| 1. |
- Göransson, Jenny, 1978-, et al.
(författare)
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A single molecule array for digital targeted molecular analyses
- 2009
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Ingår i: Nucleic Acids Research. - England : Oxford University Press. - 0305-1048 .- 1362-4962. ; 37:1, s. e7-
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Tidskriftsartikel (refereegranskat)abstract
- We present a new random array format together with a decoding scheme for targeted multiplex digital molecular analyses. DNA samples are analyzed using multiplex sets of padlock or selector probes that create circular DNA molecules upon target recognition. The circularized DNA molecules are amplified through rolling-circle amplification (RCA) to generate amplified single molecules (ASMs). A random array is generated by immobilizing all ASMs on a microscopy glass slide. The ASMs are identified and counted through serial hybridizations of small sets of tag probes, according to a combinatorial decoding scheme. We show that random array format permits at least 10 iterations of hybridization, imaging and dehybridization, a process required for the combinatorial decoding scheme. We further investigated the quantitative dynamic range and precision of the random array format. Finally, as a demonstration, the decoding scheme was applied for multiplex quantitative analysis of genomic loci in samples having verified copy-number variations. Of 31 analyzed loci, all but one were correctly identified and responded according to the known copy-number variations. The decoding strategy is generic in that the target can be any biomolecule which has been encoded into a DNA circle via a molecular probing reaction.
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| 2. |
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| 3. |
- Alexandersson, Jenny, et al.
(författare)
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HR-strategier för regional tillväxt och samverkan? En studie av två arbetsmarknadsintermediärer
- 2011
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Syftet med denna rapport är att bidra till en ökad förståelse för hur två regionala intermediära organisationer, inom HR-området, arbetar med förändrings- och kompetensrelaterade frågor.En interaktiv forskningsansats har tillämpats vilket innebär att planering och genomförande av forskningsarbetet har skett i dialog med berörda praktiker. Det empiriska materialet utgörs främst av 12 intervjuer med personer som arbetar inom de studerade intermediära organisationerna.Resultaten i denna studie visar att det finns många likheter mellan de två studerade intermediära organisationerna. Båda erbjuder ett brett spektra av HR-tjänster, ägs av sina kundföretag och har en samverkande roll mellan kundföretagen. Resultaten visar också att de båda intermediärerna har utvecklat en relativt speciell roll som intermediärer som innebär att de, i vissa avseenden, arbetar både som en extern och en intern HR-resurs till sina kundföretag. Även när det gäller arbetets organisering visar resultaten på flera likheter mellan de studerade intermediära organisationerna. Personalen i båda intermediärorganisationerna arbetar mycket flexibelt och anpassar sitt arbetssätt efter kundernas behov och önskemål. Få standardiserade modeller eller arbetsverktyg används i arbetet och det finns inte något utvecklat system för dokumentation och kunskapsöverföring som används aktivt inom intermediärorganisationerna. Samtidigt tyder resultaten på att ena av de två organisationerna har en något mer fast struktur med tydligt definierade arbetsområden och roller. Det finns också vissa skillnader mellan organisationerna vad gäller hur man önskar att inrikta och organisera sitt arbete i framtiden. Vidare visar resultaten från denna studie att personalen, inom de båda studerade organisationerna, upplever att deras arbete kan bidra till att kundföretagen får nya perspektiv och synsätt. I bästa fall kan även arbetet bidra till att företagen kan arbeta mer strategiskt och att de lär sig hantera olika problematiska situationer på egen hand och får en ökad beredskap att hantera förändring och problem i framtiden. Samtidigt är många uppdrag av mer akut och kortsiktig karaktär vilket innebär att det kan vara svårt att bidra till mer långsiktiga resultat i kundföretagen.
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| 4. |
- Ambort, Daniel, 1978, et al.
(författare)
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Calcium and pH-dependent packing and release of the gel-forming MUC2 mucin.
- 2012
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Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 1091-6490 .- 0027-8424. ; 109:15, s. 5645-50
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Tidskriftsartikel (refereegranskat)abstract
- MUC2, the major colonic mucin, forms large polymers by N-terminal trimerization and C-terminal dimerization. Although the assembly process for MUC2 is established, it is not known how MUC2 is packed in the regulated secretory granulae of the goblet cell. When the N-terminal VWD1-D2-D'D3 domains (MUC2-N) were expressed in a goblet-like cell line, the protein was stored together with full-length MUC2. By mimicking the pH and calcium conditions of the secretory pathway we analyzed purified MUC2-N by gel filtration, density gradient centrifugation, and transmission electron microscopy. At pH 7.4 the MUC2-N trimer eluted as a single peak by gel filtration. At pH 6.2 with Ca(2+) it formed large aggregates that did not enter the gel filtration column but were made visible after density gradient centrifugation. Electron microscopy studies revealed that the aggregates were composed of rings also observed in secretory granulae of colon tissue sections. The MUC2-N aggregates were dissolved by removing Ca(2+) and raising pH. After release from goblet cells, the unfolded full-length MUC2 formed stratified layers. These findings suggest a model for mucin packing in the granulae and the mechanism for mucin release, unfolding, and expansion.
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| 5. |
- Andréasson, Maia, 1960, et al.
(författare)
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På jakt efter amerikasvenskan
- 2013
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Ingår i: Svenskans beskrivning / [SvB.] 32, Förhandlingar vid trettioandra sammankomsten för svenskans beskrivning, Karlstad den 13-14 oktober 2011 / redigerade av Björn Bihl, Peter Andersson & Lena Lötmarker. - Karlstad : Karlstads universitet. - 1102-3619. - 9789170634901 ; 32, s. 82-91
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Konferensbidrag (refereegranskat)
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| 6. |
- Berggren, Peter, 1971-, et al.
(författare)
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The importance of using the designated duty officers when assessing the medical response organization
- 2017
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- BackgroundAn important aspect of disaster medicine is to be proactive and respond quickly when disaster strikes. In Sweden, the role responsible for swift medical response on the regional level is the designated duty officer.MethodsA large exercise to assess national medical response ability was conducted. Seven medical regional staffs (a total of 93 individuals participated as tested participants) were involved in handling a large train accident scenario. The exercise was run for 5 hours, where the different regional staffs were located at their regular command posts. The exercise was organized using Emergo Train Systems.ResultsSeveral capabilities were identified during the exercise as important for the organization to maintain the ability to handle a similar event: documentation and operational picture, communication and terminology, command of resources, strategy for distribution of resources, national co-ordination, and exercise development.The designated duty officers were central to the exercise in several aspects: 1) in developing and verifying a realistic scenario and preparing background information, 2) as participants in the exercise, 3) assessors of the staffs’ behaviors, and 4) as domain experts when interpreting the exercise outcome.ConclusionsUsing subject matter experts is central to many research domains. However, the more complex a situation is the larger the demand of expertise is. The technical platform allows for coordinating complex exercises, whereas the subject matter expert in terms of the designated duty officer is required to guarantee validity and reliability in these large-scale exercises.Key messages:Running complex scenarios to train and test abilities requires subject matter experts in both planning, preparation, implementation, and assessment.Sophisticated simulator and training platforms, such as Emergo Train Systems, facilitates while the designated duty officers are necessary to guarantee validity and reliability in the exercise.
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| 7. |
- Bernhardt, Peter, 1966, et al.
(författare)
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Effects of treatment with (177)Lu-DOTA-Tyr(3)-octreotate on uptake of subsequent injection in carcinoid-bearing nude mice.
- 2007
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Ingår i: Cancer biotherapy & radiopharmaceuticals. - : Mary Ann Liebert Inc. - 1084-9785 .- 1557-8852. ; 22:5, s. 644-53
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The aim of this study was to analyze the effect therapeutic injections of (177)Lu-DOTA(0)-Tyr(3)]-octreotate (DOTATATE) had on the tumor uptake of a subsequent injection with (111)In-DOTATATE in GOT1-bearing nude mice. METHODS AND MATERIALS: Nude mice, xenografted with the human midgut carcinoid, GOT1, were first intravenously injected with a curative (30 MBq) or a suboptimal (7.5 MBq) amount of (177)Lu-DOTATATE. At various intervals thereafter (4-13 days), a second injection with (111)In-DOTATATE (0.5 MBq) was given. One (1) day after the second injection, the animals were sacrificed, tumor tissues collected, the tumor (111)In and (177)Lu activity concentration determined, and tumor regression/cell density was recorded. RESULTS: In animals given curative amounts, the uptake of (111)In was lower than in untreated animals. On the other hand, a second late injection (3-13 days) after suboptimal amounts resulted in a twofold higher tumor activity concentration versus untreated animals. When the uptake of the curative injection was corrected for tumor cell density, which decreased from 66% to 4% over 2 weeks, an enhanced uptake per tumor cell was observed. The curative and suboptimal amounts resulted in a different uptake and retention of (177)Lu in tumors. The suboptimal amount resulted in a constant activity concentration, while the curative amount resulted in an increased activity concentration over time. CONCLUSIONS: Our results, as presented in this paper, describe how the second injection in a fractionation protocol will be affected by the first therapeutic amount. This new information might be useful in the optimization of radionuclide therapy.
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| 8. |
- Blomberg, Anders, et al.
(författare)
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Chronic Airflow Limitation, Emphysema and Impaired Diffusing Capacity in Relation to Smoking Habits in a Swedish Middle-Aged Population.
- 2024
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Ingår i: Annals of the American Thoracic Society. - 2329-6933 .- 2325-6621.
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Tidskriftsartikel (refereegranskat)abstract
- RATIONALE: Chronic obstructive pulmonary disease (COPD) includes respiratory symptoms and chronic airflow limitation (CAL). In some cases, emphysema and impaired diffusing capacity for carbon monoxide (DLCO) are present, but characteristics and symptoms vary with smoking exposure.OBJECTIVES: To study the prevalence of CAL, emphysema and impaired DLCO in relation to smoking and respiratory symptoms in a middle-aged population.METHODS: We investigated 28,746 randomly invited individuals (52% women) aged 50-64 years across six Swedish sites. We performed spirometry, DLCO, high-resolution computed tomography (HRCT) and asked for smoking habits and respiratory symptoms. CAL was defined as post-bronchodilator forced expiratory volume in 1 second divided by forced expiratory volume (FEV1/FVC)<0.7.RESULTS: The overall prevalence was for CAL 8.8%, for impaired DLCO (DLCOCONCLUSIONS: In this large population-based study of middle-aged people, CAL and impaired DLCO were associated with common respiratory symptoms. Self-reported asthma was not associated with CAL in never-smokers. Our findings suggest that CAL in never-smokers signifies a separate clinical phenotype that may be monitored and, possibly, treated differently from smoking-related COPD. This article is open access and distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/).
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| 9. |
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| 10. |
- Byström, Pär, et al.
(författare)
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Substitution of top predators : effects of pike invasion in a subarctic lake
- 2007
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Ingår i: Freshwater Biology. - : John Wiley & Sons, Inc. - 0046-5070 .- 1365-2427. ; 52:7, s. 1271–1280-
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Tidskriftsartikel (refereegranskat)abstract
- 1. Invasions of top predators may have strong cascading effects in ecosystems affecting both prey species abundance and lower trophic levels. A recently discussed factor that may enhance species invasion is climate change and in this context, we studied the effects of an invasion of northern pike into a subarctic lake ecosystem formerly inhabited by the native top predator Arctic char and its prey fish, ninespined stickleback. 2. Our study demonstrated a strong change in fish community composition from a system with Arctic char as top predator and high densities of sticklebacks to a system with northern pike as top predator and very low densities of sticklebacks. A combination of both predation and competition from pike is the likely cause of the extinction of char. 3. The change in top predator species also cascaded down to primary consumers as both zooplankton and predator-sensitive macroinvertebrates increased in abundance. 4. Although the pike invasion coincided with increasing summer temperatures in the study area we have no conclusive evidence that the temperature increase is the causal mechanism behind the pike invasion. But still, our study provides possible effects of future pike invasions in mountain lakes related to climate change. We suggest that future pike invasions will have strong effects in lake ecosystems, both by replacing native top consumers and through cascading effects on lower trophic levels.
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