Abstract
Mosquitoes transmit many damaging vector-borne diseases. Unfortunately, the rise of insecticide resistance has become a major obstacle to mosquito control. A preliminary study showed that a CYP6 cluster is significant for deltamethrin resistance in colonized Culex pipiens pallens. Here, several field strains were collected to explore the association of the cluster in deltamethrin tolerance. We examined the effect of deltamethrin treatment on the cluster expression at a deltamethrin concentration of LC50 in these strains using five time points. As a result, both P450 induction and constitutive overexpression were associated with deltamethrin resistance. Deltamethrin could stimulate different expression sets in the P450 cluster in different strains, predominately correlated with the resistance level of the strain. Our results will offer more insight into working with the characterization of P450s related to insecticide resistance.
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