Nucleic Acids Research, Vol 27, Issue 16 e12-e12, Copyright © 1999 by Oxford University Press
NJ Coombs, AC Gough and JN Primrose
Archival, formalin-fixed, paraffin-embedded tissue is an invaluable
resource for molecular genetic studies but the extraction of high quality
nucleic acid may be problematic. We have optimised DNA extraction by
comparing 10 protocols, including a commercially available kit and a novel
method that utilises a thermal cycler. The thermal cycler and Chelex-100
extraction method yielded DNA capable of amplification by PCR from every
block and 61% of sections versus 54% using microwave and Chelex-100, 15%
with classical xylene-based extraction and 60% of sections using the kit.
Successful RNA extraction was observed, by beta-actin amplification, in
83.7% sections for samples treated by the thermal cycler and Chelex-100
method. Thermal cycler and Chelex-100 extraction of nucleic acid is
reliable, quick and inexpensive.
ARTICLES
Optimisation of DNA and RNA extraction from archival formalin-fixed tissue
University Surgical Unit, Southampton General Hospital, Southampton SO9 4YD, UK.
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