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Photoactivated cytotoxicity of ferrocenyl-terpyridine oxovanadium(IV) complexes of curcuminoids

Balaji, Babu and Balakrishnan, Babita and Perumalla, Sravanakumar and Karande, Anjali A and Chakravarty, Akhil R (2014) Photoactivated cytotoxicity of ferrocenyl-terpyridine oxovanadium(IV) complexes of curcuminoids. In: EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, 85 . pp. 458-467.

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Official URL: http://dx.doi.org/ 10.1016/j.ejmech.2014.07.098


Oxovanadium(IV) complexes, viz. VO(Fc-tpy)(Curc)](ClO4) (1), VO(Fc-tpy)(bDHC)](ClO4) (2), VO(Fc-tpy)(bDMC)](ClO4) (3) and VO(Ph-tpy)(Curc)](ClO4) (4), of 4'-ferrocenyl-2,2':6',2 `'-terpyridine (Fc-tpy) and 4'-phenyl-2,2':6',2 `'-terpyridine (Ph-tpy) and monoanionic curcumin (Curc), bis-dehydroxycurcmin (bDHC) and bis-demethoxycurcumin (bDMC) were prepared, characterized and their photo-induced DNA cleavage activity and photocytotoxicity in visible light studied. The ferrocenyl complexes 1-3 showed an intense metal-to-ligand charge transfer band near 585 nm in DMF and displayed Fc(+)/Fc and V(IV)/V(III) redox couples near 0.65 V and -1.05 V vs. SCE in DMF-0.1 M TBAP. The complexes as avid binders to calf thymus DNA showed significant photocleavage of plasmid DNA in red light of 647 nm forming (OH)-O-center dot radicals. The complexes showed photocytotoxicity in HeLa and Hep G2 cancer cells in visible light of 400-700 nm with low dark toxicity. ICP-MS and fluorescence microscopic studies exhibited significant cellular uptake of the complexes within 4 h of treatment with complexes. The treatment with complex 1 resulted in the formation of reactive oxygen species inside the HeLa cells which was evidenced from the DCFDA assay. (C) 2014 Elsevier Masson SAS. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 23 RUE LINOIS, 75724 PARIS, FRANCE
Keywords: Medicinal chemistry; Vanadium; Curcuminoids; Ferrocene; Photocytotoxicity; Cellular imaging
Department/Centre: Division of Biological Sciences > Biochemistry
Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 14 Nov 2014 07:26
Last Modified: 14 Nov 2014 07:26
URI: http://eprints.iisc.ac.in/id/eprint/50255

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