Paper-based electrochemiluminescent screening for genotoxic activity in the environment

Area of Science:

• Environmental Science
• Analytical Chemistry
• Biotechnology

Background:

• Conventional methods for pollutant detection are often time-consuming and require specialized laboratory equipment.
• There is a need for rapid, cost-effective screening tools for genotoxic pollutants in environmental samples.
• Genotoxic pollutants can cause DNA damage, posing risks to human health and ecosystems.

Purpose of the Study:

• To develop and validate a low-cost microfluidic paper electrochemical device (μPED) for detecting genotoxic activity.
• To establish a method for measuring genotoxic equivalents in environmental samples using a reference standard.
• To demonstrate the device's capability for on-site environmental monitoring.

Main Methods:

• Fabrication of the μPED using screen printing and wax transfer onto filter paper.
• Incorporation of a ruthenium metallopolymer, metabolic enzymes, and DNA within the device.
• Detection of DNA damage via electrochemiluminescence using a charge-coupled device (CCD) camera.

Main Results:

• Proof-of-concept established for detecting genotoxic activity in smoke, water, and food samples.
• The μPED successfully measured genotoxic equivalents, with signals related to benzo[a]pyrene (B[a]P).
• The device demonstrated rapid screening capabilities for environmental monitoring.

Conclusions:

• The μPED is a viable, low-cost tool for rapid, on-site screening of genotoxic pollutants.
• The device effectively measures the genotoxic reactivity of metabolites in environmental samples.
• This technology offers a new approach for environmental monitoring and risk assessment.