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Wang Y, Yang X, Luo J, Yi S, Guo T, Liao Y, Yu C, Zhang X. Cucurbit[7]uril-based host-guest complexes for improving bioavailability and reducing side effects of piroxicam. Int J Pharm 2024; 660:124351. [PMID: 38897491 DOI: 10.1016/j.ijpharm.2024.124351] [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: 03/21/2024] [Revised: 06/02/2024] [Accepted: 06/15/2024] [Indexed: 06/21/2024]
Abstract
Piroxicam (PX) is a nonsteroidal anti-inflammatory drug (NSAID) commonly associated with gastrointestinal (GI) injuries, including dyspepsia, heartburn, inflammation, bleeding, ulceration, and life-threatening perforation. The β-cyclodextrin (β-CD)-based PX formulation (PX@CD) has been shown to reduce gastric side effects by improving PX's solubility and dissolution rates. However, the solubility of PX can only be increased to a limited extent by β-CD, due to the low binding constant between PX and β-CD (∼100 M-1). As a result, adverse reactions such as epigastric pain and pyrosis are still commonly reported. Cucurbit[7]uril (CB[7]) is a synthetic macrocyclic host compound that binds strongly to various drugs. In this study, we demonstrated that CB[7] forms complexes with PX in the gastric acid environment with a binding constant approximately 70 times higher than that between β-CD and PX. The PX@CB[7] inclusion complexes exhibited rapid dissolution rates in the gastric environment. In addition, PX@CB[7] showed significantly higher oral bioavailability and maximum concentration (Cmax) compared to PX and PX@CD (1:2.5), resulting in improved anti-inflammatory effects in both mouse and rat models. Moreover, PX@CB[7] (1:2.5) had the least adhesion to the gastric mucosa and caused the mildest gastric side effects in rat models when compared to PX, PX@CD (1:2.5), and PX@CB[7] (1:1). Lastly, CB[7] demonstrated good oral biocompatibility in a subacute toxicity evaluation study. These findings indicate that CB[7] could be used as an excipient to improve treatment effectiveness and decrease adverse reactions in orally administered formulations with a favorable safety profile.
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Affiliation(s)
- Yan Wang
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China
| | - Xiaodi Yang
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China
| | - Jianguo Luo
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China
| | - Sisi Yi
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China
| | - Tao Guo
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China
| | - Yue Liao
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China
| | - Chao Yu
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
| | - Xiangjun Zhang
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, PR China.
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Kommera SP, Kumar A, Chitkara D, Mittal A. Pramlintide an Adjunct to Insulin Therapy: Challenges and Recent Progress in Delivery. J Pharmacol Exp Ther 2024; 388:81-90. [PMID: 37863489 DOI: 10.1124/jpet.123.001679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 09/28/2023] [Accepted: 10/02/2023] [Indexed: 10/22/2023] Open
Abstract
Dysregulation of various glucoregulatory hormones lead to failure of insulin monotherapy in patients with diabetes mellitus due to various reasons, including severe hypoglycemia, glycemic hypervariability, and an increased risk of microvascular complications. However, pramlintide as an adjunct to insulin therapy enhances glucagon suppression and thereby offers improved glycemic control. Clinical studies have shown that pramlintide improves glycemic control, reduces postprandial glucose excursions, and promotes weight loss in patients with type 1 and type 2 diabetes. Although clinical benefits of pramlintide are well reported, there still exists a high patient resistance for the therapy, as separate injections for pramlintide and insulin must be administered. Although marketed insulin formulations generally demonstrate a peak action in 60-90 minutes, pramlintide elicits its peak concentration at around 20-30 minutes after administration. Thus, owing to the significant differences in pharmacokinetics of exogenously administered pramlintide and insulin, the therapy fails to elicit its action otherwise produced by the endogenous hormones. Hence, strategies such as delaying the release of pramlintide by using inorganic polymers like silica, synthetic polymers like polycaprolactone, and lipids have been employed. Also, approaches like noncovalent conjugation, polyelectrolyte complexation, and use of amphiphilic excipients for codelivery of insulin and pramlintide have been explored to address the issues with pramlintide delivery and improve patient adherence to the therapy. This approach may usher in a new era of diabetes management, offering patients multiple options to tailor their treatment and improve their quality of life. SIGNIFICANCE STATEMENT: To our knowledge, this is the first report that summarizes various challenges in insulin and pramlintide codelivery and strategies to overcome them. The paper also provides deeper insights into various novel formulation strategies for pramlintide that could further broaden the reader's understanding of peptide codelivery.
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Affiliation(s)
- Sai Pradyuth Kommera
- Department of Pharmacy, Birla Institute of Technology and Science (BITS PILANI), Pilani, Rajasthan, India
| | - Ankur Kumar
- Department of Pharmacy, Birla Institute of Technology and Science (BITS PILANI), Pilani, Rajasthan, India
| | - Deepak Chitkara
- Department of Pharmacy, Birla Institute of Technology and Science (BITS PILANI), Pilani, Rajasthan, India
| | - Anupama Mittal
- Department of Pharmacy, Birla Institute of Technology and Science (BITS PILANI), Pilani, Rajasthan, India
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Liu Y, Hu C, Serna JA, Biedermann F, Levkin PA. Binding affinity-based intracellular drug detection enabled by a unimolecular cucurbit[7]uril-dye conjugate. RSC Chem Biol 2023; 4:760-764. [PMID: 37799577 PMCID: PMC10549235 DOI: 10.1039/d3cb00131h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 08/29/2023] [Indexed: 10/07/2023] Open
Abstract
Label-free fluorescence-based chemosensing has been increasingly brought into focus due to its simplicity and high sensitivity for intracellular monitoring of molecules. Currently used methods, such as conventional indicator displacement assays (IDAs), pose limitations related to dissociation upon dilution, random diffusion of the released indicators, and high sensitivity to interference by agents from the ambient cellular environment (e.g., salts, enzymes, and proteins). Herein we report a potentially widely applicable strategy to overcome the limitations of conventional IDAs by employing a macrocyclic cucurbit[7]uril (CB7) host covalently coupled to a nitrobenzoxadiazole (NBD) fluorescent dye (CB7-NBD conjugate). As a proof of concept, we demonstrated that the CB7-NBD unimolecular conjugate responded to various target analytes even in the complex live cell system. Moreover, the sensing system was compatible with fluorescence imaging, fluorescence-assisted cell sorting (FACS), and fluorescence spectrometry with a microplate reader. These experiments demonstrated an application of covalently bound unimolecular CB7-NBD conjugate as a sensor for detecting diverse analytes in the intracellular compartment of live cells.
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Affiliation(s)
- Yanxi Liu
- Karlsruhe Institute of Technology (KIT), Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen 76344 Germany
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University) and Key Laboratory of Tumor Immunopathology, Ministry of Education of China Chongqing 400038 China
| | - Changming Hu
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz Platz 1 Eggenstein-Leopoldshafen 76344 Germany
| | - Julian A Serna
- Karlsruhe Institute of Technology (KIT), Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen 76344 Germany
| | - Frank Biedermann
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz Platz 1 Eggenstein-Leopoldshafen 76344 Germany
| | - Pavel A Levkin
- Karlsruhe Institute of Technology (KIT), Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen 76344 Germany
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC) Kaiserstraße 12 Karlsruhe 76131 Germany
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Zhang L, Wang L, Zhao X, Wang X, Tao Z, Zhang Q. The interaction between cucurbit[7]uril and trimethoprim and its effect on the properties of trimethoprim. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ji QT, Hu DK, Mu XF, Tian XX, Zhou L, Yao S, Wang XH, Xiang SZ, Ye HJ, Fan LJ, Wang PY. Cucurbit[7]uril-Mediated Supramolecular Bactericidal Nanoparticles: Their Assembly Process, Controlled Release, and Safe Treatment of Intractable Plant Bacterial Diseases. NANO LETTERS 2022; 22:4839-4847. [PMID: 35667033 DOI: 10.1021/acs.nanolett.2c01203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A safe, biocompatible, and stimuli-responsive cucurbit[7]uril-mediated supramolecular bactericidal nanoparticle was fabricated by encapsulating a highly bioactive carbazole-decorated imidazolium salt (A1, EC50 = 0.647 μg/mL against phytopathogen Xanthomonas oryzae pv oryzae) into the host cucurbit[7]uril (CB[7]), thereby leading to self-assembled topographies from microsheets (A1) to nanospheroidal architectures (A1@CB[7]). The assembly behaviors were elucidated by acquired single-crystal structures, 1H NMR, ITC, and X-ray powder diffraction experiments. Complex A1@CB[7] displayed lower phytotoxicity and could efficiently switch on its potent antibacterial ability via introducing a simple competitor 1-adamantanamine hydrochloride (AD). In vivo antibacterial trials against rice bacterial blight revealed that A1@CB[7] could relieve the disease symptoms after being triggered by AD and provide a workable control efficiency of 42.6% at 100 μg/mL, which was superior to bismerthiazol (33.4%). These materials can provide a viable platform for fabricating diverse stimuli-responsive supramolecular bactericides for managing bacterial infections with improved safety.
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Affiliation(s)
- Qing-Tian Ji
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - De-Kun Hu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xian-Fu Mu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xiao-Xue Tian
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Li Zhou
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Si Yao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Xiao-Hui Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Shu-Zhen Xiang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Hao-Jie Ye
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Li-Jun Fan
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Pei-Yi Wang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
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Li Q, Sun JD, Yang B, Wang H, Zhang DW, Ma D, Li ZT. Cucurbit[7]uril-threaded flexible organic frameworks: Quantitative polycatenation through dynamic covalent chemistry. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Andrade-Villalobos F, Zúñiga-Núñez D, Fuentealba D, Fierro A. Binding of toluidine blue-myristic acid derivative to cucurbit[7]uril and human serum albumin: computational and biophysical insights towards a biosupramolecular assembly. Phys Chem Chem Phys 2022; 24:3222-3230. [PMID: 35044390 DOI: 10.1039/d1cp04307b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A new toluidine blue-myristic acid photosensitizer derivate (TBOMyr) was investigated as a design molecule to bind simultaneously to cucurbit[7]uril (CB[7]) and human serum albumin (HSA) with the aim of constructing a biosupramolecular assembly. Molecular docking and dynamics calculations revealed the main supramolecular and bio-molecular interactions of TBOMyr with the macrocycle or the protein, respectively. The addition of the negatively charged myristic acid-like tail resulted in a unique conformation of the CB[7] complex where the phenothiazine core was included in the cavity of CB[7], leaving the fatty acid portion free to interact with the protein. A favorable ternary interaction between TBOMyr, CB[7] and HSA was suggested by the calculations, and an experimental binding affinity in the order of 105 M-1 was determined for the TBOMyr@CB[7] complex with HSA. The new TBOMyr derivative could find applications in photodynamic therapy benefiting from the biosupramolecular interactions as a transport system.
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Affiliation(s)
- Felipe Andrade-Villalobos
- Departamento de Química Orgánica, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile. .,Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile.
| | - Daniel Zúñiga-Núñez
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile.
| | - Denis Fuentealba
- Laboratorio de Química Supramolecular y Fotobiología, Departamento de Química Física, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile.
| | - Angelica Fierro
- Departamento de Química Orgánica, Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile.
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Alrawashdeh L, Assaf KI, Alshaer W, Odeh F, Bani-Atta SA. Preparation, characterization, and biological activity study of thymoquinone-cucurbit[7]uril inclusion complex. RSC Adv 2022; 12:1982-1988. [PMID: 35425234 PMCID: PMC8979228 DOI: 10.1039/d1ra08460g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 12/24/2021] [Indexed: 12/02/2022] Open
Abstract
In this study, the formation of a host–guest inclusion complex between cucurbit[7]uril (CB[7]) and thymoquinone (TQ) was investigated in aqueous solution. The formation of a stable inclusion complex, CB[7]–TQ, was confirmed by using different techniques, such as 1H NMR and UV-visible spectroscopy. The aqueous solubility of TQ was clearly enhanced upon the addition of CB[7], which provided an initial indication for supramolecular complexation. The complexation stoichiometry and the binding constant of the inclusion complex were determined through a combination of two sets of titration methods, including UV-visible and fluorescence displacement titrations. Both methods suggested the formation of a 1 : 1 stoichiometry between CB[7] and TQ with moderate binding affinity of 3 × 103 M−1. Density functional theory (DFT) calculations were also performed to verify the structure of the resulted host–guest complex and to support the complexation stoichiometry. The theoretical calculations were in agreement with experimental results obtained by 1H NMR spectroscopy. Most importantly, the cytotoxic effect of the CB[7]–TQ complex was investigated against cancer and normal cell lines. The results showed that the anticancer activity of TQ against MDA-MB-231 cells was enhanced by the complexation with CB[7], while no significant effect was observed in MCF-7 cells. The results also confirmed the low toxicity of the CB[7] host molecule that supports the use of CB[7] as a drug carrier. The host–guest inclusion complexation of thymoquinone by cucurbit[7]uril in aqueous solution is established, which results in an enhanced biological activity.![]()
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Affiliation(s)
- Lubna Alrawashdeh
- Department of Chemistry, Faculty of Science, The Hashemite University P.O. Box 330127 Zarqa 13133 Jordan
| | - Khaleel I Assaf
- Department of Chemistry, Al-Balqa Applied University Al-Salt 19117 Jordan
| | - Walhan Alshaer
- Cell Therapy Center, The University of Jordan Amman 11942 Jordan
| | - Fadwa Odeh
- Department of Chemistry, School of Science, The University of Jordan Amman 11942 Jordan
| | - Suhair A Bani-Atta
- Department of Chemistry, Faculty of Science, University of Tabuk 71491 Saudi Arabia
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Kwong CHT, Mu J, Li S, Fang Y, Liu Q, Zhang X, Kam H, Lee SMY, Chen Y, Deng F, Zhou X, Wang R. Reviving chloroquine for anti-SARS-CoV-2 treatment with cucurbit[7]uril-based supramolecular formulation. CHINESE CHEM LETT 2021; 32:3019-3022. [PMID: 33840982 PMCID: PMC8019245 DOI: 10.1016/j.cclet.2021.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 01/08/2023]
Abstract
The wide-spreading SARS-CoV-2 virus has put the world into boiling water for more than a year, however pharmacological therapies to act effectively against coronavirus disease 2019 (COVID-19) remain elusive. Chloroquine (CQ), an antimalarial drug, was found to exhibit promising antiviral activity in vitro and in vivo at a high dosage, thus CQ was approved by the FDA for the emergency use authorization (EUA) in the fight against COVID-19 in the US, but later was revoked the EUA status due to the severe clinical toxicity. Herein, we show that supramolecular formulation of CQ by a macrocyclic host, curcurbit[7]uril (CB[7]), reduced its non-specific toxicity and improved its antiviral activity against coronavirus, working in synergy with CB[7]. CB[7] was found to form 1:1 host-guest complexes with CQ, with a binding constant of ∼104 L/mol. The CQ-CB[7] formulation decreased the cytotoxicity of CQ against Vero E6 and L-02 cell lines. In particular, the cytotoxicity of CQ (60 μmol/L) against both Vero E6 cell line and L-02 cell lines was completely inhibited in the presence of 300 μmol/L and 600 μmol/L CB[7], respectively. Furthermore, the CB[7] alone showed astonishing antiviral activity in SARS-CoV-2 infected Vero E6 cells and mouse hepatitis virus strain A59 (MHV-A59) infected N2A cells, and synergistically improved the antiviral activity of CQ-CB[7], suggesting that CB[7]-based CQ formulation has a great potential as a safe and effective antiviral agent against SARS-CoV-2 and other coronavirus.
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Affiliation(s)
- Cheryl H T Kwong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Jingfang Mu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences (CAS), Wuhan 430071, China
| | - Shengke Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Yaohui Fang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences (CAS), Wuhan 430071, China
| | - Qianyun Liu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xiangjun Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Hiotong Kam
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Simon M Y Lee
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Yu Chen
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Fei Deng
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences (CAS), Wuhan 430071, China
| | - Xi Zhou
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences (CAS), Wuhan 430071, China
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
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Robinson-Duggon J, McTiernan CD, Muñoz M, Guerra D, Escobar Álvarez E, Andrade-Villalobos F, Fierro A, Edwards AM, Alarcon EI, Fuentealba D. Biosupramolecular complexes of amphiphilic photosensitizers with human serum albumin and cucurbit[7]uril as carriers for photodynamic therapy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 223:112284. [PMID: 34450362 DOI: 10.1016/j.jphotobiol.2021.112284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/21/2021] [Accepted: 08/09/2021] [Indexed: 01/17/2023]
Abstract
In the present work, we evaluated the supramolecular interactions between three photosensitizers, namely toluidine blue O (TBO, positively charged) and two fatty acid conjugates of 6 and 14 carbon atoms chain lengths (TBOC6 and TBOC14), with human serum albumin (HSA) and the macrocycle cucurbit[7]uril (CB[7]), alone or in combination within a biosupramolecular system as potential carriers of photosensitizers for Photodynamic therapy (PDT). Binding studies were carried out using photophysical and calorimetric techniques and accompanied with molecular docking simulations. Amphiphilic photosensitizers, particularly TBOC14, showed stronger binding to HSA and (CB[7]). Comparing the different delivery systems, (CB[7]) had a marginal effect on cell uptake and phototoxicity in HeLa cells, while HSA showed enhanced cell uptake with phototoxicities that depended on the photosensitizer. Despite low cell uptake, the combination of both (CB[7]) and HSA was the most phototoxic, which illustrates the potential of combining these systems for PDT applications.
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Affiliation(s)
- José Robinson-Duggon
- Laboratorio de Química Biosupramolecular, Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile; Departamento de Bioquímica, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá 0824, Panamá.
| | - Christopher D McTiernan
- BEaTS Research Laboratory, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, ON K1Y4W7, Canada
| | - Marcelo Muñoz
- BEaTS Research Laboratory, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, ON K1Y4W7, Canada
| | - Daniel Guerra
- Laboratorio de Química Biosupramolecular, Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Elizabeth Escobar Álvarez
- Laboratorio de Química Biosupramolecular, Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Felipe Andrade-Villalobos
- Laboratorio de Química Biosupramolecular, Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile; Departamento de Química Orgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Angélica Fierro
- Departamento de Química Orgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Ana María Edwards
- Laboratorio de Química Biosupramolecular, Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Emilio I Alarcon
- BEaTS Research Laboratory, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, ON K1Y4W7, Canada; Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Denis Fuentealba
- Laboratorio de Química Biosupramolecular, Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Macul, Santiago, Chile.
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Wu H, Wang H, Qi F, Xia T, Xia Y, Xu JF, Zhang X. An Activatable Host-Guest Conjugate as a Nanocarrier for Effective Drug Release through Self-Inclusion. ACS APPLIED MATERIALS & INTERFACES 2021; 13:33962-33968. [PMID: 34279919 DOI: 10.1021/acsami.1c09823] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
There is a challenge in supramolecular chemotherapy for constructing a system equipped with both sufficient protection and high-efficiency release of drugs. To this end, a new strategy of an activatable host-guest conjugate with self-inclusion property is proposed. Based on the binding affinity gain of intramolecular host-guest self-inclusion, an activatable host-guest conjugate was designed, bearing cucurbit[7]uril as the host, an alkyl ammonium moiety as the guest, and the redox-responsive disulfide linkage. Oxaliplatin, a clinical antitumor drug, could be firmly encapsulated by the activatable host-guest conjugate to form the supramolecular drug with high stability. Moreover, oxaliplatin loaded in the activatable host-guest conjugate could be almost completely released by self-inclusion triggered by glutathione in a tumor microenvironment, thus exhibiting comparable antitumor bioactivity with naked oxaliplatin through in vitro cell experiments. It is highly anticipated that this line of research may open new horizons for programmable and on-demand supramolecular chemotherapy with high antitumor efficiency.
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Affiliation(s)
- Han Wu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hua Wang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Feilong Qi
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, China
| | - Tian Xia
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yu Xia
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Jiang-Fei Xu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xi Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
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12
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Pashkina E, Aktanova A, Mirzaeva I, Kovalenko E, Andrienko I, Knauer N, Pronkina N, Kozlov V. The Effect of Cucurbit[7]uril on the Antitumor and Immunomodulating Properties of Oxaliplatin and Carboplatin. Int J Mol Sci 2021; 22:ijms22147337. [PMID: 34298956 PMCID: PMC8303694 DOI: 10.3390/ijms22147337] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/01/2021] [Accepted: 07/01/2021] [Indexed: 11/16/2022] Open
Abstract
Cucurbit[7]uril (CB[7]) is a molecular container that may form host–guest complexes with platinum(II) anticancer drugs and modulate their efficacy and safety. In this paper, we report our studies of the effect of CB[7]–oxaliplatin complex and the mixture of CB[7] and carboplatin (1:1) on viability and proliferation of a primary cell culture (peripheral blood mononuclear cells), two tumor cell lines (B16 and K562) and their activity in the animal model of melanoma. At the same time, we studied the impact of platinum (II) drugs with CB[7] on T cells and B cells in vitro. Although the stable CB[7]–carboplatin complex was not formed, the presence of cucurbit[7]uril affected the biological properties of carboplatin. In vivo, CB[7] increased the antitumor effect of carboplatin, but, at the same time, increased its acute toxicity. Compared to free oxaliplatin, its complex with CB[7] shows a greater cytotoxic effect on tumor cell lines B16 and K562, while in vivo, the effects of the free drug and encapsulated drug were comparable. However, in vivo studies also demonstrated that the encapsulation of oxaliplatin in CB[7] lowered the toxicity of the drug.
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Affiliation(s)
- Ekaterina Pashkina
- Research Institute of Fundamental and Clinical Immunology, 14 Yadrintsevskaya St, 630099 Novosibirsk, Russia; (A.A.); (N.K.); (N.P.); (V.K.)
- Department of Clinical Immunology, Novosibirsk State Medical University, 52 Krasny Prospect, 630091 Novosibirsk, Russia
- Correspondence:
| | - Alina Aktanova
- Research Institute of Fundamental and Clinical Immunology, 14 Yadrintsevskaya St, 630099 Novosibirsk, Russia; (A.A.); (N.K.); (N.P.); (V.K.)
| | - Irina Mirzaeva
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Lavrentiev Ave, 630090 Novosibirsk, Russia; (I.M.); (E.K.); (I.A.)
| | - Ekaterina Kovalenko
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Lavrentiev Ave, 630090 Novosibirsk, Russia; (I.M.); (E.K.); (I.A.)
| | - Irina Andrienko
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Lavrentiev Ave, 630090 Novosibirsk, Russia; (I.M.); (E.K.); (I.A.)
| | - Nadezhda Knauer
- Research Institute of Fundamental and Clinical Immunology, 14 Yadrintsevskaya St, 630099 Novosibirsk, Russia; (A.A.); (N.K.); (N.P.); (V.K.)
| | - Natalya Pronkina
- Research Institute of Fundamental and Clinical Immunology, 14 Yadrintsevskaya St, 630099 Novosibirsk, Russia; (A.A.); (N.K.); (N.P.); (V.K.)
| | - Vladimir Kozlov
- Research Institute of Fundamental and Clinical Immunology, 14 Yadrintsevskaya St, 630099 Novosibirsk, Russia; (A.A.); (N.K.); (N.P.); (V.K.)
- Department of Clinical Immunology, Novosibirsk State Medical University, 52 Krasny Prospect, 630091 Novosibirsk, Russia
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13
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Shan P, Lin R, Liu M, Tao Z, Xiao X, Liu J. Recognition of glycine by cucurbit[5]uril and cucurbit[6]uril: A comparative study of exo- and endo-binding. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.02.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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Wang Q, Lü LB, Tao Z, Sun T, Tang Q, Huang Y. The pH and mercury ion stimuli-responsive supramolecular assemblies of cucurbit[7]uril and Hoechst 33342. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119656. [PMID: 33744695 DOI: 10.1016/j.saa.2021.119656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/18/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
In the present work, we have investigated the effect of pH and mercury ions on the host-guest complex formed between cucurbit[7]uril (Q[7]) and Hoechst 33342 (H33342). 1H NMR, UV-vis and fluorescence spectroscopy revealed that acid/base stimulation could change the binding stoichiometry between Q[7] and H33342. The results suggest that two complexation equilibria (1:1 and 2:1) may exist between H33342 and Q[7] at pH 2.0 and 4.5, respectively. However, a 1:1 host-guest complex was formed between H33342 and Q[7] at pH 7.0 and 10.0. Q[7] shows differential affinities for the protonated and neutral forms of H33342 dye. Moreover, the switching between H33342∙2H+@2Q[7](1:2) at pH 4.5 and H33342∙H+@Q[7](1:1) at pH 7.0 was reversible. Furthermore, as a metal stimulus, Hg2+ ions could push (i) Q[7] from the piperazine ring to the benzimidazole position with a 1:1 guest-host ratio and (ii) a second Q[7] onto the ethyl position with a 1:2 guest-host stoichiometry. This stimulus response system will have potential applications in the field of molecular switch design.
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Affiliation(s)
- Qin Wang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China.
| | - Li-Bing Lü
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China.
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China.
| | - Tao Sun
- Key Laboratory of Guizhou High Performance Computational Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China.
| | - Qing Tang
- Department College of Tobacco Science, Guizhou University, Guiyang 550025, China.
| | - Ying Huang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China; The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang 550025, China.
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15
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Quan J, Zhang X, Ding Y, Li S, Qiu Y, Wang R, Zhou X. Cucurbit[7]uril as a Broad-Spectrum Antiviral Agent against Diverse RNA Viruses. Virol Sin 2021; 36:1165-1176. [PMID: 34037947 DOI: 10.1007/s12250-021-00404-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 04/06/2021] [Indexed: 11/27/2022] Open
Abstract
The emergence and re-emergence of RNA virus outbreaks highlight the urgent need for the development of broad-spectrum antivirals. Polyamines are positively-charged small molecules required for the infectivity of a wide range of RNA viruses, therefore may become good antiviral targets. Cucurbit[7]uril (CB[7]), a synthetic macrocyclic molecule, which can bind with amine-based organic compounds with high affinity, has been shown to regulate bioactive molecules through competitive binding. In this study, we tested the antiviral activity of CB[7] against diverse RNA viruses, including a panel of enteroviruses (i.e. human enterovirus A71, coxsackievirus A16, coxsackievirus B3, and echovirus 11), some flaviviruses (i.e. dengue virus and Zika virus), and an alphavirus representative Semliki forest virus. CB[7] can inhibit virus replications in a variety of cell lines, and its mechanism of action is through the competitive binding with polyamines. Our findings not only for the first time provide evidence that CB[7] can be a promising broad-spectrum antiviral agent, but more importantly, offer a novel therapeutic strategy to fight against RNA viruses by supramolecular sequestration of polyamines.
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Affiliation(s)
- Jia Quan
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xiangjun Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Yuanfu Ding
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Shengke Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Yang Qiu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China.
| | - Xi Zhou
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China.
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, 430071, China.
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16
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Huang X, Zhou H, Jiao R, Liu H, Qin C, Xu L, Chen Y. Supramolecular Chemotherapy: Host-Guest Complexes of Heptaplatin-Cucurbit[7]uril toward Colorectal Normal and Tumor Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5475-5482. [PMID: 33913723 DOI: 10.1021/acs.langmuir.0c03603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Supramolecular chemotherapy is a strategy that is currently used to improve the therapeutic efficacy of traditional chemotherapy while mitigating side effects. Heptaplatin, a platinum chemotherapeutic antitumor drug in colorectal tumors, is traditionally used in the clinic. However, its side effects and low efficiency in killing tumors remain unresolved. Herein, a facile supramolecular chemotherapy platform on account of the host-guest chemistry between cucurbit[7]uril and the commercially available heptaplatin was studied. At pH 7.4, heptaplatin showed a strong binding to the cucurbit[7]uril nanocarrier by 1H NMR, whose Ka was (1.38 ± 0.06) × 106 M-1 by isothermal titration calorimetry (ITC). At pH 6.0 in a tumor microenvironment, overexpressed spermine can exchange competitively heptaplatin from heptaplatin-CB[7]. This supramolecular complex achieved higher antitumor activity on colorectal tumor cells and lower cytotoxicity than the drug alone on colorectal normal cells. Furthermore, the antitumor mechanisms of supramolecular complex were investigated by apoptosis, cell cycle, and spermine synthase. It was found that heptaplatin-CB[7] consumed more colorectal tumorous intracellular spermine by the spermine synthase assay (413.85 ± 0.004 pg/mL); hepataplatin-CB[7] caused early apoptosis (87.73%) of colorectal tumor cells; heptaplatin-CB[7] induced an inhibitory response in the G1 phase of the tumor cell cycle. These findings demonstrated that heptaplatin-CB[7] had higher antitumor activity toward human colorectal tumor cells but lower cytotoxicity toward human colorectal normal cells. It is expected to promote the supramolecular chemotherapy and translational development of the nanocomplex into the clinical field.
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Affiliation(s)
- Xin Huang
- Beijing Key Laboratory of Environmental Toxicology, Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing 100069, PR China
| | - Hang Zhou
- Beijing Key Laboratory of Environmental Toxicology, Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing 100069, PR China
| | - Rong Jiao
- Beijing Key Laboratory of Environmental Toxicology, Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing 100069, PR China
| | - Hanrui Liu
- Beijing Key Laboratory of Environmental Toxicology, Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing 100069, PR China
| | - Changfu Qin
- Department of Hernia and Abdominal Wall Surgery, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100043, PR China
| | - Lixin Xu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing 100053, PR China
| | - Yueyue Chen
- Beijing Key Laboratory of Environmental Toxicology, Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing 100069, PR China
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17
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Pandya JB, Patel PD, Shinde SM, Jha PK. Interpreting the nature of interactions in the inclusion complex of danofloxacin, a third-generation fluoroquinolone with Cucurbit[7]uril: A computational study. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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18
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Soni SS, Alsasa A, Rodell CB. Applications of Macrocyclic Host Molecules in Immune Modulation and Therapeutic Delivery. Front Chem 2021; 9:658548. [PMID: 33889565 PMCID: PMC8055865 DOI: 10.3389/fchem.2021.658548] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/12/2021] [Indexed: 12/17/2022] Open
Abstract
The immune system plays a central role in the development and progression of human disease. Modulation of the immune response is therefore a critical therapeutic target that enables us to approach some of the most vexing problems in medicine today such as obesity, cancer, viral infection, and autoimmunity. Methods of manipulating the immune system through therapeutic delivery centralize around two common themes: the local delivery of biomaterials to affect the surrounding tissue or the systemic delivery of soluble material systems, often aided by context-specific cell or tissue targeting strategies. In either case, supramolecular interactions enable control of biomaterial composition, structure, and behavior at the molecular-scale; through rational biomaterial design, the realization of next-generation immunotherapeutics and immunotheranostics is therefore made possible. This brief review highlights methods of harnessing macromolecular interaction for immunotherapeutic applications, with an emphasis on modes of drug delivery.
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Affiliation(s)
| | | | - Christopher B. Rodell
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA, United States
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19
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Dračínský M, Hurtado CS, Masson E, Kaleta J. Stuffed pumpkins: mechanochemical synthesis of host-guest complexes with cucurbit[7]uril. Chem Commun (Camb) 2021; 57:2132-2135. [PMID: 33605291 DOI: 10.1039/d1cc00240f] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Solvent-free mechanochemical synthesis (ball-milling) was used to prepare inclusion complexes with cucurbit[7]uril and four model guest molecules (adamantane, adamantyl-1-amine hydrochloride, toluidine hydrochloride, and p-phenylenediamine dihydrochloride). Successful formation of individual inclusions was independently confirmed by one- and two-dimensional solid-state NMR techniques and differential scanning calorimetry. Mechanochemical synthesis represents an alternative path towards new types of cucurbit[n]uril/guest inclusion complexes that are not accessible due to limited solubility of the individual components.
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Affiliation(s)
- Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic.
| | - Carina Santos Hurtado
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic.
| | - Eric Masson
- Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA
| | - Jiří Kaleta
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 160 00 Prague 6, Czech Republic.
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20
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Polysaccharide-based supramolecular drug delivery systems mediated via host-guest interactions of cucurbiturils. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.08.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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21
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Li S, Kuok KI, Ji X, Xu A, Yin H, Zheng J, Tan H, Wang R. Supramolecular Modulation of Antibacterial Activity of Ambroxol by Cucurbit[7]uril. Chempluschem 2021; 85:679-683. [PMID: 32253831 DOI: 10.1002/cplu.202000119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/24/2020] [Indexed: 12/14/2022]
Abstract
Supramolecular encapsulation by cucurbit[7]uril (CB[7]) was recently demonstrated to provide a simple and efficient method for antibacterial activity regulation of antibiotics. In this work, CB[7] was shown to form binary host-guest complex with ambroxol hydrochloride (ABX), a clinical mucokinetic and expectorant drug, which was reported to exhibit certain antibacterial activity. 1 H NMR titration and isothermal titration calorimetry experiment results suggested that the 4-hydroxyl cyclohexylamine group of ABX was included inside the CB[7] cavity, with a binding constant Ka of (6.69±0.11)×105 M-1 in phosphate buffered saline (PBS) solution, thermodynamically driven by both enthalpy change (ΔH=-12.2 kJ/mol) and entropy change (TΔS=21.1 kJ/mol). More importantly, ABX's inhibitory activity (MIC50 ) against bacillary strains towards Pseudomonas aeruginosa and Escherichia coli strains was decreased from (5.11±0.31)×10-6 M-1 and (2.63±0.34)×10-5 M-1 to zero upon encapsulation by CB[7], and was subsequently recovered to almost its original activity when a competitive guest, amantadine hydrochloride, for disassembling CB[7]-ABX complex, was added, suggesting that the antibacterial activity of ABX could be readily "turned off/on" upon its complexation and decomplexation with CB[7].
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Affiliation(s)
- Shengke Li
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Kit Ieng Kuok
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, 999078, Macau, P. R. China
| | - Xia Ji
- Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, 999078, Macau, P. R. China
| | - Anni Xu
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Hang Yin
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, 999078, Macau, P. R. China
| | - Jun Zheng
- Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, 999078, Macau, P. R. China
| | - Huaping Tan
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, 999078, Macau, P. R. China
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22
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Li XX, Xu WT, Deng XY, Tian LF, Huang Y, Tao Z. Selective Identification of Phenylalanine Using Cucurbit[7,8]uril-Based Fluorescent Probes. Aust J Chem 2021. [DOI: 10.1071/ch20029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The interactions of two host–guest inclusion complexes comprised of cucurbit[7]uril (Q[7]) and cucurbit[8]uril (Q[8]) with a derivative of toluidine blue O (TB) have been investigated using 1H NMR and fluorescence spectroscopy. The experimental results revealed that the Q[7] host interacts with a TB molecule to form a 1:1 inclusion complex and the Q[8] host interacts with two TB guest molecules to form a 1:2 inclusion complex. The inclusion of the TB guest molecule within the Q[7] host gave rise to significant fluorescence enhancement, whereas the inclusion of the TB guest molecule within the Q[8] host resulted in significant fluorescence quenching. Further recognition experiments involving a series of l-α-amino acids revealed that the TB@Q[7] inclusion fluorescence probe exhibits high selectivity for the recognition of phenylalanine via significant fluorescence quenching in an aqueous solution, whereas the TB@Q[8] inclusion fluorescence probe also exhibited high selectivity for phenylalanine recognition via fluorescence enhancement in an aqueous solution.
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23
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Supramolecular nano drug delivery systems mediated via host-guest chemistry of cucurbit[n]uril (n = 6 and 7). CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.04.049] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Feng H, Luo Y, Liu M, Chen Q, Tao Z, Xiao X. A facile cucurbit[8]uril-based porous assembly: utilization in the adsorption of drugs and their controlled release. NEW J CHEM 2021. [DOI: 10.1039/d1nj04749c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Cucurbit[n]urils (Q[n]s) are essential members of the supramolecular organic framework family owing to their distinct structure.
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Affiliation(s)
- Huaming Feng
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Yang Luo
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Ming Liu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Qing Chen
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
| | - Xin Xiao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, 550025, China
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25
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Liu Y, Zhang Y, Yu H, Liu Y. Cucurbituril‐Based Biomacromolecular Assemblies. Angew Chem Int Ed Engl 2020; 60:3870-3880. [DOI: 10.1002/anie.202009797] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Indexed: 12/29/2022]
Affiliation(s)
- Yao‐Hua Liu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Ying‐Ming Zhang
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Hua‐Jiang Yu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Yu Liu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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26
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Affiliation(s)
- Yao‐Hua Liu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Ying‐Ming Zhang
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Hua‐Jiang Yu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
| | - Yu Liu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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27
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Chernikova EY, Berdnikova DV. Cucurbiturils in nucleic acids research. Chem Commun (Camb) 2020; 56:15360-15376. [PMID: 33206072 DOI: 10.1039/d0cc06583h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
During the past ten years, the importance of cucurbiturils (CB[n]) as macrocyclic hosts in supramolecular assemblies with various types of natural and synthetic nucleic acids (NAs) has increased explosively. As a component of such systems, CB[n] macrocycles can play a wide spectrum of roles from drug and gene delivery vehicles to catalysts/inhibitors of biochemical reactions and even building blocks for NA-based materials. The aim of this highlight article is to describe the development of the CB[n] applications in nucleic acids research and to outline the current situation and perspectives of this fascinating synergistic combination of supramolecular chemistry of CB[n] and NAs.
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Affiliation(s)
- Ekaterina Y Chernikova
- Laboratory of Photoactive Supramolecular Systems, A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, Russia.
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Cheng G, Luo J, Liu Y, Chen X, Wu Z, Chen T. Cucurbituril-Oriented Nanoplatforms in Biomedical Applications. ACS APPLIED BIO MATERIALS 2020; 3:8211-8240. [PMID: 35019600 DOI: 10.1021/acsabm.0c01061] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cucucrbituril (CB) belongs to a family of macrocycles that are easily accessible. Their structural specificity provides excellent molecular recognition capabilities, with the ability to be readily chemically modified. Because of these properties, researchers have found CB to be a useful molecular carrier for delivering drug molecules and therapeutic biomolecules. Their significance lies in the fact that CB not only increases the solubility and stability of an encapsulated guest but also provides the possibility to achieve targeted delivery of the guest molecule. Therefore, the emergence of CB undoubtedly provides opportunities for the development of targeted drug delivery in an era where intelligent drugs have attracted considerable attention. It has also been found that CB can enhance fluorescent dyes, allowing the preparation of biosensors with enhanced sensitivity for use in clinical settings. In the present review, the acquisition, properties, and structural modifications of CB are first comprehensively described, and then the value of this macrocycle in applications within the medical field is discussed. In addition, we have also summarized patent applications of CB in this field over recent years, aiming to illustrate the current status of developments of this molecule. Finally, we discuss the challenges faced by CB in the medical field and future trends in its development.
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Affiliation(s)
- Guowang Cheng
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Jingshan Luo
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Yao Liu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Xiaojia Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Zhenfeng Wu
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Tongkai Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
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Ai Q, Fu Q, Liang F. pH-Mediated Single Molecule Conductance of Cucurbit[7]uril. Front Chem 2020; 8:736. [PMID: 33195012 PMCID: PMC7477741 DOI: 10.3389/fchem.2020.00736] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/16/2020] [Indexed: 11/13/2022] Open
Abstract
Recognition tunneling technique owns the capability for investigating and characterizing molecules at single molecule level. Here, we investigated the conductance value of cucurbit[7]uril (CB[7]) and melphalan@CB[7] (Mel@CB[7]) complex molecular junctions by using recognition tunneling technique. The conductances of CB[7] and Mel@CB[7] with different pH values were studied in aqueous media as well as organic solvent. Both pH value and guest molecule have an impact on the conductance of CB[7] molecular junction. The conductances of CB[7] and Mel@CB[7] both showed slightly difference on the conductance under different measurement systems. This work extends the molecular conductance measurement to aqueous media and provides new insights of pH-responsive host-guest system for single molecule detection through electrical measurements.
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Affiliation(s)
- Qiushuang Ai
- The State Key Laboratory for Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, China
| | - Qiang Fu
- Jiangxi College of Traditional Chinese Medicine, Fuzhou, China
| | - Feng Liang
- The State Key Laboratory for Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, China
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30
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Chandra F, Dutta T, Koner AL. Supramolecular Encapsulation of a Neurotransmitter Serotonin by Cucurbit[7]uril. Front Chem 2020; 8:582757. [PMID: 33195072 PMCID: PMC7645158 DOI: 10.3389/fchem.2020.582757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/16/2020] [Indexed: 12/22/2022] Open
Abstract
pH-dependent host-guest complexation of a monoamine neurotransmitter, Serotonin, with cucurbit[7]uril has been thoroughly investigated. The binding phenomena were explored using steady-state and time-resolved fluorescence spectroscopy at different pH values. At lower pH, i.e., protonated Serotonin, the binding affinity with cucurbit[7]uril was significantly higher compared to higher pH. Furthermore, detailed NMR titration experiments depicted the solution structure of the host-guest complex through the complexation induced chemical shift values. A competitive binding assay with cesium ions at pD 2.8 was subsequently performed for the further manifestation of the binding. Finally, the molecular docking studies provided well-documented proof of the 1:1 inclusion complex and the geometry of the complex. We believe that understanding from such studies can be important for pH-controlled delivery of serotonin for biological applications.
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Affiliation(s)
- Falguni Chandra
- Bionanotechnology Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Tanoy Dutta
- Bionanotechnology Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Apurba L Koner
- Bionanotechnology Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, India
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Yahiaoui K, Seridi L, Mansouri K. Temozolomide binding to Cucurbit[7]uril: QTAIM, NCI-RDG and NBO analyses. J INCL PHENOM MACRO 2020. [DOI: 10.1007/s10847-020-01027-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Tabet A, Gebhart T, Wu G, Readman C, Pierson Smela M, Rana VK, Baker C, Bulstrode H, Anikeeva P, Rowitch DH, Scherman OA. Applying support-vector machine learning algorithms toward predicting host-guest interactions with cucurbit[7]uril. Phys Chem Chem Phys 2020; 22:14976-14982. [PMID: 32588846 DOI: 10.1039/c9cp05800a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Machine learning is a valuable tool in the development of chemical technologies but its applications into supramolecular chemistry have been limited. Here, the utility of kernel-based support vector machine learning using density functional theory calculations as training data is evaluated when used to predict equilibrium binding coefficients of small molecules with cucurbit[7]uril (CB[7]). We find that utilising SVMs may confer some predictive ability. This algorithm was then used to predict the binding of drugs TAK-580 and selumetinib. The algorithm did predict strong binding for TAK-580 and poor binding for selumetinib, and these results were experimentally validated. It was discovered that the larger homologue cucurbit[8]uril (CB[8]) is partial to selumetinib, suggesting an opportunity for tunable release by introducing different concentrations of CB[7] or CB[8] into a hydrogel depot. We qualitatively demonstrated that these drugs may have utility in combination against gliomas. Finally, mass transfer simulations show CB[7] can independently tune the release of TAK-580 without affecting selumetinib. This work gives specific evidence that a machine learning approach to recognition of small molecules by macrocycles has merit and reinforces the view that machine learning may prove valuable in the development of drug delivery systems and supramolecular chemistry more broadly.
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Affiliation(s)
- Anthony Tabet
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK.
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Maikawa CL, Smith AAA, Zou L, Roth GA, Gale EC, Stapleton LM, Baker SW, Mann JL, Yu AC, Correa S, Grosskopf AK, Liong CS, Meis CM, Chan D, Troxell M, Maahs DM, Buckingham BA, Webber MJ, Appel EA. A co-formulation of supramolecularly stabilized insulin and pramlintide enhances mealtime glucagon suppression in diabetic pigs. Nat Biomed Eng 2020; 4:507-517. [PMID: 32393892 PMCID: PMC7274092 DOI: 10.1038/s41551-020-0555-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 04/03/2020] [Indexed: 02/06/2023]
Abstract
Treatment of patients with diabetes with insulin and pramlintide (an amylin analogue) is more effective than treatment with insulin only. However, because mixtures of insulin and pramlintide are unstable and have to be injected separately, amylin analogues are only used by 1.5% of people with diabetes needing rapid-acting insulin. Here, we show that the supramolecular modification of insulin and pramlintide with cucurbit[7]uril-conjugated polyethylene glycol improves the pharmacokinetics of the dual-hormone therapy and enhances postprandial glucagon suppression in diabetic pigs. The co-formulation is stable for over 100 h at 37 °C under continuous agitation, whereas commercial formulations of insulin analogues aggregate after 10 h under similar conditions. In diabetic rats, the administration of the stabilized co-formulation increased the area-of-overlap ratio of the pharmacokinetic curves of pramlintide and insulin from 0.4 ± 0.2 to 0.7 ± 0.1 (mean ± s.d.) for the separate administration of the hormones. The co-administration of supramolecularly stabilized insulin and pramlintide better mimics the endogenous kinetics of co-secreted insulin and amylin, and holds promise as a dual-hormone replacement therapy.
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Affiliation(s)
- Caitlin L Maikawa
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Anton A A Smith
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
- Department of Science and Technology, Aarhus University, Aarhus, Denmark
| | - Lei Zou
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Gillie A Roth
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Emily C Gale
- Department of Biochemistry, Stanford University, Stanford, CA, USA
| | | | - Sam W Baker
- Department of Comparative Medicine, Stanford University, Stanford, CA, USA
| | - Joseph L Mann
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Anthony C Yu
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Santiago Correa
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | | | - Celine S Liong
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Catherine M Meis
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Doreen Chan
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | - Megan Troxell
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - David M Maahs
- Department of Pediatrics (Endocrinology), Stanford University, Stanford, CA, USA
- Diabetes Research Center, Stanford University, Stanford, CA, USA
| | - Bruce A Buckingham
- Department of Pediatrics (Endocrinology), Stanford University, Stanford, CA, USA
- Diabetes Research Center, Stanford University, Stanford, CA, USA
| | - Matthew J Webber
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA
| | - Eric A Appel
- Department of Bioengineering, Stanford University, Stanford, CA, USA.
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
- Department of Pediatrics (Endocrinology), Stanford University, Stanford, CA, USA.
- Diabetes Research Center, Stanford University, Stanford, CA, USA.
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Gao Y, Yang X, Wang Z, Zhong Z, Hu Y, Wang Y. Supramolecular Nano-Encapsulation of Anabasine Reduced Its Developmental Toxicity in Zebrafish. Front Chem 2020; 8:134. [PMID: 32185162 PMCID: PMC7058803 DOI: 10.3389/fchem.2020.00134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 02/13/2020] [Indexed: 11/25/2022] Open
Abstract
Anabasine (ANA), a major piperidine alkaloid originally isolated from wild tobacco trees (Nicotiana glauca), has been known to induce serious developmental toxicities such as skeletal deformities in livestock and humans. In this study, we thoroughly investigated the supramolecular nano-encapsulations of ANA by an artificial nanocontainer, cucurbit[7] uril (CB[7]), and examined the influences of the nano-encapsulation on ANA's inherent developmental toxicities on a zebrafish model. We have shown that CB[7] formed 1:1 host-guest inclusion complexes with ANA via a relatively high binding strength [Ka of (7.45 ± 0.31) × 104 M−1] in an aqueous solution, via UV-vis and 1H nuclear magnetic resonance spectroscopic titrations, as well as isothermal titration calorimetry titration. As a consequence, CB[7] significantly attenuated the developmental toxicity of ANA on zebrafish in vivo. In contrast, for a comparative purpose, β-CD didn't exert any influence on the toxicity of ANA due to its weak binding with ANA, which was not even measurable via either spectroscopic methods or ITC titration. This is the first head-to-head comparison of this pair of nanocontainers, CB[7] and β-CD, on their potential roles in influencing the toxicity of guest molecules and the results suggested that CB[7] could become a more promising functional excipient for reducing the inherent toxicities of active pharmaceutical ingredients, particularly alkaloids that may form relatively strong host-guest binding species with the host.
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Affiliation(s)
- Yan Gao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Xue Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Ziyi Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Zhangfeng Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yuanjia Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
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Assaf KI, Abed Alfattah H, Eftaiha AF, Bardaweel SK, Alnajjar MA, Alsoubani FA, Qaroush AK, El-Barghouthi MI, Nau WM. Encapsulation of ionic liquids inside cucurbiturils. Org Biomol Chem 2020; 18:2120-2128. [PMID: 32129437 DOI: 10.1039/d0ob00001a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cucurbit[n]urils (CBn, n = 6-8) serve as molecular receptors for imidazolium-based ionic liquids (ILs) in aqueous solution. The amphiphilic nature of 1-alkyl-3-methylimidazolium guests (Cnmim), with a cationic imidazolium residue and a hydrophobic alkyl chain, enabled their complexation with CBn through a combination of the hydrophobic effect and ion-dipole interactions. 1H NMR experiments revealed that the cavity of CBn can host the hydrophobic chain of the ILs, while one of the carbonyl rims served as a docking site for the imidazolium ring. The structure of the complexes was further analyzed by molecular dynamics (MD) simulations, which indicated that the cavity of CB6 can accommodate up to 5 carbon atoms, while the larger cavity of CB7 and CB8 can encapsulate longer alkyl chains in folded conformations. Isothermal titration calorimetry (ITC) experiments provided up to micromolar affinity of ILs to CBn in aqueous solution, which was independently quantified by indicator displacement titrations.
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Affiliation(s)
- Khaleel I Assaf
- Department of Chemistry, Al-Balqa Applied University, Al-Salt 19117, Jordan.
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Chernikova EY, Ruleva AY, Tsvetkov VB, Fedorov YV, Novikov VV, Aliyeu TM, Pavlov AA, Shepel NE, Fedorova OA. Cucurbit[7]uril-driven modulation of ligand-DNA interactions by ternary assembly. Org Biomol Chem 2020; 18:755-766. [PMID: 31912862 DOI: 10.1039/c9ob02543j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design of small organic molecules with a predictable and desirable DNA-binding mechanism is a topical research task for biomedicine application. Herein, we demonstrate an attractive supramolecular strategy for controlling the non-covalent ligand-DNA interaction by binding with cucurbituril as a synthetic receptor. With a combination of UV/vis, CD and NMR experiments, we demonstrate that the bis-styryl dye with two suitable binding sites can involve double stranded DNA and cucurbituril in the formation of the supramolecular triad. The ternary assembly is formed as a result of the interaction of macrocyclic cucurbituril with one pyridinium fragment of the bis-styryl dye, while the second pyridinium fragment of the dye is effectively associated with DNA backbones, which leads to a change in the ligand-DNA binding mode from aggregation to a minor groove. This exciting outcome was supported by molecular docking studies that help to understand the molecular orientation of the supramolecular triad and elucidate the destruction of dye aggregates caused by cucurbituril. These studies provide valuable information on the mechanisms of DNA binding to small molecules and recognition processes in bioorganic supramolecular assemblies constructed from multiple non-covalent interactions.
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Affiliation(s)
- Ekaterina Y Chernikova
- Laboratory of Photoactive Supramolecular Systems, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia.
| | - Anna Y Ruleva
- Laboratory of Photoactive Supramolecular Systems, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia.
| | - Vladimir B Tsvetkov
- Computational Oncology Group, I.M. Sechenov First Moscow State Medical University, Trubetskaya str, 8/2, Moscow, 119146 Russia and Biophysics Department, Research and Clinical Center for Physical Chemical Medicine, Malaya Pirogovskaya str. 1a, Moscow 119435, Russia and Polyelectrolytes and Biomedical Polymers Laboratory, A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prospect str. 29, Moscow, 119991, Russia
| | - Yuri V Fedorov
- Laboratory of Photoactive Supramolecular Systems, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia.
| | - Valentin V Novikov
- Laboratory of Nuclear Magnetic Resonances, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia
| | - Tseimur M Aliyeu
- Center for Molecule Composition Studies, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia
| | - Alexander A Pavlov
- Laboratory of Nuclear Magnetic Resonances, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia
| | - Nikolay E Shepel
- Laboratory of Photoactive Supramolecular Systems, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia.
| | - Olga A Fedorova
- Laboratory of Photoactive Supramolecular Systems, A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova St. 28, Moscow, 119991, Russia.
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Rondon A, Degoul F. Antibody Pretargeting Based on Bioorthogonal Click Chemistry for Cancer Imaging and Targeted Radionuclide Therapy. Bioconjug Chem 2020; 31:159-173. [PMID: 31855602 DOI: 10.1021/acs.bioconjchem.9b00761] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bioorthogonal click chemistry-employing antibody-conjugated trans-cyclooctenes (TCO) and tetrazine (Tz)-based radioligands able to covalently bind in vivo-appeared recently as a potential alternative to circumvent the hematotoxicity induced by radioimmunotherapy of solid tumors. This Review focuses on the recent advances concerning TCO/Tz pretargeting in both cancer imaging and targeted-radionuclide therapy for prospective clinical transfer. We exhaustively identified 25 PubMed publications reporting preclinical imaging and 5 therapy studies with full mAbs as targeting vectors, since its first application in 2010. The fast, safe, modulable, and specific TCO/Tz pretargeting showed high potential as a theranostic tool to get more personalized and precise cancer care. The recent optimizations reported here highlighted a possible first clinical evaluation of IEDDA pretargeting in the coming years.
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Affiliation(s)
- Aurélie Rondon
- Université Clermont Auvergne , Imagerie Moléculaire et Stratégies Théranostiques , BP 184, F-63005 Clermont-Ferrand , France.,Inserm, U 1240 , F-63000 Clermont-Ferrand , France.,Centre Jean Perrin , F-63011 Clermont-Ferrand , France
| | - Françoise Degoul
- Université Clermont Auvergne , Imagerie Moléculaire et Stratégies Théranostiques , BP 184, F-63005 Clermont-Ferrand , France.,Inserm, U 1240 , F-63000 Clermont-Ferrand , France.,Centre Jean Perrin , F-63011 Clermont-Ferrand , France
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Moussa YE, Venkataramanan NS, Wheate NJ. Demonstration of the first known 1:2 host-guest encapsulation of a platinum anticancer complex within a macrocycle. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-019-00960-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Prakash R, Usha G, Karpagalakshmi K, Ramalakshmi S, Piramuthu L, Yang C, Selvapalam N. Vitamin B1 Sensor at Neutral pH and Improvement by Cucurbit[7]uril. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ramesh Prakash
- Center for Supramolecular Chemistry and Department of Chemistry, International Research Center, Kalasalingam Academy of Research and Education (Kalasalingam University), Krishnankoil, Tamil Nadu State 626-126, India
| | - Govindaraj Usha
- Center for Supramolecular Chemistry and Department of Chemistry, International Research Center, Kalasalingam Academy of Research and Education (Kalasalingam University), Krishnankoil, Tamil Nadu State 626-126, India
| | - Karuppasamy Karpagalakshmi
- Center for Supramolecular Chemistry and Department of Chemistry, International Research Center, Kalasalingam Academy of Research and Education (Kalasalingam University), Krishnankoil, Tamil Nadu State 626-126, India
| | - Sundaram Ramalakshmi
- Center for Supramolecular Chemistry and Department of Chemistry, International Research Center, Kalasalingam Academy of Research and Education (Kalasalingam University), Krishnankoil, Tamil Nadu State 626-126, India
| | - Lakshminarayanan Piramuthu
- Center for Supramolecular Chemistry and Department of Chemistry, International Research Center, Kalasalingam Academy of Research and Education (Kalasalingam University), Krishnankoil, Tamil Nadu State 626-126, India
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, and Healthy Food Evaluation Research Center, Sichuan University, Chengdu 610-064, P. R. China
| | - Narayanan Selvapalam
- Center for Supramolecular Chemistry and Department of Chemistry, International Research Center, Kalasalingam Academy of Research and Education (Kalasalingam University), Krishnankoil, Tamil Nadu State 626-126, India
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40
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Das D, Assaf KI, Nau WM. Applications of Cucurbiturils in Medicinal Chemistry and Chemical Biology. Front Chem 2019; 7:619. [PMID: 31572710 PMCID: PMC6753627 DOI: 10.3389/fchem.2019.00619] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 08/28/2019] [Indexed: 02/02/2023] Open
Abstract
The supramolecular chemistry of cucurbit[n]urils (CBn) has been rapidly developing to encompass diverse medicinal applications, including drug formulation and delivery, controlled drug release, and sensing for bioanalytical purposes. This is made possible by their unique recognition properties and very low cytotoxicity. In this review, we summarize the host-guest complexation of biologically important molecules with CBn, and highlight their implementation in medicinal chemistry and chemical biology.
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Affiliation(s)
- Debapratim Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India
| | - Khaleel I. Assaf
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Bremen, Germany
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, Al-Salt, Jordan
| | - Werner M. Nau
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Bremen, Germany
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41
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Applications of macrocyclic compounds for electrochemical sensors to improve selectivity and sensitivity. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-019-00934-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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42
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Tang Q, Wang C, Xi Y, Huang Y, Tao Z. Host‐Guest Complexes of
l
‐Borneol with Cucurbituril and Cyclodextrin and Its Potential Use in Analysis of Drugs. ChemistrySelect 2019. [DOI: 10.1002/slct.201900913] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qing Tang
- Department College of Tobacco ScienceGuizhou University Guiyang 550025 (P. R. China
- Key Laboratory of TobaccoQuality in Guizhou Province Guiyang 550025 (P. R. China
| | - Cheng‐Hui Wang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guiyang 550025 (P. R. China
| | - Yun‐Yun Xi
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guiyang 550025 (P. R. China
| | - Ying Huang
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of NationalEducation Ministry of China Guizhou University Guiyang 550025 (P. R. China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guiyang 550025 (P. R. China
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Liu Y, Zhou F, Yang F, Ma D. Carboxylated pillar[n]arene (n = 5-7) host molecules: high affinity and selective binding in water. Org Biomol Chem 2019; 17:5106-5111. [PMID: 31070210 DOI: 10.1039/c9ob00684b] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Water-soluble carboxylated pillar[n]arenes (n = 5-7) or WPns were discovered to be high affinity host molecules with selective binding for different guests based on a systematic investigation. We chose 22 dyes or guests and determined the value of Ka for 51 supramolecular complexes. It was discovered that the electrostatic interactions, π-π stacking and hydrophobic effect were the driving force for high affinity supramolecular encapsulation. WPns had selective binding toward suitable guests based on their sizes and molecular structures. Based on the above discovery, a guest (guest 21) was designed, which bound with WP7 3.3-fold tighter compared to methyl viologen.
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Affiliation(s)
- Yamin Liu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China.
| | - Fang Zhou
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China.
| | - Fan Yang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China.
| | - Da Ma
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China.
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Xiao T, Zhong W, Xu L, Sun XQ, Hu XY, Wang L. Supramolecular vesicles based on pillar[n]arenes: design, construction, and applications. Org Biomol Chem 2019; 17:1336-1350. [PMID: 30638249 DOI: 10.1039/c8ob03095b] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Supramolecular vesicles have attracted considerable attention due to their advantages of facile construction, high-cargo-loading capacity, and good biocompatibility. Pillar[n]arenes are a unique family of supramolecular macrocycles, exhibiting excellent features and broad applications due to their intrinsic topology and high functionality. In the past decade, the construction of pillar[n]arene-based supramolecular vesicles has been continuously attempted and developed rapidly. In this review, we mainly summarize the significant advancements of such supramolecular vesicles in the last three years. By showing some representative examples, the design strategies, construction methods, and potential applications of these dynamic nanocarriers are discussed in detail. In particular, the responsiveness of such vesicles to various external stimuli and their applications in drug delivery are highlighted. The outstanding performance of pillar[n]arene-based supramolecular vesicles would definitely enrich the family of supramolecular vesicles and promote the development of dynamic supramolecular materials.
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Affiliation(s)
- Tangxin Xiao
- School of Petrochemical Engineering, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, 213164, China.
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45
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Cheng Q, Yin H, Rosas R, Gigmes D, Ouari O, Wang R, Kermagoret A, Bardelang D. A pH-driven ring translocation switch against cancer cells. Chem Commun (Camb) 2019; 54:13825-13828. [PMID: 30462104 DOI: 10.1039/c8cc08681h] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A molecular switch built with cucurbit[7]uril and a 3-station viologen-phenylene-imidazole compound exhibited pH actuated ring translocation with high fatigue resistance (up to 102 cycles). The switch movement was harnessed toward selectively masking the toxicity of the viologen fragment at neutral pH near non-cancerous cells, while exposing it at acid pH near cancer cells.
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Affiliation(s)
- Qian Cheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, China.
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46
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Mao W, Mao D, Yang F, Ma D. Transformative Supramolecular Vesicles Based on Acid-Degradable Acyclic Cucurbit[n]uril and a Prodrug for Promoted Tumoral-Cell Uptake. Chemistry 2019; 25:2272-2280. [PMID: 30511775 DOI: 10.1002/chem.201804835] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/09/2018] [Indexed: 11/08/2022]
Abstract
Smart supramolecular vesicles constructed by host-guest interactions between "acid-degradable" acyclic cucurbit[n]uril (CB[n]) and a doxorubicin prodrug are reported. "Acid-degradable" acyclic CB[n] is a high-affinity host for several common antitumor drugs, and its degradation leads to a more dramatic decrease in binding affinity than that observed for "acid-sensitive" hosts. Supramolecular complexation between acid-degradable acyclic CB[n] and a doxorubicin prodrug resulted in the formation of negatively charged supramolecular vesicles. The prodrug strategy allowed doxorubicin to be conjugated to vesicles in a stable manner with a high drug-loading ratio of 20 %. The resulting supramolecular vesicles were responsive to tumor acidity (pH 6.5). Induced by mildly acidic conditions (pH 6.5-5.5), acid-degradable acyclic CB[n] could be degraded, and this led to a vesicle-to-micelle transition to form positively charged micelles. This transition resulted in a pH-dependent change in size and surface charge, which improved tumoral-cell uptake for doxorubicin.
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Affiliation(s)
- Weipeng Mao
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, P.R. China
| | - Dake Mao
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, P.R. China
| | - Fan Yang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, P.R. China
| | - Da Ma
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, P.R. China
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47
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Li CR, Feng HM, Zhao JY, Li Z, Bian B, Meng TH, Hu XY, Wang H, Xiao X. Supramolecular Interaction Between Cucurbit[8]uril and the Quinolone Antibiotic Ofloxacin. Aust J Chem 2019. [DOI: 10.1071/ch19341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The host–guest inclusion complex of cucurbit[8]uril (Q[8]) and ofloxacin (OFLX) has been prepared and characterised by means of 1H NMR spectroscopy, MALDI-TOF mass spectrometry, isothermal titration calorimetry (ITC), fluorescence spectroscopy, and UV-vis absorption spectroscopy. The findings demonstrated that a host–guest inclusion complex could be formed through an encapsulation of the methylmorpholine and piperazine rings in OFLX. ITC results indicated that the formation of this inclusion complex (1:1 molar ratio) was primarily dependent on enthalpy and entropy changes. In addition, the release of OFLX from the inclusion complex was increased under acidic conditions.
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48
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Miskolczy Z, Megyesi M, Toke O, Biczók L. Change of the kinetics of inclusion in cucurbit[7]uril upon hydrogenation and methylation of palmatine. Phys Chem Chem Phys 2019; 21:4912-4919. [DOI: 10.1039/c8cp07231k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The negative activation entropy of tetrahydropalmatine inclusion makes the entry into cucurbit[7]uril significantly slower than in the case of dehydrocorydaline.
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Affiliation(s)
- Zsombor Miskolczy
- Institute of Materials and Environmental Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
| | - Mónika Megyesi
- Institute of Materials and Environmental Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
| | - Orsolya Toke
- Laboratory for NMR Spectroscopy
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
| | - László Biczók
- Institute of Materials and Environmental Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
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49
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Xiao Z, Zhou Y, Xu W, Prior TJ, Bian B, Redshaw C, Tao Z, Xiao X. Study of the host–guest interaction between N,N′-bis[4-(dimethylaminophenyl)methyl]butane-1,4-diamine and the cucuribit[n]urils (n = 6, 7). NEW J CHEM 2019. [DOI: 10.1039/c9nj03254a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Interaction of the cucuribit[n]urils (n = 6 or 7) and the guest N,N′-bis[4-(dimethylaminophenyl)methyl]butane-1,4-diamine (G) has been studied in aqueous solution by 1H NMR and electronic absorption spectroscopy and Isothermal Titration Calorimetry.
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Affiliation(s)
- Zhiyou Xiao
- School of Chemical Engineering
- Guizhou Institute of Technology
- Guiyang 550003
- China
| | - Yang Zhou
- College of Chemistry
- Chemical Engineering and Materials Science
- Shandong Normal University
- Jinan 250014
- China
| | - Weitao Xu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
| | - Timothy J. Prior
- Department of Chemistry & Biochemistry
- University of Hull
- Hull HU6 7RX
- UK
| | - Bing Bian
- College of Chemistry and Environmental Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Carl Redshaw
- Department of Chemistry & Biochemistry
- University of Hull
- Hull HU6 7RX
- UK
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
| | - Xin Xiao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
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50
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Romano VJ, Macartney DH. Cucurbit[7]uril host-guest complexations of aza-, diaza-, and oxa, azaspirocycloalkanes in aqueous solution. Supramol Chem 2018. [DOI: 10.1080/10610278.2018.1562192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Vanessa J. Romano
- Department of Chemistry, Queen’s University, Kingston, Ontario, Canada
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