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isopentenyl adenosine/cancro
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Cytotoxic effects of Eleutherococcus senticosus aqueous extracts in combination with N6-(delta 2-isopentenyl)-adenosine and 1-beta-D-arabinofuranosylcytosine against L1210 leukemia cells.
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The use of the aqueous extracts of Eleutherococcus senticosus in combination with either cytarabine or N6-(delta 2-isopentenyl)-adenosine gave additive antiproliferative effects against L1210 murine leukemia. The ED50 for E. senticosus root extracts against L1210 cells was approximately 75
Putative role of the adenosine A(3) receptor in the antiproliferative action of N (6)-(2-isopentenyl)adenosine.
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We tested a panel of naturally occurring nucleosides for their affinity towards adenosine receptors. Both N (6)-(2-isopentenyl)adenosine (IPA) and racemic zeatin riboside were shown to be selective human adenosine A(3) receptor (hA(3)R) ligands with affinities in the high nanomolar range (K (i)
Antineoplastic effects of N6-(delta 2-isopentenyl)adenosine against L-1210 mouse lymphocytic leukemic cells using a polymeric delivery system.
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N6-(delta 2-Isopentenyl)adenosine (I), a nucleoside previously shown to be cytotoxic against several types of tumor cells, was impregnated in silicone polymer monolithic disc devices for release in vitro against lymphocytic mouse leukemia cells. Plotting the cumulative amount of N6-(delta
Tumour genes in plants: T-DNA encoded cytokinin biosynthesis.
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Gene 4 from the T-region of Ti plasmids is responsible for cytokinin effects in crown gall cells; we investigated whether it codes for an enzyme of hormone biosynthesis. In a first set of experiments, gene 4 from octopine plasmid pTiAch5 and nopaline plasmid pTiC58 was expressed in Escherichia coli,
Ribosylzeatin and zeatin in tobacco crown gall tissue.
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Cytokinins were extracted from two cultures of tobacco crown gall tumor tissue: an unorganized tissue and a teratoma which produced leafy shoots. On Sephadex LH-20 column chromatography, extracts of both types of tissue yielded two peaks of cytokinin activity with elution volumes similar to
Plant hormones increase efficiency of reprogramming mouse somatic cells to induced pluripotent stem cells and reduce tumorigenicity.
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Reprogramming of somatic cells into induced pluripotent stem (iPS) cells by defined pluripotency and self-renewal factors has taken stem cell technology to the forefront of regenerative medicine. However, a number of challenges remain in the field including efficient protocols and the threat of
3-Hydroxy-3-methylglutaryl coenzyme a reductase and isoprenylation inhibitors induce apoptosis of vascular smooth muscle cells in culture.
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Recent evidence suggests that apoptosis may be involved in the control of vascular smooth muscle cell (VSMC) number in atherosclerotic lesions. 3-Hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors have been reported to induce apoptosis in a variety of tumor cell lines. To evaluate
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