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Träfflista för sökning "L773:0250 7005 OR L773:1791 7530 srt2:(1995-1999)"

Sökning: L773:0250 7005 OR L773:1791 7530 > (1995-1999)

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1.
  • Backlin, Carin, et al. (författare)
  • Immunohistochemical expression of insulin-like growth factor 1 and its receptor in normal and neoplastic human adrenal cortex
  • 1995
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 15:6B, s. 2453-2459
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND:Insulin-like growth factor 1 (IGF-1) may influence cellular growth, differentiation and secretion.MATERIAL AND METHODS:Cryosectioned normal human adrenal glands (n = 6), cortical adenoma (n = 21), and carcinoma (n = 17) were stained immunohistochemically for IGF-1 and its receptor, and human adrenocortical cancer cells expressing the receptor were analysed for influences on proliferation.RESULTS:Normal cortical parenchyma generally displayed faint IGF-1 reactivity and intracellular receptor staining. Similar labelling encompassed the adenomas, but only 6 of them were receptor reactive. IGF-1 expression was conspicuous in 11 carcinomas, and 6 of them displayed cell surface receptor reactivity. All aldosterone producing lesions were receptor antibody unreactive. Recombinant IGF-1 dose-dependently stimulated the cell proliferation, and this effect was reversed by the receptor antibody.CONCLUSION:IGF-1 may interact with function and proliferation of the human adrenal cortex with particular reference to cortical carcinomas lacking discernible aldosterone excess.
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2.
  • Edgren, M, et al. (författare)
  • Biological characteristics of adrenocortical carcinoma : A study of p53, IGF, EGF-r, Ki-67 and PCNA in 17 adrenocortical carcinomas
  • 1997
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 17:2B, s. 1303-1310
  • Tidskriftsartikel (refereegranskat)abstract
    • Adrenocortical carcinoma (ACC) is a rare neoplasm with a poor prognosis. Prognostic factors are needed to identify patients who should be treated aggressively and those for which a less aggressive approach is warranted. As a result of advances within the field of immunohistochemistry, investigations of Ki-67, PCNA, IGF, EGF-r and p53 were performed in 17 ACC. The aim of this study was to clarify the role of Ki-67, PCNA, EGF-r, IGF and p53 in correlation to tumour behaviour and outcome. This retrospective study includes 16 patients, 10 women and 6 men, with a median age of 46 years. Nine tumours were hormonally functioning and 7 were non-functioning. The results obtained revealed that all tumours expressed PCNA and Ki-67 with median values of 59% and 14%, respectively, while p53 was negative in 88%, IGF negative in 82% and EGF-r positive in 94% of the tumours. No correlation was found between p53, IGF, EGF-r and survival rate. There was no interdependence between PCNA and Ki-67, or between PCNA, Ki-67 and the survival rate.
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3.
  • Mahteme, H, et al. (författare)
  • 5-FU uptake in liver metastases after intravenous and intraperitoneal administration : an autoradiographic study in the rat
  • 1998
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 18:2A, s. 943-949
  • Tidskriftsartikel (refereegranskat)abstract
    • AIM:To analyse 5-fluorouracil (5-FU) uptake in hepatic metastases and normal tissues after intravenous (i.v.), intraperitoneal (i.p.e.) and intraportal (IPO) administration.METHODS AND RESULTS:A total of 18 inbred rats with hepatic metastases were injected with 14C-labelled 5-FU either through the i.v. (n = 7), i.p.e (n = 7) or IPO (n = 4) route. Radioactivity was visualised autoradiographically and quantified by computer-based image analysis. After 20 minutes, 10 i.v. injected tumours showed a higher amount of radioactivity (mean +/- SD) 23.8 +/- 7.8 than 6 i.p.e. injected (16.5 +/- 5.1, P = 0.06). At 2 hours, 9 i.v. injected metastases contained more radioactivity (49.6 +/- 9.2) than 19 i.p.e. injected tumours (28.2 + 11.3, P = 0.00003). After 24 hours, 2 i.p.e. injected tumours had higher radioactivity (mean 25.2) compared with 7 i.v. injected (7.6 +/- 4.1). IPO administration did not confer higher radioactivity at any time point. When the calculations were based on average metastatic radioactivity of individual rats, the difference between i.v. and i.p.e. injected rats was still present at 2 hours.CONCLUSION:These results indicate that early tumour 5-FU uptake after intraperitoneal and intraportal administration may be inferior to that after intravenous injection. Deposition of the drug in the peritoneal cavity may, however, act as a slow release preparation giving continuous drug exposure for prolonged periods of time. These results suggest a role for combined intravenous and intraperitoneal adjuvant therapy.
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4.
  • Mahteme, Haile, et al. (författare)
  • Adjuvant 131I-anti-CEA-antibody radioimmunotherapy inhibits the development of experimental colonic carcinoma liver metastases
  • 1998
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 18:2A, s. 843-848
  • Tidskriftsartikel (refereegranskat)abstract
    • Adjuvant radioimmunotherapy (RIT) for human colonic cancer was performed in a nude rat model of experimental liver metastases. Thirty-three rats were injected intraportally through a mesenteric vein with 5 x 10(6) cells from the human colonic cancer cell line LS174T. Within half an hour, 20 MBq (n = 2), 75 MBq (n = 5), or 150 MBq (n = 10) of the 131I-labelled anti- carcinoembryonic antigen (CEA) monoclonal antibody (MAb) 38S1 was administered intravenously (i.v.), whereas control groups received either i.v. saline injections (n = 12) or 150 MBq of the irrelevant 131I-labelled MAb 79C (n = 4). Decay corrected whole-body data showed that more than 80% of the initially MAb-bound radioiodine was excreted during the first 2 weeks. Whole- body clearance and blood clearance of 131I-38S1 and 131I-79C were essentially similar. At sacrifice 5-7 weeks after administration, neither 20 MBq nor 75MBq 131I-38S1 significantly prevented the development of liver metastases. By contrast, with 150 MBq, no metastases formed in the animals treated with MAb 131I-38S1 or 131I-79C. A radiation induced effect on the haematopoietic system was found in the 150MBq dosage groups. It is concluded that the inhibition of tumour induction was not strictly dependent on a radiation dose delivered by a tumour-specific MAb. Since a non-tumour-specific 131I-MAb, in a smaller group of animals, proved equally efficacious in preventing tumour growth, the total body 131I dose was probably the major contributing factor.
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5.
  • Wang, M B, et al. (författare)
  • Detection of chromosome 11q13 amplification in head and neck cancer using fluorescence in situ hybridization
  • 1999
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 19:2A, s. 925-931
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND:Head and neck squamous cell carcinoma (HNSCC) remains a cancer with one of the lowest five-year survival rates. Despite a better understanding of the disease and recent advances in diagnosis and treatment, survival rates for HNSCC patients have not improved. Chromosomal abnormalities are common in HNSCC, and aberrations of chromosome 11q13 have been correlated with a poor prognosis.MATERIALS AND METHODS:In this study we utilized fluorescence in situ hybridization (FISH) to determine the incidence of 11q13 amplification in twenty primary HNSCC tumors. INT-2 was used as the 11q13 probe, and 9 and 11 centromeric probes were used as controls.RESULTS:Polysomy, greater than two copies of chromosome 11, was found in 2 of 20 tumors. INT2 (11q13) amplification was found in 3 other tumors.CONCLUSIONS:These preliminary studies indicate tht analysis of a larger sample of tumors using FISH may yield important diagnostic and prognostic information about head and neck tumors. 
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