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  • Pyridazine-based heteroleptic copper(II) complexes as potent anticancer drugs by inducing apoptosis and S-phase arrest in breast cancer cell

    Author(s)
    Rafi, Ummer Muhammed
    Mahendiran, Dharmasivam
    Devi, Venkat Gayathri
    Doble, Mukesh
    Rahiman, Aziz Kalilur
    Griffith University Author(s)
    Dharmasivam, Mahendiran
    Year published
    2018
    Metadata
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    Abstract
    A new series of heteroleptic copper(II) complexes of the type [Cu(L1−3)(diimine)](ClO4) (1–6) have been synthesized using three pyridazine-based ligands (3-chloro-6-(salicylidenehydrazinyl)pyridazine (HL1), 3-chloro-6-(4-diethylaminosalicylidenehydrazinyl)pyridazine (HL2) and 3-chloro-6-(5-bromosalicylidenehydrazinyl)pyridazine (HL3), and diimine (2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen)) as co-ligands. The ligands and their copper(II) complexes have been characterized by elemental analyses and spectroscopic methods. The copper(II) complexes display ligand-field band in the region 641–661 nm suggesting square ...
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    A new series of heteroleptic copper(II) complexes of the type [Cu(L1−3)(diimine)](ClO4) (1–6) have been synthesized using three pyridazine-based ligands (3-chloro-6-(salicylidenehydrazinyl)pyridazine (HL1), 3-chloro-6-(4-diethylaminosalicylidenehydrazinyl)pyridazine (HL2) and 3-chloro-6-(5-bromosalicylidenehydrazinyl)pyridazine (HL3), and diimine (2,2′-bipyridine (bpy) or 1,10-phenanthroline (phen)) as co-ligands. The ligands and their copper(II) complexes have been characterized by elemental analyses and spectroscopic methods. The copper(II) complexes display ligand-field band in the region 641–661 nm suggesting square pyramidal geometry. The optimized structures of the complexes and their molecular orbital calculations obtained by the density functional theory (DFT) also showed five coordinated distorted square pyramidal geometry around the copper(II) ion. The cyclic voltammetric analyses of copper(II) complexes exhibit one-electron irreversible reduction wave (Epc = −0.596 to −0.641 V) in the cathodic potential region. Anti-proliferative activity of the complexes against breast cancer MDA-MB-231 cell line was evaluated by MTT cell proliferation assay, and the clonogenic assay revealed improved cytotoxicity for the complexes with potency higher than the standard drug cisplatin. Since the complexes 3 and 4 with diethylamino substituent displayed higher anti-proliferative activity than the other complexes, these complexes were chosen for apoptosis and cell cycle analysis. The apoptosis induction was analyzed by AO/EB staining, and the flow cytometry showed the inhibition of cell growth at the S-phase of the cell cycle. Additionally, the interaction of copper(II) complexes with FGFR kinase receptor have been studied by in silico molecular docking studies.
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    Journal Title
    Inorganica Chimica Acta
    Volume
    482
    DOI
    https://doi.org/10.1016/j.ica.2018.06.007
    Subject
    Inorganic chemistry
    Physical chemistry
    Other chemical sciences
    Science & Technology
    Physical Sciences
    Chemistry
    DFT analysis
    Nuclear
    Publication URI
    http://hdl.handle.net/10072/399956
    Collection
    • Journal articles

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