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Microsatellite instability in endometrial carcinoma
R T Burks1, T D Kessis, K R Cho
1Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.
Oncogene
|April 1, 1994
Summary
Microsatellite instability (MI), a DNA alteration, is frequently found in endometrial cancers. This genetic change, linked to replication errors (RER), may play a key role in endometrial tumor development.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Microsatellite instability (MI) is a known genetic alteration in colorectal carcinomas.
- MI is often attributed to replication errors (RER), which can occur sporadically or in hereditary non-polyposis colorectal cancer (HNPCC).
- Endometrial carcinoma is also frequently associated with HNPCC.
Purpose of the Study:
- To investigate the presence and patterns of microsatellite instability (MI) in endometrial carcinoma.
- To determine if MI is a significant genetic feature in endometrial neoplasms.
Main Methods:
- Analysis of 30 endometrial carcinoma cases.
- Detection of microsatellite DNA sequence allele size shifts to identify MI.
- Characterization of mutation patterns (Type I and Type II).
Main Results:
- Microsatellite instability (MI) was detected in 7 out of 30 (23%) endometrial carcinoma cases.
- Four cases exhibited both Type I (large shifts) and Type II (small shifts) mutation patterns.
- Three cases demonstrated only Type I mutations.
Conclusions:
- Microsatellite instability (MI) is a frequent occurrence in endometrial cancers.
- MI represents a significant genetic alteration that may be important in the pathogenesis of endometrial carcinoma.