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Träfflista för sökning "AMNE:(MEDICAL AND HEALTH SCIENCES Clinical Medicine Cancer and Oncology) srt2:(1985-1989);srt2:(1988)"

Sökning: AMNE:(MEDICAL AND HEALTH SCIENCES Clinical Medicine Cancer and Oncology) > (1985-1989) > (1988)

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1.
  • Olafsson, Isleifur, et al. (författare)
  • Production, characterization and use of monoclonal antibodies against the major extracellular human cysteine proteinase inhibitors cystatin C and kininogen
  • 1988
  • Ingår i: Scandinavian Journal of Clinical & Laboratory Investigation. - Informa Healthcare. - 1502-7686. ; 48:6, s. 573-582
  • Tidskriftsartikel (refereegranskat)abstract
    • Murine monoclonal antibodies against the major cysteine proteinase inhibitors of human biological fluids, cystatin C and kininogen, were produced. The cystatin C antibody, HCC3, with a Ka of 2times107 l/mol, increased the inhibition of papain by cystatin C and was suitable for use in immunoblotting, immunohistochemistry and in the construction of a sensitive sandwich enzyme immunoassay for quantification of cystatin C. It recognized not only free cystatin C but also cystatin C in complexes with cysteine proteinases. The kininogen antibody, HK4, was directed against the third, cysteine proteinase inhibitory domain of the heavy chain of kininogen (Ka=1times107 l/mol), but did not influence the papain inhibitory activity of kininogen. It reacted with free kininogen as well as kininogen in complex with cysteine proteinases. Both antibodies could be used for the production of specific immunosorbents.
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2.
  • Ekberg, Lars, et al. (författare)
  • What margins should be added to the clinical target volume in radiotherapy treatment planning for lung cancer?
  • 1988
  • Ingår i: Radiotherapy and Oncology. - Elsevier. - 1879-0887. ; 48:1, s. 71-77
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The planning target volume in radiotherapy treatment planning takes into account both movements of the clinical target volume (CTV) and set-up deviations. MATERIALS AND METHODS: A group of patients who received radiotherapy for lung cancer were studied. In order to measure the CTV movements due to respiration and other internal organ motions, fluoroscopy was performed for 20 patients. To study the accuracy and reproducibility of patient and beam set-up, 553 electronic portal images from 20 patients were evaluated. Discrepancies between planned and actual field positions were measured and the systematic and random errors were identified. The combined effect of these geometrical variations was evaluated. RESULTS: The average CTV movement with quiet respiration was about 2.4 mm in the medio-lateral and dorso-ventral directions. Movement in the cranio-caudal direction was on average 3.9 mm with a range of 0-12 mm. The systematic set-up errors were on average 2.0 mm in the transversal plane and 3.0 mm in the cranio-caudal direction. The random errors can be described by their standard deviations of 3.2 and 2.6 mm. In this study, the combined effect of the two parameters (CTV movement and set-up deviations) varied between 7.5 and 10.3 mm in different anatomical directions. CONCLUSIONS: In our daily clinical routine, we use a margin of 11 mm in the transversal plane and 15 mm cranially and caudally, also taking into account other unquantified variations and uncertainties.
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3.
  • Kjellén, Elisabeth, et al. (författare)
  • Comparison of low dose nicotinamide versus benzamide, administered per os, as radiosensitizers in a C3H mammary carcinoma
  • 1988
  • Ingår i: Radiotherapy and Oncology. - Elsevier. - 1879-0887. ; 12:4, s. 327-331
  • Tidskriftsartikel (refereegranskat)abstract
    • We have evaluated if any differences in tumor radiosensitization exist between the two adenosine diphosphate ribosyl transferase (ADPRT) inhibitors nicotinamide and benzamide at fractionated low doses. A significant radiosensitizing effect with nicotinamide at a 10 mg/kg per day dose was found in the tumor model used. We found, however, no radiosensitizing effect with benzamide given according to this schedule.
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5.
  • Bergenius, J., et al. (författare)
  • The relationship between caloric response, oculomotor dysfunction and size of cerebello-pontine angle tumours
  • 1988
  • Ingår i: Acta Oto-Laryngologica. - Taylor & Francis. - 0001-6489. ; 106:5-6, s. 361-367
  • Tidskriftsartikel (refereegranskat)abstract
    • Seventy-nine consecutive patients, 70 patients with acoustic neurinomas (ACN) and 9 patients with cerebello-pontine angle tumours of other etiology (o-CPA) were analysed with respect to tumour size and the result of the caloric and oculomotor tests. The size of the tumour was judged by the largest diameter calculated from the computerized tomography. A highly significant linear relationship between tumour size and caloric side difference was found for the group of ACN patients who had normal oculomotor function. A unilateral loss of caloric response on the tumour side was found in 75% of the ACN patients with tumours larger than 20 mm, but not in any of the ACN patients with tumours smaller than 10 mm. Oculomotor dysfunction (OMD), defined as disturbed pursuit eye movements and/or gaze nystagmus was frequently found in the patients with ACN larger than 20 mm (77%), and was present in all but one of the o-CPA patients. However, the caloric response on the tumour side was significantly more impaired in the group of ACN patients with OMD than in the o-CPA group. A combined view of the oculomotor and caloric test results offers a possibility to obtain a rough estimate of tumour size as well as to distinguish ACNs from other types of tumours in the cerebello-pontine angle.
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6.
  • Dohlsten, M, et al. (författare)
  • Lymphocyte subpopulations and lymphokine production in children with constitutional aplastic anemia
  • 1988
  • Ingår i: Pediatric Hematology & Oncology. - Hemisphere Pub. Corp.. - 1521-0669. ; 5:2, s. 143-151
  • Tidskriftsartikel (refereegranskat)abstract
    • The expression of lymphocyte surface markers as well as the production of interleukin-2 (IL-2) and interferon-gamma (IFN) by mitogen-stimulated peripheral blood mononuclear cells (MNC) have been studied in five children with constitutional aplastic anemia. A significantly reduced T4/T8 ratio was found and two of five patients also had a reduced percentage of B cells. One patient had a high percentage of HLA-DR positive T8+ cells, very suggestive of a high degree of circulating activated T suppressor/cytotoxic cells. IL-2 production was reduced in two patients, whereas IFN production was only reduced in one of these. The abnormalities found correlate with the duration of the bone marrow failure. The patients with the longest duration of bone marrow failure also exhibited the lowest T4/T8 ratio. No spontaneous IFN production was detected in any of the patients. There was no clinical benefit or reversal of the immune abnormalities during and following treatment with cimetidine and cyclosporine A in two patients.
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7.
  • Blomqvist, G, et al. (författare)
  • Differences in lodgement of tumour cells in muscle and liver
  • 1988
  • Ingår i: Clinical and Experimental Metastasis. - Springer. - 1573-7276. ; 6:4, s. 285-289
  • Tidskriftsartikel (refereegranskat)abstract
    • Differences in the lodgement of circulating tumour cells in various organs are considered an important factor in metastatic organ selection. The present vital microscopic studies show that the pattern of intravascular arrest of tumour cells in muscle after intra-arterial injection is similar to that observed earlier, in the liver, after intraportal injection. However, parallel isotope studies on the lodgement process (at 5 min and 3 h after injection) showed that the tumour cells trapped in the muscle microvasculature were destroyed at a higher rate than in the liver. Tumour cells kept in test tubes, and thus not being subjected to the shearing forces of the circulation, had a higher survival rate than cells trapped in the muscle. The results indicate that stronger retardation forces acting on the tumour cells in muscle (arterial dissemination) than in the liver (venous dissemination) may be one mechanism behind the increased tumour cell destruction in muscle.
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8.
  • JOHANSSON, BERTIL, et al. (författare)
  • Breakprone chromosome bands in fibroblasts from patients with non‐Hodgkin's lymphoma do not coincide with bands involved in primary rearrangements in non‐Hodgkin's lymphomas
  • 1988
  • Ingår i: Hereditas. - Wiley-Blackwell. - 0018-0661. ; 109:1, s. 131-137
  • Tidskriftsartikel (refereegranskat)abstract
    • The distribution of breakpoints in structural chromosome aberrations (chromatid and chromosome gaps, breaks, and exchanges) was studied in skin fibroblasts from 35 untreated patients with non‐Hodgkin's lymphoma (NHL) and 39 controls. A total of 227 aberrations in the NHL group and 260 in the control group could be assigned to specific chromosome bands. The distribution of breakpoints was nonrandom in both groups (p<0.001), with excessive breakage in 17 bands among the NHL patients and in 21 among the controls. Two of the hot spots in the NHL group (6q21,14q24) and three in the control group (2q33,6q21, 6q25) coincided with the 60 chromosome bands that are targets for primary chromosome abnormalities in NHL. We conclude that the chromosome bands involved in primary structural abnormalities in lymphoma cells are not constitutionally breakprone in NHL patients.
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9.
  • JOHANSSON, BERTIL, et al. (författare)
  • Normal frequency of structural chromosome aberrations in fibroblasts from patients with non‐Hodgkin's lymphoma
  • 1988
  • Ingår i: Hereditas. - Wiley-Blackwell. - 0018-0661. ; 109:2, s. 277-280
  • Tidskriftsartikel (refereegranskat)abstract
    • The incidence of chromosome aberrations, i.e., chromatid and chromosome gaps, breaks, and exchanges, was studied in cultured skin fibroblasts from 25 untreated patients with non‐Hodgkin's lymphoma (NHL) and 26 controls. The mean frequencies of aberrant cells, and gap, break, and gap+break events per 100 metaphases were 4.2, 1.9, 2.8, and 4.7 in the NHL group, and 5.1, 2.6, 3.2, and 5.8 in the control group. None of these parameters differed significantly between the groups, indicating that constitutional chromosomal instability is not related to the development of NHL. In the total material there was a significant (P<0.05) increase with age in the number of aberrant cells.
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10.
  • Kristoffersson, Ulf, et al. (författare)
  • Trisomy 5 and t(5;14)(q11;q32) as the sole abnormalities in two different clones from a centroblastic non-Hodgkin's lymphoma
  • 1988
  • Ingår i: Cancer Genetics and Cytogenetics. - Elsevier. - 0165-4608. ; 36:2, s. 173-176
  • Tidskriftsartikel (refereegranskat)abstract
    • A 62-year-old previously healthy woman presented with a centroblastic non-Hodgkin's lymphoma in the thyroid. Chromosome analysis revealed two unrelated clones, 47,XX,+5 and 46,XX,-14,+der(14)t(5;14)(q11;q32). The two clones may reflect a polyclonal origin, or they may be the descendants of the same neoplastically rearranged cell. In the latter case, the clonal aberrations are either secondary to an event detectable only at the molecular level, or one of them is a primary cytogenetic event while the other arose through clonal evolution with loss of the primary aberration. The best candidate for the primary change would be trisomy 5. Trisomy 5 has previously been associated with lymphomas with diffuse, large, noncleaved morphology, a group within the Working Formulation largely equivalent to centroblastic lymphomas in the Kiel classification. Our findings thus support the notion that trisomy 5 may be associated with centroblastic/diffuse, large, noncleaved lymphomas.
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