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PCR analysis of microsatellite instability
1CRC Department of Medical Oncology, Beatson Laboratories, University of Glasgow, Glasgow, UK.
Methods in Molecular Medicine
|March 5, 2011
Summary
Microsatellite instability, characterized by changes in DNA repeat sequences, is a key feature observed in various cancers. This genetic instability also plays a role in certain inherited diseases.
Area of Science:
- Genetics
- Molecular Biology
- Oncology
Background:
- Microsatellites are repetitive DNA sequences abundant in the human genome.
- Their polymorphic nature makes them valuable genetic markers.
- Commonly found as CA/GT repeats, they are estimated to occur around 100,000 times in the human genome.
Purpose of the Study:
- To review the phenomenon of microsatellite instability.
- To highlight its association with various tumor types.
- To discuss its role in certain genetic disorders.
Main Methods:
- Literature review of studies on microsatellite instability.
- Analysis of findings related to microsatellite sequences in tumors and diseases.
Main Results:
- Microsatellite instability, involving expansion or contraction of repeat sequences, was first reported in colorectal tumors.
- This instability has since been identified in lung, breast, stomach, endometrium, and bladder cancers.
- Instability in trinucleotide repeats is linked to diseases like Fragile X syndrome, myotonic dystrophy, and Huntington's Disease.
Conclusions:
- Microsatellite instability is a significant genetic alteration observed across a spectrum of cancers.
- The study underscores the broad implications of microsatellite alterations in both oncogenesis and inherited neurological disorders.
