In vitro studies on organophosphate pesticides induced oxidative DNA damage in rat lymphocytes

Area of Science:

• Environmental toxicology
• Molecular toxicology
• Pesticide safety

Background:

• Organophosphate (OP) pesticides are extensively utilized in agriculture and households for pest management.
• Concerns exist regarding the potential health risks associated with OP pesticide exposure.

Purpose of the Study:

• To investigate the genotoxicity of chlorpyrifos (CPF), methyl parathion (MPT), and malathion (MLT) in Wistar rat peripheral blood lymphocytes.
• To assess whether DNA damage induced by these pesticides is linked to oxidative stress.

Main Methods:

• In vitro study using Wistar rat peripheral blood lymphocytes.
• Single cell gel electrophoresis (SCGE; comet assay) to measure DNA single- and double-strand breaks.
• Utilized DNA repair enzymes formamidoaminopyrimidine glycosylase (Fpg) and endonuclease III (Endo III) to detect base damages.

Main Results:

• Significant increases in DNA strand breaks and reactive oxygen species (ROS), including superoxide anion and hydrogen peroxide, were observed.
• Methyl parathion (MPT) induced the highest levels of DNA damage and ROS production, followed by chlorpyrifos (CPF) and malathion (MLT).

Conclusions:

• Organophosphate pesticides (CPF, MPT, MLT) exhibit genotoxic potential.
• These pesticides can induce DNA damage and oxidative stress in lymphocytes.
• Findings highlight the importance of evaluating the safety of commonly used OP pesticides.