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Tissue microdissection.

Heidi S Erickson1, John W Gillespie, Michael R Emmert-Buck

  • 1National Institutes of Health, Bethesda, Maryland, USA.

Methods in Molecular Biology (Clifton, N.J.)
|March 29, 2008
PubMed
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Tissue microdissection enables isolating pure cells from complex tissues. Snap-freezing preserves biomolecular quality better than fixation and embedding for analyses like proteomic studies.

Area of Science:

  • Histopathology
  • Molecular Biology
  • Biotechnology

Background:

  • Heterogeneous histological sections pose challenges for isolating pure cell populations.
  • Existing manual and laser-based tissue microdissection tools have varying strengths and weaknesses.
  • Biomolecular analysis quality is influenced by cell procurement methods and upstream tissue processing.

Purpose of the Study:

  • To outline protocols for tissue handling, processing, sectioning, and microdissection.
  • To compare the impact of different tissue preparation methods on biomolecular recovery.
  • To provide guidance based on experience at the National Cancer Institute's Pathogenetics Unit.

Main Methods:

  • Tissue preparation via snap-freezing or fixation/embedding.

Related Experiment Videos

  • Microdissection using manual or laser-based tools.
  • Protocols for tissue handling, section preparation, and cell procurement.

    • Main Results:

    • Snap-freezing yields higher quality tissue for proteomic analyses (e.g., 2D-PAGE) compared to fixation and embedding.
    • Fixed and embedded tissues provide lower quantity and quality biomolecules but are suitable for specific analyses.
    • The choice of tissue preparation significantly impacts the success of subsequent biomolecular studies.

    Conclusions:

    • Effective tissue microdissection requires careful consideration of both procurement methods and upstream tissue processing.
    • Snap-freezing is generally superior for preserving biomolecular integrity for advanced analyses.
    • Standardized protocols are crucial for reliable biomolecular analysis from microdissected tissues.