PMID- 29727771 OWN - NLM STAT- MEDLINE DCOM- 20180620 LR - 20240318 IS - 1879-1514 (Electronic) IS - 0166-445X (Print) IS - 0166-445X (Linking) VI - 200 DP - 2018 Jul TI - Bifenthrin causes transcriptomic alterations in mTOR and ryanodine receptor-dependent signaling and delayed hyperactivity in developing zebrafish (Danio rerio). PG - 50-61 LID - S0166-445X(18)30073-0 [pii] LID - 10.1016/j.aquatox.2018.04.003 [doi] AB - Over the last few decades, the pyrethroid insecticide bifenthrin has been increasingly employed for pest control in urban and agricultural areas, putting humans and wildlife at increased risk of exposure. Exposures to nanomolar (nM) concentrations of bifenthrin have recently been reported to alter calcium oscillations in rodent neurons. Neuronal calcium oscillations are influenced by ryanodine receptor (RyR) activity, which modulates calcium-dependent signaling cascades, including the mechanistic target of rapamycin (mTOR) signaling pathway. RyR activity and mTOR signaling play critical roles in regulating neurodevelopmental processes. However, whether environmentally relevant levels of bifenthrin alter RyR or mTOR signaling pathways to influence neurodevelopment has not been addressed. Therefore, our main objectives in this study were to examine the transcriptomic responses of genes involved in RyR and mTOR signaling pathways in zebrafish (Danio rerio) exposed to low (ng/L) concentrations of bifenthrin, and to assess the potential functional consequences by measuring locomotor responses to external stimuli. Wildtype zebrafish were exposed for 1, 3 and 5 days to 1, 10 and 50 ng/L bifenthrin, followed by a 14 d recovery period. Bifenthrin elicited significant concentration-dependent transcriptional responses in the majority of genes examined in both signaling cascades, and at all time points examined during the acute exposure period (1, 3, and 5 days post fertilization; dpf), and at the post recovery assessment time point (19 dpf). Changes in locomotor behavior were not evident during the acute exposure period, but were observed at 19 dpf, with main effects (increased locomotor behavior) detected in fish exposed developmentally to bifenthrin at 1 or 10 ng/L, but not 50 ng/L. These findings illustrate significant influences of developmental exposures to low (ng/L) concentrations of bifenthrin on neurodevelopmental processes in zebrafish. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Frank, Daniel F AU - Frank DF AD - Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; Aquatic Systems Biology, Department of Ecology and Ecosystem Management, Technical University of Munich, Muhlenweg 22, D-85354 Freising, Germany. FAU - Miller, Galen W AU - Miller GW AD - Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. FAU - Harvey, Danielle J AU - Harvey DJ AD - Department of Public Health Sciences, Division of Biostatistics, University of California, Davis, CA 95616, USA. FAU - Brander, Susanne M AU - Brander SM AD - Biology & Marine Biology, University of North Carolina, Wilmington, NC 28403, USA. FAU - Geist, Juergen AU - Geist J AD - Aquatic Systems Biology, Department of Ecology and Ecosystem Management, Technical University of Munich, Muhlenweg 22, D-85354 Freising, Germany. FAU - Connon, Richard E AU - Connon RE AD - Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. FAU - Lein, Pamela J AU - Lein PJ AD - Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. Electronic address: pjlein@ucdavis.edu. LA - eng GR - F32 ES024070/ES/NIEHS NIH HHS/United States GR - P30 ES005605/ES/NIEHS NIH HHS/United States GR - R01 ES014901/ES/NIEHS NIH HHS/United States PT - Journal Article DEP - 20180418 PL - Netherlands TA - Aquat Toxicol JT - Aquatic toxicology (Amsterdam, Netherlands) JID - 8500246 RN - 0 (Pyrethrins) RN - 0 (Ryanodine Receptor Calcium Release Channel) RN - 0 (Water Pollutants, Chemical) RN - 6B66JED0KN (bifenthrin) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Animals MH - Hypersensitivity, Delayed/etiology/metabolism MH - Locomotion/drug effects MH - Pyrethrins/*toxicity MH - Ryanodine Receptor Calcium Release Channel/*metabolism MH - Signal Transduction/*drug effects MH - TOR Serine-Threonine Kinases/*metabolism MH - Transcriptome/*drug effects MH - Water Pollutants, Chemical/*toxicity MH - Zebrafish/growth & development/*metabolism PMC - PMC5992106 MID - NIHMS964884 OTO - NOTNLM OT - Ca2+-dependent signaling OT - Fish behavior OT - Insecticide OT - Neurodevelopment OT - Pesticide OT - Pyrethroid EDAT- 2018/05/05 06:00 MHDA- 2018/06/21 06:00 PMCR- 2019/07/01 CRDT- 2018/05/05 06:00 PHST- 2018/02/02 00:00 [received] PHST- 2018/04/06 00:00 [revised] PHST- 2018/04/09 00:00 [accepted] PHST- 2018/05/05 06:00 [pubmed] PHST- 2018/06/21 06:00 [medline] PHST- 2018/05/05 06:00 [entrez] PHST- 2019/07/01 00:00 [pmc-release] AID - S0166-445X(18)30073-0 [pii] AID - 10.1016/j.aquatox.2018.04.003 [doi] PST - ppublish SO - Aquat Toxicol. 2018 Jul;200:50-61. doi: 10.1016/j.aquatox.2018.04.003. Epub 2018 Apr 18.