# Sensitive Detection of Genotoxic Substances in Complex Food Matrices by Multiparametric High-Content Analysis

## TL;DR

A new method detects harmful DNA-damaging substances in foods like coffee and spinach with high accuracy.

## Contribution

A multiparametric high-content analysis method for genotoxicity screening in complex food matrices is introduced.

## Key findings

- The assay measures γ-H2AX, p-H3, and RAD51 biomarkers to enhance genotoxicity detection sensitivity.
- Five food matrices did not interfere with biomarker detection when properly diluted.
- The method distinguishes genotoxic compounds by their mode of action and cellular response.

## Abstract

Genotoxic substances widely exist in the environment and the food supply, posing serious health risks due to their potential to induce DNA damage and cancer. Traditional genotoxicity assays, while valuable, are limited by insufficient sensitivity, specificity, and efficiency, particularly when applied to complex food matrices. This study introduces a multiparametric high-content analysis (HCA) for the detection of genotoxic substances in complex food matrices. The developed assay measures three genotoxic biomarkers, including γ-H2AX, p-H3, and RAD51, which enhances the sensitivity and accuracy of genotoxicity screening. Moreover, the assay effectively distinguishes genotoxic compounds with different modes of action, which not only offers a more comprehensive assessment of DNA damage and the cellular response to genotoxic stress but also provides new insights into the exploration of genotoxicity mechanisms. Notably, the five tested food matrices, including coffee, tea, pak choi, spinach, and tomato, were found not to interfere with the detection of these biomarkers under proper dilution ratios, validating the robustness and reliability of the assay for the screening of genotoxic compounds in the food industry. The integration of multiple biomarkers with HCA provides an efficient method for detecting and assessing genotoxic substances in the food supply, with potential applications in toxicology research and food safety.