Related Experiment Videos
[Comparative genomic hybridization in pathology. A new molecular cytogenetic method]
S Störkel1, R Simon, C Brinkschmidt
1Gerhard-Domagk-Institut für Pathologie der Westfälischen Wilhelms-Universität, Münster.
Der Pathologe
|May 1, 1996
Summary
Comparative genomic hybridization (CGH) identifies chromosomal aberrations by analyzing DNA hybridization. This cytogenetic technique aids in tumor and tissue genomic screening for genetic alterations.
Area of Science:
- Cytogenetics
- Molecular Genetics
- Genomics
Context:
- Comparative Genomic Hybridization (CGH) combines fluorescence microscopy and digital image analysis.
- It utilizes fluorescein-labeled test-DNA hybridized with reference-DNA on metaphase chromosomes.
- This method enables the detection of unbalanced chromosomal aberrations in a single step.
Purpose:
- To introduce Comparative Genomic Hybridization (CGH) as a novel cytogenetic technique.
- To explain the molecular genetic basis of CGH.
- To highlight its utility in identifying DNA gains or losses, potentially indicating oncogene amplifications or tumor suppressor gene losses.
Summary:
- CGH allows for the identification of all unbalanced chromosomal aberrations in test DNA through the hybridization of labeled test and reference DNA to metaphase chromosomes.
- Analysis reveals DNA gains or losses at chromosomal or subchromosomal levels, reflecting oncogene amplifications or tumor suppressor gene losses.
- The method is applicable to formalin-fixed, fresh-frozen tissues, and cells, making it a versatile tool for genomic screening.
Impact:
- CGH serves as an effective tool for pathologists and cytologists in genomic screening of tumors and altered tissues.
- It facilitates the identification of genetic alterations relevant to cancer and other genetic disorders.
- While currently for research, CGH is anticipated to become a routine diagnostic pathology method.