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| 9. |
- Abazov, V. M., et al.
(author)
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The upgraded DO detector
- 2006
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In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 565:2, s. 463-537
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Journal article (peer-reviewed)abstract
- The DO experiment enjoyed a very successful data-collection run at the Fermilab Tevatron collider between 1992 and 1996. Since then, the detector has been upgraded to take advantage of improvements to the Tevatron and to enhance its physics capabilities. We describe the new elements of the detector, including the silicon microstrip tracker, central fiber tracker, solenoidal magnet, preshower detectors, forward muon detector, and forward proton detector. The uranium/liquid -argon calorimeters and central muon detector, remaining from Run 1, are discussed briefly. We also present the associated electronics, triggering, and data acquisition systems, along with the design and implementation of software specific to DO.
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| 11. |
- Christenson, A., et al.
(author)
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The Swedish Youth with Obesity cohort: Profile of an ongoing prospective study
- 2023
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In: Obesity. - 1930-7381. ; 31:6, s. 1678-1685
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Journal article (peer-reviewed)abstract
- ObjectiveAs there is a lack of studies on adolescents and young adults with obesity, the Swedish Youth with Obesity cohort was set up to describe the long-term results of medical, as well as surgical, obesity interventions in youth. This article describes the study protocol. MethodsSince 2018, the study has continuously recruited patients aged between 16 and 25 years who have been admitted for obesity treatment at a specialist obesity clinic in Stockholm, Sweden. Participants provide data from blood tests, questionnaires, and anthropometric measurements. Data are collected longitudinally at enrollment and after 18 months and 3, 4, 5, and 10 years. ResultsIn the first 500 participants (76% female), the mean age was 21 (SD 3.0) years and the mean BMI was 41.3 (SD 6.1) kg/m(2) at enrollment. Almost half of the participants (44.4%) reported that both parents were born outside the Nordic countries. The proportion of participants who smoked at least sometimes was 28.4%. ConclusionsThe longitudinally collected data from the Swedish Youth with Obesity cohort will become a valuable source for answering various research questions regarding long-term results of medical and surgical obesity treatment in adolescents and young adults with obesity.
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| 12. |
- Padra, Médea, 1986, et al.
(author)
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Increased MUC1 plus a larger quantity and complex size for MUC5AC in the peripheral airway lumen of long-term tobacco smokers
- 2020
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In: Clinical Science. - : Portland Press Ltd.. - 0143-5221 .- 1470-8736. ; 134:10, s. 1107-1125
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Journal article (peer-reviewed)abstract
- There is little information on mucins versus potential regulatory factors in the peripheral airway lumen of long-term smokers with (LTS+) and without (LTS-) chronic obstructive pulmonary disease (COPD). We explored these matters in bronchoalveolar lavage (BAL) samples from two study materials, both including LTS+ and LTS- with a very similar historic exposure to tobacco smoke, and healthy non-smokers (HNSs; n=4-20/group). Utilizing slot blot and immunodetection of processed (filtered and centrifuged), as well as unprocessed BAL samples from one of the materials, we compared the quantity and fraction of large complexes of mucins. All LTS displayed an enhanced (median) level of MUC5AC compared with HNS. LTS- displayed a higher level of large MUC5AC complexes than HNS while LTS+ displayed a similar trend. In all LTS, total MUC5AC correlated with blood leukocytes, BAL neutrophil elastase and net gelatinase activity. Large mucin complexes accounted for most MUC5B, without clear group differences. In all LTS, total MUC5B correlated with total MUC5AC and local bacteria. In the same groups, large MUC5B complexes correlated with serum cotinine. MUC1 was increased and correlated with BAL leukocytes in all LTS whereas MUC2 was very low and without clear group differences. Thus, the main part of MUC5AC and MUC5B is present as large complexes in the peripheral airway lumen and historic as well as current exposure to tobacco smoke emerge as potential regulatory factors, regardless of COPD per se. Bacteria, leukocytes and proteinases also constitute potential regulatory factors, of interest for future therapeutic strategies.
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- Christenson, A., et al.
(author)
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Shame and avoidance as barriers in midwives' communication about body weight with pregnant women: A qualitative interview study
- 2018
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In: Midwifery. - : Elsevier BV. - 0266-6138 .- 1532-3099. ; 63, s. 1-7
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Journal article (peer-reviewed)abstract
- Introduction: Excessive gestational weight gain, regardless of initial BMI, is associated with perinatal risks for both mother and offspring and contributes to obesity in women. Studies report that healthcare professionals find it difficult to communicate about weight and pregnant women perceive healthcare professionals as unconcerned, leaving many women uninformed about weight recommendations and risks. We aimed to explore how midwives approach communication about gestational weight gain recommendations, and to characterize communication barriers and facilitators. Methods: Seventeen midwives from different areas in Sweden were interviewed by a therapist using semi-structured interviews. Interviews were transcribed verbatim and analysed by three researchers using latent content analysis. Recurrent themes were identified and formulated. Results: The main theme identified in the latent part of the analysis was "midwives use avoidant behaviours to cope with fear of inflicting worries, shame or feelings of guilt in pregnant women". Avoidant behaviours include: adjusting weight recommendations, toning down risks and avoid talking about weight. Subthemes identified were (I) Conflicting responsibilities in midwives' professional identity (II) Perceived deficiencies in the working situation. Conclusion: Midwives' empathy and awareness of weight stigma strongly affects communication about weight with pregnant women, and midwives' use of avoidant behaviours constitutes salient information barriers. More research is needed on whether gestational weight guidelines and weighing routines for all women, resources for extra visits, training in specific communication skills and backup access to other professions can facilitate for midwives to initiate and communicate about healthy gestational weight development, enabling more pregnant women to make well-informed lifestyle choices.
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| 15. |
- Christenson, A., et al.
(author)
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Women's perceived reasons for their excessive postpartum weight retention: A qualitative interview study
- 2016
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In: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 11:12
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Journal article (peer-reviewed)abstract
- Introduction: Obesity in Sweden has doubled to 14% over the last 20 years. New strategies for treatment and prevention are needed. Excessive gestational weight gain has been found to contribute substantially to obesity, and there is a consistent association between postpartum weight retention and obesity later in life. We aimed to explore what factors women perceive as reasons for having substantial postpartum weight retention, to identify areas for new and improved interventions. Methods: Qualitative interview study (semi-structured) using an emergent design. Fifteen women, with a postpartum weight retention ≥ 10 kg, were interviewed by a trained cognitive therapist. Eight women had pre-pregnancy BMI below 30 kg/m2. Interviews were transcribed verbatim and data analysed using inductive manifest content analysis. Salient text passages were extracted, shortened, coded and clustered into categories. Results: Participants reported no knowledge of current gestational weight gain recommendations or of risks for adverse pregnancy outcomes with excessive weight gain or postpartum weigh retention. Excessive eating emerged as a common strategy to provide relief of psychological, emotional and physical discomfort, such as depression and morning sickness. Women perceived medical staff as being unconcerned about weight, and postpartum weight loss support was scarce or absent. Some women reported eating more due to a belief that breastfeeding would automatically lead to weight loss. Conclusion: There is a need to raise awareness about risks with unhealthy gestational weight development and postpartum weight retention in women of childbearing age. The common strategy to cope with psychological, emotional or physical discomfort by eating is an important factor to target with intervention. The postpartum year is a neglected period where additional follow-up on weight and weight loss support is strongly indicated. © 2016 Christenson et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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| 16. |
- Nishiyama, C, et al.
(author)
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Apples to apples or apples to oranges? International variation in reporting of process and outcome of care for out-of-hospital cardiac arrest
- 2014
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In: Resuscitation. - : Elsevier Ireland Ltd.. - 0300-9572 .- 1873-1570. ; 85:11, s. 1599-1609
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Journal article (peer-reviewed)abstract
- OBJECTIVES: Survival after out-of-hospital cardiac arrest (OHCA) varies between communities, due in part to variation in the methods of measurement. The Utstein template was disseminated to standardize comparisons of risk factors, quality of care, and outcomes in patients with OHCA. We sought to assess whether OHCA registries are able to collate common data using the Utstein template. A subsequent study will assess whether the Utstein factors explain differences in survival between emergency medical services (EMS) systems. STUDY DESIGN: Retrospective study. SETTING: This retrospective analysis of prospective cohorts included adults treated for OHCA, regardless of the etiology of arrest. Data describing the baseline characteristics of patients, and the process and outcome of their care were grouped by EMS system, de-identified, and then collated. Included were core Utstein variables and timed event data from each participating registry. This study was classified as exempt from human subjects' research by a research ethics committee. MEASUREMENTS AND MAIN RESULTS: Thirteen registries with 265 first-responding EMS agencies in 13 countries contributed data describing 125,840 cases of OHCA. Variation in inclusion criteria, definition, coding, and process of care variables were observed. Contributing registries collected 61.9% of recommended core variables and 42.9% of timed event variables. Among core variables, the proportion of missingness was mean 1.9±2.2%. The proportion of unknown was mean 4.8±6.4%. Among time variables, missingness was mean 9.0±6.3%. CONCLUSIONS: International differences in measurement of care after OHCA persist. Greater consistency would facilitate improved resuscitation care and comparison within and between communities.
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| 18. |
- Bazarian, Jeffrey J., et al.
(author)
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Serum GFAP and UCH-L1 for prediction of absence of intracranial injuries on head CT (ALERT-TBI) : a multicentre observational study
- 2018
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In: Lancet Neurology. - : Lancet Publishing Group. - 1474-4422 .- 1474-4465. ; 17:9, s. 782-789
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Journal article (peer-reviewed)abstract
- Background: More than 50 million people worldwide sustain a traumatic brain injury (TBI) annually. Detection of intracranial injuries relies on head CT, which is overused and resource intensive. Blood-based brain biomarkers hold the potential to predict absence of intracranial injury and thus reduce unnecessary head CT scanning. We sought to validate a test combining ubiquitin C-terminal hydrolase-L1 (UCH-L1) and glial fibrillary acidic protein (GFAP), at predetermined cutoff values, to predict traumatic intracranial injuries on head CT scan acutely after TBI.Methods: This prospective, multicentre observational trial included adults (≥18 years) presenting to participating emergency departments with suspected, non-penetrating TBI and a Glasgow Coma Scale score of 9-15. Patients were eligible if they had undergone head CT as part of standard emergency care and blood collection within 12 h of injury. UCH-L1 and GFAP were measured in serum and analysed using prespecified cutoff values of 327 pg/mL and 22 pg/mL, respectively. UCH-L1 and GFAP assay results were combined into a single test result that was compared with head CT results. The primary study outcomes were the sensitivity and the negative predictive value (NPV) of the test result for the detection of traumatic intracranial injury on head CT.Findings: Between Dec 6, 2012, and March 20, 2014, 1977 patients were recruited, of whom 1959 had analysable data. 125 (6%) patients had CT-detected intracranial injuries and eight (<1%) had neurosurgically manageable injuries. 1288 (66%) patients had a positive UCH-L1 and GFAP test result and 671 (34%) had a negative test result. For detection of intracranial injury, the test had a sensitivity of 0·976 (95% CI 0·931-0·995) and an NPV of 0·996 (0·987-0·999). In three (<1%) of 1959 patients, the CT scan was positive when the test was negative.Interpretation: These results show the high sensitivity and NPV of the UCH-L1 and GFAP test. This supports its potential clinical role for ruling out the need for a CT scan among patients with TBI presenting at emergency departments in whom a head CT is felt to be clinically indicated. Future studies to determine the value added by this biomarker test to head CT clinical decision rules could be warranted.Funding: Banyan Biomarkers and US Army Medical Research and Materiel Command.
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| 19. |
- Bernson, Elin, 1987, et al.
(author)
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Cytomegalovirus Serostatus Affects Autoreactive NK Cells and Outcomes of IL2-Based Immunotherapy in Acute Myeloid Leukemia
- 2018
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In: Cancer Immunology Research. - : American Association for Cancer Research (AACR). - 2326-6066 .- 2326-6074. ; 6:9, s. 1110-1119
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Journal article (peer-reviewed)abstract
- Human cytomegalovirus (CMV) infection is reported to promote NK cell differentiation and education. The CMV-induced generation of highly differentiated adaptive-like NK cells has been proposed to affect favorably on the maintenance of remission in patients with acute myeloid leukemia (AML) after allogeneic stem cell transplantation (allo-SCT). The impact of CMV infection and adaptive-like NK cells on relapse and survival of patients with AML not receiving allo-SCT remains unknown. We assayed CMV IgG serostatus to determine past CMV infection in 81 nontransplanted AML patients who were receiving relapse-prevention immunotherapy comprising histamine dihydrochloride and low-dose interleukin-2 (HDC/IL2; NCT01347996). CMV seropositivity correlated negatively with leukemia-free and overall survival of patients receiving HDC/IL2, but did not correlate with outcomes in a contemporary control cohort. Analysis of outcome after stratification of patients based on concordant or discordant killer immunoglobulin-like receptor (KIR) and HLA genotypes implied that the negative impact of CMV seropositivity was restricted to patients lacking a ligand to inhibitory KIRs (iKIR). Previous CMV infection was also associated with fewer NK cells expressing only nonself iKIRs (NS-iKIR). We propose that CMV-driven NK cell education depletes the population of NS-iKIR NK cells, which in turn reduces the clinical benefit of relapse-preventive immunotherapy in AML.
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| 20. |
- Bernson, Elin, 1987, et al.
(author)
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Downregulation of HLA Class I Renders Inflammatory Neutrophils More Susceptible to NK Cell-Induced Apoptosis
- 2019
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In: Frontiers in Immunology. - : Frontiers Media SA. - 1664-3224. ; 10
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Journal article (peer-reviewed)abstract
- Neutrophils are potent effector cells and contain a battery of harmful substances and degrading enzymes. A silent neutrophil death, i.e., apoptosis, is therefore of importance to avoid damage to the surrounding tissue and to enable termination of the acute inflammatory process. There is a pile of evidence supporting the role for pro-inflammatory cytokines in extending the life-span of neutrophils, but relatively few studies have been devoted to mechanisms actively driving apoptosis induction in neutrophils. We have previously demonstrated that natural killer (NK) cells can promote apoptosis in healthy neutrophils. In this study, we set out to investigate how neutrophil sensitivity to NK cell-mediated cytotoxicity is regulated under inflammatory conditions. Using in vitro-activated neutrophils and a human skin chamber model that allowed collection of in vivo-transmigrated neutrophils, we performed a comprehensive characterization of neutrophil expression of ligands to NK cell receptors. These studies revealed a dramatic downregulation of HLA class I molecules in inflammatory neutrophils, which was associated with an enhanced susceptibility to NK cell cytotoxicity. Collectively, our data shed light on the complex regulation of interactions between NK cells and neutrophils during an inflammatory response and provide further support for a role of NK cells in the resolution phase of inflammation.
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| 21. |
- Christenson, A., et al.
(author)
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Attitudes and beliefs in Swedish midwives and obstetricians towards obesity and gestational weight management
- 2020
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In: BMC Pregnancy and Childbirth. - : Springer Science and Business Media LLC. - 1471-2393. ; 20:1
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Journal article (peer-reviewed)abstract
- Background Gestational weight interventions are important in maternity care to counteract adverse pregnancy events. However, qualitative findings indicate potential obstacles in the implementation of interventions due to the sensitivity of the subject and existing obesity stigma. Pregnant women have reported disrespectful or unhelpful communication, while some midwives seem to avoid the topic, as not to upset women. This descriptive study aimed to provide knowledge about maternity care providers' beliefs about obesity, and their attitudes towards gestational weight management. Method A web survey was emailed to Swedish maternity care clinics. Existing questionnaires, "Beliefs About Obese People" (BAOP), "Perceived weight bias in health care" and "Attitudes toward obese patients" was used, supplemented with questions formulated for this study. An open free-text question allowed participants to provide a deeper and more nuanced picture of the topic. Results 274 respondents (75% midwives and 25% obstetricians) participated. One third of respondents found obesity to be a more sensitive topic than smoking or alcohol habits, and 17% of midwives agreed to the statement: "I sometimes avoid talking about weight so as not to make the pregnant woman worried or ashamed". Having had training in motivational interviewing seemed positively associated with midwives' inclination to talk about body weight, especially with women with obesity (p = .001), whereas years of working experience were not associated. Having received obesity education increased confidence in providing adequate information, but still only 46% felt they had enough knowledge to provide diet and exercise advice to pregnant women with obesity. Qualitative data revealed great empathy for women with obesity, and a wish to have more obesity education and access to other professionals. Conclusion Swedish maternity care staff displayed empathy for women with obesity and found gestational weight interventions important, but almost one fifth of midwives sometimes avoid the subject of body weight for fear of upsetting women. Education about obesity facts, training in person-centered communication, i.e. motivational interviewing, and access to dieticians may facilitate gestational weight management implementation.
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| 22. |
- Christenson, Andreas, et al.
(author)
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Direct electron transfer between ligninolytic redox enzymes and electrodes
- 2004
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In: Electroanalysis. - : Wiley. - 1040-0397 .- 1521-4109. ; 16:13-14, s. 1074-1092
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Research review (peer-reviewed)abstract
- The electrochemistry of the ligninolytic redox enzymes, which include lignin peroxidase, manganese peroxidase and laccase and possibly also cellobiose dehydrogenase, is reviewed and discussed in conjunction with their basic biochemical characteristics. It is shown that long-range electron transfer between these enzymes and electrodes can be established and their ability to degrade lignin through a direct electron transfer mechanism is discussed.
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| 23. |
- Clemmensen, SN, et al.
(author)
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Alpha-1-antitrypsin is produced by human neutrophil granulocytes and their precursors and liberated during granule exocytosis
- 2011
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In: EUROPEAN JOURNAL OF HAEMATOLOGY. - 0902-4441. ; 86:6, s. 517-530
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Journal article (peer-reviewed)abstract
- Alpha-1-antitrypsin (A1AT) is an important inhibitor of neutrophil proteases including elastase, cathepsin G, and proteinase 3. Transcription profiling data suggest that A1AT is expressed by human neutrophil granulocytes during all developmental stages. A1AT has hitherto only been found associated with azurophile granules in neutrophils indicative of A1AT expression being restricted to the promyelocyte stage. We examined the localization and production of A1AT in healthy donor neutrophils and found A1AT to be a constituent of all granule subtypes and to be released from neutrophils following stimulation. A1AT is produced at all stages of myeloid maturation in the bone marrow. The production increases as neutrophils enter circulation and increases further upon migration to tissues as observed in skin windows and when blood neutrophils are incubated with granulocyte colony-stimulating factor. Neutrophils from patients with A1AT-deficiency carrying the (PI)ZZ mutation in the A1AT gene appeared structurally and functionally normal, but A1AT produced in leukocytes of these patients lacked the ability to bind proteases efficiently. We conclude that A1AT generation and release from neutrophils add significantly to the antiprotease levels in tissues during inflammation. Impaired binding of neutrophil A1AT to serine proteases in patients with (PI)ZZ mutations may enhance their susceptibility to the development of emphysema.
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| 24. |
- Gustafsson, G, et al.
(author)
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The electric field and wave experiment for the Cluster mission
- 1997
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In: Space Science Reviews. - 0038-6308 .- 1572-9672. ; 79, s. 137-156
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Journal article (peer-reviewed)abstract
- The electric-field and wave experiment (EFW) on Cluster is designed to measure the electric-field and density fluctuations with sampling rates up to 36 000 samples s(-1). Langmuir probe sweeps can also be made to determine the electron density and temperature. The instrument has several important capabilities. These include (1) measurements of quasi-static electric fields of amplitudes lip to 700 mV m(-1) with high amplitude and time resolution, (2) measurements over short periods of time of up to five simualtaneous waveforms (two electric signals and three magnetic signals from the seach coil magnetometer sensors) of a bandwidth of 4 kHz with high time resolution, (3) measurements of density fluctuations in four points with high time resolution. Among the more interesting scientific objectives of the experiment are studies of nonlinear wave phenomena that result in acceleration of plasma as well as large- and small-scale interferometric measurements. By using four spacecraft for large-scale differential measurements and several Langmuir probes on one spacecraft for small-scale interferometry, it will be possible to study motion and shape of plasma structures on a wide range of spatial and temporal scales. This paper describes the primary scientific objectives of the EFW experiment and the technical capabilities of the instrument.
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| 25. |
- Gustafsson, G, et al.
(author)
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The electric field and wave experiment for the Cluster mission
- 1997
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In: SPACE SCIENCE REVIEWS. - : KLUWER ACADEMIC PUBL. - 0038-6308. ; 79:1-2, s. 137-156
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Journal article (peer-reviewed)abstract
- The electric-field and wave experiment (EFW) on Cluster is designed to measure the electric-field and density fluctuations with sampling rates up to 36 000 samples s(-1). Langmuir probe sweeps can also be made to determine the electron density and tempera
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