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phytohormone/neoplasms
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Phytohormones in the formation of crown gall tumors.
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Crown gall tumors were initiated in a variety of plant species by infection with Agrobacterium tumefaciens strain B6 and the concomitant changes in the tissue levels of phytohormones, mainly indole-3-acetic acid (IAA) and cytokinins, were analyzed. A comparison was made of these hormones with those
Strigolactones: a novel class of phytohormones that inhibit the growth and survival of breast cancer cells and breast cancer stem-like enriched mammosphere cells.
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Several naturally occurring phytohormones have shown enormous potential in the prevention and treatment of variety of different type of cancers. Strigolactones (SLs) are a novel class of plant hormones produced in roots and regulate new above ground shoot branching, by inhibiting self-renewal of
Strigolactones-a novel class of phytohormones as anti-cancer agents.
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Chemotherapy shows some promising results in the inhibition of cancer, but resistance to chemotherapy and its severe side effects may occur in due course, resulting in only restricted and narrow benefits. Therefore, there is a pressing need to find alternative chemotherapeutic drugs for combating
The phytohormone auxin induces G1 cell-cycle arrest of human tumor cells.
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The plant hormone auxin is the key regulator of plant growth and development. Auxin regulates transcription of plant genes by targeting degradation of transcriptional repressor proteins Aux/IAA. While there are many reports describing its potential to modulate human cell functions, the majority are
Initiation of spontaneous tumors in radish (Raphanus sativus): Cellular, molecular and physiological events.
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In plant meristems, the balance of cell proliferation and differentiation is maintained by phytohormones, specifically auxin and cytokinin, as well as transcription factors. Changing of the cytokinin/auxin balance in plants may lead to developmental abnormalities, and in particular, to the formation
Clones from a shooty tobacco crown gall tumor II: irregular T-DNA structures and organization, T-DNA methylation and conditional expression of opine genes.
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Transformed clones from a shooty tobacco crown gall tumor, induced byAgrobacterium tumefaciens strain LBA1501, having the auxin locus of the TL-region inactivated by a Tn1831 insertion, were investigated for their T-DNA structure and expression. It has been described previously (28) that in addition
The morphological and physiological properties of the genetic tumours from a Nicotiana interspecific hybrid.
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Many plant tumours have been loosely referred to as genetic tumours when no obvious external cause was identifiable. In this study, the morphology of genetic tumours was detected by scanning electron microscopy (SEM) and the influence of exogenous phytohormones on genetic tumour growth was examined.
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
Clones from a shooty tobacco crown gall tumor I: deletions, rearrangements and amplifications resulting in irregular T-DNA structures and organizations.
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Transformed clones from a shooty tobacco crown gall tumor, induced byAgrobacterium tumefaciens strain LBA1501, having a Tn1831 insertion in the auxin locus, were investigated for their T-DNA structure and expression. In addition to clones with the expected phenotype, i.e. phytohormone autonomy,
A plant oxylipin, 12-oxo-phytodienoic acid, inhibits proliferation of human breast cancer cells by targeting cyclin D1.
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Cyclin D1 overexpression has been associated with poor prognosis and resistance to therapy in human breast cancer. Thus, the development of therapeutic agents that selectively target cyclin D1 activity is of clinical interest. This study demonstrates that 12-oxo-phytodienoic acid (OPDA), a
[Role of meristem-specific genes of plants in formation of genetic tumors].
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In higher plants, homeobox genes of the KNOX and WOX subfamilies plays a key role in maintenance of the pool of stem cells, regulate proliferation, and prevent cell differentiation. It has been shown that meristem-specific genes are regulated by phytohormones and affect their metabolism,
Revertant seedlings from crown gall tumors retain a portion of the bacterial Ti plasmid DNA sequences.
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BT37 is a crown gall teratoma incited on tobacco by Agrobacterium tumefaciens containing pTi-T37, a nopaline-type Ti plasmid. Treatment of this cloned tumor tissue with kinetin at 1 mg/liter results in the formation of relatively normal-appearing shoots. These shoots can be induced to root and set
Comparison of T-DNA oncogene complements of Agrobacterium tumefaciens tumor-inducing plasmids with limited and wide host ranges.
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The T-DNA oncogene complements of the limited-host-range tumor-inducing plasmid pTiAg63 and the wide-host-range plasmid pTiA6 were compared. The resulting data indicate that pTiAg63 has DNA sequences related to most of the genes encoded by the oncogene region, the TL-DNA, of pTiA6 and that these
Synthetic strigolactone analogues reveal anti-cancer activities on hepatocellular carcinoma cells.
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Hepatocellular carcinoma (HCC) remains one of the leading causes of death worldwide. The complex etiology is attributed to many factors like heredity, cirrhosis, hepatitis infections or the dysregulation of the different molecular pathways. Nevertheless, the current treatment regimens have either
Evidence for high activity of xylem parenchyma and ray cells in the interface of host stem and Agrobacterium tumefaciens-induced tumours of Ricinus communis.
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Rapidly developing tumours at hypocotyls of Ricinus communis, induced by Agrobacterium tumefaciens strain C58, were characterized by strong differentiation of vascular bundles and their functional connection to the host bundles. The stem/tumour interface showed increased xylem, with numerous vessels
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