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Träfflista för sökning "WFRF:(Åberg Fredrik) srt2:(2000-2019)"

Sökning: WFRF:(Åberg Fredrik) > (2000-2019)

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1.
  • Willgren, David, et al. (författare)
  • Adventsuppropet problematiskt
  • 2012
  • Ingår i: Dagen. - 1652-5264.
  • Tidskriftsartikel (populärvet., debatt m.m.)abstract
    • "Vi har problem med Adventsuppropet och den privilegierade ställning som den kristna tron förutsätts ha i det, skriver 18 pastorer och församlingsledare."
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4.
  • Åberg, N David, 1970, et al. (författare)
  • Insulin-like growth factor-I increases astrocyte intercellular gap junctional communication and connexin43 expression in vitro.
  • 2003
  • Ingår i: Journal of neuroscience research. - : Wiley. - 0360-4012. ; 74:1, s. 12-22
  • Tidskriftsartikel (refereegranskat)abstract
    • Connexin43 (cx43) forms gap junctions in astrocytes, and these gap junctions mediate intercellular communication by providing transport of low-molecular-weight metabolites and ions. We have recently shown that systemic growth hormone increases cx43 in the brain. One possibility was that local brain insulin-like growth factor-I (IGF-I) could mediate the effect by acting directly on astrocytes. In the present study, we examined the effects of direct application of recombinant human IGF-I (rhIGF-I) on astrocytes in primary culture concerning cx43 protein expression and gap junctional communication (GJC). After 24 hr of stimulation with rhIGF-I under serum-free conditions, the GJC and cx43 protein were analyzed. Administration of 30 ng/ml rhIGF-I increased the GJC and the abundance of cx43 protein. Cell proliferation of the astrocytes was not significantly increased by rhIGF-I at this concentration. However, a higher concentration of rhIGF-I (150 ng/ml) had no effect on GJC/cx43 but increased cell proliferation. Because of the important modulatory role of IGF binding proteins (IGFBPs) on IGF-I action, we analyzed IGFBPs in conditioned media. In cultures with a low abundance of IGFBPs (especially IGFBP-2), the GJC response to 30 ng/ml rhIGF-I was 81%, compared with the average of 25%. Finally, as a control, insulin was given in equimolar concentrations. However, GJC was not affected, which suggests that rhIGF-I acted via IGF-I receptors. In summary, the data show that rhIGF-I may increase GJC/cx43, whereas a higher concentration of rhIGF-I--at which stimulation of proliferation occurred--did not affect GJC/cx43. Furthermore, IGFBP-2 appeared to modulate the action of rhIGF-I on GJC in astrocytes by a paracrine mechanism.
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5.
  • Åberg, Veronica, 1976-, et al. (författare)
  • Microwave-assisted decarboxylation of bicyclic 2-pyridone scaffolds and identification of A beta-peptide aggregation inhibitors
  • 2005
  • Ingår i: Organic and biomolecular chemistry. - London, U.K. : Royal Society of Chemistry. - 1477-0520 .- 1477-0539. ; 3:15, s. 2817-2823
  • Tidskriftsartikel (refereegranskat)abstract
    • A reagent-free microwave-assisted decarboxylation procedure for carboxylic acid functionalized bicyclic 2-pyridones has been developed. This new method, based on microwave heating at 220 degrees C for 600 seconds in N-methyl pyrrolidone (NMP), proved to be practical and very efficient, resulting in decarboxylated 2-pyridones in near-quantitative yields. The decarboxylated products and the intermediate 2-pyridones in the form of carboxylic acid methyl esters and carboxylic acids were screened for their effect on A beta-peptide aggregation. Two out of the 21 2-pyridones described in this study inhibited amyloid formation of the Alzheimer A beta(1-40) peptide. The effect was seen even at a 4 : 1 ratio of 2-pyridone and monomeric A beta-peptide.
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6.
  • Ahlberg, Mats Steinholtz, et al. (författare)
  • PCASTt/SPCG-17-A randomised trial of active surveillance in prostate cancer: Rationale and design
  • 2019
  • Ingår i: BMJ Open. - : BMJ. - 2044-6055. ; 9
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction Overtreatment of localised prostate cancer is substantial despite increased use of active surveillance. No randomised trials help define how to monitor patients or when to initiate treatment with curative intent. Methods and analysis A randomised, multicentre, intervention trial designed to evaluate the safety of an MRI-based active surveillance protocol, with standardised triggers for repeated biopsies and radical treatment. The aim is to reduce overtreatment of prostate cancer. 2000 men will be randomly allocated to either surveillance according to current practice or to standardised triggers at centres in Sweden, Norway, Finland and the UK. Men diagnosed in the past 12 months with prostate cancer, ≤T2a, prostate-specific antigen (PSA) <15 ng/mL, PSA density ≤0.2 ng/mL/cc, any International Society of Urological Pathology (ISUP) grade 1 are eligible. Men with ISUP grade 2 in <30% of cores on systematic biopsy and <10 mm cancer in one core on systematic or targeted biopsy are also eligible. Men diagnosed on systematic biopsy should have an MRI and targeted biopsies against Prostate Imaging and Reporting Data System V.2 3-5 lesions before inclusion. Identical follow-up in the two study arms: biannual PSA testing, yearly clinical examination and MRI every second year. In the experimental arm, standardised triggers based on MRI and PSA density elicit repeated biopsies. MRI and histopathological progression trigger radical treatment. Primary outcome measure is progression-free survival. Secondary outcome measures are cumulative incidence of metastatic disease, treatments with curative intent, pT3-4 at radical prostatectomy, switch to watchful waiting, prostate cancer mortality and quality of life. Inclusion started in October 2016 and in October 2018; 275 patients have been enrolled. Ethics and dissemination Ethical approval was obtained in each participating country. Results for the primary and secondary outcome measures will be submitted for publication in peer-reviewed journals. Trial registration number NCT02914873.
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7.
  • Cegelski, Lynette, et al. (författare)
  • Small-molecule inhibitors target Escherichia coli amyloid biogenesis and biofilm formation
  • 2009
  • Ingår i: Nature Chemical Biology. - : Nature Publishing Group. - 1552-4450 .- 1552-4469. ; 5:12, s. 913-919
  • Tidskriftsartikel (refereegranskat)abstract
    • Curli are functional extracellular amyloid fibers produced by uropathogenic Escherichia coli (UPEC) and other Enterobacteriaceae. Ring-fused 2-pyridones, such as FN075 and BibC6, inhibited curli biogenesis in UPEC and prevented the in vitro polymerization of the major curli subunit protein CsgA. The curlicides FN075 and BibC6 share a common chemical lineage with other ring-fused 2-pyridones termed pilicides. Pilicides inhibit the assembly of type1pili, which are required for pathogenesis during urinary tract infection. Notably, the curlicides retained pilicide activities and inhibited both curli-dependent and type 1–dependent biofilms. Furthermore, pretreatment of UPEC with FN075 significantly attenuated virulence in a mouse model of urinary tract infection. Curli and type 1pili exhibited exclusive and independent roles in promoting UPEC biofilms, and curli provided a fitness advantage in vivo. Thus, the ability of FN075 to block the biogenesis of both curli and type 1pili endows unique anti-biofilm and anti-virulence activities on these compounds.
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9.
  • Ek, Fredrik, et al. (författare)
  • Behavioral Analysis of Dopaminergic Activation in Zebrafish and Rats Reveals Similar Phenotypes
  • 2016
  • Ingår i: Acs Chemical Neuroscience. - : American Chemical Society (ACS). - 1948-7193. ; 7:5, s. 633-646
  • Tidskriftsartikel (refereegranskat)abstract
    • Zebrafish is emerging as a complement to mammals in behavioral studies; however, there is a lack of comparative studies with rodents and humans to establish the zebrafish as a predictive translational model. Here we present a detailed phenotype evaluation of zebrafish larvae, measuring 300-3000 variables and analyzing them using multivariate analysis to identify the most important ones for further evaluations. The dopamine agonist apomorphine has previously been shown to have a complex U-shaped dose response relationship in the variable distance traveled. In this study, we focused on breaking down distance traveled into more detailed behavioral phenotypes for both zebrafish and rats and identified in the multivariate analysis low and high dose phenotypes with characteristic behavioral features. Further analysis of single parameters also identified an increased activity at the lowest concentration indicative of a U-shaped dose response. Apomorphine increased the distance of each swim movement (bout) at both high and low doses, but the underlying behavior of this increase is different; at high dose, both bout duration and frequency increased whereas bout max speed was higher at low dose. Larvae also displayed differences in place preference. The low dose phenotype spent more time in the center, indicative of an anxiolytic effect, while the high-dose phenotype had a wall preference. These dose-dependent effects corroborated findings in a parallel rat study and previous observations in humans. The translational value of pharmacological zebrafish studies was further evaluated by comparing the amino acid sequence of the dopamine receptors (D-1-D-4), between zebrafish, rats and humans. Humans and zebrafish share 100% of the amino acids in the binding site for D-1 and D-3 whereas D-2 and D-4 receptors share 85-95%. Molecular modeling of dopamine D2 and D4 receptors indicated that nonconserved amino acids have limited influence on important ligand receptor interactions.
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10.
  • Forsell, Anders, 1978- (författare)
  • Kommunala ideal och politisk verklighet. : En jämförande fallstudie av frisinnad politisk organisering i Filipstad och Skövde, ca 1880-1920.
  • 2014
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Most studies of emerging Swedish parties and politics have mainly focused on the Swedish Social Democrats and their struggle for democracy and political power, most as a prelude  to the so called ”Swedish Model”. Competing parties have received attention from historians on the national level, but their local origin remains to large extent an open field.The aim of this study is to investigate how local political factors shaped the emerging liberal party organizations in two small Swedish towns. By a case-oriented comparison two towns are contrasted, Skövde in Skaraborg county and Filipstad in Värmland.This thesis suggests that the distinction between national politics and municipal government, based on the interests of economic elites, was transformed during the period 1880-1920. During this period local elections and local government became increasingly sites for political struggle between different parties, with new agendas.With a framework that considered parties in light of their functions rather than organizational types and theoretical concepts borrowed from the sociology of social movements, the thesis main results suggest that political mobilization and liberal party-formation was depending on the local political traditions.The theoretical framework made it possible to pinpoint both similarities and differences between the cases. The results of the study indicate that the historical tradition is central to parties to emerge and flourish. This suggests that it is more meaningful to focus attention on local and regional processes to understand the historical development than has previously been done.
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