1. Cell-type–specific eQTL of primary melanocytes facilitates identification of melanoma susceptibility genes
- Author
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Zhang, Tongwu, Choi, Jiyeon, Kovacs, Michael A., Shi, Jianxin, Mai, Xu, Goldstein, Alisa M., Trower, Adam J., Bishop, D. Timothy, Iles, Mark M., Duffy, David L., Macgregor, Stuart, Amundadottir, Laufey T., Law, Matthew H., Loftus, Stacie K., Pavan, William J., Brown, Kevin M., Lee, Je, Brossard, M, Martin, Ng, Moses, Ek, Song, F, Barrett, Jh, Kumar, R, Easton, Df, Pharoah, Pdp, Swerdlow, Aj, Kypreou, Kp, Taylor, Jc, Harland, M, Randerson-Moor, J, Akslen, La, Andresen, Pa, Avril, Mf, Azizi, E, Bianchi Scarrà, G, Dȩbniak, T, Duffy, Dl, Elder, De, Fang, S, Friedman, E, Galan, P, Ghiorzo, P, Gillanders, Em, Goldstein, Am, Gruis, Na, Hansson, J, Helsing, P, Hočevar, M, Höiom, V, Ingvar, C, Kanetsky, Pa, Chen, Wv, Landi, Mt, Lang, J, Lathrop, Gm, Lubiński, J, Mackie, Rm, Mann, Gj, Molven, A, Montgomery, Gw, Novaković, S, Olsson, H, Puig, S, Puig-Butille, Ja, Wu, W, Qureshi, Aa, Radford-Smith, Gl, van der Stoep, N, van Doorn, R, Whiteman, Dc, Craig, Je, Schadendorf, D, Simms, La, Burdon, Kp, Nyholt, Dr, Pooley, Ka, Orr, N, Stratigos, Aj, Cust, Ae, Ward, Sv, Hayward, Nk, Han, J, Schulze, Hj, Dunning, Am, Bishop, Jan, Demenais, F, Amos, Ci, Macgregor, S, Iles, Mm, Barnabas, Bb, Bouffard, Gg, Brooks, Sy, Coleman, H, Dekhtyar, L, Guan, X, Ho, Sl, Legaspi, R, Maduro, Ql, Masiello, Ca, Mcdowell, Jc, Montemayor, C, Mullikin, Jc, Park, M, Riebow, Nl, Schandler, K, Schmidt, B, Sison, C, Smith, R, Stantripop, S, Thomas, Jw, Thomas, Pj, Vemulapalli, M, and Young, Ac.
- Subjects
0301 basic medicine ,Hemeproteins ,Linkage disequilibrium ,Quantitative Trait Loci ,Single-nucleotide polymorphism ,Genome-wide association study ,Biology ,Quantitative trait locus ,Melanocyte ,Polymorphism, Single Nucleotide ,Linkage Disequilibrium ,03 medical and health sciences ,Heme-Binding Proteins ,0302 clinical medicine ,Genetics ,medicine ,Basic Helix-Loop-Helix Transcription Factors ,Humans ,Genetic Predisposition to Disease ,Melanoma ,Genetics (clinical) ,Cells, Cultured ,Genetic association ,Research ,medicine.disease ,Repressor Proteins ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Expression quantitative trait loci ,Interferon Regulatory Factors ,Melanocytes ,Carrier Proteins - Abstract
Most expression quantitative trait locus (eQTL) studies to date have been performed in heterogeneous tissues as opposed to specific cell types. To better understand the cell-type–specific regulatory landscape of human melanocytes, which give rise to melanoma but account for cis-eQTL SNPs prior to linkage disequilibrium (LD) pruning and 4997 eGenes (FDR < 0.05). Melanocyte eQTLs differed considerably from those identified in the 44 GTEx tissue types, including skin. Over a third of melanocyte eGenes, including key genes in melanin synthesis pathways, were unique to melanocytes compared to those of GTEx skin tissues or TCGA melanomas. The melanocyte data set also identified trans-eQTLs, including those connecting a pigmentation-associated functional SNP with four genes, likely through cis-regulation of IRF4. Melanocyte eQTLs are enriched in cis-regulatory signatures found in melanocytes as well as in melanoma-associated variants identified through genome-wide association studies. Melanocyte eQTLs also colocalized with melanoma GWAS variants in five known loci. Finally, a transcriptome-wide association study using melanocyte eQTLs uncovered four novel susceptibility loci, where imputed expression levels of five genes (ZFP90, HEBP1, MSC, CBWD1, and RP11-383H13.1) were associated with melanoma at genome-wide significant P-values. Our data highlight the utility of lineage-specific eQTL resources for annotating GWAS findings, and present a robust database for genomic research of melanoma risk and melanocyte biology.
- Published
- 2018