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Kotammagari TK, Saleh LY, Lönnberg T. Organometallic modification confers oligonucleotides new functionalities. Chem Commun (Camb) 2024; 60:3118-3128. [PMID: 38385213 DOI: 10.1039/d4cc00305e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
To improve their properties or to introduce entirely new functionalities, the intriguing scaffolds of nucleic acids have been decorated with various modifications, most recently also organometallic ones. While challenging to introduce, organometallic modifications offer the potential of expanding the field of application of metal-dependent functionalities to metal-deficient conditions, notably those of biological media. So far, organometallic moieties have been utilized as probes, labels and catalysts. This Feature Article summarizes recent efforts and predicts likely future developments in each of these lines of research.
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Affiliation(s)
- Tharun K Kotammagari
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500 Turku, Finland.
| | - Lange Yakubu Saleh
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500 Turku, Finland.
| | - Tuomas Lönnberg
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500 Turku, Finland.
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2
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Saleh LY, Ora M, Lönnberg T. Organomercury oligonucleotide conjugates as artificial ribonucleases. J Inorg Biochem 2023; 247:112331. [PMID: 37480764 DOI: 10.1016/j.jinorgbio.2023.112331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/03/2023] [Accepted: 07/12/2023] [Indexed: 07/24/2023]
Abstract
Two oligonucleotide conjugates sharing the same sequence but incorporating a different 5'-terminal organometallic moiety were synthesized, by either direct mercuration in solution or oximation with an organomercury aldehyde on solid support. The potential of these conjugates to serve as new type of artificial ribonucleases was tested with a complementary 2´-O-methyl-RNA target sequence featuring a single cleavable RNA phosphodiester linkage. Both organomercury oligonucleotides greatly outperformed their metal-free counterparts as well as the previously reported small molecule organomercury RNA cleaving agent in catalytic activity, providing an important proof-of-concept. Compared to state-of-the-art metal-dependent artificial ribonucleases, however, the observed activity was modest.
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Affiliation(s)
- Lange Yakubu Saleh
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500 Turku, Finland
| | - Mikko Ora
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500 Turku, Finland
| | - Tuomas Lönnberg
- Department of Chemistry, University of Turku, Henrikinkatu 2, 20500 Turku, Finland.
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Hormann J, Verbitsky O, Zhou X, Battistella B, van der Meer M, Sarkar B, Zhao C, Kulak N. Experimental and computational investigation of heteroatom substitution in nucleolytic Cu(II) cyclen complexes for balancing stability and redox activity. Dalton Trans 2023; 52:3176-3187. [PMID: 36790350 DOI: 10.1039/d2dt03284h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Cu(II) complexes of cyclen-based ligands CuL1-CuL6 were synthesized and characterized. The corresponding ligands L1-L6 comprise different donor sets including S and O atoms. Whereas cyclen (L1) is commercially available, L2-L6 were synthesized according to protocols available in the literature. Cleavage activity of the complexes towards plasmid DNA was tested in the presence and absence of ascorbate as a reducing agent (oxidative vs. hydrolytic cleavage). As previously shown, the substitution of N donor atoms with hard donor O atoms leads to efficient oxidative nucleases, but dissociation of the complex upon reduction. We thus opted for S substitution (soft donors) to stabilize the reduced Cu(I) species. Increasing the S content, however, leads to species that are difficult to reoxidize in order to ensure efficient oxidative DNA cleavage. We are showing by experimental (cyclic voltammetry) and computational means (DFT) that the rational combination of O and S atoms next to two nitrogen donors within the macrocycle (oxathiacyclen complex CuL6) leads to the stabilization of both redox states. The complex thus exhibits the highest oxidative DNA cleavage activity within this family of cyclen-based Cu(II) complexes - without leaching of the metal ion during reduction.
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Affiliation(s)
- Jan Hormann
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - Olga Verbitsky
- Institut für Chemie, Otto-von-Guericke-Universität, Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany.
| | - Xiaoyu Zhou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, XinGang Rd. W., Guangzhou 510275, China.
| | - Beatrice Battistella
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany.,Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
| | - Margarete van der Meer
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany.,Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Cunyuan Zhao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, XinGang Rd. W., Guangzhou 510275, China.
| | - Nora Kulak
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany.,Institut für Chemie, Otto-von-Guericke-Universität, Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany.
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4
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Robillard KN, de Vrieze E, van Wijk E, Lentz JJ. Altering gene expression using antisense oligonucleotide therapy for hearing loss. Hear Res 2022; 426:108523. [PMID: 35649738 DOI: 10.1016/j.heares.2022.108523] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 04/20/2022] [Accepted: 05/14/2022] [Indexed: 12/12/2022]
Abstract
Hearing loss affects more than 430 million people, worldwide, and is the third most common chronic physical condition in the United States and Europe (GBD Hearing Loss Collaborators, 2021; NIOSH, 2021; WHO, 2021). The loss of hearing significantly impacts motor and cognitive development, communication, education, employment, and overall quality of life. The inner ear houses the sensory organs for both hearing and balance and provides an accessible target for therapeutic delivery. Antisense oligonucleotides (ASOs) use various mechanisms to manipulate gene expression and can be tailor-made to treat disorders with defined genetic targets. In this review, we discuss the preclinical advancements within the field of the highly promising ASO-based therapies for hereditary hearing loss disorders. Particular focus is on ASO mechanisms of action, preclinical studies on ASO treatments of hearing loss, timing of therapeutic intervention, and delivery routes to the inner ear.
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Affiliation(s)
| | - Erik de Vrieze
- Department of Otorhinolaryngology, RUMC, Geert Grooteplein 10, Route 855, GA, Nijmegen 6525, the Netherlands; Donders Institute for Brain, Cognition, and Behavior, RUMC, Nijmegen, NL
| | - Erwin van Wijk
- Department of Otorhinolaryngology, RUMC, Geert Grooteplein 10, Route 855, GA, Nijmegen 6525, the Netherlands; Donders Institute for Brain, Cognition, and Behavior, RUMC, Nijmegen, NL.
| | - Jennifer J Lentz
- Neuroscience Center of Excellence, LSUHSC, New Orleans, LA, USA; Department of Otorhinolaryngology, LSUHSC, 2020 Gravier Street, Lions Building, Room 795, New Orleans, LA, USA.
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5
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Khursheed S, Siddique HR, Tabassum S, Arjmand F. Water soluble transition metal [Ni(II), Cu(II) and Zn(II)] complexes of N-phthaloylglycinate bis(1,2-diaminocyclohexane). DNA binding, pBR322 cleavage and cytotoxicity. Dalton Trans 2022; 51:11713-11729. [PMID: 35852297 DOI: 10.1039/d2dt01312f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
To validate the effect of metal ions in analogous ligand scaffolds on DNA binding and cytotoxic response, we have synthesized a series of water-soluble ionic N-phthaloylglycinate conjugated bis(diaminocyclohexane)M2+ complexes where M = Ni(II), Cu(II) and Zn(II) (1-3). The structural characterization of the complexes (1-3) was achieved by spectroscopic {FT-IR, EPR, UV-vis absorption data, 1H NMR, ESI-MS and elemental analysis} and single crystal X-ray diffraction studies, which revealed different topologies for the late 3d-transition metals. The Ni(II) and Zn(II) complexes exhibited an octahedral geometry with coordinated labile water molecules in the P1̄ space group while the Cu(II) complex revealed a square planar geometry with the P21/c space lattice. In vitro DNA-complexation studies were performed employing various complementary biophysical methods to quantify the intrinsic binding constant Kb and Ksv values and to envisage the binding modes and binding affinity of (1-3) at the therapeutic targets. The corroborative results of these experiments revealed a substantial geometric and electronic effect of (1-3) on DNA binding and the following inferences were observed, (i) high Kb and Ksv values, (ii) remarkable cleavage efficiency via an oxidative pathway, (iii) condensation behavior and (iv) good cytotoxic response to HepG2 and PTEN-caP8 cancer cell lines, with copper(II) complex 2 outperforming the other two complexes as a most promising anticancer drug candidate. Copper(II) complexes have been proven in the literature to be good anticancer drug entities, displaying inhibition of uncontrolled-cell growth by multiple pathways viz., anti-angiogenesis, inducing apoptosis and reactive oxygen species mediated cell death phenomena. Nickel(II) and zinc(II) ionic complexes 1 and 3 have also demonstrated good chemotherapeutic potential in vitro and the bioactive 1,2-diaminocyclohexane fragment in these complexes plays an instrumental role in anticancer activity.
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Affiliation(s)
- Salman Khursheed
- Department of Chemistry, Aligarh Muslim University, Aligarh, India.
| | - Hifzur R Siddique
- Cytogenetics and Molecular Toxicology Laboratory, Section of Genetics, Department of Zoology, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Sartaj Tabassum
- Department of Chemistry, Aligarh Muslim University, Aligarh, India.
| | - Farukh Arjmand
- Department of Chemistry, Aligarh Muslim University, Aligarh, India.
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Luige O, Bose PP, Stulz R, Steunenberg P, Brun O, Andersson S, Murtola M, Strömberg R. Zn 2+-Dependent peptide nucleic acid-based artificial ribonucleases with unprecedented efficiency and specificity. Chem Commun (Camb) 2021; 57:10911-10914. [PMID: 34590632 DOI: 10.1039/d1cc04383h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We present Zn2+-dependent dimethyl-dipyridophenazine PNA conjugates as efficient RNA cleaving artificial enzymes. These PNAzymes display site-specific RNA cleavage with 10 minute half-lives and cleave clinically relevant RNA models.
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Affiliation(s)
- Olivia Luige
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden.
| | - Partha Pratim Bose
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden.
| | - Rouven Stulz
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden. .,Oligonucleotide Discovery, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.,DMPK, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Peter Steunenberg
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden.
| | - Omar Brun
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden.
| | - Shalini Andersson
- Oligonucleotide Discovery, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Merita Murtola
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden.
| | - Roger Strömberg
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, 141 83 Huddinge, Sweden.
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Ternary Copper Complex of L-Glutamine and Phenanthroline as Counterions of Cyclo-Tetravanadate Anion: Experimental–Theoretical Characterization and Potential Antineoplastic Activity. METALS 2021. [DOI: 10.3390/met11101541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Over the last decade, therapeutic metallodrugs have become substantially effective in the treatment of cancer. Thus, developing new effective anticancer drugs is a significant research area against the continuing increase in cancers worldwide. In the search for heterobimetallic prodrugs containing V/Cu, a new cyclo-tetravanadate was synthesized and characterized by UV-visible and FTIR spectroscopies and single-crystal X-ray diffraction. L-Glutamine and 1,10-phenanthroline allow the crystallization of [Cu(L-Gln)(phen)(H2O)]4[V4O12]∙8(H2O) (1), in which the cyclo-tetravanadate acts as a free anion. Density functional theory (DFT) calculations were carried out to characterize the frontier molecular orbitals and molecular electrostatic potential. Global reactivity indexes were calculated and analyzed to give insight into the cyclo-tetravanadate anion and complex counterions interactions. Also, using Bader’s theory of atoms in molecules (AIM), non-covalent interactions were analyzed. Docking analysis with the Casiopeina-like complex resulting from the hydrolysis of compound 1 provided insights into these complex potential anticancer activities by interacting with DNA/tRNA via H-bonds and hydrophobic interactions. The release of both components could act together or separately, acting as prodrugs with potential dual antineoplastic activities.
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Mersal GAM, Hessien MM, Taleb MFA, Al-Juaid SS, Ibrahim MM. Solid–Liquid Phase Structural Studies of Bis(2-Picolyl)Amine-Based Zinc(II) Complexes as Functional Hydrolase Models: The Detoxification of Fenitrothion. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02105-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Saleh LY, Ora M, Lönnberg T. Cleavage of an RNA Model Compound by an Arylmercury Complex. Chembiochem 2021; 22:1761-1764. [PMID: 33448598 PMCID: PMC8247959 DOI: 10.1002/cbic.202000799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/13/2021] [Indexed: 11/22/2022]
Abstract
A water-soluble arylmercury complex has been synthesized, and its ability to catalyze the cleavage of the phosphodiester linkage of the RNA model compound adenylyl-3',5'-(2',3'-O-methyleneadenosine) has been assessed over a pH range of 3-8.5 and a catalyst concentration range of 0-7 mM. In the presence of 1 mM catalyst, the observed pH-rate profile featured a new pH-independent region between pH 6 and 7, the catalyzed reaction being as much as eight times faster than the background reaction. At pH 7, the acceleration increased linearly from three- to 17-fold upon increasing the catalyst concentration from 1 to 7 mM. The linear dependence indicates a relatively low affinity of the catalyst for the substrate and, hence, the potential for considerable improvement on tethering to an appropriate targeting group, such as an oligonucleotide.
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Affiliation(s)
- Lange Yakubu Saleh
- Department of ChemistryUniversity of TurkuVatselankatu 220014TurkuFinland
| | - Mikko Ora
- Department of ChemistryUniversity of TurkuVatselankatu 220014TurkuFinland
| | - Tuomas Lönnberg
- Department of ChemistryUniversity of TurkuVatselankatu 220014TurkuFinland
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10
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Zellmann F, Göbel MW. A Trisbenzimidazole Phosphoramidite Building Block Enables High-Yielding Syntheses of RNA-Cleaving Oligonucleotide Conjugates. Molecules 2020; 25:molecules25081842. [PMID: 32316292 PMCID: PMC7221912 DOI: 10.3390/molecules25081842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/03/2022] Open
Abstract
The RNA cleaving catalyst tris(2-aminobenzimidazole) when attached to the 5’ terminus of oligonucleotides cuts complementary RNA strands in a highly site-specific manner. Conjugation was previously achieved by the acylation of an amino linker by an active ester of the catalyst. However, this procedure was low yielding and not reliable. Here, a phosphoramidite building block is described that can be coupled to oligonucleotides by manual solid phase synthesis in total yields around 85%. Based on this chemistry, we have now studied the impact of LNA (locked nucleic acids) nucleotides on the rates and the site-specificities of RNA cleaving conjugates. The highest reaction rates and the most precise cuts can be expected when the catalyst is attached to a strong 5’ closing base pair and when the oligonucleotide contains several LNA units that are equally distributed in the strand. However, when placed in the 5’ position, LNA building blocks tend to diminish the specificity of RNA cleavage.
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12
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Mercury(II)-Catalyzed Cleavage, Isomerization and Depurination of RNA and DNA Model Compounds and Desulfurization of Their Phosphoromonothioate Analogs. Catalysts 2020. [DOI: 10.3390/catal10020219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The potential of Hg(II), a metal ion so-far overlooked in the development of artificial nucleases, to cleave RNA and DNA has been assessed. Accordingly, Hg(II)-promoted cleavage and isomerization of the RNA model compound adenylyl-3′,5′-(2′,3′-O-methyleneadenosine) and depurination of 2′-deoxyadenosine were followed by HPLC as a function of pH (5.0–6.0) and the desulfurization of both diastereomers of the phosphoromonothioate analog of adenylyl-3′,5′-(2′,3′-O-methyleneadenosine) at a single pH (6.9). At 5 mM [Hg(II)], cleavage of the RNA model compound was accelerated by two orders of magnitude at the low and by one order of magnitude at the high end of the pH range. Between 0 and 5 mM [Hg(II)], the cleavage rate showed a sigmoidal dependence on [Hg(II)], suggesting the participation of more than one Hg(II) in the reaction. Isomerization and depurination were also facilitated by Hg(II), but much more modestly than cleavage, less than 2-fold over the entire pH range studied. Phosphoromonothioate desulfurization was by far the most susceptible reaction to Hg(II) catalysis, being accelerated by more than four orders of magnitude.
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Rapid Hydrolysis of Organophosphates Induced by U(IV) Nanoparticles: A Kinetic and Mechanistic Study using Spectroscopic Analysis. COLLOIDS AND INTERFACES 2019. [DOI: 10.3390/colloids3040063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The heterogeneous interactions of colloidal U particles with organophosphates, leading to the formation of U-phosphate minerals, can retard the migration of U in contaminated sites. Here, we studied the hydrolytic mechanism of p-nitrophenyl phosphate (NPP) on the surfaces of tetravalent uranium nanoparticles (U(IV)NPs), resulting in the formation of U-phosphate precipitates. Our study shows that the reaction rate of NPP hydrolysis is significantly enhanced by U(IV)NPs through a multi-step heterogeneous reaction on the particle surfaces. The end products of the reaction were identified as U(IV)NPs-aggregates with surface-bound phosphates. Colloidal properties, such as high positive values of the zeta-potential (>+30 mV) and large surface areas of U(IV)NPs due to their unique cluster structures consisting of relatively small primary UO2(cr)-particles, are correlated with their reactivity towards hydrolysis reaction. Reaction kinetic modeling studies using spectrophotometric data indicated the presence of two distinct reaction intermediates as the surface complexes of NPP on U(IV)NPs. We suggest the involvement of the NPP inner-sphere complexes in the rate-determining step based on the results obtained by analyzing the ATR-FTIR spectra and the surface-enhanced infrared absorption of NPP bound to substrate surfaces.
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15
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Hu L, Arifuzzaman MD, Zhao Y. Controlling Product Inhibition through Substrate-Specific Active Sites in Nanoparticle-Based Phosphodiesterase and Esterase. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00630] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Lan Hu
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - MD Arifuzzaman
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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Site-Specific Cleavage of RNAs Derived from the PIM1 3'-UTR by a Metal-Free Artificial Ribonuclease. Molecules 2019; 24:molecules24040807. [PMID: 30813393 PMCID: PMC6412833 DOI: 10.3390/molecules24040807] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 02/19/2019] [Indexed: 11/16/2022] Open
Abstract
Oligonucleotide conjugates of tris(2-aminobenzimidazole) have been reported previously to cleave complementary RNA strands with high levels of sequence and site specificity. The RNA substrates used in these studies were oligonucleotides not longer than 29-mers. Here we show that ~150⁻400-mer model transcripts derived from the 3'-untranslated region of the PIM1 mRNA reacted with rates and specificities comparable to those of short oligonucleotide substrates. The replacement of DNA by DNA/LNA mixmers further increased the cleavage rate. Tris(2-aminobenzimidazoles) were designed to interact with phosphates and phosphate esters. A cell, however, contains large amounts of phosphorylated species that may cause competitive inhibition of RNA cleavage. It is thus important to note that no loss in reaction rates was observed in phosphate buffer. This opens the way to in-cell applications for this type of artificial nuclease. Furthermore, we disclose a new synthetic method giving access to tris(2-aminobenzimidazoles) in multigram amounts.
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17
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Dutta N, Haldar S, Vijaykumar G, Paul S, Chattopadhyay AP, Carrella L, Bera M. Phosphatase-like Activity of Tetranuclear Iron(III) and Zinc(II) Complexes. Inorg Chem 2018; 57:10802-10820. [PMID: 30130107 DOI: 10.1021/acs.inorgchem.8b01441] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nityananda Dutta
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal-741235, India
| | - Shobhraj Haldar
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal-741235, India
| | - Gonela Vijaykumar
- Department of Chemical Sciences, Indian Institute of Science Education & Research Kolkata, Mohanpur, West Bengal-741246, India
| | - Suvendu Paul
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal-741235, India
| | | | - Luca Carrella
- Institut fur Anorganische Chemie und Analytische Chemie, Johannes-Gutenberg Universitat Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Manindranath Bera
- Department of Chemistry, University of Kalyani, Kalyani, West Bengal-741235, India
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Efficient copper-based DNA cleavers from carboxylate benzimidazole ligands. J Biol Inorg Chem 2018; 23:1165-1183. [PMID: 30076466 DOI: 10.1007/s00775-018-1598-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/18/2018] [Indexed: 12/13/2022]
Abstract
Four copper(II) coordination compounds from 2-benzimidazole propionic acid (Hbzpr) and 4-(benzimidazol-2-yl)-3-thiobutanoic acid (Hbztb) were synthesized and fully characterized by elemental analyses, electronic spectroscopy, FT-IR and mass spectrometry. The molecular structure for the four complexes was confirmed by single-crystal X-ray crystallography. The DNA-interacting properties of the two trinuclear and two mononuclear compounds were investigated using different spectroscopic techniques including absorption titration experiments, fluorescence spectroscopy and circular dichroism spectroscopy. Trinuclear [Cu3(bzpr)4(H2O)2](NO3)2·3H2O·CH3OH (2) and [Cu3(bzpr)4Cl2]·3H2O (3) bind to DNA through non-intercalative interactions, while for mononuclear [Cu(bzpr)2(H2O)]·2H2O (1) and [Cu(bztb)2]·2H2O (4), at minor concentrations in relation to the DNA, a groove binding interaction is favored, while at higher concentrations an intercalative mode is preferred. The nuclease properties of all complexes were studied by gel electrophoresis, which showed that they were able to cleave supercoiled plasmid DNA (form I) to the nicked form (form II). Compound 4 is even capable of generating linear form III (resulting from double-strand cleavage). The proposed mechanism of action involves an oxidative pathway (Fenton-type reaction), which produces harmful reactive species, like hydroxyl radicals.
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20
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Castro-Ramírez R, Ortiz-Pastrana N, Caballero AB, Zimmerman MT, Stadelman BS, Gaertner AAE, Brumaghim JL, Korrodi-Gregório L, Pérez-Tomás R, Gamez P, Barba-Behrens N. DNA interactions of non-chelating tinidazole-based coordination compounds and their structural, redox and cytotoxic properties. Dalton Trans 2018; 47:7551-7560. [DOI: 10.1039/c8dt00716k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
DNA interactions of novel tinidazole CuII complexes.
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Affiliation(s)
- Rodrigo Castro-Ramírez
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- Ciudad de México
| | | | - Ana B. Caballero
- Departament de Química Inorgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institute of Nanoscience and Nanotechnology (IN2UB)
| | | | | | | | | | - Luís Korrodi-Gregório
- Department of Pathology and Experimental Therapeutics
- Faculty of Medicine
- University of Barcelona
- 08907 L'Hospitalet de Llobregat
- Spain
| | - Ricardo Pérez-Tomás
- Department of Pathology and Experimental Therapeutics
- Faculty of Medicine
- University of Barcelona
- 08907 L'Hospitalet de Llobregat
- Spain
| | - Patrick Gamez
- Departament de Química Inorgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)
| | - Norah Barba-Behrens
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- Ciudad de México
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21
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Ganeshpandian M, Palaniandavar M, Muruganantham A, Ghosh SK, Riyasdeen A, Akbarsha MA. Ruthenium(II)–arene complexes of diimines: Effect of diimine intercalation and hydrophobicity on DNA and protein binding and cytotoxicity. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4154] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Mani Ganeshpandian
- School of ChemistryBharathidasan University Tiruchirappalli 620 024 Tamil Nadu India
| | | | - Amsaveni Muruganantham
- Theoretical Chemistry Section, Bhabha Atomic Research CentreHomi Bhabha National Institute Mumbai 400 085 India
| | - Swapan K. Ghosh
- Theoretical Chemistry Section, Bhabha Atomic Research CentreHomi Bhabha National Institute Mumbai 400 085 India
| | - Anvarbatcha Riyasdeen
- Mahatma Gandhi‐Doerenkamp Center for Alternatives to Use of Animals in Life Science EducationBharathidasan University Tiruchirappalli 620 024 Tamil Nadu India
| | - Mohammad Abdulkader Akbarsha
- Mahatma Gandhi‐Doerenkamp Center for Alternatives to Use of Animals in Life Science EducationBharathidasan University Tiruchirappalli 620 024 Tamil Nadu India
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22
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Murtola M, Ghidini A, Virta P, Strömberg R. Zinc Ion-Dependent Peptide Nucleic Acid-Based Artificial Enzyme that Cleaves RNA-Bulge Size and Sequence Dependence. Molecules 2017; 22:molecules22111856. [PMID: 29109368 PMCID: PMC6150328 DOI: 10.3390/molecules22111856] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 10/25/2017] [Accepted: 10/27/2017] [Indexed: 11/17/2022] Open
Abstract
In this report, we investigate the efficiency and selectivity of a Zn2+-dependent peptide nucleic acid-based artificial ribonuclease (PNAzyme) that cleaves RNA target sequences. The target RNAs are varied to form different sizes (3 and 4 nucleotides, nt) and sequences in the bulge formed upon binding to the PNAzyme. PNAzyme-promoted cleavage of the target RNAs was observed and variation of the substrate showed a clear dependence on the sequence and size of the bulge. For targets that form 4-nt bulges, we identified systems with an improved efficacy (an estimated half-life of ca 7–8 h as compared to 11–12 h for sequences studied earlier) as well as systems with an improved site selectivity (up to over 70% cleavage at a single site as compared to 50–60% with previous targets sequences). For targets forming 3-nt bulges, the enhancement compared to previous systems was even more pronounced. Compared to a starting point of targets forming 3-nt AAA bulges (half-lives of ca 21–24 h), we could identify target sequences that were cleaved with half-lives three times lower (ca 7–8 h), i.e., at rates similar to those found for the fastest 4-nt bulge system. In addition, with the 3-nt bulge RNA target site selectivity was improved even further to reach well over 80% cleavage at a specific site.
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Affiliation(s)
- Merita Murtola
- Department of Chemistry, University of Turku, 20014 Turku, Finland.
- Department of Biosciences and Nutrition, Karolinska Institutet, Novum, 141 83 Huddinge, Stockholm, Sweden.
| | - Alice Ghidini
- Department of Biosciences and Nutrition, Karolinska Institutet, Novum, 141 83 Huddinge, Stockholm, Sweden.
| | - Pasi Virta
- Department of Chemistry, University of Turku, 20014 Turku, Finland.
| | - Roger Strömberg
- Department of Biosciences and Nutrition, Karolinska Institutet, Novum, 141 83 Huddinge, Stockholm, Sweden.
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23
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Barman SK, Mondal T, Koley D, Lloret F, Mukherjee R. A phenoxo-bridged dicopper(ii) complex as a model for phosphatase activity: mechanistic insights from a combined experimental and computational study. Dalton Trans 2017; 46:4038-4054. [PMID: 28271106 DOI: 10.1039/c6dt03514k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A μ-phenoxo-bis(μ2-1,3-acetato)-bridged dicopper(ii) complex [Cu(L1)(μ-O2CMe)2][NO3] (1) has been synthesized from the perspective of modeling phosphodiesterase activity. Structural characterization was done initially with 1·3Et2O (vapour diffusion of Et2O into MeOH solution of 1; poor crystal quality) and finally with its perchlorate salt [Cu(L1)(μ-O2CMe)2][ClO4]·1.375MeCN·0.25H2O, crystallized from vapour diffusion of n-pentane into a MeCN-MeOH mixture (comparatively better crystal quality). An asymmetric unit of such a crystal contains two independent molecules of compositions [Cu(L1)(μ-O2CMe)2][ClO4] and [Cu(L1)(μ-O2CMe)2(MeCN)][ClO4] (coordinated MeCN with 0.75 occupancy), and two molecules of MeCN and H2O (each H2O molecule with 0.25 occupancy) as the solvent of crystallization. These two cations, each having five-coordinate (μ-phenoxo)bis(μ-acetato)-bridged CuII ions, differ by only the coordination environment of only one CuII ion, which has a weakly coordinated acetonitrile molecule in its sixth position. Temperature-dependent magnetic studies on 1 reveal that the copper(ii) centres are antiferromagnetically coupled with the exchange-coupling constant J = -124(1) cm-1. Theoretically calculated J = -126.51 cm-1, employing a broken-symmetry DFT approach, is in excellent agreement with the experimental value. The dicopper(ii) complex has been found to be catalytically efficient in the hydrolysis of 2-hydroxypropyl-p-nitrophenylphosphate (HPNP). Detailed kinetic experiments and solution studies (potentiometry, species distribution and ESI-MS) were performed to elucidate the reaction mechanism. DFT calculations were performed to discriminate between different possible mechanistic pathways. The free-energy barrier for HPNP hydrolysis catalyzed by 1 is comparable to that obtained from the experimentally-determined value. The involvement of non-covalent (hydrogen-bonding) interaction has also been probed by DFT calculations. The activity of 1 is found to be the highest, compared to the structurally-characterized Mn, Co, Ni and Zn complexes of L1(-) reported earlier, under identical experimental conditions, in which each metal centre is six-coordinate.
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Affiliation(s)
- Suman K Barman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India. and Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Totan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Debasis Koley
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Francesc Lloret
- Departament de Química Inorgànica/Fundació General de la Universitat de València (FGUV)/Instituto de Ciencia, Molecular (ICMOL), Universitat de València, Polígono de la Coma, s/n, 46980-Paterna, València, Spain
| | - Rabindranath Mukherjee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India. and Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
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24
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25
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Laine M, Lönnberg T, Helkearo M, Lönnberg H. Cleavage of short oligoribonucleotides by a Zn2+ binding multi-nucleating azacrown conjugate. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.12.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Bím D, Svobodová E, Eigner V, Rulíšek L, Hodačová J. Copper(II) and Zinc(II) Complexes of Conformationally Constrained Polyazamacrocycles as Efficient Catalysts for RNA Model Substrate Cleavage in Aqueous Solution at Physiological pH. Chemistry 2016; 22:10426-37. [DOI: 10.1002/chem.201601175] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Daniel Bím
- Department of Organic Chemistry, Faculty of Chemical Technology; University of Chemistry and Technology; Technická 5 166 28 Prague 6 Czech Republic), Fax: (+420) 220-444-288
- Institute of Organic Chemistry and Biochemistry; v.v.i. and Gilead Sciences Research Center, Academy of Sciences of the Czech Republic; Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
| | - Eva Svobodová
- Department of Organic Chemistry, Faculty of Chemical Technology; University of Chemistry and Technology; Technická 5 166 28 Prague 6 Czech Republic), Fax: (+420) 220-444-288
| | - Václav Eigner
- Department of Solid State Chemistry, Faculty of Chemical Technology; University of Chemistry and Technology; Technická 5 166 28 Prague 6 Czech Republic
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry; v.v.i. and Gilead Sciences Research Center, Academy of Sciences of the Czech Republic; Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
| | - Jana Hodačová
- Department of Organic Chemistry, Faculty of Chemical Technology; University of Chemistry and Technology; Technická 5 166 28 Prague 6 Czech Republic), Fax: (+420) 220-444-288
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27
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Chen JLY, Pezzato C, Scrimin P, Prins LJ. Chiral Nanozymes-Gold Nanoparticle-Based Transphosphorylation Catalysts Capable of Enantiomeric Discrimination. Chemistry 2016; 22:7028-32. [PMID: 26919202 DOI: 10.1002/chem.201600853] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Indexed: 11/08/2022]
Abstract
Enantioselectivity in RNA cleavage by a synthetic metalloenzyme has been demonstrated for the first time. Thiols containing chiral Zn(II) -binding head groups have been self-assembled on the surface of gold nanoparticles. This results in the spontaneous formation of chiral bimetallic catalytic sites that display different activities (kcat ) towards the enantiomers of an RNA model substrate. Substrate selectivity is observed when the nanozyme is applied to the cleavage of the dinucleotides UpU, GpG, ApA, and CpC, and remarkable differences in reactivity are observed for the cleavage of the enantiomerically pure dinucleotide UpU.
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Affiliation(s)
- Jack L-Y Chen
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Cristian Pezzato
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Paolo Scrimin
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Leonard J Prins
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131, Padova, Italy.
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28
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Fanning AM, Plush SE, Gunnlaugsson T. Tri- and tetra-substituted cyclen based lanthanide(III) ion complexes as ribonuclease mimics: a study into the effect of log Ka, hydration and hydrophobicity on phosphodiester hydrolysis of the RNA-model 2-hydroxypropyl-4-nitrophenyl phosphate (HPNP). Org Biomol Chem 2016; 13:5804-16. [PMID: 25909178 DOI: 10.1039/c4ob02384f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A series of tetra-substituted 'pseudo' dipeptide ligands of cyclen (1,4,7,10,-tetraazacyclododecane) and a tri-substituted 3'-pyridine ligand of cyclen, and the corresponding lanthanide(III) complexes were synthesised and characterised as metallo-ribonuclease mimics. All complexes were shown to promote hydrolysis of the phosphodiester bond of 2-hydroxypropyl-4-nitrophenyl phosphate (HPNP, τ1/2 = 5.87 × 10(3) h), a well known RNA mimic. The La(III) and Eu(III) tri-substituted 3'-pyridine lanthanide(III) complexes being the most efficient in promoting such hydrolysis at pH 7.4 and at 37 °C; with τ1/2 = 1.67 h for La(III) and 1.74 h for Eu(III). The series was developed to provide the opportunity to investigate the consequences of altering the lanthanide(III) ion, coordination ability and hydrophobicity of a metallo-cavity on the rate of hydrolysis using the model phosphodiester, HPNP, at 37 °C. To further provide information on the role that the log Ka of the metal bound water plays in phosphodiester hydrolysis the protonation constants and the metal ion stability constants of both a tri and tetra-substituted 3'pyridine complex were determined. Our results highlighted several key features for the design of lanthanide(III) ribonucelase mimics; the presence of two metal bound water molecules are vital for pH dependent rate constants for Eu(III) complexes, optimal pH activity approximating physiological pH (∼7.4) may be achieved if the log Ka values for both MLOH and ML(OH)2 species occur in this region, small changes to hydrophobicity within the metallo cavity influence the rate of hydrolysis greatly and an amide adjacent to the metal ion capable of forming hydrogen bonds with the substrate is required for achieving fast hydrolysis.
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Affiliation(s)
- Ann-Marie Fanning
- School of Chemistry and Trinity Biomedical Sciences Institute, University of Dublin, Trinity College Dublin, Dublin 2, Ireland.
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29
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Wang X, Liang X. Azobenzene-modified antisense oligonucleotides for site-specific cleavage of RNA with photocontrollable property. RSC Adv 2016. [DOI: 10.1039/c6ra20954h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Photoresponsive azobenzene-modified antisense oligonucleotides for site-specific RNA cleavage by RNase H.
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Affiliation(s)
- Xingyu Wang
- School of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
- College of Food Engineering and Nutritional Science
| | - Xingguo Liang
- School of Food Science and Engineering
- Ocean University of China
- Qingdao
- China
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30
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Zhang X, Liu X, Phillips DL, Zhao C. Hydrolysis mechanisms of BNPP mediated by facial copper(ii) complexes bearing single alkyl guanidine pendants: cooperation between the metal centers and the guanidine pendants. Dalton Trans 2016; 45:1593-603. [DOI: 10.1039/c5dt03949e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The inter-complex and intra-complex nucleophilic attacks by metal-bound hydroxide were investigated by considering the second coordination spheres.
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Affiliation(s)
- Xuepeng Zhang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Xueping Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | | | - Cunyuan Zhao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
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31
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Milton S, Honcharenko D, Rocha CSJ, Moreno PMD, Smith CIE, Strömberg R. Nuclease resistant oligonucleotides with cell penetrating properties. Chem Commun (Camb) 2015; 51:4044-7. [PMID: 25664358 DOI: 10.1039/c4cc08837a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
2'-O-AECM modified oligonucleotides provide an unusual combination of remarkable properties. This includes the combination of high resistance towards enzymatic degradation and the spontaneous cellular uptake of AECM oligonucleotides.
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Affiliation(s)
- Stefan Milton
- Karolinska Institutet, Department of Biosciences and Nutrition, Novum, Hälsovägen 7, SE-14183, Huddinge, Sweden.
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32
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Lain L, Lönnberg H, Lönnberg TA. Buffer catalyzed cleavage of uridylyl-3',5'-uridine in aqueous DMSO: comparison to its activated analog, 2-hydroxypropyl 4-nitrophenyl phosphate. Org Biomol Chem 2015; 13:3484-92. [PMID: 25669674 DOI: 10.1039/c4ob02682a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Buffer catalysis of the cleavage and isomerization of uridylyl-3',5'-uridine (UpU) has been studied over a wide pH range in 80% aq. DMSO. The diminished hydroxide ion concentration in this solvent system made catalysis by amine buffers (morpholine, 4-hydroxypiperidine and piperidine) visible even at relatively low buffer concentrations (10-200 mmol L(-1)). The observed catalysis was, however, much weaker than what has been previously reported for the activated RNA model 2-hydroxypropyl 4-nitrophenyl phosphate (HPNP) in the same solvent system. In the case of morpholine, contribution of both the acidic and the basic buffer constituent was significant, whereas with 4-hydroxypiperidine and piperidine participation of the acidic constituent could not be established unambiguously. The results underline the importance of using realistic model compounds, along with activated ones, in the study of the general acid/base catalysis of RNA cleavage.
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Affiliation(s)
- L Lain
- Department of Chemistry, University of Turku, Vatselankatu 2, FIN-20014 Turku, Finland.
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33
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Joshi T, Graham B, Spiccia L. Macrocyclic metal complexes for metalloenzyme mimicry and sensor development. Acc Chem Res 2015; 48:2366-79. [PMID: 26244894 DOI: 10.1021/acs.accounts.5b00142] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Examples of proteins that incorporate one or more metal ions within their structure are found within a broad range of classes, including oxidases, oxidoreductases, reductases, proteases, proton transport proteins, electron transfer/transport proteins, storage proteins, lyases, rusticyanins, metallochaperones, sporulation proteins, hydrolases, endopeptidases, luminescent proteins, iron transport proteins, oxygen storage/transport proteins, calcium binding proteins, and monooxygenases. The metal coordination environment therein is often generated from residues inherent to the protein, small exogenous molecules (e.g., aqua ligands) and/or macrocyclic porphyrin units found, for example, in hemoglobin, myoglobin, cytochrome C, cytochrome C oxidase, and vitamin B12. Thus, there continues to be considerable interest in employing macrocyclic metal complexes to construct low-molecular weight models for metallobiosites that mirror essential features of the coordination environment of a bound metal ion without inclusion of the surrounding protein framework. Herein, we review and appraise our research exploring the application of the metal complexes formed by two macrocyclic ligands, 1,4,7-triazacyclononane (tacn) and 1,4,7,10-tetraazacyclododecane (cyclen), and their derivatives in biological inorganic chemistry. Taking advantage of the kinetic inertness and thermodynamic stability of their metal complexes, these macrocyclic scaffolds have been employed in the development of models that aid the understanding of metal ion-binding natural systems, and complexes with potential applications in biomolecule sensing, diagnosis, and therapy. In particular, the focus has been on "coordinatively unsaturated" metal complexes that incorporate a kinetically inert and stable metal-ligand moiety, but which also contain one or more weakly bound ligands, allowing for the reversible binding of guest molecules via the formation and dissociation of coordinate bonds. With regards to mimicking metallobiosites, examples are presented from our work on tacn-based complexes developed as simplified structural models for multimetallic enzyme sites. In particular, structural comparisons are made between multinuclear copper(II) complexes formed by such ligands and multicopper enzymes featuring type-2 and type-3 copper centers, such as ascorbate oxidase (AO) and laccase (Lc). Likewise, with the aid of relevant examples, we highlight the importance of cooperativity between either multiple metal centers or a metal center and a proximal auxiliary unit appended to the macrocyclic ligand in achieving efficient phosphate ester cleavage. Finally, the critical importance of the Zn(II)-imido and Zn(II)-phosphate interactions in Zn-cyclen-based systems for delivering highly sensitive electrochemical and fluorescent chemosensors is also showcased. The Account additionally highlights some of the factors that limit the performance of these synthetic nucleases and the practical application of the biosensors, and then identifies some avenues for the development of more effective macrocyclic constructs in the future.
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Affiliation(s)
- Tanmaya Joshi
- School
of Chemistry, Monash University, Victoria 3800, Australia
| | - Bim Graham
- Monash
Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Leone Spiccia
- School
of Chemistry, Monash University, Victoria 3800, Australia
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34
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2,6-Bis(1,4,7,10-tetraazacyclododecan-1-ylmethyl)pyridine and Its Benzene Analog as Nonmetallic Cleaving Agents of RNA Phosphodiester Linkages. Int J Mol Sci 2015; 16:17798-811. [PMID: 26247935 PMCID: PMC4581222 DOI: 10.3390/ijms160817798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 07/13/2015] [Accepted: 07/28/2015] [Indexed: 01/10/2023] Open
Abstract
2,6-Bis(1,4,7,10-tetraazacyclododecan-1-ylmethyl)pyridine (11a) and 1,3-bis(1,4,7,10-tetraazacyclododecan-1-ylmethyl)benzene (11b) have been shown to accelerate at 50 mmol·L−1 concentration both the cleavage and mutual isomerization of uridylyl-3′,5′-uridine and uridylyl-2′,5′-uridine by up to two orders of magnitude. The catalytically active ionic forms are the tri- (in the case of 11b) tetra- and pentacations. The pyridine nitrogen is not critical for efficient catalysis, since the activity of 11b is even slightly higher than that of 11a. On the other hand, protonation of the pyridine nitrogen still makes 11a approximately four times more efficient as a catalyst, but only for the cleavage reaction. Interestingly, the respective reactions of adenylyl-3′,5′-adenosine were not accelerated, suggesting that the catalysis is base moiety selective.
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35
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Zhang X, Tang M, Li F, Zhu Y, Liu C, Zhang W, Wei D. Theoretical study on binding models of copper nucleases containing pyridyl groups to DNA. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1700-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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36
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Oxidative DNA cleavage by Cu(II) complexes: Effect of periphery substituent groups. J Inorg Biochem 2015; 153:143-149. [PMID: 26239544 DOI: 10.1016/j.jinorgbio.2015.07.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 06/05/2015] [Accepted: 07/15/2015] [Indexed: 01/10/2023]
Abstract
A series of structurally-related [Cu(R-benzyl-dipicolylamine)(NO3)2] complexes, where R=methoxy- (1), methyl- (2), H- (3), fluoro- (4), and nitro-group (5), were synthesized, and their activity on DNA cleavage was investigated by linear dichroism (LD) and electrophoresis. The addition of a benzyl group to the dipicolylamine ligand of the [Cu(dipicolylamine)(NO3)2] complex (A), i.e., the [Cu(benzyl-dipicolylamine)(NO3)2] complex (3), caused significant enhancement in the efficiency of oxidative cleavage of both super-coiled (sc) and double stranded (ds) DNA, as evidenced by the electrophoresis pattern and faster decrease in the LD intensity at 260nm. The efficiency in DNA cleavage was also altered with further modifications of the benzyl group by the introduction of various substituents at the para-position. The cleavage efficiency appeared to be the largest when the methyl group was attached. The order of efficiency in DNA cleavage was methyl>methoxy≈H>fluoro≈nitro group. When an electron-withdrawing group was introduced, the cleavage efficiency decreased remarkably. The reactive oxygen species involved in the cleavage process were the superoxide radical and singlet oxygen. A possible mechanism for this variation in the DNA cleavage efficiency was proposed.
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37
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Ning Y, Gao M, Zheng K, Zhang Z, Zhou J, Hao X, Cao R. Phosphate monoester hydrolysis at tricopper site: The advantage and disadvantage of closely assembled trimetallic active sites. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Salvio R, Volpi S, Cacciapaglia R, Casnati A, Mandolini L, Sansone F. Ribonuclease Activity of an Artificial Catalyst That Combines a Ligated CuII Ion and a Guanidinium Group at the Upper Rim of a cone-Calix[4]arene Platform. J Org Chem 2015; 80:5887-93. [DOI: 10.1021/acs.joc.5b00965] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Riccardo Salvio
- Dipartimento
di Chimica and IMC−CNR Sezione Meccanismi di Reazione, Università La Sapienza, 00185 Roma, Italy
| | - Stefano Volpi
- Dipartimento
di Chimica, Università degli Studi di Parma, Viale delle
Scienze 17/A, 43124 Parma, Italy
| | - Roberta Cacciapaglia
- Dipartimento
di Chimica and IMC−CNR Sezione Meccanismi di Reazione, Università La Sapienza, 00185 Roma, Italy
| | - Alessandro Casnati
- Dipartimento
di Chimica, Università degli Studi di Parma, Viale delle
Scienze 17/A, 43124 Parma, Italy
| | - Luigi Mandolini
- Dipartimento
di Chimica and IMC−CNR Sezione Meccanismi di Reazione, Università La Sapienza, 00185 Roma, Italy
| | - Francesco Sansone
- Dipartimento
di Chimica, Università degli Studi di Parma, Viale delle
Scienze 17/A, 43124 Parma, Italy
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Affiliation(s)
- Sa-Sa Wang
- State
Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Guo-Yu Yang
- State
Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- MOE
Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing 100081, China
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40
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Salvio R. The guanidinium unit in the catalysis of phosphoryl transfer reactions: from molecular spacers to nanostructured supports. Chemistry 2015; 21:10960-71. [PMID: 25940903 DOI: 10.1002/chem.201500789] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Examples of guanidinium-based artificial phosphodiesterases are illustrated in this review article. A wide set of collected catalytic systems are presented, from the early examples to the most recent developments of the use of this unit in the design of supramolecular catalysts. Special attention is dedicated to illustrate the operating catalytic mechanism and the role of guanidine/ium units in the catalysis. One or more of these units can act by themselves or in conjunction with other active units. The analogy with the mechanism of enzymatic systems is presented and discussed. In the last part of this overview, recent examples of guanidinophosphodiesterases based on nanostructured supports are reported, namely gold-monolayer-protected clusters and polymer brushes grafted to silica nanoparticles. The issue of the dependence of the catalytic performance on the preorganization of the spacer is tackled and discussed in terms of effective molarity, a parameter that can be taken as a quantitative measurement of this preorganization for both conventional molecular linker and nanosized supports.
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Affiliation(s)
- Riccardo Salvio
- Dipartimento di Chimica and IMC-CNR, Sezione Meccanismi di Reazione, La Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 (Italy).
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Savelli C, Salvio R. Guanidine-Based Polymer Brushes Grafted onto Silica Nanoparticles as Efficient Artificial Phosphodiesterases. Chemistry 2015; 21:5856-63. [DOI: 10.1002/chem.201406526] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Indexed: 12/20/2022]
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Sanyal R, Zhang X, Kundu P, Chattopadhyay T, Zhao C, Mautner FA, Das D. Mechanistic Implications in the Phosphatase Activity of Mannich-Based Dinuclear Zinc Complexes with Theoretical Modeling. Inorg Chem 2015; 54:2315-24. [DOI: 10.1021/ic502937a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Ria Sanyal
- Department
of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Xuepeng Zhang
- MOE
Key Laboratory of Bioinorganic and Synthetic Chemistry, School of
Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Priyanka Kundu
- Department
of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Tanmay Chattopadhyay
- Department
of Chemistry, Panchakot Mahavidyalaya, Sarbari, Purulia 723121, India
| | - Cunyuan Zhao
- MOE
Key Laboratory of Bioinorganic and Synthetic Chemistry, School of
Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Franz A. Mautner
- Institut
fuer Physikalische und Theoretische Chemie, Technische Universitaet Graz, A-8010 Graz, Austria
| | - Debasis Das
- Department
of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
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Chitrapriya N, Shin JH, Hwang IH, Kim Y, Kim C, Kim SK. Synthesis, DNA binding profile and DNA cleavage pathway of divalent metal complexes. RSC Adv 2015. [DOI: 10.1039/c5ra10695h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Divalent metal complexes of dipyridylamine ligand with an anthracene moiety induced considerable oxidative DNA cleavage in the presence hydrogen peroxide and dioxygen.
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Affiliation(s)
| | - Jong Heon Shin
- Department of Chemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - In Hong Hwang
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - Youngmee Kim
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Republic of Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - Seog K. Kim
- Department of Chemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
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Ma C, Chen H, Li C, Zhang J, Qiao R. An IDB-containing low molecular weight short peptide as an efficient DNA cleavage reagent. Org Biomol Chem 2015; 13:4524-31. [DOI: 10.1039/c4ob02518k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present poly(aspartic acid) grafting bis-amine conjugates as artificial nucleases, which can effectively induce double-strand DNA cleavage.
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Affiliation(s)
- Chunying Ma
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Huan Chen
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Chao Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Jin Zhang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Renzhong Qiao
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
- State Key Laboratory of Medicinal Chemical Biology
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45
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Giri GC, Patra A, Vijaykumar G, Carrella L, Bera M. Hydrolytically active tetranuclear [NiII2]2 complexes: synthesis, structure, spectroscopy and phosphoester hydrolysis. RSC Adv 2015. [DOI: 10.1039/c5ra16555e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Hydrolytically active three tetranuclear nickel(ii) complexes of a new symmetrical μ-bis(tetradentate) ligand, H5chdp were prepared and their catalytic activity toward the phosphoester hydrolysis was examined.
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Affiliation(s)
- Gopal C. Giri
- Department of Chemistry
- University of Kalyani
- Kalyani
- India
| | - Ayan Patra
- Department of Chemistry
- University of Kalyani
- Kalyani
- India
| | - Gonela Vijaykumar
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Mohanpur
- India
| | - Luca Carrella
- Institut fur Anorganische Chemie und Analytische Chemie
- Johannes-Gutenberg Universität Mainz
- D-55128 Mainz
- Germany
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46
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Rigo F, Seth PP, Bennett CF. Antisense oligonucleotide-based therapies for diseases caused by pre-mRNA processing defects. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 825:303-52. [PMID: 25201110 DOI: 10.1007/978-1-4939-1221-6_9] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Before a messenger RNA (mRNA) is translated into a protein in the cytoplasm, its pre-mRNA precursor is extensively processed through capping, splicing and polyadenylation in the nucleus. Defects in the processing of pre-mRNAs due to mutations in RNA sequences often cause disease. Traditional small molecules or protein-based therapeutics are not well suited for correcting processing defects by targeting RNA. However, antisense oligonucleotides (ASOs) designed to bind RNA by Watson-Crick base pairing can target most RNA transcripts and have emerged as the ideal therapeutic agents for diseases that are caused by pre-mRNA processing defects. Here we review the diverse ASO-based mechanisms that can be exploited to modulate the expression of RNA. We also discuss how advancements in medicinal chemistry and a deeper understanding of the pharmacokinetic and toxicological properties of ASOs have enabled their use as therapeutic agents. We end by describing how ASOs have been used successfully to treat various pre-mRNA processing diseases in animal models.
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Affiliation(s)
- Frank Rigo
- Isis Pharmaceuticals, 2855 Gazelle Court, Carlsbad, CA, USA,
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Ganeshpandian M, Ramakrishnan S, Palaniandavar M, Suresh E, Riyasdeen A, Akbarsha MA. Mixed ligand copper(II) complexes of 2,9-dimethyl-1,10-phenanthroline: Tridentate 3N primary ligands determine DNA binding and cleavage and cytotoxicity. J Inorg Biochem 2014; 140:202-12. [DOI: 10.1016/j.jinorgbio.2014.07.021] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 07/29/2014] [Accepted: 07/30/2014] [Indexed: 10/24/2022]
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48
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Turkyilmaz S, Rice DR, Palumbo R, Smith BD. Selective recognition of anionic cell membranes using targeted liposomes coated with zinc(ii)-bis(dipicolylamine) affinity units. Org Biomol Chem 2014; 12:5645-55. [PMID: 24962330 PMCID: PMC4128505 DOI: 10.1039/c4ob00924j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 06/18/2014] [Indexed: 01/18/2023]
Abstract
Zinc(ii)-bis(dipicolylamine) (Zn2BDPA) coated liposomes are shown to have high recognition selectivity towards vesicle and cell membranes with anionic surfaces. Robust synthetic methods were developed to produce Zn2BDPA-PEG-lipid conjugates with varying PEG linker chain length. One conjugate (Zn2BDPA-PEG2000-DSPE) was used in liposome formulations doped with the lipophilic near-infrared fluorophore DiR. Fluorescence cell microscopy studies demonstrated that the multivalent liposomes selectively and efficiently target bacteria in the presence of healthy mammalian cells and cause bacterial cell agglutination. The liposomes also exhibited selective staining of the surfaces of dead or dying human cancer cells that had been treated with a chemotherapeutic agent.
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Affiliation(s)
- Serhan Turkyilmaz
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
- Faculty of Pharmacy , Department of Pharmaceutical Chemistry , Istanbul University , 34116 Beyazit , Istanbul , Turkey
| | - Douglas R. Rice
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Rachael Palumbo
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry , 236 Nieuwland Science Hall and University of Notre Dame , Notre Dame , IN 46556 , USA .
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49
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Analogues of nucleosides: synthesis of chiral pyrrolidin-2-ones or pyrrolidines-bearing nucleobases. MONATSHEFTE FUR CHEMIE 2014. [DOI: 10.1007/s00706-014-1251-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Montagner D, Gandin V, Marzano C, Erxleben A. Phosphate Diester Cleavage, DNA Interaction and Cytotoxic Activity of a Bimetallic Bis(1,4,7-triazacyclononane) Zinc Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402319] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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