| 1. |
- Moberg, Christina, et al.
(författare)
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De unga gör helt rätt när de stämmer staten
- 2022
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Ingår i: Aftonbladet. - 1103-9000.
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- 1 620 forskare och lärare i forskarvärlden: Vi ställer oss bakom Auroras klimatkrav
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| 2. |
- Gorcenco, Sorina, et al.
(författare)
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Ataxia-pancytopenia syndrome with SAMD9L mutations
- 2017
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Ingår i: Neurology: Genetics. - 2376-7839. ; 3:5
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: We describe the neurologic, neuroradiologic, and ophthalmologic phenotype of 1 Swedish and 1 Finnish family with autosomal dominant ataxia-pancytopenia (ATXPC) syndrome and SAMD9L mutations.METHODS: Members of these families with germline SAMD9L c.2956C>T, p.Arg986Cys, or c.2672T>C, p.Ile891Thr mutations underwent structured interviews and neurologic and ophthalmologic examinations. Neuroimaging was performed, and medical records were reviewed. Previous publications on SAMD9L-ATXPC were reviewed.RESULTS: Twelve individuals in both families were affected clinically. All mutation carriers examined had balance impairment, although severity was very variable. All but 1 had nystagmus, and all but 1 had pyramidal tract signs. Neurologic features were generally present from childhood on and progressed slowly. Two adult patients, who experienced increasing clumsiness, glare, and difficulties with gaze fixation, had paracentral retinal dysfunction verified by multifocal electroretinography. Brain MRI showed early, marked cerebellar atrophy in most carriers and variable cerebral periventricular white matter T2 hyperintensities. Two children were treated with hematopoietic stem cell transplantation for hematologic malignancies, and the neurologic symptoms of one of these worsened after treatment. Three affected individuals had attention deficit hyperactivity disorder or cognitive problems. Retinal dysfunction was not previously reported in individuals with ATXPC.CONCLUSIONS: The neurologic phenotype of this syndrome is defined by balance or gait impairment, nystagmus, hyperreflexia in the lower limbs and, frequently, marked cerebellar atrophy. Paracentral retinal dysfunction may contribute to glare, reading problems, and clumsiness. Timely diagnosis of ATXPC is important to address the risk for severe hemorrhage, infection, and hematologic malignancies inherent in this syndrome; regular hematologic follow-up might be beneficial.
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| 3. |
- Abadei, S., et al.
(författare)
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DC field dependent properties of Na0.5 K0.5 NbO3/SiO2/Si structures at millimeter-wave frequencies
- 2001
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 78:13, s. 1900-1902
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Tidskriftsartikel (refereegranskat)abstract
- Dielectric properties of laser-ablated 0.5-μm-thick c-axis epitaxial Na0.5K0.5NbO3 films on high-resistivity (7.7 Ω cm) silicon SiO2/Si substrate are studied experimentally at frequencies up to 40 GHz. For measurements, planar 0.5-μm-thick gold electrodes (interdigital and straight slot) are photolithography defined on the top surface of Na0.5K0.5NbO3 films. The slot width between the electrodes is 2 or 4 μm. 13% capacitance change at 40 V dc bias and Q factor more than 15 are observed at 40 GHz, which makes the structure useful for applications in electrically tunable millimeter-wave devices
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| 4. |
- Abelsson, Johanna, et al.
(författare)
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Patients with polycythemia vera have worst impairment of quality of life among patients with newly diagnosed myeloproliferative neoplasms
- 2013
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Ingår i: Leukemia and Lymphoma. - : Informa UK Limited. - 1042-8194 .- 1029-2403. ; 54:10, s. 2226-2230
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Tidskriftsartikel (refereegranskat)abstract
- The quality of life (QoL) at the time of diagnosis of myeloproliferative neoplasm (MPN) has, to date, not been studied. One hundred and seventy-nine patients with MPN: 80 with essential thrombocythemia (ET), 73 with polycythemia vera (PV), 22 with primary myelofibrosis (PMF) and four with MPN undifferentiated, were included in this study. European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC-QLQC30) and the MPN-Symptom Assessment Form (MPN-SAF) were used to evaluate QoL. Fatigue was the most reported symptom in these patients. Patients with PV reported significantly higher mean scores for inactivity, dizziness, cough, itching, depression and lower total QoL compared to patients with ET. Patients with PV had significantly more headache and itching compared to patients with PMF. When the newly diagnosed patients with MPN were compared with a cohort of patients with MPN with mean disease duration of 7.8 years, the differences were most striking for patients with PMF, with significantly more fatigue, abdominal discomfort, concentration problems, insomnia, fever, weight loss and lower overall QoL developed over time.
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| 5. |
- Abrahamsson, Johanna, 1990, et al.
(författare)
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A Raman spectroscopic approach to investigate the production of biodiesel from soybean oil using 1-alkyl-3-methylimidazolium ionic liquids with intermediate chain length
- 2015
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Ingår i: Applied Energy. - : Elsevier BV. - 1872-9118 .- 0306-2619. ; 154, s. 763-770
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Tidskriftsartikel (refereegranskat)abstract
- We present a Raman spectroscopic study of the conversion of soybean oil into biodiesel by methanol using the lipase B enzyme pseudomonas cepacia as the bio-catalyst and 1-alkyl-3-methylimidazolium ionic liquids (CnC1Im) as co-solvents, where the alkyl chain length is varied from ethyl (n=2) to decyl (n=10). We have limited this study to a low reaction temperature, 40°C, and a low enzyme concentration to investigate the possibility of producing biodiesel with low energy and cost demands. We also demonstrate that Raman spectroscopy is a powerful and straightforward method to estimate the yield of the transesterification reaction, by analysis of the characteristic CO stretching mode found in the range ~1730-1750cm-1. Our results indicate that both reaction yield and reaction rate increase with the chain length, but also that for chains longer than decyl further improvements are marginal. We discuss these results from the viewpoint of local interactions and local structure of the investigated ionic liquids.
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| 6. |
- Álvarez-Guerra, Irene, 1995-, et al.
(författare)
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LDO proteins and Vac8 form a vacuole-lipid droplet contact site to enable starvation-induced lipophagy in yeast
- 2024
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Ingår i: Developmental Cell. - 1534-5807 .- 1878-1551. ; 59:6, s. 759-775, e1-e5
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Tidskriftsartikel (refereegranskat)abstract
- Lipid droplets (LDs) are fat storage organelles critical for energy and lipid metabolism. Upon nutrient exhaustion, cells consume LDs via gradual lipolysis or via lipophagy, the en bloc uptake of LDs into the vacuole. Here, we show that LDs dock to the vacuolar membrane via a contact site that is required for lipophagy in yeast. The LD-localized LDO proteins carry an intrinsically disordered region that directly binds vacuolar Vac8 to form vCLIP, the vacuolar-LD contact site. Nutrient limitation drives vCLIP formation, and its inactivation blocks lipophagy, resulting in impaired caloric restriction-induced longevity. We establish a functional link between lipophagy and microautophagy of the nucleus, both requiring Vac8 to form respective contact sites upon metabolic stress. In sum, we identify the tethering machinery of vCLIP and find that Vac8 provides a platform for multiple and competing contact sites associated with autophagy.
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| 7. |
- Andersson, Johanna, 1983, et al.
(författare)
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Photoswitched DNA-binding of a photochromic spiropyran
- 2008
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Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 1520-5126 .- 0002-7863. ; 130:36, s. 11836-11837
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Tidskriftsartikel (refereegranskat)abstract
- The dramatically different DNA-binding properties of the two isomeric forms of a photochromic spiropyran have been demonstrated, enabling photoswitched DNA binding. The closed, UV-absorbing form shows no signs of interaction with DNA. Upon UV exposure the spiropyran is isomerized to the open form that binds to DNA by intercalation. The process is fully reversible as the corresponding dissociation process is induced by visible light. Copyright © 2008 American Chemical Society.
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| 8. |
- Andreasson, Fredrik
(författare)
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Retande, berättelser och kategoriseringar : Om vänskap och kärlek i barns relationsprat
- 2023
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis focuses on how middle school children organize peer group relationships through various forms of so-called relational talk (Evaldsson, 2007), while they also negotiate and more generally make sense of friendships and romantic relationships. Prior micro-sociological research has demonstrated how children in everyday language practices through, for example, teasing, assessments, and storytelling—articulate and manage social relationships and behaviors, moral views, and shared cultural knowledge, thereby constructing their emerging social worlds (see Goodwin & Kyratzis, 2011, for an overview). Several ethnographic studies have also shown how children in everyday peer group interactions construct gendered cultures, encompassing gender hierarchies and heteronormative ordering, while managing social relationships (Renold, 2005). This study is a continued exploration into these areas, building on ethnographic fieldwork, including participant observations, video recordings, and focus group interviews with friendship groups among children in two fifth grade classes in a Swedish school setting. The analysis draws on an ethnomethodological multimodal interactional approach to talk-in- interaction (Goodwin, 1990), combined with membership categorization work (Stokoe, 2010) and ethnographic knowledge of the local culture (Evaldsson, 2021; Goodwin, 2014).The analysis shows that humor-oriented language practices, such as teasing and joking, function as a resource for children to address potentially sensitive and/or embarrassing aspects of social relationships, where humor and collective laughter work as a de-dramatizing resource while building local peer group relationships (cf. Eder, 1991). Moreover, the results show that children’s way of articulating and making sense of their views on friendship and romance through storytelling, assessments, and jocular play is related to a moral dimension, as they index and negotiate (un)acceptable behaviors. This dimension becomes visible through their invocation and management of membership categorizations, person descriptions, and evaluative comments in their local identity work. Simultaneously, the analysis demonstrates how ethnographic knowledge of children’s social life is central in understanding how wider social dynamics become part of the local peer cultures of preteen children (Evaldsson, 2005a; Goodwin, 2011), especially regarding how the negotiation of local categories and their embedded meanings is related to wider social categorizations of gender, social class, and age. Overall, this thesis demonstrates how children as social actors use a variety of interactional resources (i.e., talk, laughter, loud voices, facial expressions, smiles, and gestures) to organize local peer group relationships, while collectively staging, negotiating, and making sense of both romance and friendship.
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| 9. |
- Andreasson, Johanna
(författare)
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High density ferroelectric Na0.5K0.5NbO3 ceramics : preparation and applications
- 2002
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis describes the production of high density ferroelectric Na0.5K0.5NbO3-ceramics (NKN). The main steps in the production are milling, calcination, pressing and sintering. To produce a full dense ceramic material several of these steps have to be considered. In milling the main concern is to produce a powder with small grains and a normally distributed range of grain size. This is done to achieve an optimal packing arrangement with a minimum of porosity. Several different milling techniques and milling parameters such as milling additives and milling media are also discussed. Sintering of the ceramics may be performed in a conventional furnace with or without special atmosphere, so called pressureless sintering. Another method is hot isostatic pressing which is a combination of high isostatic pressure and high temperature; this gives a more efficient sintering. Both methods are discussed here. Paper I describes sintering conditions of NKN produced with different sintering techniques, the results show high density and good ferroelectric properties. Paper II describes the production and properties of thin films laser deposited on different substrates from high dense ceramic targets. Paper III also describes properties of laser deposited thin films on different substrates.
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| 10. |
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| 11. |
- Bengtsson, Therese, et al.
(författare)
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Activation of defence responses to Phytophthora infestans in potato by BABA
- 2014
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Ingår i: Plant Pathology. - : Wiley. - 0032-0862 .- 1365-3059. ; 63, s. 193-202
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Tidskriftsartikel (refereegranskat)abstract
- Late blight caused by Phytophthora infestans is one of the most devastating diseases of the potato crop. Resistance breeding and current fungicides are unable to control the rapidly evolving P. infestans and new control strategies are urgently needed. This study examined mechanisms of dl-β-aminobutyric acid (BABA)-induced resistance (IR) in the potato-P. infestans system. Leaves from two cultivars that differ in their degree of resistance, Bintje and Ovatio, were analysed after foliar treatment with BABA. Rapid activation of various defence responses and a significant reduction in P. infestans growth were observed in leaves treated with BABA. In the more resistant cultivar, Ovatio, the activation was both faster and stronger than in Bintje. Microscopic analysis of leaves treated with BABA revealed induction of small hypersensitive response (HR)-like lesions surrounded by callose, as well as production of hydrogen peroxide (H2O2). Molecular and chemical analyses revealed soluble phenols such as arbutin and chlorogenic acid and activation of PR-1. These results show a direct activation of defence responses in potato, rather than priming as reported for other plant species. They also show that the efficiency of BABA-IR differs between cultivars, which highlights the importance of taking all aspects into consideration when establishing new methods for disease management.
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| 12. |
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| 13. |
- Blomqvist, Mats, et al.
(författare)
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High-performance epitaxial Na0.5K0.5NbO3 thin films by magnetron sputtering
- 2002
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 81:2, s. 337-339
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Tidskriftsartikel (refereegranskat)abstract
- Epitaxial Na0.5K0.5NbO3 (NKN) thin films have been grown on LaAlO3 substrates by rf magnetron sputtering of a stoichiometric, high-density, ceramic target. X-ray diffraction analysis showed c-axis oriented cube-on-cube growth. Micrometer size interdigital capacitor (IDC) structures were defined on the surface of the NKN film using photolithography. The electrical characterization at 1 MHz showed dissipation factor tan delta of 0.010, tunability 16.5% at 200 kV/cm and dielectric permittivity epsilon(r)=470. The frequency dispersion of epsilon(r) between 1 kHz and 1 MHz was 8.5% and the IDCs showed very good insulating properties with leakage current density on the order of 30 nA/cm(2) at 400 kV/cm. The polarization loop exhibits weak ferroelectric hysteresis with maximum polarization 23.5 muC/cm(2) at 600 kV/cm. These results are promising for tunable microwave devices based on rf sputtered NKN thin films.
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| 14. |
- Cho, Chong-Rae, et al.
(författare)
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Ferroelectroc Na0.5K0.5NbO3 films for voltabe tunable microwave devices
- 2000
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Ingår i: Materials Issues for Tunable RF and Microwave Devices II : MRS fall conference. - : Materials Research Society. ; , s. 19-24
-
Konferensbidrag (refereegranskat)abstract
- Single phase Na0.5K0.5NbO3 (NKN) thin films have been pulsed laser deposited on Al2O3(01-12), LaAlO3(001), and MgO(001) single crystal substrates as well as onto SiO2/Si(001) wafers to demonstrate films feasibility for voltage tunable microwave device applications. NKN film texture has been found to be quite different on three different single crystals: highly c-axis oriented on Al2O3, "cube-on-cube" epitaxial quality on LaAlO3, bi-axial textures on MgO, while NKN films grown on Si substrate with various thickness of SiO2 buffer layer possess highly c-axis oriented quadrupled structure. NKN film interdigital capacitors fabricated onto single crystal oxide substrates showed tunability of 30-40 % and dissipation factor of 0.01-0.02 at 1 MHz and applied electric field of 100kV/cm. Microwave frequency measurements for NKN/Si varactors yield 13 % tunability and dielectric loss tan delta as low as 0.012 at 40 GHz under 200 kV/cm applied bias.
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| 15. |
- Hammarson, Martin, 1984, et al.
(författare)
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Molecular AND-logic for dually controlled activation of a DNA-binding spiropyran
- 2010
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 46:38, s. 7130-7132
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Tidskriftsartikel (refereegranskat)abstract
- A spiropyran photoswitch is activated using UV light and protons from a form that shows no interaction with DNA to a form that binds to DNA by intercalation. This scheme is interpreted as a biologically relevant logic AND gate with potential applications as a dually controlled anticancer drug.
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| 16. |
- Hesselstrand, Roger, et al.
(författare)
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High frequency ultrasound of skin involvement in systemic sclerosis - a follow-up study.
- 2015
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Ingår i: Arthritis Research and Therapy. - : Springer Science and Business Media LLC. - 1478-6362 .- 1478-6354. ; 17:1
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Tidskriftsartikel (refereegranskat)abstract
- High-frequency ultrasound offers a potential for objective and quantitative assessment of skin thickness and skin echogenicity in systemic sclerosis (SSc). Few studies have however assessed the longitudinal changes of skin involvement using ultrasound. The aim of the study was to investigate changes in skin thickness in early SSc using high frequency ultrasound during one year of follow-up in comparison to other measurements of skin fibrosis.
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| 17. |
- Huttunen, Henri J., et al.
(författare)
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Intraputamenal Cerebral Dopamine Neurotrophic Factor in Parkinson's Disease: A Randomized, Double-Blind, Multicenter Phase 1 Trial
- 2023
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Ingår i: Movement Disorders. - : John Wiley & Sons. - 0885-3185 .- 1531-8257. ; 38:7, s. 1209-1222
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Tidskriftsartikel (refereegranskat)abstract
- Background: Cerebral dopamine neurotrophic factor (CDNF) is an unconventional neurotrophic factor that protects dopamine neurons and improves motor function in animal models of Parkinson's disease (PD). Objective: The primary objectives of this study were to assess the safety and tolerability of both CDNF and the drug delivery system (DDS) in patients with PD of moderate severity. Methods: We assessed the safety and tolerability of monthly intraputamenal CDNF infusions in patients with PD using an investigational DDS, a bone-anchored transcutaneous port connected to four catheters. This phase 1 trial was divided into a placebo-controlled, double-blind, 6-month main study followed by an active-treatment 6-month extension. Eligible patients, aged 35 to 75 years, had moderate idiopathic PD for 5 to 15 years and Hoehn and Yahr score ≤ 3 (off state). Seventeen patients were randomized to placebo (n = 6), 0.4 mg CDNF (n = 6), or 1.2 mg CDNF (n = 5). The primary endpoints were safety and tolerability of CDNF and DDS and catheter implantation accuracy. Secondary endpoints were measures of PD symptoms, including Unified Parkinson's Disease Rating Scale, and DDS patency and port stability. Exploratory endpoints included motor symptom assessment (PKG, Global Kinetics Pty Ltd, Melbourne, Australia) and positron emission tomography using dopamine transporter radioligand [18F]FE-PE2I. Results: Drug-related adverse events were mild to moderate with no difference between placebo and treatment groups. No severe adverse events were associated with the drug, and device delivery accuracy met specification. The severe adverse events recorded were associated with the infusion procedure and did not reoccur after procedural modification. There were no significant changes between placebo and CDNF treatment groups in secondary endpoints between baseline and the end of the main and extension studies. Conclusions: Intraputamenally administered CDNF was safe and well tolerated, and possible signs of biological response to the drug were observed in individual patients. © 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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| 18. |
- Johansson, Peter, et al.
(författare)
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Association between quality of life and clinical parameters in patients with myeloproliferative neoplasms
- 2012
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Ingår i: Leukemia and Lymphoma. - : Informa UK Limited. - 1042-8194 .- 1029-2403. ; 53:3, s. 441-444
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Tidskriftsartikel (refereegranskat)abstract
- The Myeloproliferative Neoplasm Symptom Assessment Form (MPN-SAF) is a validated quality of life (QoL) instrument. In our Swedish cohort of 114 patients the symptomatic burden was found to be severe, with fatigue reported in 88% of the patients and reduced QoL in the majority of patients. Patients with primary myelofibrosis had the highest scores, low QoL, for most MPN-SAF items, compared to patients with polycythemia vera and essential thrombocythemia. Higher age showed significant associations with the BFI (Brief Fatigue Inventory) score, early satiety, concentration problems, dizziness, insomnia, cough and weight loss. Blood values, disease duration and myelosuppressive treatment did not significantly associate with any of the MPN-SAF items, with the exception of higher hemoglobin, which correlated with sad mood. Male patients with MPN scored significantly higher as regards sexual problems and weight loss compared to female patients. Overall, the MPN-SAF was found to be a valid instrument for assessing symptomatic burden among this population.
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| 19. |
- Karlsson, Johanna, 1973, et al.
(författare)
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Comparative Study of Immune Status to Infectious Agents in Elderly Patients with Multiple Myeloma, Waldenstrom's Macroglobulinemia, and Monoclonal Gammopathy of Undetermined Significance.
- 2011
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Ingår i: Clinical and vaccine immunology : CVI. - 1556-6811. ; 18:6, s. 969-77
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Tidskriftsartikel (refereegranskat)abstract
- Whereas patients with multiple myeloma (MM) have a well-documented susceptibility to infections, this has been less studied in other B-cell disorders, such as Waldenstrom's macroglobulinemia (WM) and monoclonal gammopathy of undetermined significance (MGUS). We investigated the humoral immunity to 24 different pathogens in elderly patients with MM (n = 25), WM (n = 16), and MGUS (n = 18) and in age-matched controls (n = 20). Antibody titers against pneumococci, staphylococcal alpha-toxin, tetanus and diphtheria toxoids, and varicella, mumps, and rubella viruses were most depressed in MM patients, next to lowest in WM and MGUS patients, and highest in the controls. In contrast, levels of antibodies specific for staphylococcal teichoic acid, Moraxella catarrhalis, candida, aspergillus, and measles virus were similarly decreased in MM and MGUS patients. Comparable titers in all study groups were seen against Haemophilus influenzae type b (Hib), borrelia, toxoplasma, and members of the herpesvirus family. Finally, a uniform lack of antibodies was noted against Streptococcus pyogenes, salmonella, yersinia, brucella, francisella, and herpes simplex virus type 2. To conclude, although MM patients displayed the most depressed humoral immunity, significantly decreased antibody levels were also evident in patients with WM and MGUS, particularly against Staphylococcus aureus, pneumococci, and varicella. Conversely, immunity was retained for Hib and certain herpesviruses in all study groups.
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| 20. |
- Karlsson, Johanna, 1973, et al.
(författare)
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Pneumococcal vaccine responses in elderly patients with multiple myeloma, Waldenstrom’s macroglobulinemia, and monoclonal gammopathy of undetermined significance
- 2013
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Ingår i: Trials in vaccinology. - : Elsevier BV. - 1879-4378. ; 2, s. 31-38
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Tidskriftsartikel (refereegranskat)abstract
- Background Vaccination with the 23-valent pneumococcal polysaccharide vaccine (PPV) has been recommended for elderly patients with B cell malignancies and dysfunctions because of their enhanced susceptibility to pneumococcal infections. More recent recommendations advocate the use of conjugate pneumococcal vaccines. Methods We compared responses to single dose vaccination with either PPV or the 7-valent pneumococcal conjugate vaccine (PCV7) in fifty-six patients ⩾60 years with a diagnosis of multiple myeloma (n = 24), Waldenstrom’s macroglobulinemia (n = 15) and the non-malignant B cell disorder monoclonal gammopathy of undetermined significance (MGUS) (n = 17), and 20 age-matched controls. Serum was collected prior to vaccination and 4–8 weeks later, and analyzed for IgG antibody levels to pneumococcal serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F by ELISA. Functional antibody activity towards pneumococcal serotypes 4 and 14 was measured using an opsonophagocytic killing assay (OPA). Results All patient groups had lower pre-vaccination IgG antibody and OPA titers to the investigated serotypes compared to the healthy controls. Following vaccination, myeloma patients responded with significant IgG titer increases to 1/7 serotypes and OPA titer increases to 1/2 serotypes. Corresponding IgG and OPA vaccine responses were 3/7 and 0/2 for Waldenstrom patients, 4/7 and 1/2 for MGUS patients, and 4/7 and 2/2 for the healthy controls, respectively. Notably high antibody levels without corresponding OPA titers were seen among a few myeloma patients indicating the presence of non-functional antibodies. Neither of the two vaccines elicited significantly higher serotype-specific IgG concentrations, OPA titers or antibody fold increases in any of the study groups. Hypogammaglobulinemia and ongoing chemotherapy were associated with poor vaccine responses in a multivariate analysis. Conclusion Our findings confirm that B cell malignancies and disorders among elderly patients are associated with suboptimal responses to pneumococcal vaccination. Single-dose PCV7 was not shown to be superior to PPV.
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| 21. |
- Karlsson, Johanna, 1973, et al.
(författare)
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Poor correlation between pneumococcal IgG and IgM titers and opsonophagocytic activity in vaccinated patients with multiple myeloma and Waldenstrom's macroglobulinemia
- 2016
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Ingår i: Clinical and Vaccine Immunology. - 1556-6811 .- 1556-679X. ; 23:4, s. 379-385
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Tidskriftsartikel (refereegranskat)abstract
- Patients with multiple myeloma and other B cell disorders respond poorly to pneumococcal vaccination. Vaccine responsiveness is commonly determined by measuring pneumococcal serotype-specific antibodies by enzyme-linked immunosorbent assay (ELISA), by a functional opsonophagocytosis assay (OPA), or by both assays. We compared the two methods in vaccinated elderly patients with multiple myeloma, Waldenstrom’s macroglobulinemia, and monoclonal gammopathy of undetermined significance (MGUS). Postvaccination sera from 45 patients (n=15 from each patient group) and 15 control subjects were analyzed by multiplexed OPA for pneumococcal serotypes 4, 6B, 14, and 23F, and the results were compared to IgG and IgM antibody titers measured by ELISA. While there were significant correlations between pneumococcal OPA and IgG titers for all serotypes among the control subjects (correlation coefficients [r] between 0.51 and 0.85), no significant correlations were seen for any of the investigated serotypes in the myeloma group (r.018 to 0.21) or in the group with Waldenstrom’s macroglobulinemia (borderline significant correlations for 2 of 4 serotypes). The MGUS group resembled the control group by having good agreement between the two test methods for 3 of 4 serotypes (r0.53 to 0.80). Pneumococcal postvaccination IgM titers were very low in the myeloma patients compared to the other groups and did not correlate with the OPA results. To summarize, our data indicate that ELISA measurements may overestimate antipneumococcal immunity in elderly subjects with B cell malignancies and that a functional antibody test should be used specifically for myeloma and Waldenstrom’s macroglobulinemia patients.
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| 22. |
- Khartsev, Sergiy, et al.
(författare)
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Comparative characteristics of Na0.5K0.5NbO 3 films on Pt by pulsed laser deposition and magnetron sputtering
- 2003
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Ingår i: Integrated Ferroelectrics. - : Informa UK Limited. - 1058-4587 .- 1607-8489. ; 55, s. 769-779
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Tidskriftsartikel (refereegranskat)abstract
- Ferroelectric Na0.5K0.5NbO3 (NKN) thin films were grown on the Pt80Ir20 polycrystalline substrates by pulsed laser deposition (PLD) and radio frequency-magnetron sputtering (RF) technique using the same stoichiometric Na0.5K 0.5NbO3 ceramic target. X-ray diffraction proved both PLD- and RF-made Na0.5K0.5NbOj/Pt80Ir20 films are single phase and have preferential c-axis orientation. Temperature dependence of dielectric permittivity reveals the presence of two phase transitions around 210 and 410°C. Capacitance vs. applied voltage C-V @ 100 kHz, I-V, and P-E hysteresis characteristics recorded for the vertical capacitive structures yielded loss tan δ = 0.026 and 0.016, tunability about 44.5 and 30% @ 100 kV/cm, Ohmic resistivity 6.7 × 1012 Ω·cm and 0.2 × 1012 Ω·cm, remnant polarization 11.7 and 9.7 μC/cm2, coercive field 28.0 and 94.6 kV/cm for PLD- and RF-films, respectively. Piezoelectric test carried out in hydrostatic conditions showed piezoelectric coefficient dH = 21 for PLD-NKN and 15 pC/N for RF-NKN film.
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| 23. |
- Kohler, Verena, 1992-, et al.
(författare)
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Nuclear Hsp104 safeguards the dormant translation machinery during quiescence
- 2024
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Ingår i: Nature Communications. - : Springer Nature. - 2041-1723. ; 15
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Tidskriftsartikel (refereegranskat)abstract
- The resilience of cellular proteostasis declines with age, which drives protein aggregation and compromises viability. The nucleus has emerged as a key quality control compartment that handles misfolded proteins produced by the cytosolic protein biosynthesis system. Here, we find that age-associated metabolic cues target the yeast protein disaggregase Hsp104 to the nucleus to maintain a functional nuclear proteome during quiescence. The switch to respiratory metabolism and the accompanying decrease in translation rates direct cytosolic Hsp104 to the nucleus to interact with latent translation initiation factor eIF2 and to suppress protein aggregation. Hindering Hsp104 from entering the nucleus in quiescent cells results in delayed re-entry into the cell cycle due to compromised resumption of protein synthesis. In sum, we report that cytosolic-nuclear partitioning of the Hsp104 disaggregase is a critical mechanism to protect the latent protein synthesis machinery during quiescence in yeast, ensuring the rapid restart of translation once nutrients are replenished.
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| 24. |
- Kugler, Veronika Mozhdeh, et al.
(författare)
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Low temperature growth and characterization of (Na,K)NbOx thin films
- 2003
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Ingår i: Journal of Crystal Growth. - 0022-0248 .- 1873-5002. ; 254:3-4, s. 400-404
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Tidskriftsartikel (refereegranskat)abstract
- Thin (Na,K)NbOx perovskite films (NKN) have been deposited on SiO2/Si(0 0 1) substrates at low temperatures, from 350°C to 550°C, by RF magnetron sputtering. The effects of substrate temperature on microstructure, electrical-, and mechanical properties of the NKN films have been studied. X-ray diffraction analysis revealed that films deposited at temperatures in the range of 450-550°C were crystalline, growing as a single phase, with a preferred orientation of (0 0 1). Films deposited at 350°C, were shown to be amorphous. The growth temperature had a strong influence on the electrical properties of the NKN films and the relative dielectric constants of the obtained films were in between 38 and 78. Variations of the mechanical properties of the NKN films were observed for different substrate temperatures: The elastic moduli and the hardness values ranged from 205±26 to 93±29 GPa, and from 12±2 to around 2 GPa, for films deposited at 550°C and 450°C, respectively.
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| 25. |
- Lankinen, Åsa, et al.
(författare)
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Fokusprojekt Lågriskmedel i växtskyddet
- 2019
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Rapport (populärvet., debatt m.m.)abstract
- Fokusgruppens syfte har varit att definiera kunskapsluckor avseende den praktiska användningen och implementeringen av alternativa medel med låg risk för bekämpning av skadegörare och sjukdomar inom jordbruk, trädgårdsodling och skogsbruk. Vi har utgått från en bred definition av medel med låg risk, som har omfattat både allmänkemikalier och växtskyddsmedel med låg risk (enligt gällande EU-lagstiftning). Trots att det idag finns ett ökat behov av alternativa verktyg inom växtskyddet och politiska mål om minimerad användning av kemiska medel, så är användningen av alternativa bekämpningsmedel i fältodlade grödor mycket begränsad. • En viktig faktor som styr och begränsar tillgängligheten av alternativa medel är EU-lagstiftningen för godkännande av dessa medel. För att kunna registrera ett medel behövs en investering från det företag som ansöker om godkännande, vilket kan vara en anledning till att medel inte blir tillgängliga på marknaden. En annan lagteknisk begränsning är ogynnsamma skatteregler för dessa medel. • Från ett användarperspektiv är bristande kunskap om hur effektiva dessa medel är, hur man bäst applicerar dem samt hur de kan integreras i befintliga växtskyddsstrategier en bidragande orsak till att de inte används fullt ut. • Rådgivningen pekar också på en otydlighet om vilka medel som får användas speciellt i ekologisk produktion och att användningen missgynnas av höga priser i kombination med en osäkerhet om hur effektiva dessa medel är. • I Jordbruksverkets rapport ”Hinder för ökad användning av alternativa bekämpningsmedel” (SJV, Rapport 2019:3), som medlemmar av fokusgruppen har varit med att skriva, är ett av förslagen en utökad rådgivningsverksamhet. Detta eftersom informationsinsatser och aktiv rådgivning kan påverka hur snabbt odlare accepterar och börjar använda ett växtskyddsmedel, speciellt om det har nya egenskaper (och en ny verkningsmekanism). Forskning visar att en ny åtgärd/metod inte bara ska Sammanfattning och slutsatser 5 passa in i befintliga verksamheter utan också passa med attityd och värderingar hos användaren. • Från ett forskningsperspektiv kan vi se ett klart behov av tillämpningsnära forskning framför allt för att få en ökad kunskap om hur alternativa bekämpningsmedel kan integreras i befintliga växtskyddsstrategier. En utmaning är den begränsade mängd forskningsmedel som finns att söka för denna typ av forskning. • Forskningen är ofta väldigt uppdelad mellan agrikultur, hortikultur och skogsbruk. Här skulle man kunna dra nytta av kunskap inom respektive system eftersom vissa aspekter är generella mellan olika system, åtminstone för vissa grödor/träd. • Från ett internationellt perspektiv kan vi se vinster med ett bättre samarbete med närliggande länder, tex Plant Biologicals Network (PBN) som koordineras från Danmark, men även engagemang inom det vidare EUperspektivet (bla lagar). • Ytterligare en slutsats från fokusgruppens arbete är att växtskyddsforskningen på SLU behöver samordnas bättre, tex genom att knyta samman de kompetenscentrum som finns idag – CBC och CKB – med nya strukturer som skulle kunna fokusera på i) analys av växtskadegörare och ii) lågrisk-metoder och hur dessa kan spela en roll i integrerat växtskydd (IPM). • ygarbeta tillsammans för att få till en bra samverkan och kunskapsutbyte.
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| 26. |
- Nejström, Malin, et al.
(författare)
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On Structural and Molecular Order in Cellulose Acetate Butyrate Films
- 2023
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Ingår i: Polymers. - : MDPI AG. - 2073-4360. ; 15:9
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Tidskriftsartikel (refereegranskat)abstract
- Cellulose acetate butyrate (CAB) is a possible candidate, being a raw material derived from renewable resources, to replace fossil-based materials. This is due to its thermoplastic properties and the relative ease with which it could be implemented within the existing industry. With a significant amount of variation in CAB on the market today, a knowledge gap has been identified regarding the understanding of the polymer structural arrangement in films. This relates to the underlying mechanisms that regulate CAB film material properties, insights that are important in product development. In this study, commercially available CAB was investigated with XRD, SEM, AFM, and TOPEM DSC in order to obtain physicochemical information related to its micro-structural features in solvent-cast films. The film-forming ability relates mostly to the number of hydroxyl groups, and the semi-crystallinity of the films depends on the type and position of the side groups along the cellulose backbone. The appearance of signs of possible cholesteric ordering in the films could be connected to higher amounts of hydroxyl groups along the backbone that disturb the helix arrangement, while the overall order was primarily related to the butyrate substitution and secondarily related to the molecular weight of the particular CAB studied. Cold crystallization was also observed in one CAB sample.
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| 27. |
- Sherk, Adam, et al.
(författare)
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Alcohol Consumption and the Physical Availability of Take-Away Alcohol : Systematic Reviews and Meta-Analyses of the Days and Hours of Sale and Outlet Density
- 2018
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Ingår i: Journal of Studies on Alcohol and Drugs. - : Alcohol Research Documentation, Inc.. - 1937-1888 .- 1938-4114. ; 79:1, s. 58-67
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Forskningsöversikt (refereegranskat)abstract
- Objective: Systematic reviews and meta-analyses were completed studying the effect of changes in the physical availability of take-away alcohol on per capita alcohol consumption. Previous reviews examining this topic have not focused on off-premise outlets where take-away alcohol is sold and have not completed meta-analyses. Method: Systematic reviews were conducted separately for policies affecting the temporal availability (days and hours of sale) and spatial availability (outlet density) of take-away alcohol. Studies were included up to December 2015. Quality criteria were used to select articles that studied the effect of changes in these policies on alcohol consumption with a focus on natural experiments. Random-effects meta-analyses were applied to produce the estimated effect of an additional day of sale on total and beverage-specific consumption. Results: Separate systematic reviews identifi ed seven studies regarding days and hours of sale and four studies regarding density. The majority of articles included in these systematic reviews, for days/hours of sale (7/7) and outlet density (3/4), concluded that restricting the physical availability of take-away alcohol reduces per capita alcohol consumption. Meta-analyses studying the ef-fect of adding one additional day of sale found that this was associated with per capita consumption increases of 3.4% (95% CI [2.7, 4.1]) for total alcohol, 5.3% (95% CI [3.2, 7.4]) for beer, 2.6% (95% CI [1.8, 3.5]) for wine, and 2.6% (95% CI [2.1, 3.2]) for spirits. The small number of included studies regarding hours of sale and density precluded meta-analysis. Conclusions: The results of this study suggest that decreasing the physical availability of take-away alcohol will decrease per capita consumption. As decreasing per capita consumption has been shown to reduce alcohol-related harm, restricting the physical availability of take-away alcohol would be expected to result in improvements to public health.
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| 28. |
- Tosal-Castano, Sergi, et al.
(författare)
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Snd3 controls nucleus-vacuole junctions in response to glucose signaling
- 2021
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Ingår i: Cell Reports. - : Elsevier BV. - 2211-1247. ; 34:3
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Tidskriftsartikel (refereegranskat)abstract
- Membrane contact sites facilitate the exchange of metabolites between organelles to support interorganellar communication. The nucleus-vacuole junctions (NVJs) establish physical contact between the perinuclear endoplasmic reticulum (ER) and the vacuole. Although the NVJ tethers are known, how NVJ abundance and composition are controlled in response to metabolic cues remains elusive. Here, we identify the ER protein Snd3 as central factor for NVJ formation. Snd3 interacts with NVJ tethers, supports their targeting to the contacts, and is essential for NVJ formation. Upon glucose exhaustion, Snd3 relocalizes from the ER to NVJs and promotes contact expansion regulated by central glucose signaling pathways. Glucose replenishment induces the rapid dissociation of Snd3 from the NVJs, preceding the slow disassembly of the junctions. In sum, this study identifies a key factor required for formation and regulation of NVJs and provides a paradigm for metabolic control of membrane contact sites.
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| 29. |
- Westwood, Sarah, et al.
(författare)
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The influence of insulin resistance on cerebrospinal fluid and plasma biomarkers of Alzheimer's pathology.
- 2017
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Ingår i: Alzheimer's research & therapy. - : Springer Science and Business Media LLC. - 1758-9193. ; 9:1
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Tidskriftsartikel (refereegranskat)abstract
- Insulin resistance (IR) has previously been associated with an increased risk of developing Alzheimer's disease (AD), although the relationship between IR and AD is not yet clear. Here, we examined the influence of IR on AD using plasma and cerebrospinal fluid (CSF) biomarkers related to IR and AD in cognitively healthy men. We also aimedto characterise the shared protein signatures between IR and AD.Fifty-eight cognitively healthy men, 28 IR and 30 non-IR (age and APOE ε4 matched), were drawn from the Metabolic Syndrome in Men study in Kuopio, Finland. CSF AD biomarkers (amyloid β-peptide (Aβ), total tau and tau phosphorylated at the Thr181 epitope) were examined with respect to IR. Targeted proteomics using ELISA and Luminex xMAP assays were performed to assess the influence of IR on previously identified CSF and plasma protein biomarker candidates of AD pathology. Furthermore, CSF and plasma SOMAscan was performed to discover proteins that associate with IR and CSF AD biomarkers.CSF AD biomarkers did not differ between IR and non-IR groups, although plasma insulin correlated with CSF Aβ/tau across the whole cohort. In total, 200 CSF and 487 plasma proteins were differentially expressed between IR and non-IR subjects, and significantly enriched pathways, many of which have been previously implicated in AD, were identified. CSF and plasma proteins significantly associated with CSF AD biomarkers were also discovered, and those sensitive to both IR and AD were identified.These data indicate that IR is not directly related to the level of CSF AD pathology in cognitively healthy men. Proteins that associated with both AD and IR are potential markers indicative of shared pathology.
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| 30. |
- Witzell, Johanna, et al.
(författare)
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Sugar beet extract induces defence against Phytophthora infestans in potato plants
- 2013
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Ingår i: European Journal of Plant Pathology. - : Springer Science and Business Media LLC. - 0929-1873 .- 1573-8469. ; 136, s. 261-271
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to find a natural and cheap agent that could induce defence responses in potato plants to combat Phytophthora infestans, which causes late blight disease that is one of the most devastating plant pathogens in agriculture. We tested whether a sugar beet extract (SBE), derived through a simple extraction procedure from a large-scale plant waste product, induced resistance under green-house conditions. In three potato genotypes differing in their level of resistance to P. infestans (two susceptible genotypes: Desiree and Bintje and one partially resistant: Ovatio), treatment with SBE resulted in significant reduction of the size of the infection lesions in a pattern similar to that seen with application of a known defence-inducing compound, beta-aminobutyric acid (BABA). Lower sporangial production was also observed on SBE-treated leaves, but the reduction in sporangial production was more pronounced after BABA treatment. SBE had no apparent toxic effect on the hyphal growth of the pathogen or on the germination of sporangia. Instead, SBE triggered pathogenesis-related protein (PR-1 and PR-2) induction which suggests that the protection conferred by SBE could be via induced resistance. An array of phenolic metabolites was found in the SBE that may contribute to the defence response.
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