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21.
  • Bonn, Stephanie E., et al. (författare)
  • Physical Activity and Survival among Men Diagnosed with Prostate Cancer
  • 2015
  • Ingår i: Cancer Epidemiology, Biomarkers and Prevention. - 1055-9965 .- 1538-7755. ; 24:1, s. 57-64
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Background: Few studies have investigated the association between post-diagnosis physical activity and mortality among men diagnosed with prostate cancer. The aim of this study was to investigate the effect of physical activity after a prostate cancer diagnosis on both overall and prostate cancer-specific mortality in a large cohort. Methods: Data from 4,623 men diagnosed with localized prostate cancer 1997-2002 and followed-up until 2012 were analyzed. HRs with 95% confidence intervals (CI) were estimated using Cox proportional hazards models to examine the association between post-diagnosis recreational MET-h/d, time spent walking/bicycling, performing household work or exercising, and time to overall and prostate cancer-specific death. All models were adjusted for potential confounders. Results: During the follow-up, 561 deaths of any cause and 194 deaths from prostate cancer occurred. Statistically significantly lower overall mortality rates were found among men engaged in 5 recreationalMET-h/d (HR, 0.63; 95% CI, 0.52-0.77), walking/ bicycling 20 min/d (HR, 0.70; 95% CI, 0.57-0.86), performing householdwork &gt; 1 h/d (HR, 0.71; 95% CI, 0.59-0.86), or exercising &gt; 1 h/wk (HR, 0.74; 95% CI, 0.61-0.90), compared with less active men within each activity type. For prostate cancer-specific mortality, statistically significantly lower mortality rates were seen among men walking/bicycling &gt;= 20 min/d (HR, 0.61; 95% CI, 0.43-0.87) or exercising 1 h/wk (HR, 0.68; 95% CI, 0.48-0.94). Conclusions: Higher levels of physical activity were associated with reduced rates of overall and prostate cancer-specific mortality. Impact: Our study further strengthens previous results indicating beneficial effects of physical activity on survival among men with prostate cancer. Cancer Epidemiol Biomarkers Prev; 24(1); 57-64.</p>
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22.
  • Bonn, Stephanie E, et al. (författare)
  • Physical activity and survival among men diagnosed with prostate cancer
  • 2015
  • Ingår i: Cancer Epidemiology, Biomarkers and Prevention. - 1055-9965 .- 1538-7755. ; 24:1, s. 57-64
  • Tidskriftsartikel (refereegranskat)abstract
    • <p><strong>BACKGROUND:</strong> Few studies have investigated the association between post-diagnosis physical activity and mortality among men diagnosed with prostate cancer. The aim of this study was to investigate the effect of physical activity after a prostate cancer diagnosis on both overall and prostate cancer-specific mortality in a large cohort.</p><p><strong>METHODS:</strong> Data from 4,623 men diagnosed with localized prostate cancer 1997-2002 and followed-up until 2012 were analyzed. HRs with 95% confidence intervals (CI) were estimated using Cox proportional hazards models to examine the association between post-diagnosis recreational MET-h/d, time spent walking/bicycling, performing household work or exercising, and time to overall and prostate cancer-specific death. All models were adjusted for potential confounders.</p><p><strong>RESULTS:</strong> During the follow-up, 561 deaths of any cause and 194 deaths from prostate cancer occurred. Statistically significantly lower overall mortality rates were found among men engaged in ≥5 recreational MET-h/d (HR, 0.63; 95% CI, 0.52-0.77), walking/bicycling ≥20 min/d (HR, 0.70; 95% CI, 0.57-0.86), performing household work ≥1 h/d (HR, 0.71; 95% CI, 0.59-0.86), or exercising ≥1 h/wk (HR, 0.74; 95% CI, 0.61-0.90), compared with less active men within each activity type. For prostate cancer-specific mortality, statistically significantly lower mortality rates were seen among men walking/bicycling ≥20 min/d (HR, 0.61; 95% CI, 0.43-0.87) or exercising ≥1 h/wk (HR, 0.68; 95% CI, 0.48-0.94).</p><p><strong>CONCLUSIONS:</strong> Higher levels of physical activity were associated with reduced rates of overall and prostate cancer-specific mortality.</p><p><strong>IMPACT:</strong> Our study further strengthens previous results indicating beneficial effects of physical activity on survival among men with prostate cancer.</p>
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23.
  • Brown, David A, et al. (författare)
  • Macrophage inhibitory cytokine 1 : a new prognostic marker in prostate cancer.
  • 2009
  • Ingår i: Clinical Cancer Research. - 1078-0432 .- 1557-3265. ; 15:21, s. 6658-6664
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>PURPOSE: High serum levels of macrophage inhibitory cytokine 1 (MIC-1) are strongly associated with metastatic prostate cancer, suggesting MIC-1 is a biomarker for prostate cancer prognosis. EXPERIMENTAL DESIGN: We conducted a prospective cohort study of 1,442 Swedish men with a pathologically verified diagnosis of prostate cancer between 2001 and 2003. Blood was drawn either pretreatment (n = 431) or posttreatment (n = 1,011) and cases were followed for a mean time of 4.9 years (range, 0.1-6.8 years). RESULTS: MIC-1 serum levels independently predicted poor cancer-specific survival with an almost 3-fold higher cancer death rate in patients with serum levels in the highest quartile compared with men with serum levels in the lowest quartile (adjusted hazard ratio, 2.98; 95% confidence interval, 1.82-4.68). Pretreatment MIC-1 levels revealed an even stronger association with disease outcome with an 8-fold higher death rate in the highest compared with the lowest category (adjusted hazard ratio, 7.98; 95% confidence interval, 1.73-36.86). Among patients considered to have localized disease, MIC-1 significantly increased the discriminative capacity between indolent and lethal prostate cancer compared with the established prognostic markers clinical stage, pathologic grade, and prostate-specific antigen level (P = 0.016). A sequence variant in the MIC-1 gene was associated with decreased MIC-1 serum levels (P = 0.002) and decreased prostate cancer mortality (P = 0.003), suggesting a causative role of MIC-1 in prostate cancer prognosis. CONCLUSIONS: Serum MIC-1 concentration is a novel biomarker capable of predicting prostate cancer prognosis.</p>
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26.
  • Carlsson, Per, et al. (författare)
  • Experimental investigation of an industrial scale black liquor gasifier : 1. Influence of reactor operation parameters on product gas composition
  • 2010
  • Ingår i: Fuel. - 0016-2361 .- 1873-7153. ; 89:12, s. 4025-4034
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>A novel technology to mitigate the climate changes and improve energy security is Pressurized Entrained flow High Temperature Black Liquor Gasification (PEHT-BLG) in combination with an efficient fuel synthesis using the resulting syngas. In order to optimise the technology for use in a pulp and paper mill based biorefinery, it is of great importance to understand how the operational parameters of the gasifier affect the product gas composition. The present paper is based on experiments where gas samples were withdrawn from the hot part of a 3 MW entrained flow pressurized black liquor gasifier of semi industrial scale using a high temperature gas sampling system. Specifically, the influence of process conditions on product gas composition (CO2, CO, H2, CH4, H2S, and COS) were examined by systematically varying the operational parameters: system pressure, oxygen to black liquor equivalence ratio, black liquor flow rate to pressure ratio and black liquor pre-heat temperature. Due to the harsh environment inside the gasification reactor, gas sampling is a challenging task. However, for the purpose of the current study, a specially designed high temperature gas sampling system was successfully developed and used. The results, obtained from two separate experimental campaigns, show that all of the investigated operational parameters have a significant influence on the product gas composition and present valuable information about to the process characteristics.</p>
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27.
  • Carlsson, Per, et al. (författare)
  • Spatially resolved measurements of gas composition in a pressurised black liquor gasifier
  • 2009
  • Ingår i: Environmental Progress & Sustainable Energy. - 1944-7442 .- 1944-7450. ; 28:3, s. 316-323
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Black liquor gasification is a new process for recovery of energy and chemicals in black liquor from the Kraft pulping process. The process can be combined with catalytic conversion of syngas into motor fuels. The potential for motor fuel production from black liquor in Sweden is to replace about 25% of the current consumption of gasoline and diesel. For Finland the figure is even higher while for Canada it is about 14% and for the USA about 2%.</p>
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28.
  • Cederquist, Kristina, et al. (författare)
  • A population based cohort study of patients with multiple colon and endometrial cancer: correlation of microsatellite instability (MSI) staus, age at diagnosis and cancer risk
  • 2001
  • Ingår i: International Journal of Cancer. - 0020-7136 .- 1097-0215. ; 91:4, s. 486-491
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Hereditary non-polyposis colorectal cancer, HNPCC, is an autosomal dominant condition predisposing to cancers of primarily the colorectum and the endometrium. The aim of our study was to identify persons at a high risk of hereditary colorectal cancer and to estimate their risk of colon and other HNPCC-associated tumours. Family histories of cancer were obtained on 89 persons with double primary (DP) cancers of the colon and the endometrium. The cancer risks in their 649 first-degree-relatives (FDR) were analysed. The microsatellite instability (MSI) status of the tumour of the proband was also analysed and the cancer risks were estimated in relation to MSI status and age at diagnosis in the proband (over or under 50 years). The overall standardised incidence ratio (SIR) was 1.69 (95% CI; 1.39-2.03). In the =50-year-old cohort the SIR was 2.67 (95% CI; 2.08-3.38). Colon, rectal and uterus cancer exhibited significantly increased risks. This risk was further increased in the =50-year-old MSI positive families. Several =50-year-old MSI negative HNPCC-like families with increased risks were also identified. In conclusion a FDR to a person with a DP cancer of the colorectum or the colon/endometrium have a significantly increased risk of having a colorectal or other HNPCC-associated cancers if the proband is diagnosed with one of the cancers before age 50. These families are candidates for genetic counselling and colorectal screening programmes. Mutations in mismatch repair genes can explain some of the increased risk in these families, but mutations in MSI negative families are probably due to other colon cancer susceptibility genes not yet described. Copyright 2001 Wiley-Liss, Inc.</p>
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29.
  • Cederquist, Kristina, 1971- (författare)
  • Genetic and epidemiological studies of hereditary colorectal cancer
  • 2005
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • <p>Lynch syndrome (Hereditary Nonpolyposis Colorectal Cancer, HNPCC) is the most common hereditary syndrome predisposing to colorectal cancer, accounting for 1-3% of all colorectal cancer. This multi-organ cancer predisposition syndrome is caused by mutations in the mismatch repair (MMR) genes, especially <em>MLH1</em> and <em>MSH2</em>, and to lesser extents <em>MSH6</em> and <em>PMS2</em>, which lead to widespread genetic instability and thus microsatellite instability (MSI). Hereditary cancer often manifests in two or more tumours in a single individual; 35-40% of Lynch syndrome patients have synchronous or metachronous tumours of the two major Lynch syndrome-related cancers: colorectal and endometrial.</p> <p>The main purposes of the work underlying this thesis were to identify persons at risk of Lynch syndrome or other types of hereditary colorectal cancer, to estimate the cancer risks associated with these predispositions and to identify the underlying genetic causes.</p> <p>A population-based cohort of 78 persons with double primary colorectal or colorectal and endometrial cancer was identified. Cancer risks in their 649 first-degree relatives were estimated in relation to tumour MSI status (positive or negative) and age at diagnosis (before or after 50 years of age) in the probands. The overall standardised incidence ratio was 1.69 (95% CI; 1.39-2.03). The highest risks for Lynch syndrome-associated cancers: (colorectal, endometrial, ovarian and gastric) were found in families with young MSI-positive probands, likely representing Lynch syndrome families. Importantly, no overall risk was found in families with old probands, irrespective of MSI status.</p> <p>Blood samples were available from 24 MSI-positive patients for mutation screening of <em>MLH1</em>, <em>MSH2</em> and <em>MSH6</em>. Sequence variants or rearrangements predicted to affect protein function were found in 16 patients. Six novel variants were found: two large rearrangements, two truncating and two missense mutations. The missense mutations were found to segregate in the families. Studies of allele frequencies, MSI and loss of immunostaning in tumours from family members further supports the hypothesis that these missense changes play a role in Lynch syndrome, as do the non-conservative nature and evolutionary conservation of the amino acid exchanges. Five families had mutations in <em>MLH1</em>, five in <em>MSH2</em>, and six in <em>MSH6</em>. The unexpectedly large impact of <em>MSH6</em> was in genealogical studies shown to be due to a founder effect. Cumulative risk studies showed that the <em>MSH6</em> families, despite their late age of onset, have a high lifetime risk for all Lynch syndrome-related cancers, significantly higher in women (89% by age 80 years) than in men (69%). The gender differences are in part due to high endometrial (70%) and ovarian cancer risk (33%) in addition to the high colorectal cancer risk (60%). These findings are of great importance for counselling and surveillance of families with <em>MSH6</em> mutations.</p> <p>Finally, in a large family with MSI-negative hereditary colorectal cancer for which the MMR genes and <em>APC</em> had been excluded as possible causes, a genome-wide linkage analysis was performed, resulting in a suggested linkage to chromosome 7.</p> <p>Conclusions: Relatives of probands with MSI-positive, double primary colorectal and endometrial cancer diagnosed before the age of 50 years have significantly increased risks of Lynch syndrome-related cancers. <em>MSH6</em> mutations, which have unusually high impact in this study population due to a founder effect, confer high cumulative risks of cancer despite the generally late age of onset.</p>
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