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Gene expression profiling in ecotoxicology.

Terry W Snell1, Sara E Brogdon, Michael B Morgan

  • 1School of Biology, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA. terry.snell@biology.gatech.edu

Ecotoxicology (London, England)
|December 19, 2003
PubMed
Summary
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Gene expression profiling offers a powerful genomics tool for ecotoxicology, enabling the identification of toxicant-specific responses and environmental stressor impacts in populations. Techniques are available for non-model organisms to screen for stress-induced genes.

Area of Science:

  • Ecotoxicology
  • Genomics
  • Molecular Biology

Background:

  • Gene expression profiling is emerging as a key endpoint in ecotoxicology.
  • Genomics offers novel approaches to understand organismal responses to environmental stressors.
  • Identifying toxicant-specific responses requires analyzing complex gene expression patterns.

Purpose of the Study:

  • To review the utility of gene expression profiling in ecotoxicology.
  • To describe methods for applying gene expression profiling to non-model organisms.
  • To enable the diagnosis of environmental stressors impacting wild populations.

Main Methods:

  • Utilizing differential display PCR (DD PCR), suppressive subtractive hybridization PCR (SSH PCR), and representational difference analysis for gene screening in non-model organisms.

Related Experiment Videos

  • Leveraging known stress-induced genes from model organisms (e.g., yeast) and using consensus PCR primers for amplification in ecotoxicological species.
  • Developing cDNA arrays for high-throughput screening of stress-induced genes.

    • Main Results:

    • Gene expression profiling can identify toxicant-specific and stressor-specific signatures.
    • Established techniques allow for the screening of stress-induced genes in organisms lacking sequenced genomes.
    • Well-characterized stress-related genes (e.g., hsp78, metallothionein, superoxide dismutase) can be amplified and analyzed.

    Conclusions:

    • Gene expression profiling is a valuable tool for ecotoxicological assessments.
    • Methods exist to adapt this genomics approach for non-model organisms relevant to ecotoxicology.
    • Stressor-specific gene expression signatures can aid in diagnosing environmental health issues in field populations.