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Quantitative molecular analysis of laser-microdissected paraffin-embedded human tissues
U Lehmann1, O Bock, S Glöckner
1Institute of Pathology, Medizinische Hochschule Hannover, Germany. lehmann.ulrich@mh-hannover.de
Summary
Laser microdissection combined with real-time PCR allows precise quantification of nucleic acids from archival tissues. This powerful tool aids in studying genetic and gene expression changes in diseases.
Area of Science:
- Molecular pathology
- Genomics
- Histopathology
Background:
- Laser microdissection (LMD) isolates pure cell populations from formalin-fixed paraffin-embedded (FFPE) tissues.
- LMD-isolated cells are suitable for various qualitative molecular assays.
- Real-time PCR (qPCR) enables reliable quantification of minute nucleic acid quantities.
Purpose of the Study:
- To evaluate the application of qPCR for quantifying nucleic acids from LMD-isolated archival tissues.
- To highlight the potential of combining LMD and qPCR for pathological analysis.
Main Methods:
- Laser microdissection of FFPE tissue sections.
- Nucleic acid (DNA/RNA) isolation from microdissected cells.
- Quantitative analysis using real-time PCR, even after immunohistochemical staining.
Main Results:
- Successful quantification of DNA and RNA from microdissected archival tissues using qPCR.
- Demonstrated feasibility even after immunohistochemical staining.
- Enabled precise analysis of quantitative nucleic acid changes in pathological alterations.
Conclusions:
- The combination of LMD and qPCR is a powerful tool for morphologists.
- This technology facilitates the study of quantitative genomic alterations and gene expression patterns.
- It aids in understanding reactive and neoplastic tissue changes.