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Sökning: L773:0027 8874 OR L773:1460 2105 > Tidskriftsartikel

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1.
  • Doorakkers, Eva, et al. (författare)
  • Eradication of Helicobacter pylori and gastric and oesophageal cancer : a systematic review and meta-analysis of cohort studies
  • 2016
  • Ingår i: Journal of the National Cancer Institute. - Stockholm : Karolinska Institutet, Dept of Molecular Medicine and Surgery. - 0027-8874 .- 1460-2105.
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Helicobacter pylori (H. pylori) is associated with an increased risk of gastric adenocarcinoma and gastric mucosa associated lymphoid tissue (MALT) lymphoma, and a seemingly decreased risk of oesophageal adenocarcinoma. We aimed to assess how eradication therapy for H. pylori influences the risk of developing these cancers. Methods: This was a systematic review and meta-analysis. We searched PubMed, Web of Science, Embase and the Cochrane Library and selected articles that examined the risk of gastric cancer, MALT lymphoma or oesophageal cancer following eradication therapy, compared to a non-eradicated control group. Results: Among 3629 articles that were considered, 9 met the inclusion criteria. Of these, 8 cohort studies assessed gastric cancer, while 1 randomized trial assessed oesophageal cancer. Out of 12,899 successfully eradicated patients, 119 (0.9%) developed gastric cancer, compared to 208 (1.1%) out of 18,654 non-eradicated patients. The pooled relative risk of gastric cancer in all 8 studies was 0.46 (95% confidence interval 0.32-0.66, I2 32.3%) favouring eradication therapy. The 4 studies adjusting for time of follow-up and confounders showed a relative risk of 0.46 (95% confidence interval 0.29-0.72, I2 44.4%). Conclusion: This systematic review and meta-analysis indicates that eradication therapy for H. pylori prevents gastric cancer. There was insufficient literature for meta-analysis of MALT lymphoma or oesophageal cancer.
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2.
  • Wang, Qiao-Li, et al. (författare)
  • Smoking cessation and risk of esophageal cancer by histological type : systematic review and meta-analysis
  • 2017
  • Ingår i: Journal of the National Cancer Institute. - Stockholm : Karolinska Institutet, Dept of Molecular Medicine and Surgery. - 0027-8874 .- 1460-2105.
  • Tidskriftsartikel (refereegranskat)abstract
    • Smoking cessation is associated with a rapid and strong reduction in the risk of esophageal squamous cell carcinoma. The benefits of smoking cessation on esophageal squamous cell carcinoma are stronger in Western populations than in Asian populations. Any reduction of esophageal adenocarcinoma risk following smoking cessation is limited and slow. The preventive effects of smoking cessation on esophageal cancer shown in this study can help guide future health policy and clinical practice. Background: Tobacco smoking strongly increases risk of esophageal squamous cell carcinoma and moderately increases risk of esophageal adenocarcinoma. How smoking cessation influences esophageal cancer risk across histological subtypes, time latencies, and geographic regions is not clear. Methods: Studies were systematically searched on Medline, Embase, Web of Science, Cochrane Library, and ClinicalTrials.gov. Pooled estimates of risk ratios (RRs) were derived using a random effects model. Cochran’s Q test and I2 statistic were used to detect heterogeneity. Results: Among 15 009 studies, 52 fulfilled the inclusion criteria. Using nonsmokers as a reference, risk of esophageal squamous cell carcinoma was lower among former smokers (RR = 2.05, 95% confidence interval [CI] = 1.71 to 2.45) than among current smokers (RR = 4.18, 95% CI = 3.42 to 5.12). Compared with current smokers, a strong risk reduction was evident after five or more years (RR = 0.59, 95% CI = 0.47 to 0.75), and became stronger after 10 or more years (RR = 0.42, 95% CI = 0.34 to 0.51) and 20 or more years (RR = 0.34, 95% CI = 0.25 to 0.47) following smoking cessation. The risk reduction was strong in Western populations, while weak in Asian populations. Using nonsmokers as reference, the risk of esophageal adenocarcinoma was only slightly lower among former smokers (RR = 1.66, 95% CI = 1.48 to 1.85) than among current smokers (RR = 2.34, 95% CI = 2.04 to 2.69). The risk of esophageal adenocarcinoma did not show any clear reduction over time after smoking cessation, with a risk ratio of 0.72 (95% CI = 0.52 to 1.01) 20 or more years after smoking cessation, compared with current smokers. Conclusions: Smoking cessation time-dependently decreases risk of esophageal squamous cell carcinoma, particularly in Western populations, while it has limited influence on the risk of esophageal adenocarcinoma.
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3.
  • Abou, Diane S, et al. (författare)
  • Whole-Body and Microenvironmental Localization of Radium-223 in Naïve and Mouse Models of Prostate Cancer Metastasis.
  • 2016
  • Ingår i: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 1460-2105 .- 0027-8874. ; 108:5
  • Tidskriftsartikel (refereegranskat)abstract
    • Bone-metastatic, castration-resistant prostate cancer (bmCRPC) represents a lethal stage of the most common noncutaneous cancer in men. The recent introduction of Radium-223 dichloride, a bone-seeking alpha particle (α)-emitting radiopharmaceutical, demonstrates statistically significant survival benefit and palliative effect for bmCRPC patients. Clinical results have established safety and efficacy, yet questions remain regarding pharmacodynamics and dosing for optimized patient benefit.
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8.
  • Akre, O, et al. (författare)
  • Body size and testicular cancer
  • 2000
  • Ingår i: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 0027-8874 .- 1460-2105. ; 92:13, s. 1093-1096
  • Tidskriftsartikel (refereegranskat)
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9.
  • Aleksandrova, Krasimira, et al. (författare)
  • A prospective study of the immune system activation biomarker neopterin and colorectal cancer risk
  • 2015
  • Ingår i: Journal of the National Cancer Institute. - : Oxford University Press. - 0027-8874 .- 1460-2105. ; 107:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Neopterin may be relevant for colorectal cancer (CRC) development, as a biomarker of cellular immune activity exerting pleiotropic effects on cellular ageing, oxidative stress, and inflammation. So far, the association between prediagnostic neopterin and colon and rectal cancer risk has not been evaluated in human populations. Methods: A nested case-control study was conducted within the European Prospective Investigation into Cancer and Nutrition cohort using data on plasma concentrations of total neopterin (T-N, sum of neopterin and 7,8-dihydroneopterin) in 830 incident CRC case patients (561 colon and 269 rectal) matched within risk sets to 830 control participants. A subsequent replication study used data from the Hordaland Health Study, where 173 CRC case patients have been diagnosed among 6594 healthy participants over 12 years of follow-up. Results: After multivariable adjustment for a priori chosen CRC risk factors, a "U-shaped" association of T-N with CRC was revealed. Compared with the second quintile of the T-N distribution, the relative risks for the first, third, fourth, and fifth quintiles were 2.37 (95% CI = 1.66 to 3.39), 1.24 (95% CI = 0.87 to 1.77), 1.55 (95% CI = 1.08 to 2.22), and 2.31 (95% CI = 1.63 to 3.27), respectively. Replication of these associations within the Hordaland Health Study yielded similar results. No differences have been observed when the associations were explored by colon and rectal cancer site (two-sided P-difference = .87) and after excluding case patients diagnosed within the first four follow-up years. Conclusions: These novel findings provide evidence of the role of both suppressed and activated cell-mediated immunity as reflected by prediagnostic T-N concentrations in the development of CRC.
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10.
  • Allen, Naomi E, et al. (författare)
  • Selenium and Prostate Cancer : Analysis of Individual Participant Data From Fifteen Prospective Studies.
  • 2016
  • Ingår i: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 0027-8874 .- 1460-2105. ; 108:11
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Some observational studies suggest that a higher selenium status is associated with a lower risk of prostate cancer but have been generally too small to provide precise estimates of associations, particularly by disease stage and grade.METHODS: Collaborating investigators from 15 prospective studies provided individual-participant records (from predominantly men of white European ancestry) on blood or toenail selenium concentrations and prostate cancer risk. Odds ratios of prostate cancer by selenium concentration were estimated using multivariable-adjusted conditional logistic regression. All statistical tests were two-sided.RESULTS: Blood selenium was not associated with the risk of total prostate cancer (multivariable-adjusted odds ratio [OR] per 80 percentile increase = 1.01, 95% confidence interval [CI] = 0.83 to 1.23, based on 4527 case patients and 6021 control subjects). However, there was heterogeneity by disease aggressiveness (ie, advanced stage and/or prostate cancer death, Pheterogeneity = .01), with high blood selenium associated with a lower risk of aggressive disease (OR = 0.43, 95% CI = 0.21 to 0.87) but not with nonaggressive disease. Nail selenium was inversely associated with total prostate cancer (OR = 0.29, 95% CI = 0.22 to 0.40, Ptrend < .001, based on 1970 case patients and 2086 control subjects), including both nonaggressive (OR = 0.33, 95% CI = 0.22 to 0.50) and aggressive disease (OR = 0.18, 95% CI = 0.11 to 0.31, Pheterogeneity = .08).CONCLUSIONS: Nail, but not blood, selenium concentration is inversely associated with risk of total prostate cancer, possibly because nails are a more reliable marker of long-term selenium exposure. Both blood and nail selenium concentrations are associated with a reduced risk of aggressive disease, which warrants further investigation.
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