DNA interaction with dipolar ruthenium(II) ammine complexes containing 4,4′-bipyridinium as photochemotherapeutic agents
作者:Yasuo Nakabayashi、Hitomi Nakamura、Yuya Kubota、Mika Morimoto、Tomotaka Kawasaki、Misaki Nakai、Osamu Yamauchi
DOI:10.1016/j.ica.2014.07.071
日期:2014.11
DNA with dipolar ruthenium(II) ammine complexes containing 4,4′-bipyridinium cations L+, [Ru(L+)(NH3)5]3+, has been investigated by spectroscopic and electrochemical methods. These ruthenium(II) complexes undergo strong stacking interactions of L+ with the base-pairs of DNA duplex in addition to the electrostatic and hydrogen binding modes. The phbp+ ([2]3+) and pymbp+ ([3]3+) complexes bind to DNA more
通过光谱和电化学方法研究了DNA与含有4,4'-联吡啶阳离子L +,[Ru(L +)(NH 3)5 ] 3+的偶极钌(II)胺配合物的相互作用。这些钌(II)络合物除了具有静电和氢键结合模式外,还经历了L +与DNA双链体碱基对的强堆积反应。phbp +([[ 2 ] 3+)和pymbp +([ 3 ] 3+)复合物与DNA的结合比mebp +([ 1 ] 3+由于存在扩展的平面型芳香族配体,因此)。[ 3 ]与DNA相互作用最强的3+可以在光诱导的配体pymbp +和NH 3损失后与超螺旋质粒pBR322 DNA结合。该发现导致有氧和无氧条件下可见光对[ 3 ] 3+的超螺旋质粒pBR322 DNA进行了光裂解。由于已观察到[ 1 ] 3+和[ 2 ] 3+的相似光解作用,因此所有带有4,4'-联吡啶阳离子的偶极钌(II)胺络合物都可以作为O 2起作用。-独立的光化学治疗剂。