In vitro genomic damage caused by glyphosate and its metabolite AMPA

Area of Science:

• Environmental Toxicology
• Genetics
• Cell Biology

Background:

• Glyphosate is a widely used herbicide with extensive research on its effects.
• The genotoxic potential of glyphosate and its metabolite, aminomethylphosphonic acid (AMPA), particularly their combined action, remains understudied.
• Previous studies have often used concentrations higher than those typically encountered environmentally.

Purpose of the Study:

• To assess the genotoxicity of glyphosate and AMPA in cultured human lymphocytes.
• To investigate the combined genotoxic effects of glyphosate and AMPA at realistic concentrations.
• To evaluate the impact of these compounds on cell apoptosis and necrosis.

Main Methods:

• Human lymphocytes were cultured and treated with varying concentrations of glyphosate and AMPA (0.0125–0.500 μg/mL).
• A micronuclei assay was employed to detect genomic damage.
• Apoptosis and necrosis rates were analyzed following compound exposure.

Main Results:

• Both glyphosate and AMPA induced a significant increase in micronuclei frequency starting from 0.050 μg/mL.
• Genomic damage was observed when cells were exposed to combined concentrations of glyphosate and AMPA.
• No synergistic genotoxic action was detected between glyphosate and AMPA.
• Increased apoptosis was noted at the highest concentrations, while necrosis rose at 0.250 μg/mL for both compounds alone and in combination.

Conclusions:

• Glyphosate and its metabolite AMPA are capable of causing genomic damage in human lymphocytes.
• The genotoxic effects occur both individually and when present in equal concentrations.
• These findings highlight potential risks associated with environmental exposure to glyphosate and AMPA.