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Choroid plexus epithelial expression of MDR1 P glycoprotein and multidrug resistance-associated protein contribute to the blood-cerebrospinal-fluid drug-permeability barrier.
The blood-brain barrier and a blood-cerebrospinal-fluid (CSF) barrier function together to isolate the brain from circulating drugs, toxins, and xenobiotics. The blood-CSF drug-permeability barrierExpand
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Triapine (3-aminopyridine-2-carboxaldehyde- thiosemicarbazone): A potent inhibitor of ribonucleotide reductase activity with broad spectrum antitumor activity.
Previous studies from our laboratories have shown that (a) Triapine() is a potent inhibitor of ribonucleotide reductase activity and (b) hydroxyurea-resistant L1210 leukemia cells are fully sensitiveExpand
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Disruption of the murine MRP (multidrug resistance protein) gene leads to increased sensitivity to etoposide (VP-16) and increased levels of glutathione.
The mrp (multidrug resistance protein) gene has been associated with the multidrug resistance of cancer cells in vitro and in vivo. To gain information on its physiological role, embryonic stem cellsExpand
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Teratogenic assessment of four solvents using the frog embryo teratogenesis assay—xenopus (FETAX)
The Frog Embryo Teratogenesis Assay—Xenopus (FETAX) was used to assess the teratogenic potential of four solvents. Embryos of the South African clawed frog, Xenopus laevis, were exposed for 96 h toExpand
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Phase III interlaboratory study of FETAX part 3. FETAX validation using 12 compounds with and without an exogenous metabolic activation system
FETAX (Frog Embryo Teratogenesis Assay—Xenopus) is a 96‐h whole‐embryo developmental toxicity screening assay that can be used in ecotoxicology and in detecting mammalian developmental toxicants whenExpand
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Nucleolar localization of nucleophosmin/B23 requires GTP.
Incubation of HeLa cells with the IMP dehydrogenase inhibitors: ribavirin (100 microM, 4 h), tiazofurin (100 microM, 4 h), selenazofurin (100 microM, 4 h), or mycophenolic acid (10 microM, 4 h)Expand
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Triapine (3-aminopyridine-2-carboxaldehyde thiosemicarbazone; 3-AP): an inhibitor of ribonucleotide reductase with antineoplastic activity.
The enzyme RR catalyzes the conversion of ribonucleoside diphosphates to their deoxyribonucleotide counterparts. RR is critical for the generation of the cytosine, adenine, and guanineExpand
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1,2-Bis(methylsulfonyl)-1-(2-chloroethyl)-2-(methylamino)carbonylhydrazine (101M): a novel sulfonylhydrazine prodrug with broad-spectrum antineoplastic activity.
Our laboratory has synthesized and evaluated the anticancer activity of a number of sulfonylhydrazine DNA modifying agents. As a class, these compounds possess broad spectrum antitumor activity,Expand
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Inhibition of growth and modulation of gene expression in human lung carcinoma in athymic mice by site-selective 8-Cl-cyclic adenosine monophosphate.
Site-selective cyclic AMP (cAMP) analogues inhibit growth and induce changes in morphology in a spectrum of human cancer cell lines (D. Katsaros et al., FEBS Lett., 223:97, 1987). The cellular eventsExpand
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New insights into the biology and pharmacology of the multidrug resistance protein (MRP) from gene knockout models.
Growing interest in the MRP (multidrug resistance protein) gene stems from its importance in multidrug resistance to chemotherapy, its possible use in gene therapy, and its relationship with theExpand
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