Structural Factors Affecting Binding of Platinum Anticancer Agents with Phospholipids: Influence of Charge and Phosphate Clamp Formation
作者:Anil Kumar Gorle、Junyong Zhang、Qin Liu、Susan J. Berners‐Price、Nicholas P. Farrell
DOI:10.1002/chem.201705822
日期:2018.3.26
electrostatically to two additional DHPA molecules via phosphate clamp interactions, in an extended network. For both 1,0,1/t,t,t (1) and 1,1/t,t (2), equilibrium conditions are obtained more slowly (>35 h) than in the presence of phosphate (12 h) and in each case the rate constant for the first step of DHPA binding (kL) is about 8 times higher than that for phosphate, whereas the rate constants for the reverse
我们报告了多核铂抗癌剂(PPC)与带负电荷的磷脂相互作用作为其细胞摄取机制的详细的NMR和DFT研究。完全15 N标记的[反-PtCl(NH 3)2 } 2(μ反-Pt(NH 3)2 NH 2(CH 2)6 NH 2 } 2)] 4+(15 N - 1,1,0,1 / T,T,T)和双核[反式-PtCl(NH 3)2} 2 μ-H 2 N(CH 2)6 NH 2 }] 2+(15 N- 2,1,1 / T,T)与的钠盐1,2- dihexanoyl- SN -glycero -3-通过[ 1 H,15 N] HSQC 2D NMR光谱研究了磷酸盐(DHPA)在298 K,pH≈5.4时的情况。两个15 N- 1和15 N- 2形式的初始单加合物,其中所述DHPA经由磷酸氧原子配位。对于双核15 N- 2,第二DHPA在两个不同方向上的配位,导致双功能加合物的两个构象异构体。对于15