galactitol/cáncer

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The effect of dibromo-dulcitol and dianhydro-dulcitol (galactitol) on RNA synthesis in ascites tumor cells.

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The mechanism of action on RNA synthesis of anticancer dibromo-dulcitol (DBD, NSC-104800) and dianhydro-dulcitol (DAD, or elsewhere dianhydrogalactitol, DAG, NSC-132313) was investigated. Rats, bearing Yoshida or Novikoff hepatoma ascites tumor cells sensitive to these drugs were treated with doses

Combined treatment of anaplastic astrocytoma (grade 3-4) with diacetyl-dianhydro-galactitol (DADAG).

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Autoradiographic studies of labeled diacetyldianhydro-galactitol (DADAG) with tumor bearing animals revealed that the CNS accumulates high amounts of DADAG-derived radioactivity and the elimination from the brain seems to be relatively slow. This observation and the activity of DADAG against murine

Some strategies for improving specificity and sensitivity in the analysis of anti-cancer drugs.

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Some approaches are discussed for introducing specificity and sensitivity into analytical methods for anti-tumour agents which include a liquid chromatographic step. Various modes of HPLC have been exploited to monitor these drugs specifically and at therapeutically low levels. The use of column

Absence of cross-resistance between two alkylating agents: BCNU vs bifunctional galactitol.

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Dianhydrogalactitol (DAG) increased the life span of both BCNU-sensitive and -resistant L1210 tumor-bearing mice. However, the BCNU-resistant strain showed slightly lower sensitivity against DAG, which could be overcome by an increase in drug dose of ca. 20%. The somewhat lower sensitivity was

Production of galactitol from galactose by the oleaginous yeast Rhodosporidium toruloides IFO0880.

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Background

Sugar alcohols are commonly used as low-calorie sweeteners and can serve as potential building blocks for bio-based chemicals. Previous work has shown that the oleaginous yeast Rhodosporidium toruloides IFO0880 can natively produce arabitol from xylose at

Changes in glutathione content and resistance to anticancer agents in human stomach cancer cells induced by treatments with melphalan in vitro.

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A clone of a human gastric carcinoma cell line was used to determine whether cells which had survived a treatment with Melphalan would express altered survival responses when treated again with this agent 1 week or more later. Cells were treated for 1 h each week with 2 micrograms/ml (99% lethal

Changes in drug sensitivity of a human astrocytoma clone previously treated with 1-(2-chloroethyl)-3-(4-methylcyclohexyl)-1-nitrosourea in vitro.

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We have shown in earlier studies that repeated weekly exposures of a human astrocytoma clone (AST 3-4) to MeCCNU (10 micrograms/ml for 1 h per week) produced a linear decrease in survival over the first 3 weekly treatments. But, after that time these cells became progressively more resistant to the

Synthesis, characterization, and biological activity of oxovanadium(IV) complexes with polyalcohols.

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Oxovanadium(IV) complexes of the polyalcohols sorbitol, galactitol, and mannitol, of stoichiometry Na(2)[VO(L)(2)].H(2)O, were obtained from aqueous alkaline solutions. They were characterized by elemental analysis, infrared and UV-vis spectroscopies, thermoanalytical (thermogravimetric and

Stereocontrolled total synthesis of iminosugar 1,4-dideoxy-1,4-imino-D-iditol.

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The first stereocontrolled total synthesis of iminosugar 1,4-dideoxy-1,4-imino-D-iditol is described. The key step in our approach was the double diastereoselection in the asymmetric dihydroxylation (AD) of suitable optically active olefin, the chiral vinyl azido alcohol 9. Performing the AD using

Interaction of GGCC sequences of DNA with anticancer dianhydrogalacticol, detected by inhibition of restriction enzyme BspI.

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Interaction of DNA with 1,2-5,6-dianhydro-galactitol (DAG, NSC 132 313), a bifunctional alkylating agent used in cancer therapy was studied. Treatment of lambda phage DNA with DAG in vitro protected some of the specific cleavage sites against the restriction enzyme BspI. The extent of protection

Toxicity, antitumour and haematological effects of 1,2-anhydro-6-bromogalactitol and d-mannitol: a comparison with the related dibromo- and dianhydro-derivatives.

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1,2-Anhydro-6-bromo-6-deoxygalactitol (BrEpG) and its D-mannitol analogue (BrEpM) intermediary metabolites in the conversion of dibromodulcitol (DBD) and dibromomannitol (DBM) into dianhydrogalactitol (DAG) and dianhydromannitol (DAM) have been prepared. The three types of derivative of each hexitol

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