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Sökning: WFRF:(Svensson Mikael A.)

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1.
  • Zamora, Juan Carlos, et al. (författare)
  • Considerations and consequences of allowing DNA sequence data as types of fungal taxa
  • 2018
  • Ingår i: IMA Fungus. - : INT MYCOLOGICAL ASSOC. - 2210-6340 .- 2210-6359. ; 9:1, s. 167-185
  • Tidskriftsartikel (refereegranskat)abstract
    • Nomenclatural type definitions are one of the most important concepts in biological nomenclature. Being physical objects that can be re-studied by other researchers, types permanently link taxonomy (an artificial agreement to classify biological diversity) with nomenclature (an artificial agreement to name biological diversity). Two proposals to amend the International Code of Nomenclature for algae, fungi, and plants (ICN), allowing DNA sequences alone (of any region and extent) to serve as types of taxon names for voucherless fungi (mainly putative taxa from environmental DNA sequences), have been submitted to be voted on at the 11th International Mycological Congress (Puerto Rico, July 2018). We consider various genetic processes affecting the distribution of alleles among taxa and find that alleles may not consistently and uniquely represent the species within which they are contained. Should the proposals be accepted, the meaning of nomenclatural types would change in a fundamental way from physical objects as sources of data to the data themselves. Such changes are conducive to irreproducible science, the potential typification on artefactual data, and massive creation of names with low information content, ultimately causing nomenclatural instability and unnecessary work for future researchers that would stall future explorations of fungal diversity. We conclude that the acceptance of DNA sequences alone as types of names of taxa, under the terms used in the current proposals, is unnecessary and would not solve the problem of naming putative taxa known only from DNA sequences in a scientifically defensible way. As an alternative, we highlight the use of formulas for naming putative taxa (candidate taxa) that do not require any modification of the ICN.
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2.
  • Gad, Helge, et al. (författare)
  • MTH1 inhibition eradicates cancer by preventing sanitation of the dNTP pool
  • 2014
  • Ingår i: Nature. - : Nature Publishing Group. - 0028-0836 .- 1476-4687. ; 508:7495, s. 215-221
  • Tidskriftsartikel (refereegranskat)abstract
    • Cancers have dysfunctional redox regulation resulting in reactive oxygen species production, damaging both DNA and free dNTPs. The MTH1 protein sanitizes oxidized dNTP pools to prevent incorporation of damaged bases during DNA replication. Although MTH1 is non-essential in normal cells, we show that cancer cells require MTH1 activity to avoid incorporation of oxidized dNTPs, resulting in DNA damage and cell death. We validate MTH1 as an anticancer target in vivo and describe small molecules TH287 and TH588 as first-in-class nudix hydrolase family inhibitors that potently and selectively engage and inhibit the MTH1 protein in cells. Protein co-crystal structures demonstrate that the inhibitors bindin the active site of MTH1. The inhibitors cause incorporation of oxidized dNTPs in cancer cells, leading to DNA damage, cytotoxicity and therapeutic responses in patient-derived mouse xenografts. This study exemplifies the non-oncogene addiction concept for anticancer treatment and validates MTH1 as being cancer phenotypic lethal.
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3.
  • Fantini, R, et al. (författare)
  • EU FP7 INFSO-ICT-317669 METIS, D3.2 First performance results for multi-node/multi-antenna transmission technologies
  • 2014
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This deliverable describes the current results of the multi-node/multi-antenna technologies investigated within METIS and analyses the interactions within and outside Work Package 3. Furthermore, it identifies the most promising technologies based on the current state of obtained results. This document provides a brief overview of the results in its first part. The second part, namely the Appendix, further details the results, describes the simulation alignment efforts conducted in the Work Package and the interaction of the Test Cases. The results described here show that the investigations conducted in Work Package 3 are maturing resulting in valuable innovative solutions for future 5G systems.
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4.
  • Syväjärvi, Mikael, et al. (författare)
  • Cubic silicon carbide as a potential photovoltaic material
  • 2016
  • Ingår i: Solar Energy Materials and Solar Cells. - : Elsevier. - 0927-0248 .- 1879-3398. ; 145, s. 104-108
  • Tidskriftsartikel (refereegranskat)abstract
    • In this work we present a significant advancement in cubic silicon carbide (3C-SiC) growth in terms of crystal quality and domain size, and indicate its potential use in photovoltaics. To date, the use of 3C-SiC for photovoltaics has not been considered due to the band gap of 2.3 eV being too large for conventional solar cells. Doping of 3C-SiC with boron introduces an energy level of 0.7 eV above the valence band. Such energy level may form an intermediate band (IB) in the band gap. This IB concept has been presented in the literature to act as an energy ladder that allows absorption of sub-bandgap photons to generate extra electron-hole pairs and increase the efficiency of a solar cell. The main challenge with this concept is to find a materials system that could realize such efficient photovoltaic behavior. The 3C-SiC bandgap and boron energy level fits nicely into the concept, but has not been explored for an IB behavior. For a long time crystalline 3C-SiC has been challenging to grow due to its metastable nature. The material mainly consists of a large number of small domains if the 3C polytype is maintained. In our work a crystal growth process was realized by a new approach that is a combination of initial nucleation and step-flow growth. In the process, the domains that form initially extend laterally to make larger 3C-SiC domains, thus leading to a pronounced improvement in crystalline quality of 3C-SiC. In order to explore the feasibility of IB in 3C-SiC using boron, we have explored two routes of introducing boron impurities; ion implantation on un-doped samples and epitaxial growth on un-doped samples using pre-doped source material. The results show that 3C-SiC doped with boron is an optically active material, and thus is interesting to be further studied for IB behavior. For the ion implanted samples the crystal quality was maintained even after high implantation doses and subsequent annealing. The same was true for the samples grown with pre-doped source material, even with a high concentration of boron impurities. We present optical emission and absorption properties of as-grown and boron implanted 3C-SiC. The low-temperature photoluminescence spectra indicate the formation of optically active deep boron centers, which may be utilized for achieving an IB behavior at sufficiently high dopant concentrations. We also discuss the potential of boron doped 3C-SiC base material in a broader range of applications, such as in photovoltaics, biomarkers and hydrogen generation by splitting water.
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5.
  • Carvalho, E. de, et al. (författare)
  • EU FP7 INFSO-ICT-317669 METIS, D3.1 Positioning of multi-node/multi-antenna technologies
  • 2013
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This document describes the research activity in multi-node/multi-antenna technologies within METIS and positions it with respect to the state-of-the-art in the academic literature and in the standardization bodies. Based on the state-of-the-art and as well as on the METIS objectives,we set the research objectives and we group the different activities (or technology components) into research clusters with similar research objectives. The technologycomponents and the research objectives have been set to achieve an ambidextrous purpose. On one side we aim at providing the METIS system with those technological components that are a natural but non-trivial evolution of 4G. On the other side, we aim at seeking for disruptivetechnologies that could radically change 5G with respect to 4G. Moreover, we mapped the different technology components to METIS’ other activities and to the overall goals of theproject.
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6.
  • Galeckas, A., et al. (författare)
  • Optical and microstructural investigation of heavy B-doping effects in sublimation-grown 3C-SiC
  • 2018
  • Ingår i: Materials Science Forum. - : Trans Tech Publications Ltd. - 9783035711455 ; , s. 221-224
  • Konferensbidrag (refereegranskat)abstract
    • In this work, a complementary microstructural and optical approach is used to define processing conditions favorable for the formation of deep boron-related acceptor centers that may provide a pathway for achieving an intermediate band behavior in highly B-doped 3C-SiC. The crystallinity, boron solubility and precipitation mechanisms in sublimation-grown 3C-SiC crystals implanted to 1-3 at.% B concentrations were investigated by STEM. The revealed defect formation and boron precipitation trends upon thermal treatment in the range 1100-2000oC have been crosscorrelated with the optical characterization results provided by imaging PL spectroscopy. We discuss optical activity of the implanted B ions in terms of both shallow acceptors and deep D-centers, a complex formed by a boron atom and a carbon vacancy, and associate the observed spectral developments upon annealing with the strong temperature dependence of the D-center formation efficiency, which is further enhanced by the presence of implantation-induced defects. © 2018 Trans Tech Publications, Switzerland.
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7.
  • Sellgren, C. M., et al. (författare)
  • GRK3 deficiency elicits brain immune activation and psychosis
  • 2021
  • Ingår i: Molecular Psychiatry. - : Springer Science and Business Media LLC. - 1359-4184 .- 1476-5578. ; 26, s. 6820-6832
  • Tidskriftsartikel (refereegranskat)abstract
    • The G protein-coupled receptor kinase (GRK) family member protein GRK3 has been linked to the pathophysiology of schizophrenia and bipolar disorder. Expression, as well as protein levels, of GRK3 are reduced in post-mortem prefrontal cortex of schizophrenia subjects. Here, we investigate functional behavior and neurotransmission related to immune activation and psychosis using mice lacking functional Grk3 and utilizing a variety of methods, including behavioral, biochemical, electrophysiological, molecular, and imaging methods. Compared to wildtype controls, the Grk3(-/-) mice show a number of aberrations linked to psychosis, including elevated brain levels of IL-1 beta, increased turnover of kynurenic acid (KYNA), hyper-responsiveness to D-amphetamine, elevated spontaneous firing of midbrain dopamine neurons, and disruption in prepulse inhibition. Analyzing human genetic data, we observe a link between psychotic features in bipolar disorder, decreased GRK expression, and increased concentration of CSF KYNA. Taken together, our data suggest that Grk3(-/-) mice show face and construct validity relating to the psychosis phenotype with glial activation and would be suitable for translational studies of novel immunomodulatory agents in psychotic disorders.
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8.
  • Dedering, Asa, et al. (författare)
  • The Effects of Neck-Specific Training Versus Prescribed Physical Activity on Pain and Disability in Patients With Cervical Radiculopathy: A Randomized Controlled Trial
  • 2018
  • Ingår i: Archives of Physical Medicine and Rehabilitation. - : W B SAUNDERS CO-ELSEVIER INC. - 0003-9993 .- 1532-821X. ; 99:12, s. 2447-2456
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To compare the effects of a neck-specific training program to prescribed physical activity with both groups receiving a cognitive behavioral approach, on pain and disability in patients with cervical radiculopathy (CR). Design: Parallel-group randomized clinical trial with follow-up at 3, 6, 12, and 24 months. Setting: Recruitment and assessments of participants were performed at a university hospital. Interventions were performed in primary care setting at outpatient physiotherapy clinics. Participants: Patients (N=144) with CR were recruited to participate in this clinical trial. Interventions: Patients were randomly assigned to 3 months of either of a neck-specific training program or prescribed physical activity. Main Outcome Measures: Primary outcomes included self-rated neck and arm pain as collected by the visual analog scale (VAS). Secondary outcomes were self-rated headache measured with the VAS, the Neck Disability Index, the EuroQol 5D, the Fear Avoidance Beliefs Questionnaire, and the Hospital Anxiety and Depression Scale. Assessments were performed at baseline and at 3-, 6-, 12-, and 24-month follow-up periods. Results: Intention-to-treat and per-protocol analyses showed no significant interaction (group x time) or group effects. There were, however, significant time effects indicating improvement over time for both groups for all outcomes except for levels of depression. Conclusions: The study revealed that neck-specific training as well as prescribed physical activity both including additional cognitive behavioral approach decreased the pain in patients with CR, that is, participants improved regardless of the intervention received. There is a lack of consensus of how to best manage individuals with CR. However, our findings suggest that CR has a natural favorable long-term outcome when patients are prescribed neck-specific training and exercise in combination with a behavioral approach. (C) 2018 by the American Congress of Rehabilitation Medicine
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9.
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10.
  • Lilja, Mikael, et al. (författare)
  • Determinants of HbA1c in patients with type 1 diabetes in seven Swedish county councils
  • 2015
  • Ingår i: Diabetologia. - : Springer. - 0012-186X .- 1432-0428. ; 58:Suppl. 1 Abstr. 278, s. S140-S141
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Background and aims: In order to make fair comparisons between the results of different health care providers, proper consideration of the casemix of the populations they serve is important. HbA1c is often used as a metric to indicate the quality of diabetes care, it is therefore of value to determine what patient characteristics affect this outcome. As part of the ongoing National Collaboration for Value Based Reimbursement and Monitoring Systems, we therefore set out to investigate what factors are associated with HbA1c in a large retrospective cohort of persons with type 1 diabetes.Materials and methods: This was a retrospective register study where we analyzed persons 18 years or older, with a health care contact and a diagnosis of diabetes during 2010-11 in the administrative systems of seven Swedish county councils (Dalarna, Jämtland Härjedalen, Skåne, Stockholm, Uppsala, Västra Götaland and Östergötland), covering ~70% of the Swedish population and linked this data to data from the National Diabetes Register, socioeconomic data from Statistics Sweden and data on filled prescriptions from the Prescribed Drug Register. We estimated a random effect model on HbA1c after one year of follow-up, including socioeconomic, demographic and clinical factors.Results: Based on a complete case approach, 13 396 patients were analyzed. Women had on average higher HbA1c than men. Blood sugar control seemed to be better with higher age. Of the socioeconomic factors, higher education was associated with lower levels of HbA1c, as was being married. By contrast, we found no association between HbA1c and being born outside the EU.Ahistory (previous 2 years) of diabetes related complications were associated with higher levels of HbA1c, which is likely due to high levels of HbA1c being an indicator of what is causing the complications in the first place. The exception to this pattern was patients with renal failure.Conclusion: Apart from obvious demographic factors such as age and gender as well as disease history, educational and civil status are important factors to take into consideration when comparing obtained HbA1c levels between health care providers. This also raises the question of the need for additional focus on education directed towards these groups to facilitate improved diabetes management.
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11.
  • Power, R. A., et al. (författare)
  • Fecundity of Patients With Schizophrenia, Autism, Bipolar Disorder, Depression, Anorexia Nervosa, or Substance Abuse vs Their Unaffected Siblings
  • 2013
  • Ingår i: Jama Psychiatry. - : American Medical Association (AMA). - 2168-622X .- 2168-6238. ; 70:1, s. 22-30
  • Tidskriftsartikel (refereegranskat)abstract
    • Context: It is unknown how genetic variants conferring liability to psychiatric disorders survive in the Objectives: To examine the reproductive fitness of patients with schizophrenia and other psychiatric Design: We measured the fecundity of patients with schizophrenia, autism, bipolar disorder, Setting: Population databases in Sweden, including the Multi-Generation Register and the Swedish Participants: In total, 2.3million individuals among the 1950 to 1970 birth cohort in Sweden. Main Outcome Measures: Fertility ratio (FR), reflecting the mean number of children compared with Results: Except for women with depression, affected patients had significantly fewer children (FR range Conclusions: Our results suggest that strong selection exists against schizophrenia, autism, and
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12.
  • Svensson, L., et al. (författare)
  • Comparison of very early treatment with either fibrinolysis or percutaneous coronary intervention facilitated with abciximab with respect to ST recovery and infarct-related artery epicardial flow in patients with acute ST-segment elevation myocardial infarction: the Swedish Early Decision (SWEDES) reperfusion trial
  • 2006
  • Ingår i: Am Heart J. - : Mosby, Inc.. - 1097-6744 .- 0002-8703. ; 151:4
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Results from a number of studies indicate that primary percutaneous coronary intervention (PCI) is superior to fibrinolysis for treatment of acute ST-elevation myocardial infarction. Modern adjunctive antithrombotic treatment with systematic use of low-molecular-weight heparins, fibrin-specific thrombolysis, and glycoprotein IIb/IIIa receptor inhibitors may improve the outcome compared with what was achieved in previous studies. METHODS: Patients with ST-elevation myocardial infarction were randomized to receive enoxaparin followed by reteplase (group A; n = 104) or enoxaparin followed by abciximab and transfer to invasive center for optional PCI (group B; n = 101). Primary end points were ST-segment resolution 120 minutes and TIMI flow at coronary angiography 5 to 7 days after randomization. RESULTS: Forty-two percent of the patients started therapy in the prehospital phase. Time from symptom to treatment was 114 minutes in group A and 202 minutes in group B. Baseline characteristics were similar in the 2 groups. Sixty-four percent in group A and 68% in group B had ST resolution of > 50% at 120 minutes (not significant). At control angiography, 54% in the fibrinolytic group and 71% in the invasive group had TIMI 3 flow (P = .04). At 30 days, the composite of death, stroke, or reinfarction occurred in 8% in the fibrinolytic group compared with 3% in the invasive group (not significant). CONCLUSIONS: Despite much shorter time delay to start of fibrinolysis than PCI, this did not result in signs of superior myocardial reperfusion. Epicardial flow in the infarct-related artery was better after invasive therapy, and there was a trend toward better clinical outcome after this treatment compared with after fibrinolysis.
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13.
  • Wittchen, H U, et al. (författare)
  • The size and burden of mental disorders and other disorders of the brain in Europe 2010.
  • 2011
  • Ingår i: European neuropsychopharmacology : the journal of the European College of Neuropsychopharmacology. - : Elsevier BV. - 1873-7862 .- 0924-977X. ; 21:9, s. 655-79
  • Tidskriftsartikel (refereegranskat)abstract
    • To provide 12-month prevalence and disability burden estimates of a broad range of mental and neurological disorders in the European Union (EU) and to compare these findings to previous estimates. Referring to our previous 2005 review, improved up-to-date data for the enlarged EU on a broader range of disorders than previously covered are needed for basic, clinical and public health research and policy decisions and to inform about the estimated number of persons affected in the EU.
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14.
  • Aasa, M., et al. (författare)
  • Temporal changes in TIMI myocardial perfusion grade in relation to epicardial flow, ST-resolution and left ventricular function after primary percutaneous coronary intervention
  • 2007
  • Ingår i: Coron Artery Dis. - 0954-6928. ; 18:7, s. 513-518
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Myocardial perfusion at the end of reperfusion therapy assessed angiographically with thrombolysis in myocardial infarction (TIMI) myocardial perfusion grade (TMPG) has been associated with recovery of left ventricular (LV) function and survival. The aim of this analysis was to study the evolution of TMPG within the first week following primary percutaneous coronary intervention (PCI) and its association with ECG-derived ST-segment resolution (STRES) and recovery of LV function. METHODS: A total of 76 patients with acute myocardial infarction were pretreated with enoxaparine and abciximab and subjected to primary PCI within a prospective study and evaluated with TMPG assessed on coronary angiography at the end of the procedure and after 5-7 days. STRES was evaluated at 120 min post inclusion and global LV function was assessed by echocardiography after 30 days. RESULTS: Reperfusion (TIMI flow 2-3) was reached in all patients. Forty one percent had 'open myocardium' (i.e. TMPG 2 or 3) after PCI, a number that increased to 61% after 5-7 days (P=0.003). STRES >50% was reached in 73% of the patients and there was a good correlation between TMPG and STRES. Furthermore, those who improved from 'closed' to 'open myocardium' had higher STRES (and similar to those with 'open myocardium' already post-PCI) than those who had 'closed myocardium' at both occasions (80 vs. 52%, P=0.012). CONCLUSION: A significant increase was found in the number of patients with 'open myocardium' within the first week post-primary PCI and STRES seems to predict this improvement.
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15.
  • Andersson, H., et al. (författare)
  • Valuation of small and multiple health risks: A critical analysis of SP data applied to food and water safety
  • 2016
  • Ingår i: Journal of Environmental Economics and Management. - : Elsevier BV. - 0095-0696 .- 1096-0449. ; 75, s. 41-53
  • Tidskriftsartikel (refereegranskat)abstract
    • This study elicits individual risk preferences in the context of an infectious disease using choice experiments. A main objective is to examine scope sensitivity using a novel approach. Our results suggest that the value of a mortality risk reduction (VSL) is highly sensitive to the survey design. Our results cast doubt on the standard scope sensitivity tests in choice experiments, but also on the validity and reliability of VSL estimates based on stated-preference studies in general. This is important due to the large empirical literature on non-market evaluation and the elicited values' central role in policy making. (C) 2015 Elsevier Inc. All rights reserved.
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16.
  • Antonakoglou, Konstantinos, et al. (författare)
  • On the needs and requirements arising from connected and automated driving
  • 2020
  • Ingår i: Journal of Sensor and Actuator Networks. - : MDPI AG. - 2224-2708. ; 9:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Future 5G systems have set a goal to support mission-critical Vehicle-to-Everything (V2X) communications and they contribute to an important step towards connected and automated driving. To achieve this goal, the communication technologies should be designed based on a solid understanding of the new V2X applications and the related requirements and challenges. In this regard, we provide a description of the main V2X application categories and their representative use cases selected based on an analysis of the future needs of cooperative and automated driving. We also present a methodology on how to derive the network related requirements from the automotive specific requirements. The methodology can be used to analyze the key requirements of both existing and future V2X use cases.
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17.
  • Badam, Tejaswi, et al. (författare)
  • CD4(+) T-cell DNA methylation changes during pregnancy significantly correlate with disease-associated methylation changes in autoimmune diseases
  • 2022
  • Ingår i: Epigenetics. - : Taylor & Francis Group. - 1559-2294 .- 1559-2308. ; 17:9, s. 1040-1055
  • Tidskriftsartikel (refereegranskat)abstract
    • Epigenetics may play a central, yet unexplored, role in the profound changes that the maternal immune system undergoes during pregnancy and could be involved in the pregnancy-induced modulation of several autoimmune diseases. We investigated changes in the methylome in isolated circulating CD4(+) T-cells in non-pregnant and pregnant women, during the 1(st) and 2(nd) trimester, using the Illumina Infinium Human Methylation 450K array, and explored how these changes were related to autoimmune diseases that are known to be affected during pregnancy. Pregnancy was associated with several hundreds of methylation differences, particularly during the 2(nd) trimester. A network-based modular approach identified several genes, e.g., CD28, FYN, VAV1 and pathways related to T-cell signalling and activation, highlighting T-cell regulation as a central component of the observed methylation alterations. The identified pregnancy module was significantly enriched for disease-associated methylation changes related to multiple sclerosis, rheumatoid arthritis and systemic lupus erythematosus. A negative correlation between pregnancy-associated methylation changes and disease-associated changes was found for multiple sclerosis and rheumatoid arthritis, diseases that are known to improve during pregnancy whereas a positive correlation was found for systemic lupus erythematosus, a disease that instead worsens during pregnancy. Thus, the directionality of the observed changes is in line with the previously observed effect of pregnancy on disease activity. Our systems medicine approach supports the importance of the methylome in immune regulation of T-cells during pregnancy. Our findings highlight the relevance of using pregnancy as a model for understanding and identifying disease-related mechanisms involved in the modulation of autoimmune diseases.
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18.
  • Björk, Anna, et al. (författare)
  • Type 1 diabetes mellitus and associated risk factors in patients with or without CHD: a case-control study
  • 2017
  • Ingår i: Cardiology in the Young. - : Cambridge University Press (CUP). - 1047-9511 .- 1467-1107. ; 27:9, s. 1670-1677
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Approximately 1% of children are born with CHD, and 90-95% reach adulthood. Increased exposure to infections and stress-strain can contribute to an increased risk of developing type 1 diabetes mellitus. CHD may increase the risk of more serious infections, stress-strain, and increased risk of developing type 1 diabetes mellitus. Methods: We analysed the onset of and the risk of mortality and morbidity associated with concurrent CHD in patients with type 1 diabetes mellitus compared with patients with type 1 diabetes mellitus without CHD. The study combined data from the National Diabetes Register and the National Patient Register. Results: A total of 104 patients with CHD and type 1 diabetes mellitus were matched with 520 controls. Patients with CHD and type 1 diabetes mellitus had an earlier onset of diabetes (13.9 versus 17.4 years, p < 0.001), longer duration of diabetes (22.4 versus 18.1 years, p < 0.001), higher prevalence of retinopathy (64.0 versus 43.0%, p = 0.003), higher creatinine levels (83.5 versus 74.1 mu mol/L, p = 0.03), higher mortality (16 versus 5%, p = 0.002), and after onset of type 1 diabetes mellitus higher rates of co-morbidity (5.28 versus 3.18, p <= 0.01), heart failure (9 versus 2%, p = 0.02), and stroke (6 versus 2%, p = 0.048) compared with controls. Conclusions: From a nationwide register of patients with type 1 diabetes mellitus, the coexistence of CHD and type 1 diabetes mellitus was associated with an earlier onset, a higher frequency of microvascular complications, co-morbidity, and mortality.
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19.
  • Brisslert, Mikael, 1974, et al. (författare)
  • S100A4 regulates the Src-tyrosine kinase dependent differentiation of Th17 cells in rheumatoid arthritis
  • 2014
  • Ingår i: Biochimica Et Biophysica Acta-Molecular Basis of Disease. - : Elsevier BV. - 0925-4439. ; 1842:11, s. 2049-2059
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: To evaluate the role of S100A4, a calcium-binding regulator of nonmuscle myosin assembly, for T-cell responses in rheumatoid arthritis. Methods: Arthritis was induced in the methylated bovine serum albumin (mBSA)-immunized mice lacking the entire S100A4 protein (S100A4KO) and in wild-type counterparts treated with short hairpin ribonucleic acid (shRNA)-lentiviral constructs targeting S100A4 (S100A4-shRNA). The severity of arthritis was evaluated morphologically. T-cell subsets were characterized by the expression of master transcription factors, and functionally by proliferation activity and cytokine production. The activity of the Scr-kinases Fyn and Lck was assessed by the autophosphorylation of C-terminal thyrosine and by the phosphorylation of the CD5 cytodomain. The interaction between S100A4 and the CD5 cytodomain was analysed by nuclear magnetic resonance spectrophotometry. Results: S100A4-deficient mice (S100A4KO and S100A4-shRNA) had significantly alleviated morphological signs of arthritis and joint damage. Leukocyte infiltrates in the arthritic joints of S100A4-deficient mice accumulated Foxp3(+) Treg cells, while the number of ROR gamma t(+) and (pTyr705)STAT3(+) cells was reduced. S100A4-deficient mice had a limited formation of Th17-cells with low retinoic acid orphan receptor gamma t (ROR gamma t) mRNA and IL17 production in T-cell cultures. S100A4-deficient mice had a low expression and activity of T-cell receptor (TCR) inhibitor CD5 and low (pTyr705)STAT3 (signal transducer and activator of transcription 3), which led to increased (pTyr352)ZAP-70 (theta-chain associated protein kinase of 70 kDa), lymphocyte proliferation and production of IL2. In vitro experiments showed that S100A4 directly binds Lck and Fyn and reciprocally regulates their kinase activity towards the CD5 cytodomain. Spectrometry demonstrates an interaction between the CD5 cytodomain and EF2-binding sites of S100A4. Conclusion: The present. study demonstrates that S100A4 plays an important part in the pathogenesis of arthritis. It controls CD5-dependent differentiation of Th17 cells by regulating the activity of the Src-family kinases Lck and Fyn. (C) 2014 Elsevier B.V. All rights reserved.
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20.
  • Chotteau, Veronique, 1963-, et al. (författare)
  • Development of a fed-batch process for the production of a recombinant protein X in CHO-GS system : Case study from the cell to reactor process ready for pilot scale cultivation
  • 2010
  • Ingår i: Cells and Culture. - Dordrecht : Springer Science+Business Media B.V.. - 9789048134182 ; , s. 723-725
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • A new cell line was created using CHO-GS system. The most promising clones were adapted to different base cultivation media leading to the selection of one medium. The fed-batch process development was performed in spinner, shake flask and bioreactor scale. It included the selection of a feed medium, the choice of the feed strategy and the optimisation of the glucose feeding. The process was then simplified by using a single feed including the feed medium and the glucose feed. Finally up-scaling parameters like aeration and CO2 stripping were studied in 3 L and 15 L bioreactors in preparation for pilot scale operation. This process proved to be robust, reproducible and suitable for large and commercial scale operation.
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21.
  • Covacu, Ruxandra, et al. (författare)
  • Nitric oxide exposure diverts neural stem cell fate from neurogenesis towards astrogliogenesis
  • 2006
  • Ingår i: Stem Cells. - : Oxford University Press (OUP). - 1066-5099 .- 1549-4918. ; 178, s. 268-268
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Regeneration of cells in the central nervous system is a process that might be affected during neurological disease and trauma. Because nitric oxide (NO) and its derivatives are powerful mediators in the inflammatory cascade, we have investigated the effects of pathophysiological concentrations of NO on neurogenesis, gliogenesis, and the expression of proneural genes in primary adult neural stem cell cultures. After exposure to NO, neurogenesis was downregulated, and this corresponded to decreased expression of the proneural gene neurogenin-2 and beta-III-tubulin. The decreased ability to generate neurons was also found to be transmitted to the progeny of the cells. NO exposure was instead beneficial for astroglial differentiation, which was confirmed by increased activation of the Janus tyrosine kinase/signal transducer and activator of transcription transduction pathway. Our findings reveal a new role for NO during neuroinflammatory conditions, whereby its proastroglial fate-determining effect on neural stem cells might directly influence the neuroregenerative process.
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22.
  • Dellborg, Mikael, 1954, et al. (författare)
  • High mortality and morbidity among adults with congenital heart disease and type 2 diabetes
  • 2015
  • Ingår i: Scandinavian Cardiovascular Journal. - 1401-7431. ; 49:6, s. 344-350
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives. With improving prognosis the prevalence of adult congenital heart disease (ACHD) is increasing. Patients with type 2 diabetes mellitus (T2DM) have a shorter life expectancy compared with the general population. We investigated, in a large national diabetes registry, the prevalence of ACHD in combination with T2DM to estimate the associated clinical risk, outcome and patient characteristics. Design. Data from the Swedish National Diabetes Register (NDR) were linked with the Swedish National Patient Register (NPR) and the Cause of Death Register. Results. 833 ACHD patients were matched with 5 controls each. ACHD patients had significantly lower body mass index or BMI, higher creatinine and were more sedentary as compared with patients with T2DM but without congenital heart disease. The overall mortality was 26.2% for ACHD patients as compared with 19.9% (P < 0.001) for the control group, and five-year mortality rates were 5.2 versus 3.4%, P = 0.014. Conclusions. Congenital heart disease and secondary risk factors for cardiovascular disease frequently coexist and the development of T2DM also in the ACHD population is not uncommon with an estimated prevalence of between 4 and 8%. Treatment of conventional cardiovascular risk factors in patients with congenital heart disease could be considered secondary prevention given the relatively high morbidity and high risk for mortality observed in patients with the combination of ACHD and T2DM. © 2015 Informa Healthcare.
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23.
  • Fallgren, Mikael, et al. (författare)
  • Multicast and Broadcast Enablers for High-Performing Cellular V2X Systems
  • 2019
  • Ingår i: IEEE Transactions on Broadcasting. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 0018-9316 .- 1557-9611. ; 65:2, s. 454-463
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper focuses on capabilities enabled by 5G connectivity in the cooperative, connected and autonomous cars, and elaborates on two technical enablers. One of the technical enablers consists of a beamformed broadcast/multicast technology that builds on adaptive and robust beam management techniques at the air interface. The other proposed technical component aims to improve the end-to-end architectural design of 5G networks to enable efficient broadcast and multicast transmissions for vehicle-to-anything services. Finally, the key results of multicast and broadcast technical components are described and ongoing and future areas of work and research are detailed.
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24.
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25.
  • Hellström, Mikael, 1950, et al. (författare)
  • Extracolonic and incidental findings on CT colonography (virtual colonoscopy)
  • 2004
  • Ingår i: AJR Am J Roentgenol. - 0361-803X. ; 182:3, s. 631-8
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: The objective of our study was to prospectively determine the frequency and clinical importance of extracolonic findings on CT colonography in symptomatic patients. SUBJECTS AND METHODS. One hundred eleven symptomatic patients referred for colonoscopy underwent CT colonography before colonoscopy. Helical CT from the diaphragm to the symphysis was performed with the patient in the supine and prone positions after rectal air insufflation. Image interpretation was done on a digital workstation. Extracolonic findings were classified as minor, moderate, or major according to potential clinical importance. Patient records, with a follow-up time of about 3 years, were reviewed to determine final diagnoses. RESULTS: Twenty-six (23%) of the patients had CT findings of major importance such as lymphadenopathy (n = 7), aortic aneurysm (n = 6), suspected solid hepatic masses (n = 5), and suspected solid renal masses (n = 4). Fifty-eight patients (52%) had findings of moderate importance such as gallstones (n = 16), indeterminate renal masses (n = 9), adrenal masses with benign appearance (n = 8), and hiatal hernia (n = 7). Forty-six patients (41%) had no or only minor findings, such as renal cysts (n = 34), renal calcifications (n = 19), and hepatic cysts (n = 14). Review of patient records showed that CT colonography contributed to the detection of major, previously unknown extracolonic disorders in 14 (13%) of the 111 patients. CONCLUSION: Potentially important extracolonic findings were revealed in 23% of the patients, leading to additional diagnostic or therapeutic considerations. Some of these findings were clinically important, whereas others were previously known or led to unnecessary workup. This finding must be taken into account when CT colonography is considered for routine diagnostic workup or screening.
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26.
  • Huang, Yunbo, et al. (författare)
  • Coupling of Local Wood Properties Extracted from X-ray Computed Tomography with Cutting Force
  • 2023
  • Ingår i: Proceedings of the 25th International Wood Machining Seminar. - : IWMS -25 Organizing Committee.
  • Konferensbidrag (refereegranskat)abstract
    • While X-ray computed tomography (CT) is used extensively in sawmills, its primary applications are improving value-yield and process automation. Three-dimensional CT scanners have also been extensively used for log sorting and sawing optimisation. However, there is hardly any resent research utilising CT from a cutting process perspective. This study addresses this gap by adopting CT to investigate the correlation between local wood properties — namely density, knots and annual rings — and cutting forces. Cutting forces for clear-wood and knotty-wood specimens of Scots pine (Pinus sylvestris L.) followed the expected trend corresponding to the density profile: dense regions led to high cutting force while other regions caused low cutting forces. However, it was found that in addition to density, knot orientation relative to cutting direction, annual ring width along the cutting path, and annual ring angle in relation to the cutting direction were critical factors that influence the cutting process. This study illustrates the feasibility of coupling local wood properties obtained from CT data with cutting force, potentially inspiring further research on a variety of wood property/cutting force relationships.
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27.
  • Jonasson, Pall, et al. (författare)
  • The morphologic characteristics and range of motion in the hips of athletes and non-athletes
  • 2016
  • Ingår i: Journal of Hip Preservation Surgery. - : Oxford University Press (OUP). - 2054-8397. ; 3:4, s. 325-332
  • Tidskriftsartikel (refereegranskat)abstract
    • The cam deformity may cause impingement and probably leads to osteoarthritis of the hip. The aetiology of the cam deformity is incompletely understood. Vigorous training during skeletal growth can lead to the development of cam and symptoms of femoro-acetabular impingement and subsequent osteoarthritis of the hip. The purpose of this study was to compare the radiographic characteristics and range of motion between a group of athletes and a non-athletic control group. Thirty-two male athletes (17 soccer players and 15 ice-hockey players) and thirty non-athletes, used as a control group, were examined clinically and radiographically. Hip range of motion was measured and the FADIR and FABER tests were performed. Standard radiographs of both hips were taken. The centre-edge angle, alpha angle, caput-collum-diaphysis angle, head-neck offset and Tonnis grade were registered. The athletes had a higher Tonnis grade (right P = 0.009, left P = 0.004), more pain on the FADIR test (right P = 0.006, left P = 0.001) and lower ROM in internal (right P = 0.003, left P = 0.025) and external rotation (P < 0.001). A superiorly placed cam deformity (seen on an AP pelvis view) was correlated with reduced external rotation (right P = 0.001, left P = 0.004) and mild osteoarthritis (Tonnis grade 1), (P = 0.015, left P = 0.020), while a more anteriorly placed cam deformity (seen on a modified Lauenstein view) was correlated with reduced internal rotation (right P = 0.029, left P = 0.013). A lower range of motion, more osteoarthritic changes and more pain were found in the athletes than the controls. The control group had more cam deformities than previously reported.
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28.
  • Krüger, Niclas A., et al. (författare)
  • Good times are drinking times : empirical evidence on business cycles and alcohol sales in Sweden 1861-2000
  • 2010
  • Ingår i: Applied Economics Letters. - Oxfordshire: United Kingdom : Routledge. - 1350-4851 .- 1466-4291. ; 17:6, s. 543-546
  • Tidskriftsartikel (refereegranskat)abstract
    • This article studies the relationship between the business cycle and alcohol sales in Sweden using a data set for the years 1861-2000. Using wavelet-based band-pass filtering, it is found that there is a pro-cyclical relationship, i.e. alcohol sales increases in short-term economic upturns. Using moving window techniques, we see that the pro-cyclical relationship holds over the entire time period. We also find that alcohol sales are a long-memory process with nonstationary behaviour, i.e. a shock in alcohol sales has persistent effects.
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29.
  • Krüger, Niclas A, et al. (författare)
  • The Impact of Real Options on Willingness to Pay for Mortality Risk Reductions
  • 2009
  • Ingår i: Journal of Health Economics. - Amsterdam : ELSEVIER SCIENCE. - 0167-6296 .- 1879-1646. ; 28:3, s. 563-569
  • Tidskriftsartikel (refereegranskat)abstract
    • Public investments are dynamic in nature, and decision making must account for the uncertainty, irreversibility and potential for future learning. In this paper we adapt the theory for investment under uncertainty for a public referendum setting and perform the first empirical test to show that estimates of the value of a statistical lite (VSL) from stated preference surveys are highly dependent on the inclusion of the option value. Our results indicate an option value of a major economic magnitude. This implies that previously reported VSL estimates, used in societal benefit-cost analysis of health investments, are exaggerated.
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30.
  • Larsson, Sofie, et al. (författare)
  • Cost-Effectiveness Analysis of Temocillin Treatment in Patients with Febrile UTI Accounting for the Emergence of Antibiotic Resistance
  • 2022
  • Ingår i: Applied Health Economics and Health Policy. - : Springer Science and Business Media LLC. - 1175-5652 .- 1179-1896. ; 20:6, s. 835-843
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Antibiotic resistance has been listed as one of the biggest threats to global health today. A recent study has shown that treating febrile urinary tract infections with temocillin instead of cefotaxime leads to a reduced selection of antibiotic-resistant bacteria. However, a potential challenge with prioritizing temocillin over cefotaxime is the cost consequences. Objective This study aimed to assess the cost effectiveness of using temocillin compared to cefotaxime in treating febrile urinary tract infections in a model that takes the emergence of antibiotic resistance into account. Methods We used a Markov cohort model to estimate the costs and health effects of temocillin and cefotaxime treatment in febrile urinary tract infections in a Swedish setting. Health effects were assessed in terms of quality-adjusted life-years, and the primary outcome was the cost per quality-adjusted life-year gained with temocillin compared to cefotaxime. We used a 5-year time horizon. Results The model results showed that temocillin treatment led to better health outcomes at a higher total cost. The cost per quality-adjusted life-year gained was approximately 38,400 EUR. Results from the sensitivity analysis suggested a 63% probability of temocillin being cost effective at a threshold of 50,000 EUR. Furthermore, results showed that the cost effectiveness of temocillin in febrile urinary tract infections is highly dependent on the drug cost. Conclusions As antibiotic consumption is a driving force of resistance, it is essential to consider the development of resistance when studying the health economic consequences of antibiotic treatments. In doing so, this study found temocillin to be cost effective for febrile urinary tract infections.
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31.
  • Larsson, Sofie, et al. (författare)
  • Production loss and sick leave caused by antibiotic resistance: a register-based cohort study
  • 2022
  • Ingår i: BMC Public Health. - : Springer Science and Business Media LLC. - 1471-2458. ; 22:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Adverse economic consequences of antibiotic resistance, both in health care systems and in society at large, have been estimated to emerge and significantly affect the global economy. To date, most studies of the societal costs of antibiotic resistance have had a macroeconomic perspective, using the number of attributable deaths as a quantifier for production loss. In contrast, there have been few studies of the consequences of antibiotic resistance in terms of the length of sick leave and hence the impact of morbidity on production loss. The aim of our study was to estimate the production loss from ill health caused by antibiotic resistance. Method: To estimate additional production loss due to antibiotic resistance, we used Swedish register-based cohort data to determine days of long-term sick leave (LTSL) for episodes of infection caused by resistant and susceptible bacteria respectively. We collected patient data for four common infection types (bloodstream infection, urinary tract infection, skin and soft tissue infection, and pneumonia), as well as, antibiotic susceptibility test data, and total days of LTSL. We used a two-part model to estimate the number of LTSL days attributable to resistance, and controlled for comorbidities and demographic variables such as age and gender. Results: The results show that antibiotic resistance adds an additional 8.19 days of LTSL compared with a similar infection caused by susceptible bacteria, independent of infection type and resistance type. Furthermore, the results suggest that production loss due to temporary sick leave caused by antibiotic resistance in a working-age population amounts to about 7% of total health care costs attributable to antibiotic resistance in Sweden. Conclusion: Estimating the effect of antibiotic resistance in terms of temporary production loss is important to gain a better understanding of the economic consequences of antibiotic resistance in society and, by extension, enable more effective resource allocation to combat further emergence of resistance. Society's economic costs of antibiotic resistance are, however, probably much greater than those of sick leave due to disease alone.
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32.
  • Lopez, Naldy Parodi, et al. (författare)
  • Reliability and validity of the Swedish indicator 'Drugs that should be avoided in older people'-an appraisal of a set of potentially inappropriate medications
  • 2024
  • Ingår i: European Journal of Clinical Pharmacology. - : SPRINGER HEIDELBERG. - 0031-6970 .- 1432-1041.
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose To analyse the reliability and validity of the Swedish indicator 'Drugs that should be avoided in older people'.Methods From a previous study that included consecutive primary care patients >= 65 years of age, all patients >= 75 years of age were analysed. Two physicians independently screened their medication lists and medical records, applying the Swedish indicator which includes potentially inappropriate medications (PIMs): long-acting benzodiazepines, drugs with anticholinergic action, tramadol, propiomazine, codeine, and glibenclamide. The clinical relevance of identified PIMs was independently assessed. Thereafter, the physicians determined in consensus whether some medical action related to the drug treatment was medically justified and prioritised before the next regular visit. If so, the drug treatment was considered inadequate, and if not, adequate.Results A total of 1,146 drugs were assessed in 149 patients (75-99 years, 62% female, 0-20 drugs per patient). In 29 (19%) patients, at least one physician identified >= 1 PIM according to the indicator at issue; 24 (16%) patients were concordantly identified with >= 1 such PIM (kappa: 0.89). Of 26 PIMs concordantly identified, the physicians concordantly assessed four as clinically relevant and 12 as not clinically relevant (kappa: 0.17). After the consensus discussion, six (4%) patients had >= 1 PIM according to the studied indicator that merited action. Using the area under the receiver operating characteristic (ROC) curve, the indicator did not outperform chance in identifying inadequate drug treatment: 0.56 (95% confidence interval: 0.46 to 0.66).Conclusion The Swedish indicator has strong reliability regarding PIM detection but does not validly reflect the adequacy of drug treatment.
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33.
  • Magnusson, Mikael, et al. (författare)
  • Bioconversion of food waste to biocompatible wet-laid fungal films
  • 2022
  • Ingår i: Materials & design. - : Elsevier. - 0264-1275 .- 1873-4197. ; 216
  • Tidskriftsartikel (refereegranskat)abstract
    • The fungus Rhizopus delemar was grown on bread waste in a submerged cultivation process and wet-laid into films. Alkali or enzyme treatments were used to isolate the fungal cell wall. A heat treatment was also applied to deactivate biological activity of the fungus. Homogenization of fungal biomass was done by an iterative ultrafine grinding process. Finally, the biomass was cast into films by a wet-laid process. Ultrafine grinding resulted in densification of the films. Fungal films showed tensile strengths of up to 18.1 MPa, a Young's modulus of 2.3 GPa and a strain at break of 1.4%. Highest tensile strength was achieved using alkali treatment, with SEM analysis showing a dense and highly organized structure. In contrast, less organized structures were obtained using enzymatic or heat treatments. A cell viability assay and fluorescent staining confirmed the biocompatibility of the films. A promising route for food waste valorization to sustainable fungal wet-laid films was established. © 2022 The Authors
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34.
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35.
  • Olesen, J, et al. (författare)
  • The economic cost of brain disorders in Europe
  • 2012
  • Ingår i: European Journal of Neurology. - : Wiley-Blackwell. - 1351-5101 .- 1468-1331. ; 19:1, s. 155-162
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND AND PURPOSE: In 2005, we presented for the first time overall estimates of annual costs for brain disorders (mental and neurologic disorders) in Europe. This new report presents updated, more accurate, and comprehensive 2010 estimates for 30 European countries.METHODS: One-year prevalence and annual cost per person of 19 major groups of disorders are based on 'best estimates' derived from systematic literature reviews by panels of experts in epidemiology and health economics. Our cost estimation model was populated with national statistics from Eurostat to adjust to 2010 values, converting all local currencies to Euros (€), imputing cost for countries where no data were available, and aggregating country estimates to purchasing power parity-adjusted estimates of the total cost of brain disorders in Europe in 2010.RESULTS: Total European 2010 cost of brain disorders was €798 billion, of which direct health care cost 37%, direct non-medical cost 23%, and indirect cost 40%. Average cost per inhabitant was €5.550. The European average cost per person with a disorder of the brain ranged between €285 for headache and €30 000 for neuromuscular disorders. Total annual cost per disorder (in billion € 2010) was as follows: addiction 65.7; anxiety disorders 74.4; brain tumor 5.2; child/adolescent disorders 21.3; dementia 105.2; eating disorders 0.8; epilepsy 13.8; headache 43.5; mental retardation 43.3; mood disorders 113.4; multiple sclerosis 14.6; neuromuscular disorders 7.7; Parkinson's disease 13.9; personality disorders 27.3; psychotic disorders 93.9; sleep disorders 35.4; somatoform disorder 21.2; stroke 64.1; and traumatic brain injury 33.0.CONCLUSION: Our cost model revealed that brain disorders overall are much more costly than previously estimated constituting a major health economic challenge for Europe. Our estimate should be regarded as conservative because many disorders or cost items could not be included because of lack of data.
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36.
  • Orlowski, K. A., et al. (författare)
  • Cutting Forces for Clear and Knotty Pine Wood
  • 2023
  • Ingår i: Proceedings of the 25th International Wood Machining Seminar.
  • Konferensbidrag (refereegranskat)abstract
    • Sawmill managers are interested in carrying out the sawmilling process in an efficient manner with minimal waste of raw material. In primary processing, an increase in productivity can be achieved if the process can be controlled. This can be achieved by developing a macro-mechanic model of the cutting power determination considered from a point of view of modern fracture mechanics has been developed. For the model knowledge about fracture toughness and shear yield stresses is vital. Pine wood (Pinus sylvestris L.) is a popular species which is widely used in wood industry in Poland and Sweden. Test samples with a cross section of 70 × 70 mm were originated from the both countries. Before sawing, all wood samples were scanned on X-ray Computed Tomography in laboratory conditions in Skellefteå (Sweden). These CT scans were helpful in indicating where clear and knotty samples were obtained from beams. Cutting tests were carried out on the custom-made laboratory stand in Skellefteå. The rotating arm held the wood sample, and the cutting speed equaled 15.5 ms−1. A stellite tipped tooth was fed into the wood sample with uncut chip thicknesses for clear wood 0.5; 0.7 and 1.1 mm, and for knotty wood 0.3; 0.5 and 0.7 mm. The tooth data: overall set equal to 2.9 mm, rake angle 27°, and clearance angle 12°. A piezoelectric sensor on the tooth holder measured the cutting forces. On the basis of the experimental findings it is possible to create mathematical models cutting forces for clear and knotty pine wood. For knotty wood the intercept is almost twice than for clear wood.
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37.
  • Pietilä, Riikka, et al. (författare)
  • Molecular anatomy of adult mouse leptomeninges
  • 2023
  • Ingår i: Neuron. - : Elsevier. - 0896-6273 .- 1097-4199. ; 111:23
  • Tidskriftsartikel (refereegranskat)abstract
    • Leptomeninges, consisting of the pia mater and arachnoid, form a connective tissue investment and barrier enclosure of the brain. The exact nature of leptomeningeal cells has long been debated. In this study, we iden-tify five molecularly distinct fibroblast-like transcriptomes in cerebral leptomeninges; link them to anatomically distinct cell types of the pia, inner arachnoid, outer arachnoid barrier, and dural border layer; and contrast them to a sixth fibroblast-like transcriptome present in the choroid plexus and median eminence. Newly identified transcriptional markers enabled molecular characterization of cell types responsible for adherence of arach-noid layers to one another and for the arachnoid barrier. These markers also proved useful in identifying the molecular features of leptomeningeal development, injury, and repair that were preserved or changed after traumatic brain injury. Together, the findings highlight the value of identifying fibroblast transcriptional subsets and their cellular locations toward advancing the understanding of leptomeningeal physiology and pathology.
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38.
  • Reuterskiold, Maria H, et al. (författare)
  • Diagnostic performance of computed tomography colonography in symptomatic patients and in patients with increased risk for colorectal disease
  • 2006
  • Ingår i: Acta Radiol. - : SAGE Publications. - 0284-1851. ; 47:9, s. 888-98
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE: To evaluate the diagnostic performance (colorectal lesions) of computed tomography (CT) colonography in 111 patients, a majority of whom were at high risk for colorectal neoplasia. MATERIAL AND METHODS: After bowel preparation, CT colonography was performed, immediately followed by conventional colonoscopy. The diagnostic performance of CT colonography was analyzed relative to lesion size, histological diagnosis, and diagnostic certainty. RESULTS: The sensitivity of CT colonography increased with lesion size (P<0.001), and was 91% (21/23) for lesions > or = 10 mm. All 10 carcinomas and 86% (19/22) of adenomas > or = 5 mm were detected. Unconfirmed or false-positive CT findings were generally small and/or reported with low diagnostic certainty. The specificity of CT colonography would be 45% (30/66; 95% CI 34% to 57%) if patients with findings of any size and any diagnostic certainty were selected for follow-up, and 92% (85/92; 95% CI 85% to 96%) if only patients with CT findings > or = 10 mm classified as certain were selected. CONCLUSION: CT colonography had a high sensitivity for lesions > or = 5 mm. The diagnostic performance increased with lesion size and degree of diagnostic certainty, and was higher for adenomas.
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39.
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40.
  • Svensson, Ann-Marie, 1963, et al. (författare)
  • The influence of a history of diabetes on treatment and outcome in acute myocardial infarction, during two time periods and in two different countries
  • 2007
  • Ingår i: Int J Cardiol. - : Elsevier Ireland Ltd. - 1874-1754 .- 0167-5273. ; 119:3, s. 319-25
  • Tidskriftsartikel (refereegranskat)abstract
    • AIMS: The aim of this study was to investigate the influence of diabetes on treatment and outcome in acute myocardial infarction (AMI), during two time periods, in two countries, and to assess whether this influence has changed over the past decades. METHODS: Patients, aged 30 to 74, with a diagnosis of AMI in two urban areas--Goteborg, Sweden and Minneapolis-St. Paul, Minnesota, USA--hospitalized during 1990-1991 and 1995-1996 were included. The primary endpoint was 7-year all-cause mortality. RESULTS: The study included 3824 patients, 734 (19%) had diabetes. Age-adjusted in-hospital mortality of diabetic patients was nearly twofold higher compared with non-diabetic patients (9.8% vs. 5.0%, p<0.05). Between 1990-1991 and 1995-1996 in-hospital mortality declined for both diabetic (11.9% vs. 7.6%, p=0.07) and non-diabetic (6.3% vs. 3.6%, p=0.002) patients. A history of diabetes was associated with nearly twofold higher long-term mortality rate (48.5% vs. 26%, p<0.05). Seven-year mortality was reduced between 1990-1991 and 1995-1996 in both diabetic (51.6% vs. 45.2%, p=0.13) and non-diabetic patients (29.3% vs. 22.1%, p<0.0001) (The results did not reach statistical significance for diabetic patients, due to smaller sample size.) During their hospital stay, diabetic patients received significantly less aspirin, beta-blockers and thrombolysis. After adjustment, a history of diabetes remained significantly associated with 7-year mortality following AMI, doubling the hazard of death (hazard ratio (HR)=2.11; 95% confidence interval (CI): 1.80-2.46). CONCLUSION: A history of diabetes is associated with nearly twofold higher long-term mortality rate and is independently associated with 7-year mortality following AMI. Short- and long-term mortality decreased from 1990 to 1995 in both non-diabetic and diabetic patients. Underutilization of evidence-based treatments contributes to the remaining increased mortality in diabetic patients with acute coronary disease.
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41.
  • Svensson, Mikael, 1980-, et al. (författare)
  • Mortality and economic fluctuations : evidence from wavelet analysis for Sweden 1800-2000
  • 2012
  • Ingår i: Journal of Population Economics. - Berlin : Springer. - 0933-1433 .- 1432-1475. ; 25:4, s. 1215-1235
  • Tidskriftsartikel (refereegranskat)abstract
    • Using wavelet methods, this paper analyzes the relationship between the age-adjusted, infant, and cause-specific mortality rates and the business cycle in Sweden over the period 1800–2000 (1911–1996 for cause-specific mortality). For the period 1800–2000, an increase in GDP by 1% decreased mortality by 0.7%. This overall relationship is due to a strong counter-cyclical relationship in the nineteenth century, which disappeared in the twentieth century. In contrast, in the twentieth century higher mortality in economic upturns is found for mortality caused by circulatory diseases (including stroke) and accidents.
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42.
  • Svensson, Per-Arne, 1969, et al. (författare)
  • Major role of HSP70 as a paracrine inducer of cytokine production in human oxidized LDL treated macrophages.
  • 2006
  • Ingår i: Atherosclerosis. - : Elsevier BV. - 0021-9150. ; 185:1, s. 32-8
  • Tidskriftsartikel (refereegranskat)abstract
    • Lipid accumulation and inflammation are key hallmarks of the atherosclerotic plaque and macrophage uptake of oxidized low-density lipoprotein (oxLDL) is believed to drive these processes. Initial experiments show that supernatants from oxLDL treated macrophages could induce IL-1beta production in naïve macrophages. To search for potential paracrine mediators that could mediate this effect a DNA microarray scan of oxLDL treated human macrophages was performed. This analysis revealed that oxLDL induced activation of heat shock protein (HSP) expression. HSPs have been implicated in the development of atherosclerosis, but the exact mechanisms for this is unclear. Extracellular heat shock protein 70 (HSP70) has been shown to elicit a pro-inflammatory cytokine response in monocytes and could therefore be a potential paracrine pro-inflammatory mediator. After 24 h of oxLDL treatment there was a significant increase of HSP70 concentrations in supernatants from oxLDL treated macrophages (oxLDLsup) compared to untreated controls (P<0.05). OxLDLsup could induce both interleukin (IL)-1beta and IL-12 secretion in naïve macrophages. We also demonstrate that the effect of oxLDLsup on cytokine production and release could be blocked by inhibition of HSP70 transcription or secretion or by the use of HSP70 neutralizing antibodies. This suggests that extracellular HSP70 can mediate pro-inflammatory changes in macrophages in response to oxLDL.
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43.
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44.
  • von Kobyletzki, Laura, et al. (författare)
  • Validation of a parental questionnaire to identify atopic dermatitis in a population-based sample of children up to 2 years of age
  • 2013
  • Ingår i: Dermatology. - Basel, Switzerland : S. Karger. - 1018-8665 .- 1421-9832. ; 226:3, s. 222-226
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Validated eczema questionnaires have been available for schoolchildren only, but the incidence of atopic dermatitis (AD) is highest during infancy. Objective: To validate a parental questionnaire to identify AD in children up to 2 years of age.Methods: Parents of 476 children answered a written questionnaire prior to an examination by a physician. Sensitivity, specificity, predictive values and test-retest reliability of the questionnaire were assessed.Results: A total of 245 (51%) girls and 231 (49%) boys, aged 1-24 months, with and without physician-diagnosed AD participated. Seventy-one children (15%) had physician-diagnosed AD. Validation of the questionnaire by comparisons with physicians' diagnoses showed a sensitivity of 0.87 (95% confidence interval, CI, 0.77-0.94) and a specificity of 0.98 (95% CI, 0.96-0.99). The positive predictive value was 0.90 (95% CI, 0.80-0.96) and the negative predictive value was 0.98 (95% CI, 0.96-0.99). Conclusion: The questionnaire identified AD in children aged 0-2 years with high accuracy.
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45.
  • Wijting, C., et al. (författare)
  • Key Technologies for IMT-Advanced Mobile Communication Systems
  • 2009
  • Ingår i: IEEE Wireless Communications. - 1536-1284 .- 1558-0687. ; 16:3, s. 76-85
  • Tidskriftsartikel (refereegranskat)abstract
    • WINNER is an ambitious research project aiming at identification, development, and assessment of key technologies for IMT-Advanced mobile communication systems. WINNER has devised an OFDMA-based system concept with excellent system-level performance for flexible deployments in a wide variety of operating conditions. The WINNER system provides a significant step forward from current 3G systems. Key innovations integrated into the system concept include flexible spectrum usage and relaying, adaptive advanced antenna schemes and pilot design, close to optimal link adaptation, hierarchical control signaling, and a highly flexible multiple access scheme. The end-to-end performance assessment results demonstrate that the WINNER concept meets the IMT-Advanced requirements.
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46.
  • Willers, C., et al. (författare)
  • Sociodemographic determinants and health outcome variation in individuals with type 1 diabetes mellitus: A register-based study
  • 2018
  • Ingår i: Plos One. - : Public Library of Science (PLoS). - 1932-6203. ; 13:6
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Socioeconomic status, origin or demographic attributes shall not determine the quality of healthcare delivery, according to e.g. United Nations and European Union rules. Health equity has been defined as the absence of systematic disparities and unwarranted differences between groups defined by differences in social advantages. A study was performed to investigate whether this was applicable to type 1 diabetes mellitus (T1D) care in a setting with universal, tax-funded healthcare. Methods This retrospective registry-study was based on patient-level data from individuals diagnosed with T1D during 2010-2011 (n = 16,367) in any of seven Swedish county councils (covering -65% of the Swedish population). Health equity in T1D care was analysed through multivariate regression analyses on absolute HbA1c level at one-year follow-up, one-year change in estimated glomerular filtration rate (eGFR) and one-year change in cardiovascular risk score, using selected sociodemographic dimensions as case-mix factors. Results Higher educational level was consistently associated with lower levels of HbA1c, and so was being married. Never married was associated with worse eGFR development, and lower educational level was associated with higher cardiovascular risk. Women had higher HbA1c levels than men, and glucose control was significantly worse in patients below the age of 25. Conclusion Patients' sociodemographic profile was strongly associated with absolute levels of risk factor control in T1 D, but also with an increased annual deterioration in eGFR. Whether these systematic differences stem from patient-related problems or healthcare organisational shortcomings is a matter for further research. The results, though, highlight the need for intensified diabetes management education and secondary prevention directed towards T1D patients, taking sociodemographic characteristics into account.
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47.
  • Yakimova, Rositsa, 1942-, et al. (författare)
  • Optical and Morphological Features of Bulk and Homoepitaxial ZnO
  • 2006
  • Ingår i: Superlattices and Microstructures. - : Elsevier BV. - 0749-6036 .- 1096-3677. ; 39, s. 247-256
  • Tidskriftsartikel (refereegranskat)abstract
    • ZnO substrate crystals from two different sources, and epitaxial layers have been studied by SEM, AFM, photoluminescence (T=2-135K) and EPR. Although fabricated by the same growth principle, i.e. the hydrothermal technique, the substrates differ in terms of purity and structural quality. In the PL spectra of all samples the dominating emission originates from the donor bound exciton (BE) recombination positioned at about 3361 meV. The temperature dependence of the spectra confirms the assignment of the free exciton emission in the purest sample, the line at 3376 meV evolves into a broad peak at higher temperatures, probably including both A and B excitons. Another FE-related emission appears as a shoulder on the high-energy side of FEA,B above 40 K. It is expected and associated with the crystal-field split-off counterpart of the valence band. Free-exciton related emission in the less pure sample can only be seen if the temperature is above 45 K. At T=135K all bound excitons are quenched and the spectrum in both samples consists of the free exciton no-phonon lines and their replicas. However, the emission from the pure samples is several orders of magnitude stronger than that from the other sample, which indicates strong non-radiative quenching of the excitons in the latter sample. The EPR measurements reveal a possible scenario of impurity re-arrangement, e.g. annealing at 950 °C may dissociate existing complexes and release Fe as isolated ions. The AFM and SEM investigations of an epilayer grown by MOCVD on one of the studied substrates have indicated growth instabilities and structural irregularities, thus pointing to the need for substrate quality and epitaxial process optimization.
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