Receptor-binding affinity and larvicidal activity of tetrahydroquinoline-type ecdysone agonists against Aedes albopictus

• Published in: Journal of Pesticide Science Vol. 46; no. 1; pp. 101 - 108
• Main Authors: Ueno, Minori, Yokoi, Taiyo, Nakagawa, Yoshiaki, Miyagawa, Hisashi
• Format: Journal Article
• Language: English; Japanese
• Published: Japan Pesticide Science Society of Japan 20.02.2021; Japan Science and Technology Agency
• Subjects: Aedes albopictus; Affinity; Agonists; Binding; Ecdysone; Ecdysone receptors; Hydrophobicity; Insect control; insecticide; Larvicides; mosquito; Mosquitoes; Physicochemical properties; Receptors; Regression analysis; Regular; Structure-activity relationships; Synthesis; tetrahydroquinoline; insecticide; tetrahydroquinoline; ecdysone; mosquito
• ISSN: 1348-589X; 1349-0923
• DOI: 10.1584/jpestics.D20-089

Tetrahydroquinolines (THQs), a class of nonsteroidal ecdysone agonists, are good candidates for novel mosquito control agents because they specifically bind to mosquito ecdysone receptors (EcRs). We have recently performed quantitative structure–activity relationship (QSAR) analyses of THQs to elucidate the physicochemical properties important for the ligand–receptor interaction. Based on previous QSAR results, here, we newly synthesized 15 THQ analogs with a heteroaryl group at the acyl moiety and evaluated their binding affinity against Aedes albopictus EcRs. We also measured the larvicidal activity of the combined set of previously and newly synthesized compounds against A. albopictus to examine the contribution of receptor-binding to larvicidal activity. Multiple regression analyses showed that the binding affinity and the molecular hydrophobicity of THQs are the key determinants of their larvicidal activity.