期刊
JOURNAL OF INORGANIC BIOCHEMISTRY
卷 234, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2022.111870
关键词
Homobinuclear ruthenium (II) complex; DNA condensation; Atomic force microscopy; Transmission electron microscopy; Dynamic light scattering; Cytotoxicity
资金
- Department of Science and Technology (DST), New Delhi, India [SR/S1/IC-25/2010]
- Science and Engineering Research Board (SERB), India [CRG/2018/001882]
- Council of Scientific and Industrial Research (CSIR), India
- Institute Postdoctoral Fellowship (IPDF), IIT Bombay
The binuclear Ru(II) polypyridyl complexes were synthesized and their interactions with CT-DNA were studied, showing their ability to condense DNA by reducing DNA viscosity, forming nanosized globular aggregates, and inducing the formation of orderly particles in supercoiled plasmid DNA. The complexes exhibited moderate cytotoxicity against MCF-7 cells.
Binuclear Ru(II) polypyridyl complexes [Ru2(N-N)4(BIPMB)]4+ (1-4), where N-N = 2,2'-bipyridine (bpy), 1,10phenanthroline (phen), dipyrido [3,2-d:2',3'-f] quinoxaline (dpq), and dipyrido[3,2-a:2',3'-c]phenazine (dppz), have been synthesized using suitable precursors and bridging ligand (BIPMB), where BIPMB = 3,3'-bis-{(imidazol-1-yl)-[4,5-f]-1,10-phenanthroline) methyl}-1,1'-biphenyl. The binding mode and affinity of complexes 1-4 with Calf Thymus DNA (CT-DNA) were determined by absorption and steady-state fluorescence spectroscopy. The decrease in viscosity of CT-DNA on sequential addition of these complexes indicated DNA condensation and the result was corroborated by circular dichroism (CD). The nanosized globular aggregates of CT-DNA induced by complexes 1-4 were observed by dynamic light scattering (DLS) and transmission electron microscopy (TEM) measurements. The gel electrophoretic mobility studies revealed the small orderly particles of supercoiled plasmid pBR322 DNA induced by these complexes. Additionally, the morphology and size of compact plasmid DNA condensates were studied by DLS and atomic force microscopy (AFM). The complexes were moderately cytotoxic against MCF-7 cells.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据