calcium phosphate/sarcoma

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Calcium phosphate transfection and cell-specific expression of heterologous genes in primary fetal rat hepatocytes.

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In order to study transcriptional regulation of hepatic genes during development, a method for transfer of fusion genes to primary cultures of fetal hepatocytes was required. The aim of this study was to assess currently available transfection methods and optimize the best method for use with

Novel chemoembolization using calcium-phosphate ceramic microsphere incorporating TNP-470, an anti-angiogenic agent.

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The purpose of the present study was to develop a new method of chemoembolization to improve the therapeutic effectiveness and safety profile of cancer treatment. A chemoembolization approach was designed for human solid tumors using resorbable calcium-phosphate ceramic microspheres loaded with an

Doxorubicin-loaded calcium phosphate cement in the management of bone and soft tissue tumors.

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Several materials have been used as drug delivery systems to maintain a high concentration of anticancer drugs at localized sites. The feasibility of using doxorubicin-loaded calcium phosphate cement (CPC) as a new material, which can release the drug as well as fill a postoperative bony defect, was

[Integration of modern technologies in therapy of sarcomas of the pelvis. Computer-assisted hemipelvectomy and implantation of a "custom-made" Bonit gentamycin coated partial pelvic prosthesis].

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The resection of primary malignancies in the pelvis is technically demanding as organs and structures are to be preserved and reconstruction of the defect as well as the postoperative function and rehabilitation are dependent on an optimal prosthesis. We present two patients with a sarcoma of the

Stable expression of a selectable myeloproliferative sarcoma virus in murine T lymphocyte and monocyte cell lines.

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We have investigated whether a retroviral vector based on the myeloproliferative sarcoma virus (MPSV) can be expressed in murine T cells and macrophages. This vector (neoR MPSV) carries the dominant selection marker for neomycin resistance (neoR) and the mos oncogene. The murine T cell line BW5147

Helper-independent transformation by unintegrated Harvey sarcoma virus DNA.

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We have studied the unintegrated infectious DNA of Harvey sarcoma virus (Ha-SV) and Moloney leukemia virus (Mo-MuLV). The source of infectious viral DNA was the Hirt supernatant fraction from cells acutely infected with Ha-SV and Mo-MuLV. To obtain a direct quantitative assay for infectious viral

Gene expression from both intronless and intron-containing Rous sarcoma virus clones is specifically inhibited by anti-sense RNA.

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To distinguish the inhibitory effect of anti-sense RNA on translation from the effect on splicing, a plasmid (pLC32) was constructed from a cDNA clone of the Rous sarcoma virus (RSV) envelope gene (env) mRNA. Transcription of this plasmid results in the synthesis of RNA identical to the RSV env gene

The Rous sarcoma virus long terminal repeat is a strong promoter when introduced into a variety of eukaryotic cells by DNA-mediated transfection.

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We characterized the transcriptional activity of the long terminal repeat (LTR) of Rous sarcoma virus by constructing a recombinant plasmid, pRSVcat, in which bacterial chloramphenicol acetyltransferase (CAT; acetyl-CoA:chloramphenicol 3-O-acetyltransferase, EC 2.3.1.28) coding sequences are placed

Transforming activity of human nasopharyngeal carcinoma DNA.

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NIH 3T3 cells were transfected with the DNAs from biopsy specimens of human nasopharyngeal carcinoma (NPC, EBV DNA positive) using calcium phosphate precipitation method. The malignant, transformed foci of NIH 3T3 cells have been observed and cloned. The hybridization of transfectant DNA digested by

Transfection of human endothelial cells.

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OBJECTIVE The introduction of recombinant genes into endothelial cells provides a method to study specific gene products and their effect on cell function. In addition, endothelial cells can be used for implantation into vessels or prosthetic vascular grafts. Because transfection efficiencies in

Transfer of genes into hematopoietic cells using recombinant DNA viruses.

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The ability of recombinant DNA viruses to transfer genes into hematopoietic cells has been explored. A recombinant simian virus 40 (SV40) in which the early region had been replaced with the chloramphenicol acetyltransferase (CAT) gene driven by the promoter from Rous sarcoma virus (RSV), was

Regulation of transfected glycoprotein hormone alpha-gene expression in primary pituitary cell cultures.

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Studies of gene regulation are greatly facilitated by the ability to transfect DNA into cultured cells. We examined a variety of transfection techniques to optimize transient expression of the human glycoprotein hormone alpha-gene in primary pituitary cells and subsequently investigated the

Antiestrogens stimulate expression of transiently transfected and endogenous genes in rat pituitary tumor cell lines.

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Tamoxifen, nafoxidine, and clomiphene (1 x 10(-5) M) cause 5- to 15-fold increases in transient expression of plasmids transfected into rat somatomammotrophic pituitary tumor cell lines. To be effective, the antiestrogen must be present during the calcium phosphate transfection though it does not

Surface Modification of Porous Titanium Granules for Improving Bioactivity.

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OBJECTIVE The highly porous titanium granules are currently being used as bone substitute material and for bone tissue augmentation. However, they suffer from weak bone bonding ability. The aim of this study was to create a nanostructured surface oxide layer on irregularly shaped titanium granules

The introduction of biologically active foreign genes into human respiratory epithelial cells using electroporation.

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A simple method for introducing genes into respiratory epithelial cells would assist molecular studies of a variety of pulmonary disorders. Several different techniques for introducing foreign DNA into cells have been described but have either not been useful for respiratory epithelial cells or are

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