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Sökning: WFRF:(Ström Johan)

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  • Eriksson, Daniel, et al. (författare)
  • GWAS for autoimmune Addison’s disease identifies multiple risk loci and highlights AIRE in disease susceptibility
  • 2021
  • Ingår i: Nature Communications. - : Nature Publishing Group. - 2041-1723. ; 12:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Autoimmune Addison's disease (AAD) is characterized by the autoimmune destruction of the adrenal cortex. Low prevalence and complex inheritance have long hindered successful genetic studies. We here report the first genome-wide association study on AAD, which identifies nine independent risk loci (P < 5 × 10-8). In addition to loci implicated in lymphocyte function and development shared with other autoimmune diseases such as HLA, BACH2, PTPN22 and CTLA4, we associate two protein-coding alterations in Autoimmune Regulator (AIRE) with AAD. The strongest, p.R471C (rs74203920, OR = 3.4 (2.7-4.3), P = 9.0 × 10-25) introduces an additional cysteine residue in the zinc-finger motif of the second PHD domain of the AIRE protein. This unbiased elucidation of the genetic contribution to development of AAD points to the importance of central immunological tolerance, and explains 35-41% of heritability (h2). 
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  • Malinovschi, Andrei, 1978-, et al. (författare)
  • Consequences of Using Post- or Prebronchodilator Reference Values in Interpreting Spirometry
  • 2023
  • Ingår i: American Journal of Respiratory and Critical Care Medicine. - : American Thoracic Society. - 1073-449X .- 1535-4970. ; 208:4, s. 461-471
  • Tidskriftsartikel (refereegranskat)abstract
    • RATIONALE: Post-bronchodilator (BD) spirometry is used for diagnosis of chronic obstructive pulmonary disease (COPD). However, pre-BD reference values are used for spirometry interpretation.OBJECTIVES: To compare the resulting prevalence rates of abnormal spirometry and study the consequences of using pre- or post-BD reference values generated within the Swedish CArdioPulmonary bioImage Study (SCAPIS) when interpreting post-BD spirometry in a general population.METHODS: SCAPIS reference values for post-BD and pre-BD spirometry were based on 10,156 and 1,498 never-smoking, healthy participants, respectively. We studied the associations of abnormal spirometry, defined by using pre- or post-BD reference values, with respiratory burden in the SCAPIS general population (28,851 individuals).MEASUREMENTS AND MAIN RESULTS: Bronchodilation resulted in higher predicted median and lower limit of normal (LLN) for FEV1/FVC ratio. The prevalence of post-BD FEV1/FVC < pre-bronchodilator LLN was 4.8% and that of post-BD FEV1/FVC < post-bronchodilator LLN was 9.9% for the general population. An additional 5.1% was identified as having an abnormal post-BD FEV1/FVC ratio and this group had more respiratory symptoms, emphysema (13.5% vs. 4.1%, p<0.001) and self-reported physician-diagnosed COPD (2.8% vs. 0.5%, p<0.001) than subjects with post-BD FEV1/FVC ratio > LLN for both pre- and post-bronchodilation).CONCLUSIONS: Pre- and post-bronchodilator spirometry reference values differ with regard to FEV1/FVC ratio. Use of post-bronchodilator reference values doubled the population prevalence of airflow obstruction; this was related to a higher respiratory burden. Using post-bronchodilator reference values when interpreting post-bronchodilator spirometry might enable identification of individuals with mild disease and be clinically relevant.
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  • Ström, Edvin, 1992-, et al. (författare)
  • Dissatisfaction with teeth in type 2 diabetes is associated with increased risk of cardiovascular disease
  • 2022
  • Ingår i: Diabetes Epidemiology and Management. - : Elsevier. - 2666-9706. ; 8
  • Tidskriftsartikel (refereegranskat)abstract
    • Background and aimPoor dental health status has been linked to increased risk of cardiovascular events in type 2 diabetes (T2D). Less is known about self-perceived dental health and cardiovascular risk. Our aim with this study was to investigate this association.MethodsRecruitment of T2D patients took place between 2005 and 2008 in Swedish primary care. Teeth satisfaction was assessed by questionnaire at baseline. The major adverse cardiovascular events (MACE) in this study were hospitalization due to myocardial infarction, stroke or cardiovascular death. Cox regression models were used.ResultsOut of 761 participants 601 had complete data. Ninety-two MACEs occurred (median follow-up time: 11.6 years). Those satisfied with their teeth (n = 458) had 61 events (1.2 events per 100 person-years), while those dissatisfied with teeth (n = 143) had 31 events (2.2 events per 100 person-years). Dissatisfaction with teeth was associated with an increased risk of MACE independent of age, sex and levels of CRP (HR 1.85, 95% CI 1.20 – 2.86).ConclusionsIn patients with T2D, dissatisfaction with teeth was associated with increased risk of MACE and may be considered as a marker of risk.
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  • Zavalis, Tommy, et al. (författare)
  • Mechanistic Model with Empirical Pitting Onset Approach for Detailed and Efficient Virtual Analysis of Atmospheric Bimetallic Corrosion
  • 2023
  • Ingår i: Materials. - : MDPI. - 1996-1944 .- 1996-1944. ; 16:3
  • Tidskriftsartikel (refereegranskat)abstract
    • A mechanistic model of atmospheric bimetallic corrosion with a simplified empirical approach to the onset of localized corrosion attacks is presented. The model was built for a typical bimetallic sample containing aluminum alloy 1050 and stainless steel 316L sheets. A strategy was developed that allowed the model to be calibrated against the measured galvanic current, geometrical corrosion attack properties, and corrosion products. The pitting-onset simplification sets all pits to be formed at a position near the nobler metal and treated all pits as being of the same shape and size. The position was based on the location of the highest pitting events and the pit attributes on an average of the deepest pits. For 5 h exposure at controlled RH (85%, 91%, and 97%) and salt load (86 μg NaCl/cm2), the model was shown to be promising: both for analysis of local bimetallic corrosion chemistry, such as pH and corrosion products, and for efficient assessment of pitting damage by computing a single largest pit depth. Parametric studies indicated that the pitting-onset approximation deviated the most at the beginning of exposure and when RH was below 91%. © 2023 by the authors.
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  • Aamaas, Borgar, et al. (författare)
  • Elemental carbon deposition to Svalbard snow from Norwegian settlements and long-range transport
  • 2011
  • Ingår i: Tellus. Series B, Chemical and physical meteorology. - : Stockholm University Press. - 0280-6509 .- 1600-0889. ; 63:3, s. 340-351
  • Tidskriftsartikel (refereegranskat)abstract
    • The impact on snow pack albedo from local elemental carbon (EC) sources in Svalbard has been investigated for the winter of 2008. Highly elevated EC concentrations in the snow are observed around the settlements of Longyearbyen and Svea (locally > 1000 ng g(-1), about 200 times over the background level), while EC concentrations similar to the background level are seen around Ny-Alesund. Near Longyearbyen and Svea, darkened snow influenced by wind transported coal dust from open coal stockpiles is clearly visible from satellite images and by eye at the ground. As a first estimate, the reduction in snow albedo caused by local EC pollution from the Norwegian settlements has been compared to the estimated reduction caused by long-range transported EC for entire Svalbard. The effect of local EC from Longyearbyen, Svea and all Norwegian settlements are estimated to 2.1%, 7.9% and 10% of the total impact of EC, respectively. The EC particles tend to stay on the surface during melting, and elevated EC concentrations due to the spring melt was observed. This accumulation of EC enhances the positive albedo feedbacks. The EC concentrations were observed to be larger in metamorphosed snow than in fresh snow, and especially around ice lenses.
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