Accelerated delivery of dsRNA in lepidopteran midgut cells by a Galanthus nivalis lectin (GNA)-dsRNA-binding domain fusion protein

نویسندگان

چکیده

Lepidopteran insects are highly refractory to oral RNA interference (RNAi). Degradation, impaired cellular uptake and intracellular transport of double-stranded (dsRNA) considered the major factors responsible for reduced RNAi efficiency in these insects. In this study, potential lectins improve dsRNA delivery efficacy was evaluated. First, a fusion protein consisting Galanthus nivalis agglutinin (GNA) binding domain developed, further referred as GNA:dsRBD (GNAF). Then, its ability increase transfection lepidopteran midgut cells evaluated, well protect promote response beet armyworm Spodoptera exigua . Confocal microscopy analysis showed that GNAF-complexed internalized faster Choristoneura fumiferana CF1 (1 min) compared naked (>1 h). The also correlated with an increased cells. vivo feeding bioassays led mortality S. controls. By targeting essential gene V-ATPase A, we observed 48% GNAF-dsRNA treatment only 8.3% 6.6% control treatments GNAF, respectively. • Low stability speed can reduce GNA could act promising carrier/formulation delivery. A GNA-dsRNA designed produced. This carrier accelerated Feeding carrier-dsRNA complex larvae.

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ژورنال

عنوان ژورنال: Pesticide Biochemistry and Physiology

سال: 2021

ISSN: ['0048-3575', '1095-9939']

DOI: https://doi.org/10.1016/j.pestbp.2021.104853