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Updated: Jun 18, 2026
09:32
Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
Published on: June 15, 2017
PDK1-mediated PI3K/Akt signaling regulates metabolic and developmental programs in a cosmopolitan pest
Minghui Yan1,2,3,4, Liangqian Xie1,2,3,4, Bingxue Li1,2,3,4
1State Key Laboratory of Agricultural and Forestry Biosecurity, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China.
Pest Management Science
|June 17, 2026
Summary
3-Phosphoinositide-dependent protein kinase 1 (PDK1) is crucial for insect development and metabolism. Targeting PDK1 in the diamondback moth offers a promising strategy for effective agricultural pest control.
Area of Science:
- Molecular Biology
- Insect Physiology
- Biochemistry
Background:
- 3-Phosphoinositide-dependent protein kinase 1 (PDK1) is a key kinase in the PI3K/Akt pathway.
- This pathway regulates metabolism and development in various animals.
- PDK1 functions in insects are not well understood.
Purpose of the Study:
- To identify and characterize PDK1 in the diamondback moth, Plutella xylostella.
- To investigate the role of PxPDK1 in insect development, metabolism, and reproduction.
- To assess PDK1 as a potential target for pest control.
Main Methods:
- Identification and characterization of PxPDK1 gene.
- CRISPR/Cas9-mediated gene knockout in Plutella xylostella.
- Analysis of developmental, reproductive, and metabolic parameters.
- Western blot analysis for Akt phosphorylation.
- Gene expression analysis.
- Cell proliferation assays.
Main Results:
- PxPDK1 has conserved kinase and pleckstrin homology domains and is highly expressed in multiple life stages.
- PxPDK1 knockout led to developmental delays, eclosion failure, impaired ovarian development, reduced fecundity, and lower egg hatchability.
- Loss of PxPDK1 decreased Akt phosphorylation, disrupted genes related to metabolism, reproduction, and cuticle formation, and reduced adult glycogen levels.
- PxPDK1 expression enhanced Sf9 cell proliferation.
Conclusions:
- PxPDK1 is essential for regulating insect development and metabolism.
- PDK1 represents a promising molecular target for controlling agricultural pests like the diamondback moth.
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