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Related Concept Videos

Experimental RNAi02:15

Experimental RNAi

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RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
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Updated: Feb 17, 2026

Double-stranded RNA Oral Delivery Methods to Induce RNA Interference in Phloem and Plant-sap-feeding Hemipteran Insects
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Implementing the sterile insect technique with RNA interference - a review.

Michael Darrington1, Tamas Dalmay1, Neil I Morrison2

  • 1School of Biological Sciences University of East Anglia Norwich Research Park Norwich Norfolk NR4 7TJ UK.

Entomologia Experimentalis Et Applicata
|December 5, 2017
PubMed
Summary

RNA interference (RNAi) offers a novel method for insect pest control, potentially integrating with sterile insect technique. Environmental delivery of RNAi (eRNAi) shows promise, but factors like target mRNA structure and delivery methods influence its effectiveness.

Keywords:
SITdouble‐stranded RNAenvironmental RNAiinsect controlnon‐GM pest control

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Area of Science:

  • Entomology
  • Molecular Biology
  • Pest Management

Background:

  • RNA interference (RNAi) is a conserved gene-silencing mechanism.
  • Its application in insect pest control, particularly with sterile insect technique (SIT), is under investigation.
  • Understanding RNAi mechanisms is crucial for developing effective pest management strategies.

Purpose of the Study:

  • To review the molecular mechanisms of RNAi in insect pests.
  • To evaluate the potential of environmentally delivered RNAi (eRNAi) for insect control.
  • To identify factors influencing eRNAi efficiency and delivery.

Main Methods:

  • Literature review of RNAi mechanisms in various species, including Drosophila melanogaster and Homo sapiens.
  • Analysis of studies on eRNAi across different insect orders.
  • Examination of factors affecting double-stranded (ds) RNA synthesis, delivery, and gene knockdown efficiency.

Main Results:

  • RNAi genes are generally conserved but show variations in form and function across taxa.
  • eRNAi is a plausible non-genetically modified system for insect population control.
  • Factors like target mRNA secondary structure and dsRNA sequence impact eRNAi potency.
  • Insect taxonomy does not reliably predict eRNAi response efficiency.
  • Endocytosis and transport channels are key for dsRNA uptake; intermediary carriers can enhance delivery and evade host defenses.

Conclusions:

  • RNAi is a promising tool for insect pest management, adaptable for sterile insect technique integration.
  • Environmental RNAi (eRNAi) efficacy depends on molecular and delivery factors, not solely on insect taxonomy.
  • Further research into dsRNA uptake mechanisms and optimized delivery systems is essential for successful eRNAi implementation.