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Chromosome Microdissection on Semi-Archived Material.

Ahmed B Hamid Al-Rikabi1, Marcelo de Bello Cioffi1,2, Thomas Liehr1

  • 1Jena University Hospital, Institute of Human Genetics, Friedrich Schiller University, Jena, Germany.

Cytometry. Part a : the Journal of the International Society for Analytical Cytology
|September 19, 2019
PubMed
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Glass needle-based chromosome microdissection (midi) can now use semi-archived samples. This adaptation allows for longer storage, enabling broader application in molecular research and diagnostics.

Area of Science:

  • Genetics
  • Molecular Biology
  • Cytometry

Background:

  • Chromosome microdissection (midi) is a standard technique for isolating DNA.
  • Current midi methods require timely chromosome preparation, limiting sample accessibility.
  • The minimal DNA yield necessitates amplification for downstream applications.

Purpose of the Study:

  • To adapt the standard midi procedure for use with semi-archived chromosome preparations.
  • To overcome the time-sensitive limitation of chromosome preparation for midi.
  • To enable the creation of chromosome-specific DNA libraries from stored samples.

Main Methods:

  • A simple adaptation of the standard glass needle-based chromosome microdissection (midi) technique was developed.
  • Semi-archived chromosome preparations were stored at -20°C for extended periods.
Keywords:
DNAair-drying methodchromosomeglass-needle-based chromosome microdissection (midi)molecular cytogeneticssemi-archived material

Related Experiment Videos

  • DNA libraries were generated from stored chromosome spreads and analyzed.

    • Main Results:

    • High-quality DNA libraries were successfully obtained from chromosome spreads stored for up to 6 months.
    • The adapted midi technique was validated on diverse species including human, fish, snake, lampbrush, and insect.
    • Quality of the isolated DNA libraries was confirmed by gel electrophoresis and reverse fluorescence in situ hybridization.

    Conclusions:

    • The adapted midi procedure allows for the use of semi-archived chromosome material, overcoming previous time constraints.
    • This modification expands the utility of midi for generating chromosome- or chromosome-region-specific DNA libraries.
    • The technique facilitates sample sharing between primary and specialized reference laboratories.