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Sarcoma 180 inhibition by combinations of 6-thioguanine and uracil mustard.
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Combinations of 6-thioguanine and uracil mustard produced greater inhibition of the growth of sarcoma 180 than that equivalent to the sum of the inhibitory effects caused by the optimum levels of the individual drugs. This potentiation was accomplished without marked weight loss by the host. Some
Latency-associated nuclear antigen of Kaposi's sarcoma-associated herpesvirus recruits uracil DNA glycosylase 2 at the terminal repeats and is important for latent persistence of the virus.
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Latency-associated nuclear antigen (LANA) of KSHV is expressed in all forms of Kaposi's sarcoma-associated herpesvirus (KSHV)-mediated tumors and is important for TR-mediated replication and persistence of the virus. LANA does not exhibit any enzymatic activity by itself but is critical for
Evaluation of uracil mustard in children with Hodgkin's disease, lymphosarcoma, and soft tissue sarcoma.
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Antitumor activity of 5-bis(2-chloroethyl) amino uracil against sarcoma 180 and Ehrlich carcinoma.
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Innate immune defense defines susceptibility of sarcoma cells to measles vaccine virus-based oncolysis.
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The oncolytic potential of measles vaccine virus (MeV) has been demonstrated in several tumor entities. Here, we investigated the susceptibility of eight sarcoma cell lines to MeV-mediated oncolysis and found five to be susceptible, whereas three proved to be resistant. In the MeV-resistant cell
A structurally conserved motif in γ-herpesvirus uracil-DNA glycosylases elicits duplex nucleotide-flipping.
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Efficient γ-herpesvirus lytic phase replication requires a virally encoded UNG-type uracil-DNA glycosylase as a structural element of the viral replisome. Uniquely, γ-herpesvirus UNGs carry a seven or eight residue insertion of variable sequence in the otherwise highly conserved minor-groove DNA
Inhibition of RNA-dependent DNA polymerase reaction by 6-(p-hydroxyphenylazo)-uracil: A result of drug induced dithiothreitol oxidation.
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6-(P-hydroxyphenylazo)-uracil (HPUra) reduced by dithiothreitol inhibited AMV or RLV virion associated exogenous RNA-dependent DNA polymerase reactions. However, the inhibition was variable from experiment to experiment and was not consistent with the base specificity of HPUra seen for inhibition of
The primary sequence of rhesus monkey rhadinovirus isolate 26-95: sequence similarities to Kaposi's sarcoma-associated herpesvirus and rhesus monkey rhadinovirus isolate 17577.
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The primary sequence of the long unique region L-DNA (L for low GC) of rhesus monkey rhadinovirus (RRV) isolate 26-95 was determined. The L-DNA consists of 130,733 bp that contain 84 open reading frames (ORFs). The overall organization of the RRV26-95 genome was found to be very similar to that of
Positive and negative regulation in the promoter of the ORF46 gene of Kaposi's sarcoma-associated herpesvirus.
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The ORF46 gene of Kaposi's sarcoma-associated herpesvirus (KSHV) encodes uracil DNA glycosylase, an enzyme involved in DNA repair. In this study, we show that the transcriptional start site of the ORF46 gene is located at nucleotide 69,425 of the viral genome and ORF50 protein, a latent-lytic switch
Hyperthermia enhances the inhibition of tumor growth by 1-(2-tetrahydrofuryl)-5-fluorouracil/uracil (1:4) in tumors in mice and humans.
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The cytotoxicity of several antitumor drugs is enhanced by hyperthermia (HT). Using mouse Sarcoma-180 (S-180) tumors, the authors examined the effects of 5-fluorouracil (5-FU) and a combined oral preparation of 1-(2-tetrahydrofuryl)-5-fluorouracil (FT) and uracil in a molar ratio of 1:4 (UFT), in
Enhancement of antitumor effect of tegafur/uracil (UFT) plus leucovorin by combined treatment with protein-bound polysaccharide, PSK, in mouse models.
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We evaluated the antitumor effect of combined therapy with tegafur/uracil (UFT) plus leucovorin (LV) (UFT/LV) and protein-bound polysaccharide, PSK, in three mouse models of transplantable tumors. UFT/LV showed antitumor effect against Meth A sarcoma, and the antitumor effect was enhanced when PSK
Effect of coadministration of uracil or cytosine on the anti-tumor activity of clinical doses of 1-(2-tetrahydrofuryl)-5-fluorouracil and level of 5-fluorouracil in rodents.
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Concentration of 5-fluorouracil (5-FU) in the tumor, blood, and various organs of AH130-bearing rats after administration of clinical doses of 1-(2-tetrahydrofuryl)-5-fluorouracil (FT-207) and uracil was examined. The concentration of 5-FU in blood was less than 0.02 microgram/ml with all
[Synchronization of tumor cells with 5-fluorouracil plus uracil and with vinblastine and irradiation of the synchronized cultures. A contribution to combined radio-chemotherapy].
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In this article, some arguments are put forward which support the conception of a combined radio-chemotherapy acting by a reversible inhibition of tumor cells with cytostatic drugs in a not cytocidal dose and the following selective killing by irradiation of the cells blocked in a radiosensitive
Inhibitor properties of some 5-substituted uracil acyclonucleosides, and 2,2'-anhydrouridines versus uridine phosphorylase from E. coli and mammalian sources.
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Two series of 5-substituted uracil N(1)-acyclonucleosides, each with a different acyclic chain, were examined as inhibitors of uridine phosphorylase from rat intestinal mucosa, and several against the enzyme from Ehrlich ascites cells. In addition, several 5-substituted analogues of
Incorporation characteristics of uracil, uridine, and orotic acid into ribonucleic acid of neoplastic cells.
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Incorporation of uracil and uridine into ribonucleic acid (RNA) was compared among the ascitic and solid forms of Ehrlich mouse tumor, Morris hepatoma, Rhodamine sarcoma, gastric cancer and ulcer from human patients, and several normal rat tissues. Of these cells tested, the cells of Ehrlich ascites
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