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From Global to Local-New Insights into Features of Pyrethroid Detoxification in Vector Mosquitoes.
Black, William C; Snell, Trey K; Saavedra-Rodriguez, Karla; Kading, Rebekah C; Campbell, Corey L.
  • Black WC; Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
  • Snell TK; Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
  • Saavedra-Rodriguez K; Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
  • Kading RC; Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
  • Campbell CL; Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
Insects ; 12(4)2021 Mar 24.
Article en En | MEDLINE | ID: mdl-33804964
ABSTRACT
The threat of mosquito-borne diseases continues to be a problem for public health in subtropical and tropical regions of the world; in response, there has been increased use of adulticidal insecticides, such as pyrethroids, in human habitation areas over the last thirty years. As a result, the prevalence of pyrethroid-resistant genetic markers in natural mosquito populations has increased at an alarming rate. This review details recent advances in the understanding of specific mechanisms associated with pyrethroid resistance, with emphasis on features of insecticide detoxification and the interdependence of multiple cellular pathways. Together, these advances add important context to the understanding of the processes that are selected in resistant mosquitoes. Specifically, before pyrethroids bind to their targets on motoneurons, they must first permeate the outer cuticle and diffuse to inner tissues. Resistant mosquitoes have evolved detoxification mechanisms that rely on cytochrome P450s (CYP), esterases, carboxyesterases, and other oxidation/reduction (redox) components to effectively detoxify pyrethroids to nontoxic breakdown products that are then excreted. Enhanced resistance mechanisms have evolved to include alteration of gene copy number, transcriptional and post-transcriptional regulation of gene expression, as well as changes to cellular signaling mechanisms. Here, we outline the variety of ways in which detoxification has been selected in various mosquito populations, as well as key gene categories involved. Pathways associated with potential new genes of interest are proposed. Consideration of multiple cellular pathways could provide opportunities for development of new insecticides.
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Texto completo: 1 Banco de datos: MEDLINE Tipo de estudio: Risk_factors_studies Idioma: En Año: 2021 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Tipo de estudio: Risk_factors_studies Idioma: En Año: 2021 Tipo del documento: Article