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Strana 1 od 477 výsledky
Induction of Kaposi Sarcoma Associated Herpesvirus-encoded Thymidine Kinase (ORF21) by X-Box Binding Protein-1.
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Kaposi's sarcoma-associated herpesvirus (KSHV) is the causative agent for Kaposi sarcoma (KS), primary effusion lymphoma (PEL), and multicentric Castleman disease (MCD). Like other herpesviruses, it has latent and lytic repertoires. However, there is evidence that some lytic genes can be directly
Measurement of thymidine replacement in patients with high grade gliomas, head and neck tumors, and high grade sarcomas after continuous intravenous infusions of 5-iododeoxyuridine.
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Based upon the radiation sensitization properties of the halogenated pyrimidines, 5-iododeoxyuridine (IdUrd) and 5-bromodeoxyuridine, long term i.v. infusions of halogenated pyrimidines in conjunction with fractionated radiation therapy have been evaluated in the treatment of a variety of human
Thymidine and hypoxanthine requirements for the proliferation of normal and Rous sarcoma virus-infected chicken fibroblasts in the presence of methotrexate.
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Cultured normal and Rous sarcoma virus-infected chicken fibroblasts do not differ in the concentrations of thymidine or of hypoxanthine that they require to proliferate in the presence of a methotrexate block. For maximal proliferation, thymidine is required at 10(-6) M, while hypoxanthine is
Dipyridamole inhibits reversion by thymidine of methotrexate effect and increases drug uptake in Sarcoma 180 cells.
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The combined effect of methotrexate (MTX) with dipyridamole, an inhibitor of nucleoside transport, was studied in ascitic Sarcoma 180 cells. It was determined that 10 microM MTX inhibits by greater than 90% deoxy[3H]uridine incorporation into DNA and that this MTX concentration inhibits DNA
3H-thymidine autoradiography of CSF cells in primary reticulum cell sarcoma of the brain.
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CSF cells in a case of primary reticulum cell sarcoma of the brain with diffuse subarachnoid spreading were examined by 3H-thymidine autoradiography. Immediately after lumbar puncture, the CSF withdrawn was incubated at 37 degrees C for 1 hr with an admixture of 3H-thymidine at a rate of 1 muCi/ml
Specific increase in thymidine transport at a permissive temperature in the rat kidney cells infected with srcts-Rous sarcoma virus.
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Thymidine transport was found to be increased two-fold at a permissive temperature in the cells of a normal rat kidney (NRK) line which was infected with a temperature-sensitive Rous sarcoma virus. This increase in thymidine transport was independent of cell density and coincided with the changes in
Thymidine phosphorylase expression in Kaposi sarcoma.
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OBJECTIVE
To examine the immunohistochemical distribution of thymidine phosphorylase (TP) in all clinicopathological subtypes of Kaposi sarcoma.
METHODS
Thirty two biopsy specimens of Kaposi sarcoma (29 patients) were studied. Six of these patients represented classic, six endemic, eight HIV
3H-thymidine incorporation method versus colony forming assay in the determination of anchorage-independent cell growth of rat sarcoma (XC) and Morris hepatoma 7777 (MH) cells.
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The modification of 3H-thymidine incorporation method of Tanigawa was used to the estimation of anchorage-independent growth of virally and chemically transformed rat cells. The relationship between colony forming assay and 3H-TdR incorporation test was determined, depends on the composition of
Determination of growth kinetics in a renal sarcoma of the rat by double labeling with 14C- and 3H-thymidine.
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An in vitro double-labeling technique for determination of kinetic growth parameters was tested; 13 renal sarcomas of rats were incubated after excision under standardized conditions with 14C- and 3H-thymidine successively. Another ten tumors were evaluated after in vivo double injection of 14C and
[Thymidylate synthase, thymidine phosphorylase and dihydropyrimidine dehydrogenase expression in soft-tissue sarcoma versus capecitabine potential].
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Expression of thymidylate synthase (TS), thymidine phosphorylase (TP) and dihydropyrimidine dehydrogenase (DPD) can predict for clinical outcome of fluoropyrimidine-based therapy and there is every likelihood that relevant tumors will respond. High TP expression was observed in 35 (42%) patients
Detection and grading of soft tissue sarcomas of the extremities with (18)F-3'-fluoro-3'-deoxy-L-thymidine.
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OBJECTIVE
The aim of the study was to investigate the feasibility of (18)F-3'-fluoro-3'-deoxy-L-thymidine positron emission tomography (FLT-PET) for the detection and grading of soft tissue sarcoma (STS).
METHODS
Nineteen patients with 20 STSs of the extremities were scanned, using attenuation
Expression of thymidine phosphorylase in uterine sarcoma and uterine leiomyoma: association with microvessel density and Doppler blood flow analysis.
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The aim of this study was to determine whether the expression of thymidine phosphorylase (TP) by uterine sarcoma and leiomyoma cells is associated with the density of microvessels within the tumor, and with Doppler ultrasound-derived peak systolic velocity (PSV) of blood flow. Sections of tissue
Comparison of long-term survival of cytomegalovirus promotre versus Rous Sarcoma virus promoter-driven thymidine kinase gene therapy in nude mice bearing human ovarian cancer.
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The cytomegalovirus (CMV) promoter is considered one of the strongest positive regulators leading to expression of higher levels of the thymidine kinase (TK) enzyme than the Rous Sarcoma virus (RSV) promoter in vitro and in vivo. Cell killing efficacy of adenovirus-mediated CMV promoter-driven
Construction and isolation of a transmissible retrovirus containing the src gene of Harvey murine sarcoma virus and the thymidine kinase gene of herpes simplex virus type 1.
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We constructed lambda recombinants containing the Harvey murine sarcoma virus genome and the thymidine kinase (tk) gene of herpes simplex virus type 1 linked to each other. The tk gene was located in a position downstream from both the long terminal repeat and the src gene of Harvey murine sarcoma
3'-deoxy-3'-[18F]fluorothymidine positron emission tomography for response assessment in soft tissue sarcoma: a pilot study to correlate imaging findings with tissue thymidine kinase 1 and Ki-67 activity and histopathologic response.
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BACKGROUND
This study sought to determine whether [(18)F]fluorothymidine (FLT) positron emission tomography (PET)/computed tomography (CT) imaging allows assessment of tumor viability and proliferation in patients with soft tissue sarcomas who are treated with neoadjuvant therapy.
METHODS
Twenty
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