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Title: New reporter gene assays for detecting natural and synthetic molting hormone agonists using yeasts expressing ecdysone receptors of various insects
Authors: Ito-Harashima, Sayoko
Matsuura, Mai
Kawanishi, Masanobu
Nakagawa, Yoshiaki  kyouindb  KAKEN_id
Yagi, Takashi
Author's alias: 中川, 好秋
Keywords: 20-hydroxyecdysone
ecdysone receptor
insect growth regulator
molting hormone agonist
yeast reporter gene assay
Issue Date: Jul-2017
Publisher: Wiley
Journal title: FEBS Open Bio
Volume: 7
Issue: 7
Start page: 995
End page: 1008
Abstract: Synthetic nonsteroidal ecdysone agonists, a class of insect growth regulators (IGRs), target the ecdysone receptor (EcR), which forms a heterodimer with ultraspiracle (USP) to transactivate ecdysone response genes. These compounds have high binding affinities to the EcR–USP complexes of certain insects and their toxicity is selective for certain taxonomic orders. In the present study, we developed reporter gene assay (RGA) systems to detect molting hormone (ecdysone) activity by introducing EcR–USP cDNA and a bacterial lacZ reporter gene into yeast. EcR and USP were derived from the insect species of three different taxonomic orders: Drosophila melanogaster (Diptera), Chilo suppressalis (Lepidoptera), and Leptinotarsa decemlineata (Coleoptera). Transcriptional coactivator taiman (Tai) cDNA cloned from D. melanogaster was also used in this RGA system. This yeast RGA system responded to various EcR ligands in a dose-dependent and ecdysteroid-specific manner. Furthermore, the insect order-selective ligand activities of synthetic nonsteroidal ecdysone agonists were linearly related to their binding activities, which were measured against in vitro translated EcR–USP complexes. Our newly established yeast RGA is useful for screening new molting hormone agonists that work selectively on target insects
Rights: © 2017 The Authors. Published by FEBS Press and John Wiley & Sons Ltd.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited
DOI(Published Version): 10.1002/2211-5463.12239
PubMed ID: 28680812
Appears in Collections:Journal Articles

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