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Sökning: WFRF:(Brun Arne)

  • Resultat 1-10 av 68
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  • Bjurberg, Maria, et al. (författare)
  • Early changes in 2-deoxy-2-[18F]fluoro-D-glucose metabolism in squamous-cell carcinoma during chemotherapy in vivo and in vitro.
  • 2009
  • Ingår i: Cancer Biotherapy & Radiopharmaceuticals. - Mary Ann Liebert, Inc.. - 1557-8852. ; 24:3, s. 327-332
  • Tidskriftsartikel (refereegranskat)abstract
    • AIM: The aim of this study was to investigate early changes in uptake of 2-deoxy-2-[(18)F]fluoro-D-glucose (FDG) in vivo and in vitro in a squamous-cell carcinoma (SCC) cell line originating from a human head and neck SCC during cytotoxic therapy with respect to metabolism in tumor cells and in surrounding stromal tissue. MATERIALS AND METHODS: In 60 nude mice with xenografted SCC, 50 animals were treated with cisplatin. Early changes in the tumor FDG uptake following therapy were evaluated sequentially with phosphor imaging. Using this technique, areas with focal hypermetabolism were detected. The cells creating the focal hypermetabolism were then identified histopathologically on the corresponding sections. In addition, early FDG uptake versus the number of viable tumor cells was measured in vitro following cisplatin treatment. RESULTS: An early transient increase in FDG uptake in tumor cells was seen on day 1 in treated tumors, followed by a rapid decrease confirmed by subsequent tumor regression. This metabolic flare was present in all treated tumors but not in the controls. In vitro, an increase in FDG uptake per cell was observed. CONCLUSIONS: Our results provide new insights into the early metabolic changes in squamous-cell carcinomas subjected to cytotoxic therapy and thus contribute to the discussion on the feasibility of early predictive PET studies.
  • Brun, Eva, et al. (författare)
  • Prognostic value of histopathological response to radiotherapy and microvessel density in oral squamous cell carcinomas
  • 2001
  • Ingår i: Acta Oncologica. - Taylor & Francis. - 1651-226X. ; 40:4, s. 491-496
  • Tidskriftsartikel (refereegranskat)abstract
    • The prognostic value of histopathological response to preoperative radiotherapy (50 Gy) in radically resected oral carcinomas was studied in 39 consecutive patients. Microvessel density (MVD) was evaluated for relation to radioresponse and outcome. Resected tumour tissue was examined histopathologically and response to radiotherapy was scored according to induced morphological changes. Pretreatment biopsies were stained with antibodies to von Willebrand factor to evaluate MVD in hot-spot regions, in stromal tissue and in tumour epithelial tissue. Histopathological response to radiotherapy was highly prognostic of local failures and survival (p = 0.002), though microscopic surgical radicality was obtained. In good responders to preoperative radiotherapy, the 5-year survival rate was 68% compared with 24% in poor responders. In 12 patients with local recurrence after radical surgery, 11 had poor histopathological radiotherapy responses. In univariate analysis, a high MVD score in tumour epithelium was associated with poor clinical outcome but MVD did not correlate with histopathological radiotherapy response.
  • Larsson, Elna-Marie, et al. (författare)
  • Magnetic resonance imaging and histopathology in dementia, clinically of frontotemporal type
  • 2000
  • Ingår i: Dementia and Geriatric Cognitive Disorders. - Karger. - 1420-8008. ; 11:3, s. 123-134
  • Tidskriftsartikel (refereegranskat)abstract
    • The magnetic resonance imaging (MRI) and computed tomography findings in 28 patients with the clinical diagnosis of frontotemporal dementia (FTD) were compared with the findings in a control group of 76 individuals without dementia or stroke. A pattern of frontal and temporal atrophy with predominantly frontal white matter changes was found in the FTD patients, and this was significantly different from the radiological findings in the control group. Six of the FTD patients have undergone autopsy. Histopathological evaluation showed a primary cortical degenerative disease (frontal lobe degeneration of non-Alzheimer type) in 3 of them, and primary white matter disorder, mainly frontal, of basically ischemic type (selective incomplete white matter infarction) in 3 of them. MRI could be a helpful tool to support the clinical diagnosis FTD, especially in young patients. MRI may also be helpful for the differentiation of a primary neurodegenerative from a mainly ischemic-vascular type of dementia.
  • Balbin, Milagros, et al. (författare)
  • A novel mutation in the β-protein coding region of the amyloid β-protein precursor (APP) gene
  • 1992
  • Ingår i: Human Genetics. - Springer. - 1432-1203. ; 89:5, s. 580-582
  • Tidskriftsartikel (refereegranskat)abstract
    • A novel mutation, a C to T transition at base pair 2124 in exon 17 of the amyloid beta-protein precursor (APP) gene, has been identified by direct sequencing of amplified DNA from two Alzheimer's disease (AD) patients. A simple oligonucleotide-hybridization procedure was developed to allow population studies of this DNA variation. The mutation, which is silent at the protein level, was present in 2 out of 12 investigated AD patients, in 1 out of 60 non-AD patients and in 1 out of 30 healthy individuals. The mutation can be used as a new marker for linkage studies involving the APP gene, although more comprehensive population studies are required to determine the status of the mutation as a possible risk factor for the development of AD.
  • Brown, J, et al. (författare)
  • Frontotemporal dementia linked to chromosome 3
  • 2004
  • Ingår i: Dementia and Geriatric Cognitive Disorders. - Karger. - 1420-8008. ; 17:4, s. 274-276
  • Tidskriftsartikel (refereegranskat)abstract
    • A large pedigree with autosomal dominant frontotemporal dementia has been identified. Positional cloning has linked the disease gene to the pericentromeric region of chromosome 3. Clinical, neuropsychological, imaging, pathological and molecular genetic data are presented. The genetic mutation responsible for the disease has not been identified.
  • Brun, Arne (författare)
  • Alzheimer´s and other neurodegenerative cognitive disorders. : A strategy to find cause and cure
  • 2018
  • Ingår i: Acta Scientiarum Lundensia. - Bertil RR Persson, Medical Radiation Physics, 22185 Lund, Sweden. - 1651-5013. ; 2018:006, s. 1-11
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of this treatise is to sketch out a strategy how to find a cause and cure for cognitive brain disorders and then primarily Alzheimer’s disease (AD) based on recent and little explored research progress. Step one is to find the cause. Recent evolution has supplied the human brain with new astrocytes which regarding their remarkable properties can be expected to harbor the cause of AD and several other cognitive neurodegenerative disorders. Plausible causes have already been proposed and will be accounted for in what follows. A cause proved or made plausible provides a good ground for finding a therapy. We must also be able to diagnose the disorder at an early stage ahead of widespread and severe brain damage for a treatment not to leave behind a crippling condition! This possibility appears now to become a reality since recent research has identified the same changes in the retina as in the brain. They can there be diagnosed with modern ophthalmological techniques and appear long before brain damage produces symptoms during the several decades long silent phase when AD is under way. After arrest of the disorder the neuronal plasticity can be expected to deliver repair, more the earlier the disorder is arrested.
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  • [1]234567Nästa
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