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Title: Copper(ii) salen-based complexes as potential anticancer agents
Authors: Mohan, N
Vidya, CV
Vasudevan, S
Jimna, MA
Kasoju, N
Mohanan, PV
Sreejith, SS
Prathapachandra Kurup, MR
Issue Date: May-2022
Publisher: New Journal of Chemistry
Citation: Mohan N, Vidya CV, Vasudevan S, Jimna MA, Kasoju N, Mohanan PV, Sreejith SS, Prathapachandra Kurup MR. Copper (II) Salen based Complexes as Potential Anticancer Agents. New Journal of Chemistry. 2022 May 26 ;46(26):12540-12550
Abstract: In this work, we have systematically designed and synthesized four Cu(II) salen compounds (1–4), which have been characterized using various spectroscopic and analytical techniques. Single-crystal XRD studies were carried out on three of the compounds (1, 2 and 4), which revealed that all of them have a water molecule encapsulated/pseudo-encapsulated in the N2O4 cavity. The binding affinity of the complexes with calf thymus DNA (CT-DNA) was explored using UV-visible and fluorescence techniques. The compounds exhibit excellent DNA binding and cleavage activities. The binding mechanism was probed by molecular docking studies. These results display high binding-constant values owing to the intercalative type of binding. In addition, the binding affinity of the compounds with proteins was also studied via an in silico molecular-docking method using human serum albumin as the receptor. The in vitro cytotoxic effect of the complexes was evaluated in the HeLa cell line, derived from cervical cancer cells. The cleavage of DNA strands was investigated using gel electrophoresis. All of the tested compounds show a high binding-constant value with both DNA and protein and exhibit cytotoxic effects towards cancerous cells. The observed toxicity of these compounds towards a normal cell line could be minimized via interaction of the metal centre with the detoxifier glutathione, and detoxification studies were also conducted. The synthesized compounds were found to be potential candidates for the pharmaceutical industry. Considering the results and compared with existing reports, we propose a promising candidate (compound 4) for the development of efficient therapeutic drugs.
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