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Related Experiment Videos

Laser capture microdissection and single-cell RT-PCR without RNA purification.

Kathryne Melissa Keays1, Gregory P Owens, Alanna M Ritchie

  • 1Department of Neurology, University of Colorado Health Sciences Center, 4200 East 9th Avenue, Mail Stop B182, Denver, CO 80262, United States.

Journal of Immunological Methods
|August 9, 2005
PubMed
Summary

Researchers developed a new method to identify specific antibodies (immunoglobulin G) in individual immune cells within the central nervous system (CNS). This technique aids in understanding immune responses in neurological diseases with unknown causes.

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Area of Science:

  • Neurology
  • Immunology
  • Molecular Biology

Background:

  • Chronic central nervous system (CNS) infections involve increased immunoglobulin G (IgG) synthesis against the causative agent.
  • The specific targets of humoral immune responses in inflammatory CNS diseases like multiple sclerosis and sarcoidosis remain unclear.

Purpose of the Study:

  • To identify specific immunoglobulin G (IgG) molecules produced by individual CD38(+) plasma cells in human brain tissue.
  • To develop and refine techniques for analyzing gene expression in single cells from complex tissues.

Main Methods:

  • Combined laser capture microdissection (LCM) with single-cell reverse-transcription polymerase chain reaction (RT-PCR).
  • Developed two methods for reverse-transcription (RT) of unpurified total RNA from single-cell lysates.

Related Experiment Videos

  • Optimized an in situ RT method on detergent-solubilized cells followed by nested PCR to identify heavy and light chain sequences.

    • Main Results:

    • Successfully identified heavy and light chain sequences of immunoglobulin G (IgG) in two-thirds of individually isolated plasma cells.
    • The in situ RT method proved more successful than freeze-thaw techniques for RNA analysis.
    • Demonstrated the feasibility of analyzing gene expression products in single cells from complex tissues.

    Conclusions:

    • The developed techniques streamline the identification of gene expression products in single cells.
    • This approach has significant potential for identifying specific immunoglobulin G (IgG) targets in CNS inflammatory diseases of unknown etiology.
    • Advances understanding of humoral immunity in neurological disorders.