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Seite 1 von 315 Ergebnisse
Thymidine phosphorylase and hypoxia-inducible factor 1-α expression in clinical stage II/III rectal cancer: association with response to neoadjuvant chemoradiation therapy and prognosis.
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The aim of this study was to determine whether pretreatment status of thymidine phosphorylase (TP), and hypoxia-inducible factor alpha (HIF-1α) could predict pathologic response to neoadjuvant chemoradiation therapy with oxaliplatin and capecitabine (XELOXART) and outcomes for clinical stage II/III
[Hypoxia augments the killing effect of herpes simplex virus thymidine kinase gene expression actuated by the promoter of the vascular endothelial growth factor gene on human hepatocellular tumor cells].
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OBJECTIVE
To investigate the killing effect of herpes simplex virus thymidine kinase gene expression actuated by the promoter of the vascular endothelial growth factor gene on human hepatocellular tumor cells under hypoxic condition.
METHODS
Recombinant adenoviral vectors, AdVEGF-tk and AdVEGF-GFP,
Effects of hypoxia on the uptake of tritiated thymidine, L-leucine, L-methionine and FDG in cultured cancer cells.
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We previously demonstrated in vitro that FDG uptake into viable cancer cells increases in the presence of hypoxic versus normoxic conditions. Since position-emitter labeled thymidine and amino acids are being used for PET, we evaluated uptake into tumor cells of several tracers (thymidine,
Effects of maternal hypoxia on incorporation of 3-H-thymidine into DNA of neural tube matrix cells in the mouse embryo (an autoradiographic study).
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The effect of maternal hypoxia on DNA synthesis of neural tube matrix cells has been studied in the ten-day old mouse embryo. The experiments were carried out by means of the autoradiographic technique. The relative uptake of 3-H-thymidine into nuclear DNA was determined by means of the silver grain
No relationship between thymidine phosphorylase (TP, PD-ECGF) expression and hypoxia in carcinoma of the cervix.
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The expression of hypoxia-regulated genes promotes an aggressive tumour phenotype and is associated with an adverse cancer treatment outcome. Thymidine phosphorylase (TP) levels increase under hypoxia, but the protein has not been studied in association with hypoxia in human tumours. An
[Hypoxia responsive element regulated herpes simplex virus-thymidine kinase system enhances killing effect of gancyclovir on Ewing's sarcoma cell line under hypoxic condition].
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OBJECTIVE
To find out a possible approach to improve the effectiveness of radiotherapy and chemotherapy for Ewing's sarcoma by constructing a eukaryotic expression vector expressing herpes simplex virus-thymidine kinase (HSV-TK) regulated by hypoxia responsive element (HRE) under hypoxia and to
Adenovirus-mediated hypoxia-targeted gene therapy using HSV thymidine kinase and bacterial nitroreductase prodrug-activating genes in vitro and in vivo.
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Hypoxia is an important factor in tumor growth. It is associated with resistance to conventional anticancer treatments. Gene therapy targeting hypoxic tumor cells therefore has the potential to enhance the efficacy of treatment of solid tumors. Transfection of a panel of tumor cell lines with
Prevention of hypoxia-induced apoptosis by the angiogenic factor thymidine phosphorylase.
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The angiogenic factor platelet-derived endothelial cell growth factor/thymidine phosphorylase (PD-ECGF/TP) is expressed at higher levels in a wide variety of solid tumors compared to adjacent normal tissues. Patients with PD-ECGF/TP-positive colon and esophageal tumors have a poorer prognosis than
Relation of hypoxia-inducible factor-2 alpha (HIF-2 alpha) expression in tumor-infiltrative macrophages to tumor angiogenesis and the oxidative thymidine phosphorylase pathway in Human breast cancer.
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Tumor-associated macrophages (TAMs) produce angiogenic factors and in breast cancer are associated with high vascular grade and poor survival. TAMs preferentially migrate to hypoxic areas within tumors and strongly express hypoxia-inducible factor (HIF)-2 alpha. This study examined whether HIF-2
Hypoxia and incorporation of 3H-thymidine by cells of the rat pulmonary arteries and alveolar wall.
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In the pulmonary arterial circulation hypoxia produces increase in thickness of the medial muscle coat as well as of the adventitia; in addition muscle appears in smaller arteries than is normal and the number of small arteries that fill on Micropaque-gelatin injection is reduced. To assess the role
Reporter gene imaging: effects of ganciclovir treatment on nucleoside uptake, hypoxia and perfusion in a murine gene therapy tumour model that expresses herpes simplex type-1 thymidine kinase.
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Perfusion, hypoxia and nucleoside uptake during ganciclovir therapy were determined in a murine HSV-1 TK-expressing tumour model (KBALB-STK). HSV-1 TK mRNA transcription in this cell line was confirmed by RT-PCR. BALB/c mice bearing KBALB-STK tumours accumulated
Simultaneous positron emission tomography (PET) assessment of metabolism with ¹⁸F-fluoro-2-deoxy-d-glucose (FDG), proliferation with ¹⁸F-fluoro-thymidine (FLT), and hypoxia with ¹⁸fluoro-misonidazole (F-miso) before and during radiotherapy in patients with non-small-cell lung cancer (NSCLC): a pilot study.
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OBJECTIVE
To investigate the changes in tumour proliferation (using FLT), metabolism (using FDG), and hypoxia (using F-miso) during curative (chemo-) radiotherapy (RT) in patients with non-small-cell lung cancer (NSCLC).
METHODS
Thirty PET scans were performed in five patients (4 males, 1 female)
[3H-thymidine incorporation into the DNA of the radiosensitive organs of rats irradiated in high-altitude conditions and after adaptation to hypoxia in a pressure chamber].
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[Experimental study of brain development in the perinatal period--effects of anoxia and dexamethasone on thymidine kinase activity and DNA synthesis].
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[Effect of ionizing radiation, sulfhydryl compounds and hypoxia on the phosphorylation of thymidine in the thymus gland and spleen of the rat].
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