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Sökning: WFRF:(Ostensson E)

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  • Eriksson, T., et al. (författare)
  • Sibbaldia: a molecular phylogenetic study of a remarkably polyphyletic genus in Rosaceae
  • 2015
  • Ingår i: Plant Systematics and Evolution. - 0378-2697 .- 1615-6110. ; 301:1, s. 171-184
  • Tidskriftsartikel (refereegranskat)abstract
    • Using DNA sequence data from nuclear ribosomal ITS in combination with plastid trnLF spacer and trnL intron data, we show that Sibbaldia is a polyphyletic assemblage. It falls into five separate clades of Potentilleae, three within Fragariinae and two within Potentilla (Potentillinae sensu Sojak). To a large extent, our results are congruent with Sojak's findings based on morphological characters such as anther structure. Four of the Sibbaldia species included in this study remain in Sibbaldia, while S. adpressa is classified in Sibbaldianthe, S. perpusilloides is considered to represent a new genus in Fragariinae, Chamaecallis Smedmark, S. micropetala is nested within the Potentilla anserina clade, and four species belong to a basal clade of Potentilla. The phylogenetic affinity of Sibbaldiopsis is still unsettled, but one of the three species that have been classified in the genus is found to belong inside Sibbaldia, and it should be named Sibbaldia retusa (O.F. Muller) T. Erikss. Further study will show whether the remaining two species, Potentilla cuneifolia and P. miyabei, are more closely related to Sibbaldia, Sibbaldianthe, or if they make up a distinct lineage separate from either of these.
  • Ostensson, Ellinor, et al. (författare)
  • Projected cost-effectiveness of repeat high-risk human papillomavirus testing using self-collected vaginal samples in the Swedish cervical cancer screening program
  • 2013
  • Ingår i: Acta Obstetricia et Gynecologica Scandinavica. - 0001-6349 .- 1600-0412. ; 92:7, s. 830-840
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Human papillomavirus (HPV) testing is not currently used in primary cervical cancer screening in Sweden, and corresponding cost-effectiveness is unclear. Objective From a societal perspective, to evaluate the cost-effectiveness of high-risk (HR)-HPV testing using self-collected vaginal samples. Design A cost-effectiveness analysis. Setting The Swedish organized cervical cancer screening program. Methods We constructed a model to simulate the natural history of cervical cancer using Swedish data on cervical cancer risk. For the base-case analysis we evaluated two screening strategies with different screening intervals: (i) cytology screening throughout the woman's lifetime (i.e. conventional cytology strategy) and (ii) conventional cytology screening until age 35years, followed by HR-HPV testing using self-collected vaginal samples in women aged 35years (i.e. combination strategy). Sensitivity analyses were performed, varying model parameters over a significant range of values to identify cost-effective screening strategies. Main outcome measures Average lifetime cost, discounted and undiscounted life-years gained, reduction in cervical cancer risk, incremental cost-effectiveness ratios with and without the cost of added life-years. Results Depending on screening interval, the incremental cost-effectiveness ratios for the combination strategy ranged from Euro43000 to Euro180000 per life-years gained without the cost of added life-years, and from Euro74000 to Euro206000 with costs of added life-years included. Conclusion The combination strategy with a 5-year screening interval is potentially cost-effective compared with no screening, and with current screening practice when using a threshold value of Euro80000 per life-years gained.
  • Andersson, Sonia, et al. (författare)
  • Acceptance of Self-Sampling Among Long-Term Cervical Screening Non-Attenders with HPV-Positive Results : Promising Opportunity for Specific Cancer Education
  • 2019
  • Ingår i: Journal of Cancer Education. - : Springer. - 0885-8195 .- 1543-0154.
  • Tidskriftsartikel (refereegranskat)abstract
    • This study aims to investigate acceptance of vaginal self-sampling for high-risk human papilloma virus (HPV) among long-term screening non-attenders at increased cervical cancer risk and to identify leverage points to promote screening adherence among these women. Forty-three long-term screening non-attenders performed home vaginal self-sampling for HPV, had positive HPV results, and subsequently attended gynecologic examination. Sixteen (37.2%) had high-grade cervical intraepithelial neoplasia (CIN2 or 3), and two had invasive cervical cancer. Forty-one of these women completed a questionnaire concerning Specific Knowledge about HPV, CIN, and cervical cancer, potential barriers to screening and views about self-sampling. Results were compared with 479 women treated for CIN2+ who attended gynecologic follow-up and also performed self-sampling. Significant multivariate predictors of long-term non-attender status compared with referents were low Specific Knowledge, high confidence in self-sampling, and potential barriers-refraining from activity to attend gynecologic examination, needing another's help to attend, and long travel time. Non-attenders citing fear/refraining from gynecologic examination as why they preferred self-sampling significantly more often had lowest Specific Knowledge compared with other non-attenders. All non-attenders could envision themselves doing self-sampling again while only 74% of referents endorsed this statement (p = 0.0003). We conclude that HPV self-sampling is an acceptable option for women at increased cervical cancer risk who have been long-term screening non-attenders. Educational outreach to enhance Specific Knowledge about HPV, CIN and cervical cancer is critical. Those non-attenders who explicitly avoid gynecologic examinations need special attention. Trial Registry: Clinicaltrials.gov NCT02750124.
  • Pandey, Gaurav Kumar, et al. (författare)
  • The risk-associated long noncoding RNA NBAT-1 controls neuroblastoma progression by regulating cell proliferation and neuronal differentiation.
  • 2014
  • Ingår i: Cancer Cell. - 1535-6108 .- 1878-3686. ; 26:5, s. 722-737
  • Tidskriftsartikel (refereegranskat)abstract
    • Neuroblastoma is an embryonal tumor of the sympathetic nervous system and the most common extracranial tumor of childhood. By sequencing transcriptomes of low- and high-risk neuroblastomas, we detected differentially expressed annotated and nonannotated long noncoding RNAs (lncRNAs). We identified a lncRNA neuroblastoma associated transcript-1 (NBAT-1) as a biomarker significantly predicting clinical outcome of neuroblastoma. CpG methylation and a high-risk neuroblastoma associated SNP on chromosome 6p22 functionally contribute to NBAT-1 differential expression. Loss of NBAT-1 increases cellular proliferation and invasion. It controls these processes via epigenetic silencing of target genes. NBAT-1 loss affects neuronal differentiation through activation of the neuronal-specific transcription factor NRSF/REST. Thus, loss of NBAT-1 contributes to aggressive neuroblastoma by increasing proliferation and impairing differentiation of neuronal precursors.
  • Ranhem, Cecilia, et al. (författare)
  • Expression of LRIG proteins as possible prognostic factors in primary vaginal carcinoma
  • 2017
  • Ingår i: ; 12:8
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Primary vaginal carcinoma (PVC) is a rare malignancy. Established prognostic factors include tumour stage and age at diagnosis. The leucine-rich repeats and immunoglobuline-like domains (LRIG)-1 protein functions as a tumour suppressor, but less is known about the functions of LRIG2 and LRIG3. The present study aimed to evaluate the expression of LRIG proteins and analyse their possible associations with clinical characteristics and survival in a cohort of PVC patients.Methods: We used immunohistochemistry to investigate LRIG1, LRIG2, and LRIG3 expression in tumour samples from a consecutive cohort of 70 PVC patients. The association between LRIG protein expression and clinical characteristics and cancer-specific survival was investigated using univariate and multivariate analyses.Results: The majority of PVC patients (72%) had >50% LRIG1- and LRIG2-positive cells, and no or low LRIG3-positive cells. HPV status was significantly correlated with LRIG1 expression (p = 0.0047). Having high LRIG1 expression was significantly correlated with superior cancer-specific survival in univariate and multivariate analyses. LRIG2 and LRIG3 expression did not significantly correlate with clinical characteristics or survival.Conclusion: LRIG1 expression might be of interest as a prognostic marker in PVC patients, whereas the role of LRIG2 and LRIG3 expression remains to be clarified.
  • Östensson, Malin, 1984, et al. (författare)
  • A Possible Mechanism behind Autoimmune Disorders Discovered By Genome-Wide Linkage and Association Analysis in Celiac Disease
  • 2013
  • Ingår i: PLoS ONE. - : Public Library of Science. - 1932-6203. ; 8:8
  • Tidskriftsartikel (refereegranskat)abstract
    • Celiac disease is a common autoimmune disorder characterized by an intestinal inflammation triggered by gluten, a storage protein found in wheat, rye and barley. Similar to other autoimmune diseases such as type 1 diabetes, psoriasis and rheumatoid arthritis, celiac disease is the result of an immune response to self-antigens leading to tissue destruction and production of autoantibodies. Common diseases like celiac disease have a complex pattern of inheritance with inputs from both environmental as well as additive and non-additive genetic factors. In the past few years, Genome Wide Association Studies (GWAS) have been successful in finding genetic risk variants behind many common diseases and traits. To complement and add to the previous findings, we performed a GWAS including 206 trios from 97 nuclear Swedish and Norwegian families affected with celiac disease. By stratifying for HLA-DQ, we identified a new genome-wide significant risk locus covering the DUSP10 gene. To further investigate the associations from the GWAS we performed pathway analyses and two-locus interaction analyses. These analyses showed an over-representation of genes involved in type 2 diabetes and identified a set of candidate mechanisms and genes of which some were selected for mRNA expression analysis using small intestinal biopsies from 98 patients. Several genes were expressed differently in the small intestinal mucosa from patients with celiac autoimmunity compared to intestinal mucosa from control patients. From top-scoring regions we identified susceptibility genes in several categories: 1) polarity and epithelial cell functionality; 2) intestinal smooth muscle; 3) growth and energy homeostasis, including proline and glutamine metabolism; and finally 4) innate and adaptive immune system. These genes and pathways, including specific functions of DUSP10, together reveal a new potential biological mechanism that could influence the genesis of celiac disease, and possibly also other chronic disorders with an inflammatory component.
  • Aarnio, Riina, 1971-, et al. (författare)
  • Cost-effectiveness analysis of repeated self-sampling for HPV testing in primary cervical screening: a randomized study
  • 2020
  • Ingår i: ; 20:1
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • BackgroundHuman papillomavirus (HPV) testing is recommended in primary cervical screening to improve cancer prevention. An advantage of HPV testing is that it can be performed on self-samples, which could increase population coverage and result in a more efficient strategy to identify women at risk of developing cervical cancer. Our objective was to assess whether repeated self-sampling for HPV testing is cost-effective in comparison with Pap smear cytology for detection of cervical intraepithelial neoplasia grade 2 or more (CIN2+) in increasing participation rate in primary cervical screening.MethodsA cost-effectiveness analysis (CEA) was performed on data from a previously published randomized clinical study including 36 390 women aged 30–49 years. Participants were randomized either to perform repeated self-sampling of vaginal fluid for HPV testing (n = 17 997, HPV self-sampling arm) or to midwife-collected Pap smears for cytological analysis (n = 18 393, Pap smear arm).ResultsSelf-sampling for HPV testing led to 1633 more screened women and 107 more histologically diagnosed CIN2+ at a lower cost vs. midwife-collected Pap smears (€ 228 642 vs. € 781 139). ConclusionsThis study projected that repeated self-sampling for HPV testing increased participation and detection of CIN2+ at a lower cost than midwife-collected Pap smears in primary cervical screening. Offering women a home-based self-sampling may therefore be a more cost-effective alternative than clinic-based screening. 
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