Related Experiment Videos
Multiplex-FISH for pre- and postnatal diagnostic applications
S Uhrig1, S Schuffenhauer, C Fauth
1Institut für Anthropologie und Humangenetik, LMU München, D-80336 München, Germany.
American Journal of Human Genetics
|July 27, 1999
Summary
Multiplex-FISH (M-FISH) offers advanced chromosomal analysis, identifying abnormalities missed by standard G-banding. This multicolor technique provides comprehensive cytogenetic information for diagnostics within 24 hours.
Area of Science:
- Cytogenetics
- Molecular Biology
- Genetics
Background:
- Giemsa banding (G-banding) has been the standard for chromosomal analysis for over 30 years.
- G-banding alone often fails to fully characterize marker chromosomes and structural abnormalities.
Purpose of the Study:
- To introduce and evaluate multiplex-FISH (M-FISH) as a superior diagnostic tool for chromosomal analysis.
- To demonstrate M-FISH's ability to identify cryptic and complex chromosomal abnormalities.
Main Methods:
- Multiplex-FISH (M-FISH) utilizes 24 distinct colors to visualize all 22 autosomes and 2 sex chromosomes.
- M-FISH identifies euchromatin in marker chromosomes and characterizes translocations and insertions.
- Comparative genomic hybridization and chromosome-specific multicolor bar codes were used to discern deleted or duplicated regions.
Main Results:
- M-FISH successfully identified marker chromosomes and structural abnormalities that were not decipherable by G-banding.
- The technique revealed cryptic abnormalities in patients with a normal G-karyotype.
- M-FISH provided rapid diagnostic results, obtainable within 24 hours.
Conclusions:
- M-FISH is a reliable and powerful tool for pre- and postnatal diagnostic applications.
- Combining M-FISH with G-banding provides maximum cytogenetic information.
- M-FISH enhances the detection of complex chromosomal rearrangements.