1
|
Bär SI, Schleser SW, Oberhuber N, Herrmann A, Schlotte L, Weber SE, Schobert R. Trans-[bis(benzimidazol-2-ylidene)dichlorido]platinum(II) complexes with peculiar modes of action and activity against cisplatin-resistant cancer cells. J Inorg Biochem 2023; 238:112028. [PMID: 36274479 DOI: 10.1016/j.jinorgbio.2022.112028] [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: 08/15/2022] [Revised: 09/27/2022] [Accepted: 10/11/2022] [Indexed: 11/05/2022]
Abstract
Three series of cis- and trans-[bis(benzimidazol-2-ylidene)dichlorido]platinum(II) and cis-[(benzimidazol-2-ylidene)(DMSO)dichlorido]platinum(II) complexes were synthesised and screened for cytotoxicity against six human cancer cell lines. Depending on their N-alkyl and 5-alkoxycarbonyl substituents, two-digit nanomolar to single-digit micromolar IC50 values against cancer cell lines intrinsically resistant to or ill-responding to cisplatin were reached by both cis- and trans-configured complexes. The stability of the complexes under aqueous biotest conditions was shown via 1H and 195Pt NMR monitoring to be dependent on their configuration and their N-substituents. Localisation studies employing click reactions with 1-alkyne- or cyclopropene-tagged derivatives revealed that the cis-complexes accumulated in the cell nuclei and the trans-complexes in the mitochondria. While the most active cis-complexes showed modes of action akin to those of cisplatin, the most active trans-complexes differed from cisplatin by much lower rates of cellular uptake and ROS production, and by their non-interaction with the cell cycle and the DNA of cancer cells. Thus, we identified structural key elements for the synthesis of optimised trans-configured NHC platinum(II) complexes with high activity also against cisplatin-refractory cancer cells.
Collapse
Affiliation(s)
- Sofia I Bär
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Sebastian W Schleser
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Natalie Oberhuber
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Alexander Herrmann
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Luca Schlotte
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Stefanie E Weber
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany
| | - Rainer Schobert
- Organic Chemistry Laboratory, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany.
| |
Collapse
|
2
|
Adams M, Sullivan MP, Tong KKH, Goldstone DC, Hanif M, Jamieson SMF, Hartinger CG. Mustards-Derived Terpyridine-Platinum Complexes as Anticancer Agents: DNA Alkylation vs Coordination. Inorg Chem 2021; 60:2414-2424. [PMID: 33497565 DOI: 10.1021/acs.inorgchem.0c03317] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of bifunctional platinum complexes with the ability to interact with DNA via different binding modes is of interest in anticancer metallodrug research. Therefore, we report platinum(II) terpyridine complexes to target DNA by coordination and/or through a tethered alkylating moiety. The platinum complexes were evaluated for their in vitro antiproliferative properties against the human cancer cell lines HCT116 (colorectal), SW480 (colon), NCI-H460 (non-small cell lung), and SiHa (cervix) and generally exhibited potent antiproliferative activity although lower than their respective terpyridine ligands. 1H NMR spectroscopy and/or ESI-MS studies on the aqueous stability and reactivity with various small biomolecules, acting as protein and DNA model compounds, were used to establish potential modes of action for these complexes. These investigations indicated rapid binding of complex PtL3 to the biomolecules through coordination to the Pt center, while PtL4 in addition alkylated 9-ethylguanine. PtL3 was investigated for its reactivity to the model protein hen egg white lysozyme (HEWL) by protein crystallography which allowed identification of the Nδ1 atom of His15 as the binding site.
Collapse
Affiliation(s)
- Muneebah Adams
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Matthew P Sullivan
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.,School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Kelvin K H Tong
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - David C Goldstone
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Muhammad Hanif
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Stephen M F Jamieson
- Auckland Cancer Society Research Centre, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Christian G Hartinger
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| |
Collapse
|
3
|
|
4
|
Study on the interaction of three structurally related cationic Pt(II) complexes with human serum albumin: importance of binding affinity and denaturing properties. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0773-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
5
|
Shaili E, Fernández-Giménez M, Rodríguez-Astor S, Gandioso A, Sandín L, García-Vélez C, Massaguer A, Clarkson GJ, Woods JA, Sadler PJ, Marchán V. A Photoactivatable Platinum(IV) Anticancer Complex Conjugated to the RNA Ligand Guanidinoneomycin. Chemistry 2015; 21:18474-86. [PMID: 26662220 DOI: 10.1002/chem.201502373] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Indexed: 11/07/2022]
Abstract
A photoactivatable platinum(IV) complex, trans,trans,trans-[Pt(N3 )2 (OH)(succ)(py)2 ] (succ=succinylate, py=pyridine), has been conjugated to guanidinoneomycin to study the effect of this guanidinum-rich compound on the photoactivation, intracellular accumulation and phototoxicity of the pro-drug. Surprisingly, trifluoroacetic acid treatment causes the replacement of an azido ligand and the axial hydroxide ligand by trifluoroacetate, as shown by NMR spectroscopy, MS and X-ray crystallography. Photoactivation of the platinum-guanidinoneomycin conjugate in the presence of 5'-guanosine monophosphate (5'-GMP) led to the formation of trans-[Pt(N3 )(py)2 (5'-GMP)](+) , as does the parent platinum(IV) complex. Binding of the platinum(II) photoproduct {PtN3 (py)2 }(+) to guanine nucleobases in a short single-stranded oligonucleotide was also observed. Finally, cellular uptake studies showed that guanidinoneomycin conjugation improved the intracellular accumulation of the platinum(IV) pro-drug in two cancer cell lines, particularly in SK-MEL-28 cells. Notably, the higher phototoxicity of the conjugate in SK-MEL-28 cells than in DU-145 cells suggests a degree of selectivity towards the malignant melanoma cell line.
Collapse
Affiliation(s)
- Evyenia Shaili
- Department of Chemistry, University of Warwick, Warwick, CV4 7AL, Coventry (UK)
| | - Marta Fernández-Giménez
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona (Spain)
| | - Savina Rodríguez-Astor
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona (Spain)
| | - Albert Gandioso
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona (Spain)
| | - Lluís Sandín
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona (Spain)
| | - Carlos García-Vélez
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona (Spain)
| | - Anna Massaguer
- Departament de Biologia, Universitat de Girona, Campus Montilivi, 17071, Girona (Spain)
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick, Warwick, CV4 7AL, Coventry (UK)
| | - Julie A Woods
- Photobiology Unit, Department of Dermatology, Ninewells Hospital, Dundee, DD1 9SY (UK)
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Warwick, CV4 7AL, Coventry (UK).
| | - Vicente Marchán
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, 08028, Barcelona (Spain).
| |
Collapse
|
6
|
Anticancer activity and DNA-binding properties of novel cationic Pt(II) complexes. Int J Biol Macromol 2014; 66:86-96. [DOI: 10.1016/j.ijbiomac.2014.01.057] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/21/2014] [Accepted: 01/24/2014] [Indexed: 11/17/2022]
|
7
|
Astakhova IK, Hansen LH, Vester B, Wengel J. Peptide-LNA oligonucleotide conjugates. Org Biomol Chem 2013; 11:4240-9. [PMID: 23681061 DOI: 10.1039/c3ob40786a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Although peptide-oligonucleotide conjugates (POCs) are well-known for nucleic acids delivery and therapy, reports on internal attachment of peptides to oligonucleotides are limited in number. To develop a convenient route for preparation of internally labeled POCs with improved biomedical properties, peptides were introduced into oligonucleotides via a 2'-alkyne-2'-amino-LNA scaffold. Derivatives of methionine- and leucine-enkephalins were chosen as model peptides of mixed amino acid content, which were singly and doubly incorporated into LNA/DNA strands using highly efficient copper(i)-catalyzed azide-alkyne cycloaddition (CuAAC) "click" chemistry. DNA/RNA target binding affinity and selectivity of the resulting POCs were improved in comparison to LNA/DNA mixmers and unmodified DNA controls. This clearly demonstrates that internal attachment of peptides to oligonucleotides can significantly improve biomolecular recognition by synthetic nucleic acid analogues. Circular dichroism (CD) measurements showed no distortion of the duplex structure by the incorporated peptide chains while studies in human serum indicated superior stability of the POCs compared to LNA/DNA mixmers and unmodified DNA references. Molecular modeling suggests strong interactions between positively charged regions of the peptides and the negative oligonucleotide backbones which leads to clamping of the peptides in a fixed orientation along the duplexes.
Collapse
Affiliation(s)
- I Kira Astakhova
- Nucleic Acid Center and the Biomolecular Nanoscale Engineering Center, Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
| | | | | | | |
Collapse
|
8
|
Barragán F, Carrion-Salip D, Gómez-Pinto I, González-Cantó A, Sadler PJ, de Llorens R, Moreno V, González C, Massaguer A, Marchán V. Somatostatin subtype-2 receptor-targeted metal-based anticancer complexes. Bioconjug Chem 2012; 23:1838-55. [PMID: 22871231 DOI: 10.1021/bc300173h] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Conjugates of a dicarba analogue of octreotide, a potent somatostatin agonist whose receptors are overexpressed on tumor cells, with [PtCl(2)(dap)] (dap = 1-(carboxylic acid)-1,2-diaminoethane) (3), [(η(6)-bip)Os(4-CO(2)-pico)Cl] (bip = biphenyl, pico = picolinate) (4), [(η(6)-p-cym)RuCl(dap)](+) (p-cym = p-cymene) (5), and [(η(6)-p-cym)RuCl(imidazole-CO(2)H)(PPh(3))](+) (6), were synthesized by using a solid-phase approach. Conjugates 3-5 readily underwent hydrolysis and DNA binding, whereas conjugate 6 was inert to ligand substitution. NMR spectroscopy and molecular dynamics calculations showed that conjugate formation does not perturb the overall peptide structure. Only 6 exhibited antiproliferative activity in human tumor cells (IC(50) = 63 ± 2 μM in MCF-7 cells and IC(50) = 26 ± 3 μM in DU-145 cells) with active participation of somatostatin receptors in cellular uptake. Similar cytotoxic activity was found in a normal cell line (IC(50) = 45 ± 2.6 μM in CHO cells), which can be attributed to a similar level of expression of somatostatin subtype-2 receptor. These studies provide new insights into the effect of receptor-binding peptide conjugation on the activity of metal-based anticancer drugs, and demonstrate the potential of such hybrid compounds to target tumor cells specifically.
Collapse
Affiliation(s)
- Flavia Barragán
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Barragán F, López-Senín P, Salassa L, Betanzos-Lara S, Habtemariam A, Moreno V, Sadler PJ, Marchán V. Photocontrolled DNA binding of a receptor-targeted organometallic ruthenium(II) complex. J Am Chem Soc 2011; 133:14098-108. [PMID: 21797210 DOI: 10.1021/ja205235m] [Citation(s) in RCA: 156] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A photoactivated ruthenium(II) arene complex has been conjugated to two receptor-binding peptides, a dicarba analogue of octreotide and the Arg-Gly-Asp (RGD) tripeptide. These peptides can act as "tumor-targeting devices" since their receptors are overexpressed on the membranes of tumor cells. Both ruthenium-peptide conjugates are stable in aqueous solution in the dark, but upon irradiation with visible light, the pyridyl-derivatized peptides were selectively photodissociated from the ruthenium complex, as inferred by UV-vis and NMR spectroscopy. Importantly, the reactive aqua species generated from the conjugates, [(η(6)-p-cym)Ru(bpm)(H(2)O)](2+), reacted with the model DNA nucleobase 9-ethylguanine as well as with guanines of two DNA sequences, (5')dCATGGCT and (5')dAGCCATG. Interestingly, when irradiation was performed in the presence of the oligonucleotides, a new ruthenium adduct involving both guanines was formed as a consequence of the photodriven loss of p-cymene from the two monofunctional adducts. The release of the arene ligand and the formation of a ruthenated product with a multidentate binding mode might have important implications for the biological activity of such photoactivated ruthenium(II) arene complexes. Finally, photoreactions with the peptide-oligonucleotide hybrid, Phac-His-Gly-Met-linker-p(5')dCATGGCT, also led to arene release and to guanine adducts, including a GG chelate. The lack of interaction with the peptide fragment confirms the preference of such organometallic ruthenium(II) complexes for guanine over other potential biological ligands, such as histidine or methionine amino acids.
Collapse
Affiliation(s)
- Flavia Barragán
- Departament de Química Orgànica and IBUB, Universitat de Barcelona, Spain
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Li C, Huang R, Ding Y, Sletten E, Arnesano F, Losacco M, Natile G, Liu Y. Effect of thioethers on DNA platination by trans-platinum complexes. Inorg Chem 2011; 50:8168-76. [PMID: 21812429 DOI: 10.1021/ic200637t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Increasing evidence indicates that sulfur-containing molecules can play important roles in the activity of platinum anticancer drugs. Although nuclear DNA is retained to be the ultimate target, these platinum compounds can readily react with a variety of other substrates containing a soft donor atom, such as proteins, peptides, and low molecular weight biomolecules, before reaching DNA. In a recent study it was demonstrated that the DNA platination rate of a trans-geometry antitumor drug was dramatically enhanced by methionine binding, thus suggesting that the thioether could serve as a catalyst for DNA platination. In this work we performed detailed studies on the reactions of a widely investigated and very promising trans-platinum complex having two iminoethers and two chlorido ligands, trans-EE, with methionine (Met) and guanosine 5'-monophosphate (GMP). The results show that in the reaction of trans-EE with methionine the bisadduct is the dominant species in the early stage of the reaction. The reaction is also influenced by chloride concentration: at low NaCl the bis-methionine adduct is formed in preference, whereas the monoadduct is favored at high NaCl concentration. Not only the monomethionine complex, trans-PtCl(E-iminoether)(2)(AcMet), but also the bis-methionine adduct, trans-Pt(E-iminoether)(2)(AcMet)(2), which has already lost both leaving chlorides, can react with GMP to form the ternary platinum complex trans-Pt(E-iminoether)(2)(AcMet)(GMP). The latter reaction discloses the possibility of direct coordination to DNA of a platinum-protein adduct, in which the two carrier ligands remain intact; this is not the case of cis-oriented platinum complexes, like cisplatin, for which formation of a ternary complex is usually accompanied by loss of at least one carrier ligand. Interestingly, isomerization from S to N coordination of one methionine takes place in the bis-methionine complex at neutral pH, while the monoadduct appears to be stable. The shift from S to N coordination of one methionine in the trans-bis-methionine adduct can easily account for the obtainment of the cis isomer in the bis-chelated Pt(Met-S,N)(2) end product.
Collapse
Affiliation(s)
- Chan Li
- Department of Chemistry, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Zhang D, Ren X, Zhou L. Theoretical analysis of trans-[PtCl2(NH3)(thiazole)] and trans-[PtCl2(thiazole)2] binding to biological targets — Factors influence binding kinetics and adduct stability. CAN J CHEM 2010. [DOI: 10.1139/v10-139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Full reaction energy profiles for trans-[PtCl2(NH3)(thiazole)] and trans-[PtCl2(thiazole)2] binding to sulfur- and nitrogen-containing biorelevant ligands were constructed by the density functional theory (DFT) method. Calculated results demonstrate that trans-platinum complexes can interact with biological targets, affording cis and trans products via very similar transition states. For different substituents, sulfur-containing ligands constitute kinetically preferred targets for platination, whereas the platination of nitrogen-containing ligands is more favorable thermodynamically. This is consistent with previous experimental studies. Calculated results also suggest that the trans effect, the influence of the ligand, the size of the ligand, and hydrogen bonding play important roles in binding kinetics and stabilizing adducts.
Collapse
Affiliation(s)
- Dongdong Zhang
- Department of Chemistry, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Xiuli Ren
- Department of Chemistry, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| | - Lixin Zhou
- Department of Chemistry, Jinan University, Guangzhou, Guangdong 510632, P.R. China
| |
Collapse
|
12
|
Zhu J, Lin M, Fan D, Wu Z, Chen Y, Zhang J, Lu Y, Guo Z. The role of bridging ligands in determining DNA-binding ability and cross-linking patterns of dinuclear platinum(II) antitumour complexes. Dalton Trans 2009:10889-95. [PMID: 20023919 DOI: 10.1039/b913236h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The DNA binding ability and binding mode of platinum complexes are crucial factors that govern their cytotoxic activity. In this work, circular dichroism spectroscopy, gel electrophoresis and MALDI-TOF MS spectrometry combined with enzymatic degradation have been used to elucidate the role of bridging ligands in DNA-binding ability and cross-linking patterns of two dinuclear antitumour active platinum(II) complexes, {[cis-Pt(NH(3))(2)Cl](2)L1}(NO(3))(2) (1, L1= 4,4'-methylenedianiline) and {[cis-Pt(NH(3))(2)Cl](2)L2}(NO(3))(2) (2, L2 = alpha,alpha'-diamino-p-xylene). Although both complexes have two cis-diammine-Pt(II) moieties (1,1/c,c), complex 1 exhibits much higher DNA-binding ability than complex 2. The former readily forms both 1,3- and 1,4-intrastrand cross-links with DNA oligonucleotides, while the latter preferentially forms 1,4- rather than 1,3-intrastrand cross-links. Cytotoxicity studies against a human non-small-cell lung cancer cell line (A549) demonstrate that complex 1 has higher activity than 2. These results show that the linker properties play a critical role in controlling the DNA-binding and cross-linking abilities and in modulating the cytotoxicity of dinuclear platinum complexes.
Collapse
Affiliation(s)
- Jianhui Zhu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Barragán F, Moreno V, Marchán V. Solid-phase synthesis and DNA binding studies of dichloroplatinum(ii) conjugates of dicarba analogues of octreotide as new anticancer drugs. Chem Commun (Camb) 2009:4705-7. [PMID: 19641816 DOI: 10.1039/b909698a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first dichloroplatinum(ii) conjugates of dicarba analogues of octreotide, which is expected to act as a 'tumour-targeting device', have been efficiently synthesized following a stepwise solid-phase approach; these compounds emulate the mechanism of cisplatin since they form a 1,2-intrastrand cross-link with two consecutive guanines of an oligonucleotide.
Collapse
Affiliation(s)
- Flavia Barragán
- Departament de Química Orgànica-IBUB, Universitat de Barcelona, Barcelona, E-08028, Spain
| | | | | |
Collapse
|
14
|
Zhu J, Zhao Y, Zhu Y, Wu Z, Lin M, He W, Wang Y, Chen G, Dong L, Zhang J, Lu Y, Guo Z. DNA Cross-Linking Patterns Induced by an Antitumor-Active Trinuclear Platinum Complex and Comparison with Its Dinuclear Analogue. Chemistry 2009; 15:5245-53. [DOI: 10.1002/chem.200900217] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
15
|
Abstract
Chiral substances possess a unique architecture such that, despite sharing identical molecular formulas, atom-to-atom linkages, and bonding distances, they cannot be superimposed. Thus, in the environment of living systems, where specific structure-activity relationships may be required for effect (e.g., enzymes, receptors, transporters, and DNA), the physiochemical and biochemical properties of racemic mixtures and individual stereoisomers can differ significantly. In drug development, enantiomeric selection to maximize clinical effects or mitigate drug toxicity has yielded both success and failure. Further complicating genetic polymorphisms in drug disposition, stereoselective metabolism of chiral compounds can additionally influence pharmacokinetics, pharmacodynamics, and toxicity. Optically pure pharmaceuticals may undergo racemization in vivo, negating single enantiomer benefits or inducing unexpected effects. Appropriate chiral antidotes must be selected for therapeutic benefit and to minimize adverse events. Enantiomers may possess different carcinogenicity and teratogenicity. Environmental toxicology provides several examples in which compound bioaccumulation, persistence, and toxicity show chiral dependence. In forensic toxicology, chiral analysis has been applied to illicit drug preparations and biological specimens, with the potential to assist in determination of cause of death and aid in the correct interpretation of substance abuse and "doping" screens. Adrenergic agonists and antagonist, nonsteroidal anti-inflammatory agents, SSRIs, opioids, warfarin, valproate, thalidomide, retinoic acid, N-acetylcysteine, carnitine, penicillamine, leucovorin, glucarpidase, pesticides, polychlorinated biphenyls, phenylethylamines, and additional compounds will be discussed to illustrate important concepts in "chiral toxicology."
Collapse
Affiliation(s)
- Silas W Smith
- New York University School of Medicine, New York, New York 10016, USA.
| |
Collapse
|
16
|
|
17
|
Algueró B, Pedroso E, Marchán V, Grandas A. Incorporation of two modified nucleosides allows selective platination of an oligonucleotide making it suitable for duplex cross-linking. J Biol Inorg Chem 2007; 12:901-11. [PMID: 17534671 DOI: 10.1007/s00775-007-0243-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2007] [Accepted: 04/30/2007] [Indexed: 11/28/2022]
Abstract
Platinated oligonucleotides are promising tools for the control of gene expression, since they may target and cross-link nucleic acid chains. Here we describe a method for the preparation of platinated oligonucleotides that has proved able to selectively cross-link complementary sequences, making use of 5-methylcytidine analogs with thioether or imidazole groups attached to the 4-position. These nucleoside analogs were derivatized as phosphoramidites and introduced in oligonucleotide chains using standard phosphite triester chemistry. Different oligonucleotide sequences containing either one or two analogs appending from the 5'-end were synthesized and used in preliminary platination studies. The reaction of transplatin with oligonucleotides containing the thioether-modified nucleobase was fast, but generally afforded unstable adducts and complex reaction mixtures. The imidazole-containing oligonucleotides reacted with transplatin much more slowly, in particular at slightly basic pH, and it was found that the imidazole-modified cytosine was less reactive than the natural nucleobases. In contrast, transplatin selectively reacted with the thioether and imidazole groups of oligonucleotides containing the two cytosine analogs in neighboring positions, even in the presence of the four nucleobases and particularly three guanines, affording platinated oligonucleotides suitable for cross-linking.
Collapse
Affiliation(s)
- Berta Algueró
- Departament de Química Orgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | | | | | | |
Collapse
|
18
|
Algueró B, López de la Osa J, González C, Pedroso E, Marchán V, Grandas A. Selective platination of modified oligonucleotides and duplex cross-links. Angew Chem Int Ed Engl 2007; 45:8194-7. [PMID: 17109455 DOI: 10.1002/anie.200603128] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Berta Algueró
- Departament de Química Orgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | | | | | | | | | | |
Collapse
|
19
|
Algueró B, López de la Osa J, González C, Pedroso E, Marchán V, Grandas A. Selective Platination of Modified Oligonucleotides and Duplex Cross-Links. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200603128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
20
|
Moayeri M, Wiggins JF, Lindeman RE, Leppla SH. Cisplatin inhibition of anthrax lethal toxin. Antimicrob Agents Chemother 2006; 50:2658-65. [PMID: 16870755 PMCID: PMC1538677 DOI: 10.1128/aac.01412-05] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacillus anthracis lethal toxin (LT) produces symptoms of anthrax in mice and induces rapid lysis of macrophages derived from certain inbred strains. LT is comprised of a receptor binding component, protective antigen (PA), which delivers the enzymatic component, lethal factor (LF), into cells. We found that mouse macrophages were protected from toxin by the antitumor drug cis-diammineplatinum (II) dichloride (cisplatin). Cisplatin was shown to inhibit LT-mediated cleavage of cellular mitogen-activated protein kinases (MEKs) without inhibiting LF's in vitro proteolytic activity. Cisplatin-treated PA lost 100% of its ability to function in toxicity assays when paired with untreated LF, despite maintaining the ability to bind to cells. Cisplatin-treated PA was unable to form heptameric oligomers required for LF binding and translocation. The drug was shown to modify PA in a reversible noncovalent manner. Not surprisingly, cisplatin also blocked the actions of anthrax edema toxin and of LF-Pseudomonas aeruginosa exotoxin A fusion peptide (FP59), both of which require PA for translocation. Treatment of BALB/cJ mice or Fischer F344 rats with cisplatin at biologically relevant concentrations completely protected the animals from a coadministered lethal dose of LT. However, treatment with cisplatin 2 hours before or after animals received a lethal bolus of toxin did not protect them.
Collapse
Affiliation(s)
- Mahtab Moayeri
- Bacterial Toxins and Therapeutics Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | | | | | | |
Collapse
|
21
|
Najajreh Y, Ardeli-Tzaraf Y, Kasparkova J, Heringova P, Prilutski D, Balter L, Jawbry S, Khazanov E, Perez JM, Barenholz Y, Brabec V, Gibson D. Interactions of platinum complexes containing cationic, bicyclic, nonplanar piperidinopiperidine ligands with biological nucleophiles. J Med Chem 2006; 49:4674-83. [PMID: 16854073 DOI: 10.1021/jm060238j] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The determination of the structures and DNA interactions and the reactions with GSH and ubiquitin of complexes of the general formula trans-[PtCl2(Am)(pip-pip)] x HCl, where pip-pip is 4-piperidinopiperidine and Am is NH3, methylamine (MA), dimethylamine (DMA), n-propylamine (NPA), isopropylamine (IPA), n-butylamine (NBA), or cyclohexylamine (CHA), were performed. X-ray structures and NMR studies of the NH3 and MA complexes showed that both pip rings were in the chair conformation and that the second pip ring is fluxional. The DNA binding studies showed that these complexes bind to calf thymus DNA nearly an order of magnitude more quickly than cisplatin and form covalent adducts that stabilize the double helix. The binding of the pip-pip complexes to DNA results in high unwinding angles (approximately 30 degrees) and in the formation of approximately 25% interstrand cross-links. The pip-pip complexes reacted with GSH more quickly than cisplatin and transplatin, and the rate of reaction decreased with increasing steric bulk of the ligand trans to the pip-pip. The reactions with ubiquitin resulted in monofunctional binding to Met1. Only the NH3, MA, and DMA complexes reacted with ubiquitin in a slower and less efficient fashion than cisplatin.
Collapse
Affiliation(s)
- Yousef Najajreh
- Department of Medicinal Chemistry and Natural Products, Faculty of Pharmacy, Al-Quds University, Jerusalem, P.O. Box 20002, Palestine
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Marchán V, Ortega S, Pulido D, Pedroso E, Grandas A. Diels-Alder cycloadditions in water for the straightforward preparation of peptide-oligonucleotide conjugates. Nucleic Acids Res 2006; 34:e24. [PMID: 16478710 PMCID: PMC1369286 DOI: 10.1093/nar/gnj020] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The Diels-Alder reaction between diene-modified oligonucleotides and maleimide-derivatized peptides afforded peptide-oligonucleotide conjugates with high purity and yield. Synthesis of the reagents was easily accomplished by on-column derivatization of the corresponding peptides and oligonucleotides. The cycloaddition reaction was carried out in mild conditions, in aqueous solution at 37 degrees C. The speed of the reaction was found to vary depending on the size of the reagents, but it can be completed in 8-10 h by reacting the diene-oligonucleotide with a small excess of maleimide-peptide.
Collapse
Affiliation(s)
- Vicente Marchán
- Departament de Química Orgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, E-08028, Barcelona, Spain.
| | | | | | | | | |
Collapse
|
23
|
Balter L, Gibson D. Mass spectrometric studies of the formation and reactivity of trans-[PtCl2(Am)(piperidinopiperidine)] x HCl complexes with ubiquitin. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:3666-72. [PMID: 16285018 DOI: 10.1002/rcm.2244] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
trans-[PtCl2(Am)(pip-pip)] x HCl complexes, where Am = ammine, methylamine and dimethylamine, react with ubiquitin to form 1:1 covalent adducts. The platinum complexes bind exclusively to Met1 of ubiquitin forming trans-[PtCl(S-Met1-Ub)(Am)(pip-pip)] adducts. These adducts are reactive towards nucleophiles and react with deoxyguanosine (dGMP) to form the ternary trans-[Pt(dGMP)(S-Met1-Ub) (Am)(pip-pip)] complex which is stable in water and even in the presence of excess glutathione (GSH). Reaction of trans-[PtCl(S-Met1-Ub)(Am)(pip-pip)] with GSH resulted in the rapid formation of the ternary complex trans-[Pt(GS)(S-Met1-Ub)(Am)(pip-pip)] which was not stable and slowly lost the platinum moiety; after 7 days the platinum moiety was completely removed and the native ubiquitin was regenerated.
Collapse
Affiliation(s)
- Liliana Balter
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy, P.O. Box 12065, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | | |
Collapse
|