Common sequence variants on 20q11.22 confer melanoma susceptibility
Kevin M Brown1, Stuart Macgregor, Grant W Montgomery
1Integrated Cancer Genomics Division, The Translational Genomics Research Institute, Phoenix, Arizona 85028, USA.
Nature Genetics
|May 20, 2008
Summary
Researchers identified a novel genetic risk locus on chromosome 20 associated with cutaneous melanoma. This finding, replicated across multiple samples, suggests a significant genetic component influencing melanoma development, particularly in early-onset cases.
Area of Science:
- Genetics
- Dermatology
- Cancer Research
Background:
- Cutaneous melanoma is a significant public health concern with a complex etiology involving genetic and environmental factors.
- Understanding the genetic underpinnings of melanoma is crucial for risk stratification and early detection strategies.
Purpose of the Study:
- To identify novel genetic variants associated with the risk of developing cutaneous melanoma.
- To validate initial findings through replication in independent sample sets.
Main Methods:
- A genome-wide association pooling study was performed to screen for potential melanoma risk loci.
- Identified loci were subsequently validated in independent cohorts comprising 2,019 melanoma cases and 2,105 controls.
- Statistical analysis included calculating odds ratios and assessing the significance of associations (P < 1 x 10(-15)).
Main Results:
- A novel melanoma risk locus on chromosome 20, marked by single nucleotide polymorphisms rs910873 and rs1885120, was identified.
- The identified variants showed strong replication in independent samples, with a combined P-value less than 1 x 10(-15).
- The per-allele odds ratio for the risk variants was 1.75, indicating a substantial increase in melanoma risk. Evidence suggested a stronger association in early-onset melanoma cases.
Conclusions:
- The study successfully identified a new genetic locus on chromosome 20 significantly associated with cutaneous melanoma risk.
- These findings contribute to the understanding of melanoma's genetic architecture and may inform future risk prediction models.
- The stronger association in early-onset cases warrants further investigation into the specific mechanisms driving genetic susceptibility in younger individuals.
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