Beyond BRCA: new hereditary breast cancer susceptibility genes
P Economopoulou1, G Dimitriadis1, A Psyrri1
1Oncology Unit, 2nd Department of Internal Medicine, Attikon University Hospital, National Kapodistrian University of Athens, Greece.
Abstract:
Approximately 5-10% of breast cancer cases might be inheritable, up to 30% of which are due to BRCA1/2 mutations. During the past few years and thanks to technology evolution, we have been witnesses of an intensive search of additional genes with similar characteristics, under the premise that successful gene discovery will provide substantial opportunities for primary and secondary prevention of breast cancer. Consequently, new genes have emerged as breast cancer susceptibility genes, including rare germline mutations in high penetrant genes, such as TP53 and PTEN, and more frequent mutations in moderate penetrant genes, such as CHEK2, ATM and PALB2. This review will summarize current data on new findings in breast cancer susceptibility genes.
Insights
Genetic research is identifying new breast cancer susceptibility genes beyond BRCA1/2. Discovering these genes offers new avenues for breast cancer prevention strategies.
Area of Science:
- Genetics
- Oncology
- Molecular Biology
Background:
- Inherited factors contribute to 5-10% of breast cancer cases.
- BRCA1/2 mutations account for up to 30% of hereditary breast cancers.
- Technological advancements drive the search for additional breast cancer susceptibility genes.
Purpose of the Study:
- To review current findings on newly identified breast cancer susceptibility genes.
- To highlight the importance of gene discovery for cancer prevention.
Main Methods:
- Literature review of recent studies on breast cancer genetics.
- Analysis of emerging data on gene mutations and their penetrance.
Main Results:
- Identification of high-penetrance genes (TP53, PTEN) with rare germline mutations.
- Identification of moderate-penetrance genes (CHEK2, ATM, PALB2) with more frequent mutations.
- Emergence of new genes contributing to hereditary breast cancer risk.
Conclusions:
- Several new genes are recognized as breast cancer susceptibility factors.
- Understanding these genes enhances opportunities for primary and secondary breast cancer prevention.
- Continued research into genetic susceptibility is crucial for advancing cancer care.
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