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Early onset prostate cancer has a significant genetic component
Ethan M Lange1, Claudia A Salinas, Kimberly A Zuhlke
1Department of Genetics, University of North Carolina, Chapel Hill, North Carolina, USA.
The Prostate
|May 4, 2011
Summary
Early onset prostate cancer (EO PCa) is linked to a stronger genetic basis. Focusing on EO PCa cases helps identify genetic variants associated with prostate cancer risk.
Area of Science:
- Genetics
- Oncology
- Epidemiology
Background:
- Prostate cancer (PCa) affects over 190,000 men annually, with approximately 10% diagnosed with early onset (EO) PCa (≤55 years).
- Early onset PCa suggests a potentially stronger underlying genetic etiology compared to later onset disease.
Purpose of the Study:
- To evaluate the association between previously identified single nucleotide polymorphisms (SNPs) and early onset prostate cancer (EO PCa).
- To determine if focusing on EO PCa cases can help identify PCa-associated genetic variants.
Main Methods:
- Genomic analysis of 754 Caucasian EO PCa cases (mean age 49.8 at diagnosis).
- Comparison with 2,713 Caucasian controls from Illumina's iControlDB database.
- Analysis of 1,163 prostate cancer cases diagnosed after 55 years from the Cancer Genetic Markers of Susceptibility Study (CGEMS).
Main Results:
- Thirteen of fourteen evaluated SNPs showed significant associations with EO PCa.
- EO PCa cases exhibited a significantly higher cumulative number of risk alleles compared to controls and older PCa cases.
- A higher frequency of risk alleles was observed in EO PCa cases compared to CGEMS cases for 11 of 13 associated SNPs, with five reaching statistical significance.
Conclusions:
- The study highlights the potential of investigating EO PCa to identify novel PCa-associated genetic variants.
- Focusing on the early onset subgroup can enhance the discovery of genetic factors contributing to prostate cancer susceptibility.
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