| 1. |
- Grövdal, Michael, et al.
(författare)
-
Negative effect of DNA hypermethylation on the outcome of intensive chemotherapy in older patients with high-risk myelodysplastic syndromes and acute myeloid leukemia following myelodysplastic syndrome
- 2007
-
Ingår i: Clinical Cancer Research. - 1078-0432 .- 1557-3265. ; 13:23, s. 7107-7112
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: Promoter hypermethylation of, for example, tumor-suppressor genes, is considered to be an important step in cancerogenesis and a negative risk factor for survival in patients with myelodysplastic syndromes (MDS); however, its role for response to therapy has not been determined. This study was designed to assess the effect of methylation status on the outcome of conventional induction chemotherapy. EXPERIMENTAL DESIGN: Sixty patients with high-risk MDS or acute myeloid leukemia following MDS were treated with standard doses of daunorubicin and 1-beta-d-arabinofuranosylcytosine. Standard prognostic variables and methylation status of the P15(ink4b) (P15), E-cadherin (CDH), and hypermethylated in cancer 1 (HIC) genes were analyzed before treatment. RESULTS: Forty percent of the patients achieved complete remission (CR). CR rate was lower in patients with high WBC counts (P = 0.03) and high CD34 expression on bone marrow cells (P = 0.02). Whereas P15 status alone was not significantly associated with CR rate (P = 0.25), no patient with hypermethylation of all three genes achieved CR (P = 0.03). Moreover, patients with CDH methylation showed a significantly lower CR rate (P = 0.008), and CDH methylation retained its prognostic value also in the multivariate analysis. Hypermethylation was associated with increased CD34 expression, but not with other known predictive factors for response, such as cytogenetic profile. CONCLUSIONS: We show for the first time a significant effect of methylation status on the outcome of conventional chemotherapy in high-risk MDS and acute myelogenous leukemia following MDS. Provided confirmed in an independent study, our results should be used as a basis for therapeutic decision-making in this patient group.
|
|
| 2. |
- Lauridsen, Jonas, et al.
(författare)
-
Deposition of Ti-Si-C-Ag nanocomposite coatings as electrical contact material
- 2010
-
Ingår i: Proceedings of the 56th IEEE Holm Conference on Electrical Contacts (HOLM). - : IEEE. - 9781424481743 ; , s. 288-294
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper is a brief review of our recent work and a follow up study on nanocomposite coatings comprising nanocrystalline TiC embedded in an amorphous SiC matrix (nc-TiC/a-SiC) with and without Ag additions applied as electrical contacts. These coating materials are deposited at very high deposition rates (>10 μm/h), to meet industrial demands of high productivity. Here we consider Ti-Si-C-Ag nanocomposite coatings with Ag content in the range of 0-22 at.% deposited in a pilot-plant or an industrial deposition system by dc magnetron sputtering from compound targets onto Si(100) and SiO2(100) substrates. The microstructure, electrical, and mechanical properties of the coatings were studied with transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, electrical contact resistance, resistivity, and nanoindentation measurements. Varying the deposition parameters bias and pressure within ranges typical of coating processing had no effect on the structure. A variation was, however, observed for the contact resistance, that was determined to be in the range 400-900 mΩ at a contact force between 1.9-2.65 N. The coatings with highest Ag content had the lowest contactresistance.
|
|
| 3. |
- Miller, Daniel J., et al.
(författare)
-
Low O-2 dissociation barrier on Pt(111) due to adsorbate-adsorbate interactions
- 2010
-
Ingår i: Journal of Chemical Physics. - : American Institute of Physics. - 0021-9606 .- 1089-7690. ; 133:22, s. 224701-
-
Tidskriftsartikel (refereegranskat)abstract
- O2 dissociation on Pt(111) has been followed at low and saturation coverage using temperature-programmed x-ray photoelectron spectroscopy and simulated with mean-field kinetic modeling, yielding dissociation (Ea) and desorption (Ed) barriers of 0.32 and 0.36 eV, respectively. DFT calculations show that Ea is strongly influenced by the O–O interatomic potential in the atomic final state: of the supercells considered, that which maximizes attractive third-nearest-neighbor interactions in the atomic final state yields both the lowest computed dissociation barrier (0.24 eV) and the best agreement with experiment. It is proposed that the effect of adsorbate-adsorbate interactions must be considered when modeling catalytic processes involving dissociative steps.
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
- Öberg Sysojev, Anton, et al.
(författare)
-
Genome-wide investigation of persistence with methotrexate treatment in early rheumatoid arthritis
- 2024
-
Ingår i: Rheumatology. - : Oxford University Press. - 1462-0324 .- 1462-0332. ; 63:5, s. 1221-1229
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives: To investigate the influence of genetic factors on persistence to treatment of early rheumatoid arthritis (RA) with methotrexate (MTX) monotherapy.Methods: We conducted a genome-wide association study (GWAS) in a sample of 3902 Swedish early RA patients initiating MTX in DMARD-monotherapy as their first ever DMARD. The outcome, short- and long-term persistence to this treatment, was defined as remaining on MTX at one and at three years, respectively, with no additional DMARDs added. As genetic predictors, we investigated individual SNPs, and a polygenic risk score (PRS) based on SNPs associated with RA risk. The SNP-based heritability of persistence was estimated overall and by RA serostatus.Results: No individual SNP reached genome-wide significance (p < 5e-8), neither for persistence at one nor at three years. The RA PRS was not significantly associated with persistence at one (RR = 0.98 (0.96-1.01)) nor three years (RR = 0.96 (0.93-1.00)). The heritability for persistence was estimated to be 0.45 (0.15-0.75) at one year and 0.14 (0-0.40) at three years. Results in seropositive RA were comparable to those in the analysis of RA overall, while heritability estimates and PRS RRs were attenuated towards the null in seronegative RA.Conclusions: Despite being the largest GWAS on an MTX treatment outcome to date, no genome-wide significant associations were detected. The modest heritability observed, coupled with the broad spread of suggestively associated loci, indicate that genetic influence is of polygenic nature. Nevertheless, persistence to MTX monotherapy was lower in patients with a greater genetic disposition, per the PRS, towards RA.
|
|
| 7. |
- Andersson, Agneta, et al.
(författare)
-
Health care and social welfare costs in home-based and hospital-based rehabilitation after stroke
- 2002
-
Ingår i: Scandinavian Journal of Caring Sciences. - : Wiley. - 0283-9318 .- 1471-6712. ; 16:4, s. 386-392
-
Tidskriftsartikel (refereegranskat)abstract
- During the 1990s most western European and Organization of Economic Cooperation and Development (OECD) countries experienced financial difficulties and were forced to cut back on or restrain health care expenditures. Home rehabilitation has received attention in recent years because of its potential for cost containment. Often forgotten, however, is the redistribution of costs from one caregiver to another. The aim of this study was to analyse whether a redistribution of costs occurs between health care providers (the County councils) and social welfare providers (the municipalities) in a comparison of home-based rehabilitation and hospital-based rehabilitation after stroke. The study population included 123 patients, 53 in the home-based rehabilitation group and 68 in the hospital-based rehabilitation group. The patients were followed up at 6 and 12 months after onset of stroke. Resource use over a 12-month period included acute hospital care, in-hospital rehabilitation, home rehabilitation and use of home-help service as well as nursing home living. The hospital-based rehabilitation group had significantly fewer hospitalization days after a decision was made about rehabilitation at the acute care ward and consequently the cost for the acute care period was significantly lower. The cost for the rehabilitation period was significantly lower in the home-based rehabilitation group. However, the cost for home help service was significantly higher in the home-based rehabilitation group. The total costs for the care episode did not differ between the two groups. The main finding of this study is that there seems to occur a redistribution of costs between health care providers and social welfare providers in home rehabilitation after stroke in a group of patients with mixed degree of impairment.
|
|
| 8. |
- Andersson, B Erik, et al.
(författare)
-
Incomplete degradation of polycyclic aromatic hydrocarbons in soil inoculated with wood-rotting fungi and their effect on the indigenous soil bacteria
- 2003
-
Ingår i: Environmental Toxicology and Chemistry. ; 22:6, s. 1238-43
-
Tidskriftsartikel (refereegranskat)abstract
- Soil artificially contaminated with fluorene, phenanthrene, pyrene, and benz[a]anthracene was inoculated with the wood-rotting fungi Pleurotus ostreatus and Antrodia vaillantii. During 12 weeks of incubation, polycyclic aromatic hydrocarbon (PAH) degradation and the formation of persistent degradation products were monitored by chemical analysis. In addition, the effect on the indigenous soil bacteria was studied by plate count techniques and by measuring the concentration of bacteria-specific phospholipid fatty acids (PLFAs). In both soils inoculated with fungi, the PAH degradation was enhanced compared to the control soil without fungi. The white-rot fungus P. ostreatus accelerated the degradation rate radically the first weeks, while the effect of the brown-rot fungus was more pronounced at later stages during the 12-week study. In a soil with no amendments, the final degradation result was similar to that in the soil with added fungi, although the degradation pattern for the individual PAHs was different. Furthermore, the degradation by P. ostreatus was accompanied by an accumulation of PAH metabolites, that is, 9-fluorenone, benz[a]anthracene-7,12-dione, and two compounds identified as 4-hydroxy-9-fluorenone and 4-oxapyrene-5-one, that was not seen in the other soils. The inoculation with the white-rot fungus also had a large negative effect on the indigenous soil bacteria. This could be an important drawback of using the white-rot fungus P. ostreatus in soil bioremediation since a sequential fungal–bacterial degradation probably is needed for a complete degradation of PAHs in soil. In the soil inoculated with A. vaillantii, on the other hand, no metabolites accumulated, and no negative effects were observed on the indigenous microorganisms.
|
|
| 9. |
|
|
| 10. |
- Andersson, Lars, et al.
(författare)
-
Diversity, health and ageing
- 2006. - 1
-
Ingår i: Ageing and diversity. - Bristol, UK : The Policy Press. - 9781861345479 ; , s. 45-60
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
