Abstract
Genome-wide association studies have reported 11 regions conferring risk of high-grade serous epithelial ovarian cancer (HGSOC). Expression quantitative trait locus (eQTL) analyses can identify candidate susceptibility genes at risk loci. Here we evaluate cis-eQTL associations at 47 regions associated with HGSOC risk (P≤10-5). For three cis-eQTL associations (P<1.4 × 10-3, FDR<0.05) at 1p36 (CDC42), 1p34 (CDCA8) and 2q31 (HOXD9), we evaluate the functional role of each candidate by perturbing expression of each gene in HGSOC precursor cells. Overexpression of HOXD9 increases anchorage-independent growth, shortens population-doubling time and reduces contact inhibition. Chromosome conformation capture identifies an interaction between rs2857532 and the HOXD9 promoter, suggesting this SNP is a leading causal variant. Transcriptomic profiling after HOXD9 overexpression reveals enrichment of HGSOC risk variants within HOXD9 target genes (P=6 × 10-10 for risk variants (P<10-4) within 10 kb of a HOXD9 target gene in ovarian cells), suggesting a broader role for this network in genetic susceptibility to HGSOC.
Original language | English |
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Article number | 8234 |
Journal | Nature Communications |
Volume | 6 |
Number of pages | 14 |
ISSN | 2041-1723 |
DOIs | |
Publication status | Published - 22 Sept 2015 |
Keywords
- Cell Line, Tumor
- Female
- Gene Expression Regulation, Neoplastic
- Genetic Association Studies
- Genetic Predisposition to Disease
- Homeodomain Proteins
- Humans
- Neoplasm Proteins
- Neoplasms, Glandular and Epithelial
- Nuchal Cord
- Ovarian Neoplasms
- Protein Binding
- Quantitative Trait Loci