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Matijević M, Žakula J, Korićanac L, Radoičić M, Liang X, Mi L, Tričković JF, Šobot AV, Stanković MN, Nakarada Đ, Mojović M, Petković M, Stepić M, Nešić MD. Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO 2 nanoparticles. Photochem Photobiol Sci 2021; 20:1087-1098. [PMID: 34398442 DOI: 10.1007/s43630-021-00082-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/30/2021] [Indexed: 10/20/2022]
Abstract
In this study, C-doped TiO2 nanoparticles (C-TiO2) were prepared and tested as a photosensitizer for visible-light-driven photodynamic therapy against cervical cancer cells (HeLa). X-ray diffraction and Transmission Electron Microscopy confirmed the anatase form of nanoparticles, spherical shape, and size distribution from 5 to 15 nm. Ultraviolet-visible light spectroscopy showed that C doping of TiO2 enhances the optical absorption in the visible light range caused by a bandgap narrowing. The photo-cytotoxic activity of C-TiO2 was investigated in vitro against HeLa cells. The lack of dark cytotoxicity indicates good biocompatibility of C-TiO2. In contrast, a combination with blue light significantly reduced the survival of HeLa cells: illumination only decreased cell viability by 30% (15 min of illumination, 120 µW power), and 60% when HeLa cells were preincubated with C-TiO2. We have also confirmed blue light-induced C-TiO2-catalyzed generation of reactive oxygen species in vitro and intracellularly. Oxidative stress triggered by C-TiO2/blue light was the leading cause of HeLa cell death. Fluorescent labeling of treated HeLa cells showed distinct morphological changes after the C-TiO2/blue light treatment. Unlike blue light illumination, which caused the appearance of large necrotic cells with deformed nuclei, cytoplasm swelling, and membrane blebbing, a combination of C-TiO2/blue light leads to controlled cell death, thus providing a better outcome of local anticancer therapy.
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Affiliation(s)
- Milica Matijević
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia.
| | - Jelena Žakula
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Lela Korićanac
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Marija Radoičić
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Xinyue Liang
- Department of Optical Science and Engineering, Fudan University, 200433, Shanghai, People's Republic of China
| | - Lan Mi
- Department of Optical Science and Engineering, Fudan University, 200433, Shanghai, People's Republic of China
| | - Jelena Filipović Tričković
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Ana Valenta Šobot
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Maja N Stanković
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, 18000, Niš, Serbia
| | - Đura Nakarada
- Faculty of Physical Chemistry, University of Belgrade, 11000, Belgrade, Serbia
| | - Miloš Mojović
- Faculty of Physical Chemistry, University of Belgrade, 11000, Belgrade, Serbia
| | - Marijana Petković
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Milutin Stepić
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
| | - Maja D Nešić
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11001, Belgrade, Serbia
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Joksić G, Filipović Tričković J, Mićić M, Joksić I, Valenta Šobot A, Demajo M. Optimization of the method for isolation of epithelial cells from the non-glandular part of the rat stomach for flow cytometry. VET ARHIV 2020. [DOI: 10.24099/vet.arhiv.0956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Traditional methods in cell proliferation studies are based on immunohistochemical detection of proliferating cells in the target tissue. Since they are time consuming, optimization of novel, more efficient methods is important for large scale proliferation studies. In this study, we aimed to optimize the isolation of single epithelial rat forestomach cells for flow cytometry. As a marker of cellular proliferation we used the Ki-67 antibody to detect this nuclear protein expressed in proliferating cells. We also performed immunohistochemical detection of Ki-67 positive cells and propidium iodide staining to validate the results. 3-tert- butyl -4-hydroxyanisole was used as the positive control to ensure cellular proliferation. The results showed that isolation of epithelial cells with collagenase, trypsin and cell strainer ensures great cell viability (>95%) and the purity of the samples. Flow cytometry and immunostaining with the Ki-67 antibody indicated that 3-tert- butyl-4-hydroxyanisole treatment leads to a significant increase in proliferation. A significant positive correlation was observed between the results obtained by immunohistochemistry and flow cytometry, but the flow cytometric data had a smaller measurement error, suggesting the equal sensitivity and greater accuracy of this method. Propidium iodide staining showed that the percentage of cells in the G2+S phase of the cell cycle correlated positively with the percentage of Ki-67 positive cells assessed by flow cytometry, indicating that Ki-67 positive cells reflect an active dividing cell pool. We conclude that the isolation of forestomach epithelial cells described is a simple and reliable method for obtaining viable cells for use in flow cytometry. Compared to immunohistochemistry, flow cytometric detection of the Ki-67 antigen is equally sensitive, but much faster and provides more accurate results.
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Joksic G, Šobot AV, Trickovic JF, Maletic D, Puac N, Malovic G, Petrovic ZL, Lazovic S. Apoptosis Time Window Induced by Cold Atmospheric Plasma:Comparison with Ionizing Radiation. CURR SCI INDIA 2019. [DOI: 10.18520/cs/v116/i7/1229-1233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Joksić G, Mićić M, Filipović J, Drakulić D, Stanojlović M, Čalija B, Valenta Šobot A, Demajo M, Nilsson R. Cell proliferation assay – method optimisation for in vivo labeling of DNA in the rat forestomach. ACTA VET-BEOGRAD 2017. [DOI: 10.1515/acve-2017-0001] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
The study of cell proliferation is a useful tool in the fields of toxicology, pathophysiology and pharmacology. Cell proliferation and its degree can be evaluated using 5-bromo-2′-deoxyuridine which is incorporated into the newly synthesized DNA. The aim of this study was the optimization of subcutaneous application of 5-bromo-2′-deoxyuridine implantation for continuous and persistent marking of proliferating cells in the rat forestomach. 3-tert-Butyl-4-hydroxyanisole was used as the agent that ensures cell proliferation. In order to determine the optimal dose for proliferating cells labeling, 5-bromo-2′-deoxyuridine doses of 50 mg, 100 mg, 200 mg or 350 mg were implemented 2 days prior to sacrifice by flat-faced cylindrical matrices. Immunohistochemical analysis using 5-bromo-2′-deoxyuridine in situ detection kit was performed for the detection of 5-bromo-2′-deoxyuridine labeled cells. The results showed that for adult rats, the optimum 5-bromo-2′-deoxyuridine dose is 200 mg per animal for subcutaneous application. The here described manner of 5-bromo-2′-deoxyuridine in vivo labeling provides a simple, efficient, and reliable method for cell labeling, and at the same minimizes stress to animals.
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Affiliation(s)
- Gordana Joksić
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Mileva Mićić
- Institute for Medical Research, University of Belgrade, Dr. Subotića Street 4, 11129 Belgrade, Serbia
| | - Jelena Filipović
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Dunja Drakulić
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Miloš Stanojlović
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Bojan Čalija
- Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11221 Belgrade, Serbia
| | - Ana Valenta Šobot
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Miroslav Demajo
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Robert Nilsson
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
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Joksić G, Stašić J, Filipović J, Šobot AV, Trtica M. Size of silver nanoparticles determines proliferation ability of human circulating lymphocytes in vitro. Toxicol Lett 2016; 247:29-34. [DOI: 10.1016/j.toxlet.2016.02.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 10/22/2022]
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Nilsson R, Mićić M, Filipović J, Šobot AV, Drakulić D, Stanojlović M, Joksiċ G. Inhibition by blueberries (bilberries) and extract from milk thistle of rat forestomach hyperplasia induced by oral smokeless tobacco (Swedish snus). Regul Toxicol Pharmacol 2016; 76:94-101. [PMID: 26828024 DOI: 10.1016/j.yrtph.2016.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/20/2016] [Accepted: 01/25/2016] [Indexed: 01/30/2023]
Abstract
The aim of this study was to identify palatable additives which have a significant protective action against soft tissue changes in the oral cavity caused by Swedish smokeless tobacco ("snus"), and that satisfy existing legal requirements. Although the cancer risk from snus is extremely low, long term use may result in highly undesirable keratotic lesions and associated epithelial abnormalities in the oral cavity. The rat forestomach, which is vulnerable to the irritative action of non-genotoxic compounds like butylated hydroxyanisole, propionic acid as well as snus, was chosen as an experimental model. Studied toxicological endpoints included histopathology and cellular proliferation based on DNA incorporation of bromodeoxyuridine. After 6 weeks' exposure, blueberries (bilberries) and an extract from the common milk thistle were found to exert a highly significant inhibition of cell proliferation induced by snus in the rat forestomach epithelium, indicating a potential protection with respect soft tissue changes in the human oral cavity.
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Affiliation(s)
- Robert Nilsson
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia.
| | - Mileva Mićić
- Institute for Medical Investigation, University of Belgrade, Serbia
| | - Jelena Filipović
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Ana Valenta Šobot
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Dunja Drakulić
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Miloš Stanojlović
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Gordana Joksiċ
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
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