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Search: (WFRF:(Freedman M)) pers:(Brenner H) > (2018)

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  • Dadaev, T, et al. (author)
  • Fine-mapping of prostate cancer susceptibility loci in a large meta-analysis identifies candidate causal variants
  • 2018
  • In: Nature communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 9:1, s. 2256-
  • Journal article (peer-reviewed)abstract
    • Prostate cancer is a polygenic disease with a large heritable component. A number of common, low-penetrance prostate cancer risk loci have been identified through GWAS. Here we apply the Bayesian multivariate variable selection algorithm JAM to fine-map 84 prostate cancer susceptibility loci, using summary data from a large European ancestry meta-analysis. We observe evidence for multiple independent signals at 12 regions and 99 risk signals overall. Only 15 original GWAS tag SNPs remain among the catalogue of candidate variants identified; the remainder are replaced by more likely candidates. Biological annotation of our credible set of variants indicates significant enrichment within promoter and enhancer elements, and transcription factor-binding sites, including AR, ERG and FOXA1. In 40 regions at least one variant is colocalised with an eQTL in prostate cancer tissue. The refined set of candidate variants substantially increase the proportion of familial relative risk explained by these known susceptibility regions, which highlights the importance of fine-mapping studies and has implications for clinical risk profiling.
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2.
  • Ordóñez-Me, J. M., et al. (author)
  • Impact of prediagnostic smoking and smoking cessation on colorectal cancer prognosis : a meta-analysis of individual patient data from cohorts within the CHANCES consortium
  • 2018
  • In: Annals of Oncology. - : Elsevier BV. - 0923-7534 .- 1569-8041. ; 29:2, s. 472-483
  • Journal article (peer-reviewed)abstract
    • Background: Smoking has been associated with colorectal cancer (CRC) incidence and mortality in previous studies and might also be associated with prognosis after CRC diagnosis. However, current evidence on smoking in association with CRC prognosis is limited.Patients and methods: For this individual patient data meta-analysis, sociodemographic and smoking behavior information of 12,414 incident CRC patients (median age at diagnosis: 64.3 years), recruited within 14 prospective cohort studies among previously cancer-free adults, was collected at baseline and harmonized across studies. Vital status and causes of death were collected for a mean follow-up time of 5.1 years following cancer diagnosis. Associations of smoking behavior with overall and CRC-specific survival were evaluated using Cox regression and standard meta-analysis methodology.Results: A total of 5,229 participants died, 3,194 from CRC. Cox regression revealed significant associations between former (hazard ratio (HR)=1.12; 95%-confidence interval (CI)=1.04-1.20) and current smoking (HR = 1.29; 95%CI=1.04-1.60) and poorer overall survival compared with never smoking. Compared with current smoking, smoking cessation was associated with improved overall (HR<10years=0.78; 95%CI=0.69-0.88; HR≥10years=0.78; 95%CI=0.63-0.97) and CRC-specific survival (HR≥10years=0.76; 95%CI=0.67-0.85).Conclusion: In this large meta-analysis including primary data of incident CRC patients from 14 prospective cohort studies on the association between smoking and CRC prognosis, former and current smoking were associated with poorer CRC prognosis compared with never smoking. Smoking cessation was associated with improved survival when compared with current smokers. Future studies should further quantify the benefits of non-smoking, both for cancer prevention and for improving survival among CRC patients, in particular also in terms of treatment response.
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