Related Experiment Videos
Frameshift mutations at coding mononucleotide repeat microsatellites in endometrial carcinoma with microsatellite
L Catasus1, X Matias-Guiu, P Machin
1Department of Pathology, Hospital Santa Creu i Sant Pau, Autonomous University of Barcelona, Spain.
Cancer
|May 23, 2000
Summary
Microsatellite instability (MI) in endometrioid carcinoma frequently mutates the BAX gene. IGFRII mutations may drive tumor progression in metastatic endometrial cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Microsatellite instability (MI) is common in endometrioid carcinoma of the endometrium (EC).
- Genes with coding mononucleotide repeats, such as BAX, TGF-beta RII, IGFIIR, hMSH6, and hMSH3, are potential mutation targets in EC.
- Understanding these mutations is crucial for diagnosing and treating EC.
Purpose of the Study:
- To investigate the frequency and spectrum of mutations in key target genes in EC with MI.
- To determine the role of specific genes, like BAX and IGFRII, in EC tumor progression and metastasis.
Main Methods:
- DNA was extracted from tumor tissue and blood of 24 EC patients with MI and 10 without MI.
- Single-strand conformation polymorphism analysis and DNA sequencing were used to detect frameshift mutations.
- Analysis included patients with and without lymph node metastases.
Main Results:
- Frameshift mutations were most frequent in BAX (45.8%) among MI-positive tumors.
- Overall, 70.8% of MI-positive tumors exhibited mutations in at least one target gene.
- IGFRII mutations were more common in metastatic tumors than in primary tumors in patients with lymph node spread.
Conclusions:
- BAX is confirmed as a significant target gene in EC with MI.
- IGFRII frameshift mutations in lymph node metastases suggest a role in EC tumor progression.
- These findings highlight the importance of microsatellite instability in EC pathogenesis.