Linked Life Data

1694966

Source:http://linkedlifedata.com/resource/pubmed/id/1694966

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1990-8-13
pubmed:abstractText
The aromatic amine 9-amino-ellipticine is a synthetic DNA intercalating compound derived from the antitumor agent ellipticine, which cleaves at very low doses DNA containing apurinic sites by beta-elimination through formation of a Schiff base. This compound has been shown to potentiate the cytotoxic effect of alkylating drugs, such as dimethyl sulfate, in E. coli through a mechanism involving apurinic sites. We have studied the ability of 9-amino-ellipticine to inhibit an enzymatic repair system mimicking base-excision repair, in which E. coli exonuclease III only presents an endonuclease for apurinic/apyrimidinic site activity. 10 microM of 9-amino-ellipticine inhibits 70% of apurinic site repair. Other intercalating agents with similar affinities for DNA do not induce any inhibition. In another system designed for the direct assay of the exonuclease III-induced incisions 5' to AP sites 10 microM of 9-amino-ellipticine inhibits 65% of the endonuclease for apurinic/apyrimidinic site activity of E. coli exonuclease III. The 9-amino-ellipticine-induced formation of a 2',3'-unsaturated deoxyribose and cleavage at the 3' side of the apurinic site, and possible creation of an adduct, as suggested by Bertrand and coworkers (1989), on the 3' position of the deoxyribose seem to strongly inhibit the endonuclease for apurinic/apyrimidinic site activity. 9-Amino-ellipticine appears therefore to be the first small ligand which can inhibit, by an irreversible modification of the substrate, the repair of apurinic sites through the base excision-repair pathway at a pharmacological concentration.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/9-aminoellipticine, http://linkedlifedata.com/resource/pubmed/chemical/Alkaloids, http://linkedlifedata.com/resource/pubmed/chemical/Apurinic Acid, http://linkedlifedata.com/resource/pubmed/chemical/DNA-(Apurinic or Apyrimidinic..., http://linkedlifedata.com/resource/pubmed/chemical/Deoxyribonuclease IV (Phage..., http://linkedlifedata.com/resource/pubmed/chemical/Ellipticines, http://linkedlifedata.com/resource/pubmed/chemical/Endodeoxyribonucleases, http://linkedlifedata.com/resource/pubmed/chemical/Escherichia coli Proteins, http://linkedlifedata.com/resource/pubmed/chemical/Exodeoxyribonucleases, http://linkedlifedata.com/resource/pubmed/chemical/Intercalating Agents, http://linkedlifedata.com/resource/pubmed/chemical/ellipticine, http://linkedlifedata.com/resource/pubmed/chemical/endonuclease IV, E coli, http://linkedlifedata.com/resource/pubmed/chemical/exodeoxyribonuclease III
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0027-5107
pubmed:author
pubmed:issnType
Print
pubmed:volume
236
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
9-17
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
9-amino-ellipticine inhibits the apurinic site-dependent base excision-repair pathway.
pubmed:affiliation
Laboratoire de Biochimie-Enzymologie, URA 158 CNRS, U 140 INSERM, Institut Gustave Roussy, Villejuif, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't