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Updated: Jul 8, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

Pollution-affected fish hepatic transcriptome and its expression patterns on exposure to cadmium.

M Auslander¹, Y Yudkovski, V Chalifa-Caspi

¹Israel Oceanographic and Limnological Research, Haifa 31080, Israel.

Marine Biotechnology (New York, N.Y.)

|January 24, 2008

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This study developed a fish gene expression microarray to detect environmental toxins. The tool successfully identified cadmium-induced gene changes, highlighting its potential for biomonitoring pollution impacts.

Area of Science:

Environmental toxicology
Molecular biology
Fish ecotoxicology

Background:

Environmental pollution poses a significant threat to aquatic ecosystems.
Assessing the impact of multiple pollutants on fish health requires sensitive and efficient methods.
Gene expression profiling offers a powerful approach to understand toxicological responses in organisms.

Purpose of the Study:

To develop and validate a multigene cDNA microarray for biomonitoring environmental pollutants in fish.
To investigate the hepatic gene expression changes in *Lithognathus mormyrus* upon exposure to cadmium.
To demonstrate the utility of the developed microarray as a tool for routine environmental threat assessment.

Main Methods:

Construction of a *Lithognathus mormyrus* hepatic cDNA microarray using 4608 clones.

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Last Updated: Jul 8, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

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Published on: December 17, 2018

Quantifying Fish Swimming Behavior in Response to Acute Exposure of Aqueous Copper Using Computer Assisted Video and Digital Image Analysis

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Published on: February 26, 2016

Sequencing and annotation of cDNA clones to create a unique gene set.

Exposure of fish to cadmium via feeding and injection, followed by microarray analysis of hepatic gene expression.

Identification and analysis of differentially expressed genes.

Main Results:

A microarray with 1494 unique annotated clones was successfully constructed.
Cadmium exposure led to altered expression of 31 unique clones, with 23 genes downregulated.
Key differentially expressed genes included metallothionein, cytochrome P450 2K5, and complement C31.
The results suggest general toxicity due to intensive cadmium exposure.

Conclusions:

A functional multigene cDNA microarray can be effectively used for routine biomonitoring of environmental threats.
The developed tool demonstrates the capacity to identify specific toxicological responses in fish.
This approach provides a foundation for developing biomarker indices for environmental risk assessment.