ArticleMolecular biology reports2020
Targeting genes involved in nucleopolyhedrovirus DNA multiplication through RNA interference technology to induce resistance against the virus in silkworms.
Article in Molecular biology reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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4 authors at 2 institutions in 1 country.
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Abstract
RNA interference (RNAi) has become an efficient tool for inducing resistance to viruses in many organisms. In this study, Escherichia coli cells were engineered to produce stable double-stranded RNA (dsRNA) against the nucleopolyhedrosis virus to elicit RNAi in silkworms. The immediate-early-1 (ie-1) and late expression factor-1 (lef-1) genes of the Bombyx mori nucleopolyhedrovirus (BmNPV) involved in viral DNA multiplication were cloned in the plasmid L4440 under the influence of the double T7 promoter and transformed to E. coli HT115 DE3 host cells. On induction with isopropyl β-D-thiogalactopyranoside, these cells efficiently produced dsRNA of the cloned genes. The B. mori larvae were fed with 50 µL of E. coli cells expressing ie-1 and lef-1 dsRNAs (each approximately 25 µg) to elicit RNAi. The semi-quantitative and quantitative PCR analysis of RNA from the midgut of the dsRNA-fed larvae revealed a significant reduction in the expression of the target genes involved in BmNPV multiplication, which restricted virus copy numbers to 100 compared with 1.9 × 10
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