1
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Nguyen CT, Chow SKK, Nguyen HN, Liu T, Walls A, Withey S, Liebig P, Mueller M, Thierry B, Yang CT, Huang CJ. Formation of Zwitterionic and Self-Healable Hydrogels via Amino-yne Click Chemistry for Development of Cellular Scaffold and Tumor Spheroid Phantom for MRI. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36157-36167. [PMID: 38973633 PMCID: PMC11261563 DOI: 10.1021/acsami.4c06917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/21/2024] [Accepted: 07/01/2024] [Indexed: 07/09/2024]
Abstract
In situ-forming biocompatible hydrogels have great potential in various medical applications. Here, we introduce a pH-responsive, self-healable, and biocompatible hydrogel for cell scaffolds and the development of a tumor spheroid phantom for magnetic resonance imaging. The hydrogel (pMAD) was synthesized via amino-yne click chemistry between poly(2-methacryloyloxyethyl phosphorylcholine-co-2-aminoethylmethacrylamide) and dialkyne polyethylene glycol. Rheology analysis, compressive mechanical testing, and gravimetric analysis were employed to investigate the gelation time, mechanical properties, equilibrium swelling, and degradability of pMAD hydrogels. The reversible enamine and imine bond mechanisms leading to the sol-to-gel transition in acidic conditions (pH ≤ 5) were observed. The pMAD hydrogel demonstrated potential as a cellular scaffold, exhibiting high viability and NIH-3T3 fibroblast cell encapsulation under mild conditions (37 °C, pH 7.4). Additionally, the pMAD hydrogel also demonstrated the capability for in vitro magnetic resonance imaging of glioblastoma tumor spheroids based on the chemical exchange saturation transfer effect. Given its advantages, the pMAD hydrogel emerges as a promising material for diverse biomedical applications, including cell carriers, bioimaging, and therapeutic agent delivery.
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Affiliation(s)
- Cao Tuong
Vi Nguyen
- Department
of Chemical & Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Steven Kwok Keung Chow
- Clinical
Research and Imaging Centre, South Australian
Health and Medical Research Institute, Adelaide 5001, Australia
| | - Hoang Nam Nguyen
- Department
of Chemical & Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
| | - Tesi Liu
- Future
Industries Institute, University of South
Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia
| | - Angela Walls
- Clinical
Research and Imaging Centre, South Australian
Health and Medical Research Institute, Adelaide 5001, Australia
| | | | | | - Marco Mueller
- Advanced
Clinical Imaging Technology, Siemens Healthineers International AG, Lausanne 1000, Switzerland
| | - Benjamin Thierry
- Future
Industries Institute, University of South
Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia
| | - Chih-Tsung Yang
- Future
Industries Institute, University of South
Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia
| | - Chun-Jen Huang
- Department
of Chemical & Materials Engineering, National Central University, Jhong-Li, Taoyuan 320, Taiwan
- R&D
Center for Membrane Technology, Chung Yuan
Christian University, 200 Chung Pei Road, Chung-Li City 32023, Taiwan
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2
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Obydennov DL, Simbirtseva AE, Shirinkin AS, Kornev MY, Sosnovskikh VY. A novel strategy for the functionalization and design of 4-methylene-4 H-pyran merocyanines via enamination and 1,8-conjugate addition. Org Biomol Chem 2023; 21:600-620. [PMID: 36546541 DOI: 10.1039/d2ob01862d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
4-Methylene-4H-pyrans are popular merocyanine dyes, but their functionalization is limited by the Knoevenagel condensation with aromatic aldehydes. In this work, we developed a novel approach for the construction of a new class of pyran fluorophores based on enamination and subsequent nucleophilic substitution of the dimethylamino group via 1,8-conjugate addition/elimination. This methodology includes selective transformations leading to previously unknown symmetrical and asymmetrical structures. The dimethylaminovinyl-substituted pyrans are reactive intermediates and can be considered as a convenient synthetic tool for the construction of new merocyanines with tunable fluorescence (417-628 nm). The main strategies for the modification of the pyran moiety have been determined for the construction and targeted design of fluorophores. Pyrans bearing two enamine moieties demonstrate significant light extinction coefficients (up to 116 000 M-1 cm-1), high quantum yields (up to 69%) and large Stokes shifts (up to 152 nm) because of their strong push-pull nature. Density Functional Theory (DFT) calculations were performed for the explanation of the structural and photophysical features of the prepared merocyanines. The developed approach can be considered as a useful platform for further application of 4-methylene-4H-pyrans as promising fluorophores for sensors and solar cells, and in bioimaging.
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Affiliation(s)
- Dmitrii L Obydennov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation.
| | - Alena E Simbirtseva
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation.
| | - Alexander S Shirinkin
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation.
| | - Mikhail Y Kornev
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation.
| | - Vyacheslav Y Sosnovskikh
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation.
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3
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Fast E/Z UV-light response T-type photoswitching of phenylene-thienyl imines. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Iazzetti A, Mazzoccanti G, Bencivenni G, Righi P, Calcaterra A, Villani C, Ciogli A. Primary Amine Catalyzed Activation of Carbonyl Compounds: A Study on Reaction Pathways and Reactive Intermediates by Mass Spectrometry. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Antonia Iazzetti
- Department of Basic Biotechnological Sciences Intensivological and perioperative clinics Catholic University of Sacred Heart L. go F. Vito 1 00168 Rome Italy
| | - Giulia Mazzoccanti
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
| | - Giorgio Bencivenni
- Department of Industrial Chemistry “Toso Montanari” University of Bologna Viale del Risorgimento 4 40136 Bologna Italy
| | - Paolo Righi
- Department of Industrial Chemistry “Toso Montanari” University of Bologna Viale del Risorgimento 4 40136 Bologna Italy
| | - Andrea Calcaterra
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
| | - Claudio Villani
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
| | - Alessia Ciogli
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
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5
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Nakashima K, Petek A, Hori Y, Georgiev A, Hirashima SI, Matsushima Y, Yordanov D, Miura T, Antonov L. Acylhydrazone Subunits as a Proton Cargo Delivery System in 7-Hydroxyquinoline. Chemistry 2021; 27:11559-11566. [PMID: 34137094 DOI: 10.1002/chem.202101650] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Indexed: 12/13/2022]
Abstract
The reimagined concept of long-range tautomeric proton transfer using crane subunits is shown by designing and synthesising two new acylhydrazones containing a 7-hydroxyquinoline (7-OHQ) platform. The acylhydrazone subunits attached to the 7-OHQ at the 8th position act as crane arms for delivering proton cargo to the quinoline nitrogen. Light-induced tautomerization to their keto forms leads to Z/E isomerization of the C=C axle bond, followed by proton delivery to the quinoline nitrogen by the formation of covalent or hydrogen bonds. The axle's being either an imine or ketimine bond is the structural difference between the studied compounds. The -CH3 group in the latter provides steric strain, resulting in different proton transport pathways. Both compounds show long thermal stability in the switched state, which creates a tuneable action of bidirectional proton cargo transport by using different wavelengths of irradiation. Upon the addition of acid, the quinoline nitrogen is protonated; this results in E/Z configuration switching of the acylhydrazone subunits. This was proven by single-crystal X-ray structure analysis and NMR spectroscopy.
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Affiliation(s)
- Kosuke Nakashima
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Anton Petek
- Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Yutaro Hori
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Anton Georgiev
- Department of Organic Chemistry, University of Chemical Technology and Metallurgy, 8 St. Kliment Ohridski blvd, 1756, Sofia, Bulgaria.,Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Acad. G. Bonchev avenue, bldg. 109, 1113, Sofia, Bulgaria
| | - Shin-Ichi Hirashima
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yasuyuki Matsushima
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Dancho Yordanov
- Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee blvd, 1784, Sofia, Bulgaria.,Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev avenue, bldg. 9, Sofia, 1113, Bulgaria
| | - Tsuyoshi Miura
- Department of Pharmaceutical Chemistry, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Liudmil Antonov
- Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussee blvd, 1784, Sofia, Bulgaria
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Hansen PE. A Spectroscopic Overview of Intramolecular Hydrogen Bonds of NH…O,S,N Type. Molecules 2021; 26:2409. [PMID: 33919132 PMCID: PMC8122615 DOI: 10.3390/molecules26092409] [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: 01/04/2021] [Revised: 04/12/2021] [Accepted: 04/18/2021] [Indexed: 02/06/2023] Open
Abstract
Intramolecular NH…O,S,N interactions in non-tautomeric systems are reviewed in a broad range of compounds covering a variety of NH donors and hydrogen bond acceptors. 1H chemical shifts of NH donors are good tools to study intramolecular hydrogen bonding. However in some cases they have to be corrected for ring current effects. Deuterium isotope effects on 13C and 15N chemical shifts and primary isotope effects are usually used to judge the strength of hydrogen bonds. Primary isotope effects are investigated in a new range of magnitudes. Isotope ratios of NH stretching frequencies, νNH/ND, are revisited. Hydrogen bond energies are reviewed and two-bond deuterium isotope effects on 13C chemical shifts are investigated as a possible means of estimating hydrogen bond energies.
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Affiliation(s)
- Poul Erik Hansen
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
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7
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Ren Y, Kravchenko O, Ramström O. Configurational and Constitutional Dynamics of Enamine Molecular Switches. Chemistry 2020; 26:15654-15663. [PMID: 33044767 PMCID: PMC7756271 DOI: 10.1002/chem.202003478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Indexed: 12/11/2022]
Abstract
Dual configurational and constitutional dynamics in systems based on enamine molecular switches has been systematically studied. pH-responsive moieties, such as 2-pyridyl and 2-quinolinyl units, were required on the "stator" part, also providing enamine stability through intramolecular hydrogen-bonding (IMHB) effects. Upon protonation or deprotonation, forward and backward switching could be rapidly achieved. Extension of the stator π-system in the 2-quinolinyl derivative provided a higher E-isomeric equilibrium ratio under neutral conditions, pointing to a means to achieve quantitative forward/backward isomerization processes. The "rotor" part of the enamine switches exhibited constitutional exchange ability with primary amines. Interestingly, considerably higher exchange rates were observed with amines containing ester groups, indicating potential stabilization of the transition state through IMHB. Acids, particularly BiIII , were found to efficiently catalyze the constitutional dynamic processes. In contrast, the enamine and the formed dynamic enamine system showed excellent stability under basic conditions. This coupled configurational and constitutional dynamics expands the scope of dynamic C-C and C-N bonds and potentiates further studies and applications in the fields of molecular machinery and systems chemistry.
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Affiliation(s)
- Yansong Ren
- Department of ChemistryKTH—Royal Institute of TechnologyTeknikringen 3610044StockholmSweden
| | - Oleksandr Kravchenko
- Department of ChemistryKTH—Royal Institute of TechnologyTeknikringen 3610044StockholmSweden
| | - Olof Ramström
- Department of ChemistryKTH—Royal Institute of TechnologyTeknikringen 3610044StockholmSweden
- Department of ChemistryUniversity of Massachusetts LowellOne University Ave.LowellMA01854USA
- Department of Chemistry and Biomedical SciencesLinnaeus University39182KalmarSweden
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