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Sökning: WFRF:(Einarsson G.)

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  • Ericzon, B G, et al. (författare)
  • Secretion and composition of bile after human liver transplantation: studies on the effects of cyclosporine and tacrolimus
  • 1997
  • Ingår i: Transplantation. - 0041-1337. ; 63:1, s. 74-80
  • Tidskriftsartikel (refereegranskat)abstract
    • Cyclosporine (CsA) and tacrolimus (FK506) have recently been reported to inhibit canalicular transport of bile acids in vitro and thereby possibly induce cholestasis. A relative reduction of chenodeoxycholic acid (CDCA) has been observed after liver transplantation when CsA is used as immunosuppressant. We tested the hypothesis that CsA induces cholestasis and reduces CDCA secretion as compared with treatment with monoclonal antibodies (OKT3), and that CsA differs from FK506 with regard to its effects on biliary lipid secretion.Bile flow, biliary lipid secretion rates, and biliary bile acid composition were determined during the first 10 days after transplantation in 29 liver transplant recipients. Two prospective randomized studies were performed that compared CsA and OKT3 and compared CsA- and FK506-based regimens. In study 1, bile acid output averaged 0.75±0.15 µmol/min in the CsA I group and 0.54±0.11 µmol/min in the OKT3 group on postoperative day 1. Bile flow and bile acid output then increased, and there was no significant difference between the two groups. The relative proportion of CDCA decreased to the same extent in both groups. In study 2, mean bile acid outputs on postoperative day 1 were 0.57±0.26 µmol/min and 0.55±0.15 µmol/min in the CsA 2 and FK506 groups, respectively. The following increase in bile acid secretion was significantly larger in the FK506 group. After transplantation, the relative proportion of CDCA decreased with time in both groups, but the reduction was more rapid in the FK506 group.In conclusion, CsA did not inhibit bile secretion during short-term treatment after liver transplantation. Compared with patients given CsA-based treatment, patients with FK506-based treatment recovered bile secretion more rapidly.
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  • Sigmundsson, F., et al. (författare)
  • Segmented lateral dyke growth in a rifting event at Bardarbunga volcanic system, Iceland
  • 2015
  • Ingår i: Nature. - 0028-0836. ; 517:7533, s. 191-U158
  • Tidskriftsartikel (refereegranskat)abstract
    • Crust at many divergent plate boundaries forms primarily by the injection of vertical sheet-like dykes, some tens of kilometres long(1). Previous models of rifting events indicate either lateral dyke growth away from a feeding source, with propagation rates decreasing as the dyke lengthens(2-4), or magma flowing vertically into dykes from an underlying source(5,6), with the role of topography on the evolution of lateral dykes not clear. Here we show how a recent segmented dyke intrusion in the Bardarbunga volcanic system grew laterally for more than 45 kilometres at a variable rate, with topography influencing the direction of propagation. Barriers at the ends of each segment were overcome by the build-up of pressure in the dyke end; then a new segment formed and dyke lengthening temporarily peaked. The dyke evolution, which occurred primarily over 14 days, was revealed by propagating seismicity, ground deformation mapped by Global Positioning System(GPS), interferometric analysis of satellite radar images (InSAR), and graben formation. The strike of the dyke segments varies from an initially radial direction away from the Bardarbunga caldera, towards alignment with that expected from regional stress at the distal end. A model minimizing the combined strain and gravitational potential energy explains the propagation path. Dyke opening and seismicity focused at the most distal segment at any given time, and were simultaneous with magma source deflation and slow collapse at the Bardarbunga caldera, accompanied by a series of magnitude M > 5 earthquakes. Dyke growth was slowed down by an effusive fissure eruption near the end of the dyke. Lateral dyke growth with segment barrier breaking by pressure build-up in the dyke distal end explains how focused upwelling of magma under central volcanoes is effectively redistributed over long distances to create new upper crust at divergent plate boundaries.
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5.
  • Söderdahl, G, et al. (författare)
  • Ursodeoxycholic acid increased bile flow and affects bile composition in the early postoperative phase following liver transplantation
  • 1998
  • Ingår i: Transplant International. - 0934-0874 .- 1432-2277. ; 11:Suppl 1, s. S231-S238
  • Tidskriftsartikel (refereegranskat)abstract
    • Orally given ursodeoxycholic acid (UDCA) has beneficial effects on laboratory parameters in different cholestatic conditions. In order to investigate the effect on early graft function after liver transplantation, 33 patients were randomized to receive either UDCA 15 mg/kg per day or placebo from the 1st postoperative day until 3 months after transplantation. All liver grafts produced bile within 24 h after revascularization. In both groups there was an increasing bile flow each day until day 5 after transplantation. This increase was more pronounced in the UDCA group where the flow on day 2 reached a mean value of 183 +/- 28 ml/day compared to 106 +/- 17 ml/day in the placebo group (P < 0.05). The average daily volume of bile produced during the first 10 days was also found to be higher in the UDCA group compared to the placebo group (242 +/- 20 ml vs 176 +/- 18 ml, P < 0.02). In the UDCA group a significant decrease in total bile acid output between the 5th and 10th postoperative days was found, while in the placebo group the amount of bile acids excreted remained stable over time. The composition of bile differed between the two groups with an increase in the portion of UDCA in the UDCA group from the 2nd postoperative day (25% vs 4.6%, P < 0.0003). The fraction of UDCA then remained high during the whole study period with a peak at day 3 when 38.1 +/- 6.6% of the bile acids consisted of UDCA. In the placebo group, the fraction of UDCA was low from the beginning and diminished further over time. Prophylactic UDCA treatment was found to have a significant positive impact on the ALT level during the 4th and 5th postoperative days, but had no effect on bilirubin or GGT in the early postoperative phase (days 1-10). No differences in cyclosporine requirement were found between the two groups.
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6.
  • Bill-Axelson, Anna, et al. (författare)
  • Radical prostatectomy versus watchful waiting in localized prostate cancer : the Scandinavian prostate cancer group-4 randomized trial
  • 2008
  • Ingår i: Journal of the National Cancer Institute. - 0027-8874 .- 1460-2105. ; 100:16, s. 1144-54
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The benefit of radical prostatectomy in patients with early prostate cancer has been assessed in only one randomized trial. In 2005, we reported that radical prostatectomy improved prostate cancer survival compared with watchful waiting after a median of 8.2 years of follow-up. We now report results after 3 more years of follow-up. METHODS: From October 1, 1989, through February 28, 1999, 695 men with clinically localized prostate cancer were randomly assigned to radical prostatectomy (n = 347) or watchful waiting (n = 348). Follow-up was complete through December 31, 2006, with histopathologic review and blinded evaluation of causes of death. Relative risks (RRs) were estimated using the Cox proportional hazards model. Statistical tests were two-sided. RESULTS: During a median of 10.8 years of follow-up (range = 3 weeks to 17.2 years), 137 men in the surgery group and 156 in the watchful waiting group died (P = .09). For 47 of the 347 men (13.5%) who were randomly assigned to surgery and 68 of the 348 men (19.5%) who were not, death was due to prostate cancer. The difference in cumulative incidence of death due to prostate cancer remained stable after about 10 years of follow-up. At 12 years, 12.5% of the surgery group and 17.9% of the watchful waiting group had died of prostate cancer (difference = 5.4%, 95% confidence interval [CI] = 0.2 to 11.1%), for a relative risk of 0.65 (95% CI = 0.45 to 0.94; P = .03). The difference in cumulative incidence of distant metastases did not increase beyond 10 years of follow-up. At 12 years, 19.3% of men in the surgery group and 26% of men in the watchful waiting group had been diagnosed with distant metastases (difference = 6.7%, 95% CI = 0.2 to 13.2%), for a relative risk of 0.65 (95% CI = 0.47 to 0.88; P = .006). Among men who underwent radical prostatectomy, those with extracapsular tumor growth had 14 times the risk of prostate cancer death as those without it (RR = 14.2, 95% CI = 3.3 to 61.8; P < .001). CONCLUSION: Radical prostatectomy reduces prostate cancer mortality and risk of metastases with little or no further increase in benefit 10 or more years after surgery.
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  • Lindgren, G., et al. (författare)
  • Limited number of patrilines in horse domestication.
  • 2004
  • Ingår i: Nature Genetics. ; :36, s. 335-336
  • Tidskriftsartikel (refereegranskat)abstract
    • Genetic studies using mitochondrial DNA (mtDNA) have identified extensive matrilinear diversity among domestic horses. Here, we show that this high degree of polymorphism is not matched by a corresponding patrilinear diversity of the male-specific Y chromosome. In fact, a screening for single-nucleotide polymorphisms (SNPs) in 14.3 kb of noncoding Y chromosome sequence among 52 male horses of 15 different breeds did not identify a single segregation site. These observations are consistent with a strong sex-bias in the domestication process, with few stallions contributing genetically to the domestic horse.
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10.
  • Stacey, Simon N, et al. (författare)
  • A germline variant in the TP53 polyadenylation signal confers cancer susceptibility.
  • 2011
  • Ingår i: Nature Genetics. - 1061-4036 .- 1546-1718. ; 43:11, s. 1098-103
  • Tidskriftsartikel (refereegranskat)abstract
    • To identify new risk variants for cutaneous basal cell carcinoma, we performed a genome-wide association study of 16 million SNPs identified through whole-genome sequencing of 457 Icelanders. We imputed genotypes for 41,675 Illumina SNP chip-typed Icelanders and their relatives. In the discovery phase, the strongest signal came from rs78378222[C] (odds ratio (OR) = 2.36, P = 5.2 × 10(-17)), which has a frequency of 0.0192 in the Icelandic population. We then confirmed this association in non-Icelandic samples (OR = 1.75, P = 0.0060; overall OR = 2.16, P = 2.2 × 10(-20)). rs78378222 is in the 3' untranslated region of TP53 and changes the AATAAA polyadenylation signal to AATACA, resulting in impaired 3'-end processing of TP53 mRNA. Investigation of other tumor types identified associations of this SNP with prostate cancer (OR = 1.44, P = 2.4 × 10(-6)), glioma (OR = 2.35, P = 1.0 × 10(-5)) and colorectal adenoma (OR = 1.39, P = 1.6 × 10(-4)). However, we observed no effect for breast cancer, a common Li-Fraumeni syndrome tumor (OR = 1.06, P = 0.57, 95% confidence interval 0.88-1.27).
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