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Updated: Jul 6, 2026
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Technical Demonstration of Whole Genome Array Comparative Genomic Hybridization
Published on: August 5, 2008
High-resolution array comparative genomic hybridization of single micrometastatic tumor cells
Christine Fuhrmann1, Oleg Schmidt-Kittler, Nikolas H Stoecklein
1Division of Oncogenomics, Department of Pathology, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
Nucleic Acids Research
|March 18, 2008
Summary
This study introduces a new method for analyzing the genomes of single cancer cells, enabling the detection of DNA copy number changes. This breakthrough allows for the identification of genomic alterations in rare cancer cells, crucial for understanding tumor progression and therapy resistance.
Area of Science:
- Genomics
- Cancer Biology
- Molecular Diagnostics
Background:
- A small subset of cancer cells drives tumor progression and therapy resistance.
- Current high-resolution genome analysis is limited to pooled DNA, obscuring single-cell genomic characteristics.
Purpose of the Study:
- To develop a protocol for array comparative genomic hybridization (array CGH) for single-cell DNA analysis.
- To enable the detection of DNA copy number changes in individual cells.
Main Methods:
- Combined PCR-based whole genome amplification with purified BAC clone arrays.
- Applied array CGH to single leukocytes, single cell line cells, and single micrometastatic cancer cells.
Main Results:
- Accurately determined chromosomal changes in single leukocytes and complex genomic imbalances in single cell line cells.
- Identified aberrant regions as small as 1-2 Mb in single T47D cells.
- Confirmed amplifications as small as 4.4 and 5 Mb in single micrometastatic cancer cells from breast cancer patients.
Conclusions:
- High-resolution genome analysis of single metastatic precursor cells is now feasible.
- This method facilitates the identification of novel therapeutic targets by analyzing the genomes of rare, critical cancer cells.
