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A reliable external control for ribonuclease protection assays
P A Scott1, K Smith, R Bicknel
1Molecular Angiogenesis Laboratory, Imperial Cancer Research Fund, John Radcliffe Hospital, Oxford OX3 9DU, UK.
Nucleic Acids Research
|March 15, 1997
Summary
This study introduces a novel external RNA control method for more reliable gene expression analysis in tumor samples. This technique ensures accurate, lane-by-lane comparisons, especially with limited sample availability.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- Accurate gene expression analysis is crucial for understanding tumor biology.
- Standardization of RNA analysis across multiple samples can be challenging.
- External controls are needed to validate RNA quantification methods.
Purpose of the Study:
- To develop a reliable external spiked human RNA control for gene expression analysis.
- To enhance the accuracy of gene expression assessment in tumor extracts.
- To provide a method for uniform comparison of gene expression data.
Main Methods:
- Generating an external spiked human RNA control using antisense and sense riboprobes.
- Utilizing flanking RNA polymerase sites (T3 and T7) for probe synthesis.
- Employing differential hybridization concentrations to separate control and endogenous RNA fragments.
Main Results:
- The method allows for lane-by-lane control of all subsequent analysis steps.
- Enables uniform comparison of gene of interest as a fraction of total RNA.
- Successfully separates the spiked control product from endogenous fragments.
Conclusions:
- The described method enhances the reliability of gene expression assessment in tumor extracts.
- This technique is broadly applicable to various riboprobes with T3 and T7 RNA polymerase sites.
- Externally added riboprobes can serve as effective spike controls for endogenous gene expression analysis.