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Meta-Analysis
. 2023 Jul;84(1):127-137.
doi: 10.1016/j.eururo.2023.04.020. Epub 2023 May 19.

Genome-wide Association Study of Bladder Cancer Reveals New Biological and Translational Insights

Stella Koutros  1 Lambertus A Kiemeney  2 Parichoy Pal Choudhury  3 Roger L Milne  4 Evangelina Lopez de Maturana  5 Yuanqing Ye  6 Vijai Joseph  7 Oscar Florez-Vargas  8 Lars Dyrskjøt  9 Jonine Figueroa  10 Diptavo Dutta  11 Graham G Giles  4 Michelle A T Hildebrandt  12 Kenneth Offit  7 Manolis Kogevinas  13 Elisabete Weiderpass  14 Marjorie L McCullough  15 Neal D Freedman  16 Demetrius Albanes  16 Charles Kooperberg  17 Victoria K Cortessis  18 Margaret R Karagas  19 Alison Johnson  20 Molly R Schwenn  21 Dalsu Baris  22 Helena Furberg  7 Dean F Bajorin  7 Olivier Cussenot  23 Geraldine Cancel-Tassin  24 Simone Benhamou  25 Peter Kraft  26 Stefano Porru  27 Angela Carta  27 Timothy Bishop  28 Melissa C Southey  29 Giuseppe Matullo  30 Tony Fletcher  31 Rajiv Kumar  32 Jack A Taylor  33 Philippe Lamy  34 Frederik Prip  34 Mark Kalisz  35 Stephanie J Weinstein  16 Jan G Hengstler  36 Silvia Selinski  36 Mark Harland  28 Mark Teo  28 Anne E Kiltie  37 Adonina Tardón  38 Consol Serra  39 Alfredo Carrato  40 Reina García-Closas  41 Josep Lloreta  42 Alan Schned  43 Petra Lenz  44 Elio Riboli  45 Paul Brennan  14 Anne Tjønneland  46 Thomas Otto  47 Daniel Ovsiannikov  48 Frank Volkert  49 Sita H Vermeulen  2 Katja K Aben  50 Tessel E Galesloot  2 Constance Turman  26 Immaculata De Vivo  51 Edward Giovannucci  26 David J Hunter  52 Chancellor Hohensee  17 Rebecca Hunt  17 Alpa V Patel  15 Wen-Yi Huang  16 Gudmar Thorleifsson  53 Manuela Gago-Dominguez  54 Pilar Amiano  55 Klaus Golka  36 Mariana C Stern  56 UROMOL ConsortiumWusheng Yan  8 Jia Liu  44 Shengchao Alfred Li  44 Shilpa Katta  44 Amy Hutchinson  44 Belynda Hicks  44 William A Wheeler  57 Mark P Purdue  22 Katherine A McGlynn  16 Cari M Kitahara  58 Christopher A Haiman  59 Mark H Greene  60 Thorunn Rafnar  53 Nilanjan Chatterjee  61 Stephen J Chanock  62 Xifeng Wu  6 Francisco X Real  63 Debra T Silverman  22 Montserrat Garcia-Closas  64 Kari Stefansson  53 Ludmila Prokunina-Olsson  8 Núria Malats  5 Nathaniel Rothman  22
Affiliations
Meta-Analysis

Genome-wide Association Study of Bladder Cancer Reveals New Biological and Translational Insights

Stella Koutros et al. Eur Urol. 2023 Jul.

Abstract

Background: Genomic regions identified by genome-wide association studies (GWAS) for bladder cancer risk provide new insights into etiology.

Objective: To identify new susceptibility variants for bladder cancer in a meta-analysis of new and existing genome-wide genotype data.

Design, setting, and participants: Data from 32 studies that includes 13,790 bladder cancer cases and 343,502 controls of European ancestry were used for meta-analysis.

Outcome measurements and statistical analyses: Log-additive associations of genetic variants were assessed using logistic regression models. A fixed-effects model was used for meta-analysis of the results. Stratified analyses were conducted to evaluate effect modification by sex and smoking status. A polygenic risk score (PRS) was generated on the basis of known and novel susceptibility variants and tested for interaction with smoking.

Results and limitations: Multiple novel bladder cancer susceptibility loci (6p.22.3, 7q36.3, 8q21.13, 9p21.3, 10q22.1, 19q13.33) as well as improved signals in three known regions (4p16.3, 5p15.33, 11p15.5) were identified, bringing the number of independent markers at genome-wide significance (p < 5 × 10-8) to 24. The 4p16.3 (FGFR3/TACC3) locus was associated with a stronger risk for women than for men (p-interaction = 0.002). Bladder cancer risk was increased by interactions between smoking status and genetic variants at 8p22 (NAT2; multiplicative p value for interaction [pM-I] = 0.004), 8q21.13 (PAG1; pM-I = 0.01), and 9p21.3 (LOC107987026/MTAP/CDKN2A; pM-I = 0.02). The PRS based on the 24 independent GWAS markers (odds ratio per standard deviation increase 1.49, 95% confidence interval 1.44-1.53), which also showed comparable results in two prospective cohorts (UK Biobank, PLCO trial), revealed an approximately fourfold difference in the lifetime risk of bladder cancer according to the PRS (e.g., 1st vs 10th decile) for both smokers and nonsmokers.

Conclusions: We report novel loci associated with risk of bladder cancer that provide clues to its biological underpinnings. Using 24 independent markers, we constructed a PRS to stratify lifetime risk. The PRS combined with smoking history, and other established risk factors, has the potential to inform future screening efforts for bladder cancer.

Patient summary: We identified new genetic markers that provide biological insights into the genetic causes of bladder cancer. These genetic risk factors combined with lifestyle risk factors, such as smoking, may inform future preventive and screening strategies for bladder cancer.

Keywords: Bladder cancer; Gene-environment interaction; Genome-Wide Association Study (GWAS); Germline genetics.

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Conflict of interest statement

Financial disclosures: Stella Koutros certifies that all conflicts of interest, including specific financial interests and relationships and affiliations relevant to the subject matter or materials discussed in the manuscript (eg, employment/affiliation, grants or funding, consultancies, honoraria, stock ownership or options, expert testimony, royalties, or patents filed, received, or pending), are the following: Lars Dyrskjøt has sponsored research agreements with C2i Genomics, AstraZeneca, Natera, Photocure, and Ferring; has an advisory/consulting role at Ferring and UroGen; has received speaker/video honoraria from Roche and Pfizer, and is Chairman of the Board for BioXpedia A/S. Gudmar Thorleifsson, Thorunn Rafnar, and Kari Stefansson are employees of deCODE Genetics/Amgen. The remaining authors have nothing to disclose.

Figures

Figure 1.
Figure 1.
Estimates of absolute risk of bladder cancer for White non-Hispanic males and females by polygenic risk score (PRS) and smoking status. (A) Average and top (5% and 1%) absolute risks and 95% confidence intervals (CIs) for never, former, and current smokers by PRS deciles for White non-Hispanic males and females (age 50–80 yr). (b) Bar graph of average absolute risk for never, former, and current smokers showing that the risk difference increases with PRS decile. (C) Population density plots of the entire absolute risk distributions for male and female never, former, and current smokers. Green shading depicts the overlap in absolute risk distribution for never and current smokers, indicating that some proportion of never smokers at high genetic risk have the same absolute risk of bladder cancer as current smokers at low genetic risk.
Figure 2.
Figure 2.
Estimates of the number of bladder cancer cases that could be prevented according to the combination of polygenic risk score (PRS) and smoking status. (A) Inputs and data sources used in the analyses. (B) The number of bladder cancer cases that could be prevented by PRS deciles for males and females under two scenarios: (1) if all current smokers quit smoking and (2) if all current smokers had never started smoking. (C) Estimates of the number of cases that could be prevented for males and females by PRS deciles for the scenarios in B.

Comment in

References

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