Cited by 208BRCA gene mutations in cancerDNA Repair MechanismsGenetic factors in colorectal cancer

RAD50 and NBS1 are breast cancer susceptibility genes associated with genomic instability

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Heikkinen, K.·2005·Carcinogenesis

Abstract

The Mre11 complex, composed of RAD50, NBS1 and MRE11, has an essential role in the maintenance of genomic integrity and preventing cells from malignancy. Here we report the association of three Mre11 complex mutations with hereditary breast cancer susceptibility, studied by using a case-control design with 317 consecutive, newly diagnosed Northern Finnish breast cancer patients and 1000 geographically matched healthy controls (P = 0.0004). RAD50 687delT displayed significantly elevated frequency in the studied patients (8 out of 317, OR 4.3, 95% CI 1.5-12.5, P= 0.008), which indicates that it is a relatively common low-penetrance risk allele in this cohort. Haplotype analysis and the screening of altogether 512 additional breast cancer cases from Sweden, Norway and Iceland suggest that RAD50 687delT is a Finnish founder mutation, not present in the other Nordic cohorts. The RAD50 IVS3-1G>A splicing mutation leading to translational frameshift was observed in one patient, and the NBS1 Leu150Phe missense mutation affecting a conserved residue in the functionally important BRCA1 carboxy-terminal (BRCT) domain in two patients, both being absent from 1000 controls. Microsatellite marker analysis showed that loss of the wild-type allele was not involved in the tumorigenesis in any of the studied mutation carriers, but they all showed increased genomic instability assessed by cytogenetic analysis of peripheral blood T-lymphocytes (P = 0.006). In particular, the total number of chromosomal rearrangements was significantly increased (P = 0.002). These findings suggest an effect for RAD50 and NBS1 haploinsufficiency on genomic integrity and susceptibility to cancer.

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Crossref · 10.1093/carcin/bgi360

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  • CHEK2, ATM, NBS1, RAD50, TOPBP1, and RAD51C are mutated in breast cancer patients.

    “Correspondingly, these and other genes functioning in the DNA damage response, such as CHEK2, ATM, NBS1, RAD50, TOPBP1 and RAD51C, are mutated in breast cancer patients [12–21].”

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Authors
Heikkinen, K.
Affiliations
Oulu University Hospital (FI)
Corresponding author
Heikkinen, K.
Venue
Carcinogenesis
Published
2005-12-12
Volume
27
Issue
8
Pages
1593-1599
ISSN
  • 0143-3334 (ISSN-L)
  • 1460-2180
OpenAlex
W2137466745
Cited by
208
References
31
Citations by year
2025: 7 · 2024: 6 · 2023: 12 · 2022: 8 · 2021: 10 · 2020: 11 · 2019: 5 · 2018: 10 · 2017: 12 · 2016: 10 · 2015: 11 · 2014: 12 · 2013: 18 · 2012: 8
FWCI
5.77
Type
journal article
Language
en
Open access
Locations
  • Carcinogenesis (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
  • Hirsla (Landspítali University Hospital) (submittedVersion)
Funders
  • National Cancer Institute (R13CA162528, P30CA008748)
  • National Institute of General Medical Sciences (R01GM056888)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
Keywords
RAD50, NBS1, Mre11 complex, hereditary breast cancer, cancer susceptibility genes, genomic instability, founder mutation, haploinsufficiency, BRCT domain, chromosomal rearrangements, Finnish population
MeSH terms
Adult, Aged, Aged, 80 and over, Breast Neoplasms, DNA-Binding Proteins, Female, Genotype, Haplotypes, Humans, Male, Mass Screening, Middle Aged, Mutation, Nuclear Proteins, Pedigree, T-Lymphocytes, Gene Rearrangement, Cohort Studies, Case-Control Studies, Acid Anhydride Hydrolases, Cell Cycle Proteins, Microsatellite Repeats, Genetic Predisposition to Disease, Cytogenetic Analysis, Genomic Instability, DNA Repair Enzymes

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