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Related Experiment Videos

Laser-assisted cell microdissection using the PALM system.

Patrick Micke1, Arne Ostman, Joakim Lundeberg

  • 1Cancer Center Karolinska, Department of Oncology and Pathology, Karolinska Institute, Stockholm, Sweden.

Methods in Molecular Biology (Clifton, N.J.)
|July 21, 2005
PubMed
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Laser microdissection isolates RNA and DNA from specific cells for molecular analysis. This method enables gene expression and mutation studies from limited cell samples.

Area of Science:

  • Molecular Biology
  • Genomics
  • Cell Biology

Background:

  • Laser-assisted microdissection (LAM) allows isolation of specific cells from tissue sections.
  • Obtaining reliable molecular data from limited cell numbers (1-10,000) requires robust protocols due to fragile nucleic acids (DNA and RNA).

Purpose of the Study:

  • To describe the application of the PALM MicroBeam system for isolating RNA and DNA from cells in complex tissues.
  • To provide protocols for subsequent molecular analyses, including gene expression and genomic mutation detection.

Main Methods:

  • Utilizing the PALM Robot MicroBeam system for laser microdissection and cell retrieval.
  • Implementing protocols for RNA isolation from 500-1000 cells, including cDNA synthesis for PCR and gene array analysis.
  • Applying a protocol for genomic analysis of p53 mutations from single cells.

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Main Results:

  • Successful isolation of RNA and DNA from specific cell populations using laser microdissection.
  • Demonstrated protocols for cDNA synthesis, enabling PCR and gene array analysis from limited RNA samples.
  • Established a protocol for genomic analysis of p53 mutations in single cells.

Conclusions:

  • The PALM MicroBeam system provides a robust method for isolating nucleic acids from specific cells for molecular analysis.
  • Protocols are presented for successful RNA and DNA analysis from limited cell numbers, supporting gene expression and genomic studies.
  • This approach facilitates downstream molecular experiments, including validation, from precisely selected cells.