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Extraction of RNA from single frozen sections
G P Taylor1, D A Troyer, T A Giambernardi
1Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio 78284, USA.
The Journal of Pathology
|June 6, 1998
Summary
This study introduces a fast RNA extraction method for frozen tissue sections, enabling gene expression analysis using reverse transcriptase-polymerase chain reaction (RT-PCR) on small samples.
Area of Science:
- Molecular Biology
- Histopathology
- Biochemistry
Background:
- Reverse transcriptase-polymerase chain reaction (RT-PCR) is sensitive for detecting gene expression changes.
- Traditional RNA isolation methods are time-consuming and unsuitable for small samples like frozen sections.
Purpose of the Study:
- To develop a rapid RNA extraction technique for individual frozen histological sections.
- To enable gene expression analysis from limited tissue samples.
Main Methods:
- Incubating frozen sections in an RT-PCR compatible buffer with RNase inhibitor and dithiothreitol.
- Assessing RNA stability at room temperature and after freezing.
Main Results:
- RNA extraction from frozen sections is rapid and efficient.
- Isolated RNA is stable at room temperature for up to 3 hours.
- RNA in dry sections remains stable for 2 weeks at room temperature.
- Adjacent sections can be used for concurrent histological analyses.
Conclusions:
- This simple and economical method facilitates rapid RNA extraction from frozen sections.
- The technique supports parallel prognostic screening with histopathological analysis.
- It expands the utility of RT-PCR for gene expression studies on small tissue samples.