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Falanga AP, D'Urso A, Travagliante G, Gangemi CMA, Marzano M, D'Errico S, Terracciano M, Greco F, De Stefano L, Dardano P, Rea I, Piccialli G, Oliviero G, Borbone N. Higher-order G-quadruplex structures and porphyrin ligands: Towards a non-ambiguous relationship. Int J Biol Macromol 2024; 268:131801. [PMID: 38670185 DOI: 10.1016/j.ijbiomac.2024.131801] [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: 11/01/2023] [Revised: 01/29/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
Herein, we evaluated the interaction of the tetracationic porphyrin H2TCPPSpm4 with three distinct DNA G-quadruplex (G4) models, i.e., the tetramolecular G4 d(TGGGGT)4 (Q1), the 5'-5' stacked G4-dimer [d(CGGAGGT)4]2 (Q2), and a mixture of 5'-5' stacked G-wires [d(5'-CGGT-3'-3'-GGC-5')4]n (Qn). The combined data obtained from UV-Vis, CD, fluorescence, PAGE, RLS, AFM, NMR, and HPLC-SEC experiments allowed us to shed light on the binding mode of H2TCPPSpm4 with the three G4 models differing for the type and the number of available G4 ending faces, the length of the G4 units, and the number of stacked G4 building blocks. Specifically, we found that H2TCPPSpm4 interacted with the shortest Q1 as an end-stacking ligand, whereas the groove binding mode was ascertained in the case of the Q2 and Qn G4 models. In the case of the interaction with Q1 and Qn, we found that H2TCPPSpm4 induces the formation of supramolecular aggregates at porphyrin/G4 ratios higher than 2:1, whereas no significant aggregation was observed for the interaction with Q2 up to the 5:1 ratio. These results unambiguously demonstrated the suitability of porphyrins for the development of specific G4 ligands or G4-targeting diagnostic probes, being H2TCPPSpm4 capable to distinguish between different G4s.
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Affiliation(s)
- Andrea Patrizia Falanga
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Alessandro D'Urso
- Department of Chemical Sciences, University of Catania, viale Andrea Doria 6, 95125 Catania, Italy
| | - Gabriele Travagliante
- Department of Chemical Sciences, University of Catania, viale Andrea Doria 6, 95125 Catania, Italy
| | | | - Maria Marzano
- CESTEV, University of Naples Federico II, via Tommaso De Amicis 95, 80145 Naples, Italy
| | - Stefano D'Errico
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Monica Terracciano
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Francesca Greco
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Luca De Stefano
- Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, via Pietro Castellino 111, 80131 Naples, Italy
| | - Principia Dardano
- Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, via Pietro Castellino 111, 80131 Naples, Italy
| | - Ilaria Rea
- Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, via Pietro Castellino 111, 80131 Naples, Italy
| | - Gennaro Piccialli
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Giorgia Oliviero
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, via Sergio Pansini 5, 80131 Naples, Italy
| | - Nicola Borbone
- Department of Pharmacy, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy.
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Marzano M, D'Errico S, Greco F, Falanga AP, Terracciano M, Di Prisco D, Piccialli G, Borbone N, Oliviero G. Polymorphism of G-quadruplexes formed by short oligonucleotides containing a 3'-3' inversion of polarity: From G:C:G:C tetrads to π-π stacked G-wires. Int J Biol Macromol 2023; 253:127062. [PMID: 37748594 DOI: 10.1016/j.ijbiomac.2023.127062] [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: 07/13/2023] [Revised: 09/11/2023] [Accepted: 09/21/2023] [Indexed: 09/27/2023]
Abstract
G-wires are supramolecular DNA structures based on the G-quadruplex (G4) structural motif obtained by the self-assembly of interlocked slipped G-rich oligonucleotide (ON) strands, or by end-to-end stacking of G4 units. Despite the increasing interest towards G-wires due to their potential applications in DNA nanotechnologies, the self-assembly process to obtain G-wires having a predefined length and stability is still neither completely understood nor controlled. In our previous studies, we demonstrated that the d(5'CG2-3'-3'-G2C5') ON, characterized by the presence of a 3'-3'-inversion of polarity site self-assembles into a G-wire structure when annealed in the presence of K+ ions. Herein, by using CD, PAGE, HPLC size exclusion chromatography, and NMR investigations we studied the propensity of shorter analogues having sequences 5'CGn-3'-3'-GmC5' (with n = 1 and 1 ≤ m ≤ 3) to form the corresponding G-quadruplexes and stacked G-wires. The results revealed that the formation of G-wires starting from d(5'CGn-3'-3'-GmC5') ONs is possible only for the sequences having n and m > 1 in which both guanosines flanking the 5'-ending cytosines are not involved into the 3'-3' phosphodiester bond.
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Affiliation(s)
- Maria Marzano
- CESTEV, University of Naples Federico II, Via Tommaso De Amicis 95, 80131 Naples, Italy
| | - Stefano D'Errico
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Francesca Greco
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Andrea Patrizia Falanga
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Monica Terracciano
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Daria Di Prisco
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Gennaro Piccialli
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy; ISBE-IT, University of Naples Federico II, Corso Umberto I, 80138 Naples, Italy
| | - Nicola Borbone
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy; ISBE-IT, University of Naples Federico II, Corso Umberto I, 80138 Naples, Italy.
| | - Giorgia Oliviero
- ISBE-IT, University of Naples Federico II, Corso Umberto I, 80138 Naples, Italy; Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Via Sergio Pansini 5, 80131 Naples, Italy
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Prieto-Costas LA, Rivera-Cordero GR, Rivera JM. Quantifying and Modulating Protein Encapsulation in Guanosine-Based Supramolecular Particles. Bioconjug Chem 2023; 34:2112-2122. [PMID: 37903569 DOI: 10.1021/acs.bioconjchem.3c00412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
The encapsulation of proteins is an effective way to preserve their structure and enhance their function. One exciting possibility is adjusting the protective agent to match the specific protein's characteristics to influence its properties. In a recent study, we developed a flow cytometry-based method to quantify the encapsulation of small-molecule dyes in colloidal particles made from guanosine derivatives (supramolecular hacky sacks (SHS) particles). We aimed to determine whether this method could quantify protein encapsulation and track changes and if the particles could be tuned to bind to specific proteins. Our results showed that fluorescein isothiocyanate (FITC)-labeled proteins had apparent association constants in the micromolar range with hydrophobicity as the dominant factor enhancing the affinities. Confocal laser scanning microscopy (CLSM) imaging supported these results and provided additional information about the protein distribution within the particles. We also tested the feasibility of tuning the avidin affinity (AVI) for SHS particles with a biotin ligand. We found that increasing the amount of biotin initially enhanced AVI binding, but then reached saturation, which we hypothesize results from noncovalent cross-linking caused by strong biotin/AVI interactions. CLSM images showed that the linker also impacted the AVI distribution within the particles. Our strategy provides an advantage over other methods for quantifying protein encapsulation by being suitable for high-throughput analysis with high reproducibility. We anticipate that future efforts to use lower-affinity ligands would result in better strategies for modulating protein affinity for drug delivery applications.
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Affiliation(s)
- Luis A Prieto-Costas
- Department of Chemistry and Molecular Sciences Research Center, University of Puerto Rico at Río Piedras, San Juan, Puerto Rico 00926, United States
| | - Génesis R Rivera-Cordero
- Department of Chemistry and Molecular Sciences Research Center, University of Puerto Rico at Río Piedras, San Juan, Puerto Rico 00926, United States
| | - José M Rivera
- Department of Chemistry and Molecular Sciences Research Center, University of Puerto Rico at Río Piedras, San Juan, Puerto Rico 00926, United States
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Das S, Patra D, Shankar S, Ajayaghosh A. Photocycloaddition as a Tool for Modulation of the Lower Critical Solution Temperature in a Molecular π‐System to Control Transmission of Solar Radiation. Angew Chem Int Ed Engl 2022; 61:e202207641. [DOI: 10.1002/anie.202207641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Satyajit Das
- Photosciences and Photonics Section Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Dipak Patra
- Photosciences and Photonics Section Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Sreejith Shankar
- Photosciences and Photonics Section Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Section Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Das S, Patra D, Shankar S, Ajayaghosh A. Photocycloaddition as a Tool for LCST Modulation in a Molecular π‐System to Control Transmission of Solar Radiation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Satyajit Das
- National Institute for Interdisciplinary Science and Technology CSIR Chemical Sciences and Technology Division INDIA
| | - Dipak Patra
- National Institute for Interdisciplinary Science and Technology CSIR Chemical Sciences and Technology Division INDIA
| | - Sreejith Shankar
- National Institute for Interdisciplinary Science and Technology CSIR Chemical Sciences and Technology Division INDIA
| | - Ayyappanpillai Ajayaghosh
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) Photosciences and Photonics Group, Chemical Sciences and Technology Division PappanamcodeIndustrial Estate P. O 695 019 Trivandrum INDIA
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Xiao S, Lee W, Chen F, Zavalij PY, Gutierrez O, Davis JT. Oxidation of 8-thioguanosine gives redox-responsive hydrogels and reveals intermediates in a desulfurization pathway. Chem Commun (Camb) 2020; 56:6981-6984. [PMID: 32436517 DOI: 10.1039/d0cc02926b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A disulfide made by oxidation of 8-thioguanosine is a supergelator. The hydrogels are redox-responsive, as they disassemble upon either reduction or oxidation of the S-S bond. We also identified this disulfide, and 2 other compounds, as intermediates in oxidative desulfurization of 8-thioG to guanosine.
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Affiliation(s)
- Songjun Xiao
- Department of Chemistry & Biochemistry, University of Maryland, College Park, MD 20742, USA.
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Sakakibara S, Yotsuji H, Higashiguchi K, Matsuda K. Photoinduced repetitive separation of a supramolecular assembly composed of an amphiphilic diarylethene mixture. SOFT MATTER 2019; 15:7918-7925. [PMID: 31538159 DOI: 10.1039/c9sm01301f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A supramolecular assembly composed of a two-component mixture of amphiphilic diarylethenes, which have octyloxycarbonyl and N-octylcarbamoyl groups, showed a unique macroscopic transformation upon irradiation with UV light and subsequent standing in the dark. Unlike the pure compounds, the assembly was repetitively separated into a blue sphere and a red-purple sparse structure. Both the blue sphere and the sparse structure turned into colorless spheres upon irradiation with visible light and the divided colorless spheres showed the same response to UV and visible light. Phase diagrams based on the change in absorption spectra upon temperature change suggested that the transformation originates from a LCST transition. In the 0.5 : 0.5 mixture, in contrast to the pure compounds, the transition temperature sharply changed at around 50% of the fraction of the closed-ring isomer. TEM imaging showed that the 0.5 : 0.5 mixture with high photoisomerization yield formed a 10 nm-sized network. Judging from the phase diagram and TEM images, the separation is understood as the local phase transition of the regions with a high fraction of the closed-ring isomer.
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Affiliation(s)
- Seiya Sakakibara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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Enhancement of Immune Responses by Guanosine-Based Particles in DNA Plasmid Formulations against Infectious Diseases. J Immunol Res 2019; 2019:3409371. [PMID: 31240233 PMCID: PMC6556318 DOI: 10.1155/2019/3409371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 02/14/2019] [Accepted: 04/18/2019] [Indexed: 12/14/2022] Open
Abstract
Immunogenicity of DNA vaccines can be efficiently improved by adding adjuvants into their formulations. In this regard, the application of nano- and microparticles as vaccines adjuvants, or delivery systems, provides a powerful tool in designing modern vaccines. In the present study, we examined the role of “Supramolecular Hacky Sacks” (SHS) particles, made via the hierarchical self-assembly of a guanosine derivative, as a novel immunomodulator for DNA plasmid preparations. These plasmids code for the proteins HIV-1 Gag (pGag), the wild-type vaccinia virus Western Reserve A27 (pA27L), or a codon-optimized version of the latter (pOD1A27Lopt), which is also linked to the sequence of the outer domain-1 (OD1) from HIV-1 gp120 protein. We evaluated the enhancement of the immune responses generated by our DNA plasmid formulations in a murine model through ELISpot and ELISA assays. The SHS particles increased the frequencies of IFN-γ-producing cells in mice independently immunized with pGag and pA27L plasmids. Moreover, the addition of SHS to pGag and pA27L DNA plasmid formulations enhanced the production of IFN-γ (Th1-type) over IL-4 (Th2-type) cellular immune responses. Furthermore, pGag and pA27L plasmids formulated with SHS, triggered the production of antigen-specific IgG in mice, especially the IgG2a isotype. However, no improvement of either of those adaptive immune responses was observed in mice receiving pOD1A27Lopt+SHS. Here, we demonstrated that SHS particles have the ability to improve both arms of adaptive immunity of plasmid coding “wild-type” antigens without additional strategies to boost their immunogenicity. To the best of our knowledge, this is the first report of SHS guanosine-based particles as DNA plasmid adjuvants.
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Xiao S, Davis JT. G 4-quartet hydrogels from 5'-hydrazino-guanosine for the non-covalent and covalent remediation of contaminants from water. Faraday Discuss 2018; 209:97-112. [PMID: 29971308 DOI: 10.1039/c8fd00038g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The creation of supramolecular hydrogels from relatively simple building blocks demonstrates the power of molecular self-assembly to make functional materials. G4-quartet hydrogels are appealing for a number of applications, including the environmental remediation of pollutants in water. We find that the guanosine analog, 5'-deoxy-5'-hydrazinoguanosine (HG 2) self-assembles into a self-standing hydrogel in the presence of stoichiometric amounts (0.25 equiv.) of KCl. The higher water solubility of HG 2 (14.5 mM), compared to that of the parent compound G 1 (2.1 mM), likely contributes to its enhanced gelation. The structural basis for this HG 2·KCl hydrogel, confirmed by PXRD, IR and CD, is the G4·K+ quartet, which forms extended 1D ion-channel assemblies that entangle to give a stable and long-lived hydrogel. We also find that adding KCl to a saturated solution of HG 2 triggers the generation of colloidal G4·K+ assemblies in situ that selectively and efficiently binds the anionic dye naphthol blue black (NBB) over a cationic dye. In addition to this non-covalent electrostatic binding of anions, the nucleophilic 5'-hydrazino group in the HG 2·KCl hydrogel HG 2 enables the efficient absorption of propionaldehyde from both the gas phase and from water solution via the formation of covalent hydrazone linkages with the gel matrix.
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Affiliation(s)
- Songjun Xiao
- Department of Chemistry & Biochemistry, University of Maryland, College Park, MD 20742, USA.
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10
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Li X, Poon CT, Hong EYH, Wong HL, Chan AKW, Wu L, Yam VWW. Multi-modulation for self-assemblies of amphiphilic rigid-soft compounds through alteration of solution polarity and temperature. SOFT MATTER 2017; 13:8408-8418. [PMID: 29077127 DOI: 10.1039/c7sm01754e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new class of small molecule-based amphiphilic carbazole-containing compounds has been designed and synthesized. Detailed analysis of the temperature- and solvent-dependent UV-vis absorption spectra has provided insights into the cooperative self-assembly mechanism of the carbazole-containing compounds. Interestingly, the prepared amphiphilic rigid-soft compounds were also found to display a lower critical solution temperature (LCST) behavior in aqueous solution, which is relatively less explored in small molecule-based materials, leading to promising candidates for the design of a new class of thermo-responsive materials.
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Affiliation(s)
- Xiaoying Li
- State Key Laboratory of Supramolecular Structure and Materials and College of Chemistry, Jilin University, Changchun 130012, P. R. China.
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11
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Thakur N, Sargur Ranganath A, Sopiha K, Baji A. Thermoresponsive Cellulose Acetate-Poly(N-isopropylacrylamide) Core-Shell Fibers for Controlled Capture and Release of Moisture. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29224-29233. [PMID: 28795559 DOI: 10.1021/acsami.7b07559] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, we used core-shell electrospinning to fabricate cellulose acetate-poly(N-isopropylacrylamide) (CA-PNIPAM) fibrous membranes and demonstrated the ability of these fibers to capture water from a high humid atmosphere and release it when thermally stimulated. The wettability of the fibers was controlled by using thermoresponsive PNIPAM as the shell layer. Scanning electron and fluorescence microscopes are used to investigate the microstructure of the fibers and confirm the presence of the core and shell phases within the fibers. The moisture capturing and releasing ability of these core-shell CA-PNIPAM fibers was compared with those of the neat CA and neat PNIPAM fibers at room temperature as well as at an elevated temperature. At room temperature, the CA-PNIPAM core-shell fibers are shown to have the maximum moisture uptake capacity among the three samples. The external temperature variations which trigger the moisture response behavior of these CA-PNIPAM fibers fall within the range of typical day and night cycles of deserts, demonstrating the potential use of these fibers for water harvesting applications.
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Affiliation(s)
- Neha Thakur
- Division of Engineering Product Development, Singapore University of Technology and Design (SUTD) , 8 Somapah Rd, 487372, Singapore
| | - Anupama Sargur Ranganath
- Division of Engineering Product Development, Singapore University of Technology and Design (SUTD) , 8 Somapah Rd, 487372, Singapore
| | - Kostiantyn Sopiha
- Division of Engineering Product Development, Singapore University of Technology and Design (SUTD) , 8 Somapah Rd, 487372, Singapore
| | - Avinash Baji
- Division of Engineering Product Development, Singapore University of Technology and Design (SUTD) , 8 Somapah Rd, 487372, Singapore
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Shalaeva YV, Morozova JE, Syakaev VV, Kazakova EK, Ermakova AM, Nizameev IR, Kadirov MK, Konovalov AI. Novel thermoresponsive water-soluble oligomers based on amphiphilic calixresorcinarenes. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1298765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ya. V. Shalaeva
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
- Department of Organic Chemistry, A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russian Federation
| | - Ju. E. Morozova
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
- Department of Organic Chemistry, A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russian Federation
| | - V. V. Syakaev
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
| | - E. Kh. Kazakova
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
| | - A. M. Ermakova
- Department of Organic Chemistry, A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kazan, Russian Federation
| | - I. R. Nizameev
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
- Department of Physics, Kazan National Research Technical University, Kazan, Russian Federation
| | - M. K. Kadirov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
| | - A. I. Konovalov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Science, Kazan, Russian Federation
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Araki T, Murayama S, Usui K, Shimada T, Aoki I, Karasawa S. Self-Assembly Behavior of Emissive Urea Benzene Derivatives Enables Heat-Induced Accumulation in Tumor Tissue. NANO LETTERS 2017; 17:2397-2403. [PMID: 28264561 DOI: 10.1021/acs.nanolett.6b05371] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study we describe the construction of a system composed of thermally responsive molecules that can be induced to accumulate in tumor tissues by heating. EgX molecules consisting of an urea-benzene framework and oligoethylene glycol (OEG) functional groups with an emissive aminoquinoline formed nanoparticles (NPs) ∼10 nm in size at 23 °C with a fluorescence quantum yield of 7-10%. At higher temperatures, additional self-assembly occurred as a result of OEG dehydration, and the NPs grew to over 1000 nm in size; this was accompanied by low critical solution temperature behavior. EgXs accumulated in tumor tissues of mice at a body temperature of around 33-35 °C, an effect that was accelerated by external heating around the tumor to approximately 40 °C as a result of increased particle size and enhanced retention in tissue. These EgX NPs can serve as a tool for in vivo monitoring of tumor progression and response to treatment.
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Affiliation(s)
- Takeru Araki
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Shuhei Murayama
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS) , QST, Anagawa 4-9-1, Inage, Chiba 263-8555, Japan
| | - Kazuteru Usui
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takashi Shimada
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ichio Aoki
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS) , QST, Anagawa 4-9-1, Inage, Chiba 263-8555, Japan
| | - Satoru Karasawa
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
- PRESTO, Japan Science and Technology Agency , Kawaguchi, 332-0012, Japan
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Affiliation(s)
- Surendra H. Mahadevegowda
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link 637371 Singapore Singapore
| | - Mihaiela C. Stuparu
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link 637371 Singapore Singapore
- School of Materials Science and Engineering; Nanyang Technological University; Nanyang Avenue 639798 Singapore Singapore
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Morishita K, Murayama S, Araki T, Aoki I, Karasawa S. Thermal- and pH-Dependent Size Variable Radical Nanoparticles and Its Water Proton Relaxivity for Metal-Free MRI Functional Contrast Agents. J Org Chem 2016; 81:8351-62. [PMID: 27541011 DOI: 10.1021/acs.joc.6b01509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
For development of the metal-free MRI contrast agents, we prepared the supra-molecular organic radical, TEMPO-UBD, carrying TEMPO radical, as well as the urea, alkyl group, and phenyl ring, which demonstrate self-assembly behaviors using noncovalent bonds in an aqueous solution. In addition, TEMPO-UBD has the tertiary amine and the oligoethylene glycol chains (OEGs) for the function of pH and thermal responsiveness. By dynamic light scattering and transmission electron microscopy imaging, the resulting self-assembly was seen to form the spherical nanoparticles 10-150 nm in size. On heating, interestingly, the nanoparticles showed a lower critical solution temperature (LCST) behavior having two-step variation. This double-LCST behavior is the first such example among the supra-molecules. To evaluate of the ability as MRI contrast agents, the values of proton ((1)H) longitudinal relaxivity (r1) were determined using MRI apparatus. In conditions below and above CAC at pH 7.0, the distinguishable r1 values were estimated to be 0.17 and 0.21 mM(-1) s(1), indicating the suppression of fast tumbling motion of TEMPO moiety in a nanoparticle. Furthermore, r1 values became larger in the order of pH 7.0 > 9.0 > 5.0. Those thermal and pH dependencies indicated the possibility of metal-fee MRI functional contrast agents in the future.
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Affiliation(s)
- Kosuke Morishita
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Shuhei Murayama
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), QST , Anagawa 4-9-1, Inage, Chiba-city 263-8555, Japan
| | - Takeru Araki
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Ichio Aoki
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), QST , Anagawa 4-9-1, Inage, Chiba-city 263-8555, Japan
| | - Satoru Karasawa
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.,PRESTO, Japan Science and Technology Agency , Kawaguchi 332-0012, Japan
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16
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García-Arriaga M, Hobley G, Rivera JM. Structural Studies of Supramolecular G-Quadruplexes Formed from 8-Aryl-2'-deoxyguanosine Derivatives. J Org Chem 2016; 81:6026-35. [PMID: 27303787 DOI: 10.1021/acs.joc.6b01113] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Self-assembly is a powerful tool for the construction of complex nanostructures. Despite advances in the field, the development of precise self-assembled structures remains a challenge. We have shown that, in the presence of suitably sized cations like K(+), 8-aryl-2'-deoxyguanosine (8ArG) derivatives self-assemble into sets of coaxially stacked planar tetramers, which we term supramolecular G-quadruplexes (SGQs). Previously, we reported that, when the 8-aryl group is a phenyl ring with a meta-carbonyl group, the resulting supramolecule is a hexadecamer, which is remarkably robust as illustrated by its isostructural assembly in both organic and aqueous environments. We report here a detailed three-dimensional structure of the SGQs formed by lipophilic, and hydrophilic, 8ArG derivatives with either 8-(meta-acetylphenyl), 8-(para-acetylphenyl), or 8-(meta-ethoxycarbonylphenyl) groups. The chirality and close contacts between the subunits impose different levels of steric and electrostatic constraints on opposite sides of the tetrads, which determine their preferred relative orientation. The balance between attractive noncovalent interactions juxtaposed with repulsive steric and electrostatic interactions explains the high cooperativity, fidelity, and stability of these SGQs. These structural studies, together with titration experiments and molecular dynamics simulations, provide insight into the mechanism of formation of these SGQs.
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Affiliation(s)
- Marilyn García-Arriaga
- Department of Chemistry and Molecular Sciences Research Center, University of Puerto Rico at Río Piedras , San Juan, Puerto Rico 00926, United States
| | - Gerard Hobley
- Department of Chemistry and Molecular Sciences Research Center, University of Puerto Rico at Río Piedras , San Juan, Puerto Rico 00926, United States
| | - José M Rivera
- Department of Chemistry and Molecular Sciences Research Center, University of Puerto Rico at Río Piedras , San Juan, Puerto Rico 00926, United States
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