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Sökning: WFRF:(Stenling Roger)

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41.
  • Sala, Nuria, et al. (författare)
  • Prostate stem-cell antigen gene is associated with diffuse and intestinal gastric cancer in Caucasians: Results from the EPIC-EURGAST study
  • 2012
  • Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136 .- 1097-0215. ; 130:10, s. 2417-2427
  • Tidskriftsartikel (refereegranskat)abstract
    • A genome-wide study performed in a Japanese population identified a strong association between SNP rs2294008 (Met1Thr) in the Prostate Stem Cell Antigen gene (PSCA) and diffuse-type gastric cancer (GC). This association was validated in different Asian populations, and, very recently, a study has been published in Caucasians. In this study, we analyzed the association between PSCA variation and GC risk in Caucasians from the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. Six tagSNPs covering the PSCA gene region were genotyped in 411 incident gastric adenocarcinoma cases and 1530 matched controls from a nested casecontrol study in the EPIC cohort. Associations were analyzed by unconditional logistic regression, adjusting for age, sex and country. The T allele of rs2294008 in PSCA was found to be a highly significant risk factor for GC (per allele OR = 1.42, 95% CI: 1.231.66, p-value = 6.5 x 10-6), particularly of the noncardia-type (per allele OR = 1.47, 95% CI: 1.191.81, p-value = 3 x 10-4). At contrast with previous studies, no significant differences were observed between the diffuse (per allele OR = 1.54, 95% CI: 1.201.96, p-value = 5 x 10-4) and the intestinal (per allele OR = 1.52, 95% CI: 1.201.93, p-value = 5 x 10-4) GC histological subtypes. Although rs12155758 and rs9297976 were also found associated with GC, this association appeared to be due to linkage disequilibrium with rs2294008. Haplotype analysis did not provide additional information. These results confirm the association between variation in the promoter region of PSCA and GC risk in Caucasians and also indicate that the rs2294008 variant is a similar risk factor for both the diffuse and intestinal-types of GC.
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42.
  • Serafini, Mauro, et al. (författare)
  • Dietary total antioxidant capacity and gastric cancer risk in the European prospective investigation into cancer and nutrition study
  • 2012
  • Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136 .- 1097-0215. ; 131:4, s. 544-554
  • Tidskriftsartikel (refereegranskat)abstract
    • A high intake of dietary antioxidant compounds has been hypothesized to be an appropriate strategy to reduce gastric cancer (GC) development. We investigated the effect of dietary total antioxidant capacity (TAC) in relation to GC in the European Prospective Investigation into Cancer (EPIC) study including 23 centers in 10 European countries. A total of 521,457 subjects (153,447 men) aged mostly 3570 years old, were recruited largely between 1992 and 1998. Ferric reducing antioxidant potential (FRAP) and total radical-trapping antioxidant parameter (TRAP), measuring reducing and chain-breaking antioxidant capacity were used to measure dietary TAC from plant foods. Dietary antioxidant intake is associated with a reduction in the risk of GC for both FRAP (adjusted HR 0.66; 95%CI (0.460.95) and TRAP (adjusted HR 0.61; 95%CI (0.430.87) (highest vs. lowest quintile). The association was observed for both cardia and noncardia cancers. A clear effect was observed in smokers with a significant reduction in GC risk for the fifth quintile of intake for both assays (highest vs. lowest quintile: adjusted HR 0.41; 95%CI (0.220.76) p for trend <0.001 for FRAP; adjusted HR 0.52; 95%CI (0.280.97) p for trend <0.001 for TRAP) but not in nonsmokers. In former smokers, the association with FRAP intake was statistically significant (highest vs. lowest quintile: adjusted HR 0.4; 95%CI (0.210.75) p < 0.05); no association was observed for TRAP. Dietary antioxidant capacity intake from different sources of plant foods is associated with a reduction in the risk of GC.
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43.
  • Steffen, Annika, et al. (författare)
  • Anthropometry and Esophageal Cancer Risk in the European Prospective Investigation into Cancer and Nutrition
  • 2009
  • Ingår i: Cancer Epidemiology Biomarkers & Prevention. - 1538-7755 .- 1055-9965. ; 18:7, s. 2079-2089
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Increasing evidence suggests that general obesity [measured by body mass index (BMI)] is positively associated with risk of esophageal adenocarcinoma (EAC). In contrast, previous studies have shown inverse relations with esophageal squamous cell carcinoma (ESCC). However, it is still unclear whether body fat distribution, particularly abdominal obesity, is associated with each type of esophageal cancer. Methods: We applied multivariable adjusted Cox proportional hazards regression to investigate the association between anthropometric measures and risk of EAC and ESCC among 346,554 men and women participating in the European Prospective Investigation into Cancer and Nutrition. All statistical tests were two sided. Results: During 8.9 years of follow-up, we documented 88 incident cases of EAC and 110 cases of ESCC. BMI, waist circumference, and waist-to-hip ratio (WHR) were positively associated with EAC risk [highest versus lowest quintile; relative risk (RR), 2.60; 95% confidence interval (95% CI), 1.23-5.51; P-trend < 0.01; RR, 3.07; 95% CI, 1.35-6.98; P-trend < 0.003; and RR, 2.12; 95% CI, 0.98-4.57; P-trend < 0.004]. In contrast, BMI and waist circumference were inversely related to ESCC risk, whereas WHR showed no association with ESCC. In stratified analyses, BMI and waist circumference were significantly inversely related to ESCC only among smokers but not among nonsmokers. However, when controlled for BMI, we found positive associations for waist circumference and WHR with ESCC, and these associations were observed among smokers and nonsmokers. Conclusion: General and abdominal obesity were associated with higher EAC risk. Further, our study suggests that particularly an abdominal body fat distribution might also be a risk factor for ESCC. (Cancer Epidemiol Biomarkers Prev 2009;18(7):2079-89)
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44.
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45.
  • Stenling, Roger (författare)
  • The enterocyte in small intestinal adaption : an experimental and clinicopathological study with special reference to the ultrastructure of the brush border
  • 1984
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • The small intestine mucosa is known to be able to adapt itself to several kinds of both physiological and pathological conditions. The adaptive patterns of the structure of the enterocytes, particularly their apical surface (brush border), were studied in three models: (1) in rats, subjected to antrectomy or antral exclusion, combined with gastroduodenostomy and gastrojejunostomy; (2) in rats with alloxan dia­betes; (3) in children with coeliac disease; a) in its active phase; b) after long-term treatment with gluten-free diets; c) after long-term challenge with dietary gluten following treatment; d) after short-term elimination of dietary gluten. Gut mucosa from fasting or fed, normal or sham-operated rats, fasting cats, and short-statured children with no signs of gastrointestinal disease served as controls. - The specimens were prepared for light microscopy (LM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Quantitation of structural variables was achieved by means of LM and TEM morphometrical procedures.Differentiation of the rat enterocytes from the base to the crest of the villi was structurally reflected by doubling of their apical cell area, an increase in cell height, and a decrease of both nuclear and mitochondrial volume densities. In mature normal rat enterocytes, high-power SEM showed regularly arranged, nude microvilli in thir apical surfaces, whereas in cat and man the apical surfaces were covered by a thick glycocalyx. - Fasting for 24 hours decreased the total length of the rat small intestine and the height of the enterocytes. Antrectomy and antral exclusion with gastrojejunostomy produced an increase of the apical surfaces of the enterocytes of the seif-emptying duodenal blind loop, whereas no changes occurred after antrectomy with gastroduodeno­stomy. In the jejunum, the apical surface area was reduced both after antrectomy and antral exclusion. In the diabetic rats a slight decrease of the apical surface area, together with an elongation of both the vil­li and the crypts, was observed in the jejunum, whereas no structural changes occurred in the duodenal mucosa.Both in active coeliac disease and after long-term challenge with dietary gluten, SEM analyses showed uniformly destructed villi. The api­cal surfaces of the enterocytes were frequently convex and irregular in size and delineation (the surface of the normal enterocytes was polygo­nal and flat). Ultrastructurally, the apical surfaces were severely damaged with a distortion of the glycocalyx and with marked irregularity of the microvilli. - After gluten elimination, the surface ultrastructu­re of the enterocytes in the coeliac gut mucosa generally showed a rapid, clear-cut restoration despite a remaining severe atrophy of the villi. Successful dietary treatment (after about one year of gluten-free diet) restored the small intestine mucosa to normal as assessed both by LM and low-power SEM. In contrast, high-power SEM often disclosed per­sisting lesions of the enterocytes. Another provocation with gluten for up to 9 days in clinically healed coeliac mucosa did not significantly alter the surface ultrastructure of the enterocytes.
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46.
  • Svenson, Ulrika, et al. (författare)
  • Telomere length in peripheral leukocytes is associated with immune cell tumor infiltration and prognosis in colorectal cancer patients
  • 2016
  • Ingår i: Tumor Biology. - : Springer Science and Business Media LLC. - 1010-4283 .- 1423-0380. ; 37:8, s. 10877-10882
  • Tidskriftsartikel (refereegranskat)abstract
    • Telomeres are protective structures at the end of chromosomes, essential for chromosomal integrity. A large number of studies have investigated leukocyte telomere length as a possible risk marker for various cancers, colorectal cancer (CRC) included. In contrast, studies investigating leukocyte telomere length in relation to CRC survival are lacking. We previously reported that relative telomere length (RTL) of leukocytes collected at diagnosis predicted survival in patients with breast and kidney cancer. We suggested that these findings might reflect various immunological mechanisms, affected by the presence of a tumor. In the present study, leukocyte RTL was examined in relation to immune cell tumor infiltration and prognosis in 130 patients with CRC diagnosis. RTL was measured with a well-established qPCR method. We found that patients with the highest degree of lymphocyte tumor infiltration had shorter leukocyte RTL. Consistent with our previous findings, short RTL was a favorable prognostic marker in univariate survival analysis. In the current study, RTL did not remain as an independent predictor in multivariate survival analysis, when including metastatic status in the model. However, a non-significant trend towards a similar telomere-associated survival pattern was observed in patients with limited disease. In contrast, for patients who died of other causes than CRC, short RTL was associated with significantly shorter survival time. To our knowledge, this is the first study to investigate an association between leukocyte RTL, immune cell tumor infiltration, and cancer-specific survival in CRC patients. Larger studies are warranted to verify these findings.
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47.
  • Uddhammar, Agneta, et al. (författare)
  • Increased mortality due to cardiovascular disease in patients with giant cell arteritis in Northern Sweden
  • 2002
  • Ingår i: Journal of Rheumatology. - 0315-162X .- 1499-2752. ; 29:4, s. 737-742
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective. To study the cause of death pattern in patients with giant cell arteritis (GCA) or polymyalgia rheumatica (PMR). and to analyze the effect of the disease, or its therapy, on the risk of a cardiovascular event (CVE). Methods. Patients with biopsy proven GCA or with PMR, whose condition was diagnosed between 1973 and 1979, were followed until December 31, 1995. The standardized mortality ratio (SMR) was estimated using data for the population of V sterbotten, Northern Sweden, as reference value. Information for sex, age at diagnosis, erythrocyte sedimentation rate (ESR) at diagnosis, corticosteroid therapy, comorbidity from diagnosis, and date and cause of death was collected. Results. A total of 136 patients with GCA and 35 with PMR were identified. At the time of followup 114 patients with GCA and 25 with PMR were deceased. The overall mortality was significantly increased in the female patients, SMR = 133 (95% Cl 110-162). Death due to cardiovascular disease (CVD) was significantly increased in both women and men, SMR = 149 (95% CI 118-189) and 158 (95% Cl 112-224), respectively, and mainly due to ischemic heart disease. An excess mortality was found in women with the hi-hest ESR, the highest prescribed dose of prednisolone at diagnosis, or a daily prednisolone dose of 10 mg or more one year after diagnosis. In multiple Cox regression analysis, male sex and hypertension significantly increased the risk of a CVE. Conclusion. Death due to CVD was increased in patients with GCA. Increased mortality was related to either the corticosteroid therapy itself or insufficient control of inflammation.
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48.
  • Van Guelpen, Bethany, et al. (författare)
  • Low folate levels may protect against colorectal cancer.
  • 2006
  • Ingår i: Gut. - : BMJ. - 0017-5749 .- 1468-3288. ; 55:10, s. 1461-6
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND AND AIMS: Dietary folate is believed to protect against colorectal cancer (CRC). However, few studies have addressed the role of circulating levels of folate. The aim of this study was to relate prediagnostic plasma folate and homocysteine concentrations and the methylenetetrahydrofolate reductase (MTHFR) 677C>T and 1298A>C polymorphisms to the risk of developing CRC. SUBJECTS: Subjects were 226 cases and 437 matched referents from the population based Northern Sweden Health and Disease Cohort. RESULTS: We observed a bell-shaped association between plasma folate concentrations and CRC risk; multivariate odds ratio for middle versus lowest quintile 2.00 (95% confidence interval (CI) 1.13-3.56). In subjects with follow up times greater than the median of 4.2 years however, plasma folate concentrations were strongly positively related to CRC risk; multivariate odds ratio for highest versus lowest quintile 3.87 (95% CI 1.52-9.87; p trend = 0.007). Homocysteine was not associated with CRC risk. Multivariate odds ratios for the MTHFR polymorphisms were, for 677 TT versus CC, 0.41 (95% CI 0.19-0.85; p trend = 0.062), and for 1298 CC versus AA, 1.62 (95% CI 0.94-2.81; p trend = 0.028). Interaction analysis suggested that the result for 1298A>C may have been largely due to linkage disequilibrium with 677C>T. The reduced CRC risk in 677 TT homozygotes was independent of plasma folate status. CONCLUSIONS: Our findings suggest a decreased CRC risk in subjects with low folate status. This possibility of a detrimental component to the role of folate in carcinogenesis could have implications in the ongoing debate in Europe concerning mandatory folate fortification of foods.
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49.
  • Vollset, Stein Emil, et al. (författare)
  • The association of gastric cancer risk with plasma folate, cobalamin, and Methylenetetrahydrofolate reductase polymorphisms in the European prospective investigation into cancer and nutrition
  • 2007
  • Ingår i: Cancer Epidemiology Biomarkers & Prevention. - 1538-7755. ; 16:11, s. 2416-2424
  • Tidskriftsartikel (refereegranskat)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.
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50.
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