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Lung tissue storage: optimizing conditions for future use in molecular research
Dominic T K Keating1, Andrea P Malizia, D Sadlier
1General Clinical Research Unit, School of Medicine and Medical Sciences, University College Dublin, Mater Misericordiae University Hospital, and Dublin Molecular Medicine Centre, Dublin, Ireland.
Experimental Lung Research
|October 14, 2008
Summary
RNAlater best preserves lung tissue for high-quality RNA. This method yields superior nucleic acid preservation, improving results in microarray and PCR analyses.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- Oligonucleotide microarray performance is highly dependent on RNA quality.
- Effective tissue harvesting and preservation techniques are crucial for reliable molecular analysis.
Purpose of the Study:
- To evaluate the efficacy of different preservation methods for human lung tissue RNA.
- To determine the optimal storage condition for maintaining RNA integrity and yield for downstream applications.
Main Methods:
- Human lung tissues were preserved using RNAlater, phosphate-buffered saline, TRIzol, and liquid nitrogen.
- RNA quality was assessed using denaturing gel electrophoresis, Agilent bioanalysis, real-time PCR, and Affymetrix chip hybridization.
Main Results:
- RNAlater demonstrated superior RNA quality in gel electrophoresis and bioanalysis.
- Samples preserved in RNAlater yielded significantly higher RNA quantities (r18s via PCR, P < .05).
- RNAlater-preserved samples resulted in improved Affymetrix chip hybridization (P < .05).
Conclusions:
- RNAlater is the most effective method for preserving nucleic acids in human lung tissue.
- Optimal RNA preservation using RNAlater enhances the reliability and quality of genomic analyses, including microarrays.
