Gluconeogenic compensation renders glycogen phosphorylase non-essential as an insecticidal target in Plutella xylostella.

Glycogen phosphorylase is non-essential for Plutella xylostella survival due to gluconeogenic compensation, despite potent in vitro inhibition.

• Why it matters: Understanding whether GP can serve as an effective insecticidal target is crucial for developing new pest control strategies, especially given the redundancy in insect metabolic pathways.
• What they did: Researchers tested a mammalian GP inhibitor (IC50 = 2.96 nM) on P. xylostella, performed molecular docking, and used RNAi to knock down PxGP, assessing effects on development and enzyme activity.
• The result: Inhibition of PxGP did not impair insect development or survival, as insects upregulated gluconeogenic enzymes and alternative carbon sources, indicating GP is functionally non-essential under tested conditions.