Linked Life Data

10747955

Source:http://linkedlifedata.com/resource/pubmed/id/10747955

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pubmed-article:10747955pubmed:abstractTextInteractions of high mobility group (HMG) domain proteins with DNA modified by cisplatin plays a role in mechanisms underlying its antitumor activity. A structural motif recognized by HMG domain proteins on cisplatin-modified DNA is a stable, directional bend of the helix axis. In the present work, bending induced in DNA by major adducts of a novel class of antitumor compounds, represented by the formula [¿trans-PtCl(NH(3))(2)¿H(2)N(CH(2))(2-6)NH(2)]Cl(2), was investigated. The oligodeoxyribonucleotide duplexes containing various site-specific interstrand cross-links of these bifunctional dinuclear platinum drugs were purified and characterized by Maxam-Gilbert footprinting, chemical probing, and phasing assay. It was demonstrated that the cross-links of the dinuclear compounds bent the helix much less than those of cisplatin. Gel retardation assay revealed very weak recognition of DNA adducts of dinuclear complexes by HMG1 protein. Hence, the mediation of antitumor properties of dinuclear platinum complexes by HMG domain proteins is unlikely so that polynuclear platinum compounds may represent a novel class of platinum anticancer drugs acting by a different mechanism than cisplatin and its analogues. A further understanding of how polynuclear platinum compounds modify DNA and how these modifications are processed in cells should provide a rational basis for the design of new platinum drugs rather than searching for cisplatin analogues.lld:pubmed
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pubmed-article:10747955pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:10747955pubmed:articleTitleSequence specificity, conformation, and recognition by HMG1 protein of major DNA interstrand cross-links of antitumor dinuclear platinum complexes.lld:pubmed
pubmed-article:10747955pubmed:affiliationInstitute of Biophysics, Academy of Sciences of the Czech Republic, CZ-61265 Brno, Czech Republic.lld:pubmed
pubmed-article:10747955pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10747955pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
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