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Germline ATBF1 mutations and prostate cancer risk
Junyan Xu1, Jurga Sauvageot, Charles M Ewing
1Center for Human Genomics, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.
Background:
ATBF1 has been recently identified as a candidate prostate tumor suppressor gene. In addition to more unique mutations, two somatic mutations (shortening of a polypyrimidine tract [Poly(T)n] and a deletion beginning at codon 3381 (3381del)) were each observed in multiple prostate cancer samples and both appear to have an impact on ATBF1 gene function and expression.
Methods:
We assayed two recurrent sequence variants in germline DNA from prostate cancer cases and controls, and examined whether carriers of these variants are at increased risk for prostate cancer.
Results:
We found Poly(T)n variants in both normal and matched tumor DNA samples from multiple patients, indicating a germline origin in each case. Genotyping germline DNA samples indicated that 3381del was significantly associated with prostate cancer risk among sporadic cases (P = 0.03), but not among men with hereditary disease.
Conclusions:
Our study indicates that the germline 3381del allele may influence prostate cancer susceptibility.
Insights
The germline 3381del allele of the ATBF1 gene may increase prostate cancer risk. This finding suggests ATBF1 may be a prostate tumor suppressor gene, influencing susceptibility in sporadic cases.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- ATBF1 is a candidate prostate tumor suppressor gene.
- Two recurrent somatic mutations, Poly(T)n and 3381del, impact ATBF1 function and expression in prostate cancer.
- These mutations were observed in multiple prostate cancer samples.
Purpose of the Study:
- To investigate the germline origin and prostate cancer risk associated with two recurrent ATBF1 sequence variants.
- To determine if carriers of these variants have an increased risk for prostate cancer.
Main Methods:
- Assayed two recurrent sequence variants (Poly(T)n and 3381del) in germline DNA from prostate cancer cases and controls.
- Genotyped germline DNA samples to assess the association with prostate cancer risk.
Main Results:
- Poly(T)n variants were found in both normal and tumor DNA, confirming germline origin.
- The 3381del variant was significantly associated with increased prostate cancer risk in sporadic cases (P = 0.03).
- No significant association was found between 3381del and prostate cancer risk in hereditary cases.
Conclusions:
- The germline 3381del allele of ATBF1 may influence prostate cancer susceptibility.
- ATBF1 germline variants could play a role in the development of prostate cancer.
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