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- W3152635651 endingPage "104853" @default.
- W3152635651 startingPage "104853" @default.
- W3152635651 abstract "Lepidopteran insects are highly refractory to oral RNA interference (RNAi). Degradation, impaired cellular uptake and intracellular transport of double-stranded RNA (dsRNA) are considered the major factors responsible for the reduced RNAi efficiency in these insects. In this study, the potential of lectins to improve dsRNA delivery and RNAi efficacy was evaluated. First, a fusion protein consisting of the Galanthus nivalis agglutinin (GNA) and a dsRNA binding domain was developed, further referred to as GNA:dsRBD (GNAF). Then, its ability to increase dsRNA uptake and transfection efficiency in lepidopteran midgut cells was evaluated, as well as its ability to protect and promote the RNAi response in the beet armyworm Spodoptera exigua. Confocal microscopy analysis showed that GNAF-complexed dsRNA was internalized faster in Choristoneura fumiferana midgut CF1 cells (1 min) compared to naked dsRNA (>1 h). The faster uptake was also correlated with an increased RNAi efficiency in these CF1 cells. In vivo feeding bioassays with GNAF-complexed dsRNA led to an increased mortality in S. exigua compared to the controls. By targeting the essential gene V-ATPase A, we observed that the mortality increased to 48% in the GNAF-dsRNA treatment compared to only 8.3% and 6.6% in the control treatments with the naked dsRNA and the GNAF, respectively." @default.
- W3152635651 created "2021-04-26" @default.
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- W3152635651 date "2021-06-01" @default.
- W3152635651 modified "2023-09-28" @default.
- W3152635651 title "Accelerated delivery of dsRNA in lepidopteran midgut cells by a Galanthus nivalis lectin (GNA)-dsRNA-binding domain fusion protein" @default.
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- W3152635651 doi "https://doi.org/10.1016/j.pestbp.2021.104853" @default.
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