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Lestari MI, Murti K, Liberty IA, Hafy Z, Linardi V, Khoirudin M, Umar TP. Waste anesthetic gases have a significant association with deoxyribonucleic acid (DNA) damage: A systematic review and meta-analysis of 2,732 participants. Heliyon 2023; 9:e19988. [PMID: 37810053 PMCID: PMC10559673 DOI: 10.1016/j.heliyon.2023.e19988] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 08/17/2023] [Accepted: 09/07/2023] [Indexed: 10/10/2023] Open
Abstract
Introduction Operating room workers are at risk of experiencing adverse effects due to occupational exposure to waste anesthetic gases (WAGs). One of the consequences of long-term WAGs exposure is the probability of developing deoxyribonucleic acid (DNA) damage. This systematic review investigated the link between WAGs and DNA damage in operating room workers. Methods PubMed, Science Direct, ProQuest, Scopus, and EbscoHost, as well as hand-searching, were used to find literature on the relationship between WAGs and DNA damage. Three independent reviewers independently assessed the study's quality. Meta-analysis was conducted for several DNA damage indicators, such as comet assay (DNA damage score, tail's length, tail's DNA percentage), micronuclei formation, and total chromosomal aberration. Results This systematic review included 29 eligible studies (2732 participants). The majority of the studies used a cross-sectional design. From our meta-analysis, which compared the extent of DNA damage in operating room workers to the unexposed group, operating room workers exposed to WAGs had a significantly higher DNA damage indicator, including DNA damage score, comet tail's length, comet tail's DNA percentage, micronuclei formation, and total chromosomal aberration (p < 0.05) than non-exposed group. Conclusion Waste anesthetic gases have been found to significantly impact DNA damage indicators in operating room personnel, including comet assay, micronuclei development, and chromosomal aberration. To reduce the impact of exposure, hospital and operating room personnel should take preventive measures, such as by adapting scavenger method.
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Affiliation(s)
- Mayang Indah Lestari
- Doctoral Study Program in Biomedical Science, Faculty of Medicine, Universitas Sriwijaya, Palembang, Indonesia
- Department of Anesthesiology and Intensive Therapy, Faculty of Medicine, Universitas Sriwijaya, Dr. RSUP. Mohammad Hoesin Palembang, RS. Siti Fatimah, Palembang, Indonesia
| | - Krisna Murti
- Department of Anatomical Pathology, Faculty of Medicine, Universitas Sriwijaya-RSUP Dr. Mohammad Hoesin, Palembang, Indonesia
| | - Iche Andriyani Liberty
- Department of Public Health, Faculty of Medicine, Universitas Sriwijaya, Palembang, Indonesia
| | - Zen Hafy
- Doctoral Study Program in Biomedical Science, Faculty of Medicine, Universitas Sriwijaya, Palembang, Indonesia
| | - Violantina Linardi
- Department of Anesthesiology and Intensive Therapy, Faculty of Medicine, Universitas Sriwijaya, Palembang, Indonesia
| | - Muhammad Khoirudin
- Department of Anesthesiology and Intensive Therapy, Faculty of Medicine, Universitas Sriwijaya, Palembang, Indonesia
| | - Tungki Pratama Umar
- Department of Anesthesiology and Intensive Therapy, Faculty of Medicine, Universitas Sriwijaya, Palembang, Indonesia
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Quintana-Sosa M, León-Mejía G, Narváez DM, Suarez-Arnedo A, Restrepo HGD, De Moya YS, Ruiz-Benitez M, Valencia KF, Trindade C, Miranda-Guevara A, Dias J, Henriques JAP, da Silva J. Association of buccal micronucleus cytome assay (BMNCyt) biomarkers with inorganic element concentration and genetic polymorphisms in welders. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 97:104025. [PMID: 36460284 DOI: 10.1016/j.etap.2022.104025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Welding fumes are classified as carcinogenic to humans. The aim of the present study was to measure buccal micronucleus cytome assay biomarkers and to evaluate their association with inorganic elements and genetic polymorphisms (XRCC1, OGG1, XRCC3, GSTM1, and GSTT1) in welders (n = 98) and control individuals (n = 100). Higher levels of DNA damage and cell death were observed in the exposed group. Also, a significant correlation between the frequency of micronuclei and Na, Si, Cl, Ti, Cr, Zn and Mg concentrations. The formation of micronuclei, binucleated cells, cell death was associated with polymorphisms in repair pathways. The OGG1Ser326Cys and XRCC3 241Thr/Met genotypes were associated with cell death. Individuals with GSTM1 null genotype had a higher frequency of micronuclei. These results demonstrate that the deleterious effects of exposure to welding fumes are exacerbated by lifestyle habits, and genetic polymorphisms can influence DNA damage and cell death.
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Affiliation(s)
- Milton Quintana-Sosa
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Grethel León-Mejía
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia.
| | - Diana M Narváez
- Laboratorio de Genética Humana, Universidad de los Andes, Bogotá, Colombia
| | | | | | - Yurina Sh De Moya
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Martha Ruiz-Benitez
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Karen Franco Valencia
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Cristiano Trindade
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Alvaro Miranda-Guevara
- Universidad Simón Bolívar, Facultad de Ciencias Básicas y Biomédicas, Barranquilla, Colombia
| | - Johnny Dias
- Laboratório de Implantação Iônica, Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - João Antonio Pêgas Henriques
- Programa de Pós-graduação em Biotecnologia, Universidade do Vale do Taquari - UNIVATES, Lajeado, RS, Brazil; Departamento de Biofísica, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Juliana da Silva
- Laboratório de Genética Toxicológica, Universidade Luterana do Brasil (ULBRA) & Universidade La Salle (UniLaSalle), Canoas, RS, Brazil.
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Petrashova DA, Kolomeichuk SN. Effect of Angiotensin-I Converting Enzyme Gene Insertion/Deletion Polymorphism on genome instability in children living in Russian Arctic. Klin Lab Diagn 2021; 66:635-640. [PMID: 34665951 DOI: 10.51620/0869-2084-2021-66-10-635-640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Main risks of arterial hypertension manifest in childhood. Children living in the Far North are especially susceptible to this. There is a need for an inexpensive, non-invasive and simple diagnosis of the risk of childhood pathologies. It was previously found that the genotype DD of the in/del polymorphic marker of the ACE gene is found in people at risk of developing cardiovascular pathologies. Buccal micronucleus cytome assay and genetic analysis were used in the work. In total, 77 schoolchildren from the city of Apatity, aged 15-17 years old, were examined. We have shown that carriers of the D allele have a tendency to an increase in the frequency of cells with micronuclei. In the case of homozygous I/I variant, the frequency of occurrence of cells with karyopycnosis is significantly higher than in carriers of allele D. Polymorphic marker in/del of the ACE gene is associated with apoptotic changes in the cells of the studied children. The in/del polymorphic marker of the ACE gene can be used as a prognostic marker of the processes of genome destabilization at the early stages of development of the human body.
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Affiliation(s)
| | - S N Kolomeichuk
- Karelian Science Center, Russian Academy of Sciences.,Nothern State Medical University
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Cruz JPP, Santos NCND, Pithon MM, de Morais Marcílio Cerqueira E. Biomonitoring of children and adolescents using orthodontic appliances made of acrylic resins through micronucleus testing of exfoliated buccal and palatal mucosa cells. Am J Orthod Dentofacial Orthop 2021; 160:193-199. [PMID: 33975748 DOI: 10.1016/j.ajodo.2020.03.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 03/01/2020] [Accepted: 03/01/2020] [Indexed: 10/21/2022]
Abstract
INTRODUCTION The present study aimed to investigate the occurrence of micronuclei and the degenerative nuclear alterations indicative of apoptosis and necrosis in the exfoliated buccal and palatal mucosa cells of children and adolescents using orthodontic appliances made of self-curing acrylic resins. METHODS The micronuclei and nuclear alterations were evaluated in a minimum of 2000 cells collected from the cheeks and palates of 30 patients of both sexes, aged between 6 and 12 years. The cell evaluations were performed before appliance installation and 15 to 21 days after installation. A conditional test was used. In all analyses, the significance level was 5%. RESULTS No differences in the occurrence of micronuclei or the nuclear degenerative changes indicative of apoptosis and necrosis were observed in the cheek cells between the 2 time points (P > 0.05). However, evaluation of the palate cells revealed a significant increase in the occurrence of micronuclei and the nuclear alterations indicative of apoptosis (P < 0.01) but not of karyolysis (P > 0.05). CONCLUSIONS Direct contact of orthodontic appliances made of acrylic resins with the oral mucosa increases the incidence of chromosomal damage and degenerative nuclear alterations.
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Affiliation(s)
| | | | - Matheus Melo Pithon
- Department of Health, State University of Southwestern Bahia, Jequié, Bahia, Brazil; Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Kargar-Shouroki F, Miri M, Zare Sakhvidi MJ, Hosseini Sangchi SZ, Madadizadeh F. Genotoxic effect of exposure to polycyclic aromatic hydrocarbons (PAHs) in asphalt workers. EXCLI JOURNAL 2021; 20:686-697. [PMID: 33883991 PMCID: PMC8056049 DOI: 10.17179/excli2021-3487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 03/03/2021] [Indexed: 11/10/2022]
Abstract
Asphalt workers are at risk due to exposure to asphalt fumes containing polycyclic aromatic hydrocarbons (PAHs). The main purpose of this study was to measure the urinary metabolite of PAHs and to determine its effect on micronucleus (MN) formation as an indicator of genotoxic damage. In this cross-sectional study, the MN frequency in 48 male asphalt workers exposed to PAHs was measured and compared with 48 male non-exposed employees. PAHs exposure was evaluated by determining urinary 1-Hydroxypyrene (1-OHP). The mean concentrations of 1-OHP in the exposed and non-exposed groups were 0.58 ± 0.41 μmol/mol creatinine and 0.38 ± 0.25 μmol/mol creatinine, respectively. 1-OHP concentration was significantly higher in smokers compared with non-smokers in both exposed and non-exposed groups. Moreover, the mean MN frequency in the exposed group was significantly higher than in the non-exposed group. The MN frequency was significantly higher in asphalt workers with a work history of ≥ 15 years compared to workers with lower work history. In a fully adjusted model, there was a statistically significant association between exposure to PAHs, with MN and 1-OHP concentration, and between smoking status with 1-OHP. The findings of the present study indicated that occupational exposure to PAHs was associated with increased urinary 1-OHP as well as DNA damage in the asphalt workers.
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Affiliation(s)
- Fatemeh Kargar-Shouroki
- Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Miri
- Non-Communicable Diseases Research Center, Department of Environmental Health, School of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Mohammad Javad Zare Sakhvidi
- Occupational Health Research Center, Department of Occupational Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Seyedeh Zahra Hosseini Sangchi
- Occupational Health Research Center, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Farzan Madadizadeh
- Research Center of Prevention and Epidemiology of Non-Communicable Disease, Department of Biostatistics and Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Berame JS, Alam ZF, Miguel F, Noguera L, Lapada A. Response to 'Comment on "Evaluation of Micronucleus in Exfoliated Human Buccal Epithelium Cells among E-Waste Exposed Residents in Payatas, Philippines"'. J Health Pollut 2021; 11:210310. [PMID: 33815908 PMCID: PMC8009650 DOI: 10.5696/2156-9614-11.29.210310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Julie S. Berame
- Education/Biology Department, Caraga State University, Ampayon, Butuan City, Philippines
- Biology Department, De La Salle University, Manila, Philippines
| | - Zeba F. Alam
- Biology Department, De La Salle University, Manila, Philippines
| | - Frosyl Miguel
- Biology Department, De La Salle University, Manila, Philippines
- Science and Technology Department, Ramon Magsaysay High School, Manila, Philippines
| | - Liz Noguera
- Biology Department, De La Salle University, Manila, Philippines
- Biology Department, Eastern Samar State University, Borongan City, Philippines
| | - Aris Lapada
- Biology Department, De La Salle University, Manila, Philippines
- Biology Department, Eastern Samar State University, Borongan City, Philippines
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Gaikwad AS, Mahmood R, B R, Kondhalkar S. Evaluation of telomere length and genotoxicity among asphalt associated workers. Mutat Res 2020; 858-860:503255. [PMID: 33198936 DOI: 10.1016/j.mrgentox.2020.503255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 08/21/2020] [Accepted: 08/25/2020] [Indexed: 10/23/2022]
Abstract
There are contradictory reports about bitumen exposure and malignancy risk worldwide. Also, the evidence for genotoxicity risk among workers occupationally exposed to asphalt is insufficient. The study intended to evaluate particulate matter 10 (PM10) at the workplace and biomarkers of genotoxicity effects among a group of asphalt workers in and around Bangalore, India. This study involved a total of 107 participants (54 exposed group and 53 unexposed control group). To evaluate the genotoxicity, the urinary 8-OHdG and relative telomere length as oxidative damage while micronucleus (MN) assay for cytogenetic damage was carried out during the study. The majority of workers have reported health complaints and 57.4% of them were not using any personal protective equipments (PPE's). The level of PM10 detected was 104 ± 9.5 μg/m3 and 619 ± 22.7 μg/m3 in the road paving and asphalt mixing sites respectively. The biomonitoring study observed a highly significant (p = <0.001) increase in the level of 8-hydroxy-2-deoxyguanosine (8-OHdG) in the exposed group (23.17 ± 8.65 ng/mg creatinine) compared to the control (13.6 ± 7.12 ng/mg creatinine), revealed age significant associated and non-smoking borderline significant associated for oxidative stress. The relative telomere length (TL) analysis revealed its highly significant (p = 0.004) reduction in the exposed group, adjusted mean 0.95 (95% CI 0.83-1.07) compared to the control 1.06 (95% CI 0.91-1.26). The job category (p = 0.028), non-smoking (p = 0.026), and tobacco chewing (p = 0.013) were associated with reduced relative TL in the asphalt exposed group. In cytogenotoxicity analysis, the mean micronucleus (MN) frequency per 100 cells in the exposed group (26.46 ± 19.8) was significantly (p = <0.001) increased over the control group (8.56 ± 7.18). Neither smoking habit nor age appeared to influence the MN frequencies in either group. In the present study, we have demonstrated genetic damage in workers occupationally exposed to asphalt and particulate matter, raising concern for an increased risk of malignancy in these workers.
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Affiliation(s)
- Avinash S Gaikwad
- ICMR-Regional Occupational Health Centre (Southern), ICMR Complex, Devanahalli TK, Bangalore 562 110, India.
| | - Riaz Mahmood
- Department of Biotechnology and Bioinformatics, Kuvempu University, Shimoga 577451, India.
| | - Ravichandran B
- ICMR-Regional Occupational Health Centre (Southern), ICMR Complex, Devanahalli TK, Bangalore 562 110, India.
| | - Shridhar Kondhalkar
- ICMR-Regional Occupational Health Centre (Southern), ICMR Complex, Devanahalli TK, Bangalore 562 110, India.
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Naderi NJ. Micronucleus Assay: Pitfalls and Challenges. J Cytol 2020; 37:157. [PMID: 33088039 PMCID: PMC7542046 DOI: 10.4103/joc.joc_29_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/09/2020] [Accepted: 06/09/2020] [Indexed: 11/04/2022] Open
Affiliation(s)
- Noushin Jalayer Naderi
- Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Shahed University, Tehran, Iran
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Das S, Upadhaya P, Barhoi D, Nath Barbhuiya S, Langthasa P, Giri S. GCMS analysis of sadagura (smokeless tobacco), its enhanced genomic instability causing potential due to arsenic co-exposure, and vitamin-C supplementation as a possible remedial measure: a study involving multiple model test systems. Drug Chem Toxicol 2019; 45:185-196. [DOI: 10.1080/01480545.2019.1675687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Samrat Das
- Department of Life Science and Bioinformatics, Molecular and Cell Biology Laboratory, Assam University, Silchar, India
| | - Puja Upadhaya
- Department of Life Science and Bioinformatics, Molecular and Cell Biology Laboratory, Assam University, Silchar, India
| | - Dharmeswar Barhoi
- Department of Life Science and Bioinformatics, Molecular and Cell Biology Laboratory, Assam University, Silchar, India
| | - Sweety Nath Barbhuiya
- Department of Life Science and Bioinformatics, Molecular and Cell Biology Laboratory, Assam University, Silchar, India
| | - Pimily Langthasa
- Department of Life Science and Bioinformatics, Molecular and Cell Biology Laboratory, Assam University, Silchar, India
| | - Sarbani Giri
- Department of Life Science and Bioinformatics, Molecular and Cell Biology Laboratory, Assam University, Silchar, India
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Hopf NB, Bolognesi C, Danuser B, Wild P. Biological monitoring of workers exposed to carcinogens using the buccal micronucleus approach: A systematic review and meta-analysis. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2019; 781:11-29. [DOI: 10.1016/j.mrrev.2019.02.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 02/12/2019] [Accepted: 02/28/2019] [Indexed: 01/22/2023]
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Abstract
Whole-genome and centrosome duplication as a consequence of cytokinesis failure can drive tumorigenesis in experimental model systems. However, whether cytokinesis failure is in fact an important cause of human cancers has remained unclear. In this Review, we summarize evidence that whole-genome-doubling events are frequently observed in human cancers and discuss the contribution that cytokinesis defects can make to tumorigenesis. We provide an overview of the potential causes of cytokinesis failure and discuss how tetraploid cells that are generated through cytokinesis defects are used in cancer as a transitory state on the route to aneuploidy. Finally, we discuss how cytokinesis defects can facilitate genetic diversification within the tumour to promote cancer development and could constitute the path of least resistance in tumour evolution.
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Affiliation(s)
- Susanne M A Lens
- Oncode Institute, Utrecht, Netherlands.
- Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands.
| | - René H Medema
- Oncode Institute, Utrecht, Netherlands.
- Division of Cell Biology and Cancer Genomics Center, The Netherlands Cancer Institute, Amsterdam, Netherlands.
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Linhares DPS, Garcia PV, Silva C, Barroso J, Kazachkova N, Pereira R, Lima M, Camarinho R, Ferreira T, Dos Santos Rodrigues A. DNA damage in oral epithelial cells of individuals chronically exposed to indoor radon ( 222Rn) in a hydrothermal area. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2018; 40:1713-1724. [PMID: 27830439 DOI: 10.1007/s10653-016-9893-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 10/27/2016] [Indexed: 06/06/2023]
Abstract
Hydrothermal areas are potentially hazardous to humans as volcanic gases such as radon (222Rn) are continuously released from soil diffuse degassing. Exposure to radon is estimated to be the second leading cause of lung cancer, but little is known about radon health-associated risks in hydrothermal regions. This cross-sectional study was designed to evaluate the DNA damage in the buccal epithelial cells of individuals chronically exposed to indoor radon in a volcanic area (Furnas volcano, Azores, Portugal) with a hydrothermal system. Buccal epithelial cells were collected from 33 individuals inhabiting the hydrothermal area (Ribeira Quente village) and from 49 individuals inhabiting a non-hydrothermal area (Ponta Delgada city). Indoor radon was measured with Ramon 2.2 detectors. Chromosome damage was measured by micronucleus cytome assay, and RAPD-PCR was used as a complementary tool to evaluate DNA damage, using three 10-mer primers (D11, F1 and F12). Indoor radon concentration correlated positively with the frequency of micronucleated cells (r s = 0.325, p = 0.003). Exposure to radon is a risk factor for the occurrence micronucleated cells in the inhabitants of the hydrothermal area (RR = 1.71; 95% CI, 1.2-2.4; p = 0.003). One RAPD-PCR primer (F12) produced differences in the banding pattern, a fact that can indicate its potential for detecting radon-induced specific genomic alterations. The observed association between chronic exposure to indoor radon and the occurrence of chromosome damage in human oral epithelial cells evidences the usefulness of biological surveillance to assess mutations involved in pre-carcinogenesis in hydrothermal areas, reinforcing the need for further studies with human populations living in these areas.
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Affiliation(s)
- Diana Paula Silva Linhares
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal.
- CVARG, Center for Volcanology and Geological Risks Assessment, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal.
| | - Patrícia Ventura Garcia
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
- cE3c, Centre for Ecology Evolution and Environmental Changes and Azorean Biodiversity Group, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal
| | - Catarina Silva
- CVARG, Center for Volcanology and Geological Risks Assessment, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal
- CIVISA, Center for Information and Seismovolcanic Surveillance of the Azores, University of the Azores, Ponta Delgada, Portugal
| | - Joana Barroso
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
| | - Nadya Kazachkova
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Institute for Molecular and Cell Biology (IBMC), University of Porto, Porto, Portugal
| | - Rui Pereira
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
| | - Manuela Lima
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Institute for Molecular and Cell Biology (IBMC), University of Porto, Porto, Portugal
| | - Ricardo Camarinho
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
| | - Teresa Ferreira
- Department of Geosciences, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal
- CVARG, Center for Volcanology and Geological Risks Assessment, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal
| | - Armindo Dos Santos Rodrigues
- Department of Biology, University of the Azores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Azores, Portugal
- CVARG, Center for Volcanology and Geological Risks Assessment, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal
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Alp G, Çakmak G, Sert M, Burgaz Y. Corrosion potential in artificial saliva and possible genotoxic and cytotoxic damage in buccal epithelial cells of patients who underwent Ni-Cr based porcelain-fused-to-metal fixed dental prostheses. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 827:19-26. [DOI: 10.1016/j.mrgentox.2018.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 12/19/2017] [Accepted: 01/11/2018] [Indexed: 01/04/2023]
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Farhadi S, Mohamadi M, Mohamadi M. Repair Index in Examination of Nuclear Changes in the Buccal Mucosa of Smokers: A Useful Method for Screening of Oral Cancer. Asian Pac J Cancer Prev 2017; 18:3087-3090. [PMID: 29172283 PMCID: PMC5773795 DOI: 10.22034/apjcp.2017.18.11.3087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background: Smoking is one of the major risk factors for cancers, especially in the oral cavity. Nuclear changes occur in the early stages of cancer. The aim of this study was therefore to investigate nuclear changes and calculate a “repair index” for the buccal mucosa of smokers. Material and Methods: This historical cohort study was conducted by selecting samples including smokers and non-smokers. In addition, the smoker group were divided into 2 subgroups with a smoking history of >10 and ≤10 years. Buccal mucosa smears were obtained and Papanicolaou staining was employed to detect nuclear changes. Micronuclei, karyorrhexis and karyolysis were assessed and eventually a repair index was calculated. Statistical analysis was performed using the t-test. Results: In the 60 samples studied, differences were significant in smopkers vs. nonsmokers for micronuclei, (P=0.002) but not karyorrhexis or karyolysis. (P=0.789 and P=0.578, respectively). Also, the repair index demonstrated no statistically significant variation (P=0.107). Comparison of the two subgroups of smokers demonstrated that the frequency of micronuclei in those with a history >10 years was significantly higher and the RI was significantly lower than with ≤10 years (P=0.0001 and 0.04, respectively). While karyorrhexis and karyolysis were also higher in the longer exposure individuals the differences were not significant (P=0.07 and 0.78, respectively). Conclusion: Among the nuclear changes investigated, micronuclei proved the more reliable indicator to assess the adverse effects of smoking on the oral mucosa, becoming prominent with increase in smoking history. In addition, while a “repair index” may have benefits for assessment of nuclear damage caused by smoking, further research is necessary in this field.
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Affiliation(s)
- Sareh Farhadi
- Oral and Maxillofacial Pathology Department, Dental Branch of Tehran, Islamic Azad University, Tehran, Iran.
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Kriech AJ, Schreiner CA, Osborn LV, Riley AJ. Assessing cancer hazards of bitumen emissions – a case study for complex petroleum substances. Crit Rev Toxicol 2017; 48:121-142. [DOI: 10.1080/10408444.2017.1391170] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Silvério ACP, Machado SC, Azevedo L, Nogueira DA, de Castro Graciano MM, Simões JS, Viana ALM, Martins I. Assessment of exposure to pesticides in rural workers in southern of Minas Gerais, Brazil. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 55:99-106. [PMID: 28843102 DOI: 10.1016/j.etap.2017.08.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 05/25/2017] [Accepted: 08/13/2017] [Indexed: 05/07/2023]
Abstract
The aim of the study was to assess of occupational exposure to pesticides in rural workers using genotoxicity test, bioindicators and clinical evaluation. Blood, urine and buccal samples from persons, rural workers exposed to a complex mixture of pesticides with organophosphates (n=94) and without organophosphates (n=94) were collected to compare the activities of cholinesterases, the levels of urinary dialkyl phosphates, genotoxicity data, from a cytome assay. Biomarkers were analysed by traditional/published methods Control group consisted of 50 other persons, non- occupationally exposed to pesticides from the city of Alfenas, Minas Gerais, Brazil. All subjects underwent a clinical evaluation. In the group exposed to organophosphates, the activity of acetylcholinesterase, butyrylcholinesterase and total cholinesterase was lower by 63.8%, 12.8%, and 14.8%, respectively, and 92.6% of the group had dialkyl phosphates present in their urine. The cytome assay was used to measure biomarkers of DNA damage (micronuclei and/or elimination of nuclear material by budding), cytokinetic defects (binucleated cells), and proliferative potential (basal cell) and/or cell death (condensed chromatin, karyorrhectic, pyknotic, and karyolytic cells). The group exposed to organophosphates showed significant changes in all these parameters compared to the control group and showed significant changes in budding, condensed chromatin and karyolytic cells compared with the group non-exposed to organophosphates. Data from the clinical evaluation showed significant changes in the central nervous, respiratory and auditory systems. The studied biomarkers are able to distinguish occupational and environmental exposure to pesticides and the data showed hazardous exposure to organophosphates and afforded valuable data to estimate the risk to cancer development.
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Affiliation(s)
- Alessandra Cristina Pupin Silvério
- Laboratory of Toxicants and Drugs Analysis - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil
| | - Simone Caetani Machado
- Laboratory of Toxicants and Drugs Analysis - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil
| | - Luciana Azevedo
- Laboratory Nutritional and Toxicological Analysis in vivo - LANTIN, Faculty of Nutrion, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil
| | - Denismar Alves Nogueira
- Institute of Exact Sciences- ICEX- Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil
| | | | - Juliana Savioli Simões
- Laboratory of Toxicants and Drugs Analysis - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil
| | - André Luiz Machado Viana
- Laboratory of Clinical Analysis- LACEN, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil
| | - Isarita Martins
- Laboratory of Toxicants and Drugs Analysis - LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas - Unifal-MG, 700 Gabriel Monteiro da Silva street, 37130-000, Alfenas, MG, Brazil.
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Souza KM, Braz LG, Nogueira FR, Souza MB, Bincoleto LF, Aun AG, Corrente JE, Carvalho LR, Braz JRC, Braz MG. Occupational exposure to anesthetics leads to genomic instability, cytotoxicity and proliferative changes. Mutat Res 2016; 791-792:42-48. [PMID: 27639372 DOI: 10.1016/j.mrfmmm.2016.09.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 09/03/2016] [Accepted: 09/08/2016] [Indexed: 11/28/2022]
Abstract
Data on the genotoxic and mutagenic effects of occupational exposure to the most frequently used volatile anesthetics are limited and controversial. The current study is the first to evaluate genomic instability, cell death and proliferative index in exfoliated buccal cells (EBC) from anesthesiologists. We also evaluated DNA damage and determined the concentrations of the anesthetic gases most commonly used in operating rooms. This study was conducted on physicians who were allocated into two groups: the exposed group, which consisted of anesthesiologists who had been exposed to waste anesthetic gases (isoflurane, sevoflurane, desflurane and nitrous oxide - N2O) for at least two years; and the control group, which consisted of non-exposed physicians matched for age, sex and lifestyle with the exposed group. Venous blood and EBC samples were collected from all participants. Basal DNA damage was evaluated in lymphocytes by the comet assay, whereas the buccal micronucleus (MN) cytome (BMCyt) assay was applied to evaluate genotoxic and cytotoxic effects. The concentrations of N2O and anesthetics were measured via a portable infrared spectrophotometer. The average concentration of waste gases was greater than 5 parts per million (ppm) for all of the halogenated anesthetics and was more than 170ppm for N2O, expressed as a time-weighted average. There was no significant difference between the groups in relation to lymphocyte DNA damage. The exposed group had higher frequencies of MN, karyorrhexis and pyknosis, and a lower frequency of basal cells compared with the control group. In conclusion, exposure to modern waste anesthetic gases did not induce systemic DNA damage, but it did result in genomic instability, cytotoxicity and proliferative changes, which were detected in the EBC of anesthesiologists. Thus, these professionals can be considered at risk for developing genetic alterations resulting from occupational exposure to these gases, suggesting the need to minimize this exposure.
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Affiliation(s)
- Kátina M Souza
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - Leandro G Braz
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - Flávia R Nogueira
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - Marajane B Souza
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - Lahis F Bincoleto
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - Aline G Aun
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - José E Corrente
- Instituto de Biociências de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Bioestatística, Botucatu, Brazil
| | - Lídia R Carvalho
- Instituto de Biociências de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Bioestatística, Botucatu, Brazil
| | - José Reinaldo C Braz
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil
| | - Mariana G Braz
- Faculdade de Medicina de Botucatu, UNESP - Univ Estadual Paulista, Departamento de Anestesiologia, Botucatu, Brazil.
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Nersesyan A, Parsadanyan G, Zalinyan G, Chobanyan N. Comment on the Paper by Safi Oz et al. Entitled 'Evaluation of Micronuclei, Nuclear Anomalies and the Nuclear/Cytoplasmic Ratio of Exfoliated Cervical Epithelial Cells in Genital Candidiasis'. Acta Cytol 2015; 59:429-30. [PMID: 26658725 DOI: 10.1159/000439423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 08/11/2015] [Indexed: 11/19/2022]
Affiliation(s)
- Armen Nersesyan
- Institute of Cancer Research, Internal Medicine I, Medical University of Vienna, Vienna, Austria
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Safi Oz Z, Doğan Gun B, Ozdamar SO. Why an Experienced Eye May Not Detect Micronucleated Cells Using Papanicolaou's Stain. Acta Cytol 2015; 59:431-3. [PMID: 26658559 DOI: 10.1159/000440934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 09/07/2015] [Indexed: 11/19/2022]
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Jara-Ettinger AC, López-Tavera JC, Zavala-Cerna MG, Torres-Bugarín O. Genotoxic Evaluation of Mexican Welders Occupationally Exposed to Welding-Fumes Using the Micronucleus Test on Exfoliated Oral Mucosa Cells: A Cross-Sectional, Case-Control Study. PLoS One 2015; 10:e0131548. [PMID: 26244938 PMCID: PMC4526553 DOI: 10.1371/journal.pone.0131548] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 06/03/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND An estimated 800,000 people worldwide are occupationally exposed to welding-fumes. Previous studies show that the exposure to such fumes is associated with damage to genetic material and increased cancer risk. In this study, we evaluate the genotoxic effect of welding-fumes using the Micronucleus Test on oral mucosa cells of Mexican welders. MATERIAL AND METHODS We conducted a cross-sectional, matched case-control study of n = 66 (33 exposed welders, and 33 healthy controls). Buccal mucosa smears were collected and stained with acridine orange, observed under 100x optical amplification with a fluorescence lamp, and a single-blinded observer counted the number of micronuclei and other nuclear abnormalities per 2,000 observed cells. We compared the frequencies of micronuclei and other nuclear abnormalities, and fitted generalised linear models to investigate the interactions between nuclear abnormalities and the exposure to welding-fumes, while controlling for smoking and age. RESULTS Binucleated cells and condensed-chromatin cells showed statistically significant differences between cases and controls. The frequency of micronuclei and the rest of nuclear abnormalities (lobed-nuclei, pyknosis, karyolysis, and karyorrhexis) did not differ significantly between the groups. After adjusting for smoking, the regression results showed that the occurrence of binucleated cells could be predicted by the exposure to welding-fumes plus the presence of tobacco consumption; for the condensed-chromatin cells, our model showed that the exposure to welding-fumes is the only reliable predictor. CONCLUSIONS Our findings suggest that Mexican welders who are occupationally exposed to welding-fumes have increased counts of binucleated and condensed-chromatin cells. Nevertheless, the frequencies of micronuclei and the rest of nuclear abnormalities did not differ between cases and controls. Further studies should shed more light on this subject.
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Affiliation(s)
| | | | | | - Olivia Torres-Bugarín
- Faculty of medicine, International Program, Universidad Autónoma de Guadalajara, Zapopan, Jalisco, Mexico
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Mirowsky J, Gordon T. Noninvasive effects measurements for air pollution human studies: methods, analysis, and implications. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2015; 25:354-80. [PMID: 25605444 PMCID: PMC6659729 DOI: 10.1038/jes.2014.93] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/26/2014] [Accepted: 11/05/2014] [Indexed: 05/09/2023]
Abstract
Human exposure studies, compared with cell and animal models, are heavily relied upon to study the associations between health effects in humans and air pollutant inhalation. Human studies vary in exposure methodology, with some work conducted in controlled settings, whereas other studies are conducted in ambient environments. Human studies can also vary in the health metrics explored, as there exists a myriad of health effect end points commonly measured. In this review, we compiled mini reviews of the most commonly used noninvasive health effect end points that are suitable for panel studies of air pollution, broken into cardiovascular end points, respiratory end points, and biomarkers of effect from biological specimens. Pertinent information regarding each health end point and the suggested methods for mobile collection in the field are assessed. In addition, the clinical implications for each health end point are summarized, along with the factors identified that can modify each measurement. Finally, the important research findings regarding each health end point and air pollutant exposures were reviewed. It appeared that most of the adverse health effects end points explored were found to positively correlate with pollutant levels, although differences in study design, pollutants measured, and study population were found to influence the magnitude of these effects. Thus, this review is intended to act as a guide for researchers interested in conducting human exposure studies of air pollutants while in the field, although there can be a wider application for using these end points in many epidemiological study designs.
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Affiliation(s)
- Jaime Mirowsky
- Department of Environmental Medicine, New York University School of Medicine, Nelson Institute of Environmental Medicine, Tuxedo, New York, USA
| | - Terry Gordon
- Department of Environmental Medicine, New York University School of Medicine, Nelson Institute of Environmental Medicine, Tuxedo, New York, USA
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Wultsch G, Nersesyan A, Kundi M, Wagner KH, Ferk F, Jakse R, Knasmueller S. Impact of exposure to wood dust on genotoxicity and cytotoxicity in exfoliated buccal and nasal cells. Mutagenesis 2015; 30:701-9. [PMID: 25958389 DOI: 10.1093/mutage/gev034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Wood dust was classified by the IARC as a human carcinogen which causes sinonasal tumours. However, the exposure in different industries varies strongly and the risks of workers depend on the specific situation which can be assessed by the use of biomonitoring methods. The aim of this study was to investigate the workers who are exposed to low dust levels (below the permitted concentrations) with cytogenetic and biochemical methods. Micronuclei (MNi) which are indicative for genomic damage, nuclear buds which reflect gene amplification, binucleated cells which are caused by mitotic disturbances and acute cytotoxicity parameters (pyknosis, karyorrhexis, condensed chromatin, karyolysis) were monitored in buccal and nasal cells of workers of a veneer factory (n = 51) who are exposed to volatile wood-derived compounds, in carpenters of a furniture factory which use no synthetic chemicals (n=38) and in a control group (n = 65). Additionally, markers were measured in blood plasma which reflect inflammations (C-reactive protein, CRP) and the redox status, namely malondialdehyde (MDA) and oxidised low density proteins (oxLDL). No induction of micronucleated cells was observed in both epithelia in the two exposure groups while all other nuclear anomalies except pyknosis were increased; also one health-related biochemical marker (MDA) was significantly elevated in the workers. Taken together, the results of our study show that exposure to low levels of wood dust does not cause formation of MNi indicating that the cancer risks of the workers are not increased as a consequence of genetic damage while positive results were obtained in earlier studies with workers who are exposed to high dust levels. However, our findings indicate that wood dust causes cytotoxic effects which may lead to inflammations.
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Affiliation(s)
- Georg Wultsch
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria, Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria, Department of Nutritional Sciences, University of Vienna , Althanstrasse 14, 1090 Vienna, Austria, Private Clinics Leech, 8010 Graz, Austria
| | - Armen Nersesyan
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria, Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria, Department of Nutritional Sciences, University of Vienna , Althanstrasse 14, 1090 Vienna, Austria, Private Clinics Leech, 8010 Graz, Austria
| | - Michael Kundi
- Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Karl-Heinz Wagner
- Department of Nutritional Sciences, University of Vienna , Althanstrasse 14, 1090 Vienna, Austria
| | - Franziska Ferk
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria, Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria, Department of Nutritional Sciences, University of Vienna , Althanstrasse 14, 1090 Vienna, Austria, Private Clinics Leech, 8010 Graz, Austria
| | | | - Siegfried Knasmueller
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria, Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria, Department of Nutritional Sciences, University of Vienna , Althanstrasse 14, 1090 Vienna, Austria, Private Clinics Leech, 8010 Graz, Austria
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Ramos MA, Cury FDP, Scapulatempo Neto C, Marques MMC, Silveira HCS. Micronucleus evaluation of exfoliated buccal epithelial cells using liquid-based cytology preparation. Acta Cytol 2014; 58:582-8. [PMID: 25402342 DOI: 10.1159/000366224] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 07/29/2014] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Micronuclei (MN) are biomarkers that can be applied to buccal epithelial cells to assess populations occupationally exposed to potentially carcinogenic agents. Liquid-based cytology (LBC) is a way to improve and refine the results obtained by this test. STUDY DESIGN Exfoliated buccal cells were collected from 40 subjects (20 construction workers from the Barretos Cancer Hospital and 20 administrative staff from the same institution). LBC and three stains (Feulgen/fast green, Papanicolaou and Giemsa) were used to prepare the slides. Student's t test was applied for statistical comparisons of the data. A p value of <0.05 was considered statistically significant. RESULTS Regardless of the stain employed, the frequency of MN was greater in the case group (Feulgen/fast green: 5.15; Papanicolaou: 29; Giemsa: 26) than in the control group (Feulgen/fast green: 2.30; Papanicolaou: 17; Giemsa: 15). CONCLUSIONS Using LBC to prepare slides and evaluate the frequency of MN potentially serves as a screening option for more comprehensive studies of cancer risk among populations occupationally exposed to potentially carcinogenic agents. In addition, the residual fluid enables the preparation of slides for DNA-specific stains that can be compared to those with Papanicolaou stain.
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Cytogenetic abnormality in exfoliated cells of buccal mucosa in head and neck cancer patients in the Tunisian population: impact of different exposure sources. BIOMED RESEARCH INTERNATIONAL 2013; 2013:905252. [PMID: 23957010 PMCID: PMC3727183 DOI: 10.1155/2013/905252] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 06/11/2013] [Indexed: 12/12/2022]
Abstract
Chromosome/DNA instability could be one of the primary causes of malignant cell transformation. The objective of the present study was to evaluate the spontaneous genetic damages in exfoliated cells of buccal mucosa of head and neck cancer (HNC) by counting micronucleus (MN) and binucleated (BN) cells frequencies. MN and BN frequencies were significantly increased in HNC patients compared with controls (5.53 ± 3.09/1000 cells, 5.63 ± 2.99/1000 cells versus 2.36 ± 2.11/1000 cells, 3.09 ± 1.82/1000 cells, P < 0.001). Regarding the gender and the age, the frequencies of the MN and BN were significantly higher than those of controls (P < 0.01). The evaluation of the MN and BN frequencies revealed a significant increase (P < 0.001) in the cases in relation to the control group after controlling the risk factors (tobacco smoking and chewing and occupational exposure) of HNC. Moreover, MN and BN frequencies were significantly increased in smokers and chewers compared with nonsmokers and nonchewers among patients (P < 0.05). MN frequency was significantly (P = 0.014) different between patients occupationally exposed (6.99 ± 3.40/1000 cells) and nonexposed (4.70 ± 2.48/1000 cells) among HNC group. The logistic regression model illustrated that HNC was significantly associated with frequencies of MN (OR = 8.63, P < 0.0001) and BN (OR = 5.62, P = 0.001). Our results suggest that increased chromosome/DNA instabilities may be associated with HNC.
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