Assessment of DNA damage in Polish children environmentally exposed to pesticides

Abstract

Exposure to pesticides leads to complex, long-lasting adverse effects on human health, and poses a substantial risk to those living in areas devoted to agriculture. Children are particularly vulnerable to the pesticide exposure, due to the developmental, dietary and physiological factors. Small body mass and typical exploratory behavior result in increased risk of intoxication. Thus, even exposure to low concentrations of pesticides, if of sufficient duration, may lead to permanent health disorders and limit their harmonious development.In this study 108 children, living in areas of an intense pesticide use and a control group (n = 92) of children from an agrotouristic area were investigated, whether DNA damage increased due to prolonged pesticide exposure. A presence of DNA breaks and oxidative damage to DNA bases, characterized as Fpg-sensitive sites, were detected by comet assay. Micronuclei (MN) formation was evaluated by cytokinesis-block MN assay. The exposure of children to pesticides resulted in increased number of MN in peripheral blood lymphocytes (P = 0.016), increased DNA strand breaks level (P = 0.002) and oxidative damage to DNA (P < 0.001). Negative correlation was demonstrated between the level of DNA strand breaks and acetylcholinesterase (AChE) activity in exposed group. In conclusion, despite just environmental pesticide exposure in the test group of children, significant biological effects were detected.