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Hayashida O, Tanaka Y, Miyazaki T. Synthesis and Guest-Binding Properties of pH/Reduction Dual-Responsive Cyclophane Dimer. Molecules 2021; 26:molecules26113097. [PMID: 34067275 PMCID: PMC8196905 DOI: 10.3390/molecules26113097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/16/2021] [Accepted: 05/20/2021] [Indexed: 11/16/2022] Open
Abstract
A water-soluble cyclophane dimer having two disulfide groups as a reduction-responsive cleavable bond as well as several acidic and basic functional groups as a pH-responsive ionizable group 1 was successfully synthesized. It was found that 1 showed pH-dependent guest-binding behavior. That is, 1 strongly bound an anionic guest, 6-p-toluidinonaphthalene-2-sulfonate (TNS) with binding constant (K/M−1) for 1:1 host-guest complexes of 9.6 × 104 M−1 at pH 3.8, which was larger than those at pH 7.4 and 10.7 (6.0 × 104 and 2.4 × 104 M−1, respectively), indicating a favorable electrostatic interaction between anionic guest and net cationic 1. What is more, release of the entrapped guest molecules by 1 was easily controlled by pH stimulus. Large favorable enthalpies (ΔH) for formation of host-guest complexes were obtained under the pH conditions employed, suggesting that electrostatic interaction between anionic TNS and 1 was the most important driving force for host-guest complexation. Such contributions of ΔH for formation of host-guest complexes decreased along with increased pH values from acidic to basic solutions. Upon addition of dithiothreitol (DTT) as a reducing reagent to an aqueous PBS buffer (pH 7.4) containing 1 and TNS, the fluorescence intensity originating from the bound guest molecules decreased gradually. A treatment of 1 with DTT gave 2, having less guest-binding affinity by the cleavage of disulfide bonds of 1. Consequently, almost all entrapped guest molecules by 1 were released from the host. Moreover, such reduction-responsive cleavage of 1 and release of bound guest molecules was performed more rapidly in aqueous buffer at pH 10.7.
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Hayashida O, Shibata K. Stimuli-Responsive Supramolecular Coaggregation and Disaggregation of Host-Guest Conjugates Having a Disulfide Linkage. J Org Chem 2020; 85:5493-5502. [PMID: 32233372 DOI: 10.1021/acs.joc.0c00237] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Water-soluble cationic and anionic cyclophanes (1a and 2a, respectively) having a dabsyl group with a cleavable disulfide linkage were synthesized as a host-guest conjugate covalently bound with both host and guest components. Self-inclusion phenomena but not self-aggregation behaviors were observed for each cyclophane in aqueous media. Each cyclophane includes its own dabsyl moiety (guest component) in its macrocyclic cavity (host component) through hydrophobic interaction. When 1 equiv. of cationic 1a was added to an aqueous solution of anionic 2a, however, supramolecular coaggregates formed spontaneously through host-guest complexation. As regard the supramolecular coaggregates, the existence of larger particles was confirmed by DLS measurements and TEM observation. The hydrophobic interaction between the dabsyl moiety and macrocyclic cavity and electrostatic interactions between 1a and 2a play important roles in the supramolecular coaggregate formation. Each cyclophane having a cleavable disulfide linkage was easily transformed to the corresponding thiols by reducing reagents such as DTT, which was confirmed by MALDI-TOF MS. Disaggregation of the supramolecular coaggregates composed of 1a and 2a was successfully performed upon addition of DTT, with release of the thiol derivative of dabsyl. Such disaggregation of the coaggregates was also conducted by other external stimuli such as salts and competitive guests.
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Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma 8-19-1, Fukuoka 814-0180, Japan
| | - Kana Shibata
- Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma 8-19-1, Fukuoka 814-0180, Japan
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Kusano S, Konishi S, Ishikawa R, Sato N, Kawata S, Nagatsugi F, Hayashida O. Synthesis of Water-Soluble Triazinophanes and Evaluation of Their Molecular Recognition Properties. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shuhei Kusano
- Department of Chemistry; Faculty of Science; Fukuoka University; Nanakuma 8-19-1 814-0180 Fukuoka Japan
| | - Sae Konishi
- Department of Chemistry; Faculty of Science; Fukuoka University; Nanakuma 8-19-1 814-0180 Fukuoka Japan
| | - Ryuta Ishikawa
- Department of Chemistry; Faculty of Science; Fukuoka University; Nanakuma 8-19-1 814-0180 Fukuoka Japan
| | - Norihiro Sato
- Institute of Multidisciplinary Research for Advanced Materials; Tohoku University; 2-1-1 Katahira 980-8577 Aoba-ku, Sendai-shi Japan
| | - Satoshi Kawata
- Department of Chemistry; Faculty of Science; Fukuoka University; Nanakuma 8-19-1 814-0180 Fukuoka Japan
| | - Fumi Nagatsugi
- Institute of Multidisciplinary Research for Advanced Materials; Tohoku University; 2-1-1 Katahira 980-8577 Aoba-ku, Sendai-shi Japan
| | - Osamu Hayashida
- Department of Chemistry; Faculty of Science; Fukuoka University; Nanakuma 8-19-1 814-0180 Fukuoka Japan
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Sato K. [Development of Functional Multilayer Nanofilms and Microcapsules Based on Layer-by-Layer Deposition Techniques]. YAKUGAKU ZASSHI 2016; 135:1029-35. [PMID: 26329548 DOI: 10.1248/yakushi.15-00182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Functional multilayer thin films have been prepared by layer-by-layer (LbL) deposition for the development of sensors, separators, and drug delivery systems. In particular, glucose-sensitive LbL films have been widely studied for use as glucose sensors and in glucose-triggered drug delivery systems. In this work, I report on glucose-sensitive LbL films that consist of concanavalin A (ConA), phenylboronic acid (PBA), and glucose oxidase (GOx). ConA/glycogen LbL films were prepared by LbL deposition of ConA and glycogen through a lectin-sugar interaction. Similarly, PBA-modified poly(amidoamine) dendrimer/poly(vinyl alcohol) (PVA) LbL films were prepared through cyclic boronate ester bonds. Both types of films decomposed in the presence of glucose, by the competitive binding of glucose, although these LbL films did not show a satisfactory response to millimolar concentrations of glucose under physiological conditions. PBA-modified poly(allylamine hydrochloride) and PVA films were prepared on a GOx-modified quartz slide. The LbL film was stable over a wide pH range, from 3.0 to 9.0, in the absence of glucose. In contrast, the film decomposed upon exposure to 0.1-10 mM glucose solutions for 60 min at pH 7.4. The glucose-induced decomposition of the film can be explained by the scission of the carbon-boron bond of the PBA residues by hydrogen peroxide, which was produced through the GOx-catalyzed oxidation of glucose. These results suggest this multilayer film may be useful for the development of glucose-sensitive drug delivery systems.
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Affiliation(s)
- Katsuhiko Sato
- Graduate School of Pharmaceutical Sciences, Tohoku Unicersity
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Hayashida O, Kojima M, Kusano S. Biotinylated Cyclophane: Synthesis, Cyclophane-Avidin Conjugates, and Their Enhanced Guest-Binding Affinity. J Org Chem 2015; 80:9722-7. [PMID: 26360807 DOI: 10.1021/acs.joc.5b01809] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cationic and anionic cyclophanes bearing a biotin moiety were synthesized as a water-soluble host (1a and 1b, respectively). Both hosts 1a and 1b were found to strongly bind avidin with binding constants of 1.3 × 10(8) M(-1), as confirmed by surface plasmon resonance measurements. The present conjugate of 1a with avidin (1a-avidin) showed an enhanced guest binding affinity toward fluorescence guests such as TNS and 2,6-ANS. The K values of 1a-avidin conjugate with TNS and 2,6-ANS were ~19-fold larger than those of monocyclic cyclophane 1a with the identical guests. Favorable hydrophobic and electrostatic interactions between 1a-avidin and TNS were suggested by computer-aided molecular modeling calculations. Moreover, addition of excess biotin to the complexes of 1a-avidin with the guests resulted in dissociation of 1a-avidin to avidin and 1a having less guest-binding affinity. Conversely, such enhancements in the guest-binding affinity were not obviously observed for the conjugate of anionic 1b with avidin (1b-avidin) due to electrostatic repulsion between anionic 1b and anionic guests.
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Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Fukuoka 814-0180, Japan
| | - Miwa Kojima
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Fukuoka 814-0180, Japan
| | - Shuhei Kusano
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Fukuoka 814-0180, Japan
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Hayashida O, Sato D. Degradation Properties and pH-responsive Guest-release of Cyclophanes Having Four Ester Side Chains with Terminal Choline Residues. CHEM LETT 2014. [DOI: 10.1246/cl.130964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University
| | - Daisuke Sato
- Department of Chemistry, Faculty of Science, Fukuoka University
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Hayashida O, Kaku Y. Synthesis of dabsyl-appended cyclophanes and their heterodimer formation with pyrene-appended cyclophanes. J Org Chem 2013; 78:10437-42. [PMID: 24047400 DOI: 10.1021/jo4018843] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
As a quencher-type host, dabsyl-appended cyclophanes bearing positively and negatively charged side chains (1a and 1b, respectively) were synthesized. Formation of cyclophane heterodimers of 1a with anionic fluorescent cyclophane bearing a pyrene moiety 2b was confirmed by fluorescence titration experiments. The 1:1 binding constant (K) of 1a toward 2b was calculated to be 1.6 × 10(5) M(-1). On the other hand, almost no complexation affinity of 1a toward cationic analogue of fluorescent cyclophane 2a was confirmed by the identical methods, indicating that electrostatic interactions became effective in the formation of cyclophane heterodimers. In addition, van't Hoff analysis applied to the temperature-dependent K values for the heterodimer formation gave negative enthalpy (ΔH) and entropy changes (ΔS). The large and negative ΔH values as well as small and also negative ΔS values showed that the complexation is an exothermic and enthalpy-controlled but not entropy-driven process. A similar trend of molecular recognition was also confirmed for formation of cyclophane heterodimers of 1b with 2a by the identical methods.
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Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Fukuoka 814-0180, Japan
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Hayashida O, Nakashima T. Synthesis of Cyclophane Dimer Using Cyclophane-tethered Fmoc-amino Acid Derivatives as a Multivalent Host. CHEM LETT 2011. [DOI: 10.1246/cl.2011.134] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ramaiah D, Neelakandan PP, Nair AK, Avirah RR. Functional cyclophanes: promising hosts for optical biomolecular recognition. Chem Soc Rev 2010; 39:4158-68. [PMID: 20730143 DOI: 10.1039/b920032k] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cyclophanes possess a defined cavity size and are efficient in encapsulating and stabilising guest molecules inside the cavity through various non-covalent interactions. This unique property of the cyclophanes has been widely exploited for the development of selective probes for a variety of guest molecules. The present tutorial review highlights the use of various interesting functionalised cyclophane architectures for the sensitive and selective optical recognition of important biomolecules.
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Affiliation(s)
- Danaboyina Ramaiah
- Photosciences and Photonics, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum 695 019, India.
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Abstract
Supramolecular chemistry in water is a constantly growing research area because noncovalent interactions in aqueous media are important for obtaining a better understanding and control of the major processes in nature. This Review offers an overview of recent advances in the area of water-soluble synthetic receptors as well as self-assembly and molecular recognition in water, through consideration of the functionalities that are used to increase the water solubility, as well as the supramolecular interactions and approaches used for effective recognition of a guest and self-assembly in water. The special features and applications of supramolecular entities in aqueous media are also described.
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Affiliation(s)
- Gennady V Oshovsky
- Laboratory of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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Cyclophane-based tetra(resorcinarene) as a host for both histone and hydrophobic molecular guests. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.03.170] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Hayashida O, Hamachi I. Cyclophane-lectin Conjugates as a New Class of Water-soluble Host. J INCL PHENOM MACRO 2005. [DOI: 10.1007/s10847-005-0993-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hayashida O, Takaoka Y, Hamachi I. Synthesis and guest-binding study of polytopic multi(cyclophane) hosts. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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