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Bondžić AM, Žakula JJ, Korićanac LB, Keta OD, Janjić GV, Đorđević IS, Rajković SU. Cytotoxic activity and influence on acetylcholinesterase of series dinuclear platinum(II) complexes with aromatic nitrogen-containing heterocyclic bridging ligands: Insights in the mechanisms of action. Chem Biol Interact 2021; 351:109708. [PMID: 34666020 DOI: 10.1016/j.cbi.2021.109708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/30/2021] [Accepted: 10/13/2021] [Indexed: 11/27/2022]
Abstract
Herein, the stability, lipophilicity, in vitro cytotoxicity, and influence on acetylcholinesterase of five dinuclear platinum(II) complexes with the general formula [{Pt(en)Cl}2(μ-L)]2+ (L is a different aromatic nitrogen-containing heterocyclic bridging ligands pyrazine (pz, Pt1), pyridazine (pydz, Pt2), quinoxaline (qx, Pt3), phthalazine (phtz, Pt4) and quinazoline (qz, Pt5), while en is bidentate coordinated ethylenediamine) were evaluated. The most active analyzed platinum complexes induced time-dependent growth inhibition of A375, HeLa, PANC-1, and MRC-5 cells. The best efficiency was achieved on HeLa and PANC-1 cells for Pt1, Pt2, and Pt3 at the highest concentration, while Pt1 was significantly more potent than cisplatin at a lower concentration. Additionally, a lower effect on normal cells was observed compared to cisplatin, which may indicate potentially fewer side effects of these complexes. Selected complexes induce reactive oxygen species and apoptosis on tumor cell lines. The most potent reversible acetylcholinesterase (AChE) inhibitors were Pt2, Pt4, and Pt5. Pt1 showed similar inhibitory potential toward AChE as cisplatin, but a different type of inhibition, which could contribute to lower neurotoxicity. Docking studies revealed that Pt2 and Pt4 were bound to the active gorge above the catalytic triad. In contrast, the other complexes were bound to the edge of the active gorge without impeding the approach to the catalytic triad. According to this, Pt1 represents a promising compound with potent anticancer properties, high selectivity, and low neurotoxicity.
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Affiliation(s)
- Aleksandra M Bondžić
- Vinča Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia.
| | - Jelena J Žakula
- Vinča Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Lela B Korićanac
- Vinča Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Otilija D Keta
- Vinča Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Goran V Janjić
- Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | - Ivana S Đorđević
- Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | - Snežana U Rajković
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, P.O. Box 60, 34000 Kragujevac, Serbia
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Kamal MA, Al-Jafari AA. Dual substrate model for novel approach towards a kinetic study of acetylcholinesterase inhibition by diazinon. JOURNAL OF ENZYME INHIBITION 2003; 15:201-13. [PMID: 10938544 DOI: 10.1080/14756360009030351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Limited reports as compared to other insecticides appear in the literature for acetylcholinesterase (AChE) inhibition by diazinon. In the current study, new kinetic parameters of AChE inhibition by diazinon have been investigated. The assay was done with bovine retinal AChE using two different substrate (ASCh) concentrations in the absence and presence of diazinon (0.08-1.28 mM). The optical density was monitored up to 25 min (reaction time) for the assay. New kinetic parameters k'(oms), K'(sms), k(oms), K(sms), K'(asms) and K(asms) ) were calculated from these experimental data.
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Affiliation(s)
- M A Kamal
- Department of Biochemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.
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