Cited by 96Neurobiology and Insect Physiology ResearchReceptor Mechanisms and SignalingInsect Resistance and Genetics

The steroid hormone 20-hydroxyecdysone binds to dopamine receptor to repress lepidopteran insect feeding and promote pupation

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Kang, Xin-Le, Zhang, Jun-Ying, Wang, Di, Zhao, Yu-Meng, Han, Xiao-Lin, Wang, Jin-Xing, Zhao, Xiao-Fan·2019·PLOS Genetics

Abstract

Holometabolous insects stop feeding at the final larval instar stage and then undergo metamorphosis; however, the mechanism is unclear. In the present study, using the serious lepidopteran agricultural pest Helicoverpa armigera as a model, we revealed that 20-hydroxyecdysone (20E) binds to the dopamine receptor (DopEcR), a G protein-coupled receptor, to stop larval feeding and promote pupation. DopEcR was expressed in various tissues and its level increased during metamorphic molting under 20E regulation. The 20E titer was low during larval feeding stages and high during wandering stages. By contrast, the dopamine (DA) titer was high during larval feeding stages and low during the wandering stages. Injection of 20E or blocking dopamine receptors using the inhibitor flupentixol decreased larval food consumption and body weight. Knockdown of DopEcR repressed larval feeding, growth, and pupation. 20E, via DopEcR, promoted apoptosis; and DA, via DopEcR, induced cell proliferation. 20E opposed DA function by repressing DA-induced cell proliferation and AKT phosphorylation. 20E, via DopEcR, induced gene expression and a rapid increase in intracellular calcium ions and cAMP. 20E induced the interaction of DopEcR with G proteins αs and αq. 20E, via DopEcR, induced protein phosphorylation and binding of the EcRB1-USP1 transcription complex to the ecdysone response element. DopEcR could bind 20E inside the cell membrane or after being isolated from the cell membrane. Mutation of DopEcR decreased 20E binding levels and related cellular responses. 20E competed with DA to bind to DopEcR. The results of the present study suggested that 20E, via binding to DopEcR, arrests larval feeding and promotes pupation.

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Authors
Kang, X.-L., Zhang, J.-Y., Wang, D., Zhao, Y.-M., Han, X.-L., Wang, J.-X., & Zhao, X.-F.
Affiliations
Shandong University (CN)
Corresponding author
Zhao, Xiao-Fan
Venue
PLOS Genetics
Published
2019-08-14
Volume
15
Issue
8
Pages
e1008331
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2968995517
Cited by
96
References
59
Citations by year
2026: 5 · 2025: 13 · 2024: 15 · 2023: 18 · 2022: 14 · 2021: 22 · 2020: 9
FWCI
5.38
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
National Natural Science Foundation of China-Yunnan Joint Fund (31730083, 31572328)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Insect Resistance and Genetics
Keywords
20-hydroxyecdysone, dopamine receptors, Helicoverpa armigera, pupation, metamorphosis, G protein-coupled receptors, ecdysone receptor, Akt phosphorylation, apoptosis, cell proliferation, intracellular calcium, cAMP signaling, G protein alpha subunit, ecdysone response element, insect molting
MeSH terms
Animals, Dopamine, Ecdysterone, Feeding Behavior, Flupenthixol, Larva, Moths, Receptors, Dopamine, Dopamine Antagonists, Molting, Insect Proteins, RNA Interference, Gene Knockdown Techniques, Sf9 Cells

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