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Updated: May 19, 2026
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Bacterial Gene Expression Analysis Using Microarrays
Published on: May 28, 2007
Comprehensive gene expression analysis of type B trichothecenes
Tadahiro Suzuki1, Yumiko Iwahashi
1Applied Microbiology Division, National Food Research Institute, Tsukuba, Ibaraki, Japan.
Journal of Agricultural and Food Chemistry
|August 18, 2012
Summary
Deoxynivalenol (DON) and nivalenol (NIV) derivatives are food pollutants. 15-acetyldeoxynivalenol (15-AcDON) showed higher toxicity and significant gene expression changes in yeast, indicating potential risks similar to mammalian cells.
Area of Science:
- Mycology
- Toxicology
- Food Science
Background:
- Type B trichothecenes, deoxynivalenol (DON) and nivalenol (NIV), are fungal metabolites and significant food/feed contaminants.
- Emerging derivatives like 3-acetyldeoxynivalenol (3-AcDON), 15-acetyldeoxynivalenol (15-AcDON), and 4-acetylnivalenol (4-AcNIV) show changing global production trends.
Purpose of the Study:
- To evaluate the toxicity of DON and NIV derivatives using a yeast model.
- To investigate the specific toxicological impact and gene expression changes induced by these mycotoxins.
Main Methods:
- Utilized a yeast PDR5 mutant for comparative toxicity assessment.
- Conducted growth tests to determine relative toxicity levels.
- Analyzed gene expression patterns and cellular localization.
Main Results:
- DON, 15-AcDON, and 4-AcNIV exhibited higher toxicity than 3-AcDON and NIV.
- 15-AcDON induced the most substantial gene expression alterations.
- Observed repression of mitochondrial ribosomal genes, particularly with 15-AcDON exposure.
Conclusions:
- Yeast toxicity trends for DON and NIV derivatives mirror those in mammalian systems.
- 15-AcDON presents a notable toxicological concern due to its significant impact on gene expression and cellular processes.
