Related Experiment Videos
PCR-based quantification of amplified RNA from laser microdissected mouse liver samples
Tobias Cantz1, Andrea Jochheim, Alexandra Cieslak
1Department of Gastroenterology, Hepatology and Endocrinology, Hanover Medical School Hanover, Carl-Neuberg-Strabetae 1, D-30625, Hanover, Germany.
Experimental and Molecular Pathology
|July 2, 2003
Summary
Researchers developed a method combining laser-assisted tissue preparation and RNA amplification for accurate gene expression analysis in small samples. This technique enhances sensitivity, making low-level gene detection possible in microdissected tissues.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- Quantitative reverse transcription-polymerase chain reaction (RT-PCR) and microarray analysis are sensitive gene expression quantification methods.
- These methods typically require microgram quantities of RNA, limiting their use with small tissue samples like microdissected embryonic or regenerating structures.
Purpose of the Study:
- To develop and validate a method for accurate and linear gene expression analysis in small tissue samples.
- To assess the feasibility of using RNA amplification in conjunction with laser-assisted tissue preparation for gene expression studies.
Main Methods:
- Combined laser-assisted tissue preparation with RNA amplification and quantitative RT-PCR.
- Analyzed gene expression in laser-microdissected fetal liver tissue and regenerative nodules from EGFP-marked transplanted fetal cells.
- Evaluated the accuracy and linearity of gene expression quantification after one and two rounds of RNA amplification.
Main Results:
- RNA isolated from laser-microdissected tissues showed significantly increased yield after amplification.
- The quantitative expression ratio of albumin and GAPDH genes was conserved after one and two amplification rounds.
- Low-level expressed genes, such as C/EBPbeta, became detectable in small samples after two amplification rounds.
Conclusions:
- RNA amplification is effective in increasing RNA yield from small, laser-microdissected tissue samples.
- The amplification protocol preserves the quantitative expression ratios of key genes.
- This combined approach enables sensitive gene expression analysis, including low-abundance transcripts, in limited tissue samples.