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Pressure-Assisted Protein Extraction: A Novel Method for Recovering Proteins from Archival Tissue for Proteomic Analysis

  1. Author:
    Fowler, C. B.
    Waybright, T. J.
    Veenstra, T. D.
    O'Leary, T. J.
    Mason, J. T.

  2. Author Address

    [Fowler, Carol B.; Mason, Jeffrey T.] Armed Forces Inst Pathol, Dept Biophys, Rockville, MD USA. [Fowler, Carol B.; O'Leary, Timothy J.] Vet Hlth Adm, Biomed Lab, Res & Dev Serv, Washington, DC USA. [Waybright, Timothy J.; Veenstra, Timothy D.] NCI, Lab Prote & Analyt Technol, Adv Technol Program, SAIC Frederick Inc, Frederick, MD USA.;Mason, JT (reprint author), Armed Forces Inst Pathol, Dept Biophys, Rockville, MD USA;jeffrey.mason.afip@gmail.com
    1. Year: 2012
    2. Date: Apr
  2. Journal: Journal of Proteome Research
    1. 11
    2. 4
    3. Pages: 2602-2608
  4. Type of Article: Article
  5. ISSN: 1535-3893
  1. Abstract:

    Formaldehyde-fixed, paraffin-embedded (FFPE) tissue repositories represent a valuable resource for the retrospective study of disease progression and response to therapy. However, the proteomic analysis of FFPE tissues has been hampered by formaldehyde-induced protein modifications, which reduce protein extraction efficiency and may lead to protein misidentification. Here, we demonstrate the use of heat augmented with high hydrostatic pressure (40,000 psi) as a novel method for the recovery of intact proteins from FFPE mouse liver. When FFPE mouse liver was extracted using heat and elevated pressure, there was a 4-fold increase in protein extraction efficiency, a 3-fold increase in the extraction of intact proteins, and up to a 30-fold increase in the number of nonredundant proteins identified by mass spectrometry, compared to matched tissue extracted with heat alone. More importantly, the number of nonredundant proteins identified in the FFPE tissue was nearly identical to that of matched fresh-frozen tissue.

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External Sources

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  2. DOI: 10.1021/pr201005t
  3. View record in Web of Science®
  4. WOS: 000302388100048

Library Notes

  1. Fiscal Year: FY2011-2012
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