@article {2389,
	title = {Cytotoxicity of the traditional chinese medicine (TCM) plumbagin in its copper chemistry},
	journal = {Dalton Transactions},
	number = {48},
	year = {2009},
	note = {ISI Document Delivery No.: 527IETimes Cited: 3Cited Reference Count: 96Chen, Zhen-Feng Tan, Ming-Xiong Liu, Li-Min Liu, Yan-Cheng Wang, Heng-Shan Yang, Bin Peng, Yan Liu, Hua-Gang Liang, Hong Orvig, Chris},
	pages = {10824-10833},
	type = {Article},
	abstract = {The anticancer traditional Chinese medicine (TCM), plumbagin (PLN), was isolated from Plumbago Zeylanica. Reaction of plumbagin with Cu-II salt, afforded [Cu(PLN)(2)]center dot 2H(2)O (1). With 2,2{\textquoteright}-bipyridine (bipy) as a co-ligand, PLN reacts with Cu-II to give [Cu(PLN)(bipy)(H2O)](2)(NO3)(2)center dot 4H(2)O (2). 1 and 2 were characterized by elemental analysis, IR, ESI-MS spectra. Their crystal structures were determined by single crystal X-ray diffraction methods. The in vitro cytotoxicity of PLN, 1 and 2 against seven human tumour cell lines was assayed. The metal-based compounds exhibit enhanced cytotoxicity vs. that of free PLN, suggesting that these compounds display synergy in the combination of metal ions with PLN. The binding properties of PLN, 1 and 2 to DNA were investigated through UV-vis, fluorescence, CD spectra, and gel mobility shift assay, which indicated that 1 and 2 were non-covalent binding and mainly intercalated the neighboring base pairs of DNA. PLN, 1 and 2 exhibit inhibition activity to topoisomerase I (TOPO I), but 1 and 2 were more effective than PLN.},
	keywords = {BIOLOGICAL-ACTIVITY, CALF-THYMUS DNA, CANCER-CELLS, CRYSTAL-STRUCTURE, DNA CLEAVAGE ACTIVITY, IRON(II) COMPLEXES, METAL-COMPLEXES, N-PROPYL-NORFLOXACIN, PLATINUM ANTICANCER AGENTS, TOPOISOMERASE-I},
	isbn = {1477-9226},
	url = {<Go to ISI>://000272359900024},
	author = {Chen, Z. F. and Tan, M. X. and Liu, L. M. and Liu, Y. C. and Wang, H. S. and Yang, B. and Peng, Y. and Liu, H. G. and Liang, H. and Orvig, Chris}
}
@article {2513,
	title = {Divalent later transition metal complexes of the traditional chinese medicine (TCM) liriodenine: coordination chemistry, cytotoxicity and DNA binding studies},
	journal = {Dalton Transactions},
	number = {48},
	year = {2009},
	note = {ISI Document Delivery No.: 527IETimes Cited: 1Cited Reference Count: 91Liu, Yan-Cheng Chen, Zhen-Feng Liu, Li-Min Peng, Yan Hong, Xue Yang, Bin Liu, Hua-Gang Liang, Hong Orvig, Chris},
	pages = {10813-10823},
	type = {Article},
	abstract = {Liriodenine (L), a natural alkaloid, was isolated as an active component from the anticancer traditional Chinese medicine (TCM), Zanthoxylum nitidum. It reacted with Mn-II, Fe-II, Co-II and Zn-II to afford four metal complexes: [MnCl2(L)(2)] (1), [FeCl2(L)(2)] (2), [Co(L)(2)(H2O)(2)center dot Co(L)(2)(CH3CH2OH)(2)](ClO4)(4) (3), and [Zn-2(L)(2)(mu(2)-Cl)(2)Cl-2] (4), which were characterized by elemental analysis, IR, ESI-MS. Their crystal structures were determined by the single crystal X-ray diffraction method. The in vitro cytotoxicity of L and complexes 1-4 against 10 human tumour cell lines was assayed. Some of these metal-based compounds exhibited enhanced cytotoxicity vs. free L to selected tumour cell lines. The binding properties of L and its complexes 1-4 to ct-DNA were investigated by spectroscopic methods and viscosity measurements. Agarose gel electrophoresis experiments were also carried out to evaluate their unwinding ability towards plasmid DNA and their inhibition towards Topoisomerase I. All the results indicate that complexes 1-4 may bind more intensively to the DNA helix than does L, and intercalative binding for complexes 1-4 and electrostatic interactions for complexes 3-4 to DNA should be considered. For complex 4, covalent binding to DNA may exist. Of special note, all these metal complexes effectively inhibit Topoisomerase I even at low concentration (<= 10 mu M).},
	keywords = {antitumor agents, CISPLATIN, CRYSTAL-STRUCTURE, GEL-ELECTROPHORESIS, INHIBITION, INNOVATIVE COMBINATION, INTERCALATION, PLATINUM ANTICANCER AGENTS, RUTHENIUM(II) COMPLEXES, TOPOISOMERASE-I},
	isbn = {1477-9226},
	url = {<Go to ISI>://000272359900023},
	author = {Liu, Y. C. and Chen, Z. F. and Liu, L. M. and Peng, Y. and Hong, X. and Yang, B. and Liu, H. G. and Liang, H. and Orvig, Chris}
}
