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Intronic polymorphisms in TP53 indicate lymph node metastasis in breast cancer.
Roman Hrstka1, Michal Beranek, Katerina Klocova
1Department of Oncological and Experimental Pathology, Masaryk Memorial Cancer Institute, 656 53 Brno, Czech Republic.
Oncology Reports
|September 30, 2009
Summary
Genetic variations in the TP53 gene (Tumor Protein 53) did not predict breast cancer development or patient outcomes. However, specific TP53 polymorphisms correlated with lymph node metastasis, suggesting potential as a biomarker.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- The TP53 pathway is crucial in tumor suppression, influencing cancer development and treatment response.
- Genetic polymorphisms in TP53 are being investigated as potential biomarkers for various cancers.
Purpose of the Study:
- To evaluate the association of common TP53 gene polymorphisms (R72P, PIN3 Ins 16bp, PIN6 G13494A) with breast cancer risk, prognosis, and clinical characteristics.
- To determine the utility of these polymorphisms as predictive biomarkers in breast cancer.
Main Methods:
- Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to analyze TP53 polymorphisms.
- A cohort of 117 breast cancer tissues and 108 control specimens were genotyped.
Main Results:
- No significant differences in the incidence of R72P, PIN3 Ins 16bp, and PIN6 G13494A polymorphisms were found between breast cancer patients and controls.
- These polymorphisms showed no statistically significant association with overall patient outcomes.
- A positive correlation was observed between lymph node metastases and both PIN3 Ins 16bp and PIN6 G13494A polymorphisms.
Conclusions:
- Intronic TP53 variants, specifically PIN3 Ins 16bp and PIN6 G13494A, may serve as predictive biomarkers for an aggressive breast cancer phenotype.
- These variants could be particularly useful in identifying high-risk patients within clinical stage I breast cancer.
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