Genetic Changes in Breast Cancer Related to Colorectal Cancer
Author Information
Author(s): A.M. Thompson, R.G. Morris, M. Wallace, A.H. Wyllie, C.M. Steel, D.C. Carter
Primary Institution: University Department of Surgery, The Royal Infirmary, Edinburgh
Hypothesis
Does loss of heterozygosity occur at loci involved in colorectal cancer in sporadic breast cancers?
Conclusion
The study found that loss of heterozygosity at the APC/MCC and DCC loci occurs in sporadic breast cancer, indicating shared genetic abnormalities with colorectal cancer.
Supporting Evidence
- 28% of informative patients exhibited loss of heterozygosity at the 5q21 locus.
- 31% of patients showed loss of heterozygosity at the 18q21 locus.
- 71% of patients had loss of heterozygosity at the 17p13 locus.
Takeaway
The study looked at breast cancer and found that some of the same genetic problems seen in colon cancer are also present in breast cancer.
Methodology
The study examined tumor tissue from 34 patients for loss of heterozygosity at specific loci and analyzed mRNA expression.
Limitations
The study did not find clear associations between allele losses and clinical features such as tumor size or stage.
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