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Issue 5, 2015
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BODIPY appended copper(ii) complexes of curcumin showing mitochondria targeted remarkable photocytotoxicity in visible light

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Abstract

Copper(II) complexes of BODIPY (borondipyrromethene) derivatives (L1, L2) and curcumin (Hcur), viz. [Cu(L1)(cur)]Cl (1) and [Cu(L2)(cur)]Cl (2), where L1 and L2 are the non-iodinated and diiodinated BODIPY appended dipicolylamine ligands, are prepared and characterized and their photocytotoxic activity in visible light studied. Binding to copper(II) has rendered stability to curcumin from its hydrolytic degradation in buffer medium. The complexes show mitochondrial localization in HeLa cells emphasizing the findings that both 1 and 2 are mitochondria-targeting complexes and induce cancer cell death. Complex 1 with a fluorophoric BODIPY moiety in L1 gave IC50 values of 7.9(±0.3) μM in visible light (400–700 nm) and 29.1(±0.5) μM in the dark. Complex 2 having a diiodo BODIPY moiety in L2 as a photosensitizer gave IC50 values of 3.8(±0.2) μM in visible light and 32.1(±0.4) μM in the dark. The PDT effect of 2 is comparable to that of Photofrin®, an FDA approved PDTdrug. Cell death follows an apoptotic pathway with the formation of reactive oxygen species (ROS).

Graphical abstract: BODIPY appended copper(ii) complexes of curcumin showing mitochondria targeted remarkable photocytotoxicity in visible light

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Publication details

The article was received on 20 Sep 2014, accepted on 11 Feb 2015 and first published on 12 Feb 2015


Article type: Concise Article
DOI: 10.1039/C4MD00425F
Med. Chem. Commun., 2015,6, 846-851

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    BODIPY appended copper(II) complexes of curcumin showing mitochondria targeted remarkable photocytotoxicity in visible light

    A. Bhattacharyya, A. Dixit, K. Mitra, S. Banerjee, A. A. Karande and A. R. Chakravarty, Med. Chem. Commun., 2015, 6, 846
    DOI: 10.1039/C4MD00425F

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