Journal
PROTEOMICS
Volume 11, Issue 12, Pages 2555-2559Publisher
WILEY-BLACKWELL
DOI: 10.1002/pmic.201000809
Keywords
Biomedicine; Cancer; FFPE; Human samples; Protein expression; Western blotting
Funding
- Secretaria Xeral I+D+I, Xunta de Galicia, Spain [10CSA916023PR, IPP.08.07]
- Instituto de Salud Carlos III, Spain [CA09/00116, CA07/00232]
- Conselleria de Sanidade [PS09/24]
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Most of the archived pathological specimens in hospitals are kept as formalin-fixed paraffin-embedded tissues (FFPE) for long-term preservation. Up to now, these samples are only used for immunohistochemistry in a clinical routine as it is difficult to recover intact protein from these FFPE tissues. Here, we report a novel, short time-consuming and cost-effective method to extract full-length, non-degraded proteins from FFPE tissues. This procedure is combined with an effective and non-toxic deparaffinisation process and an extraction method based on antigen-retrieval, high concentration of SDS and high temperature. We have obtained enough intact protein to be detected by Western blotting analysis. This technique will allow utilising these stored FFPE tissues in several applications for protein analysis helping to advance the translational studies in cancer and other diseases.
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