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Página 1 a partir de 24 resultados
Differential extraction of tumor-specific transplantation antigen and embryonic antigen from simian virus 40- and adenovirus 7-induced sarcoma cells of hamsters with 1-butanol and 3 M potassium chloride.
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Simian virus 40 (SV40)-induced sarcomas and adenovirus 7-induced sarcomas (Adv-7) exhibit both specific tumor-specific transplantation antigens (TSTA) and cross-protective embryonic antigens at the cell surface in the LAK:LVG(SYR) strain of Syrian golden hamsters. Specific SV40 TSTA could be
Immunobiological properties of 1-butanol-extracted cell surface antigens.
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Extracts of viable 3-methylcholanthrene-induced murine sarcoma cells (MCA-F and MCA-2A) prepared using single-phase (2.5%) 1-butanol significantly retarded the outgrowth of the homotypic, but not the heterotypic, tumor of syngeneic C3H/HeJ mice. Butanol extracts specifically evoked a delayed
Selective extraction by 1-butanol of surface glycoprotein antigens from human melanoma cells.
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The butanol extraction method has previously been used to achieve selective release of tumor-specific transplantation antigens from mouse sarcoma cells. In this study we investigated the feasibility of this method for extracting four surface glycoprotein antigens (87K, 95-150K, HLA-DR, and
Immunotherapeutic effects of tumor-specific transplantation antigens released by 1-butanol.
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Active immunotherapy with materials extracted from a murine methylcholanthrene-induced sarcoma using single phase solutions of 2.5% 1-butanol evoked host resistance against supralethal burdens of neoplastic cells deposited subcutaneously or delivered hematogenously. After curative resection of
Human tumor-associated antigens detected by serological techniques: analysis of autologous humoral immune responses to primary and metastatic human sarcomas by an enzyme-linked immunoabsorbent solid-phase assay (ELISA).
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An enzyme-linked immunoabsorbent solid-phase assay was developed for measuring humoral immune responses to human sarcoma-associated antigens, and binding of autologous sera to 1-butanol extracts of fresh sarcomas was determined. Binding of autologous sarcoma patients' sera was reproducible and
Characteristics of a cell surface antigen defined by an anti-human osteogenic sarcoma monoclonal antibody.
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The expression of a cell surface antigen defined by an anti-human osteogenic sarcoma monoclonal antibody was analysed by flow cytofluorometry using fluorescein-labelled antibody. Quantitative absorption tests established that the antigen was associated with plasma membranes, whereas cytosol,
Budding of Rous sarcoma virus and vesicular stomatitis virus from localized lipid regions in the plasma membrane of chicken embryo fibroblasts.
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The origin of the envelope lipids acquired by Rous sarcoma virus (RSV) and vesicular stomatitis virus (VSV) during budding from the plasma membrane of chicken embryo fibroblasts was examined. Several differences were observed between the lipid composition of RSV and the plasma membrane. When the
Comparative Antitumor Activity of Different Solvent Fractions from an Auricularia auricula-judae Ethanol Extract in P388D1 and Sarcoma 180 Cells.
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The objective of this study was to evaluate and compare the antitumor activity of different solvent fractions (ethanol, dichloromethane, ethyl acetate, butanol and water) of the Auricularia auricula-judae 70% ethanol extract on the P388D1 macrophage and sarcoma 180 cells. A dose-dependent antitumor
Inhibition of platelet-derived growth factor-induced cell growth signaling by a short interfering RNA for EWS-Fli1 via down-regulation of phospholipase D2 in Ewing sarcoma cells.
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EWS-Fli1, a fusion gene resulting from a chromosomal translocation t(11;22, q24;q12) and found in Ewing sarcoma and primitive neuroectodermal tumors, encodes a transcriptional activator and promotes cellular transformation. However, the precise biological functions of its products remain unknown. To
Ewing's sarcoma fusion protein, EWS/Fli-1 and Fli-1 protein induce PLD2 but not PLD1 gene expression by binding to an ETS domain of 5' promoter.
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It was reported that short interfering RNA (siRNA) of EWS/Fli-1 downregulated phospholipase D (PLD)2 in Ewing's sarcoma (EWS) cell line, suggesting that PLD2 is the target of aberrant transcription factor, EWS/Fli-1. Here, we further investigated the regulation of PLD2 gene expression by EWS/Fli-1
Extraction of a murine tumor-specific transplantation antigen with 1-butanol. I. Partial purification by isoelectric focusing.
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Treatment of whole viable MCA-F murine sarcoma cells from syngeneic female C3H/HeJ mice with a single-phase solution of 2.5% (vol/vol) 1-butanol yielded a crude membrane protein extract without loss of cell viability. 1-Butanol-extracted cells were capable of in vitro proliferation. Variations in
Immunomodulatory activity of butanol extract from Solanum lyratum in tumor-bearing mice.
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Solanum lyratum Thunb (Solanaceae) has been widely used for cancer as a folk remedy in Chinese traditional medicine. In this study, the main active fraction n-butanol extract from S. lyratum (BESL) was evaluated for the therapeutic efficacies on mice transplantable tumor and immunomodulatory
Mutagenicity of iso-butyl nitrite vapor in the Ames test and some relevant chemical properties, including the reaction of iso-butyl nitrite with phosphate.
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We examined the mutagenicity of iso-butyl nitrite (IBN) vapor and aqueous IBN solution in the Ames test to help evaluate the hazard of sniffing this vapor, a habit which might play a role in the induction of Kaposi's sarcoma associated with acquired immune deficiency syndrome. Chemical analysis
The effect of purification on the immunogenicity of tumor-specific transplantation antigens.
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Immunization with the tumor-specific transplantation antigens (TSTA) of experimental, chemically induced sarcomas engenders specific host resistance to challenge with viable, homotypic neoplastic cells. The strength of tumor resistance depends upon the physical state of the TSTA used for
Malignant melanoma: cross-reacting (common) tumor rejection antigens.
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The expression of tumor-associated transplantation antigens (TATA) by 3 different murine melanomas was examined. A comparison was made between different modes of inducing tumor-rejection activity, including immunization with irradiated cells from tissue culture lines, with irradiated cells from
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