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nicotiana thyrsiflora/cancro
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Plant-derived human papillomavirus 16 E7 oncoprotein induces immune response and specific tumor protection.
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Vaccine strategies for treatment of human papillomavirus-induced cervical cancer are based on either the recombinant E7 fusion oncoprotein or E7 CTL peptides. The therapeutic potential of the E7-based vaccine depends on the use of different adjuvants. In this study, we describe for the first time
Proteins encoded by Agrobacterium tumefaciens Ti plasmid DNA (T-DNA) in crown gall tumors.
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In order to detect proteins that may be produced in crown gall tumors as a result of expression of incorporated Agrobacterium tumefaciens Ti plasmid DNA (T-DNA), we have isolated mRNA complementary to T-DNA and translated this in a protein-synthesizing system derived from wheat germ. mRNA prepared
Tumor formation in Nicotiana: Auxin levels and auxin inhibitors in normal and tumor-prone genotypes.
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Auxin and auxin-inhibitors from acidic ether extracts of normal stem tissue of Nicotiana longiflora, N. debneyi-tabacum, their tumor producing F 1 hybrid and non-tumor and tumor-prone segregants were separated by thin-layer chromatography and measured by an Avena curvature test. A significantly
Auxin: its role in genetic tumor induction.
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Seedlings of the tumor-prone amphiploid Nicotiana suaveolens X N. langsdorffii were grown on nutrient medium supplemented with indoleacetic acid (IAA) and scored at regular intervals for the incidence of tumor formation. IAA at 2 x 10(-5)m caused a significant reduction in the rate of tumor
Production of a tumour-targeting antibody with a human-compatible glycosylation profile in N. benthamiana hairy root cultures.
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Hairy root (HR) cultures derived from Agrobacterium rhizogenes transformation of plant tissues are an advantageous biotechnological manufacturing platform due to the accumulation of recombinant proteins in an otherwise largely protein free culture medium. In this context, HRs descending from
Acid phosphatase activity of normal and tumor tissue of tobacco grown in vitro and in vivo.
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Tissue cultures of Nicotiana labacum consisting of green, albino and habituated (normal origin) and teratoma (tomorous origin) were grown under asceptic conditions for 6 to 8 weeks and their extracts were analyzed for phosphatase activity. Comparative enzyme analyses were also made on crude stem
The relationship of indole-3-acetic acid content and growth of crown-gall tumor tissues of tobacco in culture.
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We have measured the content of the auxin, indole-3-acetic acid (IAA), in cloned, crown-gall teratoma line of Nicotiana tabacum L. cv. "Turkish" by a highly specific and sensitive radioimmunoassay. This tissue line, which does not require auxin for continuous growth in culture, exhibits two phases
Plant-derived anti-Lewis Y mAb exhibits biological activities for efficient immunotherapy against human cancer cells.
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Although current demands for therapeutic mAbs are growing quickly, production methods to date, including in vitro mammalian tissue culture and transgenic animals, provide only limited quantities at high cost. Several tumor-associated antigens in tumor cells have been identified as targets for
Tobacco Translationally Controlled Tumor Protein Interacts with Ethylene Receptor Tobacco Histidine Kinase1 and Enhances Plant Growth through Promotion of Cell Proliferation.
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Ethylene is an important phytohormone in the regulation of plant growth, development, and stress response throughout the lifecycle. Previously, we discovered that a subfamily II ethylene receptor tobacco (Nicotiana tabacum) Histidine Kinase1 (NTHK1) promotes seedling growth. Here, we identified an
Translationally controlled tumour protein (TCTP) from tomato and Nicotiana benthamiana is necessary for successful infection by a potyvirus.
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Translationally controlled tumour protein (TCTP) is a ubiquitously distributed protein in eukaryotes, involved in the regulation of several processes, including cell cycle progression, cell growth, stress protection, apoptosis and maintenance of genomic integrity. Its expression is induced during
Mass-spectrometric quantitation of cytokinins in tobacco crown-gall tumours induced by mutated octopine Ti plasmids of Agrobacterium tumefaciens.
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The levels of the major cytokinins, zeatin, zeatin riboside, zeatin riboside-5'-monophosphate and zeatin-7-glucoside were measured in tobacco (Nicotiana tabacum L.) crown-gall tissues carrying insertion and deletion mutations in the T-DNA. Measurements were made by combined gas chromatography-mass
Studies on the structure of cointegrates between octopine and nopaline Ti-plasmids and their tumour-inducing properties.
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Stable cointegrates between incRh-1 octopine (Ach5) and nopaline (C58) Ti-plasmids, present in ten independently isolated Agrobacterium tumefaciens strains, showed identical restriction endonuclease patterns. Each cointegration event had taken place in the common sequence between the T-regions of
Bradyrhizobium betae sp. nov., isolated from roots of Beta vulgaris affected by tumour-like deformations.
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Some varieties of sugar beet, Beta vulgaris, cultivated in northern Spain have large deformations that resemble the tumours produced by Agrobacterium species. In an attempt to isolate the agent responsible for these deformations, several endophytic slow-growing bacterial strains were isolated, the
A study of tobacco carcinogenesis. LI. Relative potencies of tobacco-specific N-nitrosamines as inducers of lung tumours in A/J mice.
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Tobacco-specific N-nitrosamines (TSNA) are formed from nicotine and the minor Nicotiana tabacum alkaloids during tobacco processing and tobacco smoking. The TSNA are the most abundant strong carcinogens in smokeless tobacco and in smoke. In this comparative study six TSNA and two major volatile
Ethylene production by shoot-forming and unorganized crown-gall tumor tissues of Nicotiana and Lycopersicon cultured in vitro.
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We have studied ethylene biosynthesis in cloned crown-gall cell lines of Nicotiana tabacum L., N. glutinosa L., and Lycopersicon esculentum (L.) Mill. transformed by the A6 strain of Agrobacterium tumefaciens (Smith and Townsend) Conn. or a tms (shooty) mutant strain, A66. Both the synthesis of the
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