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. 2023 Jun 8;115(6):712-732.
doi: 10.1093/jnci/djad043.

Genome-wide analyses characterize shared heritability among cancers and identify novel cancer susceptibility regions

Sara Lindström  1   2 Lu Wang  3 Helian Feng  4 Arunabha Majumdar  5   6 Sijia Huo  4 James Macdonald  3 Tabitha Harrison  1 Constance Turman  7 Hongjie Chen  1 Nicholas Mancuso  8 Theo Bammler  3 Breast Cancer Association Consortium (BCAC)Steve Gallinger  9 Stephen B Gruber  10 Marc J Gunter  11 Loic Le Marchand  12 Victor Moreno  13   14   15   16 Kenneth Offit  17   18 Colorectal Transdisciplinary Study (CORECT), Colon Cancer Family Registry Study (CCFR), Genetics And Epidemiology Of Colorectal Cancer Consortium (GECCO)Immaculata De Vivo  7   19   20 Tracy A O'Mara  21 Amanda B Spurdle  21 Ian Tomlinson  22 Endometrial Cancer Association Consortium (ECAC)Rebecca Fitzgerald  23 Puya Gharahkhani  24 Ines Gockel  25 Janusz Jankowski  26   27 Stuart Macgregor  24 Johannes Schumacher  28 Jill Barnholtz-Sloan  29   30 Melissa L Bondy  31 Richard S Houlston  32 Robert B Jenkins  33 Beatrice Melin  34 Margaret Wrensch  35 Paul Brennan  11 David C Christiani  7   36 Mattias Johansson  11 James Mckay  11 Melinda C Aldrich  37 Christopher I Amos  38 Maria Teresa Landi  29 Adonina Tardon  39 International Lung Cancer Consortium (ILCCO)D Timothy Bishop  40 Florence Demenais  41 Alisa M Goldstein  29 Mark M Iles  40 Peter A Kanetsky  42 Matthew H Law  24   43 Ovarian Cancer Association Consortium (OCAC)Laufey T Amundadottir  29 Rachael Stolzenberg-Solomon  29 Brian M Wolpin  44 Pancreatic Cancer Cohort Consortium (Panscan)Alison Klein  45   46 Gloria Petersen  47 Harvey Risch  48 Pancreatic Cancer Case-Control Consortium (Panc4), The PRACTICAL ConsortiumStephen J Chanock  29 Mark P Purdue  29 Ghislaine Scelo  11 Paul Pharoah  49 Siddhartha Kar  50 Rayjean J Hung  51 Bogdan Pasaniuc  5   52   53 Peter Kraft  4   7
Affiliations

Genome-wide analyses characterize shared heritability among cancers and identify novel cancer susceptibility regions

Sara Lindström et al. J Natl Cancer Inst. .

Abstract

Background: The shared inherited genetic contribution to risk of different cancers is not fully known. In this study, we leverage results from 12 cancer genome-wide association studies (GWAS) to quantify pairwise genome-wide genetic correlations across cancers and identify novel cancer susceptibility loci.

Methods: We collected GWAS summary statistics for 12 solid cancers based on 376 759 participants with cancer and 532 864 participants without cancer of European ancestry. The included cancer types were breast, colorectal, endometrial, esophageal, glioma, head and neck, lung, melanoma, ovarian, pancreatic, prostate, and renal cancers. We conducted cross-cancer GWAS and transcriptome-wide association studies to discover novel cancer susceptibility loci. Finally, we assessed the extent of variant-specific pleiotropy among cancers at known and newly identified cancer susceptibility loci.

Results: We observed widespread but modest genome-wide genetic correlations across cancers. In cross-cancer GWAS and transcriptome-wide association studies, we identified 15 novel cancer susceptibility loci. Additionally, we identified multiple variants at 77 distinct loci with strong evidence of being associated with at least 2 cancer types by testing for pleiotropy at known cancer susceptibility loci.

Conclusions: Overall, these results suggest that some genetic risk variants are shared among cancers, though much of cancer heritability is cancer-specific and thus tissue-specific. The increase in statistical power associated with larger sample sizes in cross-disease analysis allows for the identification of novel susceptibility regions. Future studies incorporating data on multiple cancer types are likely to identify additional regions associated with the risk of multiple cancer types.

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Conflict of interest statement

BMW reports Grants from Celgene, Eli Lilly; Consulting for BioLineRx, Celgene, Grail; outside of the presented work. No other conflicts of interest exist.

Stephen J. Chanock and Harvey Risch, JNCI Associate Editors and coauthors on this manuscript, were not involved in the editorial review or decision to publish the article.

Figures

Figure 1.
Figure 1.
Pairwise genetic correlations between cancers. (A) Matrix of pairwise genetic correlations. (B) Genetic correlation network. Distance between nodes, edge shade, and edge thickness corresponds to genetic correlation magnitudes. Dashed lines indicate negative correlations. BRCA = breast cancer; CMM = cutaneous melanoma; CRC =colorectal cancer; ENDO = endometrial cancer; ESC = esophageal cancer; HNC = head and neck cancer; OVCA = ovarian cancer; PANC = pancreatic cancer; PRCA = prostate cancer; RCC = renal cancer (see Supplementary Table 1, available online for numerical values and corresponding P values). (Fruchterman and Reingold, 1991).
Figure 2.
Figure 2.
Cancer-specific association results for the lead single-nucleotide polymorphisms of 7 newly identified cancer susceptibility loci. The circles correspond to cancer-specific log(odds ratios), with color corresponding to direction of effect and size and shade corresponding to magnitude of effect. *Cancer-specific P < .05. **Cancer-specific P < .001. See Supplementary Table 5 (available online) for cancer-specific odds ratios and P values. NA denotes instances where the variant was not present in the corresponding cancer.
Figure 3.
Figure 3.
Regions in the genome with evidence of variant-specific pleiotropy. Colors correspond to regions with 4 sets of 3-cancer pleiotropy (blue), 1 combination of 3-cancer pleiotropy (light green), 9 combinations of pairwise cancer pleiotropy (red), 8 combinations of pairwise cancer pleiotropy (black), 3 combinations of pairwise cancer pleiotropy (pink), 2 combinations of pairwise cancer pleiotropy (dark green), and 1 combination of pairwise cancer pleiotropy (yellow). Full results from the pleiotropic analyses can be found in Supplementary Tables 10-12 (available online).

References

    1. Amos CI, Dennis J, Wang Z, et al.The OncoArray consortium: a network for understanding the genetic architecture of common cancers. Cancer Epidemiol Biomarkers Prev. 2017;26(1):126-135. - PMC - PubMed
    1. Jiang X, Finucane HK, Schumacher FR, et al.Shared heritability and functional enrichment across six solid cancers. Nat Commun. 2019;10(1):431. - PMC - PubMed
    1. Lindstrom S, Finucane H, Bulik-Sullivan B, et al.Quantifying the genetic correlation between multiple cancer types. Cancer Epidemiol Biomarkers Prev. 2017;26(9):1427-1435. - PMC - PubMed
    1. Kar SP, Beesley J, Amin Al Olama A, et al.; for the PRACTICAL Consortium. Genome-wide meta-analyses of breast, ovarian, and prostate cancer association studies identify multiple new susceptibility loci shared by at least two cancer types. Cancer Discov. 2016;6(9):1052-1067. - PMC - PubMed
    1. Fehringer G, Kraft P, Pharoah PD, et al.Cross-cancer genome-wide analysis of lung, ovary, breast, prostate, and colorectal cancer reveals novel pleiotropic associations. Cancer Res. 2016;76(17):5103-5114. - PMC - PubMed

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