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 11/24/2016] [Indexed: 06/07/2023]
Abstract
An all-fiber magnetic field sensor based on whispering-gallery modes (WGM) in a fiber micro-resonator infiltrated with ferronematic liquid crystal is proposed and experimentally demonstrated. The cylindrical microresonator is formed by a 1 cm-long section of a photonic crystal fiber infiltrated with ferronematic materials. Both ferronematics suspensions are prepared based on the nematic liquid crystal 1-(trans-4-Hexylcyclohexyl)-4-isothiocyanatobenzene (6CHBT) doped with rod-like magnetic particles in the first case and with spherical magnetic particles in the second case. WGMs are excited in the fiber microresonator by evanescent light coupling using a tapered fiber with a micron-size diameter. The Q-factor of the microresonator determined from the experimentaly measured transmission spectrum of the tapered fiber was 1.975 × 103. Under the influence of an applied magnetic field the WGM resonances experience spectral shift towards shorter wavelengths. The experimentally demonstrated sensitivity of the proposed sensor was -39.6 pm/mT and -37.3 pm/mT for samples infiltrated with rod like and spherical like ferromagnetic suspensions respectively for a magnetic field range (0-47) mT. Reducing the diameter of the cylindrical micro-resonator by tapering leads to enhancement of the magnetic field sensitivity up to -61.86 pm/mT and -49.88 pm/mT for samples infiltrated with rod like and spherical like ferromagnetic suspensions respectively for the magnetic field range (0-44.7) mT.
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Antal I, Koneracka M, Zavisova V, Kubovcikova M, Kormosh Z, Kopcansky P. Statins Determination: A Review of Electrochemical Techniques. Crit Rev Anal Chem 2017; 47:474-489. [DOI: 10.1080/10408347.2017.1332973] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- I. Antal
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
- Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
| | - M. Koneracka
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - V. Zavisova
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - M. Kubovcikova
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - Zh. Kormosh
- Lesya Ukrainka Eastern European National University, Lutsk, Ukraine
| | - P. Kopcansky
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
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Siposova K, Bystrenova E, Antosova A, Koneracka M, Zavisova V, Kopcansky P, Gazova Z. Attenuation of the insulin amyloid aggregation in presence of Fe3O4-based magnetic fluids. Gen Physiol Biophys 2013; 32:209-14. [DOI: 10.4149/gpb_2013022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 10/15/2012] [Indexed: 11/08/2022]
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Mesarosova M, Ciampor F, Zavisova V, Koneracka M, Ursinyova M, Kozics K, Tomasovicova N, Hashim A, Vavra I, Krizanova Z, Husekova Z, Kubovcikova M, Kopcansky P, Timko M, Gabelova A. The intensity of internalization and cytotoxicity of superparamagnetic iron oxide nanoparticles with different surface modifications in human tumor and diploid lung cells. Neoplasma 2012; 59:584-97. [PMID: 22668025 DOI: 10.4149/neo_2012_075] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The human lung adenocarcinoma epithelial (A549) cells and the human embryo lung (HEL 12469) cells were used to investigate the uptake and cytotoxicity of magnetite nanoparticles (MNPs) with different chemically modified surfaces. MNPs uptake was an energy-dependent process substantially affected by the serum concentration in the culture medium. Internalized MNPs localized in vesicle-bound aggregates were observed in the cytoplasm, none in the nucleus or in mitochondria. All MNPs induced a dose- and time-dependent increase in cytotoxicity in both human lung cell lines. The cytotoxicity of MNPs increased proportionally with the particle size. Since the cytotoxicity of MNPs was nearly identical when the doses were equalized based on particle surface area, we suppose that the particle surface area rather than the surface modifications per se underlay the cytotoxicity of MNPs. In general, higher internalized amount of MNPs was found in HEL 12469 cells compared with A549 cells. Accordingly, the viability of the human embryo lung cells was reduced more substantially than that of the adenocarcinoma lung cells. The weak MNPs uptake into A549 cells might be of biomedical relevance in cases where MNPs should be used as nanocarriers for targeted drug delivery in tumor tissue derived from alveolar epithelial cells.
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Affiliation(s)
- M Mesarosova
- Cancer Research Institute, SAS, Vlárska 7, 833 91 Bratislava, Slovakia
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13
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Siposova K, Kubovcikova M, Bednarikova Z, Koneracka M, Zavisova V, Antosova A, Kopcansky P, Daxnerova Z, Gazova Z. Depolymerization of insulin amyloid fibrils by albumin-modified magnetic fluid. Nanotechnology 2012; 23:055101. [PMID: 22238252 DOI: 10.1088/0957-4484/23/5/055101] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Pathogenesis of amyloid-related diseases is associated with the presence of protein amyloid deposits. Insulin amyloids have been reported in a patient with diabetes undergoing treatment by injection of insulin and causes problems in the production and storage of this drug and in pplication of insulin pumps. We have studied the interference of insulin amyloid fibrils with a series of 18 albumin magnetic fluids (MFBSAs) consisting of magnetite nanoparticles modified by different amounts of bovine serum albumin (w/w BSA/Fe₃O₄ from 0.005 up to 15). We have found that MFBSAs are able to destroy amyloid fibrils in vitro. The extent of fibril depolymerization was affected by nanoparticle physical-chemical properties (hydrodynamic diameter, zeta potential and isoelectric point) determined by the BSA amount present in MFBSAs. The most effective were MFBSAs with lower BSA/Fe₃O₄ ratios (from 0.005 to 0.1) characteristic of about 90% depolymerizing activity. For the most active magnetic fluids (ratios 0.01 and 0.02) the DC50 values were determined in the range of low concentrations, indicating their ability to interfere with insulin fibrils at stoichiometric concentrations. We assume that the present findings represent a starting point for the application of the active MFBSAs as therapeutic agents targeting insulin amyloidosis.
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Affiliation(s)
- Katarina Siposova
- Department of Biophysics, Department of Magnetism, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia
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14
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Avdeev MV, Feoktystov AV, Kopcansky P, Lancz G, Garamus VM, Willumeit R, Timko M, Koneracka M, Zavisova V, Tomasovicova N, Jurikova A, Csach K, Bulavin LA. Structure of water-based ferrofluids with sodium oleate and polyethylene glycol stabilization by small-angle neutron scattering: contrast-variation experiments. J Appl Crystallogr 2010. [DOI: 10.1107/s0021889810025379] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Contrast variation in small-angle neutron scattering (SANS) experiments is used to compare the structures of a water-based ferrofluid, where magnetite nanoparticles are stabilized by sodium oleate, and its mixture with biocompatible polyethylene glycol, PEG. The basic functions approach is applied, which takes into account the effects of polydispersity and magnetic scattering. Different types of stable aggregates of colloidal particles are revealed in both fluids. The addition of PEG results in a reorganization of the structure of the aggregates: the initial comparatively small and compact aggregates (about 40 nm in size) are replaced by large (more than 120 nm in size) fractal-type structures. It is postulated that these large structures are composed of single magnetite particles coated with PEG, which replaces sodium oleate. Micelle formation involving free sodium oleate is observed in both fluids. The structures of the fluids remain unchanged with increasing temperature up to 343 K. New and specific possibilities of SANS contrast variation with respect to multicomponent systems with different aggregates are considered.
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Cavallini M, Bystrenova E, Timko M, Koneracka M, Zavisova V, Kopcansky P. Multiple-length-scale patterning of magnetic nanoparticles by stamp assisted deposition. J Phys Condens Matter 2008; 20:204144. [PMID: 21694273 DOI: 10.1088/0953-8984/20/20/204144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Control of the size and spatial distribution of materials at multiple length scales is one of the most compelling issues in nanotechnology research. We report a multiple-length-scale patterning of pure magnetic particles as well as biocompatible magnetic particles based on a printing technique named micro-injection molding in capillaries. The magnetic particles were prepared by a technique of co-precipitation of ferric and ferrous salts in an alkali medium. We demonstrate that the morphology and the size of the patterning nanoparticles can be controlled by simply controlling the concentration of the solution. Our method exploits the self-organization of the nanoparticles in a solution confined between a stamp and the surfaces of a substrate, exploiting confinement and competing interactions between the adsorbate and the substrate. Our approach represents a remarkable example of an integrated top-down/bottom-up process.
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Affiliation(s)
- M Cavallini
- CNR-ISMN, Via Gobetti 101, 40129 Bologna, Italy
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