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Sökning: WFRF:(Söderberg Stefan)

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51.
  • Aleksandrova, Krasimira, et al. (författare)
  • Leptin and soluble leptin receptor in risk of colorectal cancer in the European prospective investigation into Cancer and nutrition cohort
  • 2012
  • Ingår i: Cancer Research. - Philadelphia, USA : American Association for Cancer Research. - 0008-5472 .- 1538-7445. ; 72:20, s. 5328-5337
  • Tidskriftsartikel (refereegranskat)abstract
    • Leptin, a peptide hormone produced primarily by the adipocytes, is hypothesized to play a role in the pathogenesis of colorectal cancer (CRC). Soluble leptin receptor (sOB-R) may regulate leptin's physiologic functions; however its relation to CRC risk is unknown. This study explored the association of leptin and sOB-R with risk of CRC in a prospective nested case-control study within the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. A total of 1,129 incident CRC cases (713 colon, 416 rectal) were matched within risk sets to 1,129 controls. Conditional logistic regression was used to calculate relative risks (RR) and 95% confidence intervals (CI). After multivariable adjustment including body mass index (BMI), waist circumference, and baseline leptin concentrations, sOB-R was strongly inversely associated with CRC (RR comparing the highest quintile vs. the lowest, 0.55; 95% CI, 0.40-0.76; P-trend = 0.0004) and colon cancer (RR, 0.42; 95% CI, 0.28-0.63, P-trend = 0.0001); whereas no association was seen for rectal cancer (RR adjusted for BMI and waist circumference, 0.83; 95% CI, 0.48-1.44, P-trend = 0.38). In contrast, leptin was not associated with risk of CRC (RR adjusted for BMI and waist circumference, 0.85; 95% CI, 0.56-1.29, P-trend = 0.23). Additional adjustments for circulating metabolic biomarkers did not attenuate these results. These novel findings suggest a strong inverse association between circulating sOB-R and CRC risk, independent of obesity measures, leptin concentrations, and other metabolic biomarkers. Further research is needed to confirm the potentially important role of sOB-R in CRC pathogenesis. Cancer Res; 72(20); 5328-37. (C) 2012 AACR.
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52.
  • Almevall, Albin Dahlin, et al. (författare)
  • Associations between everyday physical activity and morale in older adults
  • 2022
  • Ingår i: Geriatric Nursing. - : Elsevier. - 0197-4572 .- 1528-3984. ; 48, s. 37-42
  • Tidskriftsartikel (refereegranskat)abstract
    • Studies that objectively investigate patterns of everyday physical activity in relation to well-being and that use measures specific to older adults are scarce. This study aimed to explore objectively measured everyday physical activity and sedentary behavior in relation to a morale measure specifically constructed for older adults. A total of 77 persons (42 women, 35 men) aged 80 years or older (84.3 ± 3.8) wore an accelerometer device for at least 5 days. Morale was measured with the Philadelphia Geriatric Center Morale Scale (PGCMS). PGCMS scores were significantly positively associated with number of steps, time spent stepping, and time spent stepping at >75 steps per minute. Sedentary behavior did not associate with PGCMS. Promoting PA in the form of walking at any intensity–or even spending time in an upright position—and in any quantity may be important for morale, or vice versa, or the influence may be bidirectional.
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53.
  • Almevall, Ariel, et al. (författare)
  • Self-rated health in old age, related factors and survival: A 20-Year longitudinal study within the Silver-MONICA cohort
  • 2024
  • Ingår i: Archives of gerontology and geriatrics (Print). - : Elsevier. - 0167-4943 .- 1872-6976. ; 122
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction: Self-rated health (SRH) offers insights into the evolving health demographics of an ageing population.Aim: To assess change in SRH from old age to very old age and their associations with health and well-being factors, and to investigate the association between SRH and survival.Methods: All participants in the MONICA 1999 re-examination born before 1940 (n = 1595) were included in the Silver-MONICA baseline cohort. The Silver-MONICA follow-up started in 2016 included participants in the Silver-MONICA baseline cohort aged 80 years or older. Data on SRH was available for 1561 participants at baseline with 446 of them also participating in the follow-up. The follow-up examination included a wide variety of measurements and tests.Findings: Most participants rated their health as "Quite good" (54.5 %) at baseline. Over the study period, 42.6 % had stable SRH, 40.6 % had declined, and 16.8 % had improved. Changes in SRH were at follow-up significantly associated with age, pain, nutrition, cognition, walking aid use, self-paced gait speed, lower extremity strength, independence in activities of daily living, weekly physical exercise, outdoor activity, participation in organized activities, visiting others, morale, and depressive symptoms. SRH at baseline was significantly associated with survival (p < 0.05).Conclusion: This study demonstrates associations between changes in SRH and a multitude of health- and wellbeing-related factors, as well as a relation between survival and SRH, accentuating their relevance within the ageing population.
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54.
  • Amadou, Amina, et al. (författare)
  • Prevalent diabetes and risk of total, colorectal, prostate and breast cancers in an ageing population : meta-analysis of individual participant data from cohorts of the CHANCES consortium
  • 2021
  • Ingår i: British Journal of Cancer. - : Nature Publishing Group. - 0007-0920 .- 1532-1827. ; 124:11, s. 1882-1890
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: We investigated whether associations between prevalent diabetes and cancer risk are pertinent to older adults and whether associations differ across subgroups of age, body weight status or levels of physical activity.Methods: We harmonised data from seven prospective cohort studies of older individuals in Europe and the United States participating in the CHANCES consortium. Cox proportional hazard regression was used to estimate the associations of prevalent diabetes with cancer risk (all cancers combined, and for colorectum, prostate and breast). We calculated summary risk estimates across cohorts using pooled analysis and random-effects meta-analysis.Results: A total of 667,916 individuals were included with an overall median (P25–P75) age at recruitment of 62.3 (57–67) years. During a median follow-up time of 10.5 years, 114,404 total cancer cases were ascertained. Diabetes was not associated with the risk of all cancers combined (hazard ratio (HR) = 0.94; 95% confidence interval (CI): 0.86–1.04; I2 = 63.3%). Diabetes was positively associated with colorectal cancer risk in men (HR = 1.17; 95% CI: 1.08–1.26; I2 = 0%) and a similar HR in women (1.13; 95% CI: 0.82–1.56; I2 = 46%), but with a confidence interval including the null. Diabetes was inversely associated with prostate cancer risk (HR = 0.81; 95% CI: 0.77–0.85; I2 = 0%), but not with postmenopausal breast cancer (HR = 0.96; 95% CI: 0.89–1.03; I2 = 0%). In exploratory subgroup analyses, diabetes was inversely associated with prostate cancer risk only in men with overweight or obesity.Conclusions: Prevalent diabetes was positively associated with colorectal cancer risk and inversely associated with prostate cancer risk in older Europeans and Americans.
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55.
  • Andersson, Jonas, 1969- (författare)
  • Adipose tissue as an active organ : blood flow regulation and tissue-specific glucocorticoid metabolism
  • 2011
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Background: Despite advances in the treatment of atherosclerosis, cardiovascular disease is the leading cause of death worldwide. With the population getting older and more obese, the burden of cardiovascular disease may further increase. Premenopausal women are relatively protected against cardiovascular disease compared to men, but the reasons for this sex difference are partly unknown. Redistribution of body fat from peripheral to central depots may be a contributing factor. Central fat is associated with hyperlipidemia, hyperglycemia, hypertension, and insulin resistance. Two possible mediators of these metabolic disturbances are tissue-specific production of the stress hormone cortisol and adipose tissue blood flow (ATBF). The aim of this thesis was to determine the adipose tissue production of cortisol by the enzyme 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) and to investigate the regulation of ATBF. Materials and Methods: Cortisol release was estimated by labeled cortisol infusions and tissue-specific catheterizations of subcutaneous and visceral adipose tissue (VAT) in men. We investigated ATBF by 133Xe-washout and its relation to autonomic activity, endothelial function, adipose tissue distribution, and adipokines in different groups of women. We further investigated the effect of two diets and of weight loss on ATBF in women. Results: We demonstrated significant cortisol release from subcutaneous adipose tissue in humans. Splanchnic cortisol release was accounted for entirely by the liver. Cortisol release from VAT (to the portal vein) was not detected. ATBF decreased according to increasing weight and postmenopausal status, and the level of blood flow was associated with nitric oxide (NO) activity and autonomic activity. ATBF was also highly associated with leptin levels and both subcutaneous adipose tissue and VAT areas. After 6 months of diet and weight reduction, a significant difference in ATBF was observed between diet groups. Conclusions: Our data for the first time demonstrate the contributions of cortisol generated from subcutaneous adipose tissue, visceral tissues, and liver by 11β-HSD1. ATBF is linked to autonomic activity, NO activity, and the amount of adipose tissue (independent of fat depot). Postmenopausal overweight women exhibited a loss of ATBF flexibility, which may contribute to the metabolic dysfunction seen in this group. Weight loss in a diet program could not increase the ATBF, although there were ATBF differences between diet groups. The results will increase understanding of adipose tissue biology and contribute to the development of treatment strategies targeting obesity and obesity-related disorders.
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56.
  • Andersson, Jonas, et al. (författare)
  • Association of adipose tissue blood flow with fat depot sizes and adipokines in women
  • 2012
  • Ingår i: International Journal of Obesity. - : Nature Publishing Group. - 0307-0565 .- 1476-5497. ; 36:6, s. 783-789
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To explore possible associations between adipose tissue (AT) blood flow (ATBF), AT depot sizes and adipocyte-derived hormones (adipokines) in women.Subjects: In all, 43 healthy women were divided into four groups: normal-weight (n=11) and obese (n=11) pre-menopausal women and normal-weight (n=10) and obese (n=11) post-menopausal women.Methods: Fasting levels of adipokines were obtained, and a single-slice computed tomography scan at the level of L4-L5 was used to estimate fat depot sizes. ATBF was assessed by xenon washout while in a fasting state and after oral glucose load. We also measured glucose, insulin and non-esterified fatty acids.Results: Total, subcutaneous and visceral AT areas strongly correlated with ATBF (all P<0.001). Circulating leptin levels strongly and inversely correlated with ATBF (P=0.001), but this association did not remain after adjustment for body mass index. Adiponectin was not associated with blood flow.Conclusion: ATBF is closely linked to subcutaneous and visceral AT size. Further analyses are needed to determine possible mediators of this association, including mechanistic studies to assess a putative role for leptin as a significant modulator of blood flow. International Journal of Obesity advance online publication, 26 July 2011; doi:10.1038/ijo.2011.152.
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57.
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58.
  • Andersson, Sören, et al. (författare)
  • Frictions models for sliding dry, boundary and mixed lubricated contacts
  • 2007
  • Ingår i: Tribology International. - : Elsevier BV. - 0301-679X .- 1879-2464. ; 40, s. 580-587
  • Tidskriftsartikel (refereegranskat)abstract
    • Friction, lubrication, and wear have a strong influence on the performance and behavior of mechanical systems. This paper deals with different friction models for sliding contacts running under different conditions. The models presented are suited to different situations, depending on the type of contact, running conditions, and the behavior of interest. The models will be discussed from simulation and tribological points of view. The different types of friction models considered are:center dot friction models for transient sliding under dry, boundary and mixed lubrication conditions,center dot friction models for micro-displacements of engineering surfaces subjected to transient sliding,center dot friction models often used in the simulation and control of technical systems,center dot combined friction models that represent physical behaviors fairly well but are also suitable for use in simulating systems,center dot friction models that take into account the stochastic nature of interacting surface asperities
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59.
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60.
  • Andersson, Therese, 1983- (författare)
  • Acute Pulmonary Embolism : not just an acute condition after all
  • 2022
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Background: Acute pulmonary embolism (PE) is the third most common cardiovascular disease following myocardial infarction and stroke. Despite diagnostic improvements, the diagnosis of PE is still associated with many difficulties, as the symptoms of an acute PE are nonspecific. Even though an acute PE is associated with a high short-term mortality, less attention has been given to long-term mortality. In addition, the clinical course following an acute PE may be accompanied by substantial morbidity, and one feared complication is chronic thromboembolic pulmonary hypertension (CTEPH), a progressive pulmonary vasculopathy. In addition to CTEPH, increasing evidence suggests that a large proportion of patients report persistent functional impairment several years after an acute PE. Recently, the term chronic thromboembolic pulmonary disease (CTEPD) has been proposed for those with remaining symptoms and signs of residual thrombotic material in the pulmonary arteries. Methods and Results: A nation-wide Swedish cohort of all patients (n= 5793) diagnosed with an acute PE in 2005 was identified. The incidence of PE was 0.6/1000 person-years, and during a 4-year follow-up, the mortality was more than doubled compared with an age- and sex-matched control group. We found that the acute PE associated with multiple comorbidities, and with cardiovascular diseases in particular. All surviving patients in 2007 (n=3510) were invited to answer a questionnaire regarding dyspnea and related comorbidities. We demonstrated a substantially higher prevalence of both exertional dyspnea (53.0% vs. 17.3%) and wake-up dyspnea (12% vs. 1.7%) in patients compared to controls from the Northern Sweden MONICA study. Furthermore, PE associated independently with dyspnea in a multivariable analysis. Through a manual review of approximately 10 % of the patient’s medical records, a positive predictive value of 79% was found for the PE diagnosis. Post-PE patients with remaining dyspnea and/or previously known risk factors for CTEPH development were referred for blood sampling and levels of N-terminal (NT)-prohormone (pro) brain-type natriuretic peptide (BNP) were determined. Thereafter, they were referred to their local hospital for a pulmonary ventilation/perfusion (V/Q) scintigraphy and echocardiography. Approximately 45% of the V/Q-scans showed perfusion defects and 27 % of echocardiographies showed signs of pulmonary hypertension. In total, 24 cases of CTEPH were identified, resulting in a prevalence of 0.4 % (95 % confidence interval 0.2 %–0.6 %). Conclusion: An acute PE is a serious event, associated with decreased survival, multiple comorbidities, frequent dyspnea, and pathological investigational findings. The term CTEPD seems reasonable as it captures that this is a disease of the pulmonary vasculature, and that pharmacological and surgical interventions used for CTEPH may be useful. Regardless, proper follow-up after acute PE is essential for timely identification of patients in need of appropriate investigations and care.
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