期刊
BIOCHEMICAL PHARMACOLOGY
卷 79, 期 2, 页码 112-121出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bcp.2009.08.009
关键词
Antitumor; Dinuclear platinum complex; DNA damage; DNA repair; RNA polymerase II; Glutathione
资金
- Ministry of Education [LC06030, 6198959216, ME08017, OC08003, OC09018]
- Academy of Sciences of the Czech Republic [1QS500040581, KAN200200651, M200040901, AV0Z50040507, AV0Z50040702]
- Grant Agency of the Academy of Sciences of the CR [IAA400040803, 301/09/H004]
Reported herein is a detailed biochemical and molecular biophysics study of the molecular mechanism of action of antitumor dinuclear Pt-II complex [{PtCl(DACH)}(2)-mu-Y](4+) [DACH = 1,2-diaminocyclohexane, Y = H2N(CH2)(6)NH2(CH2)(2)NH2(CH2)(6)NH2] (Complex 1). This new, long-chain bifunctional dinuclear Pt-II complex is resistant to metabolic decomposition by sulfur-containing nucleophiles. The results show that DNA adducts of I can largely escape repair and yet inhibit very effectively transcription so that they should persist longer than those of conventional cisplatin. Hence, they could trigger a number of downstream cellular effects different from those triggered in cancer cells by DNA adducts of cisplatin. This might lead to the therapeutic effects that could radically improve chemotherapy by platinum complexes. In addition, the findings of the present work make new insights into mechanisms associated with antitumor effects of dinuclear/trinuclear Pt-II complexes possible. (C) 2009 Elsevier Inc. All rights reserved.
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