Related Experiment Video
Updated: Jun 19, 2026
08:48
High-throughput Physical Mapping of Chromosomes using Automated in situ Hybridization
Published on: June 28, 2012
High-throughput sequencing of microdissected chromosomal regions
Anja Weise1, Bernd Timmermann, Manfred Grabherr
1Institute of Human Genetics and Anthropology, Jena, Germany.
European Journal of Human Genetics : EJHG
|November 6, 2009
Summary
Cytogenetic enrichment, using chromosome microdissection and PCR amplification, enables next-generation sequencing without prior sequence knowledge. This method is ideal for studying unsequenced genomic regions and complex rearrangements.
Area of Science:
- Genomics
- Molecular Biology
- Cytogenetics
Background:
- Disease gene mapping relies on DNA sequencing, with massively parallel sequencing accelerating the process.
- Target region enrichment is crucial before sequencing, often using sequence-defined probe sets.
- Existing methods assume prior knowledge of sequences in the target region.
Purpose of the Study:
- To develop a DNA enrichment method for next-generation sequencing that does not rely on prior sequence information.
- To enable sequencing of previously uncharacterized or rearranged genomic regions.
Main Methods:
- Direct microdissection of target regions from metaphase chromosomes.
- Amplification of dissected DNA using degenerate oligonucleotide-primed PCR.
- High-throughput sequencing of amplified DNA.
Main Results:
- Sufficient high-quality DNA material was obtained from as few as six chromosomal fragments.
- Successful high-throughput sequencing was achieved using this method.
- The approach yielded sequence reads without prior sequence knowledge of the target region.
Conclusions:
- Cytogenetic enrichment followed by next-generation sequencing is a powerful technique.
- This method is independent of prior sequence knowledge, making it suitable for novel genomic regions.
- It is particularly useful for population-specific variations, tumor rearrangements, and unsequenced areas like centromeres.
