2. Academic Validation
  3. Hsp70 and Hsp90 Elaborately Regulate RNAi Efficiency in Plutella xylostella

Hsp70 and Hsp90 Elaborately Regulate RNAi Efficiency in Plutella xylostella

  • Int J Mol Sci. 2023 Nov 10;24(22):16167. doi: 10.3390/ijms242216167.
Sujie Lin 1 2 3 4,  Jie Yang 1 2 3 4,  Weiqing Wang 1 2 3 4,  Pengrong Huang 1 2 3 4,  Muhammad Asad 1 2 3 4,  Guang Yang 1 2 3 4
Affiliations

Affiliations

  • 1 State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
  • 2 Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou 350002, China.
  • 3 Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou 350002, China.
  • 4 Key Laboratory of Green Pest Control (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 350002, China.
PMID: 38003357 DOI: 10.3390/ijms242216167
Abstract

Heat-shock proteins (HSPs) serve as molecular chaperones in the RNA interference (RNAi) pathway of eukaryotic organisms. In model organisms, HSP70 and HSP90 facilitate the folding and remodeling of the client protein Argonaute (Ago). However, the specific function of HSPs in the RNAi pathway of Plutella xylostella (L.) (Lepidoptera: Plutellidae) remains unknown. In this study, we identified and analyzed the coding sequences of PxHsc70-4 and PxHsp83 (also known as PxHsp90). Both PxHsc70-4 and PxHsp83 exhibited three conserved domains that covered a massive portion of their respective regions. The knockdown or inhibition of PxHsc70-4 and PxHsp83 in vitro resulted in a significant increase in the gene expression of the dsRNA-silenced reporter gene PxmRPS18, leading to a decrease in its RNAi efficiency. Interestingly, the overexpression of PxHsc70-4 and PxHsp83 in DBM, Sf9, and S2 cells resulted in an increase in the bioluminescent activity of dsRNA-silenced luciferase, indicating a decrease in its RNAi efficiency via the overexpression of HSP70/HSP90. Furthermore, the inhibition of PxHsc70-4 and PxHsp83 in vivo resulted in a significant increase in the gene expression of PxmRPS18. These findings demonstrated the essential involvement of a specific quantity of Hsc70-4 and Hsp83 in the siRNA pathway in P. xylostella. Our study offers novel insights into the roles played by HSPs in the siRNA pathway in lepidopteran insects.

Keywords

Hsp70; Hsp90; Plutella xylostella; RNA interference.

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