6 research outputs found
Neurotoxic action of microcystin-LR is reflected in the transcriptional stress response of Caenorhabditis elegans
Hormetins, antioxidants and prooxidants: defining quercetin-, caffeic acid- and rosmarinic acid-mediated life extension in C. elegans
Two organobromines trigger lifespan, growth, reproductive and transcriptional changes in Caenorhabditis elegans
Adsorbable organic bromine compounds (AOBr) in aquatic samples:a nematode-based toxicogenomic assessment of the exposure hazard
UV-induced DNA damage in Cyclops abyssorum tatricus populations from clear and turbid alpine lakes
Neurotoxic action of microcystin-LR is reflected in the transcriptional stress response of Caenorhabditis elegans
Cyanobacterial blooms in aquatic environments are frequently characterized by elevated levels of microcystins, a potent hepatotoxin. Here we exposed the nematode Caenorhabditis elegans with environmentally realistic concentrations of MC-LR to explore its non-hepatic toxicity. Lifespan, reproduction and growth assays confirmed the toxic potential of 100ÎĽg/L MC-LR even in this liver-lacking invertebrate. Whole-genome microarray analysis revealed that a neuromodulating action was the dominant response in nematodes challenged with 100ÎĽg/L MC-LR. Indeed, most of the 201 differentially expressed genes were associated with neurobehavior, neurogenesis, and signaling associated pathways. In addition, a whole-genome miRNA-microarray highlighted that, in particular, members of the let-7 family were differentially regulated. These miRNAs are involved in the developmental timing of cell fates, including neurons, and are probably also part of the stress response system. To conclude, neurological modulation is the main transcriptional stress response in C. elegans exposed to MC-LR