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Salvador-Gil D, Herrera RP, Gimeno MC. Catalysis-free synthesis of thiazolidine-thiourea ligands for metal coordination (Au and Ag) and preliminary cytotoxic studies. Dalton Trans 2023. [PMID: 36880202 DOI: 10.1039/d3dt00079f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
The reaction of propargylamines with isothiocyanates results in the selective formation of iminothiazolidines, aminothiazolines or mixed thiazolidine-thiourea compounds under mild conditions. It has been observed that secondary propargylamines lead to the selective formation of cyclic 2-amino-2-thiazoline derivatives, while primary propargylamines form iminothiazoline species. In addition, these cyclic thiazoline derivatives can further react with an excess of isothiocyanate to give rise to thiazolidine-thiourea compounds. These species can also be achieved by reaction of propargylamines with isothiocynates in a molar ratio of 1 : 2. Coordination studies of these heterocyclic species towards silver and gold with different stoichiometries have been carried out and complexes of the type [ML(PPh3)]OTf, [ML2]OTf (M = Ag, Au) or [Au(C6F5)L] have been synthesised. Preliminary studies of the cytotoxic activity in lung cancer cells have also been performed in both ligands and complexes, showing that although the ligands do not exhibit anticancer activity, their coordination to metals, especially silver, greatly enhances the cytotoxic activity.
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Affiliation(s)
- Daniel Salvador-Gil
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
| | - Raquel P Herrera
- Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - M Concepción Gimeno
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
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2
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Zhang Y, Wang J, Yang Z, Zhang Z, He X, Chen G, Huang G, Lu X. Hydrazine Hydrate Accelerates Neocuproine-Copper Complex Generation and Utilization in Alkyne Reduction, a Significant Supplement Method for Catalytic Hydrogenation. J Org Chem 2021; 86:17696-17709. [PMID: 34818024 DOI: 10.1021/acs.joc.1c01803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Diimine (HN═NH) is a strong reducing agent, but the efficiency of diimine oxidized from hydrazine hydrate or its derivatives is still not good enough. Herein, we report an in situ neocuproine-copper complex formation method. The redox potential of this complex enable it can serve as an ideal redox catalyst in the synthesis of diimine by oxidation of hydrazine hydrate, and we successfully applied this technique in the reduction of alkynes. This reduction method displays a broad functional group tolerance and substrate adaptability as well as the advantages of safety and high efficiency. Especially, nitro, benzyl, boc, and sulfur containing alkynes can be reduced to the corresponding alkanes directly, which provides a useful complementary method to traditional catalytic hydrogenation. Besides, we applied this method in the preparation of the Alzheimer's disease drug CT-1812 and studied the mechanism.
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Affiliation(s)
- Yongsheng Zhang
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China.,Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Jincheng Wang
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China.,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China
| | - Zhenjiao Yang
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China.,Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Zeng Zhang
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China.,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China
| | - Xiaoyan He
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China
| | - Guoliang Chen
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Gang Huang
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China
| | - Xiuhong Lu
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China.,School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai 201318, P. R. China
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3
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Synthesis of New Thiourea-Metal Complexes with Promising Anticancer Properties. Molecules 2021; 26:molecules26226891. [PMID: 34833983 PMCID: PMC8619901 DOI: 10.3390/molecules26226891] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 11/25/2022] Open
Abstract
In this work, two thiourea ligands bearing a phosphine group in one arm and in the other a phenyl group (T2) or 3,5-di-CF3 substituted phenyl ring (T1) have been prepared and their coordination to Au and Ag has been studied. A different behavior is observed for gold complexes, a linear geometry with coordination only to the phosphorus atom or an equilibrium between the linear and three-coordinated species is present, whereas for silver complexes the coordination of the ligand as P^S chelate is found. The thiourea ligands and their complexes were explored against different cancer cell lines (HeLa, A549, and Jurkat). The thiourea ligands do not exhibit relevant cytotoxicity in the tested cell lines and the coordination of a metal triggers excellent cytotoxic values in all cases. In general, data showed that gold complexes are more cytotoxic than the silver compounds with T1, in particular the complexes [AuT1(PPh3)]OTf, the bis(thiourea) [Au(T1)2]OTf and the gold-thiolate species [Au(SR)T1]. In contrast, with T2 better results are obtained with silver species [AgT1(PPh3)]OTf and the [Ag(T1)2]OTf. The role played by the ancillary ligand bound to the metal is important since it strongly affects the cytotoxic activity, being the bis(thiourea) complex the most active species. This study demonstrates that metal complexes derived from thiourea can be biologically active and these compounds are promising leads for further development as potential anticancer agents.
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4
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Peng L, Wang D, Zhang D, Zhang Z, Zhou Q, Li H, Yang Y. Synthesis and Characterization of Copper(I) Halide Complexes Prepared with Bipodal Diacylthioureas. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lan‐Xin Peng
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
| | - Dan Wang
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
- College of Energy Soochow Institute for Energy and Materials InnovationS Soochow University Ganjiang Road 333 215006 Suzhou China
| | - De‐Xiang Zhang
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
| | - Zhi‐Jiao Zhang
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
| | - Qi Zhou
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
| | - Hai‐Pu Li
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
- Key laboratory of Hunan Province for Water Environment and Agriculture Product Safety Lushannan Road 932 410083 Changsha China
| | - Ying Yang
- School of Chemistry and Chemical Engineering Central South University Lushannan Road 932 410083 Changsha China
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5
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Henry MC, Senn HM, Sutherland A. Synthesis of Functionalized Indolines and Dihydrobenzofurans by Iron and Copper Catalyzed Aryl C-N and C-O Bond Formation. J Org Chem 2018; 84:346-364. [PMID: 30520304 DOI: 10.1021/acs.joc.8b02888] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A simple and effective one-pot, two-step intramolecular aryl C-N and C-O bond forming process for the preparation of a wide range of benzo-fused heterocyclic scaffolds using iron and copper catalysis is described. Activated aryl rings were subjected to a highly regioselective, iron(III) triflimide-catalyzed iodination, followed by a copper(I)-catalyzed intramolecular N- or O-arylation step leading to indolines, dihydrobenzofurans, and six-membered analogues. The general applicability and functional group tolerance of this method were exemplified by the total synthesis of the neolignan natural product, (+)-obtusafuran. DFT calculations using Fukui functions were also performed, providing a molecular orbital rationale for the highly regioselective arene iodination process.
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Affiliation(s)
- Martyn C Henry
- WestCHEM, School of Chemistry, The Joseph Black Building , University of Glasgow , Glasgow G12 8QQ , United Kingdom
| | - Hans Martin Senn
- WestCHEM, School of Chemistry, The Joseph Black Building , University of Glasgow , Glasgow G12 8QQ , United Kingdom
| | - Andrew Sutherland
- WestCHEM, School of Chemistry, The Joseph Black Building , University of Glasgow , Glasgow G12 8QQ , United Kingdom
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Structural basis of subunit selectivity for competitive NMDA receptor antagonists with preference for GluN2A over GluN2B subunits. Proc Natl Acad Sci U S A 2017; 114:E6942-E6951. [PMID: 28760974 PMCID: PMC5565460 DOI: 10.1073/pnas.1707752114] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
NMDA-type glutamate receptors are ligand-gated ion channels that contribute to excitatory neurotransmission in the central nervous system (CNS). Most NMDA receptors comprise two glycine-binding GluN1 and two glutamate-binding GluN2 subunits (GluN2A-D). We describe highly potent (S)-5-[(R)-2-amino-2-carboxyethyl]-4,5-dihydro-1H-pyrazole-3-carboxylic acid (ACEPC) competitive GluN2 antagonists, of which ST3 has a binding affinity of 52 nM at GluN1/2A and 782 nM at GluN1/2B receptors. This 15-fold preference of ST3 for GluN1/2A over GluN1/2B is improved compared with NVP-AAM077, a widely used GluN2A-selective antagonist, which we show has 11-fold preference for GluN1/2A over GluN1/2B. Crystal structures of the GluN1/2A agonist binding domain (ABD) heterodimer with bound ACEPC antagonists reveal a binding mode in which the ligands occupy a cavity that extends toward the subunit interface between GluN1 and GluN2A ABDs. Mutational analyses show that the GluN2A preference of ST3 is primarily mediated by four nonconserved residues that are not directly contacting the ligand, but positioned within 12 Å of the glutamate binding site. Two of these residues influence the cavity occupied by ST3 in a manner that results in favorable binding to GluN2A, but occludes binding to GluN2B. Thus, we reveal opportunities for the design of subunit-selective competitive NMDA receptor antagonists by identifying a cavity for ligand binding in which variations exist between GluN2A and GluN2B subunits. This structural insight suggests that subunit selectivity of glutamate-site antagonists can be mediated by mechanisms in addition to direct contributions of contact residues to binding affinity.
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7
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Synthesis and biological evaluation of novel N-phenyl ureidobenzenesulfonate derivatives as potential anticancer agents. Part 2. Modulation of the ring B. Eur J Med Chem 2015; 103:563-73. [DOI: 10.1016/j.ejmech.2015.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/11/2015] [Accepted: 09/08/2015] [Indexed: 11/19/2022]
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8
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Gagné-Boulet M, Fortin S, Lacroix J, Lefebvre CA, Côté MF, C.-Gaudreault R. Styryl-N-phenyl-N′-(2-chloroethyl)ureas and styrylphenylimidazolidin-2-ones as new potent microtubule-disrupting agents using combretastatin A-4 as model. Eur J Med Chem 2015; 100:34-43. [DOI: 10.1016/j.ejmech.2015.05.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 05/21/2015] [Accepted: 05/22/2015] [Indexed: 11/30/2022]
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9
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Fortin S, Wei L, Kotra LP, C.-Gaudreault R. Novel Cytocidal Substituted Phenyl 4-(2-Oxoimidazolidin-1-yl) Benzenesulfonates and Benzenesulfonamides with Affinity to the Colchicine-Binding Site: Is the Phenyl 2-Imidazolidinone Moiety a New Haptophore for the Design of New Antimitotics? ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ojmc.2015.51002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Hattori T, Tsubone A, Sawama Y, Monguchi Y, Sajiki H. Systematic evaluation of the palladium-catalyzed hydrogenation under flow conditions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Alam MJ, Ahmad S. Molecular structure, anharmonic vibrational analysis and electronic spectra of o-, m-, p-iodonitrobenzene using DFT calculations. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.12.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Turcotte V, Fortin S, Vevey F, Coulombe Y, Lacroix J, Côté MF, Masson JY, C-Gaudreault R. Synthesis, biological evaluation, and structure-activity relationships of novel substituted N-phenyl ureidobenzenesulfonate derivatives blocking cell cycle progression in S-phase and inducing DNA double-strand breaks. J Med Chem 2012; 55:6194-208. [PMID: 22694057 PMCID: PMC3395254 DOI: 10.1021/jm3006492] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Twenty-eight new substituted N-phenyl ureidobenzenesulfonate (PUB-SO) and 18 N-phenylureidobenzenesulfonamide (PUB-SA) derivatives were prepared. Several PUB-SOs exhibited antiproliferative activity at the micromolar level against the HT-29, M21, and MCF-7 cell lines and blocked cell cycle progression in S-phase similarly to cisplatin. In addition, PUB-SOs induced histone H2AX (γH2AX) phosphorylation, indicating that these molecules induce DNA double-strand breaks. In contrast, PUB-SAs were less active than PUB-SOs and did not block cell cycle progression in S-phase. Finally, PUB-SOs 4 and 46 exhibited potent antitumor activity in HT-1080 fibrosarcoma cells grafted onto chick chorioallantoic membranes, which was similar to cisplatin and combretastatin A-4 and without significant toxicity toward chick embryos. These new compounds are members of a promising new class of anticancer agents.
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Affiliation(s)
- Vanessa Turcotte
- Unité des Biotechnologies et de Bioingénierie, Centre de Recherche, C.H.U.Q., Hôpital Saint-François d'Assise, Québec, QC, G1L 3L5, Canada
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13
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Fortin S, Wei L, Moreau E, Lacroix J, Côté MF, Petitclerc E, Kotra LP, C-Gaudreault R. Design, synthesis, biological evaluation, and structure-activity relationships of substituted phenyl 4-(2-oxoimidazolidin-1-yl)benzenesulfonates as new tubulin inhibitors mimicking combretastatin A-4. J Med Chem 2011; 54:4559-80. [PMID: 21604746 PMCID: PMC3131785 DOI: 10.1021/jm200488a] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Sixty-one phenyl 4-(2-oxoimidazolidin-1-yl)benzenesulfonates (PIB-SOs) and 13 of their tetrahydro-2-oxopyrimidin-1(2H)-yl analogues (PPB-SOs) were prepared and biologically evaluated. The antiproliferative activities of PIB-SOs on 16 cancer cell lines are in the nanomolar range and unaffected in cancer cells resistant to colchicine, paclitaxel, and vinblastine or overexpressing the P-glycoprotein. None of the PPB-SOs exhibit significant antiproliferative activity. PIB-SOs block the cell cycle progression in the G2/M phase and bind to the colchicine-binding site on β-tubulin leading to cytoskeleton disruption and cell death. Chick chorioallantoic membrane tumor assays show that compounds 36, 44, and 45 efficiently block angiogenesis and tumor growth at least at similar levels as combretastatin A-4 (CA-4) and exhibit low to very low toxicity on the chick embryos. PIB-SOs were subjected to CoMFA and CoMSIA analyses to establish quantitative structure–activity relationships.
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Affiliation(s)
- Sébastien Fortin
- Unité des Biotechnologies et de Bioingénierie, Centre de Recherche, CHUQ, Hôpital Saint-François d'Assise, Québec, Québec, Canada.
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14
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Okitsu T, Sato K, Potewar TM, Wada A. Iodocyclization of Hydroxylamine Derivatives Based on the Control of Oxidative Aromatization Leading to 2,5-Dihydroisoxazoles and Isoxazoles. J Org Chem 2011; 76:3438-49. [DOI: 10.1021/jo200407b] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takashi Okitsu
- Department of Organic Chemistry for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Kana Sato
- Department of Organic Chemistry for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Taterao M. Potewar
- Department of Organic Chemistry for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
| | - Akimori Wada
- Department of Organic Chemistry for Life Science, Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan
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15
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Intramolecular cyclization of N-phenyl N'(2-chloroethyl)ureas leads to active N-phenyl-4,5-dihydrooxazol-2-amines alkylating β-tubulin Glu198 and prohibitin Asp40. Biochem Pharmacol 2011; 81:1116-23. [PMID: 21371445 DOI: 10.1016/j.bcp.2011.02.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 02/17/2011] [Accepted: 02/18/2011] [Indexed: 01/23/2023]
Abstract
The cyclization of anticancer drugs into active intermediates has been reported mainly for DNA alkylating molecules including nitrosoureas. We previously defined the original cytotoxic mechanism of anticancerous N-phenyl-N'-(2-chloroethyl)ureas (CEUs) that involves their reactivity towards cellular proteins and not against DNA; two CEU subsets have been shown to alkylate β-tubulin and prohibitin leading to inhibition of cell proliferation by G₂/M or G₁/S cell cycle arrest. In this study, we demonstrated that cyclic derivatives of CEUs, N-phenyl-4,5-dihydrooxazol-2-amines (Oxas) are two- to threefold more active than CEUs and share the same cytotoxic properties in B16F0 melanoma cells. Moreover, the CEU original covalent binding by an ester linkage on β-tubulin Glu198 and prohibitin Asp40 was maintained with Oxas. Surprisingly, we observed that Oxas were spontaneously formed from CEUs in the cell culture medium and were also detected within the cells. Our results suggest that the intramolecular cyclization of CEUs leads to active Oxas that should then be considered as the key intermediates for protein alkylation. These results will be useful for the design of new prodrugs for cancer chemotherapy.
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16
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Fortin S, Bouchon B, Chambon C, Lacroix J, Moreau E, Chezal JM, Degoul F, C-Gaudreault R. Characterization of the covalent binding of N-phenyl-N'-(2-chloroethyl)ureas to {beta}-tubulin: importance of Glu198 in microtubule stability. J Pharmacol Exp Ther 2010; 336:460-7. [PMID: 20978170 DOI: 10.1124/jpet.110.171082] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
N-Phenyl-N'-(2-chloroethyl)ureas (CEUs) are antimicrotubule agents interacting covalently with β-tubulin near the colchicine-binding site (C-BS). Glutamyl 198 residue in β-tubulin (Glu198), which is adjacent to the C-BS behind the two potent nucleophilic residues, Cys239 and Cys354, has been shown to covalently react with 1-(2-chloroethyl)-3-(4-iodophenyl)urea (ICEU). By use of mass spectrometry, we have now identified residues in β-tubulin that have become modified irreversibly by 1-(2-chloroethyl)-3-[3-(5-hydroxypentyl)phenyl]urea (HPCEU), 1-[4-(3-hydroxy-4-methoxystyryl)phenyl]-3-(2-chloroethyl)urea (4ZCombCEU), and N,N'-ethylenebis(iodoacetamide) (EBI). The binding of HPCEU and 4ZCombCEU to β-tubulin resulted in the acylation of Glu198, a protein modification of uncommon occurrence in living cells. Prototypical CEUs then were used as molecular probes to assess, in mouse B16F0 and human MDA-MB-231 cells, the role of Glu198 in microtubule stability. For that purpose, we studied the effect of Glu198 modification by ICEU, HPCEU, and 4ZCombCEU on the acetylation of Lys40 on α-tubulin, a key indicator of microtubule stability. We show that modification of Glu198 by prototypical CEUs correlates with a decrease in Lys40 acetylation, as observed also with other microtubule depolymerizing agents. Therefore, CEU affects the stability and the dynamics of microtubule, likewise a E198G mutation, which is unusual for xenobiotics. We demonstrate for the first time that EBI forms an intramolecular cross-link between Cys239 and Cys354 of β-tubulin in living cells. This work establishes a novel basis for the development of future chemotherapeutic agents and provides a framework for the design of molecules useful for studying the role of Asp and Glu residues in the structure/function and the biological activity of several cellular proteins under physiological conditions.
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Affiliation(s)
- Sébastien Fortin
- Unité des Biotechnologies et de Bioingénierie, Centre de Recherche, Centre Hospitalier Universitaire de Québec, Hôpital Saint-François d'Assise, 10 rue de l'Espinay, Québec, Canada.
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17
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Fortin S, Moreau E, Lacroix J, Côté MF, Petitclerc E, C-Gaudreault R. Synthesis, antiproliferative activity evaluation and structure-activity relationships of novel aromatic urea and amide analogues of N-phenyl-N'-(2-chloroethyl)ureas. Eur J Med Chem 2010; 45:2928-37. [PMID: 20400211 DOI: 10.1016/j.ejmech.2010.03.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 03/15/2010] [Accepted: 03/17/2010] [Indexed: 11/24/2022]
Abstract
Seven subsets of aromatic urea and amide analogues of N-phenyl-N'-(2-chloroethyl)ureas (CEU) have been synthesized by nucleophilic addition of 3-chloropropylisocyanate, 2-chloroacetylisocyanate, ethylisocyanate, 2-chloroacetyl chloride, 3-chloropropanoyl chloride, 4-chlorobutanoyl chloride, and acryloyl chloride, respectively, to selected anilines or benzylamines to afford 3-chloropropylureas (1, CPU), 2-chloroacetylureas (2, CAU), ethylureas (3, EU), 2-chloroacetamides (4, CA), 3-chloropropionamides (5, CPA), 4-chlorobutyramides (6, CBA) and acrylamides (7, Acr). The molecular structure of these compounds has been confirmed by IR, (1)H and (13)C NMR, and MS spectra and their purity also confirmed by HPLC. The CEU analogues were evaluated for their antiproliferative activity against three human tumor cell lines, namely human colon carcinoma HT-29, human skin melanoma M21, and human breast carcinoma MCF-7. CAU (2c to 2g), CA (4a to 4d, 4f and 4 g), CPA (5a) and Acr (7a and 7b) had IC(50) ranging from 1.4 to 25 microM. CAU, CA, CPA and Acr exhibited interesting antiproliferative activity through mechanism(s) of action unrelated to the acylation of glutamic acid at position 198 on beta-tubulin that is characterizing CEU.
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Affiliation(s)
- Sébastien Fortin
- Unité des Biotechnologies et de Bioingénierie, Centre de recherche, C.H.U.Q., Hôpital Saint-François d'Assise, Quebec G1L 3L5, Canada.
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18
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Manjula S, Malleshappa Noolvi N, Vipan Parihar K, Manohara Reddy S, Ramani V, Gadad AK, Singh G, Gopalan Kutty N, Mallikarjuna Rao C. Synthesis and antitumor activity of optically active thiourea and their 2-aminobenzothiazole derivatives: A novel class of anticancer agents. Eur J Med Chem 2009; 44:2923-9. [DOI: 10.1016/j.ejmech.2008.12.002] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 11/07/2008] [Accepted: 12/08/2008] [Indexed: 11/16/2022]
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19
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Fortin S, Wei L, Moreau E, Labrie P, Petitclerc É, Kotra LP, C.-Gaudreault R. Mechanism of action of N-phenyl-N′-(2-chloroethyl)ureas in the colchicine-binding site at the interface between α- and β-tubulin. Bioorg Med Chem 2009; 17:3690-7. [DOI: 10.1016/j.bmc.2009.03.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Revised: 03/24/2009] [Accepted: 03/27/2009] [Indexed: 10/21/2022]
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20
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Abdel-Rahman HM, Morsy MA. Novel benzothiazolyl urea and thiourea derivatives with potential cytotoxic and antimicrobial activities. J Enzyme Inhib Med Chem 2008; 22:57-64. [PMID: 17373548 DOI: 10.1080/14756360600991082] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
A novel series of benzothiazole urea and thiourea derivatives was synthesized and evaluated for its in vitro cytotoxicity against MCF-7 breast cancer cells. The N1-(benzothiazol-2-yl)-N3-morpholinourea 3 displayed the highest cytotoxic activity in this series. A docked pose of 3 was obtained bound to G-quadruplex of human telomere DNA active site using the Molecular Operating Environment (MOE) module. Moreover, the synthesized compounds were screened for their antimicrobial activity against Mycobacterium tuberculosis H37Rv, E. coli, S. aureus and C. albicans. Again, 3 showed the best activity against M. tuberculosis H37Rv while other compounds were equipotent with ampicillin against S. aureus and E. coli.
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Affiliation(s)
- Hamdy M Abdel-Rahman
- Pharmaceutical Medicinal Chemistry Department, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt.
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21
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Girgis AS. Facile synthesis of dithiatetraaza-macrocycles of potential anti-inflammatory activity. Eur J Med Chem 2008; 43:2116-21. [DOI: 10.1016/j.ejmech.2007.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 11/05/2007] [Accepted: 12/06/2007] [Indexed: 11/15/2022]
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22
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Aromatic 2-chloroethyl urea derivatives and bioisosteres. Part 2: Cytocidal activity and effects on the nuclear translocation of thioredoxin-1, and the cell cycle progression. Bioorg Med Chem 2008; 16:7477-88. [DOI: 10.1016/j.bmc.2008.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 05/08/2008] [Accepted: 06/04/2008] [Indexed: 10/22/2022]
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23
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Fortin JS, Côté MF, Lacroix J, Patenaude A, Petitclerc É, C.-Gaudreault R. Cycloalkyl-substituted aryl chloroethylureas inhibiting cell cycle progression in G0/G1 phase and thioredoxin-1 nuclear translocation. Bioorg Med Chem Lett 2008; 18:3526-31. [DOI: 10.1016/j.bmcl.2008.05.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Revised: 05/02/2008] [Accepted: 05/06/2008] [Indexed: 11/29/2022]
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Andaloussi M, Moreau E, Masurier N, Lacroix J, Gaudreault RC, Chezal JM, El Laghdach A, Canitrot D, Debiton E, Teulade JC, Chavignon O. Novel imidazo[1,2-a]naphthyridinic systems (part 1): synthesis, antiproliferative and DNA-intercalating activities. Eur J Med Chem 2008; 43:2505-17. [PMID: 18403058 DOI: 10.1016/j.ejmech.2008.02.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Revised: 01/18/2008] [Accepted: 02/08/2008] [Indexed: 11/26/2022]
Abstract
Novel imidazo[1,2-a]naphthyridinic systems 6a-15a and 6b-15b were obtained from Friedländer's reaction in imidazo[1,2-a]pyridine series. Most of the compounds were evaluated for their antitumor activity in the NCIs in vitro human tumor cell line screening panel. Among them, pentacyclic derivatives 13b and 14a exhibited in vitro activity comparable to anticancer agent such as amsacrine. Their mechanism of cytotoxicity action was unrelated to poisoning or inhibiting abilities against topo1. On the contrary, we highlighted a direct intercalation of the drugs into DNA by electrophoresis on agarose gel.
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Yao L, Du L, Ge M, Ma C, Wang D. Experimental and theoretical study of substituent effects of iodonitrobenzenes. J Phys Chem A 2007; 111:10105-10. [PMID: 17880050 DOI: 10.1021/jp073605r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The electronic structures and substituent effects of o-, m-, and p-iodonitrobenzene have been studied by ultraviolet photoelectron spectroscopy (UPS). The observed bands were interpreted on the basis of empirical arguments and theoretical calculations. The analysis of electronic effects of the donor/acceptor substituent groups is essential for the reliable assignment of the observed photoelectron spectra. The investigation of pi- and n-orbital ionization potentials enabled us to describe the correlation between substituent effects and the relative reactivities of the iodonitrobenzenes. It was found that the energy order of the pi(2) and n(II) parallel orbitals is reversed as a result of the combined influence of the electron-withdrawing nitro group and the electron-donating iodine atom. Distinct changes of the pi and n bands occur in o-iodonitrobenzene. This characteristic depends on the conjugation between the pi orbitals of the benzene ring and the nitro group and the interaction of in-plane lone pairs of iodine and one of the oxygen atoms of the nitro group in the adjacent position. This might contribute to the high reactivity of o-iodonitrobenzene in a number of reactions.
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Affiliation(s)
- Li Yao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, PR China
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26
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Fortin JS, Lacroix J, Desjardins M, Patenaude A, Petitclerc E, C-Gaudreault R. Alkylation potency and protein specificity of aromatic urea derivatives and bioisosteres as potential irreversible antagonists of the colchicine-binding site. Bioorg Med Chem 2007; 15:4456-69. [PMID: 17498960 DOI: 10.1016/j.bmc.2007.04.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2007] [Revised: 04/04/2007] [Accepted: 04/15/2007] [Indexed: 11/21/2022]
Abstract
A number of N-phenyl-N'-(2-chloroethyl)ureas (CEUs) have been shown to be potent antimitotics through their covalent binding to the colchicine-binding site on intracellular beta-tubulin. The present communication aimed to evaluate the role of the electrophilic 2-chloroethyl amino moiety of CEU on cell growth inhibition and the specificity of the drugs as irreversible antagonists of the colchicine-binding site. To that end, several N-phenyl-N'-(2-ethyl)urea (EU), N-phenyl-N'-(2-chloroethyl)urea (CEU), N-aryl amino-2-oxazoline (OXA), and N-phenyl-N'-(2-chloroacetyl)urea (CAU) derivatives were prepared and tested for their antiproliferative activity, their effect on the cell cycle, and their irreversible binding to beta-tubulin. EU derivatives were devoid of antiproliferative activity. CEUs (2h-2i, 2k, 2l, OXA 3e, 3h, 3i, 3k, 3l, tBCEU, and ICEU), OXA (3h, 3i, 3k, 3l, tBOXA, and IOXA), and CAU (4a-4m, tBCAU, and ICAU) had GI(50) between 1.7 and 10microM on three tumor cell lines. Cytotoxic CEU and OXA arrested the cell cycle in G(2)/M phase, while the corresponding CAU were not phase specific. Finally, Western blot analysis clearly showed that only CEUs 2h, 2k, 2l, tBCEU, ICEU and OXA 3h, 3i, 3k, 3l, tBOXA ,and IOXA were able to bind irreversibly to the colchicine-binding site. Our results suggest that increasing the potency of the electrophilic moiety of the aromatic ureas enhances their antiproliferative activity but decreases significantly their capacity to covalently bind to the colchicine-binding site.
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Affiliation(s)
- Jessica S Fortin
- Unité des Biotechnologies et de Bioingénierie, CHUQ, Hôpital Saint-François d'Assise, Québec, Que., Canada G1L 3L5
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27
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Fortin S, Moreau E, Lacroix J, Teulade JC, Patenaude A, C-Gaudreault R. N-Phenyl-N′-(2-chloroethyl)urea analogues of combretastatin A-4: Is the N-phenyl-N′-(2-chloroethyl)urea pharmacophore mimicking the trimethoxy phenyl moiety? Bioorg Med Chem Lett 2007; 17:2000-4. [PMID: 17291753 DOI: 10.1016/j.bmcl.2007.01.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2006] [Revised: 01/08/2007] [Accepted: 01/08/2007] [Indexed: 10/23/2022]
Abstract
A series of novel N-phenyl-N'-(2-chloroethyl)urea derivatives potentially mimicking the structure of combretastatin A-4 were synthesized and tested for their cell growth inhibition and their binding to the colchicine-binding site of beta-tubulin. Compounds 2a, 3a, and 3b were found to inhibit cell growth at the micromolar level on four human tumor cell lines. Flow cytometric analysis indicates that the new compounds act as antimitotics and arrest the cell cycle in G(2)/M phase. Covalent binding of 2a, 3a, and 3b to the colchicine-binding site of beta-tubulin was confirmed also using SDS-PAGE and competition assays.
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Affiliation(s)
- Sébastien Fortin
- Unité des Biotechnologies et de Bioingénierie, Centre de recherche, C.H.U.Q., Hôpital Saint-François d'Assise, Université Laval, Que., Canada G1L 3L5
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Patenaude A, Deschesnes RG, Rousseau JLC, Petitclerc E, Lacroix J, Côté MF, C-Gaudreault R. New Soft Alkylating Agents with Enhanced Cytotoxicity against Cancer Cells Resistant to Chemotherapeutics and Hypoxia. Cancer Res 2007; 67:2306-16. [PMID: 17332362 DOI: 10.1158/0008-5472.can-06-3824] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Chloroethylureas (CEU) are soft alkylating agents that covalently bind to beta-tubulin (betaTAC) and affect microtubule polymerization dynamics. Herein, we report the identification of a CEU subset and its corresponding oxazolines, which induce cell growth inhibition, apoptosis, and microtubule disruption without alkylating beta-tubulin (N-betaTAC). Both betaTAC and N-betaTAC trigger the collapse of mitochondrial potential (DeltaPsi(m)) and modulate reactive oxygen species levels, following activation of intrinsic caspase-8 and caspase-9. Experiments using human fibrosarcoma HT1080 respiratory-deficient cells (rho(0)) and uncoupler of the mitochondrial respiratory chain (MRC) showed that betaTAC and N-betaTAC impaired the MRC. rho(0) cells displayed an increased sensitivity toward N-betaTAC as compared with rho(+) cells but, in contrast, were resistant to betaTAC or classic chemotherapeutics, such as paclitaxel. Oxazoline-195 (OXA-195), an N-betaTAC derivative, triggered massive swelling of isolated mitochondria. This effect was insensitive to cyclosporin A and to Bcl-2 addition. In contrast, adenine nucleotide translocator (ANT) antagonists, bongkrekic acid or atractyloside, diminished swelling induced by OXA-195. The antiproliferative activities of the N-betaTACs CEU-025 and OXA-152 were markedly decreased in the presence of atractyloside. Conversely, pretreatment with cyclosporin A enhanced growth inhibition induced by betaTAC and N-betaTAC. One of the proteins alkylated by N-betaTAC was identified as the voltage-dependent anion channel isoform-1, an ANT partner. Our results suggest that betaTAC and N-betaTAC, despite their common ability to affect the microtubule network, trigger different cytotoxic mechanisms in cancer cells. The role of mitochondria in these mechanisms and the potential of N-betaTAC as a new therapeutic approach for targeting hypoxia-resistant cells are discussed.
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Affiliation(s)
- Alexandre Patenaude
- Unité de Biotechnologie et de Bioingénierie, CHUQ, Hôpital Saint-François d'Assise, Université Laval, Québec, Canada.
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Deschesnes RG, Patenaude A, Rousseau JLC, Fortin JS, Ricard C, Côté MF, Huot J, C-Gaudreault R, Petitclerc E. Microtubule-Destabilizing Agents Induce Focal Adhesion Structure Disorganization and Anoikis in Cancer Cells. J Pharmacol Exp Ther 2006; 320:853-64. [PMID: 17099073 DOI: 10.1124/jpet.106.110957] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Microtubule disruption provokes cytoskeleton and cell adhesion changes whose importance for apoptosis induction remains unclear. The present study focuses on the functional and the molecular adhesion kinetics that are induced by microtubule disruption-mediated apoptosis. We showed that antimicrotubules induce a biphasic sequence of adhesion response that precedes the onset of apoptosis and focal adhesion kinase hydrolysis. Antimicrotubules first induced an increase of the cellular adhesion paralleled by the raise of focal adhesion sites and actin contractility, which was followed by a sharp decrease of cell adhesion and disorganization of focal adhesion and actin stress fibers. The latter sequence of events ends by cell rounding, detachment from the extracellular matrix, and cell death. Microtubule-disrupting agents induced a sustained paxillin phosphorylation, before the activation of apoptosis, that requires the prior activation of extracellular signal-regulated kinase and p38 but not c-Jun NH(2)-terminal kinase. Interestingly, integrin-linked kinase overexpression rescued the antimicrotubule-mediated loss of cell viability. Altogether, these results propound that antimicrotubule agents induce anoikis through the loss of focal adhesion structure integrity.
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Affiliation(s)
- Réna G Deschesnes
- Centre de Recherche, Unité des Biotechnologies et de Bioingénierie, Centre Hospitalier Universitaire de Québec, Hôpital Saint-François d'Assise, 10 rue de l'Espinay, Québec, Québec, Canada G1L 3L5
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Hwang DJ, Yang J, Xu H, Rakov IM, Mohler ML, Dalton JT, Miller DD. Arylisothiocyanato selective androgen receptor modulators (SARMs) for prostate cancer. Bioorg Med Chem 2006; 14:6525-38. [PMID: 16828557 PMCID: PMC2234576 DOI: 10.1016/j.bmc.2006.06.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2006] [Revised: 06/06/2006] [Accepted: 06/08/2006] [Indexed: 01/29/2023]
Abstract
A new series of androgen receptor targeted agents (ARTA) was prepared and tested in androgen-dependent and -independent prostate cancer cell lines. These agents were bicalutamide analogs with isothiocyanato substituted B-rings. Also, the linker sulfone of R-bicalutamide was maintained or replaced with several alternative linkages including ether, amine, N-methylamine, thioether, and methylene (in this case the product was a racemic mixture) functional groups at the X-position. To expand the structure-activity relationship (SAR) of these arylisothiocyanato AR ligands, B-ring halogenated arylisothiocyanato ligands were also prepared and tested. The arylisothiocyanato AR ligands showed strong binding affinities to AR ranging from 0.6 to 54 nM. Among them, thioether and ether linkages demonstrated high binding affinities (0.6 and 4.6 nM, respectively) and selective cell growth inhibition (approximately 3- to 6-fold) for LNCaP, an androgen-dependent prostate cancer cell line, when compared to the androgen independent prostate cell lines (DU145, PC-3, and PPC-1) and a bladder cell line (TSU-Pr1). However, the ligands were inactive (IC50>100 mM) in a normal monkey kidney cell line (CV-1) that was used as the control for non-specific toxicity.
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Affiliation(s)
- Dong Jin Hwang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Jun Yang
- Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Huiping Xu
- Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Igor M. Rakov
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Michael L. Mohler
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - James T. Dalton
- Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Duane D. Miller
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
- Corresponding author. Tel.: +1 901 448 6026; fax: +1 901 448 3446; e-mail:
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