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Klusackova P, Lischkova L, Kolesnikova V, Navratil T, Vlckova S, Fenclova Z, Schwarz J, Ondracek J, Ondrackova L, Kostejn M, Dvorackova S, Rossnerova A, Pohanka M, Bradna P, Zdimal V, Pelclova D. Elevated glutathione in researchers exposed to engineered nanoparticles due to potential adaptation to oxidative stress. Nanomedicine (Lond) 2024; 19:185-198. [PMID: 38275177 DOI: 10.2217/nnm-2023-0207] [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] [Indexed: 01/27/2024] Open
Abstract
Aim: To find a practical biomonitoring method for researchers exposed to nanoparticles causing oxidative stress. Methods: In a continuation of a study in 2016-2018, biological samples (plasma, urine and exhaled breath condensate [EBC]) were collected in 2019-2020 from 43 researchers (13.8 ± 3.0 years of exposure) and 45 controls. Antioxidant status was assessed using glutathione (GSH) and ferric-reducing antioxidant power, while oxidative stress was measured as thiobarbituric acid reactive substances, all using spectrophotometric methods. Researchers' personal nanoparticle exposure was monitored. Results: Plasma GSH was elevated in researchers both before and after exposure (p < 0.01); postexposure plasma GSH correlated with nanoparticle exposure, and GSH in EBC increased. Conclusion: The results suggest adaptation to chronic exposure to nanoparticles, as monitored by plasma and EBC GSH.
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Affiliation(s)
- Pavlina Klusackova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
| | - Lucie Lischkova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
| | - Viktoriia Kolesnikova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
| | - Tomas Navratil
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Prague, 182 00, Czech Republic
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
| | - Jaroslav Schwarz
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, 165 02, Czech Republic
| | - Jakub Ondracek
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, 165 02, Czech Republic
| | - Lucie Ondrackova
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, 165 02, Czech Republic
| | - Martin Kostejn
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, 165 02, Czech Republic
| | - Stepanka Dvorackova
- Faculty of Mechanical Engineering, Department of Machining & Assembly, Department of Engineering Technology, Department of Material Science, Technical University of Liberec, Liberec, 461 17, Czech Republic
| | - Andrea Rossnerova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Department of Nanotoxicology & Molecular Epidemiology, Prague, 142 20, Czech Republic
| | - Miroslav Pohanka
- Faculty of Military Health Sciences, University of Defense, Hradec Kralove, 500 01, Czech Republic
| | - Pavel Bradna
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
| | - Vladimir Zdimal
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, 165 02, Czech Republic
| | - Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague & General University Hospital in Prague, Prague, 128 00, Czech Republic
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Novotna B, Pelclova D, Rossnerova A, Zdimal V, Ondracek J, Lischkova L, Vlckova S, Fenclova Z, Klusackova P, Zavodna T, Topinka J, Komarc M, Dvorackova S, Rossner P. The genotoxic effects in the leukocytes of workers handling nanocomposite materials. Mutagenesis 2021; 35:331-340. [PMID: 32701136 DOI: 10.1093/mutage/geaa016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 06/10/2020] [Indexed: 12/31/2022] Open
Abstract
The extensive development of nanotechnologies and nanomaterials poses a number of questions to toxicologists about the potential health risks of exposure to nanoparticles (NP). In this study, we analysed DNA damage in the leukocytes of 20 workers who were long-term exposed (18 ± 10 years) to NP in their working environment. Blood samples were collected in September 2016, before and after a shift, to assess (i) the chronic effects of NP on DNA (pre-shift samples) and (ii) the acute effects of exposure during the shift (the difference between pre- and post-shift samples). The samples from matched controls were taken in parallel with workers before the shift. Leukocytes were isolated from heparinised blood on a Ficoll gradient. The enzyme-modified comet assay (DNA formamido-pyrimidine-glycosylase and endonuclease III) demonstrated a considerable increase of both single- and double-strand breaks in DNA (DNA-SB) and oxidised bases when compared with the controls (2.4× and 2×, respectively). Acute exposure induced a further increase of DNA-SB. The welding and smelting of nanocomposites represented a higher genotoxic risk than milling and grinding of nanocomposite surfaces. Obesity appeared to be a factor contributing to an increased risk of oxidative damage to DNA. The data also indicated a higher susceptibility of males vs. females to NP exposure. The study was repeated in September 2017. The results exhibited similar trend, but the levels of DNA damage in the exposed subjects were lower compared to previous year. This was probably associated with lower exposure to NP in consequence of changes in nanomaterial composition and working operations. The further study involving also monitoring of personal exposures to NP is necessary to identify (i) the main aerosol components responsible for genotoxic effects in workers handling nanocomposites and (ii) the primary cause of gender differences in response to NP action.
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Affiliation(s)
- Bozena Novotna
- Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska, Prague, Czech Republic
| | - Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, Prague, Czech Republic
| | - Andrea Rossnerova
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska, Prague, Czech Republic
| | - Vladimir Zdimal
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová, Prague, Czech Republic
| | - Jakub Ondracek
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová, Prague, Czech Republic
| | - Lucie Lischkova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, Prague, Czech Republic
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, Prague, Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, Prague, Czech Republic
| | - Pavlina Klusackova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, Prague, Czech Republic
| | - Tana Zavodna
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska, Prague, Czech Republic
| | - Jan Topinka
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska, Prague, Czech Republic
| | - Martin Komarc
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, Prague, Czech Republic
| | - Stepanka Dvorackova
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Faculty of Mechanical Engineering, Studentská, Liberec, Czech Republic
| | - Pavel Rossner
- Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska, Prague, Czech Republic
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Pelclova D, Zdimal V, Komarc M, Schwarz J, Ondracek J, Ondrackova L, Kostejn M, Vlckova S, Fenclova Z, Dvorackova S, Lischkova L, Klusackova P, Kolesnikova V, Rossnerova A, Navratil T. Three-Year Study of Markers of Oxidative Stress in Exhaled Breath Condensate in Workers Producing Nanocomposites, Extended by Plasma and Urine Analysis in Last Two Years. Nanomaterials (Basel) 2020; 10:nano10122440. [PMID: 33291323 PMCID: PMC7762143 DOI: 10.3390/nano10122440] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 11/22/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 12/16/2022]
Abstract
Human data concerning exposure to nanoparticles are very limited, and biomarkers for monitoring exposure are urgently needed. In a follow-up of a 2016 study in a nanocomposites plant, in which only exhaled breath condensate (EBC) was examined, eight markers of oxidative stress were analyzed in three bodily fluids, i.e., EBC, plasma and urine, in both pre-shift and post-shift samples in 2017 and 2018. Aerosol exposures were monitored. Mass concentration in 2017 was 0.351 mg/m3 during machining, and 0.179 and 0.217 mg/m3 during machining and welding, respectively, in 2018. In number concentrations, nanoparticles formed 96%, 90% and 59%, respectively. In both years, pre-shift elevations of 50.0% in EBC, 37.5% in plasma and 6.25% in urine biomarkers were observed. Post-shift elevation reached 62.5% in EBC, 68.8% in plasma and 18.8% in urine samples. The same trend was observed in all biological fluids. Individual factors were responsible for the elevation of control subjects' afternoon vs. morning markers in 2018; all were significantly lower compared to those of workers. Malondialdehyde levels were always acutely shifted, and 8-hydroxy-2-deoxyguanosine levels best showed chronic exposure effect. EBC and plasma analysis appear to be the ideal fluids for bio-monitoring of oxidative stress arising from engineered nanomaterials. Potential late effects need to be targeted and prevented, as there is a similarity of EBC findings in patients with silicosis and asbestosis.
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Affiliation(s)
- Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, 128 00 Prague, Czech Republic; (S.V.); (Z.F.); (L.L.); (P.K.); (V.K.)
- Correspondence: ; Tel.: +420-224-964-532
| | - Vladimir Zdimal
- Institute of Chemical Process Fundamentals CAS, Rozvojova 1/135, 165 02 Prague, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Martin Komarc
- Institute of Biophysics and Informatics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Salmovska, 120 00 Prague, Czech Republic; or
- Faculty of Physical Education and Sport, Charles University and General University Hospital in Prague, José Martího 31, 162 52 Prague, Czech Republic
| | - Jaroslav Schwarz
- Institute of Chemical Process Fundamentals CAS, Rozvojova 1/135, 165 02 Prague, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Jakub Ondracek
- Institute of Chemical Process Fundamentals CAS, Rozvojova 1/135, 165 02 Prague, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Lucie Ondrackova
- Institute of Chemical Process Fundamentals CAS, Rozvojova 1/135, 165 02 Prague, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Martin Kostejn
- Institute of Chemical Process Fundamentals CAS, Rozvojova 1/135, 165 02 Prague, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, 128 00 Prague, Czech Republic; (S.V.); (Z.F.); (L.L.); (P.K.); (V.K.)
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, 128 00 Prague, Czech Republic; (S.V.); (Z.F.); (L.L.); (P.K.); (V.K.)
| | - Stepanka Dvorackova
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Studentska 1402/2, 461 17 Liberec, Czech Republic;
| | - Lucie Lischkova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, 128 00 Prague, Czech Republic; (S.V.); (Z.F.); (L.L.); (P.K.); (V.K.)
| | - Pavlina Klusackova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, 128 00 Prague, Czech Republic; (S.V.); (Z.F.); (L.L.); (P.K.); (V.K.)
| | - Viktoriia Kolesnikova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti, 128 00 Prague, Czech Republic; (S.V.); (Z.F.); (L.L.); (P.K.); (V.K.)
| | - Andrea Rossnerova
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague, Czech Republic;
| | - Tomas Navratil
- J. Heyrovský Institute of Physical Chemistry CAS, Dolejškova, 182 23 Prague, Czech Republic;
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Rossnerova A, Honkova K, Pelclova D, Zdimal V, Hubacek JA, Chvojkova I, Vrbova K, Rossner P, Topinka J, Vlckova S, Fenclova Z, Lischkova L, Klusackova P, Schwarz J, Ondracek J, Ondrackova L, Kostejn M, Klema J, Dvorackova S. DNA Methylation Profiles in a Group of Workers Occupationally Exposed to Nanoparticles. Int J Mol Sci 2020; 21:E2420. [PMID: 32244494 PMCID: PMC7177382 DOI: 10.3390/ijms21072420] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 03/27/2020] [Accepted: 03/30/2020] [Indexed: 02/07/2023] Open
Abstract
The risk of exposure to nanoparticles (NPs) has rapidly increased during the last decade due to the vast use of nanomaterials (NMs) in many areas of human life. Despite this fact, human biomonitoring studies focused on the effect of NP exposure on DNA alterations are still rare. Furthermore, there are virtually no epigenetic data available. In this study, we investigated global and gene-specific DNA methylation profiles in a group of 20 long-term (mean 14.5 years) exposed, nanocomposite, research workers and in 20 controls. Both groups were sampled twice/day (pre-shift and post-shift) in September 2018. We applied Infinium Methylation Assay, using the Infinium MethylationEPIC BeadChips with more than 850,000 CpG loci, for identification of the DNA methylation pattern in the studied groups. Aerosol exposure monitoring, including two nanosized fractions, was also performed as proof of acute NP exposure. The obtained array data showed significant differences in methylation between the exposed and control groups related to long-term exposure, specifically 341 CpG loci were hypomethylated and 364 hypermethylated. The most significant CpG differences were mainly detected in genes involved in lipid metabolism, the immune system, lung functions, signaling pathways, cancer development and xenobiotic detoxification. In contrast, short-term acute NP exposure was not accompanied by DNA methylation changes. In summary, long-term (years) exposure to NP is associated with DNA epigenetic alterations.
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Affiliation(s)
- Andrea Rossnerova
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague 4, Czech Republic; (K.H.); (I.C.); (J.T.)
| | - Katerina Honkova
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague 4, Czech Republic; (K.H.); (I.C.); (J.T.)
| | - Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 120 00 Prague 2, Czech Republic; (D.P.); (S.V.); (Z.F.); (L.L.); (P.K.)
| | - Vladimir Zdimal
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals CAS, Rozvojova 1, 165 02 Prague 6, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Jaroslav A. Hubacek
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Videnska 1958/9, 140 21 Prague 4, Czech Republic;
| | - Irena Chvojkova
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague 4, Czech Republic; (K.H.); (I.C.); (J.T.)
| | - Kristyna Vrbova
- Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague 4, Czech Republic; (K.V.); (P.R.)
| | - Pavel Rossner
- Department of Nanotoxicology and Molecular Epidemiology, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague 4, Czech Republic; (K.V.); (P.R.)
| | - Jan Topinka
- Department of Genetic Toxicology and Epigenetics, Institute of Experimental Medicine CAS, Videnska 1083, 142 20 Prague 4, Czech Republic; (K.H.); (I.C.); (J.T.)
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 120 00 Prague 2, Czech Republic; (D.P.); (S.V.); (Z.F.); (L.L.); (P.K.)
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 120 00 Prague 2, Czech Republic; (D.P.); (S.V.); (Z.F.); (L.L.); (P.K.)
| | - Lucie Lischkova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 120 00 Prague 2, Czech Republic; (D.P.); (S.V.); (Z.F.); (L.L.); (P.K.)
| | - Pavlina Klusackova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 120 00 Prague 2, Czech Republic; (D.P.); (S.V.); (Z.F.); (L.L.); (P.K.)
| | - Jaroslav Schwarz
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals CAS, Rozvojova 1, 165 02 Prague 6, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Jakub Ondracek
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals CAS, Rozvojova 1, 165 02 Prague 6, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Lucie Ondrackova
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals CAS, Rozvojova 1, 165 02 Prague 6, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Martin Kostejn
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals CAS, Rozvojova 1, 165 02 Prague 6, Czech Republic; (V.Z.); (J.S.); (J.O.); (L.O.); (M.K.)
| | - Jiri Klema
- Department of Computer Science, Czech Technical University in Prague, Karlovo namesti 13, 121 35 Prague 2, Czech Republic;
| | - Stepanka Dvorackova
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Studentska 1402/2 Liberec, Czech Republic;
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Hubacek JA, Pelclova D, Dlouha D, Mikuska P, Dvorackova S, Vlckova S, Fenclova Z, Ondracek J, Kostejn M, Schwarz J, Popov A, Krumal K, Lanska V, Coufalik P, Zakharov S, Zdimal V. Leukocyte telomere length is not affected by long-term occupational exposure to nano metal oxides. Ind Health 2019; 57:741-744. [PMID: 30918138 PMCID: PMC6885603 DOI: 10.2486/indhealth.2018-0146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 03/12/2019] [Indexed: 06/09/2023]
Abstract
The aim of this study was to ascertain whether long-term occupational exposure to nanoparticles would affect relative leukocyte telomere length (LrTL). We analysed occupational exposure to size-resolved aerosol particles, with special emphasis on nanoparticles at two workshops: i/ the production of nanocomposites containing metal oxides; ii/ laboratory to test experimental exposure of nano-CuO to rodents. Thirty five exposed researchers (age 39.5 ± 12.6 yr; exposure duration 6.0 ± 3.7 yr) and 43 controls (40.4 ± 10.5 yr) were examined. LrTL did not significantly (p=0.14) differ between the exposed researchers (0.92 ± 0.13) and controls (0.86 ± 0.15). In addition, no significant correlation (r=-0.22, p=0.22) was detected between the duration of occupational exposure and LrTL. The results remained non-significant after multiple adjustments for age, sex and smoking status. Our pilot results suggest that relative leukocyte telomere length is not affected by occupational exposure to nanoparticles.
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Affiliation(s)
- Jaroslav A Hubacek
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Czech Republic
| | - Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Czech Republic
| | - Dana Dlouha
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Czech Republic
| | - Pavel Mikuska
- Institute of Analytical Chemistry of the CAS, Czech Republic
| | - Stepanka Dvorackova
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Czech Republic
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Czech Republic
| | - Jakub Ondracek
- Institute of Chemical Process Fundamentals CAS, Czech Republic
| | - Martin Kostejn
- Institute of Chemical Process Fundamentals CAS, Czech Republic
| | | | - Alex Popov
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Czech Republic
| | - Kamil Krumal
- Institute of Analytical Chemistry of the CAS, Czech Republic
| | - Vera Lanska
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine, Czech Republic
| | - Pavel Coufalik
- Institute of Analytical Chemistry of the CAS, Czech Republic
| | - Sergej Zakharov
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Czech Republic
| | - Vladimir Zdimal
- Institute of Chemical Process Fundamentals CAS, Czech Republic
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Pelclova D, Talacko P, Navratil T, Zamostna B, Fenclova Z, Vlckova S, Zakharov S. Can proteomics predict the prognosis in chronic dioxin intoxication? Monatsh Chem 2019. [DOI: 10.1007/s00706-019-02460-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rossnerova A, Pelclova D, Zdimal V, Rossner P, Elzeinova F, Vrbova K, Topinka J, Schwarz J, Ondracek J, Kostejn M, Komarc M, Vlckova S, Fenclova Z, Dvorackova S. The repeated cytogenetic analysis of subjects occupationally exposed to nanoparticles: a pilot study. Mutagenesis 2019; 34:253-263. [DOI: 10.1093/mutage/gez016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 06/07/2019] [Indexed: 01/23/2023] Open
Abstract
Abstract
The application of nanomaterials has been rapidly increasing during recent years. Inhalation exposure to nanoparticles (NP) may result in negative toxic effects but there is a critical lack of human studies, especially those related to possible DNA alterations. We analyzed pre-shift and post-shift a group of nanocomposite researchers with a long-term working background (17.8 ± 10.0 years) and matched controls. The study group consisted of 73.2% males and 26.8% females. Aerosol exposure monitoring during a working shift (involving welding, smelting, machining) to assess the differences in exposure to particulate matter (PM) including nanosized fractions <25–100 nm, and their chemical analysis, was carried out. A micronucleus assay using Human Pan Centromeric probes, was applied to distinguish between the frequency of centromere positive (CEN+) and centromere negative (CEN−) micronuclei (MN) in the binucleated cells. This approach allowed recognition of the types of chromosomal damage: losses and breaks. The monitoring data revealed differences in the exposure to NP related to individual working processes, and in the chemical composition of nanofraction. The cytogenetic results of this pilot study demonstrated a lack of effect of long-term (years) exposure to NP (total frequency of MN, P = 0.743), although this exposure may be responsible for DNA damage pattern changes (12% increase of chromosomal breaks—clastogenic effect). Moreover, short-term (daily shift) exposure could be a reason for the increase of chromosomal breaks in a subgroup of researchers involved in welding and smelting processes (clastogenic effect, P = 0.037). The gender and/or gender ratio of the study participants was also an important factor for the interpretation of the results. As this type of human study is unique, further research is needed to understand the effects of long-term and short-term exposure to NP.
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Affiliation(s)
- Andrea Rossnerova
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Vladimir Zdimal
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic
| | - Pavel Rossner
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Fatima Elzeinova
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Kristyna Vrbova
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Topinka
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jaroslav Schwarz
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jakub Ondracek
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Kostejn
- Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Komarc
- Institute of Biophysics and Informatics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Stepanka Dvorackova
- Department of Machining and Assembly, Technical University in Liberec, Liberec, Czech Republic
- Department of Engineering Technology, Technical University in Liberec, Liberec, Czech Republic
- Department of Material Science, Technical University in Liberec, Liberec, Czech Republic
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Pelclova D, Navratil T, Kacerova T, Zamostna B, Fenclova Z, Vlckova S, Kacer P. NanoTiO 2 Sunscreen Does Not Prevent Systemic Oxidative Stress Caused by UV Radiation and a Minor Amount of NanoTiO 2 is Absorbed in Humans. Nanomaterials (Basel) 2019; 9:nano9060888. [PMID: 31212919 PMCID: PMC6631994 DOI: 10.3390/nano9060888] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 05/18/2019] [Revised: 06/04/2019] [Accepted: 06/12/2019] [Indexed: 02/06/2023]
Abstract
The present pilot study tested the efficiency of nanoTiO2 sunscreen to prevent the oxidative stress/inflammation caused by ultraviolet (UV) radiation using biomarkers in subjects’ blood, urine, and exhaled breath condensate (EBC). In addition, the skin absorption of nanoTiO2 was studied. Six identical subjects participated in three tests: (A) nanoTiO2 sunscreen, (B) UV radiation, and (C) sunscreen + UV. The first samples were collected before the test and the second after sunscreen application and/or UV exposure. On day 4, the third samples were collected, and the sunscreen was washed off, and the fourth samples were collected on day 11. The following biomarkers were measured: malondialdehyde, 4-hydroxy-trans-hexenal, 4-hydroxy-trans-nonenal, aldehydes C6-C12, 8-iso-Prostaglandin F2α, o-tyrosine, 3-chlorotyrosine, 3-nitrotyrosine, 8-hydroxy-2-deoxyguanosine, 8-hydroxyguanosine, 5-hydroxymethyl uracil, and leukotrienes, using liquid chromatography-electrospray ionisation-tandem mass spectrometry. Titania was measured using inductively coupled plasma mass spectrometry and TiO2 nanoparticles by transmission and scanning electron microscopy. Sunscreen alone did not elevate the markers, but UV increased the biomarkers in the plasma, urine, and EBC. The sunscreen prevented skin redness, however it did not inhibit the elevation of oxidative stress/inflammatory markers. Titania and nanoTiO2 particles were found in the plasma and urine (but not in the EBC) in all sunscreen users, suggesting their skin absorption.
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Affiliation(s)
- Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojišti 1, 128 00 Prague 2, Czech Republic.
| | - Tomas Navratil
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejskova 3, 182 23 Prague 8, Czech Republic.
| | - Tereza Kacerova
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
| | - Blanka Zamostna
- Faculty of Science, Charles University in Prague, Vinicna 5, 128 43 Prague 2, Czech Republic.
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojišti 1, 128 00 Prague 2, Czech Republic.
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojišti 1, 128 00 Prague 2, Czech Republic.
| | - Petr Kacer
- Czech University of Life Sciences, Kamycka 129, 165 00 Prague 6, Czech Republic.
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Pelclova D, Zdimal V, Schwarz J, Dvorackova S, Komarc M, Ondracek J, Kostejn M, Kacer P, Vlckova S, Fenclova Z, Popov A, Lischkova L, Zakharov S, Bello D. Markers of Oxidative Stress in the Exhaled Breath Condensate of Workers Handling Nanocomposites. Nanomaterials (Basel) 2018; 8:E611. [PMID: 30103442 PMCID: PMC6116291 DOI: 10.3390/nano8080611] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 07/17/2018] [Revised: 08/08/2018] [Accepted: 08/08/2018] [Indexed: 01/05/2023]
Abstract
Researchers in nanocomposite processing may inhale a variety of chemical agents, including nanoparticles. This study investigated airway oxidative stress status in the exhaled breath condensate (EBC). Nineteen employees (42.4 ± 11.4 y/o), working in nanocomposites research for 18.0 ± 10.3 years were examined pre-shift and post-shift on a random workday, together with nineteen controls (45.5 ± 11.7 y/o). Panels of oxidative stress biomarkers derived from lipids, nucleic acids, and proteins were analyzed in the EBC. Aerosol exposures were monitored during three major nanoparticle generation operations: smelting and welding (workshop 1) and nanocomposite machining (workshop 2) using a suite of real-time and integrated instruments. Mass concentrations during these operations were 0.120, 1.840, and 0.804 mg/m³, respectively. Median particle number concentrations were 4.8 × 10⁴, 1.3 × 10⁵, and 5.4 × 10⁵ particles/cm³, respectively. Nanoparticles accounted for 95, 40, and 61%, respectively, with prevailing Fe and Mn. All markers of nucleic acid and protein oxidation, malondialdehyde, and aldehydes C₆⁻C13 were elevated, already in the pre-shift samples relative to controls in both workshops. Significant post-shift elevations were documented in lipid oxidation markers. Significant associations were found between working in nanocomposite synthesis and EBC biomarkers. More research is needed to understand the contribution of nanoparticles from nanocomposite processing in inducing oxidative stress, relative to other co-exposures generated during welding, smelting, and secondary oxidation processes, in these workshops.
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Affiliation(s)
- Daniela Pelclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 128 00 Prague 2, Czech Republic.
| | - Vladimir Zdimal
- Institute of Chemical Process Fundamentals of the CAS, Rozvojová 1/135, 165 02 Prague 6, Czech Republic.
| | - Jaroslav Schwarz
- Institute of Chemical Process Fundamentals of the CAS, Rozvojová 1/135, 165 02 Prague 6, Czech Republic.
| | - Stepanka Dvorackova
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Faculty of Mechanical Engineering, Studentská 1402/2, 461 17 Liberec, Czech Republic.
| | - Martin Komarc
- Institute of Biophysics and Informatics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Salmovská 1, 120 00 Prague 2, Czech Republic.
- Faculty of Physical Education and Sport, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, José Martího 31, 162 52 Prague 6, Czech Republic.
| | - Jakub Ondracek
- Institute of Chemical Process Fundamentals of the CAS, Rozvojová 1/135, 165 02 Prague 6, Czech Republic.
| | - Martin Kostejn
- Institute of Chemical Process Fundamentals of the CAS, Rozvojová 1/135, 165 02 Prague 6, Czech Republic.
| | - Petr Kacer
- Biocev, 1st Faculty of Medicine, Charles University, Prumyslova 595, 252 50 Vestec, Czech Republic.
| | - Stepanka Vlckova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 128 00 Prague 2, Czech Republic.
| | - Zdenka Fenclova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 128 00 Prague 2, Czech Republic.
| | - Alexey Popov
- Department of Machining and Assembly, Department of Engineering Technology, Department of Material Science, Faculty of Mechanical Engineering, Technical University in Liberec, Faculty of Mechanical Engineering, Studentská 1402/2, 461 17 Liberec, Czech Republic.
| | - Lucie Lischkova
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 128 00 Prague 2, Czech Republic.
| | - Sergey Zakharov
- Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Na Bojisti 1, 128 00 Prague 2, Czech Republic.
| | - Dhimiter Bello
- Department of Biomedical and Nutritional Sciences, Zuckerberg College of Health Sciences, Lowell, MA 01854, USA.
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Pelclova D, Navratil T, Vlckova S, Fenclova Z, Pelcl T, Kacerova T, Kacer P. Exhaled breath condensate biomarkers reflect systemic changes in patients with chronic dioxin intoxication. Monatsh Chem 2018. [DOI: 10.1007/s00706-018-2211-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Pelcl T, Skrha J, Prazny M, Vlckova S, Fenclova Z, Navratil T, Malik J, Diblik P, Zikan V, Pelclova D. Diabetes, Cardiovascular Disorders and 2,3,7,8-Tetrachlorodibenzo-p-Dioxin Body Burden in Czech Patients 50 Years After the Intoxication. Basic Clin Pharmacol Toxicol 2018; 123:356-359. [DOI: 10.1111/bcpt.13013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 03/12/2018] [Indexed: 01/14/2023]
Affiliation(s)
- Tomas Pelcl
- 3rd Department of Internal Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Jan Skrha
- 3rd Department of Internal Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Martin Prazny
- 3rd Department of Internal Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Stepanka Vlckova
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Tomas Navratil
- J. Heyrovsky Institute of Physical Chemistry of the CAS CR, v.v.i.; Prague Czech Republic
| | - Jan Malik
- 3rd Department of Internal Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Pavel Diblik
- Department of Ophthalmology; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Vit Zikan
- 3rd Department of Internal Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
| | - Daniela Pelclova
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University in Prague and General University Hospital in Prague; Prague Czech Republic
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Pelclova D, Zdimal V, Dvorackova S, Komarc M, Vlckova S, Fenclova Z, Schwarz J, Ondracek J, Makes O, Kacer P, Zakharov S. Markers of oxidative stress are elevated in exhaled breath condensate of workers in nanocomposites production. Toxicol Lett 2017. [DOI: 10.1016/j.toxlet.2017.07.511] [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: 11/24/2022]
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13
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Pelclova D, Urban P, Fenclova Z, Vlckova S, Ridzon P, Kupka K, Meckova Z, Bezdicek O, Navratil T, Rosmus J, Zakharov S. Neurological and Neurophysiological Findings in Workers with Chronic 2,3,7,8‐Tetrachlorodibenzo‐
p
‐Dioxin Intoxication 50 Years After Exposure. Basic Clin Pharmacol Toxicol 2017; 122:271-277. [DOI: 10.1111/bcpt.12899] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 08/09/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Daniela Pelclova
- Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Pavel Urban
- Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
- National Institute of Public Health Prague Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Stepanka Vlckova
- Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Petr Ridzon
- Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Karel Kupka
- Institute of Nuclear Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Zuzana Meckova
- Institute of Nuclear Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Ondrej Bezdicek
- Department of Neurology First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Tomas Navratil
- J. Heyrovsky Institute of Physical Chemistry of the CAS, v.v.i. Prague Czech Republic
- Institute of Biochemistry and Laboratory Diagnostics First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
| | - Jan Rosmus
- State Veterinary Institute Prague Chemistry Czech Republic
| | - Sergey Zakharov
- Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
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Bezdicek O, Michalec J, Vaneckova M, Klempir J, Liskova I, Seidl Z, Janikova B, Miovsky M, Hubacek J, Diblik P, Kuthan P, Pilin A, Kurcova I, Fenclova Z, Petrik V, Navratil T, Pelclova D, Zakharov S, Ruzicka E. Cognitive sequelae of methanol poisoning involve executive dysfunction and memory impairment in cross-sectional and long-term perspective. Alcohol 2017; 59:27-35. [PMID: 28262185 DOI: 10.1016/j.alcohol.2016.12.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 11/25/2016] [Accepted: 12/09/2016] [Indexed: 11/24/2022]
Abstract
Methanol poisoning leads to lesions in the basal ganglia and subcortical white matter, as well as to demyelination and atrophy of the optic nerve. However, information regarding cognitive deficits in a large methanol sample is lacking. The principal aim of the present study was to identify the cognitive sequelae of methanol poisoning and their morphological correlates. A sample of 50 patients (METH; age 48 ± 13 years), 3-8 months after methanol poisoning, and 57 control subjects (CS; age 49 ± 13 years) were administered a neuropsychological battery. Forty-six patients were followed in 2 years' perspective. Patients additionally underwent 1.5T magnetic resonance imaging (MRI). Three biochemical and toxicological metabolic markers and a questionnaire regarding alcohol abuse facilitated the classification of 24 patients with methanol poisoning without alcohol abuse (METHna) and 22 patients with methanol poisoning and alcohol abuse (METHa). All groups were compared to a control group of similar size, and matched for age, education, premorbid intelligence level, global cognitive performance, and level of depressive symptoms. Using hierarchical multiple regression we found significant differences between METH and CS, especially in executive and memory domains. METHa showed a similar pattern of cognitive impairment with generally more severe executive dysfunction. Moreover, all METH patients with extensive involvement on brain MRI (lesions in ≥2 anatomical regions) had a more severe cognitive impairment. From a longitudinal perspective, we did not find any changes in their cognitive functioning after 2 years' follow-up. Our findings suggest that methanol poisoning is associated with executive dysfunction and explicit memory impairment, supposedly due to basal ganglia dysfunction and disruption of frontostriatal circuitry proportional to the number of brain lesions, and that these changes are persistent after 2 years' follow-up.
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Pelclova D, Zdimal V, Kacer P, Komarc M, Fenclova Z, Vlckova S, Zikova N, Schwarz J, Makes O, Navratil T, Zakharov S, Bello D. Markers of lipid oxidative damage among office workers exposed intermittently to air pollutants including nanoTiO2 particles. Rev Environ Health 2017; 32:193-200. [PMID: 27754970 DOI: 10.1515/reveh-2016-0030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
Nanoscale titanium dioxide (nanoTiO2) is a commercially important nanomaterial used in numerous applications. Experimental studies with nanotitania have documented lung injury and inflammation, oxidative stress, and genotoxicity. Production workers in TiO2 manufacturing with a high proportion of nanoparticles and a mixture of other air pollutants, such as gases and organic aerosols, had increased markers of oxidative stress, including DNA and protein damage, as well as lipid peroxidation in their exhaled breath condensate (EBC) compared to unexposed controls. Office workers were observed to get intermittent exposures to nanoTiO2 during their process monitoring. The aim of this study was to investigate the impact of such short-term exposures on the markers of health effects in office workers relative to production workers from the same factory. Twenty-two office employees were examined. They were occupationally exposed to (nano)TiO2 aerosol during their daily visits of the production area for an average of 14±9 min/day. Median particle number concentration in office workers while in the production area was 2.32×104/cm3. About 80% of the particles were <100 nm in diameter. A panel of biomarkers of lipid oxidation, specifically malondialdehyde (MDA), 4-hydroxy-trans-hexenal (HHE), 4-hydroxy-trans-nonenal (HNE), 8-isoprostaglandin F2α (8-isoprostane), and aldehydes C6-C12, were studied in the EBC and urine of office workers and 14 unexposed controls. Nine markers of lipid oxidation were elevated in the EBC of office employees relative to controls (p<0.05); only 8-isoprostane and C11 were not increased. Significant association was found in the multivariate analysis between their employment in the TiO2 production plant and EBC markers of lipid oxidation. No association was seen with age, lifestyle factors, or environmental air contamination. The EBC markers in office employees reached about 50% of the levels measured in production workers, and the difference between production workers and office employees was highly significant (p<0.001). None of these biomarkers were elevated in urine. The approach presented here seems to be very sensitive and useful for non-invasive monitoring of employees exposed to air pollutants, including gases, organic aerosols, and nanoTiO2, and may prove useful for routine biomonitoring purposes. Among them, aldehydes C6, C8, C9, and C10 appear to be the most sensitive markers of lipid oxidation in similar occupational cohorts. One major challenge with sensitive biomonitoring techniques, however, is their non-specificity and difficulty in interpreting the meaning of their physiological values in the context of chronic disease development and damage-repair kinetics.
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Pelclova D, Zdimal V, Kacer P, Vlckova S, Fenclova Z, Navratil T, Komarc M, Schwarz J, Zikova N, Makes O, Zakharov S. Markers of nucleic acids and proteins oxidation among office workers exposed to air pollutants including (nano)TiO2 particles. Neuro Endocrinol Lett 2016; 37:13-16. [PMID: 28263525] [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] [Received: 06/26/2016] [Accepted: 10/30/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVES Experimental studies using nanoscale TiO2 have documented lung injury, inflammation, oxidative stress, and genotoxicity. Human health data are extremely scarce. METHODS In exhaled breath condensate (EBC) and urine of 22 office employees occupationally exposed to TiO2 during their visit in the production workshops for average 14±9 min/day a panel of biomarkers of nucleic acids and proteins oxidation was studied, specifically 8-hydroxy-2-deoxyguanosine (8-OHdG), 8-hydroxyguanosine (8-OHG), 5-hydroxymethyl uracil (5-OHMeU), o-tyrosine (o-Tyr), 3-chlorotyrosine (3-ClTyr), and 3-nitrotyrosine (3-NOTyr). Examination was performed also in 14 comparable controls. RESULTS The median respirable TiO2 mass concentration in the workshops was 0.40 mg/m3, median number concentration was 2.32×104 particles/cm3 with 80% of the particles being <100 nm in diameter. All 6 markers of oxidation were elevated in EBC in factory office employees relative to controls (p<0.01). Significant association was found between their job in TiO2 production plant and 5 markers of oxidation (except 3-NOTyr) in the EBC in multivariate analysis. No elevation of markers was detected in the urine. CONCLUSION This pilot study suggests that even short nanoTiO2 exposure may lead to pulmonary oxidative stress; however this effect may be short-term and reversible. The clinical significance of these findings is unclear and more studies are needed.
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Affiliation(s)
- Daniela Pelclova
- Charles University and General University Hospital in Prague, 1st Faculty of Medicine, Department of Occupational Medicine, Prague, Czech Republic
| | - Vladimir Zdimal
- Institute of Chemical Process Fundamentals of the CAS CR, v.v.i., Prague, Czech Republic
| | - Petr Kacer
- Institute of Chemical Technology Prague, Czech Republic
| | - Stepanka Vlckova
- Charles University and General University Hospital in Prague, 1st Faculty of Medicine, Department of Occupational Medicine, Prague, Czech Republic
| | - Zdenka Fenclova
- Charles University and General University Hospital in Prague, 1st Faculty of Medicine, Department of Occupational Medicine, Prague, Czech Republic
| | - Tomas Navratil
- J. Heyrovský Institute of Physical Chemistry of the CAS CR, v.v.i., Prague, Czech Republic
| | - Martin Komarc
- Charles University, Faculty of Physical Education and Sport, Department of Kinanthropology and Humanities, Prague, Czech Republic
- Charles University, 1st Faculty of Medicine, Institute of Biophysics and Informatics, Prague, Czech Republic
| | - Jaroslav Schwarz
- Institute of Chemical Process Fundamentals of the CAS CR, v.v.i., Prague, Czech Republic
| | - Nadezda Zikova
- Institute of Chemical Process Fundamentals of the CAS CR, v.v.i., Prague, Czech Republic
| | - Otakar Makes
- Institute of Chemical Process Fundamentals of the CAS CR, v.v.i., Prague, Czech Republic
| | - Sergey Zakharov
- Charles University and General University Hospital in Prague, 1st Faculty of Medicine, Department of Occupational Medicine, Prague, Czech Republic
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Pelclova D, Zdimal V, Kacer P, Zikova N, Komarc M, Fenclova Z, Vlckova S, Schwarz J, Makeš O, Syslova K, Navratil T, Turci F, Corazzari I, Zakharov S, Bello D. Markers of lipid oxidative damage in the exhaled breath condensate of nano TiO 2 production workers. Nanotoxicology 2016; 11:52-63. [PMID: 27855548 DOI: 10.1080/17435390.2016.1262921] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Nanoscale titanium dioxide (nanoTiO2) is a commercially important nanomaterial. Animal studies have documented lung injury and inflammation, oxidative stress, cytotoxicity and genotoxicity. Yet, human health data are scarce and quantitative risk assessments and biomonitoring of exposure are lacking. NanoTiO2 is classified by IARC as a group 2B, possible human carcinogen. In our earlier studies we documented an increase in markers of inflammation, as well as DNA and protein oxidative damage, in exhaled breath condensate (EBC) of workers exposed nanoTiO2. This study focuses on biomarkers of lipid oxidation. Several established lipid oxidative markers (malondialdehyde, 4-hydroxy-trans-hexenal, 4-hydroxy-trans-nonenal, 8-isoProstaglandin F2α and aldehydes C6-C12) were studied in EBC and urine of 34 workers and 45 comparable controls. The median particle number concentration in the production line ranged from 1.98 × 104 to 2.32 × 104 particles/cm3 with ∼80% of the particles <100 nm in diameter. Mass concentration varied between 0.40 and 0.65 mg/m3. All 11 markers of lipid oxidation were elevated in production workers relative to the controls (p < 0.001). A significant dose-dependent association was found between exposure to TiO2 and markers of lipid oxidation in the EBC. These markers were not elevated in the urine samples. Lipid oxidation in the EBC of workers exposed to (nano)TiO2 complements our earlier findings on DNA and protein damage. These results are consistent with the oxidative stress hypothesis and suggest lung injury at the molecular level. Further studies should focus on clinical markers of potential disease progression. EBC has reemerged as a sensitive technique for noninvasive monitoring of workers exposed to engineered nanoparticles.
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Affiliation(s)
- Daniela Pelclova
- a Department of Occupational Medicine , First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague , Prague , Czech Republic
| | - Vladimir Zdimal
- b Institute of Chemical Process Fundamentals of the CAS , Prague , Czech Republic
| | - Petr Kacer
- c Institute of Chemical Technology Prague , Prague , Czech Republic
| | - Nadezda Zikova
- b Institute of Chemical Process Fundamentals of the CAS , Prague , Czech Republic
| | - Martin Komarc
- d Department of Methodology , Faculty of Physical Education and Sport, Charles University in Prague , Prague , Czech Republic.,e First Faculty of Medicine, Institute of Informatics, Charles University in Prague and General University Hospital in Prague , Prague , Czech Republic
| | - Zdenka Fenclova
- a Department of Occupational Medicine , First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague , Prague , Czech Republic
| | - Stepanka Vlckova
- a Department of Occupational Medicine , First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague , Prague , Czech Republic
| | - Jaroslav Schwarz
- b Institute of Chemical Process Fundamentals of the CAS , Prague , Czech Republic
| | - Otakar Makeš
- b Institute of Chemical Process Fundamentals of the CAS , Prague , Czech Republic
| | - Kamila Syslova
- c Institute of Chemical Technology Prague , Prague , Czech Republic
| | - Tomas Navratil
- f J. Heyrovský Institute of Physical Chemistry of the CAS , Prague , Czech Republic
| | - Francesco Turci
- g Department of Chemistry , "G. Scansetti" Interdepartmental Centre, and NIS Interdepartmental Centre, University of Torino , Torino , Italy
| | - Ingrid Corazzari
- g Department of Chemistry , "G. Scansetti" Interdepartmental Centre, and NIS Interdepartmental Centre, University of Torino , Torino , Italy
| | - Sergey Zakharov
- a Department of Occupational Medicine , First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague , Prague , Czech Republic
| | - Dhimiter Bello
- h UMass Lowell, Department of Public Health , College of Health Sciences , Lowell, MA , USA
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Pelclova D, Zdimal V, Kacer P, Fenclova Z, Vlckova S, Komarc M, Navratil T, Schwarz J, Zikova N, Makes O, Syslova K, Belacek J, Zakharov S. Leukotrienes in exhaled breath condensate and fractional exhaled nitric oxide in workers exposed to TiO
2
nanoparticles. J Breath Res 2016; 10:036004. [DOI: 10.1088/1752-7155/10/3/036004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Pelclova D, Zdimal V, Kacer P, Fenclova Z, Vlckova S, Syslova K, Navratil T, Schwarz J, Zikova N, Barosova H, Turci F, Komarc M, Pelcl T, Belacek J, Kukutschova J, Zakharov S. Oxidative stress markers are elevated in exhaled breath condensate of workers exposed to nanoparticles during iron oxide pigment production. J Breath Res 2016; 10:016004. [PMID: 26828137 DOI: 10.1088/1752-7155/10/1/016004] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Markers of oxidative stress and inflammation were analysed in the exhaled breath condensate (EBC) and urine samples of 14 workers (mean age 43 ± 7 years) exposed to iron oxide aerosol for an average of 10 ± 4 years and 14 controls (mean age 39 ± 4 years) by liquid chromatography-electrospray ionization-mass spectrometry/mass spectrometry (LC-ESI-MS/MS) after solid-phase extraction. Aerosol exposure in the workplace was measured by particle size spectrometers, a scanning mobility particle sizer (SMPS) and an aerodynamic particle sizer (APS), and by aerosol concentration monitors, P-TRAK and DustTRAK DRX. Total aerosol concentrations in workplace locations varied greatly in both time and space. The median mass concentration was 0.083 mg m(-3) (IQR 0.063-0.133 mg m(-3)) and the median particle concentration was 66 800 particles cm(-3) (IQR 16,900-86,900 particles cm(-3)). In addition, more than 80% of particles were smaller than 100 nm in diameter. Markers of oxidative stress, malondialdehyde (MDA), 4-hydroxy-trans-hexenale (HHE), 4-hydroxy-trans-nonenale (HNE), 8-isoProstaglandin F2α (8-isoprostane) and aldehydes C6-C12, in addition to markers of nucleic acid oxidation, including 8-hydroxy-2-deoxyguanosine (8-OHdG), 8-hydroxyguanosine (8-OHG), 5-hydroxymethyl uracil (5-OHMeU), and of proteins, such as o-tyrosine (o-Tyr), 3-chlorotyrosine (3-ClTyr), and 3-nitrotyrosine (3-NOTyr) were analysed in EBC and urine by LC-ESI-MS/MS. Almost all markers of lipid, nucleic acid and protein oxidation were elevated in the EBC of workers comparing with control subjects. Elevated markers were MDA, HNE, HHE, C6-C10, 8-isoprostane, 8-OHdG, 8-OHG, 5-OHMeU, 3-ClTyr, 3-NOTyr, o-Tyr (all p < 0.001), and C11 (p < 0.05). Only aldehyde C12 and the pH of samples did not differ between groups. Markers in urine were not elevated. These findings suggest the adverse effects of nano iron oxide aerosol exposure and support the utility of oxidative stress biomarkers in EBC. The analysis of urine oxidative stress biomarkers does not support the presence of systemic oxidative stress in iron oxide pigment production workers.
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Affiliation(s)
- Daniela Pelclova
- Charles University in Prague and General University Hospital in Prague, First Faculty of Medicine, Department of Occupational Medicine, Na Bojišti 1, 128 00 Prague 2, Czech Republic
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Pelclova D, Zdimal V, Fenclova Z, Vlckova S, Turci F, Corazzari I, Kacer P, Schwarz J, Zikova N, Makes O, Syslova K, Komarc M, Belacek J, Navratil T, Machajova M, Zakharov S. Markers of oxidative damage of nucleic acids and proteins among workers exposed to TiO2 (nano) particles. Occup Environ Med 2015; 73:110-8. [PMID: 26644454 DOI: 10.1136/oemed-2015-103161] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 11/11/2015] [Indexed: 12/19/2022]
Abstract
OBJECTIVE The use of nanotechnology is growing enormously and occupational physicians have an increasing interest in evaluating potential hazards and finding biomarkers of effect in workers exposed to nanoparticles. METHODS A study was carried out with 36 workers exposed to (nano)TiO2 pigment and 45 controls. Condensate (EBC) titanium and markers of oxidation of nucleic acids (including 8-hydroxy-2-deoxyguanosine (8-OHdG), 8-hydroxyguanosine (8-OHG), 5-hydroxymethyl uracil (5-OHMeU)) and proteins (such as o-tyrosine (o-Tyr), 3-chlorotyrosine (3-ClTyr) and 3-nitrotyrosine (3-NOTyr)) were analysed from samples of their exhaled breath. RESULTS In the production workshops, the median total mass 2012 and 2013 TiO2 concentrations were 0.65 and 0.40 mg/m(3), respectively. The median numbers of concentrations measured by the scanning mobility particle sizer (SMPS) and aerodynamic particle sizer (APS) were 1.98 × 10(4) and 2.32 × 10(4) particles/cm(3), respectively; and about 80% of those particles were smaller than 100 nm in diameter. In the research workspace, lower aerosol concentrations (0.16 mg/m(3) and 1.32 × 10(4) particles/cm(3)) were found. Titanium in the EBC was significantly higher in production workers (p<0.001) than in research workers and unexposed controls. Accordingly, most EBC oxidative stress markers, including in the preshift samples, were higher in production workers than in the two other groups. Multiple regression analysis confirmed an association between the production of TiO2 and the levels of studied biomarkers. CONCLUSIONS The concentration of titanium in EBC may serve as a direct exposure marker in workers producing TiO2 pigment; the markers of oxidative stress reflect the local biological effect of (nano)TiO2 in the respiratory tract of the exposed workers.
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Affiliation(s)
- D Pelclova
- First Faculty of Medicine, Department of Occupational Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic
| | - V Zdimal
- Institute of Chemical Process Fundamentals of the AS CR, vvi, Prague, Czech Republic
| | - Z Fenclova
- First Faculty of Medicine, Department of Occupational Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic
| | - S Vlckova
- First Faculty of Medicine, Department of Occupational Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic
| | - F Turci
- Interdepartmental Centre "G Scansetti" for Studies on Asbestos and Other Toxic Particulates and NIS Interdepartmental Centre for Nanostructured Interfaces and Surfaces, University of Torino, Torino, Italy
| | - I Corazzari
- Interdepartmental Centre "G Scansetti" for Studies on Asbestos and Other Toxic Particulates and NIS Interdepartmental Centre for Nanostructured Interfaces and Surfaces, University of Torino, Torino, Italy
| | - P Kacer
- Institute of Chemical Technology, Prague, Czech Republic
| | - J Schwarz
- Institute of Chemical Process Fundamentals of the AS CR, vvi, Prague, Czech Republic
| | | | - O Makes
- Institute of Chemical Process Fundamentals of the AS CR, vvi, Prague, Czech Republic Institute of Chemical Process Fundamentals of the AS CR, vvi, Prague, Czech Republic
| | - K Syslova
- Institute of Chemical Technology, Prague, Czech Republic
| | - M Komarc
- First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Institute of Biophysics and Informatics, Prague, Czech Republic Faculty of Physical Education and Sport, Department of Kinanthropology and Humanities, Charles University in Prague, Prague, Czech Republic
| | - J Belacek
- First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Institute of Biophysics and Informatics, Prague, Czech Republic
| | - T Navratil
- J Heyrovský Institute of Physical Chemistry of the AS CR, vvi, Prague, Czech Republic First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Institute of Medical Biochemistry and Laboratory Diagnostics, Prague, Czech Republic
| | - M Machajova
- Faculty of Health Sciences and Social Work, Department of Public Health, Trnava University, Trnava, Slovakia
| | - S Zakharov
- First Faculty of Medicine, Department of Occupational Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic
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Pelclova D, Barosova H, Kukutschova J, Zdimal V, Navratil T, Fenclova Z, Vlckova S, Schwarz J, Zikova N, Kacer P, Komarc M, Belacek J, Zakharov S. Raman microspectroscopy of exhaled breath condensate and urine in workers exposed to fine and nano TiO
2
particles: a cross-sectional study. J Breath Res 2015; 9:036008. [DOI: 10.1088/1752-7155/9/3/036008] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Zakharov S, Pelclova D, Urban P, Navratil T, Diblik P, Kuthan P, Hubacek JA, Miovsky M, Klempir J, Vaneckova M, Seidl Z, Pilin A, Fenclova Z, Petrik V, Kotikova K, Nurieva O, Ridzon P, Rulisek J, Komarc M, Hovda KE. Czech mass methanol outbreak 2012: epidemiology, challenges and clinical features. Clin Toxicol (Phila) 2014; 52:1013-24. [PMID: 25345388 DOI: 10.3109/15563650.2014.974106] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Methanol poisonings occur frequently globally, but reports of larger outbreaks where complete clinical and laboratory data are reported remain scarce. The objective of the present study was to report the data from the mass methanol poisoning in the Czech Republic in 2012 addressing the general epidemiology, treatment, and outcomes, and to present a protocol for the use of fomepizole ensuring that the antidote was provided to the most severely poisoned patients in the critical phase. METHODS A combined prospective and retrospective case series study of 121 patients with confirmed methanol poisoning. RESULTS From a total of 121 intoxicated subjects, 20 died outside the hospital and 101 were hospitalized. Among them, 60 survived without, and 20 with visual/CNS sequelae, whereas 21 patients died. The total and hospital mortality rates were 34% and 21%, respectively. Multivariate regression analysis found pH < 7.0 (OR 0.04 (0.01-0.16), p < 0.001), negative serum ethanol (OR 0.08 (0.02-0.37), p < 0.001), and coma on admission (OR 29.4 (10.2-84.6), p < 0.001) to be the only independent parameters predicting death. Continuous hemodialysis was used more often than intermittent hemodialysis, but there was no significant difference in mortality rate between the two [29% (n = 45) vs 17% (n = 30), p = 0.23]. Due to limited stockpiles of fomepizole, ethanol was administered more often; no difference in mortality rate was found between the two [16% (n = 70) vs. 24% (n = 21), p = 0.39]. The effect of folate administration both on the mortality rate and on the probability of visual sequelae was not significant (both p > 0.05). CONCLUSIONS Severity of metabolic acidosis, state of consciousness, and serum ethanol on admission were the only significant parameters associated with mortality. The type of dialysis or antidote did not appear to affect mortality. Recommendations that were issued for hospital triage of fomepizole administration allowed conservation of valuable antidote in this massive poisoning outbreak for those patients most in need.
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Affiliation(s)
- Sergey Zakharov
- Department of Occupational Medicine,Toxicological Information Center, First Faculty of Medicine, Charles University in Prague and General University Hospital , Prague , Czech Republic
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Hubacek JA, Pelclova D, Seidl Z, Vaneckova M, Klempir J, Ruzicka E, Ridzon P, Urban P, Fenclova Z, Petrik V, Diblik P, Kuthan P, Miovsky M, Janikova B, Adamkova V, Zakharov S. Rare Alleles within theCYP2E1(MEOS System) Could be Associated with Better Short-Term Health Outcome after Acute Methanol Poisoning. Basic Clin Pharmacol Toxicol 2014; 116:168-72. [DOI: 10.1111/bcpt.12310] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 08/05/2014] [Indexed: 12/20/2022]
Affiliation(s)
- Jaroslav A. Hubacek
- Centre for Experimental Medicine; Institute for Clinical and Experimental Medicine; Prague Czech Republic
| | - Daniela Pelclova
- Department of Occupational Medicine of 1st Faculty of Medicine; Toxicological Information Centre; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Zdenek Seidl
- Department of Radiology; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Manuela Vaneckova
- Department of Radiology; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Jiri Klempir
- Department of Neurology and Centre of Clinical Neuroscience; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Evzen Ruzicka
- Department of Neurology and Centre of Clinical Neuroscience; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Petr Ridzon
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Pavel Urban
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Zdenka Fenclova
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Vit Petrik
- Department of Occupational Medicine; 1st Faculty of Medicine; Charles University and General University Hospital in Prague; Prague Czech Republic
| | - Pavel Diblik
- Department of Ophthalmology; General University Hospital in Prague; Prague Czech Republic
| | - Pavel Kuthan
- Department of Ophthalmology; General University Hospital in Prague; Prague Czech Republic
| | - Michal Miovsky
- Department of Addictology; First Faculty of Medicine; Charles University in Prague and General University Hospital; Prague Czech Republic
| | - Barbara Janikova
- Department of Addictology; First Faculty of Medicine; Charles University in Prague and General University Hospital; Prague Czech Republic
| | - Vera Adamkova
- Centre for Experimental Medicine; Institute for Clinical and Experimental Medicine; Prague Czech Republic
| | - Sergey Zakharov
- Department of Occupational Medicine of 1st Faculty of Medicine; Toxicological Information Centre; Charles University and General University Hospital in Prague; Prague Czech Republic
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Pelclova D, Navratil T, Fenclova Z, Vlckova S, Kupka K, Urban P, Ridzon P, Zikan V, Landova L, Syslova K, Kuzma M, Kacer P. Increased oxidative/nitrosative stress markers measured non- invasively in patients with high 2,3,7,8-tetrachloro-dibenzo-p-dioxin plasma level. Neuro Endocrinol Lett 2011; 32 Suppl 1:71-76. [PMID: 22167218] [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] [Received: 05/20/2011] [Accepted: 08/25/2011] [Indexed: 05/31/2023]
Abstract
OBJECTIVES 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) is a highly toxic persistent environmental contaminant, classified as a human carcinogen affecting any target organ. The mechanism of carcinogenesis by TCDD is unclear as TCDD shows a lack of direct genotoxicity. Experimental studies also support the role of oxidative stress in TCDD neurotoxicity and vascular dysfunction. The aim was to investigate markers of oxidative/nitrosative stress and inflammation using non-invasive methods in subjects who got ill due to severe occupational exposure to TCDD in the years 1965-1968. METHODS In 11 TCDD-exposed patients, and 16 controls, the analysis of following oxidative products of lipids, proteins and nucleic acids in plasma, urine and exhaled breath condensate (EBC) was performed: 8-iso-prostaglandin F2α (8-isoprostane), 4-hydroxy-trans-2-nonenale (HNE), malondialdehyde (MDA), o-tyrosine (o-Tyr), 8-hydroxyguanosine (8-OHG), 8-hydroxy-2´-deoxy-guanosine (8-OHdG), 5-hydroxymethyluracil (5-OHMeU). In addition, nitric-oxide-tyrosine (NO-Tyr) and leukotriene (LT) B4, C4, D4, and E4 were detected by liquid chromatography-mass spectrometry/mass spectrometry (LC-ESI-MS/MS). TCDD was measured by HRGC/HRMS, body lipid content by densitometry. Single-photon emission spectrometry (SPECT) of the brain was performed and compared with the findings of the patients in 2008. RESULTS Mean TCDD plasma level in 2010 was 175 ± 162 pg/g lipids (population level about 2 pg/g), total TCDD content in the body 5.16 ± 4.62 mg. Reduction of cerebral blood flow in SPECT progressed in 8 patients, finding was stable in 2 subjects, and improvement occurred in 1 patient. In the EBC, 10 from 12 markers (all except LT D4 and LT E4), were significantly increased in the patients (p<0.05). In the urine, 7 markers were significantly higher than in the controls (p<0.05): 8-isoprostane, MDA, HNE, LT C4, LT E4, o-Tyr and NO-Tyr. In plasma, only NO-Tyr and 8-OHG were elevated (p<0.05). CONCLUSION NO-Tyr was increased in all matrices in dioxin-exposed patients. EBC is not limited to lung disorders as the markers of oxidative stress and inflammation were elevated in EBC of patients with normal lung functions. TCDD-induced oxidative stress and inflammation markers can be detected non-invasively in the EBC and urine in the follow-up of the highly-exposed patients. Their prognostic value, however, needs to be elucidated.
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Affiliation(s)
- Daniela Pelclova
- Department of Occupational Medicine of the First Faculty of Medicine and General University Hospital, Charles University Prague, Czech Republic.
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Rihova Z, Maixnerova D, Jancova E, Pelclova D, Bartunkova J, Fenclova Z, Vankova Z, Reiterova J, Merta M, Rysava R, Tesar V. Silica and Asbestos Exposure in ANCA-Associated Vasculitis with Pulmonary Involvement. Ren Fail 2009; 27:605-8. [PMID: 16153001 DOI: 10.1080/08860220500200395] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [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: 10/25/2022] Open
Abstract
Silica and asbestos exposure are thought to belong to the triggering factors of antineutrophil cytoplasm antibodies (ANCA)-associated vasculitis. We carried out a study to find out whether patients with pulmonary involvement attributable to ANCA-associated vasculitis (AAV) have been exposed to silicon-containing materials. Thirty-one patients (12 women, 19 men, median age 51 years) were interviewed using a structured questionnaire. Occupational exposure to silicon-containing chemicals was reported by 22.6% of the patients (12.9% to SiO2, 9.7% to asbestos), compared with 0% of control subjects (p<0.05). Our findings support the pathophysiologic role of silica in AAV.
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Affiliation(s)
- Zuzana Rihova
- Nephrology Unit, 1st Medical Faculty, Charles University, Prague, Czech Republic.
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Pelclova D, Fenclova Z, Urban P, Ridzon P, Preiss J, Kupka K, Malik J, Dubska Z, Navratil T. Chronic health impairment due to 2,3,7,8-tetrachloro-dibenzo-p-dioxin exposure. Neuro Endocrinol Lett 2009; 30 Suppl 1:219-224. [PMID: 20027174] [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] [Received: 05/21/2009] [Accepted: 06/09/2009] [Indexed: 05/28/2023]
Abstract
OBJECTIVES The aim of this study, performed in 2008, was to evaluate the consequences of severe occupational intoxication with 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) that occurred during production of the herbicide trichlorophenoxyacetic acid in the period 1965-1968. DESIGN Examination of 11 men, mean age 64.4+/-1.5 years, included: internal and neurological examination, eye fundus examination, TCDD in plasma, thyroid-stimulating hormone (TSH), testosterone and serum lipids, ultrasonography of the carotid artery, nerve conduction study (NCS), electroencephalography (EEG), visual evoked potential (VEP), Lanthony test of acquired visual impairment, single photon emission computer tomography (SPECT) of the brain, neuropsychological examination and carbohydrate-deficient transferrin (CDT), a marker of chronic ethanol intake. RESULTS Mean TCDD level in 2008 was still 274.0+/-181.2 pg/g blood lipids (reference level is 2-3 pg/g). All (100%) patients had residues of chloracne/chloracne consequences, atherosclerotic changes on the eye fundus and plaques in the carotid arteries. Progression of intima-media thickness (IMT) from a mean of 0.84+/-0.14 mm in 2003 to 1.09+/-0.18 mm in 2008 was observed. Ninety-one per cents of patients had impairment in SPECT of the brain; and 55% of patients had hyperfixation of the perfusion indicator as a measure of increased neuronal activity. Additionally, 91 % of patients were treated for hyperlipidaemia, 73 % for hypertension, 55 % for diabetes type 2, 45 % for ischemic heart disease, and 36 % for psychological disorders. The Lanthony test demonstrated acquired dyschromatopsia in 80 % of patients. Mean colour confusion index (CCI) was 1.438, which indicates impairment since 2003, when the index was 1.302. CDT was in the normal range and did not correlate with CCI. Neuropsychological status appeared stabilized in all 8 patients examined, with impairment in one or more parameter (memory, attention, verbal fluency, psychomotor speed, motorics) in comparison to the norm. CONCLUSION Forty years after intoxication, the blood level of TCDD is still 100 times higher than in the general population. Other PCDD/Fs were not elevated. A high percentage of subjects suffer from neurological and vascular disorders. No association of alcohol consumption with neurological impairment was seen, and the highly significant correlation between CCI and TCDD blood concentration suggests that acquired colour impairment was associated with TCDD but not with alcohol consumption. IMT significantly increased during past 5 years. The patients obviously need complex treatment, including intense hypolipidaemic and antidepressant therapy.
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Affiliation(s)
- Daniela Pelclova
- Department of Occupational Medicine, Charles University Prague, Czech Republic.
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Pelclova D, Fenclova Z, Krmencikova M, Navratil T, Kuzma M, Kacer P. EXHALED BREATH CONDENSATE MARKERS OF OXIDANT STRESS IN PATIENTS WITH PNEUMOCONIOSES. Chest 2008. [DOI: 10.1378/chest.134.4_meetingabstracts.s6001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Klusackova P, Lebedova J, Kacer P, Kuzma M, Brabec M, Pelclova D, Fenclova Z, Navratil T. Leukotrienes and 8-isoprostane in exhaled breath condensate in bronchoprovocation tests with occupational allergens. Prostaglandins Leukot Essent Fatty Acids 2008; 78:281-92. [PMID: 18513935 DOI: 10.1016/j.plefa.2008.03.006] [Citation(s) in RCA: 18] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 03/13/2008] [Accepted: 03/24/2008] [Indexed: 11/20/2022]
Abstract
Exhaled breath condensate (EBC) contains many substances, which could help in diagnosis of occupational asthma. The aim of the study is to monitor leukotrienes (LT) and 8-isoprostane from EBC in bronchoprovocation tests with allergens in 47 patients with suspected occupational asthma. Forty-one patients were tested negative. In negative bronchoprovocation tests, no significant differences (P<0.05) were seen between the five measurements during and after the test. In control measurements (without provocation), significant differences were found among four measurements done within 24h for 8-isoprostane (P=0.0138). The relationship between the log transformed ratios of the EBC parameters and FEV(1) was never significant at the 5% level in control measurements, while in negative tests, statistical significance was recorded for LTB(4) (P=0.0299) before and 5h after the test. Six of 47 patients were tested positive. Such a small number of patients did not allow proper statistical analysis and therefore, the results are described separately for each patient.
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Affiliation(s)
- Pavlina Klusackova
- Department of Occupational Medicine, 1st Faculty of Medicine, Charles University in Prague, Na Bojisti 1, Prague 2, Czech Republic.
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Lebedova J, Klusackova P, Kacer P, Kuzma M, Pelclova D, Navratil T, Fenclova Z. MARKERS IN BREATH CONDENSATE IN PATIENTS WITH OCCUPATIONAL ASTHMA AND RHINITIS. Chest 2005. [DOI: 10.1378/chest.128.4_meetingabstracts.346s] [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: 11/01/2022] Open
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