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61.
  • Hedelin, Maria, et al. (författare)
  • Dietary phytoestrogen, serum enterolactone and risk of prostate cancer : the cancer prostate Sweden study (Sweden)
  • 2006
  • Ingår i: Cancer Causes and Control. - Springer. - 0957-5243 .- 1573-7225. ; 17:2, s. 169-180
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>OBJECTIVE: Based on evidence that phytoestrogens may protect against prostate cancer, we evaluated the associations between serum enterolactone concentration or dietary phytoestrogen intake and risk of prostate cancer. METHODS: In our Swedish population-based case-control study, questionnaire-data were available for 1,499 prostate cancer cases and 1,130 controls, with serum enterolactone levels in a sub-group of 209 cases and 214 controls. Unconditional logistic regression was performed to estimate multivariate odds ratios (ORs) and 95% confidence intervals (CIs) for associations with risk of prostate cancer. RESULTS: High intake of food items rich in phytoestrogens was associated with a decreased risk of prostate cancer. The OR comparing the highest to the lowest quartile of intake was 0.74 (95% CI: 0.57-0.95; p-value for trend: 0.01). In contrast, we found no association between dietary intake of total or individual lignans or isoflavonoids and risk of prostate cancer. Intermediate serum levels of enterolactone were associated with a decreased risk of prostate cancer. The ORs comparing increasing quartiles of serum enterolactone concentration to the lowest quartile were, respectively, 0.28 (95% CI: 0.15-0.55), 0.63 (95% CI: 0.35-1.14) and 0.74 (95% CI: 0.41-1.32). CONCLUSIONS: Our results support the hypothesis that certain foods high in phytoestrogens are associated with a lower risk of prostate cancer.</p>
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62.
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63.
  • Hong, Mun-Gwan, et al. (författare)
  • A genome-wide assessment of variability in human serum metabolism
  • 2013
  • Ingår i: Human Mutation. - 1059-7794 .- 1098-1004. ; 34:3, s. 515-524
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The study of the genetic regulation of metabolism in human serum samples can contribute to a better understanding of the intermediate biological steps that lead from polymorphism to disease. Here, we conducted a genome-wide association study (GWAS) to discover metabolic quantitative trait loci (mQTLs) utilizing samples from a study of prostate cancer in Swedish men, consisting of 402 individuals (214 cases and 188 controls) in a discovery set and 489 case-only samples in a replication set. A global nontargeted metabolite profiling approach was utilized resulting in the detection of 6,138 molecular features followed by targeted identification of associated metabolites. Seven replicating loci were identified (PYROXD2, FADS1, PON1, CYP4F2, UGT1A8, ACADL, and LIPC) with associated sequence variants contributing significantly to trait variance for one or more metabolites (P = 10(-13) -10(-91)). Regional mQTL enrichment analyses implicated two loci that included FADS1 and a novel locus near PDGFC. Biological pathway analysis implicated ACADM, ACADS, ACAD8, ACAD10, ACAD11, and ACOXL, reflecting significant enrichment of genes with acyl-CoA dehydrogenase activity. mQTL SNPs and mQTL-harboring genes were over-represented across GWASs conducted to date, suggesting that these data may have utility in tracing the molecular basis of some complex disease associations.</p>
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64.
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65.
  • Hsu, Fang-Chi, et al. (författare)
  • A novel prostate cancer susceptibility locus at 19q13.
  • 2009
  • Ingår i: Cancer research. - 1538-7445. ; 69:7, s. 2720-3
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>A two-stage genome-wide association study (GWAS) of the Cancer Genetic Markers of Susceptibility (CGEMS) initiative identified single nucleotide polymorphisms (SNP) in 150 regions across the genome that may be associated with prostate cancer (PCa) risk. We filtered these results to identify 43 independent SNPs where the frequency of the risk allele was consistently higher in cases than in controls in each of the five CGEMS study populations. Genotype information for 22 of these 43 SNPs was obtained either directly by genotyping or indirectly by imputation in our PCa GWAS of 500 cases and 500 controls selected from a population-based case-control study in Sweden [Cancer of the Prostate in Sweden (CAPS)]. Two of these 22 SNPs were significantly associated with PCa risk (P&lt;0.05). We then genotyped these two SNPs in the remaining cases (n=2,393) and controls (n=1,222) from CAPS and found that rs887391 at 19q13 was highly associated with PCa risk (P=9.4 x 10(-4)). A similar trend of association was found for this SNP in a case-control study from Johns Hopkins Hospital (JHH), albeit the result was not statistically significant. Altogether, the frequency of the risk allele of rs887391 was consistently higher in cases than controls among each of seven study populations examined, with an overall P=3.2 x 10(-7) from a combined allelic test. A fine-mapping study in a 110-kb region at 19q13 among CAPS and JHH study populations revealed that rs887391 was the most strongly associated SNP in the region. Additional confirmation studies of this region are warranted.</p>
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66.
  • Jan, Michael, et al. (författare)
  • The roles of stress and social support in prostate cancer mortality.
  • 2016
  • Ingår i: Scandinavian journal of urology. - 2168-1813. ; 50:1, s. 47-55
  • Tidskriftsartikel (refereegranskat)abstract
    • This study aimed to evaluate the association between perceived stress, social support, disease progression and mortality in a nationwide population-based cohort of men with prostate cancer.
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67.
  • Jan, Michael, et al. (författare)
  • The roles of stress and social support in prostate cancer mortality
  • 2016
  • Ingår i: Scandinavian journal of urology. - 2168-1805 .- 2168-1813. ; 50:1, s. 47-55
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Objective: This study aimed to evaluate the association between perceived stress, social support, disease progression and mortality in a nationwide population-based cohort of men with prostate cancer. Materials and methods: The study surveyed 4105 Swedish men treated for clinically localized prostate cancer regarding stress, grief, sleep habits and social support. Associations between these factors and mortality were assessed using multivariate Cox regression analysis. Results: Men with the highest levels of perceived stress had a statistically significantly increased rate of prostate cancer-specific mortality compared with men with low stress levels (hazard ratio 1.66, 95% confidence interval 1.05-2.63). Men with high stress levels also had a high frequency of grieving and sleep loss. They also had fewer people with whom to share their emotional problems and felt an inability to share most of their problems with partners, friends and family. Conclusions: This study contributes to the growing field of psychosocial quality of life research in men with prostate cancer. The findings show a significant association between prostate cancer-specific mortality and perceived stress in patients initially diagnosed with localized, non-metastatic prostate cancer. Significant associations between perceived stress and various psychosocial factors were also seen. The findings of this study could prove useful to target interventions to improve quality of life in men with prostate cancer.</p>
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68.
  • Jan, Michael, et al. (författare)
  • The roles of stress and social support in prostate cancer mortality
  • 2016
  • Ingår i: Scandinavian journal of urology. - 2168-1805 .- 2168-1813. ; 50:1, s. 47-55
  • Tidskriftsartikel (refereegranskat)abstract
    • <p><strong>OBJECTIVE:</strong> This study aimed to evaluate the association between perceived stress, social support, disease progression and mortality in a nationwide population-based cohort of men with prostate cancer.</p><p><strong>MATERIALS AND METHODS:</strong> The study surveyed 4105 Swedish men treated for clinically localized prostate cancer regarding stress, grief, sleep habits and social support. Associations between these factors and mortality were assessed using multivariate Cox regression analysis.</p><p><strong>RESULTS:</strong> Men with the highest levels of perceived stress had a statistically significantly increased rate of prostate cancer-specific mortality compared with men with low stress levels (hazard ratio 1.66, 95% confidence interval 1.05-2.63). Men with high stress levels also had a high frequency of grieving and sleep loss. They also had fewer people with whom to share their emotional problems and felt an inability to share most of their problems with partners, friends and family.</p><p><strong>CONCLUSIONS:</strong> This study contributes to the growing field of psychosocial quality of life research in men with prostate cancer. The findings show a significant association between prostate cancer-specific mortality and perceived stress in patients initially diagnosed with localized, non-metastatic prostate cancer. Significant associations between perceived stress and various psychosocial factors were also seen. The findings of this study could prove useful to target interventions to improve quality of life in men with prostate cancer.</p>
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69.
  • Jin, Guangfu, et al. (författare)
  • Validation of prostate cancer risk-related loci identified from genome-wide association studies using family-based association analysis : evidence from the International Consortium for Prostate Cancer Genetics (ICPCG)
  • 2012
  • Ingår i: Human Genetics. - 0340-6717 .- 1432-1203. ; 131:7, s. 1095-1103
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Multiple prostate cancer (PCa) risk-related loci have been discovered by genome-wide association studies (GWAS) based on case-control designs. However, GWAS findings may be confounded by population stratification if cases and controls are inadvertently drawn from different genetic backgrounds. In addition, since these loci were identified in cases with predominantly sporadic disease, little is known about their relationships with hereditary prostate cancer (HPC). The association between seventeen reported PCa susceptibility loci was evaluated with a family-based association test using 1,979 hereditary PCa families of European descent collected by members of the International Consortium for Prostate Cancer Genetics, with a total of 5,730 affected men. The risk alleles for 8 of the 17 loci were significantly over-transmitted from parents to affected offspring, including SNPs residing in 8q24 (regions 1, 2 and 3), 10q11, 11q13, 17q12 (region 1), 17q24 and Xp11. In subgroup analyses, three loci, at 8q24 (regions 1 and 2) plus 17q12, were significantly over-transmitted in hereditary PCa families with five or more affected members, while loci at 3p12, 8q24 (region 2), 11q13, 17q12 (region 1), 17q24 and Xp11 were significantly over-transmitted in HPC families with an average age of diagnosis at 65 years or less. Our results indicate that at least a subset of PCa risk-related loci identified by case-control GWAS are also associated with disease risk in HPC families.</p>
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70.
  • Johansson, Mattias, et al. (författare)
  • Comprehensive evaluation of genetic variation in the IGF1 gene and risk of prostate cancer
  • 2007
  • Ingår i: International Journal of Cancer. - 0020-7136 .- 1097-0215. ; 120:3, s. 539-542
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Insulin-like growth factor-I (IGF1) stimulates cell proliferation, decreases apoptosis, and has been implicated in cancer development. Epidemiological studies have shown elevated levels of circulating IGF1 to be associated with increased risk of prostate cancer. To what extent genetic variation in the IGF1 gene is related to prostate cancer risk is largely unknown. We performed a comprehensive haplotype tagging (HT) assessment of single nucleotide polymorphisms (SNPs) representing the common haplotype variation in the IGF1 gene. We genotyped 10 SNPs (9 haplotype tagging SNPs (htSNPs)) within Cancer Prostate in Sweden (CAPS), a case–control study of 2,863 cases and 1,737 controls, in order to investigate if genetic variation in the IGF1 gene is associated with prostate cancer risk. Three haplotype blocks were identified across the IGF1 gene and 9 SNPs were selected as haplotype tagging SNPs. Common haplotypes in the block covering the 3′ region of the IGF1 gene showed significant global association with prostate cancer risk (p = 0.004), with one particular haplotype giving an odds ratio of 1.46 (95% CI = 1.15–1.84, p = 0.002). This haplotype had a prevalence of 5% in the study population. Our results indicate that common variation in the IGF1 gene, particularly in the 3′ region, may affect prostate cancer risk. Further studies on genetic variations in the IGF1 gene in relation to prostate cancer risk as well as to circulating levels of IGF1 are needed to confirm this novel finding.</p>
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