Genetic variation and risk of DNA damage in peripheral blood lymphocytes of Iranian formaldehyde-exposed workers

2017 ◽  
Vol 37 (7) ◽  
pp. 690-696
Author(s):  
Rezvan Zendehdel ◽  
Parviz Abdolmaleki ◽  
Fatemeh Javani Jouni ◽  
Mohammad Mazinani
Keyword(s):  
Dna Damage ◽  
Peripheral Blood ◽  
Human Peripheral Blood ◽  
Peripheral Blood Lymphocytes ◽  
Control Population ◽  
Control Group ◽  
Special Role ◽  
Effective Parameters ◽  
Blood Lymphocytes ◽  
Exposed Population

Formaldehyde (FA) has given positive results for the genetic damage evaluated in human peripheral blood lymphocytes. Polymorphism plays a special role in the toxicity of chemicals. DNA damage in blood cells was evaluated in workers who were occupationally exposed to FA. This study tested the association of alcohol dehydrogenase III (ADH3) and manganese-superoxide dismutase (Mn-SOD) gene polymorphism, with DNA damage of peripheral blood lymphocytes. Gene polymorphisms were evaluated in 54 workers from melamine dinnerware workshops and 34 workers from dairy production workshops. The control and exposed population were matched based on age, smoking, work history and socioeconomic status. DNA damage was evaluated by alkaline comet assay in the peripheral blood lymphocytes. ADH3 and Mn-SOD genotypes were determined in all workers using polymerase chain reaction–restriction fragment length polymorphism method. DNA damage of lymphocyte cells was significantly higher ( p < 0.001) in the exposed individuals in comparison with the control population. The examinations of the exposed group had revealed significantly higher ( p < 0.01) variant of Val/Val of Mn-SOD compared to control group. In workers with ADH32–2 variant, significantly higher levels of DNA damage ( p < 0.01) were observed than the control population with the same genotype. It could be concluded that enzymes involved in the metabolism of FA and oxidative stress controlling are two important effective parameters for DNA damage of peripheral blood lymphocytes in exposed people. These results are regarded as a pioneer investigation for the management of health risks assessment.

scholarly journals Evaluation of Genotoxic and Cytotoxic Effects in Human Peripheral Blood Lymphocytes ExposedIn Vitroto Neonicotinoid Insecticides News

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
María Elena Calderón-Segura ◽  
Sandra Gómez-Arroyo ◽  
Rafael Villalobos-Pietrini ◽  
Carmen Martínez-Valenzuela ◽  
Yolanda Carbajal-López ◽  
...  
Keyword(s):  
Dna Damage ◽  
Peripheral Blood ◽  
Human Peripheral Blood ◽  
Peripheral Blood Lymphocytes ◽  
Blue Dye ◽  
Cytotoxic Effects ◽  
Blood Lymphocytes ◽  
Neonicotinoid Insecticides ◽  
Human Peripheral Blood Lymphocytes

Calypso (thiacloprid), Poncho (clothianidin), Gaucho (imidacloprid), and Jade (imidacloprid) are commercial neonicotinoid insecticides, a new class of agrochemicals in México. However, genotoxic and cytotoxic studies have not been performed. In the present study, human peripheral blood lymphocytes (PBL) were exposedin vitroto different concentrations of the four insecticides. The genotoxic and cytotoxic effects were evaluated using the alkaline comet and trypan blue dye exclusion assays. DNA damage was evaluated using two genotoxicity parameters: tail length and comet frequency. Exposure to9.5×10-6to5.7×10-5 M Jade;2.8×10-4to1.7×10-3 M Gaucho;0.6×10-1to1.4×10-1 M Calypso;1.2×10-1to9.5×10-1 M Poncho for 2 h induced a significant increase DNA damage with a concentration-dependent relationship. Jade was the most genotoxic of the four insecticides studied. Cytotoxicity was observed in cells exposed to18×10-3 M Jade,2.0×10-3 M Gaucho,2.0×10-1 M Calypso, 1.07 M Poncho, and cell death occurred at30×10-3 M Jade,3.3×10-3 M Gaucho,2.8×10-1 M Calypso, and 1.42 M Poncho. This study provides the first report of genotoxic and cytotoxic effects in PBL followingin vitroexposure to commercial neonicotinoid insecticides.

scholarly journals Genotoxic effects of diazinon on human peripheral blood lymphocytes / Genotoksično djelovanje diazinona na limfocite ljudske periferne krvi

2015 ◽  
Vol 66 (2) ◽  
pp. 153-158 ◽  
Author(s):  
Fulya Dilek Gökalp Muranli ◽  
Martin Kanev ◽  
Kezban Ozdemir
Keyword(s):  
Dna Damage ◽  
Comet Assay ◽  
Peripheral Blood ◽  
Human Peripheral Blood ◽  
Human Lymphocytes ◽  
Peripheral Blood Lymphocytes ◽  
Blood Lymphocytes ◽  
Human Peripheral Blood Lymphocytes ◽  
Current Assessment ◽  
High Level

Abstract The aim of this study was to evaluate the genetic damage in human peripheral blood lymphocytes following 24 and 48- hour exposure to a commercial diazinon formulation Basudin 60EM® at concentrations between 0.01 and 40 μg mL-1. For this purpose we used the micronucleus (MN), fluorescence in situ hybridization (FISH), and alkaline single cell gel electrophoresis (comet) assay. Diazinon significantly increased the frequency of micronucleated cells compared to control. Forty-eight-hour exposure increased this frequency even at lower concentrations (0.01-10 μg mL-1). The FISH results revealed aneugenic effects at 10 μg mL-1. The comet assay also confirmed DNA damage at concentrations between 10 and 40 μg mL-1. Our findings have confirmed the genotoxic potential of diazinon and its cytotoxic effect on human lymphocytes. The increased DNA damage in our study raises concern about the current assessment of the health risk posed by this pesticide and calls for a high level of caution in agricultural and household use.

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