| 1. |
- Bergquist, Annika, et al.
(author)
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Perinatal events and the risk of developing primary sclerosing cholangitis
- 2006
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In: World Journal of Gastroenterology. - : Baishideng Publishing Group Inc.. - 1007-9327 .- 2219-2840. ; 12:37, s. 6037-6040
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Journal article (peer-reviewed)abstract
- AIM: To investigate whether perinatal events, intrauterine or postpartum, are associated with the development of primary sclerosing cholangitis (PSC) later in life.METHODS: Birth records from 97 patients with adult PSC in Sweden were reviewed. Information on perinatal events including medications and complications during pregnancy, gestation length, birth weight and length were collected. Two control children of the same sex were selected for each subject. Conditional multiple logistic regression was used to assess associations of the perinatal measures with development of PSC.RESULTS: No significant associations were found between gestational age, birth length, breastfeeding, and the majority of medical complications including infections or medication during pregnancy for the mothers or postpartum for the children. Vaginal bleeding and peripheral oedema showed associations with PSC, with matched odds ratios of 5.70 (95% CI, 1.13-28.83) and 2.28 (95% CI, 1.04-5.03), respectively. CONCLUSION: The associations of vaginal bleeding and oedema with subsequent PSC cannot readily be explained, so our findings do not strongly support the hypothesis of a significant role of perinatal events as a risk for the development of PSC later in life.
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| 2. |
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| 3. |
- Bakker, Marije F., et al.
(author)
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Plasma carotenoids, vitamin C, tocopherols, and retinol and the risk of breast cancer in the European Prospective Investigation into Cancer and Nutrition cohort
- 2016
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In: American Journal of Clinical Nutrition. - : Elsevier BV. - 0002-9165 .- 1938-3207. ; 103:2, s. 454-464
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Journal article (peer-reviewed)abstract
- Background: Carotenoids and vitamin C are thought to be associated with reduced cancer risk because of their antioxidative capacity.Objective: This study evaluated the associations of plasma carotenoid, retinol, tocopherol, and vitamin C concentrations and risk of breast cancer.Design: In a nested case-control study within the European Prospective Investigation into Cancer and Nutrition cohort, 1502 female incident breast cancer cases were included, with an oversampling of premenopausal (n = 582) and estrogen receptor-negative (ER-) cases (n = 462). Controls (n = 1502) were individually matched to cases by using incidence density sampling. Prediagnostic samples were analyzed for alpha-carotene, beta-carotene, lycopene, lutein, zeaxanthin, beta-cryptoxanthin, retinol, alpha-tocopherol, gamma-tocopherol, and 454 vitamin C. Breast cancer risk was computed according to hormone receptor status and age at diagnosis (proxy for menopausal status) by using conditional logistic regression and was further stratified by smoking status, alcohol consumption, and body mass index (BMI). All statistical tests were 2-sided.Results: In quintile 5 compared with quintile 1, alpha-carotene (OR: 0.61; 95% CI: 0.39, 0.98) and beta-carotene (OR: 0.41; 95% CI: 0.26, 0.65) were inversely associated with risk of ER- breast tumors. The other analytes were not statistically associated with ER- breast cancer. For estrogen receptor-positive (ER+) tumors, no statistically significant associations were found. The test for heterogeneity between ER- and ER+ tumors was statistically significant only for beta-carotene (P-heterogeneity = 0.03). A higher risk of breast cancer was found for retinol in relation to ER-/progesterone receptor-negative tumors (OR: 2.37; 95% CI: 1.20, 4.67; P-heterogeneity with ER+/progesterone receptor positive = 0.06). We observed no statistically significant interaction between smoking, alcohol, or BMI and all investigated plasma analytes (based on tertile distribution).Conclusion: Our results indicate that higher concentrations of plasma beta-carotene and alpha-carotene are associated with lower breast cancer risk of ER tumors.
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| 4. |
- Benetou, V, et al.
(author)
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Mediterranean diet and incidence of hip fractures in a European cohort
- 2013
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In: Osteoporosis International. - : Springer London. - 0937-941X .- 1433-2965. ; 24:5, s. 1587-1598
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Journal article (peer-reviewed)abstract
- Prevention of hip fractures is of critical public health importance. In a cohort of adults from eight European countries, evidence was found that increased adherence to Mediterranean diet, measured by a 10-unit dietary score, is associated with reduced hip fracture incidence, particularly among men. INTRODUCTION: Evidence on the role of dietary patterns on hip fracture incidence is scarce. We explored the association of adherence to Mediterranean diet (MD) with hip fracture incidence in a cohort from eight European countries. METHODS: A total of 188,795 eligible participants (48,814 men and 139,981 women) in the European Prospective Investigation into Cancer and nutrition study with mean age 48.6 years (±10.8) were followed for a median of 9 years, and 802 incident hip fractures were recorded. Diet was assessed at baseline through validated dietary instruments. Adherence to MD was evaluated by a MD score (MDs), on a 10-point scale, in which monounsaturated were substituted with unsaturated lipids. Association with hip fracture incidence was assessed through Cox regression with adjustment for potential confounders. RESULTS: Increased adherence to MD was associated with a 7 % decrease in hip fracture incidence [hazard ratio (HR) per 1-unit increase in the MDs 0.93; 95 % confidence interval (95 % CI) = 0.89-0.98]. This association was more evident among men and somewhat stronger among older individuals. Using increments close to one standard deviation of daily intake, in the overall sample, high vegetable (HR = 0.86; 95 % CI = 0.79-0.94) and high fruit (HR = 0.89; 95 % CI = 0.82-0.97) intake was associated with decreased hip fracture incidence, whereas high meat intake (HR = 1.18; 95 % CI = 1.06-1.31) with increased incidence. Excessive ethanol consumption (HR high versus moderate = 1.74; 95 % CI = 1.32-2.31) was also a risk factor. CONCLUSIONS: In a prospective study of adults, increased adherence to MD appears to protect against hip fracture occurrence, particularly among men.
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| 5. |
- Björkman, Alva, et al.
(author)
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Accuracy and diagnostic performance of doppler echocardiography to estimate mean pulmonary artery pressure in heart failure
- 2021
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In: Echocardiography. - : John Wiley & Sons. - 0742-2822 .- 1540-8175. ; 38:9, s. 1624-1631
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Journal article (peer-reviewed)abstract
- Background: Multiple echocardiographic algorithms have been proposed to estimate mean pulmonary artery pressure (PAPM) and assess pulmonary hypertension (PH) likelihood. We assessed the accuracy of four echocardiographic approaches to estimate PAPM in heart failure (HF) patients undergoing near-simultaneous right heart catheterization (RHC), and compared diagnostic performance to identify PH with recommendation-advised tricuspid regurgitation peak velocity (TRVmax).Methods: We employed four validated echocardiographic algorithms incorporating tricuspid regurgitation peak or mean gradient, pulmonary regurgitation peak gradient, and right ventricular outflow tract acceleration time to estimate PAPM. Echocardiographic estimates of right atrial pressure were incorporated in all algorithms but one. Association and agreement with invasive PAPM were assessed. Diagnostic performance of all algorithms to identify PH was evaluated and compared with the recommended TRVmax cut-off.Results: In 112 HF patients, all echocardiographic algorithms demonstrated reasonable association (r =.41–.65; p < 0.001) and good agreement with invasive PAPM, with relatively lower mean bias and higher precision observed in algorithms that incorporated tricuspid regurgitation peak or mean gradient. All methods demonstrated strong ability to identify PH (AUC =.70–.80; p < 0.001) but did not outperform TRVmax (AUC =.84; p < 0.001). Echocardiographic estimates of right atrial pressure were falsely elevated in 30% of patients.Conclusions: Echocardiographic estimates demonstrate reasonable association with invasive PAPM and strong ability to identify PH in HF. However, none of the algorithms outperformed recommendation-advised TRVmax. The incremental value of echocardiographic estimates of right atrial pressure may need to be re-evaluated.
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| 6. |
- Chatzipanagiotou, Niki, 1975-
(author)
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Managers' Cooperative Work Practices in Computational Artefacts-Supported Library Systems
- 2021
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Doctoral thesis (other academic/artistic)abstract
- The dissertation presents understandings of the complex, contextual, cooperative everyday work practices of academic library managers supported by computational artefacts, as well as challenges disrupting their practices and thereby computational artefacts usage. The doctoral research approaches and conceptualises managers’ work as ‘everyday cooperative practice’, in this way adopting the computer-supported cooperative work (CSCW) approach. A focused-ethnographic study explores middle managers’ everyday cooperative work practices in two academic libraries, in Sweden and Australia, when using computational artefacts, including challenges experienced. The empirical data was collected through participant observations and formal and informal face-to-face interviews, as well as organizational documents review. The thematically analysed empirical material was presented as vignettes to enable complementary contextual visualisation of managers’ practices. A conceptual framework incorporated CSCW main concepts, such as cooperative work, practice, computational artefacts, situated action, articulation work, awareness, and appropriation. Placed within a managerial environment and inspired by management theories such as sensemaking and soft systems thinking, this conceptualisation serves as a reference point to explicate the research findings and achieve the research aim, to advance the understanding of managers’ everyday cooperative work practices using computational artefacts. The outcome of this dissertation illustrates the complex, contextualised, multidimensional and often diverse reality of academic library managers’ everyday cooperative work practices using computational artefacts, as well as emergent challenges that have implications for the use of computational artefacts and workplace practices. The interconnectedness of articulation work, awareness and appropriation, which emerged as a research outcome, vividly illustrates the interdependent and interrelated nature of managers’ everyday work. It extends the understanding of everyday cooperative work practices of academic library managers and provides rich analysis of their practical doing of managing and using of computational artefacts. Thus, this doctoral research generates contributions for the informatics field and, particularly, the computer-supported cooperative work (CSCW) research and, modestly, for the management and library domains.
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| 7. |
- Erhardsson, Mikael, et al.
(author)
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Acyl ghrelin increases cardiac output while preserving right ventricular-pulmonary arterial coupling in heart failure
- 2023
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In: ESC Heart Failure. - : John Wiley & Sons. - 2055-5822.
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Journal article (peer-reviewed)abstract
- AIM: Acyl ghrelin increases cardiac output (CO) in heart failure with reduced ejection fraction (HFrEF). This could impair the right ventricular-pulmonary arterial coupling (RVPAC), both through an increased venous return and right ventricular afterload. We aim to investigate if acyl ghrelin increases CO with or without worsening the right-sided haemodynamics in HFrEF assessed by RVPAC.METHODS AND RESULTS: The Karolinska Acyl ghrelin Trial was a randomized double-blind placebo-controlled trial of acyl ghrelin versus placebo (120-min intravenous infusion) in HFrEF. RVPAC was assessed echocardiographically at baseline and 120 min. ANOVA was used for difference in change between acyl ghrelin versus placebo, adjusted for baseline values. Of the 30 randomized patients, 22 had available RVPAC (acyl ghrelin n = 12, placebo n = 10). Despite a 15% increase in CO in the acyl ghrelin group (from 4.0 (3.5-4.6) to 4.6 (3.9-6.1) L/min, P = 0.003), RVPAC remained unchanged; 5.9 (5.3-7.6) to 6.3 (4.8-7.5) mm·(m/s)-1 , P = 0.372, while RVPAC was reduced in the placebo group, 5.2 (4.3-6.4) to 4.8 (4.2-5.8) mm·(m/s)-1 , P = 0.035. Comparing change between groups, CO increased in the acyl ghrelin group versus placebo (P = 0.036) while RVPAC and the right ventricular pressure gradient remained unchanged.CONCLUSION: Treatment with acyl ghrelin increases CO while preserving or even improving RVPAC in HFrEF, possibly due to increased contractility, reduced PVR and/or reduced left sided filling pressures. These potential effects strengthen the role of acyl ghrelin therapy in HFrEF with right ventricular failure.
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| 8. |
- Eussen, Simone JPM, et al.
(author)
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Plasma folate, related genetic variants, and colorectal cancer risk in EPIC
- 2010
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In: Cancer Epidemiology, Biomarkers and Prevention. - 1055-9965 .- 1538-7755. ; 19:5, s. 1328-1340
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Journal article (peer-reviewed)abstract
- Findings of the present study tend to weaken the evidence that folate plays an important role in CRC carcinogenesis. However, larger sample sizes are needed to adequately address potential gene-environment interactions.
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| 9. |
- Golec, Ewelina, et al.
(author)
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Alternative splicing encodes functional intracellular CD59 isoforms that mediate insulin secretion and are down-regulated in diabetic islets
- 2022
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In: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences (PNAS). - 0027-8424 .- 1091-6490. ; 119:24
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Journal article (peer-reviewed)abstract
- Human pancreatic islets highly express CD59, which is a glycosylphosphatidylinositol (GPI)-anchored cell-surface protein and is required for insulin secretion. How cell-surface CD59 could interact with intracellular exocytotic machinery has so far not been described. We now demonstrate the existence of CD59 splice variants in human pancreatic islets, which have unique C-terminal domains replacing the GPI-anchoring signal sequence. These isoforms are found in the cytosol of beta-cells, interact with SNARE proteins VAMP2 and SNAP25, colocalize with insulin granules, and rescue insulin secretion in CD59-knockout (KO) cells. We therefore named these isoforms IRIS-1 and IRIS-2 (Isoforms Rescuing Insulin Secretion 1 and 2). Antibodies raised against each isoform revealed that expression of both IRIS-1 and IRIS-2 is significantly lower in islets isolated from human type 2 diabetes (T2D) patients, as compared to healthy controls. Further, glucotoxicity induced in primary, healthy human islets led to a significant decrease of IRIS-1 expression, suggesting that hyperglycemia (raised glucose levels) and subsequent decreased IRIS-1 expression may contribute to relative insulin deficiency in T2D patients. Similar isoforms were also identified in the mouse CD59B gene, and targeted CRISPR/Cas9-mediated knockout showed that these intracellular isoforms, but not canonical CD59B, are involved in insulin secretion from mouse beta-cells. Mouse IRIS-2 is also down-regulated in diabetic db/db mouse islets. These findings establish the endogenous existence of previously undescribed non-GPI-anchored intracellular isoforms of human CD59 and mouse CD59B, which are required for normal insulin secretion.
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