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7 resultats
Reversal by cefoperazone of resistance to etoposide, doxorubicin, and vinblastine in multidrug resistant human sarcoma cells.
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The cephalosporins are a family of semisynthetic antibiotics, some of which have structural features associated with substrates for the multidrug transporter, P-glycoprotein. The activity of a series of six cephalosporins in reversing multidrug resistance (MDR) was examined in MDR variants (Dx5
Mitochondrial targeting for photochemotherapy. Can selective tumor cell killing be predicted based on n-octanol/water distribution coefficients?
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The concept of mitochondrial targeting for chemo- and photochemotherapy of neoplastic diseases has its origin in the observation that enhanced mitochondrial transmembrane potential is a common tumor cell phenotype. As a result of this enhanced transmembrane potential, a number of cationic dyes
Effect of partition coefficient on the ability of nitroimidazoles to enhance the cytotoxicity of 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea.
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The ability of three nitroimidazoles [SR-2508, misonidazole (MISO), and benznidazole] with differing octanol-water partition coefficients to enhance the cytotoxicity of the nitrosourea 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea (CCNU) was evaluated in two mouse tumors (the KHT sarcoma and the SCC
Connexin43 mediates direct intercellular communication in human osteoblastic cell networks.
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We have examined cell coupling and expression of gap junction proteins in monolayer cultures of cells derived from human bone marrow stromal cells (BMC) and trabecular bone osteoblasts (HOB), and in the human osteogenic sarcoma cell line, SaOS-2. Both HOB and BMC cells were functionally coupled,
[Quantitative aspects of the relationship of the antitumor activity and toxicity of diaziridinyl-sym. triazines to their physicochemical properties].
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The experiments on rats have shown that there is a linear dependence of the logarithms of reciprocal molar toxic (LD50) and therapeutic (ED50) for sarcoma 45 doses of 6-oxyalkyl-amino-2,4-bis(I-aziridinyl)-sym-triazines and
Structure/activity relationships for the enhancement by electron-affinic drugs of the anti-tumour effect of CCNU.
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Using a regrowth-delay assay, we investigated structure/activity relationships for the enhancement by electron-affinic agents of the anti-tumour effect of the nitrosourea CCNU against the KHT sarcoma in C3H mice. A series of neutral 2-nitroimidazoles similar in electron affinity but varying in
Nucleic acid related compounds. 57. Synthesis, x-ray crystal structure, lipophilic partition properties, and antiretroviral activities of anomeric 3'-azido-2',3'-dideoxy-2,6-diaminopurine ribosides.
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Trimethylsilyl triflate-catalyzed transfer glycosylation of 2,6-diamino-9-(3-azido-2,3-dideoxy-alpha- and -beta-D-erythro-pentofuranosyl)purines (3 and 4) in low yields. Selective 2'-O-tosylation of 2,6-diamino-9-(beta-D-ribofuranosyl)purine (2,6-diaminopurine riboside, DAPR, 5) followed by our
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