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  • CARCINOGENESIS  (3)
  • 1
    Keywords: CANCER ; BLOOD ; RISK ; ENZYMES ; GENE ; GENES ; ACTIVATION ; DNA ; CARCINOGENESIS ; GENETIC POLYMORPHISMS ; ASSOCIATION ; polymorphism ; POLYMORPHISMS ; AGE ; CIGARETTE-SMOKING ; COUNTRIES ; GENOTYPES ; COLORECTAL CANCERS ; LINKAGE DISEQUILIBRIUM ; adenocarcinoma ; case-control studies ; TOBACCO ; GASTRIC-CANCER ; nutrition ; SMOKERS ; case-control study ; VARIANT ; TOBACCO-SMOKE ; GSTM1 ; GSTT1 ; gastric cancer ; S-TRANSFERASE M1 ; case control studies ; INTERVAL ; ENZYME ; GENETIC-POLYMORPHISM ; LOCUS ; FAMILY-HISTORY ; prospective ; ALLELE FREQUENCIES ; COMPOUND ; EPOXIDE HYDROLASE POLYMORPHISMS ; EUROPEAN COUNTRIES ; HIGH-INCIDENCE AREA ; INCREASED RISK ; NEVER SMOKERS ; odds ratio ; T1 NULL GENOTYPES ; tobacco smoke ; UNIT
    Abstract: Metabolizing enzymes, which often display genetic polymorphisms, are involved in the activation of compounds present in tobacco smoke that may be relevant to gastric carcinogenesis. We report the results of a study looking at the association between risk of gastric adenocarcinoma and polymorphisms in genes CYP1A1, CYP1A2, EPHX1, and GSTT1. A nested case-control study was carried out within the European Prospective Investigation into Cancer and Nutrition, developed in 10 European countries. The study includes 243 newly diagnosed cases of histologically confirmed gastric adenocarcinoma and 946 controls matched by center, age, sex, and date of blood collection. Genotypes were determined in nuclear DNA from WBCs. We found an increased risk of gastric cancer for homozygotes for C (histidine) variant in Y113H of EPHX1 (odds ratio, 1.91; 95% confidence interval, 1.19-3.07) compared with subjects with TC/TT. There was also a significant increased risk for smokers carrying at least one variant allele A in Ex7+129C 〉 A (m4) of CYP1A1 and never smokers with null GSTT1 and allele A in the locus -3859G 〉 A of CYP1A2. Most of these genes are involved in the activation and detoxification of polycyclic aromatic hydrocarbons, suggesting a potential role of these compounds in gastric carcinogenesis
    Type of Publication: Journal article published
    PubMed ID: 17164366
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  • 2
    Keywords: CARCINOGENESIS ; WOMEN ; meat ; nutrition ; STOMACH-CANCER ; SERUM FERRITIN ; STORES
    Abstract: Although it appears biologically plausible for iron to be associated with gastric carcinogenesis, the evidence is insufficient to lead to any conclusions. To further investigate the relationship between body iron status and gastric cancer risk, we conducted a nested case-control study in the multicentric European Prospective Investigation into Cancer and Nutrition (EPIC) study. The study included 456 primary incident gastric adenocarcinoma cases and 900 matched controls that occurred during an average of 11 years of follow-up. We measured prediagnostic serum iron, ferritin, transferrin and C-reactive protein, and further estimated total iron-binding capacity (TIBC) and transferrin saturation (TS). Odds ratios (ORs) and 95% confidence intervals (CIs) for the risk of gastric cancer by iron metrics were estimated from multivariable conditional logistic regression models. After adjusting for relevant confounders, we observed a statistically significant inverse association between gastric cancer and ferritin and TS indices (ORlog2 = 0.80, 95% CI = 0.72-0.88; OR10%increment = 0.87, 95% CI = 0.78-0.97, respectively). These associations appear to be restricted to noncardia gastric cancer (ferritin showed a p for heterogeneity = 0.04 and TS had a p for heterogeneity = 0.02), and no differences were found by histological type. TIBC increased risk of overall gastric cancer (OR50 microg/dl = 1.13, 95% CI = 1.02-1.2) and also with noncardia gastric cancer (p for heterogeneity = 0.04). Additional analysis suggests that time between blood draw and gastric cancer diagnosis could modify these findings. In conclusion, our results showed a decreased risk of gastric cancer related to higher body iron stores as measured by serum iron and ferritin. Further investigation is needed to clarify the role of iron in gastric carcinogenesis.
    Type of Publication: Journal article published
    PubMed ID: 26135329
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  • 3
    Keywords: CARCINOGENESIS ; prevention ; PROSPECTIVE COHORT ; smoking ; BLADDER-CANCER ; DIET ; carotenoids ; VITAMIN-C ; FOLATE ; nutrient
    Abstract: BACKGROUND: Many epidemiological studies have examined fruit and vegetable consumption in relation to the risk of urothelial cell carcinoma (UCC) of the bladder, but results are inconsistent. The association between fruit and vegetable consumption and UCC risk may vary by bladder tumour aggressiveness. Therefore, we examined the relation between fruit and vegetable consumption and the risk of aggressive and non-aggressive UCC in the European Prospective Investigation into Cancer and Nutrition (EPIC). METHODS: After 8.9years of follow-up, 947UCC were diagnosed among 468,656 EPIC participants. Of these, 421 could be classified as aggressive UCC and 433 as non-aggressive UCC cases. At recruitment, fruit and vegetable consumption was assessed by validated dietary questionnaires. Multivariable hazard ratios were estimated using Cox regression stratified by age, sex and center and adjusted for smoking status, duration and intensity of smoking, and energy intake. RESULTS: Total consumption of fruits and vegetables was not associated with aggressive UCC nor with non-aggressive UCC. A 25g/day increase in leafy vegetables and grapes consumption was associated with a reduced risk of non-aggressive UCC (hazard ratio (HR) 0.88; 95%confidence interval (CI) 0.78-1.00 and HR 0.87; 95%CI 0.77-0.98, respectively), while the intake of root vegetables was inversely associated with risk of aggressive UCC (HR 0.87; 95%CI 0.77-0.98). CONCLUSION: Our study did not confirm a protective effect of total fruit and/or vegetable consumption on aggressive or non-aggressive UCC. High consumption of certain types of vegetables and of fruits may reduce the risk of aggressive or non-aggressive UCC; however chance findings cannot be excluded.
    Type of Publication: Journal article published
    PubMed ID: 22863148
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