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Imran I, Moin SF, Saleem S, Azhar A, Zehra S. Bioaccumulation of Chloropyrifos Organo-pesticide and Its Toxicogenic Association with Antioxidant GSTP1 in Pakistani Pest Control Workers. Appl Biochem Biotechnol 2024; 196:3331-3343. [PMID: 37646887 DOI: 10.1007/s12010-023-04649-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2023] [Indexed: 09/01/2023]
Abstract
Synthetic pesticides are employed to enhance agricultural production. Chronic exposure to organophosphate (OP) pesticides may be a source of health problems. The present study was designed to examine an association of GSTP1 (rs1695) polymorphism with OP pesticide chronic exposure. A case-control study was recruited with 250 subjects comprising exposed (n = 100) and controls (n = 150). A survey was conducted to determine the pesticide type to which workers had exposed. According to recorded survey assessment, two compounds of OP pesticides chloropyrifos and malathion were investigated in the blood samples of exposed study subjects using high-performance liquid chromatography (HPLC). For screening of genetic polymorphism in GSTP1 (rs1695) polymerase chain reaction, restriction length polymorphism (PCR-RFLP) and agarose gel electrophoresis were performed. Statistically, data were analyzed using SPSS v. 20.0 and MedCal© software. Total chrom© navigator programmer was used for detection of OP residues in serum and local pesticide solution. chloropyrifos-OP pesticide residues were detected in serum of estimated chronically exposed subjects at 206 nm HPLC optimal conditions. The pattern of GSTP1 (rs1695) genotypic frequencies depicted that heterozygous genotype was higher in Chloropyrifos exposed subjects (0.56) when compared with controls (0.44). Statistical outcomes showed an insignificant association with GSTP1 (rs1695) polymorphism and chloropyrifos-OP pesticide toxicity (Fisher's exact test 1.0, p = 0.25). An insignificant allelic investigation reflected a protective effect of mutant allele G against chloropyrifos-OP pesticide toxicity in exposed subjects. Findings may be helpful in identifying bioaccumulated pesticide residues, but in studied Pakistani exposed workers, no significant association of GSTP1 (rs1695) variant with chloropyrifos-OPs was demonstrated.
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Affiliation(s)
- Iffat Imran
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan.
- Ziauddin University Faculty of Engineering, Science, Technology and Management (ZUFESTM), Department of Biomedical Engineering, Block B, North Nazimabad, Karachi, F-10374600, Pakistan.
| | - Syed Faraz Moin
- Dr. Zafar H. Zaidi Center for Proteomics, University of Karachi, Karachi, 75270, Pakistan
| | - Saima Saleem
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
| | - Abid Azhar
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
| | - Sitwat Zehra
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
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Aldana-Salazar F, Rangel N, Rodríguez MJ, Baracaldo C, Martínez-Agüero M, Rondón-Lagos M. Chromosomal Damage, Chromosome Instability, and Polymorphisms in GSTP1 and XRCC1 as Biomarkers of Effect and Susceptibility in Farmers Exposed to Pesticides. Int J Mol Sci 2024; 25:4167. [PMID: 38673753 PMCID: PMC11050655 DOI: 10.3390/ijms25084167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 03/05/2024] [Accepted: 03/11/2024] [Indexed: 04/28/2024] Open
Abstract
In the department of Boyacá, Colombia, agriculture stands as one of the primary economic activities. However, the escalating utilization of pesticides within this sector has sparked concern regarding its potential correlation with elevated risks of genotoxicity, chromosomal alterations, and carcinogenesis. Furthermore, pesticides have been associated with a broad spectrum of genetic polymorphisms that impact pivotal genes involved in pesticide metabolism and DNA repair, among other processes. Nonetheless, our understanding of the genotoxic effects of pesticides on the chromosomes (as biomarkers of effect) in exposed farmers and the impact of genetic polymorphisms (as susceptibility biomarkers) on the increased risk of chromosomal damage is still limited. The aim of our study was to evaluate chromosomal alterations, chromosomal instability, and clonal heterogeneity, as well as the presence of polymorphic variants in the GSTP1 and XRCC1 genes, in peripheral blood samples of farmers occupationally exposed to pesticides in Aquitania, Colombia, and in an unexposed control group. Our results showed statistically significant differences in the frequency of numerical chromosomal alterations, chromosomal instability, and clonal heterogeneity levels between the exposed and unexposed groups. In addition, we also found a higher frequency of chromosomal instability and clonal heterogeneity in exposed individuals carrying the heterozygous GSTP1 AG and XRCC1 (exon 10) GA genotypes. The evaluation of chromosomal alterations and chromosomal instability resulting from pesticide exposure, combined with the identification of polymorphic variants in the GSTP1 and XRCC1 genes, and further research involving a larger group of individuals exposed to pesticides could enable the identification of effect and susceptibility biomarkers. Such markers could prove valuable for monitoring individuals occupationally exposed to pesticides.
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Affiliation(s)
- Fernando Aldana-Salazar
- School of Biological Sciences, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia; (F.A.-S.); (M.J.R.)
| | - Nelson Rangel
- Departamento de Nutrición y Bioquímica, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia
| | - María José Rodríguez
- School of Biological Sciences, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia; (F.A.-S.); (M.J.R.)
| | - César Baracaldo
- Doctoral Program in Biological and Environmental Sciences, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia;
| | - María Martínez-Agüero
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá 110231, Colombia;
| | - Milena Rondón-Lagos
- School of Biological Sciences, Universidad Pedagógica y Tecnológica de Colombia, Tunja 150003, Colombia; (F.A.-S.); (M.J.R.)
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Ladeira C, Møller P, Giovannelli L, Gajski G, Haveric A, Bankoglu EE, Azqueta A, Gerić M, Stopper H, Cabêda J, Tonin FS, Collins A. The Comet Assay as a Tool in Human Biomonitoring Studies of Environmental and Occupational Exposure to Chemicals-A Systematic Scoping Review. TOXICS 2024; 12:270. [PMID: 38668493 PMCID: PMC11054096 DOI: 10.3390/toxics12040270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/31/2024] [Accepted: 04/02/2024] [Indexed: 04/29/2024]
Abstract
Biomonitoring of human populations exposed to chemical substances that can act as potential mutagens or carcinogens, may enable the detection of damage and early disease prevention. In recent years, the comet assay has become an important tool for assessing DNA damage, both in environmental and occupational exposure contexts. To evidence the role of the comet assay in human biomonitoring, we have analysed original research studies of environmental or occupational exposure that used the comet assay in their assessments, following the PRISMA-ScR method (preferred reporting items for systematic reviews and meta-analyses extension for scoping reviews). Groups of chemicals were designated according to a broad classification, and the results obtained from over 300 original studies (n = 123 on air pollutants, n = 14 on anaesthetics, n = 18 on antineoplastic drugs, n = 57 on heavy metals, n = 59 on pesticides, and n = 49 on solvents) showed overall higher values of DNA strand breaks in the exposed subjects in comparison with the unexposed. In summary, our systematic scoping review strengthens the relevance of the use of the comet assay in assessing DNA damage in human biomonitoring studies.
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Affiliation(s)
- Carina Ladeira
- H&TRC-Health & Technology Research Center, ESTeSL-Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, 1990-096 Lisbon, Portugal
- NOVA National School of Public Health, Public Health Research Centre, Universidade NOVA de Lisboa, 1600-560 Lisbon, Portugal
| | - Peter Møller
- Department of Public Health, Section of Environmental Health, University of Copenhagen, 1172 Copenhagen, Denmark;
| | - Lisa Giovannelli
- Department NEUROFARBA, Section Pharmacology and Toxicology, University of Florence, 50121 Florence, Italy;
| | - Goran Gajski
- Division of Toxicology, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (G.G.); (M.G.)
| | - Anja Haveric
- Institute for Genetic Engineering and Biotechnology, University of Sarajevo, 71000 Sarajevo, Bosnia and Herzegovina;
| | - Ezgi Eyluel Bankoglu
- Institute of Pharmacology and Toxicology, University of Würzburg, 97078 Würzburg, Germany; (E.E.B.); (H.S.)
| | - Amaya Azqueta
- Department of Pharmaceutical Sciences, School of Pharmacy and Nutrition, University of Navarra, 31009 Pamplona, Spain;
| | - Marko Gerić
- Division of Toxicology, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia; (G.G.); (M.G.)
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Würzburg, 97078 Würzburg, Germany; (E.E.B.); (H.S.)
| | - José Cabêda
- Guarda Nacional Republicana, Destacamento Territorial de Vila Franca de Xira, Núcleo de Proteção Ambiental, 1500-124 Lisbon, Portugal;
| | - Fernanda S. Tonin
- Pharmaceutical Care Research Group, Universidad de Granada, 18012 Granada, Spain;
| | - Andrew Collins
- Department of Nutrition, University of Oslo, 0316 Oslo, Norway;
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Alves AA, Laurinho K, Franco FC, de Araujo Nascimento F, Nunes HF, de Melo E Silva D. The Incidence of the XRCC1 rs25487 and PON1 rs662 Polymorphisms in a Population from Central Brazil: Patterns in an Area with a High Level of Agricultural Activity. Biochem Genet 2023; 61:1675-1703. [PMID: 36725786 DOI: 10.1007/s10528-023-10337-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 01/17/2023] [Indexed: 02/03/2023]
Abstract
In Brazil, high levels of agricultural activity are reflected in the consumption of enormous amounts of pesticides. The production of grain in Brazil has been estimated at 289.8 million tons in the 2022 harvest, an expansion of 14.7% compared with 2021. These advances are likely associated with a progressive increase in the occupational exposure of a population to pesticides. The Paraoxonase 1 gene (PON1) is involved in liver detoxification; the rs662 variant of this gene modifies the activity of the enzyme. The repair of pesticide-induced genetic damage depends on the protein produced by the X-Ray Repair Cross-Complementing Group 1 gene (XRCC). Its function is impaired due to an rs25487 variant. The present study describes the frequencies of the rs662 and rs25487 and their haplotypes in a sample population from Goiás, Brazil. It compares the frequencies with other populations worldwide to verify the variation in the distribution of these SNPs, with 494 unrelated individuals in the state of Goiás. The A allele of the rs25487 variant had a frequency of 26% in the Goiás population, and the modified rs662 G allele had a frequency of 42.8%. Four haplotypes were recorded for the rs25487 (G > A) and rs662 (A > G) markers, with a frequency of 11.9% being recorded for the A-G haplotype (both modified alleles), 30.8% for the G-G haplotype, 14.3% for the A-A haplotype, and 42.8% for the G-A haplotype (both wild-type alleles). We demonstrated the distribution of important SNPs associated with pesticide exposure in an area with a high agricultural activity level, Central Brazil.
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Affiliation(s)
- Alessandro Arruda Alves
- Mutagenesis Laboratory, Graduate Program in Genetics and Molecular Biology, Federal University of Goias, Goiânia, Go, Brazil
| | - Késsia Laurinho
- Mutagenesis Laboratory, Graduate Program in Genetics and Molecular Biology, Federal University of Goias, Goiânia, Go, Brazil
| | - Fernanda Craveiro Franco
- Animal Virology Laboratory, Institute of Tropical Pathology, Federal University of Goias, Goiânia, Go, Brazil
| | - Felipe de Araujo Nascimento
- Mutagenesis Laboratory, Graduate Program in Genetics and Molecular Biology, Federal University of Goias, Goiânia, Go, Brazil
| | - Hugo Freire Nunes
- Mutagenesis Laboratory, Graduate Program in Genetics and Molecular Biology, Federal University of Goias, Goiânia, Go, Brazil
| | - Daniela de Melo E Silva
- Mutagenesis Laboratory, Graduate Program in Genetics and Molecular Biology, Federal University of Goias, Goiânia, Go, Brazil.
- Laboratory of Genetics and Biodiversity, Graduate Program in Genetics and Molecular Biology, Federal University of Goias, Goiânia, Go, Brazil.
- Mutagenesis Laboratory, Campus Samambaia, Genetics Department, Institute of Biological Sciences, Federal University of Goiás, Estrada do Campus, s/n, Goiania, GO, CEP: 74690900, Brazil.
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Saad-Hussein A, Shahy EM, Ibrahim KS, Mahdy-Abdallah H, Taha MM, Abdel-Shafy EA, Shaban EE. Influence of GSTM1, T1 genes polymorphisms on oxidative stress and liver enzymes in rural and urban pesticides-exposed workers. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2022; 77:800-808. [PMID: 35014941 DOI: 10.1080/19338244.2021.2025024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Several studies discussed the relationship between the toxicity of organophosphates (OPs) and carbamates pesticides and oxidative stress which affects human health. This study aimed to evaluate the effects of pesticides on the induction of oxidative stress and hepatotoxicity. It was also focused on glutathione-S-transferase gene polymorphism in the modulation of these effects. In addition, the role of the educational level of exposed workers was studied. Acetylcholinesterase (AChE), butyrylcholinesterase (BuChE), liver enzymes, malondialdehyde (MDA), reduced glutathione (GSH), superoxide dismutase (SOD), and glutathione S transferase (GST) were estimated at 100 pesticide-exposed workers (50 urban researchers (UE) and 50 rural sprayers (RE)), and 100 matched controls (50 urban controls (UC)and 50 rural controls (RC)). AChE and BuChE were decreased in RE and UE compared to RC. Aspartate aminotransferase (AST) and alkaline phosphatase (ALP) activity were elevated in UE and UC compared to the RE and RC. Alanine aminotransferase (ALT) was elevated in UE compared to RE. MDA in RE and UE showed elevation compared to RC. There was a significant reduction in the levels of GSH, GST, and GPx in UE compared to RE and RC. The most sensitive pesticide-induced hepatotoxicity group were exposed workers with the GSTT1 genotype. Within these workers, ALT and ALP were significantly correlated with MDA and inversely correlated with AChE and BuChE, while AST was inversely correlated with AChE and BuChE only in UE. Conclusion: GST gene polymorphisms appeared to have a significant role in workers' susceptibility to hepatotoxic effects due to occupational exposure to pesticides; GSTT1 was the most sensitive genotype.
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Affiliation(s)
- Amal Saad-Hussein
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
| | - Eman M Shahy
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
| | - Khadiga S Ibrahim
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
| | - Heba Mahdy-Abdallah
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
| | - Mona M Taha
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
| | - Ebtesam A Abdel-Shafy
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
| | - Eman E Shaban
- Environmental and Occupational Medicine Department, National Research Centre, Giza, Egypt
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6
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Nascimento FDA, Silva DDME, Pedroso TMA, Ramos JSA, Parise MR. Farmers exposed to pesticides have almost five times more DNA damage: a meta-analysis study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:805-816. [PMID: 34342827 DOI: 10.1007/s11356-021-15573-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/15/2021] [Indexed: 06/13/2023]
Abstract
We carried out a meta-analytical review of possible DNA damage resulting from occupational exposure to pesticides in farmers in the scientific literature. After the search, screening, and eligibility criteria steps, we included 42 studies to analyze random effect calculation. DNA damage in farmers occupationally exposed to pesticides represents an effect of SMD 4.63 [CI 95% 3.94-5.32; p <0.001]. We observed a high heterogeneity rate between the studies and an asymmetry of the bias analysis results. We performed a meta-regression on the parameters. The Olive Tail Moment (OTM) was the most effective comet assay parameter in the evaluated studies. The Damage Index (DI) was more conservative and highlighted the variability between studies caused by distinct methodologies that showed more significant effects and greater deviations. An analysis of confounding factors demonstrated a slight DNA damage in smokers who were occupationally exposed to pesticides compared to nonsmokers, indicating genotoxicity but smaller than the pesticide effect. The present study shows the greater risk that occupationally exposed rural workers have of developing related diseases due to pesticides' genotoxic effect.
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Affiliation(s)
- Felipe de Araújo Nascimento
- Mutagenesis Laboratory, Department of Genetics, Institute of Biological Sciences, Postgraduate Program in Genetics and Molecular Biology, Federal University of Goiás, ICB I-Room 218/228, Campus Universitário, CEP, Goiânia, GO, 74690-900, Brazil.
| | - Daniela de Melo E Silva
- Mutagenesis Laboratory, Department of Genetics, Institute of Biological Sciences, Postgraduate Program in Genetics and Molecular Biology, Federal University of Goiás, ICB I-Room 218/228, Campus Universitário, CEP, Goiânia, GO, 74690-900, Brazil
| | - Thays Millena Alves Pedroso
- Mutagenesis Laboratory, Department of Genetics, Institute of Biological Sciences, Postgraduate Program in Genetics and Molecular Biology, Federal University of Goiás, ICB I-Room 218/228, Campus Universitário, CEP, Goiânia, GO, 74690-900, Brazil
| | - Jheneffer Sonara Aguiar Ramos
- Mutagenesis Laboratory, Department of Genetics, Institute of Biological Sciences, Postgraduate Program in Genetics and Molecular Biology, Federal University of Goiás, ICB I-Room 218/228, Campus Universitário, CEP, Goiânia, GO, 74690-900, Brazil
| | - Michelle Rocha Parise
- Mutagenesis Laboratory, Department of Genetics, Institute of Biological Sciences, Postgraduate Program in Genetics and Molecular Biology, Federal University of Goiás, ICB I-Room 218/228, Campus Universitário, CEP, Goiânia, GO, 74690-900, Brazil
- Department of Pharmacology, Graduate Program in Genetics and Molecular Biology, Federal University of Jataí, Jataí, GO, Brazil
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Usman M, Priya K, Pandit S, Gupta P. Cancer risk and nullity of Glutathione-S-transferase mu and theta 1 in occupational pesticide workers. Curr Pharm Biotechnol 2021; 23:932-945. [PMID: 34375184 DOI: 10.2174/1389201022666210810092342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 06/16/2021] [Accepted: 06/16/2021] [Indexed: 12/08/2022]
Abstract
Occupational exposure to pesticides has been associated with adverse health conditions, including genotoxicity and cancer. Nullity of GSTT1/GSTM1 increases the susceptibility of pesticide workers to these adverse health effects due to lack of efficient detoxification process created by the absence of these key xenobiotic metabolizing enzymes. However, this assertion does not seem to maintain its stance at all the time; some pesticide workers with the null genotypes do not present the susceptibility. This suggests the modulatory role of other confounding factors, genetic and environmental conditions. Pesticides, aggravated by the null GSTT1/GSTM1, cause genotoxicity and cancer through oxidative stress and miRNA dysregulation. Thus, the absence of these adverse health effects together with the presence of null GSTT1/GSTM1 genotypes demands further explanation. Also, understanding the mechanism behind the protection of cells - that are devoid of GSTT1/GSTM1 - from oxidative stress constitutes a great challenge and potential research area. Therefore, this review article highlights the recent advancements in the presence and absence of cancer risk in occupational pesticide workers with GSTT1 and GSTM1 null genotypes.
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Affiliation(s)
- Muhammad Usman
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, KP-III, Greater Noida- 201310 [U.P.], India
| | - Kanu Priya
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, KP-III, Greater Noida- 201310 [U.P.], India
| | - Soumya Pandit
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, KP-III, Greater Noida- 201310 [U.P.], India
| | - Piyush Gupta
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, KP-III, Greater Noida- 201310 [U.P.], India
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Pyrethroid exposure: as determinant of CYP1A1 and GSTP1 genetic variations in occupationally exposed Sindh farmers. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00698-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Abdel-Shafy EA. Antioxidant status in pesticides-exposed agricultural workers. Toxicology 2021. [DOI: 10.1016/b978-0-12-819092-0.00005-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Santillán-Sidón P, Pérez-Morales R, Anguiano G, Ruiz-Baca E, Osten JRV, Olivas-Calderón E, Vazquez-Boucard C. Glutathione S-transferase activity and genetic polymorphisms associated with exposure to organochloride pesticides in Todos Santos, BCS, Mexico: a preliminary study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:43223-43232. [PMID: 32734539 DOI: 10.1007/s11356-020-10206-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
The objective of this study was to identify and evaluate the impact of exposure to mixtures of organochloride pesticides (OCPs) in agricultural workers by detecting their effects on the activity of the enzyme glutathione S-transferase (GST) and the presence of polymorphisms of the GSTT1 and GSTM1 genes. The presence of OCPs was identified and quantified by gas chromatography, while spectrophotometry was used to measure enzymatic GST activity. The frequencies of the GSTM1 genotypes were analyzed by multiplex PCR. A total of 18 metabolites of OCPs were identified in the workers' blood, most of which are either prohibited (DDT and its metabolites p, p'DDD and p, p'DDE, dieldrin, endrin, aldrin) and/or restricted (δ hexachlorocyclohexane, cis chlordane, methoxychlor, and endosulfan). The results obtained indicate lower levels of GST activity at higher OCPs concentrations detected in blood from exposed workers, together with an increase in OCP levels in individuals who presented the GSTT1*0 and GSTM1*0 genotypes. These conditions place the detoxification process in agricultural workers with null polymorphisms in the GST genes and high concentrations of OCPs in the blood (especially DDT and its metabolites, DDD and DDE) at risk, and increase their susceptibility to develop serious diseases.
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Affiliation(s)
- Patricia Santillán-Sidón
- Molecular Biomedicine Laboratory, Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango, Av. Veterinarias s/n, Circuito Universitario, 34120, Durango, Mexico
| | - Rebeca Pérez-Morales
- Molecular Cell Biology Laboratory, Universidad Juárez del Estado de Durango, Av. Articulo #123 Filadelfia, CP 35010, Gómez Palacio, Durango, Mexico
| | - Gerardo Anguiano
- Molecular Biomedicine Laboratory, Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango, Av. Veterinarias s/n, Circuito Universitario, 34120, Durango, Mexico
| | - Estela Ruiz-Baca
- Genoproteomic Laboratory, Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango, Av. Veterinarias s/n, Circuito Universitario, 34120, Durango, Mexico
| | - Jaime Rendón-Von Osten
- Laboratory of Identification of Persistent Organic Pollutants. EPOMEX, Universidad Autónoma de Campeche, Agustín de Melgar y Juan de la Barrera s/n, 24039, Campeche, Mexico
| | - Edgar Olivas-Calderón
- Molecular Cell Biology Laboratory, Universidad Juárez del Estado de Durango, Av. Articulo #123 Filadelfia, CP 35010, Gómez Palacio, Durango, Mexico
| | - Celia Vazquez-Boucard
- Proteomic and Genetic Toxicology Laboratory, Centro de Investigaciones Biológicas del Noroeste, Instituto Politécnico Nacional, Calle IPN, #195 Playa Palo de Santa Rita Sur, 23096, La Paz, Baja California Sur, Mexico.
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Ahluwalia M, Kaur A. Assessment of chromosomal aberrations among agricultural workers exposed to pesticides in Punjab, India. J Biochem Mol Toxicol 2020; 35:e22646. [PMID: 33049096 DOI: 10.1002/jbt.22646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/08/2020] [Accepted: 09/22/2020] [Indexed: 11/07/2022]
Abstract
Chromosomal aberrations (CAs) are an important tool for assessment of exposure to pesticides. Genotoxic potential of pesticides is a principal risk factor for long-term health effects. The present study was aimed toward the assessment of CAs among agricultural workers exposed to pesticides and comparison with nonagricultural workers not exposed to pesticides. A total of 296 subjects were enrolled in the study: exposed (n = 148) and nonexposed subjects (n = 148) from Punjab. A significantly high frequency of aberrations was seen in peripheral blood lymphocytes of exposed subjects as compared with nonexposed ones. Most CAs were present as loss (aneuploidy) and were observed significantly in subjects having a history of alcohol consumption. It can be, thus, concluded that agricultural workers exposed to a mixture of pesticides, in addition to being alcoholic, are at a greater risk of genotoxic damage. It is highly recommended that the agricultural workers are educated regarding the potential hazards of occupational exposure to pesticides.
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Affiliation(s)
- Meenakshi Ahluwalia
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Anupam Kaur
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab, India
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Hernández-Toledano DS, Estrada-Muñiz E, Vega L. Genotoxicity of the organophosphate pesticide malathion and its metabolite dimethylthiophosphate in human cells in vitro. Mutat Res 2020; 856-857:503233. [PMID: 32928373 DOI: 10.1016/j.mrgentox.2020.503233] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 01/04/2023]
Abstract
Organophosphate (OP) pesticides are biotransformed into metabolites such as dialkylphosphates (DAPs). We have evaluated the genotoxicity of malathion and its metabolite dimethylthiophosphate (DMTP) in the human hepatic cell lines HepG2 and WRL-68 and in peripheral blood mononuclear cells (PBMC). In the Cytokinesis-Block Micronucleus assay (CBMN), malathion and DMTP increased the frequencies of micronuclei (MN) and nucleoplasmic bridges (NPB). Malathion was primarily clastogenic whereas DMTP was aneuploidogenic. When HepG2 or WRL-68 cells were treated with DMTP in the presence of sulconazole, a non-specific cytochrome P450 inhibitor, MN frequency was reduced, indicating that DMTP genotoxicity requires P450-cataliyzed metabolism.
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Affiliation(s)
- David Sebastián Hernández-Toledano
- Department of Toxicology, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, C.P. 07360, Gustavo A. Madero Mexico City, Mexico
| | - Elizabet Estrada-Muñiz
- Department of Toxicology, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, C.P. 07360, Gustavo A. Madero Mexico City, Mexico
| | - Libia Vega
- Department of Toxicology, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, C.P. 07360, Gustavo A. Madero Mexico City, Mexico.
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Ratna MG, Nugrahaningsih DAA, Sholikhah EN, Dwianingsih EK, Malueka RG. The association between PON1 and GSTM1 genetic variation with methylation of p16 gene promoter among Javanese farmers exposed to pesticides at Magelang Regency, Central Java, Indonesia. Heliyon 2020; 6:e03993. [PMID: 32478190 PMCID: PMC7248662 DOI: 10.1016/j.heliyon.2020.e03993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 12/11/2019] [Accepted: 05/12/2020] [Indexed: 12/08/2022] Open
Abstract
Occupational exposure to pesticides leads to the development of cancer. Aberrant DNA methylation plays a crucial role in cancer. The manifestation of the carcinogenic effect of pesticides could be determined by the variation of genes encoding enzyme, including PON1 Q192R and GSTM1. The goal of this study was to find out polymorphism of PON1 Q192R and methylation of p16 gene promoter, and their correlation on Javanese farmers in the agricultural area of Ngablak Subdistrict, Magelang Regency, Central Java. Seventy-eight pesticide-exposed farmers enrolled in the study. Polymorphism of PON Q192R was determined using PCR-RFLP and variation of GSTM1 was examined using conventional PCR. The methylation of the p16 gene promoter was determined using methylation-specific PCR. The result revealed 94.9% polymorphism of PON1 Q192R, which was higher in the R/R (Arg/Arg) genotypes than Q/R (Gln/Arg) and lowest in Q/Q (Gln/Gln) genotypes. We also found 82.1% GSTM1 null genotype among the farmers enrolled in the study. As many as 26.9% methylations of p16 gene promoter were found among farmers. Genetic variation of PON1 Q192R and GSTM1 were not found to be correlated to the methylation status of p16 gene promoter in the Javanese population.
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Affiliation(s)
- Maya G Ratna
- Master of Biomedical Science Program, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Dwi A A Nugrahaningsih
- Department of Pharmacology and Therapy, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia.,Genetics Working Group, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Indonesia
| | - Eti N Sholikhah
- Department of Pharmacology and Therapy, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Ery K Dwianingsih
- Department of Anatomical Pathology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia.,Genetics Working Group, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Indonesia
| | - Rusdy G Malueka
- Department of Neurology, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia.,Genetics Working Group, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Indonesia
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Barrón Cuenca J, Tirado N, Barral J, Ali I, Levi M, Stenius U, Berglund M, Dreij K. Increased levels of genotoxic damage in a Bolivian agricultural population exposed to mixtures of pesticides. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 695:133942. [PMID: 31756860 DOI: 10.1016/j.scitotenv.2019.133942] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/13/2019] [Accepted: 08/14/2019] [Indexed: 05/25/2023]
Abstract
During the past decades, farmers in low to middle-income countries have increased their use of pesticides, and thereby the risk of being exposed to potentially genotoxic chemicals that can cause adverse health effects. Here, the aim was to investigate the correlation between exposure to pesticides and genotoxic damage in a Bolivian agricultural population. Genotoxic effects were assessed in peripheral blood samples by comet and micronucleus (MN) assays, and exposure levels by measurements of 10 urinary pesticide metabolites. Genetic susceptibility was assessed by determination of null frequency of GSTM1 and GSTT1 genotypes. The results showed higher MN frequency in women and farmers active ≥8 years compared to their counterpart (P < 0.05). In addition, age, GST genotype, alcohol consumption, and type of water source influenced levels of genotoxic damage. Individuals with high exposure to tebuconazole, 2,4-D, or cyfluthrin displayed increased levels of genotoxic damage (P < 0.05-0.001). Logistic regression was conducted to evaluate associations between pesticide exposure and risk of genotoxic damage. After adjustment for confounders, a significant increased risk of DNA strand breaks was found for high exposure to 2,4-D, odds ratio (OR) = 1.99 (P < 0.05). In contrast, high exposure to pyrethroids was associated with a reduced risk of DNA strand breaks, OR = 0.49 (P < 0.05). It was also found that high exposure to certain mixtures of pesticides (containing mainly 2,4-D or cyfluthrin) was significantly associated with increased level and risk of genotoxic damage (P < 0.05). In conclusion, our data show that high exposure levels to some pesticides is associated with an increased risk of genotoxic damage among Bolivian farmers, suggesting that their use should be better controlled or limited.
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Affiliation(s)
- Jessika Barrón Cuenca
- Institute of Environmental Medicine, Unit of Biochemical Toxicology, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden; Genetic Institute, Medicine Faculty, Universidad Mayor de San Andrés, Saavedra Av. 2246 Miraflores, La Paz, Bolivia
| | - Noemí Tirado
- Genetic Institute, Medicine Faculty, Universidad Mayor de San Andrés, Saavedra Av. 2246 Miraflores, La Paz, Bolivia.
| | - Josue Barral
- Genetic Institute, Medicine Faculty, Universidad Mayor de San Andrés, Saavedra Av. 2246 Miraflores, La Paz, Bolivia
| | - Imran Ali
- Institute of Environmental Medicine, Unit of Biochemical Toxicology, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden
| | - Michael Levi
- Institute of Environmental Medicine, Unit of Metals and Health, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden
| | - Ulla Stenius
- Institute of Environmental Medicine, Unit of Biochemical Toxicology, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden
| | - Marika Berglund
- Institute of Environmental Medicine, Unit of Biochemical Toxicology, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden
| | - Kristian Dreij
- Institute of Environmental Medicine, Unit of Biochemical Toxicology, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden.
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15
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Massabayeva M, Chaizhunusova N, Aukenov N, Bulegenov T, Apsalikov B, Shapihanova A, Zhunussov Y. Association of radiation risk in the second and third generations with polymorphisms in the genes CYP1A1, CYP2E1, GSTP1 and changes in the thyroid. Mol Med 2019; 25:48. [PMID: 31726965 PMCID: PMC6854756 DOI: 10.1186/s10020-019-0117-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 10/30/2019] [Indexed: 11/24/2022] Open
Abstract
Background To study the association of radiation risk in the 2nd –3rd generations with polymorphisms in the genes CYP1A1, CYP2E1, GSTP1 and changes in the thyroid. Methods 5 polymorphic gene variants (rs1048943, rs4646421, rs2070676, rs3813867, rs1695) were studied in 399 people living in the East Kazakhstan region in this research. 248 people of the 2nd - 3rd generation lived in the territory with radiation exposure in Abai, Borodulikha areas, and 151 people the comparison group lived in Kurchum district without radiation exposure comparable in sex and age with control group. Results The results show that there is a significant association of rs1048943 in exposed and unexposed groups (p < 0.003), and the absence of association of rs4646421, rs2070676, rs3813867, rs1695 in the studied groups. The mean value of thyroxine in carriers of the AG + GG genotype of rs4646421 is significantly lower than in AA genotype carriers (p = 0.04); no significant changes were found in genotypes’ distribution with thyroid-stimulating hormone and anti-thyroid peroxidase indicators. Significant changes were in levels of anti-thyroid peroxidase between exposed and unexposed groups (p = 0.007). The thyroxine - thyroid-stimulating hormone levels were not significantly different in exposed and unexposed groups (p > 0.3). Conclusions This study demonstrated the association of rs1048943 polymorphism with living in the radiation zone in the 2nd and 3rd generations for the first time. Thyroxine levels decrease was identified in the 2nd and 3rd generation residents of the exposed area, as well as a significant increase of anti-thyroid peroxidase occurs in individuals of the 2nd and 3rd generation living in areas with radiation exposure.
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Affiliation(s)
| | | | - Nurlan Aukenov
- Department of Health and Human Resources, Ministry of Health of the Republic of Kazakhstan, Nur-Sultan, Kazakhstan
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Effects of Genetic Polymorphism on Susceptibility to Nephrotoxic Properties of BTEXs Compounds. J Occup Environ Med 2019; 60:e377-e382. [PMID: 29851738 DOI: 10.1097/jom.0000000000001364] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE The aim of this study was to ascertain whether genetic polymorphism affects susceptibility of individuals to nephrotoxic potentials of benzene, toluene, ethyl-benzene, and xylenes (BTEXs). METHODS Fifty BTEXs exposed workers with one or more abnormal parameter of kidney function and 232 referent subjects, with similar exposure history, free from any abnormal kidney parameters were investigated. Atmospheric concentrations of BTEXs were measured. In addition, genetic polymorphisms were determined by multiplex polymerase chain reaction (PCR) and PCR-restriction fragment length polymorphism (RFLP). RESULTS The frequencies of GSTP1 Ile-Val/Val-Val, null GSTT1, and null GSTT1/GSTM1 genotypes and mean values of blood urea nitrogen and plasma creatinine were significantly higher, while average glomerular filtration rate was significantly lower in cases than in referent subjects. CONCLUSION These findings indicate that individuals carrying null GSTT1 or null GSTT1/GSTM1 are more susceptible to nephrotoxic properties of BTEXs compounds.
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The role of phase I and II genetic polymorphisms, smoking, alcohol and cancer family history, in the risk of developing testicular cancer. Pharmacogenet Genomics 2019; 29:159-166. [PMID: 31107374 DOI: 10.1097/fpc.0000000000000379] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Testicular cancer (TCa) is a malignant tumor with highest incidence and mortality rates in Chile. The genes coding for cytochrome P450, glutathione-S-transferases (GSTs), and UDP glucuronyl transferases (UGT) participate in the biotransformation and detoxification of xenobiotics. Mutations in these genes have been associated with a high incidence of various types of cancer and an increased risk of presenting adverse reactions to drugs. OBJECTIVE The aim of this study was to relate the presence of genetic polymorphisms in cytochrome P450 1A1 (CYP1A1), CYP3A4, GSTM1, GSTP1, GSTT1, and UGT1A1 genes and nongenetic factors with the risk of developing TCa. METHODS A total of 276 volunteers from the Chilean general population and 251 Chilean TCa patients were recruited for the study. Genotypic analyses were performed using qPCR and PCR-RFLP. RESULTS Variant alleles found to increase the risk of developing TCa were CYP1A1*2C (rs1048943), GSTP1 (rs1695), and GSTT1null, especially when in conjunction with a cancer family history and/or a smoking habit. The results of the multivariate analysis showed that the presence of variant alleles of GSTP1 (rs1695) together with a smoking habit and a family history of cancer accounted for a 15.9% risk of developing TCa in the Chilean population. CYP1A1*2C, GSTM1null, GSTT1null, and GSTP1 (rs1695) are statistically related to the risk of appearance of TCa, alone or associated with nongenetic factors. CONCLUSION Therefore, phase I and II variant alleles might be useful in evaluating susceptibility to TCa in the studied population.
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Serrano-Medina A, Ugalde-Lizárraga A, Bojorquez-Cuevas MS, Garnica-Ruiz J, González-Corral MA, García-Ledezma A, Pineda-García G, Cornejo-Bravo JM. Neuropsychiatric Disorders in Farmers Associated with Organophosphorus Pesticide Exposure in a Rural Village of Northwest México. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E689. [PMID: 30813607 PMCID: PMC6427808 DOI: 10.3390/ijerph16050689] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/12/2019] [Accepted: 02/18/2019] [Indexed: 12/22/2022]
Abstract
This study aims to determine the degree of acetylcholinesterase inhibition and neurological symptoms for each of the psychiatric disorders diagnosed in the farm workers of a rural population in the state of Baja California, Mexico. We conducted a cross-sectional study on 140 agricultural workers (exposed participants). The study was run using the Mini International Neuropsychiatric Interview Diagnostic Test (MINI), a pre-established questionnaire to diagnose the mental state of each agricultural worker. Analysis of enzymatic activity was carried out using the modified Ellman method. The results showed that, among agricultural workers with slightly inhibited enzymatic activity, 25% met the criteria for the diagnosis of major depression with suicidal attitudes, 23.9% with inhibited enzymatic activity showed generalized anxiety, 23.5% showed combined depression⁻anxiety, and 22% met the criteria for major depression and no psychiatric diagnosis disorder. These results suggest the need for the development of effective public-health strategies to inform farm workers about integrated pesticide management in order to prevent serious health complications.
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Affiliation(s)
- Aracely Serrano-Medina
- Facultad de Medicina y Psicología, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - Angel Ugalde-Lizárraga
- Facultad de Medicina y Psicología, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - Michelle Stephanie Bojorquez-Cuevas
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - Jatniel Garnica-Ruiz
- Facultad de Medicina y Psicología, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - Martín Alexis González-Corral
- Facultad de Medicina y Psicología, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - Arnold García-Ledezma
- Facultad de Medicina y Psicología, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - Gisela Pineda-García
- Facultad de Medicina y Psicología, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
| | - José Manuel Cornejo-Bravo
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, Tijuana 22300, Mexico.
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Kargar Shouroki F, Neghab M, Mozdarani H, Alipour H, Yousefinejad S, Fardid R. Genotoxicity of inhalational anesthetics and its relationship with the polymorphisms of GSTT1, GSTM1, and GSTP1 genes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:3530-3541. [PMID: 30519912 DOI: 10.1007/s11356-018-3859-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
Due to their wide applications, concern exists regarding possible genotoxic effects of inhalational anesthetics (IAs) among operating room personnel. This study was undertaken to examine genotoxic properties of co-exposure to nitrous oxide, sevoflurane, and isoflurane on induction of micronucleus (MN) and chromosomal aberrations (CAs) and to determine whether any associations exist between polymorphisms of GST genes and the level of genomic damage measured by MN and CAs assays. Sixty operating room personnel and 60 unexposed referent nurses were studied. The workers' exposure to the IAs was determined. DNA damage was evaluated by MN and CAs assays. Additionally, the GSTM1, GSTT1, and GSTP1 polymorphisms were detected. The mean concentrations of nitrous oxide, isoflurane, and sevoflurane were found to be 850.92 ± 919.78, 2.40 ± 0.86, and 0.18 ± 0.14 ppm, respectively. The frequency of MN and CAs in the exposed group was significantly higher than that of the non-exposed group. The frequency of MN was significantly higher in referent nurses with null GSTT1, compared to referent nurses with positive GSTT1. The frequency of MN was significantly higher in exposed individuals carrying the combined genotype of GSTT1 (-), GSTM1 (-), and GSTP1 AG as compared with subjects carrying a combination of GSTT1 (+), GSTM1 (+), and GSTP1 AA. Statistically significant associations were noted between exposure to the IAs, gender, and the combination of the three GSTs genotypes with MN frequency. These findings indicate that inhalation exposure to IAs induces genotoxic response and the polymorphisms of GSTs genes might modulate the effect of exposure to IAs on MN.
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Affiliation(s)
| | - Masoud Neghab
- Department of Occupational Health Engineering, Research Center for Health Sciences, Institute of Health, School of Health, Shiraz University of Medical Sciences, P.O. Box: 71645-111, Shiraz, Iran.
| | - Hossein Mozdarani
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hamzeh Alipour
- Research Center for Health Sciences, Institute of health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeed Yousefinejad
- Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Fardid
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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Re: Genetic Polymorphism on Susceptibility to Nephrotoxic Properties of BTEXs Compounds. J Occup Environ Med 2018; 60:e560-e561. [PMID: 30059357 DOI: 10.1097/jom.0000000000001406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ahluwalia M, Kaur A. Modulatory role of GSTT1 and GSTM1 in Punjabi agricultural workers exposed to pesticides. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:11981-11986. [PMID: 29450776 DOI: 10.1007/s11356-018-1459-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 02/01/2018] [Indexed: 06/08/2023]
Abstract
Glutathione S-transferases are important detoxification enzymes involved in the metabolism of endogenous as well as exogenous compounds. Individuals differ in metabolic capacity due to inherited genetic variations. Due to the polymorphism exhibited by GSTT1 and GSTM1 that results in the complete loss of function, the present study was aimed towards the determination of the frequency distribution of GSTT1 and GSTM1 in agricultural workers in Punjab, India. The study aimed to investigate their contribution in susceptibility to increased disease risk. A total of 513 subjects were included in this study, out of which 250 were agriculture workers and 263 were non-exposed occupationally. GSTT1 and GSTM1 null-genotype distribution was analyzed through multiplex-PCR method. Complete gene deletion in either of the genes was strongly associated with an increased risk (OR = 1.8; 95% CI = 1.3-2.6; p < 0.0008) of DNA/cytogenetic damage, cancer, infertility, and many other serious health effects. Therefore, homozygous deletion in GSTT1 or GSTM1 could play a modulatory role in health of workers with long-term exposure to pesticides.
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Affiliation(s)
| | - Anupam Kaur
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, India.
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Hematological Abnormality, Oxidative Stress, and Genotoxicity Induction in the Greenhouse Pesticide Sprayers; Investigating the Role of NQO1 Gene Polymorphism. TOXICS 2018; 6:toxics6010013. [PMID: 29414880 PMCID: PMC5874786 DOI: 10.3390/toxics6010013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 02/01/2018] [Accepted: 02/05/2018] [Indexed: 01/24/2023]
Abstract
The widespread use of pesticides in agriculture represents a threat to the human populations exposed to them. In this cross-sectional study, the hematological and biochemical parameters, plasma cholinesterase (PChE) activity, oxidative stress, genotoxicity, and NAD(P)H: quinone oxidoreductase 1 (NQO1) C609T polymorphism were measured in 100 greenhouse workers occupationally exposed to pesticide mixture and 104 normal healthy controls. There was a decrease in erythrocytes (5.45%, p = 0.026) and hemoglobin (3.26%, p = 0.025), and an increase in mean corpuscular hemoglobin (3.54%, p = 0.013) in the exposed workers. Sprayers showed a reduction in PChE (23%) and GSH (50%) levels, and an increase in lipid peroxidation (LPO) (55%), protein carbonyl (145%), Superoxide dismutase activity (61%), and total antioxidant capacity (35%) (p < 0.001 for all parameters but LPO: p = 0.009). Genotoxicity parameters were significantly high in the exposed cases (for all parameters: p < 0.001 but tail length: p = 0.002). There was a significant correlation between oxidative stress and genotoxicity parameters, and also between these biomarkers and PChE activity. The NQO1 C609T polymorphism was not significantly associated with studied biomarkers. The findings indicate that occupational exposure to a mixture of pesticides can induce hematotoxicity, oxidative stress, and genotoxicity in greenhouse workers.
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Glass T, Dalvie MA, Holtman Z, Vorster AA, Ramesar RS, London L. DNA variants and organophosphate neurotoxicity among emerging farmers in the Western Cape of South Africa. Am J Ind Med 2018; 61:11-20. [PMID: 29143350 DOI: 10.1002/ajim.22790] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2017] [Indexed: 11/06/2022]
Abstract
BACKGROUND Previous epidemiological studies investigating modification of organophosphate (OP) neurotoxicity by xenobiotic metabolizing enzymes (XMEs) polymorphisms have produced inconsistent results. METHODS A cross-sectional study of 301 emerging farmers was conducted. Neurotoxicity testing included forward and backward recall, digit span, and vibration sensitivity testing. Questionnaire data included demography, potential confounders, and work history of pesticide exposures. Genomic DNA was analyzed from study participants for DNA variants of two glutathione S-transferases (GSTM1 and GSTT1), N-acetyltransferase 2 (NAT2), and Paraoxonase 1 (PON1). RESULTS There was evidence of OP pesticide neurotoxicity modification by rs1799931 (NAT2), rs662 (PON1), and the null allele of GSTM1 in multivariate analysis. The strongest evidence of modification was observed for rs1799931 (NAT2) on the relationship between pesticide poisoning and impaired vibration sense. CONCLUSIONS DNA variants of NAT2, PON1, and GSTM1 may modify OP neurotoxicity, and this requires further exploration.
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Affiliation(s)
- Tracy Glass
- School of Public Health and Family Medicine; University of Cape Town; Centre for Environmental and Occupational Health Research (CEOHR); Cape Town Western Cape South Africa
| | - Mohamed A. Dalvie
- School of Public Health and Family Medicine; University of Cape Town; Centre for Environmental and Occupational Health Research (CEOHR); Cape Town Western Cape South Africa
| | - Zelda Holtman
- School of Public Health and Family Medicine; University of Cape Town; Centre for Environmental and Occupational Health Research (CEOHR); Cape Town Western Cape South Africa
| | - Anna A. Vorster
- MRC Human Genetics Research Unit; Division of Human Genetics; Institute for Infectious Diseases and Molecular Medicine; Faculty of Health Sciences; Department of Pathology; University of Cape Town; Cape Town South Africa
| | - Rajkumar S. Ramesar
- MRC Human Genetics Research Unit; Division of Human Genetics; Institute for Infectious Diseases and Molecular Medicine; Faculty of Health Sciences; Department of Pathology; University of Cape Town; Cape Town South Africa
| | - Leslie London
- School of Public Health and Family Medicine; University of Cape Town; Centre for Environmental and Occupational Health Research (CEOHR); Cape Town Western Cape South Africa
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Nourozi MA, Neghab M, Bazzaz JT, Nejat S, Mansoori Y, Shahtaheri SJ. Association between polymorphism of GSTP1, GSTT1, GSTM1 and CYP2E1 genes and susceptibility to benzene-induced hematotoxicity. Arch Toxicol 2017; 92:1983-1990. [PMID: 29204680 PMCID: PMC6002464 DOI: 10.1007/s00204-017-2104-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 10/24/2017] [Indexed: 11/24/2022]
Abstract
Occupational exposure to benzene has been associated with leukemia, anemia, leukopenia, and thrombocytopenia. Genetic susceptibility to benzene toxicity in humans may be related to variations in benzene metabolizing genes. The main objective of this study was to ascertain whether polymorphism of GSTP1, GSTM1, GSTT1 and CYP2E1 genes might influence susceptibility to the adverse effects of benzene among employees of a petrochemical plant. In this cross-sectional study, 124 employees of a petrochemical plant who had been occupationally exposed to benzene and had one or more abnormal hematological parameter (cases) and 184 subjects with a similar exposure scenario, free from any abnormal hematological parameters (referent) were studied. Atmospheric concentrations of benzene were measured and GSTM1 and GSTT1 genotypes were evaluated using the multiplex polymerase chain reaction (PCR) technique. Additionally, GSTP1 and CYP2E1 genotypes were determined by PCR- restriction fragment length polymorphism (PCR–RFLP). The frequency of null GSTT1 genotype in cases was significantly higher than that of referent group (32.3 vs. 18.5%, OR 2.1, 95% CI 1.23–3.56, p = 0.004). The mean value of platelets in subjects with null GSTT1 genotype was significantly lower than that of individuals with positive GSTT1 genotype (p = 0.015). Conversely, the mean value of leukocytes was significantly higher in subjects with null GSTM1 genotype as compared to those with positive GSTM1 genotype (p = 0.026). Logistic regression analysis showed that, subjects with null GSTT1 genotype had a significantly higher risk for hematological disorders, as compared to those with positive GSTT1 genotype (OR 2.1, 95% CI 1.23–3.56). Moreover, subjects with both null GSTT1 and GSTM1 genotypes had a significantly higher risk for hematological disorders as compared to subjects with positive GSTT1 and GSTM1 genotypes (OR 2.35, 95% CI 1.14–4.8). The results of this study showed that, individuals carrying null GSTT1 or both null STT1 and GSTM1 genotypes had a higher risk and were more susceptible to benzene-induced hematological disorders.
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Affiliation(s)
- Mohamad Amin Nourozi
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Neghab
- Department of Occupational Health Engineering, Research Center for Health Sciences, Institute of Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Javad Tavakkoly Bazzaz
- Department of Medical Genetics, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Saharnaz Nejat
- Department of Epidemiology and Biostatistics, School of Public Health, Knowledge Utilization Research Center (KURC), Tehran University of Medical Sciences, Tehran, Iran
| | - Yaser Mansoori
- Non-communicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
| | - Seyed Jamaleddin Shahtaheri
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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GSTP1 and XRCC1 polymorphisms and DNA damage in agricultural workers exposed to pesticides. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2017. [DOI: 10.1016/j.mrgentox.2017.05.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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KAUR GURPREET, JAIN AK, SINGH SANDEEP. CYP/PON genetic variations as determinant of organophosphate pesticides toxicity. J Genet 2017; 96:187-201. [DOI: 10.1007/s12041-017-0741-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Perumalla Venkata R, Rahman MF, Mahboob M, Indu Kumari S, Chinde S, M. B, Dumala N, Grover P. Assessment of genotoxicity in female agricultural workers exposed to pesticides. Biomarkers 2016; 22:446-454. [DOI: 10.1080/1354750x.2016.1252954] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - M. F. Rahman
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - M. Mahboob
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - S. Indu Kumari
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - Srinivas Chinde
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - Bhanuramya M.
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - Naresh Dumala
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - Paramjit Grover
- Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad, Telangana, India
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Franco FC, Alves AA, Godoy FR, Avelar JB, Rodrigues DD, Pedroso TMA, da Cruz AD, Nomura F, de Melo E Silva D. Evaluating genotoxic risks in Brazilian public health agents occupationally exposed to pesticides: a multi-biomarker approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:19723-19734. [PMID: 27406225 DOI: 10.1007/s11356-016-7179-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 07/04/2016] [Indexed: 06/06/2023]
Abstract
This is the first study demonstrating genotoxic effects and whole transcriptome analysis on community health agents (CHAs) occupationally exposed to pesticides in Central Brazil. For the transcriptome analysis, we found some genes related to Alzheimer's disease (LRP1), an insulin-like growth factor receptor (IGF2R), immunity genes (IGL family and IGJ), two genes related to inflammatory reaction (CXCL5 and CCL3), one gene related to maintenance of cellular morphology (NHS), one gene considered to be a strong apoptosis inductor (LGALS14), and several transcripts of the neuroblastoma breakpoint family (NBPF). Related to comet assay, we demonstrated a significant increase in DNA damage, measured by the olive tail moment (OTM), in the exposed group compared to the control group. Moreover, we also observed a statistically significant difference in OTM values depending on GSTM1 genotypes. Therefore, Brazilian epidemiological surveillance, an organization responsible for the assessment and management of health risks associated to pesticide exposure to CHA, needs to be more proactive and considers the implications of pesticide exposure for CHA procedures and processes.
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Affiliation(s)
- Fernanda Craveiro Franco
- Programa de Pós-Graduação em Genética e Biologia Molecular, Laboratório de Mutagênese e Radiobiologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Alessandro Arruda Alves
- Programa de Pós-Graduação em Genética e Biologia Molecular, Laboratório de Mutagênese e Radiobiologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Fernanda Ribeiro Godoy
- Núcleo de Pesquisas Replicon, Departamento de Biologia, Pontifícia Universidade Católica de Goiás, Goiânia, Goiás, Brazil
| | - Juliana Boaventura Avelar
- Programa de Pós-Graduação em Genética e Biologia Molecular, Laboratório de Mutagênese e Radiobiologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Douglas Dantas Rodrigues
- Núcleo de Pesquisas Replicon, Departamento de Biologia, Pontifícia Universidade Católica de Goiás, Goiânia, Goiás, Brazil
| | - Thays Millena Alves Pedroso
- Programa de Pós-Graduação em Genética e Biologia Molecular, Laboratório de Mutagênese e Radiobiologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Aparecido Divino da Cruz
- Núcleo de Pesquisas Replicon, Departamento de Biologia, Pontifícia Universidade Católica de Goiás, Goiânia, Goiás, Brazil
| | - Fausto Nomura
- Campus II, Itatiaia, Departamento de Genética, Instituto de Ciências Biológicas 1, Universidade Federal de Goiás, Goiânia, Goiás, Cep 74001-970, Brazil
| | - Daniela de Melo E Silva
- Programa de Pós-Graduação em Genética e Biologia Molecular, Laboratório de Mutagênese e Radiobiologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
- Campus II, Itatiaia, Departamento de Genética, Instituto de Ciências Biológicas 1, Universidade Federal de Goiás, Goiânia, Goiás, Cep 74001-970, Brazil.
- Programa de Pós-Graduação em Ciências Ambientais, Laboratório de Mutagênese e Radiobiologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
- Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
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Gómez-Martín A, Hernández AF, Martínez-González LJ, González-Alzaga B, Rodríguez-Barranco M, López-Flores I, Aguilar-Garduno C, Lacasana M. Polymorphisms of pesticide-metabolizing genes in children living in intensive farming communities. CHEMOSPHERE 2015; 139:534-540. [PMID: 26318115 DOI: 10.1016/j.chemosphere.2015.07.079] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 06/04/2023]
Abstract
Polymorphisms in genes encoding xenobiotic-metabolizing enzymes (XME) are important parameters accounting for the wide inter-individual variability to environmental exposures. Paraoxonase-1 (PON1), butyrylcholinesterase (BChE) and Cytochrome-P450 constitute major classes of XME involved in the detoxification of pesticide chemicals, in particular organophosphates. This study explored the allelic frequency, linkage disequilibrium and haplotype analysis of ten common polymorphic variants of seven key genes involved in organophosphate metabolism (BCHE-K, BCHE-A, PON1 Q192R, PON1 L55M, PON1 -108C/T, CYP2C19 G681A, CYP2D6 G1846A, CYP3AP1 -44G/A, GSTM1∗0 and GSTT1∗0) in a children population living near an intensive agriculture area in Spain. It was hypothesized that individuals with unfavorable combinations of gene variants will be more susceptible to adverse effects from organophosphate exposure. Genomic DNA from 496 healthy children was isolated and amplified by PCR. Hydrolysis probes were used for the detection of eight specific SNPs and two copy number variants (CNVs) by using TaqMan® Assay-based real-time PCR. Frequencies of SNPs and CNVs in the target genes were in Hardy-Weinberg equilibrium and broadly consistent with European populations. Linkage disequilibrium was found between the three PON1 genetic polymorphisms studied and between BCHE-K and BCHE-A. The adverse genotype combination (unusual BCHE variants, PON1 55MM/-108TT and null genotype for both GSTM1 and GSTT1) potentially conferring a greater genetic risk from exposure to organophosphates was observed in 0.2% of our study population. This information allows broadening our knowledge about differential susceptibility toward environmental toxicants and may be helpful for further research to understand the inter-individual toxicokinetic variability in response to organophosphate pesticides exposure.
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Affiliation(s)
- Antonio Gómez-Martín
- Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain; Center GENYO (Pfizer-University of Granada-Andalusian Government Center for Genomics and Oncological Research), Granada, Spain
| | - Antonio F Hernández
- Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain.
| | - Luis Javier Martínez-González
- Center GENYO (Pfizer-University of Granada-Andalusian Government Center for Genomics and Oncological Research), Granada, Spain
| | - Beatriz González-Alzaga
- Andalusian School of Public Health (EASP), Granada, Spain; Institute of Biosanitary Research (ibs.GRANADA), University Hospitals/University of Granada, Granada, Spain
| | - Miguel Rodríguez-Barranco
- Andalusian School of Public Health (EASP), Granada, Spain; Institute of Biosanitary Research (ibs.GRANADA), University Hospitals/University of Granada, Granada, Spain
| | | | | | - Marina Lacasana
- Andalusian School of Public Health (EASP), Granada, Spain; Institute of Biosanitary Research (ibs.GRANADA), University Hospitals/University of Granada, Granada, Spain; CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
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HapMap-based study on the association between MPO and GSTP1 gene polymorphisms and lung cancer susceptibility in Chinese Han population. Acta Pharmacol Sin 2014; 35:636-44. [PMID: 24786234 DOI: 10.1038/aps.2014.11] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 01/24/2014] [Indexed: 11/08/2022] Open
Abstract
AIM Myeloperoxidase (MPO) and glutathione S-transferase pi 1 (GSTP1) are important carcinogen-metabolizing enzymes. The aim of this study was to investigate the association between the common polymorphisms of MPO and GSTP1 genes and lung cancer risk in Chinese Han population. METHODS A total of 266 subjects with lung cancer and 307 controls without personal history of the disease were recruited in this case control study. The tagSNPs approach was used to assess the common polymorphisms of MOP and GSTP1 genes and lung cancer risk according to the disequilibrium information from the HapMap project. The tagSNP rs7208693 was selected as the polymorphism site for MPO, while the haplotype-tagging SNPs rs1695, rs4891, rs762803 and rs749174 were selected as the polymorphism sites for GSTP1. The gene polymorphisms were confirmed using real-time PCR, cloning and sequencing. RESULTS The four GSTP1 haplotype-tagging SNPs rs1695, rs4891, rs762803 and rs749174, but not the MPO tagSNP rs7208693, exhibited an association with lung cancer susceptibility in smokers in the overall population and in the studied subgroups. When Phase 2 software was used to reconstruct the haplotype for GSTP1, the haplotype CACA (rs749174+rs1695 + rs762803+rs4891) exhibited an increased risk of lung cancer among smokers (adjust odds ratio 1.53; 95%CI 1.04-2.25, P=0.033). Furthermore, diplotype analyses demonstrated that the significant association between the risk haplotype and lung cancer. The risk haplotypes co-segregated with one or more biologically functional polymorphisms and corresponded to a recessive inheritance model. CONCLUSION The common polymorphisms of the GSTP1 gene may be the candidates for SNP markers for lung cancer susceptibility in Chinese Han population.
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Godoy FR, Costa EOA, da Silva Reis AA, Batista MP, de Melo AV, Gonçalves MW, Cruz AS, de Araújo Melo CO, Minasi LB, Ribeiro CL, da Cruz AD, de Melo E Silva D. Do GSTT1 and GSTM1 polymorphisms influence intoxication events in individuals occupationally exposed to pesticides? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3706-3712. [PMID: 24281680 DOI: 10.1007/s11356-013-2349-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 11/04/2013] [Indexed: 06/02/2023]
Abstract
This study evaluated the variability of GSTM1 and GSTT1 polymorphisms in individuals occupationally exposed to pesticides in ten Goias municipalities that present intense agricultural activity. We evaluated blood samples of 235 individuals, which 120 were rural workers occupationally exposed to pesticides and 115 formed the control group, analyzing GST polymorphisms by quantitative polymerase chain reaction (qPCR).The exposed group consisted of 111 men and nine women only getting an average of 39 ± 9 years. These workers were from ten rural municipalities situated at Goias state. It was found that 18 % of the exposed individuals had the GSTT1 null genotype and 49 % had the GSTM1 null genotype, and 10 % had both null genotypes. Data as intoxication (42 %), use of Personal Protection Equipment (PPE; 52 %) and if the worker prepared the pesticide (7 %), or if just applied the pesticide (22 %) or if the worker prepared and applied (71 %) have all been correlated with genetic polymorphisms. There were no statistically significant differences between the GSTM1 and GSTT1 polymorphisms between control and exposed groups. Finally, we could not associate a null GSTT1 or null GSTM1 polymorphisms or both to intoxication events caused by pesticides, but instead we presented the importance to use PPE to prevent such harm, once we found a statistically significant association between the use of PPE and events of intoxication (p ≤ 0.001).
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Is organic farming safer to farmers' health? A comparison between organic and traditional farming. Toxicol Lett 2014; 230:166-76. [PMID: 24576785 DOI: 10.1016/j.toxlet.2014.02.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 02/13/2014] [Accepted: 02/14/2014] [Indexed: 11/23/2022]
Abstract
Exposure to pesticides is a major public health concern, because of the widespread distribution of these compounds and their possible long term effects. Recently, organic farming has been introduced as a consumer and environmental friendly agricultural system, although little is known about the effects on workers' health. The aim of this work was to evaluate genetic damage and immunological alterations in workers of both traditional and organic farming. Eighty-five farmers exposed to several pesticides, thirty-six organic farmers and sixty-one controls took part in the study. Biomarkers of exposure (pyrethroids, organophosphates, carbamates, and thioethers in urine and butyrylcholinesterase activity in plasma), early effect (micronuclei in lymphocytes and reticulocytes, T-cell receptor mutation assay, chromosomal aberrations, comet assay and lymphocytes subpopulations) and susceptibility (genetic polymorphisms related to metabolism - EPHX1, GSTM1, GSTT1 and GSTP1 - and DNA repair-XRCC1 and XRCC2) were evaluated. When compared to controls and organic farmers, pesticide farmers presented a significant increase of micronuclei in lymphocytes (frequency ratio, FR=2.80) and reticulocytes (FR=1.89), chromosomal aberrations (FR=2.19), DNA damage assessed by comet assay (mean ratio, MR=1.71), and a significant decrease in the proportion of B lymphocytes (MR=0.88). Results were not consistent for organic farmers when compared to controls, with a 48% increase of micronuclei in lumphocytes frequency (p=0.016) contrasted by the significant decreases of TCR-Mf (p=0.001) and %T (p=0.001). Our data confirm the increased presence of DNA damage in farmers exposed to pesticides, and show as exposure conditions may influence observed effects. These results must be interpreted with caution due to the small size of the sample and the unbalanced distribution of individuals in the three study groups.
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Evaluation of pesticide-induced oxidative stress from a gene–environment interaction perspective. Toxicology 2013; 307:95-102. [DOI: 10.1016/j.tox.2012.09.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 08/13/2012] [Accepted: 09/18/2012] [Indexed: 11/20/2022]
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Roco A, Quiñones L, Agúndez JAG, García-Martín E, Squicciarini V, Miranda C, Garay J, Farfán N, Saavedra I, Cáceres D, Ibarra C, Varela N. Frequencies of 23 functionally significant variant alleles related with metabolism of antineoplastic drugs in the chilean population: comparison with caucasian and asian populations. Front Genet 2012; 3:229. [PMID: 23130019 PMCID: PMC3487109 DOI: 10.3389/fgene.2012.00229] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 10/10/2012] [Indexed: 01/02/2023] Open
Abstract
Cancer is a leading cause of death worldwide. The cancer incidence rate in Chile is 133.7/100,000 inhabitants and it is the second cause of death, after cardiovascular diseases. Most of the antineoplastic drugs are metabolized to be detoxified, and some of them to be activated. Genetic polymorphisms of drug-metabolizing enzymes can induce deep changes in enzyme activity, leading to individual variability in drug efficacy and/or toxicity. The present research describes the presence of genetic polymorphisms in the Chilean population, which might be useful in public health programs for personalized treatment of cancer, and compares these frequencies with those reported for Asian and Caucasian populations, as a contribution to the evaluation of ethnic differences in the response to chemotherapy. We analyzed 23 polymorphisms in a group of 253 unrelated Chilean volunteers from the general population. The results showed that CYP2A6*2, CYP2A6*3, CYP2D6*3, CYP2C19*3, and CYP3A4*17 variant alleles are virtually absent in Chileans. CYP1A1*2A allele frequency (0.37) is similar to that of Caucasians and higher than that reported for Japanese people. Allele frequencies for CYP3A5*3(0.76) and CYP2C9*3(0.04) are similar to those observed in Japanese people. CYP1A1*2C(0.32), CYP1A2*1F(0.77), CYP3A4*1B(0.06), CYP2D6*2(0.41), and MTHFR T(0.52) allele frequencies are higher than the observed either in Caucasian or in Japanese populations. Conversely, CYP2C19*2 allelic frequency (0.12), and genotype frequencies for GSTT1 null (0.11) and GSTM1 null (0.36) are lower than those observed in both populations. Finally, allele frequencies for CYP2A6*4(0.04), CYP2C8*3(0.06), CYP2C9*2(0.06), CYP2D6*4(0.12), CYP2E1*5B(0.14), CYP2E1*6(0.19), and UGT2B7*2(0.40) are intermediate in relation to those described in Caucasian and in Japanese populations, as expected according to the ethnic origin of the Chilean population. In conclusion, our findings support the idea that ethnic variability must be considered in the pharmacogenomic assessment of cancer pharmacotherapy, especially in mixed populations and for drugs with a narrow safety range.
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Affiliation(s)
- Angela Roco
- Center of Pharmacological and Toxicological Research (IFT), Molecular and Clinical Pharmacology Program, Instituto de Ciencias Biomédicas, Faculty of Medicine, University of Chile Santiago, Chile ; School of Pharmacy, Faculty of Medicine, Andrés Bello University Santiago, Chile ; San Juan de Dios Hospital Santiago, Chile
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Da Silva FR, Da Silva J, Allgayer MDC, Simon CF, Dias JF, dos Santos CEI, Salvador M, Branco C, Schneider NB, Kahl V, Rohr P, Kvitko K. Genotoxic biomonitoring of tobacco farmers: Biomarkers of exposure, of early biological effects and of susceptibility. JOURNAL OF HAZARDOUS MATERIALS 2012; 225-226:81-90. [PMID: 22614024 DOI: 10.1016/j.jhazmat.2012.04.074] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 04/23/2012] [Accepted: 04/27/2012] [Indexed: 06/01/2023]
Abstract
Tobacco farming presents several hazards to those who cultivate and harvest the plant. The genotoxic and mutagenic effects in tobacco farmers were investigated. In order to verify the relationship between genetic susceptibility and biomarkers GSTT1, GSTM1, GSTP1, CYP2A6, PON, OGG1, RAD51, XRCC1, and XRCC4 genes polymorphism were evaluated. Oxidative stress markers and trace elements content were determined. Peripheral blood cells samples were collected from 111 agricultural workers during pesticides application and leaf harvest, and 56 non-exposed subjects. Results show that farmers are exposed to mixture of substances with genotoxic and cytotoxic potential. Only GSTM1 null and CYP2A6*9 showed significant associations with cytokinesis-blocked micronuclei assay results. In pesticide application an increase in trace elements content was observed. The results indicated that exposure to pesticides and nicotine can influence antioxidant enzymes activity. Our study drives the attention once more to the need for occupational training on safe work environment for farm workers.
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Affiliation(s)
- Fernanda Rabaioli Da Silva
- Postgraduate Program in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
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Sison-Young RLC, Kia R, Heslop J, Kelly L, Rowe C, Cross MJ, Kitteringham NR, Hanley N, Park BK, Goldring CEP. Human pluripotent stem cells for modeling toxicity. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2012; 63:207-256. [PMID: 22776643 DOI: 10.1016/b978-0-12-398339-8.00006-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The development of xenobiotics, driven by the demand for therapeutic, domestic and industrial uses continues to grow. However, along with this increasing demand is the risk of xenobiotic-induced toxicity. Currently, safety screening of xenobiotics uses a plethora of animal and in vitro model systems which have over the decades proven useful during compound development and for application in mechanistic studies of xenobiotic-induced toxicity. However, these assessments have proven to be animal-intensive and costly. More importantly, the prevalence of xenobiotic-induced toxicity is still significantly high, causing patient morbidity and mortality, and a costly impediment during drug development. This suggests that the current models for drug safety screening are not reliable in toxicity prediction, and the results not easily translatable to the clinic due to insensitive assays that do not recapitulate fully the complex phenotype of a functional cell type in vivo. Recent advances in the field of stem cell research have potentially allowed for a readily available source of metabolically competent cells for toxicity studies, derived using human pluripotent stem cells harnessed from embryos or reprogrammed from mature somatic cells. Pluripotent stem cell-derived cell types also allow for potential disease modeling in vitro for the purposes of drug toxicology and safety pharmacology, making this model possibly more predictive of drug toxicity compared with existing models. This article will review the advances and challenges of using human pluripotent stem cells for modeling metabolism and toxicity, and offer some perspectives as to where its future may lie.
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Affiliation(s)
- R L C Sison-Young
- MRC Centre for Drug Safety Science, Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
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Singh S, Kumar V, Singh P, Banerjee BD, Rautela RS, Grover SS, Rawat DS, Pasha ST, Jain SK, Rai A. Influence of CYP2C9, GSTM1, GSTT1 and NAT2 genetic polymorphisms on DNA damage in workers occupationally exposed to organophosphate pesticides. Mutat Res 2011; 741:101-8. [PMID: 22108250 DOI: 10.1016/j.mrgentox.2011.11.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 10/09/2011] [Accepted: 11/07/2011] [Indexed: 10/15/2022]
Abstract
Previous studies have revealed that organophosphate pesticides (OPs) are primarily metabolized by xenobiotic metabolizing enzymes (XMEs). Very few studies have explored genetic polymorphisms of XMEs and their association with DNA damage in pesticides-exposed workers. Present study was designed to determine the influence of CYP2C9, GSTM1, GSTT1 and NAT2 genetic polymorphisms on DNA damage in workers occupationally exposed to OPs. We examined 268 subjects including 134 workers occupationally exposed to OPs and an equal number of normal healthy controls. The DNA damage was evaluated using alkaline comet assay and genotyping was done using individual polymerase chain reaction (PCR) or polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Acetylcholinesterase and paraoxonase activity were found to be significantly lowered in workers as compared to control subjects which were analyzed as biomarkers of toxicity due to OPs exposure (p<0.001). Workers showed significantly higher DNA tail moment (TM) compared to control subjects (14.32±2.17 vs. 6.24±1.37 tail % DNA, p<0.001). GSTM1 null genotype was found to influence DNA TM in workers (p<0.05). DNA TM was also found to be increased with concomitant presence of NAT2 slow acetylation and CYP2C9*3/*3 or GSTM1 null genotypes (p<0.05). DNA TM was found increased in NAT2 slow acetylators with mild and heavy smoking habits in control subjects and workers, respectively (p<0.05). The results of this study suggest that GSTM1 null genotypes, and an association of NAT2 slow acetylation genotypes with CYP2C9*3/*3 or GSTM1 null genotypes may modulate DNA damage in workers occupationally exposed to OPs.
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Affiliation(s)
- Satyender Singh
- Division of Biochemistry & Biotechnology, National Centre for Disease Control, 22, Sham Nath Marg, Delhi 110054, India.
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