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Kapustina AA, Tupolova YP, Popov LD, Vlasenko VG, Gishko KB, Berejnaya AG, Shcherbatykh AA, Golubeva YA, Klyushova LS, Lider EV, Lazarenko VA, Demidov OP, Knyazev PA, Bachurin SS, Nalbandyan VB, Shcherbakov IN. Copper(II) coordination compounds based on bis-hydrazones of 2,6-diacetylpyridine: synthesis, structure, and cytotoxic activity. Dalton Trans 2024; 53:3330-3347. [PMID: 38261350 DOI: 10.1039/d3dt03750a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
By reacting a series of 2,6-diacetylpyridine bis-hydrazones containing pyrimidine (H2L1), benzimidazole (H2L2) and phthalazine (H2L3) heterocyclic fragments with copper(II) chloride and bromide, a variety of pentacoordinated complexes of the composition [Cu(H2L1)X]X, [Cu(HL2)X] and [Cu(HL3)X], where X = Cl-, Br-, are formed. The properties and structure of the compounds were studied by means of NMR, IR, UV-vis, ESR, and X-ray absorption spectroscopy, cyclic voltammetry and X-Ray single crystal diffraction methods. It was shown that complexes of the cationic type [Cu(H2L1)X]X have an asymmetric structure with a distorted square-pyramidal geometry of the coordination unit. The coordination polyhedron of metal chelates [Cu(HL2)X] and [Cu(HL3)X] is an almost ideal square pyramid. Investigations of the cytotoxic activity of the obtained compounds in vitro on human hepatocellular carcinoma (HepG2) and non-tumor human lung fibroblast (MRC-5) cell lines demonstrated that complexes show higher activity compared with the well-known anticancer agent cisplatin. In addition, metal chelates [Cu(H2L1)Cl]Cl, [Cu(HL2)Cl], [Cu(HL2)Br] and [Cu(HL3)Cl] were less toxic to non-tumor cells MRC-5. A study of the binding of complexes to bovine serum albumin (BSA) protein using fluorescence spectroscopy showed that copper complexes are strongly bound to BSA. To study the mechanism of interaction of the complexes with the DNA of cancer cells, molecular dynamics simulation of the compound [Cu(HL3)Cl] was carried out. It was shown that the complex enters into π-stacking interactions predominantly with adenine and thymine bases.
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Affiliation(s)
- Anna A Kapustina
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
| | - Yulia P Tupolova
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
| | - Leonid D Popov
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
| | - Valery G Vlasenko
- Scientific Research Institute of Physics, Southern Federal University, Rostov-on-Don, 344090, Russia
| | - Konstantin B Gishko
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
| | - Alexandra G Berejnaya
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
| | | | - Yuliya A Golubeva
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Acad. Lavrentiev Ave., 630090, Novosibirsk, Russia
| | - Lyubov S Klyushova
- Institute of Molecular Biology and Biophysics, Federal Research Center of Fundamental and Translational Medicine (IMBB FRC FTM), 2/12, Timakova str., 630060, Novosibirsk, Russia
| | - Elizaveta V Lider
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Acad. Lavrentiev Ave., 630090, Novosibirsk, Russia
| | - Vladimir A Lazarenko
- National Research Center "Kurchatov Institute", Acad. Kurchatov Sq., 1, Moscow, 123182, Russia
| | - Oleg P Demidov
- Department of Organic Chemistry, North Caucasus Federal University, Stavropol, 355017, Russia
| | - Pavel A Knyazev
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachki st, Rostov-on-Don, 344090, Russian Federation
| | - Stanislav S Bachurin
- Department of General and Clinical Biochemistry N2, Rostov State Medical University, Rostov-on-Don, 344022, Russia
| | - Vladimir B Nalbandyan
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
| | - Igor N Shcherbakov
- Department of Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia.
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