Linked Life Data

16509594

Source:http://linkedlifedata.com/resource/pubmed/id/16509594

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2006-3-2
pubmed:abstractText
Anthracyclines, such as daunorubicin (DNR) and doxorubicin (Dox), are widely used for cancer therapy but are limited by drug resistance and cardiotoxicity. To overcome drug resistance, we synthesized a novel class of disaccharide analogues of DNR against drug-resistant leukemia. In these disaccharide analogues (1-6) the first (inner) sugar in the carbohydrate chain is a 3-azido-2,3,6-trideoxy-L-lyxo-alpha-hexopyranose; the second (outer) sugars that are linked via alpha(1-->4) to the first sugar are a series of uncommon sugars. Their cytotoxicities were examined in drug-sensitive leukemia cells K562 and doxorubicin-resistant K562/Dox cells by MTS assay. In drug-sensitive cells, compounds 1-6 were found to be active against leukemia K562 cells with IC50 in the nanomolar range (200-1100 nM), while compounds 2-5 with 2,6-dideoxy sugars showed better activity than compounds 1 and 6 with 2,3,6-trideoxy sugars. In doxorubicin-resistant K562/Dox cells, compounds 1, 3, and 5 exhibited much better activities (with IC50 between 0.29 and 2.0 microM) than DNR (with IC50 > 5 microM). Compound 3 emerged as the most active compound, showing at least 17-fold higher activity against drug-resistant cells than parent compound DNR. The IC50 values of compound 3 in both drug-sensitive and drug-resistant cells are identical, which indicates that compound 3 completely overcomes drug resistance. Structure-activity relationship (SAR) studies showed that the substitution and orientation of the 3-OH group in the second sugar significantly influence its activity against drug-resistant leukemia. These results suggest that sugar modifications of anthracyclines change their activity and overcome drug resistance.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-2623
pubmed:author
pubmed:issnType
Print
pubmed:day
9
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1792-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Syntheses and biological activities of 3'-azido disaccharide analogues of daunorubicin against drug-resistant leukemia.
pubmed:affiliation
Department of Chemistry and Biochemistry, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't