Quantitative trait transcripts for nicotine resistance in Drosophila melanogaster
- PMID: 17237783
- DOI: 10.1038/ng1944
Quantitative trait transcripts for nicotine resistance in Drosophila melanogaster
Abstract
Although most genetic association studies are performed with the intention of detecting nucleotide polymorphisms that are correlated with a complex trait, transcript abundance should also be expected to associate with diseases or phenotypes. We performed a scan for such quantitative trait transcripts in adult female heads of the fruit fly (Drosophila melanogaster) that might explain variation for nicotine resistance. The strongest association was seen for abundance of ornithine aminotransferase transcripts, implicating detoxification and neurotransmitter biosynthesis as mediators of the quantitative response to the drug. Subsequently, genetic analysis and metabolite profiling confirmed a complex role for ornithine and GABA levels in modification of survival time upon chronic nicotine exposure. Differences between populations from North Carolina and California suggest that the resistance mechanism may be an evolved response to environmental exposure.
Comment in
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Personalized medicine and quantitative trait transcripts.Nat Genet. 2007 Feb;39(2):144-5. doi: 10.1038/ng0207-144. Nat Genet. 2007. PMID: 17262025 No abstract available.
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