High-Throughput Transcriptomics of Water Extracts Detects Reductions in Biological Activity with Water Treatment...

Area of Science:

• Environmental Science
• Toxicology
• Molecular Biology

Background:

• Water supplies contain chemical contaminants from various sources, posing risks to health.
• Current chemical analyses have limitations in coverage and cost.
• Broad-coverage in vitro assays like transcriptomics can assess a wider range of potential effects.

Purpose of the Study:

• To assess the biological activity of field-derived water extracts using high-throughput transcriptomics.
• To evaluate the effectiveness of advanced water treatment on reducing bioactivity.

Main Methods:

• High-throughput transcriptomics was employed.
• MCF7 breast carcinoma cells were exposed to water extracts.
• Gene expression changes in cell proliferation, neurological, estrogenic, and antibiotic pathways were analyzed.

Main Results:

• Wastewater and surface water extracts induced significant changes in gene expression.
• Drinking and reclaimed water extracts, after advanced treatment, showed reduced bioactivity.
• Reclaimed water extracts induced fewer gene expression changes than laboratory blanks.

Conclusions:

• Transcriptomics is a valuable tool for water quality monitoring.
• Advanced water treatment significantly reduces the bioactivity of reclaimed water.
• Bioassay-based monitoring provides reliable data for water quality assessment.