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Content Provider | World Health Organization (WHO)-Global Index Medicus |
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Author | Singh, Satyender Kumar, Vivek Singh, Priyanka Banerjee, Basu Dev Rautela, Rajender Singh Grover, Shyam Sunder Rawat, Devendra Singh Pasha, Syed Tazeen Jain, Sudhir Kumar Rai, Arvind |
Description | Country affiliation: India Author Affiliation: Singh S ( Division of Biochemistry & Biotechnology, National Centre for Disease Control, 22, Sham Nath Marg, Delhi 110054, India. satyenders@gmail.com) |
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. |
File Format | HTM / HTML |
ISSN | 13835718 |
e-ISSN | 18793592 |
Journal | Mutation Research/Genetic Toxicology and Environmental Mutagenesis |
Issue Number | 1-2 |
Volume Number | 741 |
Language | English |
Publisher | Elsevier |
Publisher Date | 2012-01-24 |
Publisher Place | Netherlands |
Access Restriction | Open |
Subject Keyword | Research Support, Non-u.s. Gov't Discipline Genetics Toxicity Occupational Exposure Pesticides Discipline Biochemistry Organophosphorus Compounds Arylamine N-acetyltransferase Comet Assay Dna Damage Polymorphism, Genetic Cytochrome P-450 Cyp2c9 Genetics Glutathione Transferase Aryl Hydrocarbon Hydroxylases |
Content Type | Text |
Resource Type | Article |
Subject | Health, Toxicology and Mutagenesis Genetics |
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