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Sökning: WFRF:(Jansson Eva) > Uppsala universitet

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1.
  • Myhrinder, Anna Lanemo, 1975-, et al. (författare)
  • Molecular characterization of neoplastic and normal "sister" lymphoblastoid B-cell lines from chronic lymphocytic leukemia
  • 2013
  • Ingår i: Leukemia and Lymphoma. - : Informa UK Limited. - 1042-8194 .- 1029-2403. ; 54:8, s. 1769-1779
  • Tidskriftsartikel (refereegranskat)abstract
    • Chronic lymphocytic leukemia (CLL) B-cells resemble self-renewing CD5 + B-cells carrying auto/xeno-antigen-reactive B-cell receptors (BCRs) and multiple innate pattern-recognition receptors, such as Toll-like receptors and scavenger receptors. Integration of signals from BCRs with multiple surface membrane receptors determines whether the cells will be proliferating, anergic or apoptotic. To better understand the role of antigen in leukemogenesis, CLL cell lines producing monoclonal antibodies (mAbs) will facilitate structural analysis of antigens and supply DNA for genetic studies. We present here a comprehensive genotypic and phenotypic characterization of available CLL and normal B-cell-derived lymphoblastoid cell lines (LCLs) from the same individuals (n = 17). Authenticity and verification studies of CLL-patient origin were done by IGHV sequencing, fluorescence in situ hybridization (FISH) and DNA/short tandem repeat (STR) fingerprinting. Innate B-cell features, i.e. natural Ab production and CD5 receptors, were present in most CLL cell lines, but in none of the normal LCLs. This panel of immortalized CLL-derived cell lines is a valuable reference representing a renewable source of authentic Abs and DNA.
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2.
  • Rosén, Anders, et al. (författare)
  • Lymphoblastoid cell line with B1 cell characteristics established from a chronic lymphocytic leukemia clone by in vitro EBV infection
  • 2012
  • Ingår i: Oncoimmunology. - : Informa UK Limited. - 2162-4011 .- 2162-402X. ; 1:1, s. 18-27
  • Tidskriftsartikel (refereegranskat)abstract
    • Chronic lymphocytic leukemia (CLL) cells express the receptor for Epstein-Barr virus (EBV) and can be infected in vitro. Infected cells do not express the growth-promoting set of EBV-encoded genes and therefore they do not yield LCLs, in most experiments. With exceptional clones, lines were obtained however. We describe a new line, HG3, established by in vitro EBV-infection from an IGHV1-2 unmutated CLL patient clone. All cells expressed EBNA-2 and LMP-1, the EBV-encoded genes pivotal for transformation. The karyotype, FISH cytogenetics and SNP-array profile of the line and the patient's ex vivo clone showed biallelic 13q14 deletions with genomic loss of DLEU7, miR15a/miR16-1, the two micro-RNAs that are deleted in 50% of CLL cases. Further features of CLL cells were: expression of CD5/CD20/CD27/CD43 and release of IgM natural antibodies reacting with oxLDL-like epitopes on apoptotic cells (cf. stereotyped subset-1). Comparison with two LCLs established from normal B cells showed 32 genes expressed at higher levels (> 2-fold). Among these were LHX2 and LILRA. These genes may play a role in the development of the disease. LHX2 expression was shown in self-renewing multipotent hematopoietic stem cells, and LILRA4 codes for a receptor for bone marrow stromal cell antigen-2 that contributes to B cell development. Twenty-four genes were expressed at lower levels, among these PARD3 that is essential for asymmetric cell division. These genes may contribute to establish precursors of CLL clones by regulation of cellular phenotype in the hematopoietic compartment. Expression of CD5/CD20/CD27/CD43 and spontaneous production of natural antibodies may identify the CLL cell as a self-renewing B1 lymphocyte.
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3.
  • Anders, Alfjorden, et al. (författare)
  • Experimental challenge of Atlantic salmon (Salmo salar) with the diplomonad parasite Spironucleus salmonicida to characterize the infection cycle
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Experimental infections were performed of Atlantic salmon (Salmo salar) from the Baltic Sea region with the Diplomonad fish parasite Spironucleus salmonicida in order to define the infection cycle, specifically the time-line and putative routes of transmission. An oral infection protocol using axenic parasites was developed, as were new diagnostic tools using PCR and specific antibodies. We also produced firefly luciferase expressing S. salmonicida parasites that could be identified in the infected fish using in vivo and ex vivo imaging. The new tools made it possible to follow the S. salmonicida infection cycle in detail. Three different stages of the infection were identified: one initial intestinal stage, followed by a blood stage and a final tissue stage. Parasites intubated into the intestine attached to the intestinal surface and were identified in the blood after 1-3 weeks. Skin lesions and infections of the muscles, internal organs and eyes were seen 4-10 weeks after initiation of infection. Several morphologically different forms of S. salmonicida cells were detected in ex vivo cell-cultures of biopsies from skin lesions. By this infection trial we have been able to show that S. salmonicida may use several alternative routes of transmission. One alternative is the fecal-oral route, similar to other Diplomonad parasites but the parasites can also be excreted directly into the surrounding water from the mucous layer of the skin or from an ulcerated skin lesion. This information can be used to prevent the transmission of the parasite in fish farms.
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5.
  • Berndt, Sonja I., et al. (författare)
  • Genome-wide meta-analysis identifies 11 new loci for anthropometric traits and provides insights into genetic architecture
  • 2013
  • Ingår i: Nature Genetics. - : Springer Science and Business Media LLC. - 1061-4036 .- 1546-1718. ; 45:5, s. 501-U69
  • Tidskriftsartikel (refereegranskat)abstract
    • Approaches exploiting trait distribution extremes may be used to identify loci associated with common traits, but it is unknown whether these loci are generalizable to the broader population. In a genome-wide search for loci associated with the upper versus the lower 5th percentiles of body mass index, height and waist-to-hip ratio, as well as clinical classes of obesity, including up to 263,407 individuals of European ancestry, we identified 4 new loci (IGFBP4, H6PD, RSRC1 and PPP2R2A) influencing height detected in the distribution tails and 7 new loci (HNF4G, RPTOR, GNAT2, MRPS33P4, ADCY9, HS6ST3 and ZZZ3) for clinical classes of obesity. Further, we find a large overlap in genetic structure and the distribution of variants between traits based on extremes and the general population and little etiological heterogeneity between obesity subgroups.
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6.
  • Bjarnestam, Jesper, 1974- (författare)
  • En hållbar trafiklösning för nya Slussen? : Uppfattningar om hållbarhet och hållbar stadsutveckling i Slussenprojektet
  • 2011
  • Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • This thesis examines perceptions of sustainability and sustainable urban development among actors involved in the project of rebuilding Slussen in central Stockholm. Views on the suggested new traffic solution and what would make a sustainable solution, the concepts of sustainability and sustainable urban development and how these concepts are interpreted and applied as policy, are especially investigated. A semi-structured qualitative interview study has been carried out and the respondents include city officials, politicians, representatives of interest groups, consultants and researchers. Stockholm, European Green Capital in 2010, sets high goals for sustainability. As concept, sustainability is also frequently used in much of the city´s planning material such as the budget, environmental programme and urban development documents. However, it has not been included in the goals of the Slussen project. Even though, interviewees representing the city view the project as a sustainability project whereas other respondents clearly question this view. The study suggests that a determining factor for this division is how the sustainability concept is defined (or not), also how car traffic is viewed in urban sustainable development. The thesis shows that instead of planning for sustainable transportation, traditional business-as-usual traffic planning has dominated the Slussen project. The main reasons are that the new traffic solution, although including new walking and cycling bridges as well as a new bus terminal, includes planning for increased car traffic, an eight lane bridge to provide for it and a high degree of separation instead of integration of transport modes. Many of the interviewees also perceive of the suggested new main bridge as a motorway and the walking bridge as being both socially and culturally unsustainable in its long and narrow design. The new traffic solution in itself is viewed as unsustainable since it would bring about the abandonment of a more than 300 year old tradition of double and equal bridges at Slussen. Finally, the study suggests that the planned new traffic solution would have both looked different and been perceived of as more sustainable if sustainability had been included in the project goals. However, this would only have been the case if the concept was properly defined and implemented.
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7.
  • Brännholm Syrjälä, Maria, et al. (författare)
  • Health effects of reduced occupational sedentary behaviour in type 2 diabetes using a mobile health intervention : a study protocol for a 12-month randomized controlled trial—the ROSEBUD study
  • 2022
  • Ingår i: Trials. - : BioMed Central. - 1745-6215. ; 23:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Short-term trials conducted in adults with type 2 diabetes mellitus (T2DM) showed that reducing sedentary behaviour by performing regular short bouts of light-intensity physical activity enhances health. Moreover, support for reducing sedentary behaviour may be provided at a low cost via mobile health technology (mHealth). There are a wide range of mHealth solutions available including SMS text message reminders and activity trackers that monitor the physical activity level and notify the user of prolonged sitting periods. The aim of this study is to evaluate the effects of a mHealth intervention on sedentary behaviour and physical activity and the associated changes in health in adults with T2DM.Methods: A dual-arm, 12-month, randomized controlled trial (RCT) will be conducted within a nationwide Swedish collaboration for diabetes research in primary health care. Individuals with T2DM (n = 142) and mainly sedentary work will be recruited across primary health care centres in five regions in Sweden. Participants will be randomized (1:1) into two groups. A mHealth intervention group who will receive an activity tracker wristband (Garmin Vivofit4), regular SMS text message reminders, and counselling with a diabetes specialist nurse, or a comparator group who will receive counselling with a diabetes specialist nurse only. The primary outcomes are device-measured total sitting time and total number of steps (activPAL3). The secondary outcomes are fatigue, health-related quality of life and musculoskeletal problems (self-reported questionnaires), number of sick leave days (diaries), diabetes medications (clinical record review) and cardiometabolic biomarkers including waist circumference, mean blood pressure, HbA1c, HDL-cholesterol and triglycerides.Discussion: Successful interventions to increase physical activity among those with T2DM have been costly and long-term effectiveness remains uncertain. The use of mHealth technologies such as activity trackers and SMS text reminders may increase awareness of prolonged sedentary behaviour and encourage increase in regular physical activity. mHealth may, therefore, provide a valuable and novel tool to improve health outcomes and clinical management in those with T2DM. This 12-month RCT will evaluate longer-term effects of a mHealth intervention suitable for real-world primary health care settings.
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8.
  • Dahlgren, Eva, et al. (författare)
  • Sertoli-Leydig cell tumour in a postmenopausal woman showing all facets of the insulin resistance syndrome (IRS)
  • 2005
  • Ingår i: Ups J Med Sci. - 0300-9734. ; 110:3, s. 233-6
  • Tidskriftsartikel (refereegranskat)abstract
    • Sertoli-Leydig cell tumours are rare sex stromal tumours with an incidence of < 0.5% of all ovarian tumours. Most frequently this tumour occurs in young women with a history of amenorrhoea, hirsutism and lowered pitch. Here, we report on a woman with IRS, postmenopausal virilization and increased testosterone levels due to a Sertoli-Leydig cell tumour. This is the first case to suggest an association between IRS and Sertoli-Leydig cell tumours. Furthermore, we highlight the difficulties in detecting this ovarian tumour with sonography.
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9.
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10.
  • Dahlin, Maria, et al. (författare)
  • Transfer of dopamine in the olfactory pathway following nasal administration in mice
  • 2000
  • Ingår i: Pharmaceutical research. - 0724-8741 .- 1573-904X. ; 17:6, s. 737-742
  • Tidskriftsartikel (refereegranskat)abstract
    • PURPOSE: The aim of the study was to investigate whether dopamine is transferred along the olfactory pathway to the brain following nasal administration to mice. METHODS: [3H]-Dopamine was administered nasally or intravenously to female mice. Brain tissue samples were excised and the radioactive content was measured. The precise localisation of dopamine radioactivity in the brain was studied using autoradiography. The presence of dopamine or its metabolites in the olfactory bulb and mucosa was ascertained using thin layer chromatography (TLC). RESULTS: After administration of [3H]-dopamine into the right nostril, the amount of dopamine in the right bulb increased with time until. after 4 h, it was 27 times higher than in the left bulb. Among the other brain tissue samples, significantly higher amount of radioactivity was detected in the lateral olfactory tract. Radioactivity in the right olfactory bulb was shown by autoradiography to be selectively located in the peripheral layers 1 to 4 h after administration. Selective uptake of radioactivity was not seen in other regions of the brain. TLC data indicated that approximately 75% and 10% of the radioactivity in the olfactory bulb and mucosa, respectively, coeluted with dopamine. CONCLUSIONS: The results indicate that unchanged dopamine is transferred into the olfactory bulb following nasal administration of [3H]-dopamine.
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