title: Genome-wide gene expression analysis in response to organophosphorus pesticide chlorpyrifos and diazinon in C. elegans.
abstract: Organophosphorus pesticides (OPs) were originally designed to affect the nervous system by inhibiting the enzyme acetylcholinesterase, an important regulator of the neurotransmitter acetylcholine. Over the past years evidence is mounting that these compounds affect many other processes. Little is known, however, about gene expression responses against OPs in the nematode Caenorhabditis elegans. This is surprising because C. elegans is extensively used as a model species in toxicity studies. To address this question we performed a microarray study in C. elegans which was exposed for 72 hrs to two widely used Ops, chlorpyrifos and diazinon, and a low dose mixture of these two compounds. Our analysis revealed transcriptional responses related to detoxification, stress, innate immunity, and transport and metabolism of lipids in all treatments. We found that for both compounds as well as in the mixture, these processes were regulated by different gene transcripts. Our results illustrate intense, and unexpected crosstalk between gene pathways in response to chlorpyrifos and diazinon in C. elegans.
authors.affiliation: Laboratory of Nematology, Wageningen University, Wageningen, The Netherlands.
authors.forename: Ana
authors.initials: A
authors.lastname: Viñuela
authors.forename: L Basten
authors.initials: LB
authors.lastname: Snoek
authors.forename: Joost A G
authors.initials: JA
authors.lastname: Riksen
authors.forename: Jan E
authors.initials: JE
authors.lastname: Kammenga
mesh_terms: D000818:Animals; D017173:Caenorhabditis elegans / Q000166:cytology / Q000187:drug effects* / Q000235:genetics* / Q000276:immunology; D029742:Caenorhabditis elegans Proteins / Q000378:metabolism; D004390:Chlorpyrifos / Q000493:pharmacokinetics / Q000633:toxicity*; D003976:Diazinon / Q000493:pharmacokinetics / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D051858:Forkhead Transcription Factors; D020869:Gene Expression Profiling; D023281:Genomics; D007113:Immunity, Innate / Q000187:drug effects / Q000235:genetics; D008658:Inactivation, Metabolic / Q000235:genetics; D010575:Pesticides / Q000633:toxicity*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects / Q000235:genetics; D018675:Toxicity Tests; D014157:Transcription Factors / Q000378:metabolism
chemical_list: D029742:Caenorhabditis elegans Proteins; D051858:Forkhead Transcription Factors; D010575:Pesticides; D012333:RNA, Messenger; D014157:Transcription Factors; C108831:daf-16 protein, C elegans; D004390:Chlorpyrifos; D003976:Diazinon
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