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  • 1
    Keywords: ENERGIES ; CANCER ; MODEL ; COHORT ; EPIDEMIOLOGY ; POPULATION ; RISK ; colon ; ASSOCIATION ; ACID ; ACIDS ; NO ; hormone ; ENERGY ; AGE ; WOMEN ; colorectal cancer ; MEN ; smoking ; COLORECTAL-CANCER ; COUNTRIES ; PROSTATE-CANCER ; cancer risk ; FIBER ; FRANCE ; COLON-CANCER ; MULTIVARIATE ; fatty acids ; FATTY-ACIDS ; DIETARY ; CANCER-RESEARCH ; CONSUMPTION ; European Prospective Investigation into Cancer and Nutrition ; FRUIT ; nutrition ; QUESTIONNAIRE ; CALIBRATION ; FOOD ; ASSOCIATIONS ; colon cancer ; WEIGHT ; CORONARY-HEART-DISEASE ; DIETARY-INTAKE MEASUREMENTS ; EPIC PROJECT ; HEIGHT
    Abstract: A link between unsaturated fatty acids or phytonutrients and reduced risk of colorectal cancer has been suggested. However, the effects of higher intake of dietary sources of these nutrients, such as the nuts and seeds food group, are less clear. The objective of this study was to determine the effects of nut and seed intake on colorectal cancer risk within the European Prospective Investigation into Cancer and Nutrition study, a large prospective cohort study involving 10 European countries. Total nut and seed intake was determined from country-specific dietary questionnaires. The data set included 478,040 subjects (141,988 men, 336,052 women) with a total of 855 (327 men, 528 women) colon and 474 (215 men, 259 women) rectal cancer cases. A multivariate Cox proportional hazards model, stratified by center and controlled for fruit intake, dietary fiber, energy, height, weight, sex, age, physical activity, and smoking, was used. The data show no association between higher intake of nuts and seeds and risk of colorectal, colon, and rectal cancers in men and women combined, but a significant inverse association was observed in subgroup analyses for colon cancer in women at the highest (〉6.2 g/d) versus the lowest (nonconsumers; hazard ratio, 0.69;, 95% confidence interval, 0.50-0.95) category of intake and for the linear effect of log-transformed intake (hazard ratio, 0.89; 95% confidence interval, 0.80-0.98), with no associations in men. It is not evident from this data why there may be a stronger association in women or why it may be limited to the colon, suggesting that much, further research is necessary
    Type of Publication: Journal article published
    PubMed ID: 15466975
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  • 2
    Keywords: ENERGIES ; CANCER ; MODEL ; FOLLOW-UP ; POPULATION ; RISK ; ASSOCIATION ; hormone ; ENERGY ; AGE ; WOMEN ; colorectal cancer ; MEN ; PROSPECTIVE COHORT ; smoking ; COLORECTAL-CANCER ; cancer risk ; FISH ; FIBER ; COLON-CANCER ; DOSE-RESPONSE ; Jun ; DIET ; DIETARY ; UNITED-STATES ; ALCOHOL-CONSUMPTION ; nutrition ; ASSOCIATIONS ; RE ; ENERGY-INTAKE ; EPIC CALIBRATION ; PHYSICAL-ACTIVITY ; INTERVAL ; TESTS ; alcohol consumption ; MEAT INTAKE ; DIETARY CARCINOGENS ; GENETIC SUSCEPTIBILITY ; N-NITROSATION ; RED MEAT
    Abstract: Background. Current evidence suggests that high red meat intake is associated with increased colorectal cancer risk. High fish intake may be associated with a decreased risk, but the existing evidence is less convincing. Methods: We prospectively followed 478040 men and women from 10 European countries who were free of cancer at enrollment between 1992 and 1998. Information on diet and lifestyle was collected at baseline. After a mean follow-up of 4.8 years, 1329 incident colorectal cancers were documented. We examined the relationship between intakes of red and processed meat, poultry, and fish and colorectal cancer risk using a proportional hazards model adjusted for age, sex, energy (nonfat and fat sources), height, weight, work-related physical activity, smoking status, dietary fiber and folate, and alcohol consumption, stratified by center. A calibration substudy based on 36994 subjects was used to correct hazard ratios (HRs) and 95% confidence intervals (CIs) for diet measurement errors. All statistical tests were two-sided. Results: Colorectal cancer risk was positively associated with intake of red and processed meat (highest [〉 160 g/day] versus lowest [〈 20 g/day] intake, HR = 1.35, 95% CI = 0.96 to 1.88; P-trend = .03) and inversely associated with intake of fish (〉 80 g/day versus 〈 10 g/day, HR = 0.69, 95% CI = 0.54 to 0.88; P-trend 〈 .001), but was not related to poultry intake. Correcting for measurement error strengthened the associations between colorectal cancer and red and processed meat intake (per 100-g increase HR = 1.25, 95% CI = 1.09 to 1.41, P-trend = .001 and HR = 1.55, 95% CI = 1.19 to 2.02, P-trend = .001 before and after calibration, respectively) and for fish (per 100 g increase HR = 0.70, 95% CI = 0.57 to 0.87, P-trend 〈 .001 and HR = 0.46, 95% CI = 0.27 to 0.77, P-trend = .003; before and after correction, respectively). In this study population, the absolute risk of development of colorectal cancer within 10 years for a study subject aged 50 years was 1.71% for the highest category of red and processed meat intake and 1.28% for the lowest category of intake and was 1.86% for subjects in the lowest category of fish intake and 1.28% for subjects in the highest category of fish intake. Conclusions: Our data confirm that colorectal cancer risk is positively associated with high consumption of red and processed meat and support an inverse association with fish intake
    Type of Publication: Journal article published
    PubMed ID: 15956652
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  • 3
    Keywords: CANCER ; MODEL ; MODELS ; FOLLOW-UP ; COHORT ; DISEASE ; MORTALITY ; RISK ; RISKS ; AGE ; WOMEN ; OBESITY ; smoking ; COUNTRIES ; TOBACCO ; GLUCOSE ; BODY ; DIABETES-MELLITUS ; nutrition ; pancreatic cancer ; RELATIVE RISK ; physical activity ; MASS INDEX ; PANCREATIC-CANCER ; PHYSICAL-ACTIVITY ; HEIGHT ; WAIST ; INTERVAL ; pancreatic ; INSULIN-RESISTANCE ; PARTICIPANTS ; anthropometry ; prospective ; RISK-FACTOR ; BODY-FAT DISTRIBUTION ; hip ; MALE SMOKERS
    Abstract: Tobacco smoking is the only established risk factor for pancreatic cancer. Results from several epidemiologic studies have suggested that increased body mass index and/or lack of physical activity may be associated with an increased risk of this disease. We examined the relationship between anthropometry and physical activity recorded at baseline and the risk of pancreatic cancer in the European Prospective Investigation into Cancer and Nutrition (n = 438,405 males and females age 19-84 years and followed for a total of 2,826,070 person-years). Relative risks (RR) were calculated using Cox proportional hazards models stratified by age, sex, and country and adjusted for smoking and self-reported diabetes and, where appropriate, height. In total, there were 324 incident cases of pancreatic cancer diagnosed in the cohort over an average of 6 years of follow-up. There was evidence that the RR of pancreatic cancer was associated with increased height [RR, 1.74; 95% confidence interval (95% CI), 1.20-2.52] for highest quartile compared with lowest quartile (P-trend = 0.001). However, this trend was primarily due to a low risk in the lowest quartile, as when this group was excluded, the trend was no longer statistically significant (P = 0.27). A larger waist-to-hip ratio and waist circumference were both associated with an increased risk of developing the disease (RR per 0.1, 1.24; 95% CI, 1.04-1.48; P-trend = 0.02 and RR per 10 cm, 1.13; 95% CI, 1.01-1.26; P-trend = 0.03, respectively). There was a nonsignificant increased risk of pancreatic cancer with increasing body mass index (RR, 1.09; 95% CI, 0.95-1.24 per 5 kg/m(2)), and a nonsignificant decreased risk with total physical activity (RR, 0.82; 95% CI, 0.50-1.35 for most active versus inactive). Future studies should consider including measurements of waist and hip circumference, to further investigate the relationship between central adiposity and the risk of pancreatic cancer
    Type of Publication: Journal article published
    PubMed ID: 16702364
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  • 4
    Keywords: CANCER ; Germany ; human ; MODEL ; MODELS ; FOLLOW-UP ; SUPPORT ; DEATH ; RISK ; RISKS ; TIME ; INDEX ; ASSOCIATION ; AGE ; WOMEN ; MEN ; OBESITY ; PROSPECTIVE COHORT ; smoking ; COUNTRIES ; RECRUITMENT ; PREDICTION ; ALCOHOL ; ALCOHOL-CONSUMPTION ; CONSUMPTION ; EPIC ; nutrition ; EUROPE ; RELATIVE RISK ; BODIES ; REGRESSION ; WEIGHT ; PHYSICAL-ACTIVITY ; HEIGHT ; LEVEL ; analysis ; methods ; BODY-MASS INDEX ; ALL-CAUSE MORTALITY ; alcohol consumption ; USA ; prospective ; BMI ; WAIST CIRCUMFERENCE ; TISSUE DISTRIBUTION ; MEDICINE ; NOV ; body mass ; RATIO ; European Prospective Investigation into Cancer ; PREDICTING MORTALITY ; ROC CURVE
    Abstract: BACKGROUND Previous studies have relied predominantly on the body-mass index (BMI, the weight in kilograms divided by the square of the height in meters) to assess the association of adiposity with the risk of death, but few have examined whether the distribution of body fat contributes to the prediction of death. METHODS We examined the association of BMI, waist circumference, and waist-to-hip ratio with the risk of death among 359,387 participants from nine countries in the European Prospective Investigation into Cancer and Nutrition (EPIC). We used a Cox regression analysis, with age as the time variable, and stratified the models according to study center and age at recruitment, with further adjustment for educational level, smoking status, alcohol consumption, physical activity, and height. RESULTS During a mean follow-up of 9.7 years, 14,723 participants died. The lowest risks of death related to BMI were observed at a BMI of 25.3 for men and 24.3 for women. After adjustment for BMI, waist circumference and waist-to-hip ratio were strongly associated with the risk of death. Relative risks among men and women in the highest quintile of waist circumference were 2.05 (95% confidence interval [CI], 1.80 to 2.33) and 1.78 (95% CI, 1.56 to 2.04), respectively, and in the highest quintile of waist-to-hip ratio, the relative risks were 1.68 (95% CI, 1.53 to 1.84) and 1.51 (95% CI, 1.37 to 1.66), respectively. BMI remained significantly associated with the risk of death in models that included waist circumference or waist-to-hip ratio (P〈0.001). CONCLUSIONS These data suggest that both general adiposity and abdominal adiposity are associated with the risk of death and support the use of waist circumference or waist-tohip ratio in addition to BMI in assessing the risk of death
    Type of Publication: Journal article published
    PubMed ID: 19005195
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  • 5
    Keywords: ENERGIES ; CANCER ; Germany ; MODEL ; MODELS ; PROSTATE ; FOLLOW-UP ; INFORMATION ; COHORT ; RISK ; RISKS ; ASSOCIATION ; NO ; HEALTH ; PLASMA ; ENERGY ; AGE ; MEN ; PROSPECTIVE COHORT ; smoking ; prostate cancer ; PROSTATE-CANCER ; ethanol ; MULTIVARIATE ; RECRUITMENT ; ALCOHOL ; ALCOHOL-CONSUMPTION ; CONSUMPTION ; nutrition ; RELATIVE RISK ; ONCOLOGY ; WEIGHT ; ENERGY-INTAKE ; PHYSICAL-ACTIVITY ; HEIGHT ; biomarker ; USA ; cancer research ; RISK-FACTOR ; MIDDLE-AGED MEN ; energy intake ; WINE ; BEVERAGES
    Abstract: Alcohol is a risk factor for several types of cancer. However, the results for prostate cancer have been inconsistent, with most studies showing no association. Within the European Prospective Investigation into Cancer and Nutrition, detailed information were collected from 142,607 male participants on the intake of alcoholic beverages at recruitment (for 100% of the cohort) and over lifetime (for 76% of the cohort) between 1992 and 2000. During a median follow-up of 8.7 years, 2,655 prostate cancer cases were observed. Multivariate Cox proportional hazard models were used to examine the association of alcohol consumption at recruitment and average lifetime alcohol consumption with prostate cancer adjusted for age, center, smoking, height, weight, physical activity, and nonalcohol energy intake. Overall, neither alcohol consumption at baseline nor average lifetime alcohol consumption was associated with the risk for prostate cancer in this cohort of men. Men who consumed 〉= 60 g alcohol per day had a relative risk of 0.88 [95% confidence interval (95% CI) 0.72-1.081 compared with men with an intake of 0.1-4.9 g/d; the respective relative risk for average lifetime intake was 1.09 (95% CI, 0.86-1.39). For advanced prostate cancer (n=537), the relative risks for 〉= 60 and 0.1-4.9 g alcohol per day at baseline were 0.98 (95% CI, 0.66-1.44) and 1.28 (95% CI, 0.79-2-07), respectively, for average lifetime intake. No statistically significant association was observed for alcohol intake from specific alcoholic beverages. Our results indicate no association between the consumption of alcohol and prostate cancer in this cohort of European men
    Type of Publication: Journal article published
    PubMed ID: 18483352
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  • 6
    Keywords: CANCER ; cohort study ; RISK ; PROTEIN ; DIFFERENTIATION ; BREAST-CANCER ; AGE ; nutrition ; pancreatic cancer ; CELL-GROWTH ; FACTOR-ALPHA ; IGF-I ; EPIC PROJECT ; GROWTH-FACTOR-I ; SERUM-LEVELS ; C-PEPTIDE ; IGFBP-3 ; MALE SMOKERS ; FACTOR BINDING PROTEIN-3 ; prospective cohorts
    Abstract: Background:Insulin-like growth factors (IGFs) and their binding proteins (BPs) regulate cell differentiation, proliferation and apoptosis, and may have a role in the aetiology of various cancers. Information on their role in pancreatic cancer is limited and was examined here in a case-control study nested within the European Prospective Investigation into Cancer and Nutrition.Methods:Serum concentrations of IGF-I and IGFBP-3 were measured using enzyme-linked immunosorbent assays in 422 cases and 422 controls matched on age, sex, study centre, recruitment date, and time since last meal. Conditional logistic regression was used to compute odds ratios (OR) and 95% confidence intervals (CI) adjusted for confounding variables.Results:Neither circulating levels of IGF-I (OR=1.21, 95% CI 0.75-1.93 for top vs bottom quartile, P-trend 0.301), IGFBP-3 (OR=1.00, 95% CI 0.66-1.51, P-trend 0.79), nor the molar IGF-I/IGFBP-3 ratio, an indicator of free IGF-I level (OR=1.22, 95% CI 0.75-1.97, P-trend 0.27), were statistically significantly associated with the risk of pancreatic cancer. In a cross-classification, however, a high concentration of IGF-I with concurrently low levels of IGFBP-3 was related to an increased risk of pancreatic cancer (OR=1.72, 95% CI 1.05-2.83; P-interaction=0.154).Conclusion:On the basis of these results, circulating levels of components of the IGF axis do not appear to be the risk factors for pancreatic cancer. However, on the basis of the results of a subanalysis, it cannot be excluded that a relatively large amount of IGF-1 together with very low levels of IGFBP-3 might still be associated with an increase in pancreatic cancer risk.
    Type of Publication: Journal article published
    PubMed ID: 22315049
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  • 7
    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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  • 8
    Keywords: CANCER ; PROSTATE ; FOLLOW-UP ; DISEASE ; RISK ; RISKS ; INDEX ; ASSOCIATION ; NO ; HEALTH ; DESIGN ; PLASMA ; AGE ; MEN ; smoking ; COUNTRIES ; prostate cancer ; PROSTATE-CANCER ; cancer risk ; RECRUITMENT ; DIETARY ; ALCOHOL ; BODY ; European Prospective Investigation into Cancer and Nutrition ; nutrition ; tocopherols ; RELATIVE RISK ; BETA-CAROTENE ; VITAMIN-E ; HETEROGENEITY ; physical activity ; ALPHA-TOCOPHEROL ; carotenoids ; LYCOPENE ; MASS INDEX ; MASSES ; RETINOL ; SERUM ; BODIES ; REGRESSION ; ASSOCIATIONS ; RE ; CARDIOVASCULAR-DISEASE ; SUPPLEMENTATION ; PHYSICAL-ACTIVITY ; LEVEL ; USA ; prospective ; UNIT ; CANCER-RISK ; GAMMA-TOCOPHEROL ; nested case-control study ; micronutrients ; LOGISTIC-REGRESSION ; BODY-MASS ; BODY-MASS-INDEX
    Abstract: Background: Previous studies suggest that high plasma concentrations of carotenoids, retinol, or tocopherols may reduce the risk of prostate cancer. Objective: We aimed to examine the associations between plasma concentrations of 7 carotenoids, retinol, a-tocopherol, and,gamma-tocopherol and prostate cancer risk. Design: A total of 137 001 men in 8 European countries participated. After a mean of 6 y, 966 incident cases of prostate cancer with plasma were available. A total of 1064 control subjects were selected and were matched for study center, age, and date of recruitment. The relative risk of prostate cancer was estimated by conditional logistic regression, which was adjusted for smoking status, alcohol intake, body mass index, marital status, physical activity, and education level. Results: Overall, none of the micronutrients examined were significantly associated with prostate cancer risk. For lycopene and the sum of carotenoids, there was evidence of heterogeneity between the associations with risks of localized and advanced disease. These carotenoids were not associated with the risk of localized disease but were inversely associated with the risk of advanced disease. The risk of advanced disease for men in the highest fifth of plasma concentrations compared with men in the lowest fifth was 0.40 (95% CI: 0. 19, 0.88) for lycopene and 0.35 (95% CI: 0. 17, 0.78) for the sum of carotenoids. Conclusions: We observed no associations between plasma concentrations of carotenoids, retinol, or tocopherols and overall prostate cancer risk. The inverse associations of lycopene and the sum of carotenoids with the risk of advanced disease may involve a protective effect, an association of dietary choice with delayed detection of prostate cancer, reverse causality, or other factors
    Type of Publication: Journal article published
    PubMed ID: 17823432
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  • 9
    Keywords: CANCER ; Germany ; COHORT ; DISEASE ; POPULATION ; TIME ; METABOLITES ; PLASMA ; AGE ; smoking ; COUNTRIES ; SWEDEN ; REGION ; MASS-SPECTROMETRY ; REGIONS ; POPULATIONS ; DIETARY ; ALCOHOL ; nutrition ; VEGETABLES ; EUROPE ; LIGNANS ; BREAST-CANCER RISK ; isoflavones ; ADULTS ; REGRESSION ; EPIC PROJECT ; analysis ; USA ; prospective ; LIMIT ; ENTEROLACTONE CONCENTRATION ; DAIDZEIN ; genistein ; SERUM ENTEROLACTONE ; EQUOL ; DIETARY PHYTOESTROGEN ; LEVEL CORRELATIONS ; NUTRITION-NORFOLK ; PLANT FOODS
    Abstract: Dietary phytoestrogens may play a role in chronic disease occurrence. The aim of our study was to assess the variability of plasma concentrations in European populations. We included 15 geographical regions in 9 European countries (Denmark, France, Germany, Greece, Italy, Spain, Sweden, The Netherlands, and UK) and a 16th region, Oxford, UK, where participants were recruited from among vegans and vegetarians. All subjects were participants of the European Prospective Investigation into Cancer and Nutrition (EPIC). Plasma concentrations of 3 isoflavones(daidzein, genistein, and glycitein), 2 metabolites of daidzein [O-desmethylangolensin (O-DMA) and equol] and 2 mammalian lignans enterodiol and enterolactone) were measured in 1414 participants. We computed geometric means for each region and used multivariate regression analysis to assess the influence of region, adjusted for gender, age, BMI, alcohol intake, smoking status, and laboratory batch. Many subjects had concentrations below the detection limit [0.1 mu g/L (0.4 nmol/L)] for glycitein (80%), O-DMA (73%) and equol (62%). Excluding subjects from Oxford, UK, the highest concentrations of isoflavones were in subjects from the Netherlands and Cambridge, UK [2-6 mu g/L (7-24 nmol/L); P 〈 0.05], whereas concentrations for lignans were highest in Denmark [8 mu g/L (27 nmol/L); P 〈 0.05]. Isoflavones varied 8-to 13-fold, whereas lignans varied 4-fold. In the vegetarian/vegan cohort of Oxford, concentrations of isoflavones were 5-50 times higher than in nonvegetarian regions. Region was the most important determinant of plasma concentrations for all 7 phytoestrogens. Despite the fact that plasma concentrations of phytoestrogens in Europe were low compared with Asian populations, they varied substantially among subjects from the 16 different regions
    Type of Publication: Journal article published
    PubMed ID: 17449595
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  • 10
    Keywords: CANCER ; BLOOD ; COMMON ; COHORT ; RISK ; GENE ; TIME ; MARKER ; primary ; GENETIC POLYMORPHISMS ; ASSOCIATION ; polymorphism ; POLYMORPHISMS ; single nucleotide polymorphism ; ACID ; NO ; HEALTH ; PLASMA ; AGE ; etiology ; cancer risk ; case-control studies ; European Prospective Investigation into Cancer and Nutrition ; GASTRIC-CANCER ; nutrition ; STOMACH-CANCER ; SINGLE ; DEFICIENCY ; ONCOLOGY ; case control study ; case-control study ; REGRESSION ; ASSOCIATIONS ; VARIANT ; INCREASE ; SINGLE NUCLEOTIDE POLYMORPHISMS ; prospective studies ; gastric cancer ; METHYLENETETRAHYDROFOLATE REDUCTASE ; MTHFR ; LEVEL ; biomarker ; case control studies ; HELICOBACTER-PYLORI INFECTION ; GENOTYPE ; LOCUS ; single-nucleotide ; USA ; C677T POLYMORPHISM ; prospective ; prospective study ; INCREASED RISK ; odds ratio ; cancer research ; CANCER-RISK ; CHINESE POPULATION ; nested case-control study ; case control ; LOGISTIC-REGRESSION ; MENDELIAN RANDOMIZATION ; PLASMA-CONCENTRATION ; chronic atrophic gastritis ; gastric ; pepsinogen ; MTHFR POLYMORPHISMS ; 5,10-METHYLENETETRAHYDROFOLATE REDUCTASE ; EPIC-EURGAST ; MICROBIOLOGICAL ASSAY
    Abstract: Previous studies have shown inconsistent associations of folate intake and polymorphisms of the methylenetetrahydrofolate reductase (MTHFR) gene with gastric cancer risk. Our nested case-control study within the European Prospective Investigation into Cancer and Nutrition cohort is the first prospective study of blood folate levels and gastric cancer. Gastric cancer cases (n = 247) and controls (n = 631) were matched for study center, age, sex, and time of blood donation. Two common single nucleotide polymorphisms of the MTHFR gene were determined, as were plasma concentrations of folate, cobalamin (vitamin B12), total homocysteine, and methylmalonic acid (cobalamin deficiency marker) in prediagnostic plasma. Risk measures were calculated with conditional logistic regression. Although no relations were observed between plasma folate or total homocysteine concentrations and gastric cancer, we observed a trend toward lower risk of gastric cancer with increasing cobalamin concentrations (odds ratio, 0.79 per SD increase in cobalamin; P = 0.01). Further analyses showed that the inverse association between cobalamin and gastric cancer was confined to cancer cases with low pepsinogen A levels (marker of severe chronic atrophic gastritis) at the time of blood sampling. The 677 C -〉 T MTHFR polymorphism was not associated with gastric cancer, but we observed an increased risk with the variant genotype of the 1298 A -〉 C polymorphism (odds ratio, 1.47 for CC versus AA; P = 0.04). In conclusion, we found no evidence of a role of folate in gastric cancer etiology. However, we observed increased gastric cancer risk at low cobalamin levels that was most likely due to compromised cobalamin status in atrophic gastritis preceding gastric cancer
    Type of Publication: Journal article published
    PubMed ID: 18006931
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