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Hegedus C, Andronie L, Uiuiu P, Jurco E, Lazar EA, Popescu S. Pets, Genuine Tools of Environmental Pollutant Detection. Animals (Basel) 2023; 13:2923. [PMID: 37760323 PMCID: PMC10525180 DOI: 10.3390/ani13182923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/10/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
In a shared environment, our companion animals became unintended sentinels for pollutant exposure consequences, developing even earlier similar conditions to humans. This review focused on the human-pet cohabitation in an environment we all share. Alongside other species, canine and feline companions are veritable models in human medical research. The latency period for showing chronic exposure effects to pollutants is just a few years in them, compared to considerably more, decades in humans. Comparing the serum values of people and their companion animals can, for example, indicate the degree of poisonous lead load we are exposed to and of other substances as well. We can find 2.4 times higher perfluorochemicals from stain- and grease-proof coatings in canine companions, 23 times higher values of flame retardants in cats, and 5 times more mercury compared to the average levels tested in humans. All these represent early warning signals. Taking these into account, together with the animal welfare orientation of today's society, finding non-invasive methods to detect the degree of environmental pollution in our animals becomes paramount, alongside the need to raise awareness of the risks carried by certain chemicals we knowingly use.
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Affiliation(s)
- Cristina Hegedus
- Department of Fundamental Sciences, Faculty of Animal Sciences and Biotechnologies, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania;
| | - Luisa Andronie
- Department of Biophysics, Meteorology and Climatology, Faculty of Forestry and Cadastre, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania
| | - Paul Uiuiu
- Department of Fundamental Sciences, Faculty of Animal Sciences and Biotechnologies, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania;
| | - Eugen Jurco
- Department of Technological Sciences, Faculty of Animal Sciences and Biotechnologies, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania;
| | - Eva Andrea Lazar
- Association for the Welfare of Horses, 725700 Vatra Dornei, Romania;
| | - Silvana Popescu
- Department of Animal Hygiene and Welfare, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania;
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Hegedus C, Fidrus E, Boros G, Janka E, Emri G, Karikó K, Remenyik E. 300 The time-dependency of the cyclobutane pyrimidine dimer-evoked cellular damages using a CPD-specific photolyase-encoding mRNA-based model system. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.307] [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: 10/20/2022]
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Tihanyi D, Kispeter E, Vidermann M, Doczi R, Tihanyi D, Hegedus C, Filotas P, Urban L, Petak I. AI oncology algorithm-based prioritisation of EGFR inhibitors in case of rare EGFR mutations. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz413.108] [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: 11/13/2022] Open
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Dóczi R, Tihanyi D, Filotas P, Dirner A, Pálházi B, Várkondi E, Farkas Z, Deri J, Lengyel E, Hegedus C, Petak I. Analysis of molecular profile complexities for immunotherapy decision support. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz253.083] [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: 11/14/2022] Open
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Petak I, Hegedus C, Várkondi E, Farkas Z, Tihanyi D, Dóczi R, Mathiasz D, Lengyel E, Pajkos G, Schwab R, Deri J, Vályi-Nagy I. Introducing standardized medical procedure and dynamic decision support program in precision oncology for the community of practice. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz263.017] [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: 11/13/2022] Open
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Hegedus C, Boros G, Janka E, Fidrus E, Juhász T, Karikó K, Emri G, Bai P, Remenyik É. 550 In vitro delivery of CPD-specific photolyase-encoding mRNA prevents UVB-induced mitochondrial changes. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.465] [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: 10/26/2022]
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Fidrus E, Boros G, Hegedus C, Janka E, Emri G, Karikó K, Remenyik É. 561 Time-dependence of UVB induced cellular mechanisms in cultured human keratinocytes. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.476] [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: 10/26/2022]
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Fidrus E, Fehér P, Hegedus C, Janka E, Paragh G, Bácskay I, Remenyik É. 562 Enhanced UVA-induced cyclobutane pyrimidine dimer formation by silymarin without increased mutagenesis in cultured epithelial cells. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.477] [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: 10/26/2022]
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Petak I, Hegedus C, Binder Z, Peeters M, Rolfo C, Keri G, Schwab R, Urban L. Similarity-based automated evidence ranking for clinical interpretation of multigene diagnostic panels. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw363.88] [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: 11/13/2022] Open
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Hegedus C, Ozvegy-Laczka C, Apáti A, Magócsi M, Német K, Orfi L, Kéri G, Katona M, Takáts Z, Váradi A, Szakács G, Sarkadi B. Interaction of nilotinib, dasatinib and bosutinib with ABCB1 and ABCG2: implications for altered anti-cancer effects and pharmacological properties. Br J Pharmacol 2009; 158:1153-64. [PMID: 19785662 DOI: 10.1111/j.1476-5381.2009.00383.x] [Citation(s) in RCA: 171] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE ABC multidrug transporters (MDR-ABC proteins) cause multiple drug resistance in cancer and may be involved in the decreased anti-cancer efficiency and modified pharmacological properties of novel specifically targeted agents. It has been documented that ABCB1 and ABCG2 interact with several first-generation, small-molecule, tyrosine kinase inhibitors (TKIs), including the Bcr-Abl fusion kinase inhibitor imatinib, used for the treatment of chronic myeloid leukaemia. Here, we have investigated the specific interaction of these transporters with nilotinib, dasatinib and bosutinib, three clinically used, second-generation inhibitors of the Bcr-Abl tyrosine kinase activity. EXPERIMENTAL APPROACH MDR-ABC transporter function was screened in both membrane- and cell-based (K562 cells) systems. Cytotoxicity measurements in Bcr-Abl-positive model cells were coupled with direct determination of intracellular TKI concentrations by high-pressure liquid chromatography-mass spectrometry and analysis of the pattern of Bcr-Abl phosphorylation. Transporter function in membranes was assessed by ATPase activity. KEY RESULTS Nilotinib and dasatinib were high-affinity substrates of ABCG2, and this protein mediated an effective resistance in cancer cells against these compounds. Nilotinib and dasatinib also interacted with ABCB1, but this transporter provided resistance only against dasatinib. Neither ABCB1 nor ABCG2 induced resistance to bosutinib. At relatively higher concentrations, however, each TKI inhibited both transporters. CONCLUSIONS AND IMPLICATIONS A combination of in vitro assays may provide valuable preclinical information for the applicability of novel targeted anti-cancer TKIs, even in multidrug-resistant cancer. The pattern of MDR-ABC transporter-TKI interactions may also help to understand the general pharmacokinetics and toxicities of new TKIs.
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Affiliation(s)
- C Hegedus
- Membrane Research Group of the Hungarian Academy of Sciences, National Blood Center and Semmelweis University, Budapest, Hungary
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Cheng T, Gnanakumar V, Hegedus C, Stewart DA. Complete and durable remission in a patient with life-threatening scleromyxedema treated with high-dose melphalan and BU with auto-SCT. Bone Marrow Transplant 2008; 42:215-7. [PMID: 18500374 DOI: 10.1038/bmt.2008.148] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Two cases of fibrous myopathy associated with repeated, long-term intramuscular injections for treatment of chronic temporomandibular joint pain and chronic headache, respectively, are described. Both patients developed severe, function-limiting contractures in upper and lower extremity muscles used as injection sites. In one of the cases, the contractures were painful. Electrophysiological testing, magnetic resonance imaging and muscle biopsy results were all consistent with myopathy and replacement of skeletal muscle with noncontractile fibrous tissue. These cases are presented to increase awareness of fibrous myopathy and to promote surveillance for this serious potential complication of long-term intramuscular injections in chronic headache and other pain patients.
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Affiliation(s)
- R Burnham
- University of Alberta, Division of Physical Medicine and Rehabilitation, Edmonton, Alberta
| | - S McNeil
- Foothills Medical Centre, Division of Clinical Neurosciences, Calgary, Alberta
| | - C Hegedus
- Red Deer Regional Hospital, David Thompson Health Region, Red Deer, Alberta
| | - DS Gray
- University of Alberta, Division of Physical Medicine and Rehabilitation, Edmonton, Alberta
- Correspondence and reprints: Dr DS Gray, Division of Physical Medicine and Rehabilitation, University of Alberta, c/o 1226 Glenrose Rehabilitation Hospital, 10230 – 111 Avenue, Edmonton, Alberta T5G 0B7. E-mail
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Hegedus C, Daróczi L, Kökényesi V, Beke DL. Comparative microstructural study of the diffusion zone between NiCr alloy and different dental ceramics. J Dent Res 2002; 81:334-7. [PMID: 12097447 DOI: 10.1177/154405910208100509] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Our knowledge on the bonding mechanisms between the metal and ceramic parts of dental systems is very limited. This work tested the hypothesis that the details of the interface processes can be described in the framework of a chemical diffusion model. The development of interfacial phases was investigated by cross-sectional analytical transmission electron microscopy between a NiCr (Wiron 99) alloy and three different dental ceramics (Carat, Vita VMK 95, and Vision). All systems were investigated at normal firing conditions (suggested by the manufacturer) and at increased firing times as well. The conclusions are based on the results that the formation of a nanocrystalline Cr(2)O(3) layer and amorphous silicon oxide inclusions were detected in the early stage of the firing process in all investigated systems, and that, in the case of Carat and Vision ceramics, formation of complex NiCr and NiCrTi oxides was also observed at longer annealing times.
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Affiliation(s)
- C Hegedus
- Medical and Health Science Center, Institute of Dental Science, Department of Prosthetic Dentistry, University of Debrecen, Debrecen, Hungary Nagyerdei krt. 98, H-4012, Hungary.
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Hegedus C, Flóra-Nagy E, Martos R, Juhász A, Fülöp I, Pomaházi S, Nagy IP, Tóth Z, Márton I, Keszthelyi G. 3D reconstruction based on hard tissue microtome cross-section pictures in dentistry. Comput Methods Programs Biomed 2000; 63:77-84. [PMID: 10960740 DOI: 10.1016/s0169-2607(00)00059-6] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of this study was to examine the accuracy of the computerized 3D surface analyzing and volume measuring method in dentistry. Two different types of test objects were used in the first part of the measurements. Each sample of the two groups was cross-sectioned using a hard tissue microtome. The sections were photographed on both sides and were projected on a graphical tablet and analyzed using a computer program. The measured and calculated parameters were compared. In the second part, 200 microm thick horizontal sections were prepared from 11 human incisor roots using the hard tissue microtome. This way, five sections were prepared from the apical 2 mm of each root. The effects of section thickness and number were modeled by decreasing the inclusion rate of the obtained number of sections from 10 to 2 and its influence on the calculated results was determined. This method was suitable for the approximation and analysis of 3D parameters. The results indicated that using 200-300 microm section thickness, the measured values were approximately 8-21% lower than the real parameters.
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Affiliation(s)
- C Hegedus
- School of Dentistry, University Medical School of Debrecen, Nagyerdei krt. 98, H-4012, Debrecen, Hungary.
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Marton IJ, Balla G, Hegedus C, Redi P, Szilagyi Z, Karmazsin L, Kiss C. The role of reactive oxygen intermediates in the pathogenesis of chronic apical periodontitis. Oral Microbiol Immunol 1993; 8:254-7. [PMID: 8247615 DOI: 10.1111/j.1399-302x.1993.tb00570.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The level of malondialdehyde, a stable end product of lipid peroxidation induced by reactive oxygen intermediates and the activity of two potent antioxidant enzymes, superoxide dismutase and glutathione peroxidase, was investigated in tissue homogenates of 22 surgical periapical granuloma specimens. Malondialdehyde levels were significantly higher and glutathione peroxidase activity was significantly lower in periapical granuloma samples than in healthy gingival tissue homogenates, which were used as controls. The activity of superoxide dismutase was similar in periapical granuloma and in control samples. Our results indicate an altered balance between the production and the elimination of toxic oxygen metabolites in chronic apical periodontitis. We hypothesize that reactive oxygen intermediates, which are being produced by activated phagocytic cells abundantly present in periapical granulomas, can contribute to periapical tissue injury and bone loss in this disease.
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Affiliation(s)
- I J Marton
- Department of Stomatology, Medical University of Debrecen, Hungary
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Abstract
This study of mammary Paget's disease was carried out with the objects of clarifying its histogenesis and of determining optimal diagnostic measures. Ten consecutive cases of mammary Paget's disease with their underlying ductal carcinomas were compared. Histologic, histochemical, and immunocytochemical examination mainly supported the hypothesis that mammary Paget's disease is an extension of mammary ductal carcinoma into the overlying nipple epithelium. However, two of our ductal carcinomas stained strongly with S-100 protein, while Paget's disease was uniformly negative with this antibody. The significance of this finding is not known. Optimal diagnostic accuracy is obtained by using a combination of routinely stained sections along with a panel of immunocytochemical stains. Nipple wedge biopsy may demonstrate both intraduct carcinoma and Paget's disease, and is thus a superior biopsy technique.
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Affiliation(s)
- W S Wood
- Department of Pathology, Vancouver General Hospital, B.C., Canada
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Abstract
Peritoneal mesothelioma in a 61-year-old man, occurred 26 years after abdominal radiotherapy for a testicular seminoma. The patient had no history of asbestos exposure. After asbestos, radiation is the second most frequent defined cause of mesothelioma in North America, but the number of well-documented cases is small; this case represents only the fifth example of peritoneal mesothelioma after therapeutic irradiation of the abdomen.
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Affiliation(s)
- B Gilks
- Department of Pathology, University of British Columbia Health Sciences Centre Hospital, Vancouver, Canada
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Bartók I, Bartók K, Hegedus C. [Alpha-1-antitrypsin globules and hepatitis B surface antigen in a patient with hepatic cirrhosis]. Orv Hetil 1983; 124:1875-8. [PMID: 6605505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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