The actions of the neonicotinoid imidacloprid on cholinergic neurons of Drosophila melanogaster.
Article Details
- CitationCopy to clipboard
Jepson JE, Brown LA, Sattelle DB
The actions of the neonicotinoid imidacloprid on cholinergic neurons of Drosophila melanogaster.
Invert Neurosci. 2006 Mar;6(1):33-40. Epub 2006 Feb 2.
- PubMed ID
- 16453147 [ View in PubMed]
- Abstract
The neonicotinoid insecticide imidacloprid is an agonist on insect nicotinic acetylcholine receptors (nAChRs). We utilised fura-2-based calcium imaging to investigate the actions of imidacloprid on cultured GFP-tagged cholinergic neurons from the third instar larvae of the genetic model organism Drosophila melanogaster. We demonstrate dose-dependent increases in intracellular calcium ([Ca2+]i) in cholinergic neurons upon application of imidacloprid (10 nM-100 muM) that are blocked by nAChR antagonists mecamylamine (10 microM) and alpha-bungarotoxin (alpha-BTX, 1 microM). When compared to other (untagged) neurons, cholinergic neurons respond to lower concentrations of imidacloprid (10-100 nM) and exhibit larger amplitude responses to higher (1-100 microM) concentrations of imidacloprid. Although imidacloprid acts via nAChRs, increases in [Ca2+]i also involve voltage-gated calcium channels (VGCCs) in both groups of neurons. Thus, we demonstrate that cholinergic neurons express nAChRs that are highly sensitive to imidacloprid, and demonstrate a role for VGCCs in amplifying imidacloprid-induced increases in [Ca2+]i.
DrugBank Data that Cites this Article
- Drugs