Linked Life Data

14695837

Source:http://linkedlifedata.com/resource/pubmed/id/14695837

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2003-12-29
pubmed:abstractText
Water-soluble diorganyl tellurides of the alkyl aryl or dialkyl type were prepared by treatment of mono-6-tosyl-beta-cyclodextrin with sodium alkanetellurolates or arenetellurolates or sodium telluride. The novel cyclodextrin-derived organotelluriums were evaluated for their capacity to catalyze the reduction of hydrogen peroxide, tert-butyl hydroperoxide, and cumene hydroperoxide in the presence of glutathione, NADPH, and GSSG-reductase (coupled reductase assay). Cyclodextrins 4d and 4e, carrying 4-(N,N-dimethylamino)phenyltelluro and n-butyltelluro groups, respectively, were the most efficient glutathione peroxidase mimics. Reduction of lipophilic cumene hydroperoxide often proceeded 10-20 times faster than reduction of the more hydrophilic hydroperoxides, which cannot bind into the hydrophobic interior of the cyclodextrin. Thus, it seems that the carbohydrate moiety acts as a binding site for the hydroperoxide substrate. The cyclodextrin derivatives were also evaluated for their capacity to inhibit thioredoxin reductase/thioredoxin and cancer cell growth in culture. IC(50) values for inhibition of thioredoxin or thioredoxin/thioredoxin reductase were in the submicromolar range for the best inhibitors (compounds 4d and 5). Two of the compounds (4c and 5) were found to inhibit the growth of MCF-7 cells in culture with IC(50) values in the low micromolar range.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-2623
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
233-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Cyclodextrin-derived diorganyl tellurides as glutathione peroxidase mimics and inhibitors of thioredoxin reductase and cancer cell growth.
pubmed:affiliation
Department of Organic Chemistry, Institute of Chemistry, Uppsala University, Box 599, S-751 24 Uppsala, Sweden.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't