Expression of neuronal receptors for novel insecticide discovery

Overview

This research platform offers functional expression and pharmacological characterization of neuronal receptors from key insect pest species and non-target organisms. By cloning and expressing nicotinic acetylcholine receptors, GABA receptors, and glutamate-gated chloride channels in Xenopus oocytes, the technology enables screening of novel active agents, understanding of their modes of action, and development of compounds with higher selectivity toward pest species over beneficial pollinators.

The approach supports insecticide discovery by providing defined molecular targets for compound testing, resistance-breaking evaluation through mutation studies, and species-specific pharmacological profiling. This capability is critical for agricultural chemical companies seeking to develop next-generation insecticides with improved efficacy and pollinator safety.

Technical specifications

Receptor targets validated:

• Nicotinic acetylcholine receptors (including alpha6 subunit, confirmed target of spinosad)
• GABA receptors (with splice variants characterized for fipronil potency)
• Glutamate-gated chloride channels

Key capabilities demonstrated:

• Expression of receptors from aphids (Acyrthosiphon pisum), honey bees (Apis mellifera), and mosquitoes
• Electrophysiological characterization of receptor sensitivity to neonicotinoids, spinosad, fipronil, and ivermectin
• Analysis of resistance mutations found in field populations and their impact on compound potency
• Investigation of RNA editing effects on receptor pharmacology
• Alternative splice variant analysis for understanding receptor diversity

Species coverage planned: Fall armyworm, diamondback moth, bollworms, stink bugs, thrips, mites, and additional pest and pollinator species.

Technology readiness level

The platform has been validated through published electrophysiology studies demonstrating functional expression of multiple receptor types from several insect species. Current work is expanding to additional pest species and incorporating resistance mutations into expressed receptors. The 1-3 year study timeline depends on the number of receptors and species to be tested. The laboratory is seeking partnerships to provide test compounds, funding for reagents, and support for key personnel to scale receptor expression and compound screening operations.