Nicotinic acetylcholine receptors: targets for commercially important insecticides

Area of Science:

• Neuroscience
• Entomology
• Toxicology

Background:

• Nicotinic acetylcholine receptors (nAChRs) are vital excitatory neurotransmitter receptors in both vertebrates and invertebrates.
• In insects, nAChRs are a primary target for numerous naturally occurring and synthetic compounds with potent insecticidal activity.
• Plant-derived compounds acting as nAChR agonists or antagonists suggest an evolutionary defense mechanism against herbivores.

Purpose of the Study:

• To review the role of nicotinic acetylcholine receptors (nAChRs) as targets for insecticidal compounds.
• To highlight natural and synthetic insecticides that interact with insect nAChRs.
• To discuss the emerging issue of insecticide resistance affecting nAChR-targeting agents.

Main Methods:

• Literature review of scientific publications on nAChRs and insecticides.
• Analysis of compounds targeting insect nAChRs, including natural products and synthetic chemicals.
• Examination of evidence regarding the development of resistance to nAChR-acting insecticides.

Main Results:

• Nicotine and Spinosad are natural compounds that target insect nAChRs and are used as commercial insecticides.
• Neonicotinoids, a major class of insecticides since the 1990s, are potent selective agonists of insect nAChRs.
• Growing evidence indicates the evolution of resistance in insect populations to insecticides targeting nAChRs.

Conclusions:

• Insect nicotinic acetylcholine receptors are critical targets for effective insect control strategies.
• The efficacy of insecticides like nicotine, Spinosad, and neonicotinoids relies on their interaction with insect nAChRs.
• Insecticide resistance poses a significant challenge to the continued effectiveness of nAChR-targeting agents in pest management.