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Published on: February 7, 2018
Hydrogen peroxide-induced gene expression across kingdoms: a comparative analysis
Korneel Vandenbroucke1, Steven Robbens, Klaas Vandepoele
1Department of Plant Systems Biology, Flanders Institute for Biotechnology, Ghent, Belgium.
Molecular Biology and Evolution
|January 12, 2008
Summary
Cells utilize gene expression for defense against oxidative stress. A meta-analysis reveals conserved hydrogen peroxide (H2O2) responses across diverse organisms, with differential regulation of antioxidant capacity in microorganisms and higher eukaryotes.
Area of Science:
- Cellular Biology
- Genomics
- Biochemistry
Background:
- Cells activate defense mechanisms against oxidative stress via gene expression.
- Microarray technology enables genome-wide monitoring of gene expression changes.
- Hydrogen peroxide (H2O2) is a key inducer of oxidative stress.
Purpose of the Study:
- To conduct a meta-analysis of H2O2-induced gene expression across different species.
- To compare oxidative stress responses in microorganisms and higher eukaryotes.
- To identify conserved H2O2-responsive protein families.
Main Methods:
- Meta-analysis of published microarray data.
- Comparative analysis of gene expression patterns.
- Identification of conserved protein families responsive to H2O2.
Main Results:
- H2O2-induced gene expression in yeast (Saccharomyces cerevisiae, Schizosaccharomyces pombe) is conserved and similar to Arabidopsis thaliana, but distinct from human HeLa cells.
- Antioxidant capacity regulation differs between microorganisms and higher eukaryotes.
- Four conserved eukaryotic protein families (DNAJ proteins, small GTP-binding proteins, Ca2+-dependent protein kinases, ubiquitin-conjugating enzymes) are responsive to H2O2 across kingdoms.
Conclusions:
- Oxidative stress response pathways show evolutionary conservation but also differential regulation.
- Conserved protein families play a role in H2O2 response across diverse life forms.
- Understanding these conserved mechanisms can inform strategies for managing oxidative stress.
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