Abstract
The genetic susceptibility of individuals to the genotoxic effect of pesticides may be modulated by variations in genes involved in nucleotide excision repair (NER) pathway and therefore plays an important role in the evaluation of occupational risk. We aimed to evaluate the role of xeroderma pigmentosum complementation group C (XPC) Lys939Gln (A2920C, rs2228001), XPC Ala499Val (C2151T, rs2228000), xeroderma pigmentosum complementation group D (XPD) Asp312Asn (G23591A, rs1799793) and XPD Lys751Gln (A35931C, rs13181) in the modulation of DNA damage. A total of 450 subjects (225 pesticide-exposed agricultural workers and 225 age- and sex-matched controls) from Punjab, North-West India were recruited to study DNA damage by alkaline comet assay. Genotyping was carried out by PCR–RFLP using site-specific restriction enzymes. We found significant elevation in DNA damage parameters in pesticide-exposed agricultural workers as compared to the controls (p < 0.01). Association of comet tail length with XPC 939Gln/Gln (CC), XPD 312Asp/Asn (GA) and XPD 312Asn/Asn (AA) genotypes was observed. Frequency of cells showing DNA migration was significantly higher in exposed workers with variant XPC 939Gln/Gln (CC), XPD 312Asp/Asn (GA) and XPD 312Asn/Asn (AA) genotypes. Mean tail length was significantly increased in agricultural workers carrying XPD 312Asn/Asn (AA) genotype. Elevation in total comet DNA migration was also observed in exposed workers carrying variant XPC 939Lys/Gln (AC), XPC 939Gln/Gln (CC), XPC 499Val/Val (TT) and XPD 312Asn/Asn (AA) genotypes. Our results strongly indicate significant positive association of variant XPC and XPD genotypes with higher pesticide-induced DNA damage in North-West Indian agricultural workers.
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Funding
This study was funded by Department of Science and Technology- Science and Engineering Research Board (DST-SERB), New Delhi, India (Grant No. YSS/2015/000870).
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The approval was obtained from Institutional Ethical Committee (IEC) of Sri Guru Granth World University, Fatehgarh Sahib, Punjab (SGGSWU/IEC/2015/02).
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Kaur, K., Kaur, R. Polymorphisms in XPC and XPD genes modulate DNA damage in pesticide-exposed agricultural workers of Punjab, North-West India. Mol Biol Rep 47, 5253–5262 (2020). https://doi.org/10.1007/s11033-020-05600-6
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DOI: https://doi.org/10.1007/s11033-020-05600-6