Conformer Distribution in (cis-1,4-DACH)bis(guanosine-5′-phosphate)platinum(II) Adducts: A Reliable Model for DNA Adducts of Antitumoral Cisplatin
摘要:
In [PtCl2(CiS-1,4-DACH)] (DACH = diaminocyclohexane), the N-Pt-N bite angle (>= 97 degrees, as determined by X-ray diffraction analysis) is much larger than those found in other Pt complexes with bidentate diamines or in cisplatin (910). Hence, the possibility exists that in (cis-1,4-DACH)PtG(2) adducts, rotation of the G's around the Pt-N7 bonds is slowed enough to allow observation of different conformers. In accord with this prevision, decreasing the temperature to 238 K enabled us to observe different conformers of (cis-1,4-DACH)Pt(5'-GMP)2 (GMP = guanosine monophosphate). This observation is the first case in which such conformers for a platinum derivative with primary diamines and untethered guanines have been resolved and represents the closest model to clinically effective cisplatin obtained to date. We also found that the presence of the 1,4-DACH ligand increased the intensity of the circular dichroism signal stemming from the dominance of an HT conformer (Delta HT in the adduct with 3'-GMPs and Lambda HT in the adduct with 5'-GMPs).
PLATINUM COMPOUNDS FOR TREATING CELL PROLIFERATIVE DISEASES, PREPARATION METHOD AND USE THEREOF
申请人:Chen Xiaoping
公开号:US20140142079A1
公开(公告)日:2014-05-22
Disclosed are a class of platinum compounds with a leaving group of malonic acid derivatives containing amino and alkylamino, their pharmaceutically acceptable salts, their preparation methods and pharmaceutical composites comprising them. Disclosed also are for the uses of the compounds in the treatment of cell proliferative diseases, particularly for the treatment of cancers. The present platinum compounds have high water solubility and low toxicity.
DNA fragment conformations in adducts with Kiteplatin
作者:Nicola Margiotta、Emanuele Petruzzella、James A. Platts、Shaun T. Mutter、Robert J. Deeth、Rosa Ranaldo、Paride Papadia、Patricia A. Marzilli、Luigi G. Marzilli、James D. Hoeschele、Giovanni Natile
DOI:10.1039/c4dt01796j
日期:——
The anticancer-active platinum complex with cis-1,4-diaminocyclohexane has proved to be very valuable in detecting multiple conformers in adducts with oligonucleotides.