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siRNA - Small Interfering RNAs

siRNA - Small Interfering RNAs

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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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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Related Experiment Video

Updated: Jun 15, 2026

An Optimized Quantitative Pull-Down Analysis of RNA-Binding Proteins Using Short Biotinylated RNA

An Optimized Quantitative Pull-Down Analysis of RNA-Binding Proteins Using Short Biotinylated RNA

Published on: February 17, 2023

Bioinformatic approaches to siRNA selection and optimization.

Pirkko Muhonen¹, Harry Holthofer

¹Centre for BioAnalytical Sciences, Dublin City University, Dublin, Ireland.

Methods in Molecular Biology (Clifton, N.J.)

|March 11, 2010

Summary

Designing effective short interfering RNA (siRNA) molecules is crucial for RNA interference (RNAi) therapeutics. This study presents advanced parameters and options for a highly efficient siRNA candidate search, improving experimental success.

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Last Updated: Jun 15, 2026

An Optimized Quantitative Pull-Down Analysis of RNA-Binding Proteins Using Short Biotinylated RNA

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Published on: February 17, 2023

MISSION esiRNA for RNAi Screening in Mammalian Cells

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Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

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Published on: August 9, 2019

Area of Science:

Molecular Biology
Genetics
Bioinformatics

Background:

RNA interference (RNAi) using short interfering RNA (siRNA) is a significant genetic tool with therapeutic potential.
Current siRNA design relies on empirical and rational approaches, considering target messenger RNA accessibility and RNAi pathway events.
Effective siRNA design is critical for successful RNAi experiments and therapeutic development.

Purpose of the Study:

To present advanced parameters and options for designing highly efficient siRNA candidates.
To enhance the search process for effective siRNA molecules.
To improve the success rate of RNAi-based experiments and therapies.

Main Methods:

Utilizing advanced bioinformatic approaches for siRNA design.
Incorporating both empirical and rational design strategies.
Focusing on key RNAi pathway events, including target messenger RNA accessibility.

Main Results:

Demonstration of advanced siRNA design parameters.
Introduction of novel options for efficient siRNA candidate selection.
Improved methodology for identifying active and specific siRNA molecules.

Conclusions:

Advanced design parameters significantly enhance siRNA efficiency.
The presented options facilitate a more effective search for optimal siRNA candidates.
This work contributes to the development of successful RNAi-based therapeutics.