genome-wide functional and stress response profiling reveals toxic mechanism and genes required for tolerance to benzo[a]pyrene in s. cerevisiae
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ID: 242308
2013
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Abstract
Benzo[a]pyrene (BaP) is a ubiquitous, potent, and complete carcinogen resulting from incomplete organic combustion. BaP can form DNA adducts but other mechanisms may play a role in toxicity. We used a functional toxicology approach in S. cerevisiae to assess the genetic requirements for cellular resistance to BaP. In addition, we examined translational activities of key genes involved in various stress response pathways. We identified multiple genes and processes involved in modulating BaP toxicity in yeast which support DNA damage as a primary mechanism of toxicity, but also identify other potential toxicity pathways. Gene ontology enrichment analysis indicated that DNA damage and repair as well as redox homeostasis and oxidative stress are key processes in cellular response to BaP suggesting a similar mode of action of BaP in yeast and mammals. Interestingly, toxicant export is also implicated as a potential novel modulator of cellular susceptibility. In particular, we identified several transporters with human orthologs (solute carrier family 22) which may play a role in mammalian systems.
| Reference Key |
o'connor2013frontiersgenome-wide
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|---|---|
| Authors | ;Sean Timothy Francis O'Connor;Sean Timothy Francis O'Connor;Jiaqi eLan;Matthew eNorth;Alexandre eLoguinov;Luoping eZhang;Martyn T Smith;April eGu;Chris eVulpe |
| Journal | chemical record (new york, ny) |
| Year | 2013 |
| DOI |
10.3389/fgene.2012.00316
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| URL | |
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