Related Experiment Video
Updated: Jul 6, 2026

10:28
Probe-based Real-time PCR Approaches for Quantitative Measurement of microRNAs
Published on: April 14, 2015
A step-by-step procedure to analyze the efficacy of siRNA using real-time PCR
Angie Cheng1, Charles L Johnson, Lance P Ford
1Ambion, Applied Biosystems Inc., Austin, TX, USA.
Methods in Molecular Biology (Clifton, N.J.)
|March 29, 2008
Summary
Short interfering RNA (siRNA) enables loss-of-function studies for gene analysis and genome-wide screening. This guide details optimizing siRNA experiments, from cell culture to quantitative real-time PCR analysis, for successful knockdown.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- Short interfering RNA (siRNA) is a key tool for RNA interference (RNAi) enabling gene knockdown.
- siRNA facilitates loss-of-function (LOF) studies across diverse cell types and model systems.
- Applications range from single-gene analysis to large-scale genomic screening of biological pathways.
Purpose of the Study:
- To provide a comprehensive, step-by-step protocol for conducting siRNA knockdown experiments.
- To highlight critical factors influencing siRNA efficacy, including design, delivery, and analysis.
- To guide researchers in optimizing their siRNA experiments for reliable results.
Main Methods:
- Detailed procedures for cell culture maintenance and preparation.
- Step-by-step guidance on siRNA design and delivery optimization.
- Methods for analyzing knockdown efficiency using quantitative real-time PCR (qRT-PCR).
Main Results:
- Successful implementation of siRNA knockdown protocols is demonstrated.
- Optimization strategies for siRNA design and delivery are presented.
- Validation of knockdown efficacy through qRT-PCR analysis is detailed.
Conclusions:
- Effective siRNA knockdown requires careful optimization of multiple experimental parameters.
- Standardized protocols ensure reproducibility and success in loss-of-function studies.
- This chapter serves as a practical resource for researchers performing siRNA experiments.

