Iuliana Besleaga, Renáta Raptová, Alexandru-Constantin Stoica, Miljan N. M. Milunovic, Michal Zalibera, Ruoli Bai, Nóra Igaz, Jóhannes Reynisson, Mónika Kiricsi, Éva A. Enyedy, Peter Rapta, Ernest Hamel and Vladimir B. Arion
{"title":"Are the metal identity and stoichiometry of metal complexes important for colchicine site binding and inhibition of tubulin polymerization?†","authors":"Iuliana Besleaga, Renáta Raptová, Alexandru-Constantin Stoica, Miljan N. M. Milunovic, Michal Zalibera, Ruoli Bai, Nóra Igaz, Jóhannes Reynisson, Mónika Kiricsi, Éva A. Enyedy, Peter Rapta, Ernest Hamel and Vladimir B. Arion","doi":"10.1039/D4DT01469C","DOIUrl":null,"url":null,"abstract":"<p >Quite recently we discovered that copper(<small>II</small>) complexes with isomeric morpholine-thiosemicarbazone hybrid ligands show good cytotoxicity in cancer cells and that the molecular target responsible for this activity might be tubulin. In order to obtain better lead drug candidates, we opted to exploit the power of coordination chemistry to (i) assemble structures with globular shape to better fit the colchicine pocket and (ii) vary the metal ion. We report the synthesis and full characterization of bis-ligand cobalt(<small>III</small>) and iron(<small>III</small>) complexes with 6-morpholinomethyl-2-formylpyridine 4<em>N</em>-(4-hydroxy-3,5-dimethylphenyl)-3-thiosemicarbazone (<strong>HL<small><sup>1</sup></small></strong>), 6-morpholinomethyl-2-acetylpyridine 4<em>N</em>-(4-hydroxy-3,5-dimethylphenyl)-3-thiosemicarbazone (<strong>HL<small><sup>2</sup></small></strong>), and 6-morpholinomethyl-2-formylpyridine 4<em>N</em>-phenyl-3-thiosemicarbazone (<strong>HL<small><sup>3</sup></small></strong>), and <em>mono</em>-ligand nickel(<small>II</small>), zinc(<small>II</small>) and palladium(<small>II</small>) complexes with <strong>HL<small><sup>1</sup></small></strong>, namely [Co<small><sup>III</sup></small>(HL<small><sup>1</sup></small>)(L<small><sup>1</sup></small>)](NO<small><sub>3</sub></small>)<small><sub>2</sub></small> (<strong>1</strong>), [Co<small><sup>III</sup></small>(HL<small><sup>2</sup></small>)(L<small><sup>2</sup></small>)](NO<small><sub>3</sub></small>)<small><sub>2</sub></small> (<strong>2</strong>), [Co<small><sup>III</sup></small>(HL<small><sup>3</sup></small>)(L<small><sup>3</sup></small>)](NO<small><sub>3</sub></small>)<small><sub>2</sub></small> (<strong>3</strong>), [Fe<small><sup>III</sup></small>(L<small><sup>2</sup></small>)<small><sub>2</sub></small>]NO<small><sub>3</sub></small> (<strong>4</strong>), [Fe<small><sup>III</sup></small>(HL<small><sup>3</sup></small>)(L<small><sup>3</sup></small>)](NO<small><sub>3</sub></small>)<small><sub>2</sub></small> (<strong>5</strong>), [Ni<small><sup>II</sup></small>(L<small><sup>1</sup></small>)]Cl (<strong>6</strong>), [Zn(L<small><sup>1</sup></small>)Cl] (<strong>7</strong>) and [Pd<small><sup>II</sup></small>(HL<small><sup>1</sup></small>)Cl]Cl (<strong>8</strong>). We discuss the effect of the metal identity and metal complex stoichiometry on <em>in vitro</em> cytotoxicity and antitubulin activity. The high antiproliferative activity of complex <strong>4</strong> correlated well with inhibition of tubulin polymerization. Insights into the mechanism of antiproliferative activity were supported by experimental results and molecular docking calculations.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/dt/d4dt01469c?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dalton Transactions","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/dt/d4dt01469c","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Quite recently we discovered that copper(II) complexes with isomeric morpholine-thiosemicarbazone hybrid ligands show good cytotoxicity in cancer cells and that the molecular target responsible for this activity might be tubulin. In order to obtain better lead drug candidates, we opted to exploit the power of coordination chemistry to (i) assemble structures with globular shape to better fit the colchicine pocket and (ii) vary the metal ion. We report the synthesis and full characterization of bis-ligand cobalt(III) and iron(III) complexes with 6-morpholinomethyl-2-formylpyridine 4N-(4-hydroxy-3,5-dimethylphenyl)-3-thiosemicarbazone (HL1), 6-morpholinomethyl-2-acetylpyridine 4N-(4-hydroxy-3,5-dimethylphenyl)-3-thiosemicarbazone (HL2), and 6-morpholinomethyl-2-formylpyridine 4N-phenyl-3-thiosemicarbazone (HL3), and mono-ligand nickel(II), zinc(II) and palladium(II) complexes with HL1, namely [CoIII(HL1)(L1)](NO3)2 (1), [CoIII(HL2)(L2)](NO3)2 (2), [CoIII(HL3)(L3)](NO3)2 (3), [FeIII(L2)2]NO3 (4), [FeIII(HL3)(L3)](NO3)2 (5), [NiII(L1)]Cl (6), [Zn(L1)Cl] (7) and [PdII(HL1)Cl]Cl (8). We discuss the effect of the metal identity and metal complex stoichiometry on in vitro cytotoxicity and antitubulin activity. The high antiproliferative activity of complex 4 correlated well with inhibition of tubulin polymerization. Insights into the mechanism of antiproliferative activity were supported by experimental results and molecular docking calculations.
期刊介绍:
Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.