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Synthesis, Characterization, and DNA-Binding Kinetics of New Pd(II) and Pt(II) Thiosemicarbazone Complexes: Spectral, Structural, and Anticancer Evaluation
Joint Authors
Onani, Martin O.
Meyer, Mervin
Mbugua, Simon N.
Njenga, Lydia W.
Odhiambo, Ruth A.
Wandiga, Shem O.
Sibuyi, Nicole
Lalancette, Roger A.
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-06-27
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
In a bid to come up with potential anticancer agents, a class of thiosemicarbazone ligands bearing substituted thiophene were synthesized followed by complexation with various Pd(II) and Pt(II) metal precursors.
The ligands (E)-1-((thiophen-2-yl)methylene)thiosemicarbazide (L1), (E)-1-((4-bromothiophen-2-yl)methylene)thiosemicarbazide (L2), and (E)-1-((5-bromothiophen-2-yl)methylene)thiosemicarbazide (L3) were synthesized by condensation reactions and obtained in good yields.
Complexation of L1 and L2 with Pd(cod)Cl2 gave C1 (C6H7Cl2N3PdS2) and C2 (C6H6BrCl2N3PdS2), respectively.
Complexation of L1 with K2PtCl4 gave C3 (C6H7Cl2N3PtS2), while L3 with K2PtCl2[(PPh)3]2 gave C4 (C24H21BrClN3PPtS2).
The structures and coordination for all compounds were established by FTIR, 1H-NMR, 13C-NMR, UV-Vis, elemental analysis, and single-crystal X-ray diffraction studies for ligand L1.
Tuning of the spectral and anticancer activity of the compounds was investigated by changing the position of the bromide substituent, metal center, and the σ or π-donor/acceptor strength of the groups surrounding the metal center.
The compounds had low to moderate anticancer potency with their spectral and structural properties correlating with the corresponding anticancer activity profiles.
DNA binding modes were studied by spectroscopy and were comparable to known DNA intercalators.
Structure-activity profiles were evident especially between C1 and C2 differing by the presence of a Br in position 5 of thiophene ring, which caused a remarkable increase in IC50 values, from 14.71 ± 0.016 (C1) to 43.08 ± 0.001(C2) in Caco-2 cells, 1.973 ± 0.048 (C1) to 59.56 ± 0.010 (C2) in MCF-7 cells, 16.65 ± 0.051 (C1) to 72.25 ± 0.003 (C2) in HeLa cells, 14.64 ± 0.037 (C1) to 94.34 ± 0.003 (C2) in HepG2, and 14.05 ± 0.042 (C1) to >100(C2) in PC-3 cells.
American Psychological Association (APA)
Mbugua, Simon N.& Njenga, Lydia W.& Odhiambo, Ruth A.& Wandiga, Shem O.& Meyer, Mervin& Sibuyi, Nicole…[et al.]. 2020. Synthesis, Characterization, and DNA-Binding Kinetics of New Pd(II) and Pt(II) Thiosemicarbazone Complexes: Spectral, Structural, and Anticancer Evaluation. Journal of Chemistry،Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1181652
Modern Language Association (MLA)
Mbugua, Simon N.…[et al.]. Synthesis, Characterization, and DNA-Binding Kinetics of New Pd(II) and Pt(II) Thiosemicarbazone Complexes: Spectral, Structural, and Anticancer Evaluation. Journal of Chemistry No. 2020 (2020), pp.1-17.
https://search.emarefa.net/detail/BIM-1181652
American Medical Association (AMA)
Mbugua, Simon N.& Njenga, Lydia W.& Odhiambo, Ruth A.& Wandiga, Shem O.& Meyer, Mervin& Sibuyi, Nicole…[et al.]. Synthesis, Characterization, and DNA-Binding Kinetics of New Pd(II) and Pt(II) Thiosemicarbazone Complexes: Spectral, Structural, and Anticancer Evaluation. Journal of Chemistry. 2020. Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1181652
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1181652