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Jana A, Aher A, Brandao P, Bera P, Sharda S, Phadikar U, Manna SK, Mahapatra AK, Bera P. Evaluation of the anticancer activities with various ligand substituents in Co(II/III)-picolyl phenolate derivatives: synthesis, characterization, DFT, DNA cleavage, and molecular docking studies. Dalton Trans 2022; 51:2346-2363. [PMID: 35043134 DOI: 10.1039/d1dt02825a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The reactions between 2-(pyridine-2-ylmethoxy)-benzaldehyde (L) and various primary amines furnish tridentate (L1 to L3) and tetradentate (L4) chelating ligands. The choice of different primary amines in the condensation reaction incorporates the chiral carbon atom in L2 and L3. A series of mononuclear cobalt(II) complexes, [CoII(L1)(Cl)2] (1), [CoII(L2)(Cl)2]·CH3CN (2), [CoII(L3)(Cl)2] (3), and [CoIII(L4)(N3)2] (4) are synthesized in the pure crystalline state from the resulting solution of cobalt(II) chloride and/or azide and respective ligand. The new ligands and cobalt complexes are characterized using spectral (UV-Vis, 1H-NMR, IR, and HRMS), cyclovoltammetric, and DFT studies. The structure of L1, L2, and all four cobalt complexes are determined by single X-ray crystallography. Cytotoxic activity of the compounds is evaluated using three different tissues of origin e.g., U-937 (histiocytic lymphoma), HEK293T (embryonic kidney), and A549 (lung carcinoma). The cobalt complexes are more active than the corresponding ligands against U-937 and HEK293T. The MTT assay demonstrates that the cobalt compounds are more effective anticancer agents against U-937 cancer cells than HEK293T and A549. The toxicity order, 1 (7.2 ± 0.3 μM) > 3 (11.4 ± 0.6 μM) > 2 (12 ± 0.1 μM) > 4 (29 ± 1 μM) is observed against U-937 cancer cells. All the compounds induce cell death through an apoptosis mechanism and all are ineffective against PBMCs. The mechanism of activity against U937 cancer cells involves caspase-3 activation and two different mitogen-activated protein kinases attesting the programmed cell death. Among the compounds, complexes 1, 2, and 3 show DNA cleavage activity both in oxidizing (H2O2) and reducing (GSH) environments. The mechanistic study reveals that singlet oxygen (1O2) is the major species involved in DNA cleavage. The absolute chemical hardness values of the ligands and 4 are relatively higher than 1, 2, and 3, which tacitly support the DNA cleavage experiment. The docking result indicates that the compounds under investigation strongly interact with DNA base pairs through a variety of interactions which attests successfully to the experimental results. A structure-activity relationship has been drawn to correlate the variation of antitumor activity with ligand conformations.
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Affiliation(s)
- Abhimanyu Jana
- Post Graduate Department of Chemistry, Panskura Banamali College (Autonomous) (Vidyasagar University), Panskura R. S, Midnapore (East), West Bengal, 721152, India.
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, 711103, India
| | - Abhishek Aher
- Centre for DNA Fingerprinting & Diagnostics (CDFD), Hyderabad, 500 039, Telangana, India
- Graduate Studies, Regional Centre for Biotechnology, Faridabad, Haryana-121001, India
| | - Paula Brandao
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Pradip Bera
- Post Graduate Department of Chemistry, Panskura Banamali College (Autonomous) (Vidyasagar University), Panskura R. S, Midnapore (East), West Bengal, 721152, India.
- Department of Chemistry, Kandi Raj College, Murshidabad, West Bengal, 742137, India
| | - Saphy Sharda
- Centre for DNA Fingerprinting & Diagnostics (CDFD), Hyderabad, 500 039, Telangana, India
- Graduate Studies, Regional Centre for Biotechnology, Faridabad, Haryana-121001, India
| | - Ujjwal Phadikar
- Post Graduate Department of Chemistry, Panskura Banamali College (Autonomous) (Vidyasagar University), Panskura R. S, Midnapore (East), West Bengal, 721152, India.
| | - Sunil Kumar Manna
- Centre for DNA Fingerprinting & Diagnostics (CDFD), Hyderabad, 500 039, Telangana, India
- Adjunct Faculty, Regional Centre for Biotechnology, Faridabad, Haryana, 121001, India
| | - Ajit Kumar Mahapatra
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, 711103, India
| | - Pulakesh Bera
- Post Graduate Department of Chemistry, Panskura Banamali College (Autonomous) (Vidyasagar University), Panskura R. S, Midnapore (East), West Bengal, 721152, India.
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Jiang GB, Zhang WY, He M, Gu YY, Bai L, Wang YJ, Yi QY, Du F. Development of four ruthenium polypyridyl complexes as antitumor agents: Design, biological evaluation and mechanism investigation. J Inorg Biochem 2020; 208:111104. [PMID: 32485635 DOI: 10.1016/j.jinorgbio.2020.111104] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 05/04/2020] [Accepted: 05/08/2020] [Indexed: 12/21/2022]
Abstract
Ruthenium complexes are expected to be new opportunities for the development of antitumor agents. Herein, four ruthenium polypyridyl complexes ([Ru(bpy)2(CAPIP)](ClO4)2 (Ru(II)-1, bpy = 2,2'-bipyridine; CAPIP = (E)-2-(2-(furan-2-yl)vinyl)-1H-imidazo[4,5-f][1,10]phenanthroline), [Ru(phen)2(CA-PIP)](ClO4)2 (Ru(II)-2, phen = 1,10-phenanthroline), [Ru(dmb)2(CAPIP)](ClO4)2 (Ru(II)-3, dmb = 4,4'-dimethyl-2,2'-bipyridine), [Ru(dmb)2(ETPIP)](ClO4)2 (Ru(II)-4, ETPIP = 2-(4-(thiophen-2-ylethynyl)phenyl)-1H-imidazo[4,5-f][1,10]phen-anthroline)) have been investigated as mitochondria-targeted antitumor metallodrugs. DNA binding studies indicated that target Ru(II) complexes interacts with CT DNA (calf thymus DNA) by an intercalative mode. Cytotoxicity assay results demonstrate that Ru(II) complexes show high cytotoxicity against A549 cells with low IC50 value of 23.6 ± 2.3, 20.1 ± 1.9, 22.7 ± 1.8 and 18.4 ± 2.3 μM, respectively. Flow cytometry and morphological analysis revealed that these Ru(II) complexes can induce apoptosis in A549 cells. Intracellular reactive oxygen species (ROS) and mitochondrial membrane potential were also investigated by ImageXpress Micro XLS system. The experimental results indicate that the reactive oxygen species in A549 cells increased significantly and mitochondrial membrane potential decreased obviously. In addition, colocalization studies shown these complexes could get to the cytoplasm through the cell membrane and accumulate in the mitochondria. Furthermore, Ru(II) complexes can effectively induces cell cycle arrest at the S phase in A549 cells. Finally, cell invasion assay and quantitative studies were also performed to investigate the mechanism of this process. All in together, this study suggested that these Ru(II) complexes could induce apoptosis in A549 cells through cell cycle arrest and ROS-mediated mitochondrial dysfunction pathway.
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Affiliation(s)
- Guang-Bin Jiang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
| | - Wen-Yao Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Miao He
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yi-Ying Gu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Lan Bai
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yang-Jie Wang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Qiao-Yan Yi
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Fan Du
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
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