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tryptophan/sarcome
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Purification of tryptophan transfer RNA from chick cells and its identity with "spot 1" RNA of Rous sarcoma virus.
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Tryptophan transfer RNA from chick cells chromatographs differently in the reversed-phase column chromatographic system 5 depending upon whether it is aminoacylated or not. This property was utilized to prepare pure tryptophan tRNA. Oligonucleotide fingerprints of tryptophan tRNA purified in this
The Kynurenine Pathway of Tryptophan Catabolism and AIDS-Associated Kaposi Sarcoma in Africa.
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BACKGROUND
Other than Kaposi sarcoma (KS)-associated herpesvirus and CD4 T-cell lymphopenia, the mechanisms responsible for KS in the context of HIV are poorly understood. One recently explored pathway of HIV pathogenesis involves induction of the enzyme indoleamine 2,3-dioxygenase-1 (IDO), which
[Excretion of 5-hydroxyindoleacetic acid in the urine of sarcoma-45 bearing rats after administration of serotonin, 5-hydroxytryptophan and tryptophan].
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Effect of alanine, glycine, phenylalanine, and tryptophan mustards on Ehrlich ascites carcinoma and Ridgway osteogenic sarcoma.
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Interaction of tryptophan transfer RNA with Rous sarcoma virus 35S RNA.
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The early cancer anorexia paradigm: changes in plasma free tryptophan and feeding indexes.
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Tumor growth is accompanied by an anorexia mediated by humoral factors that appear to influence appetitive mechanisms in the brain. Because tumor resection is followed by resumption of normal food intake, the circulating anorexigenic substance(s) are produced either by the neoplastic tissue or by
Angiogenesis inhibitor IM862 is ineffective against AIDS-Kaposi's sarcoma in a phase III trial, but demonstrates sustained, potent effect of highly active antiretroviral therapy: from the AIDS Malignancy Consortium and IM862 Study Team.
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OBJECTIVE
IM862 is a synthetic dipeptide (L-glutamine L-tryptophan) with in vitro and in vivo antiangiogenic properties. Phase I/II studies showed minimal toxicity and a response rate of 36% in AIDS-Kaposi's sarcoma. We report a 24-week, randomized, double-blinded, placebo-controlled phase III trial
[Effect of DL-tryptophan on blastomogenesis induced by acrylic plastic].
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Plastic plates implanted subcutaneously to rats induced sarcoma in 11 of 27 animals (40.7%) which survived up to the time of the first tumour appearance (12.3 months). No tumours were revealed at the sites of the plastic powder implantation. Following long-term administration of DL-tryptophan
Initiation of DNA synthesis by the avian oncornavirus RNA-directed DNA polymerase: tryptophan tRNA as the major species of primer RNA.
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The major species of primer RNA required for the initiation of DNA synthesis by the Rous sarcoma virus RNA-directed DNA polymerase can be aminoacylated by tryptophan. Furthermore, an intact 3' terminus is required for the primer to function in the initiation of DNA synthesis.
Carcinogenic activity of 3-amino-1-methyl-5H-pyrido [4,3-b]indole (Trp-P-2), a pyrolysis product of tryptophan.
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The carcinogenic activity of 3-amino-1-methyl-5H-pyrido[4,3-b]indole (Trp-P-2), a pyrolysis product of tryptophan, was studied in inbred strain ACI rats. Twenty rats received a diet containing 0.01% Trp-P-2 for 870 days. Nineteen rats survived for more than 400 days after the start of feeding, 1 rat
Comparative study of tumorigenicity in mice administered transplacentally or neonatally with metabolites of tryptophan and its related compounds.
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Intermediate metabolites of tryptophan, 3-hydroxy-L-kynurenine (3-OHKY), 3-hydroxyanthranilic acid (3-OHAA) and anthranilic acid (AA), and an enzyme inhibitor from 3-OHKY to 3-OHAA, isonicotinic acid hydrazide (INH) with or without 3-OHKY at the maximum tolerated dose were injected s.c. to infant
Characterization of the LDL-A module mutants of Tva, the subgroup A Rous sarcoma virus receptor, and the implications in protein folding.
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Tva is the cellular receptor for subgroup A Rous sarcoma virus (RSV-A), and the viral receptor function is solely determined by a 40-residue motif called the LDL-A module of Tva. In this report, an integral approach of molecular, biochemical, and biophysical techniques was used to examine the role
Epitope mapping of monoclonal antibodies to gag protein p19 of avian sarcoma and leukaemia viruses.
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We have characterized a set of 15 monoclonal antibodies to p19gag, one of the internal proteins of avian sarcoma and leukaemia viruses. All the antibodies work in immune precipitations as well as in immunoblotting, though with different efficiencies. We have developed a simple epitope mapping
A mycoplasma high-affinity transport system and the in vitro invasiveness of mouse sarcoma cells.
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FS9 mouse sarcoma cells were previously shown to be highly invasive when confronted with chicken heart fibroblasts using Abercrombie's confronted explant technique. This invasion could be inhibited by addition to the assay of Fab fragments of a monoclonal antibody directed against p37, a protein
Receptor-induced conformational changes in the SU subunit of the avian sarcoma/leukosis virus A envelope protein: implications for fusion activation.
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The avian sarcoma/leukosis virus (ASLV) is activated for fusion by a two-step mechanism. For ASLV subgroup A (ASLV-A), association with its receptor (Tva) at neutral pH converts virions to a form that can bind target membranes and, in some assays, induce the lipid-mixing stage of fusion. Low pH is
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