Synthesis biological screening and molecular docking studies of some tin (IV) Schiff base adducts

Published on Nov 1, 2016in Journal of Photochemistry and Photobiology B-biology4.07
· DOI :10.1016/j.jphotobiol.2016.09.018
Wajid Rehman15
Estimated H-index: 15
(HU: Hazara University),
Rehana Yasmeen2
Estimated H-index: 2
(Gomal University)
+ 5 AuthorsKhurshid Ayub23
Estimated H-index: 23
(CUI: COMSATS Institute of Information Technology)
Abstract The search for an alternative to platinum anticancer agents is a major motivation for continuing investigations concerning the antitumor properties of other transition metal-based compounds. Keeping this in view, synthesis, antitumor and antimicrobial activity of diorganotin (IV) complexes was studied. A novel series of diorganotin (IV) complexes of the Schiff base ligand derived from 7-methoxy-2-hydroxy-1-naphthaldehyde, 1,2-phenylenediamine, Salicylaldehyde were synthesized. Physical and spectral examination was done through various techniques using elemental analyses, IR, 1 H, 13 C, 119 Sn NMR, and 119m Sn Mossbauer techniques respectively. The results obtained are in good agreement with 1:1:1 stoichiometry of Schiff base and 2:1 stoichiometry of the complexes. Octahedral geometry was assigned to all the synthesized complexes within six (6) coordination number around the tin. Antitumor activity was screened against human oral epidermoid carcinoma (KB) cell line. The diethyltin (IV) complex 2 showed the most promising cytotoxic results (IC 50  = 0.35 μ M) against the cell line which is comparable with cisplatin (IC 50  = 0.37 μ M). Docking studies revealed that these complexes can bind favorably within cisplatin binding site and the binding energy of complex 2 is more than that of cisplatin. Furthermore, binding of these complexes on human topoisomerase IIα enzyme and revealed that these complexes intercalating within the inter-strand of DNA showing interactions with DNA as well as protein that may results in DNA damage and cell death.
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