Journal
JOURNAL OF INORGANIC BIOCHEMISTRY
Volume 100, Issue 1, Pages 36-43Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2005.09.012
Keywords
lanthanum(III); 1,10-phenanthroline; cytotoxic activity; DNA-binding
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Two novel lanthanum(III) complexes containing 2-methylene-1,10-phenanthroline units bridged by aliphatic diamines were synthesized and characterized by elemental analysis, IR, NMR, thermal analysis and conductance measurements. They have been assayed for anticancer activity in vitro against HL-60 (human leukocytoma) cells, PC-3MIE8 (human prostate carcinoma) cells, BGC-823 (human stomach carcinoma) cells, MDA-MB-435 (human galactophore carcinoma) cells, Bel-7402 (human liver carcinoma) cells, and Hela (human cervix carcinoma) cells. The results show that the two complexes exhibit good cytotoxic activities against different cell lines in general, especially more effective than cisplatin against Bel-7402, BGC-823 and MDA-MB-435 cell lines. DNA-binding studies indicate that, besides the intercalation, the complexes bind to DNA by the other interaction(s), which might be responsible for the production of more compact DNA, coinciding with more A-like feature of DNA as suggested by CD spectra. (C) 2005 Elsevier Inc. All rights reserved.
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