Atlas of prostate cancer heritability in European and African-American men pinpoints tissue-specific regulation
- PMID: 27052111
- PMCID: PMC4829663
- DOI: 10.1038/ncomms10979
Atlas of prostate cancer heritability in European and African-American men pinpoints tissue-specific regulation
Abstract
Although genome-wide association studies have identified over 100 risk loci that explain ∼33% of familial risk for prostate cancer (PrCa), their functional effects on risk remain largely unknown. Here we use genotype data from 59,089 men of European and African American ancestries combined with cell-type-specific epigenetic data to build a genomic atlas of single-nucleotide polymorphism (SNP) heritability in PrCa. We find significant differences in heritability between variants in prostate-relevant epigenetic marks defined in normal versus tumour tissue as well as between tissue and cell lines. The majority of SNP heritability lies in regions marked by H3k27 acetylation in prostate adenoc7arcinoma cell line (LNCaP) or by DNaseI hypersensitive sites in cancer cell lines. We find a high degree of similarity between European and African American ancestries suggesting a similar genetic architecture from common variation underlying PrCa risk. Our findings showcase the power of integrating functional annotation with genetic data to understand the genetic basis of PrCa.
Figures
is labelled by the dashed lines. Error bars show analytical standard error of estimate.
equal to %SNPs after accounting for all tests. The two most significant annotations in each class are shown with triangle/cross, respectively, and labelled in bottom right (see Supplementary Data for all annotations).
and %SNP, with bold representing significance after correcting for nine tests. The observed trend is LNCAP>PREC>RWPE1: (a)
in LNCaP DHS was nominally significantly higher than PrEC (P=0.01); and
in LNCaP and PrEC was significantly higher than RWPE1 (b,c; P=1.5 × 10−9, P=1.2 × 10−5, respectively). All P values computed by Z-test using
estimate and analytical standard error.
/ %SNP for enhancers (left) and super enhancers (right) from a given cell type tested marginally. Red indicates significant difference from 1.0 (no enrichment) after accounting for 49 tests. Enhancer LNCAP is most significant, with other cancers also appearing significant and non-cancer tissues least significant. Error bars show analytical s.e. of estimate.
under the null of no enrichment. Volume of each shaded pie-chart slice represents the actual
inferred by the model. Slices extending outside/inside the middle pie correspond to enrichment/depletion in SNP heritability, as indicated by the dotted lines. Colour coding is consistent across all subpanels. * (**) denotes significant deviation at P<0.05 (P<0.05/15) of fraction of SNP heritability (
from null model of
by Z-test; see Supplementary Table 6 for P values).References
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