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Loh WW, Lin Q, Zhao X, Su X, Loh XJ, Lim JYC. Polyurea-urethane Temperature-responsive Hydrogels for Sustained Delivery of Anti-VEGF Therapeutics. Chem Asian J 2024; 19:e202400453. [PMID: 38878271 DOI: 10.1002/asia.202400453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/09/2024] [Indexed: 07/26/2024]
Abstract
Temperature-responsive hydrogels, or thermogels, have emerged as a leading platform for sustained delivery of both small molecule drugs and macromolecular biologic therapeutics. Although thermogel properties can be modulated by varying the polymer's hydrophilic-hydrophobic balance, molecular weight and degree of branching, varying the supramolecular donor-acceptor interactions on the polymer remains surprisingly overlooked. Herein, to study the influence of enhanced hydrogen bonding on thermogelation, we synthesized a family of amphiphilic polymers containing urea and urethane linkages using quinuclidine as an organocatalyst. Our findings showed that the presence of strongly hydrogen bonding urea linkages significantly enhanced polymer hydration in water, in turn affecting hierarchical polymer self-assembly and macroscopic gel properties such as sol-gel phase transition temperature and gel stiffness. Additionally, analysis of the sustained release profiles of Aflibercept, an FDA-approved protein biologic for anti-angiogenic treatment, showed that urea bonds on the thermogel were able to significantly alter the drug release mechanism and kinetics compared to usage of polyurethane gels of similar composition and molecular weight. Our findings demonstrate the unrealized possibility of modulating gel properties and outcomes of sustained drug delivery through judicious variation of hydrogen bonding motifs on the polymer structure.
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Affiliation(s)
- Wei Wei Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR) #08-03, 2 Fusionopolis Way, Singapore, Singapore, 138634, Republic of Singapore
| | - Qianyu Lin
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR) #08-03, 2 Fusionopolis Way, Singapore, Singapore, 138634, Republic of Singapore
| | - Xinxin Zhao
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Dr, Proteos, Singapore, Singapore, 138673, Republic of Singapore
| | - Xinyi Su
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Dr, Proteos, Singapore, Singapore, 138673, Republic of Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, 10 Medical Dr, Singapore, 117597
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR) #08-03, 2 Fusionopolis Way, Singapore, Singapore, 138634, Republic of Singapore
- Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore, Singapore, 117576
| | - Jason Y C Lim
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR) #08-03, 2 Fusionopolis Way, Singapore, Singapore, 138634, Republic of Singapore
- Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore, Singapore, 117576
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Ramachandran M, Syed A, Marraiki N, Anandan S. The aqueous dependent sensing of hydrazine and phosphate anions using a bis-heteroleptic Ru(II) complex with a phthalimide-anchored pyridine-triazole ligand. Analyst 2021; 146:1430-1443. [PMID: 33410834 DOI: 10.1039/d0an02299c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective turn-on luminescence properties are shown by a non-luminescent metalloreceptor upon the addition of phosphate anions in CH3CN and hydrazine in CH3CN/H2O (6/4, v/v). The non-luminescent metalloreceptors [RuII(phen)2(TpH)]2PF6- (RtpH) and [RuII(Phen)2(TpI)]2PF6- (RtpI) {phen = 1,10-phenanthroline; TpH = 2-(2-(4-(pyridin-2-yl)-1H-1,2,3-triazol-1-yl)ethyl)isoindoline-1,3-dione; and TpI = 2-(2-(5-iodo-4-(pyridin-2-yl)-1H-1,2,3-triazol-1-yl)ethyl)isoindoline-1,3-dione} were synthesized and characterized. Both metalloreceptors have excellent sensing properties for phosphate anions (H2PO4- and H2P2O72-) over other anions in CH3CN. The limit of detection (LOD) values were calculated to be 79 nM and 48 nM for H2PO4- upon addition to RtpH and RtpI, respectively. Noncovalent interactions play a key role in the sensing of phosphate anions, among which the halogen-anion interaction showed superior recognition properties over the hydrogen-anion interaction. Comparative electrochemical experiments, 1H NMR titration, 31P NMR titration, and lifetime studies also show that RtpI has better sensing properties, as evidenced by its more drastic emission response to H2PO4- anions compared with RtpH. Moreover, the metalloreceptors showed a remarkable fluorescence increase (at ∼584 nm) upon the addition of hydrazine, without the interference of other amines in CH3CN/H2O (6/4, v/v). Interestingly, fluorescence enhancement was observed within live HeLa cells upon hydrazine addition, which is caused by the efficient photoinduced electron transfer process.
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Affiliation(s)
- Mohanraj Ramachandran
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India.
| | - Asad Syed
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Najat Marraiki
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sambandam Anandan
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India.
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Chung YK, Ha S, Woo TG, Kim YD, Song C, Kim SK. Binding thiourea derivatives with dimethyl methylphosphonate for sensing nerve agents. RSC Adv 2019; 9:10693-10701. [PMID: 35515324 PMCID: PMC9062500 DOI: 10.1039/c9ra00314b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 03/27/2019] [Indexed: 11/21/2022] Open
Abstract
In an effort to develop efficient substrates to sense organophosphonate nerve agents, we used the density-functional theory calculations to determine binding energies and geometries of 1 : 1 complexes formed between dimethyl methylphosphonate (DMMP) and 13 thiourea derivatives (TUn), including four newly-synthesized ones (n = 10-13). The four new thiourea derivatives have a 3,5-bis-(trifluoromethyl)phenyl group as one N-substituent and an alkylphenyl group with zero to three methylene linkages as the other N-substituent. The calculated geometries show that intermolecular double H-bonding is the most important factor influencing the formation of stable complexes at the molecular level. When the calculated binding energies were compared with the receptor efficiencies of the corresponding TUn substrates in a quartz crystal microbalance (QCM), a high degree of correlation was found. However, deviations from the correlation trend were found for a few TUn. We explained the deviations with a series of real time diffuse reflectance IR spectra as well as the calculated geometries. The most efficient receptor, determined from the QCM analysis and the IR spectroscopy, was TU13, in which three methylene linkages may provide an extra flexibility in the side chain. However, the calculated binding energy of the TU13 complex was small as a folded geometry of the bare TU13 hindered the double H-bonding. In contrast, the TU13 molecules in the QCM and the IR analyses may exist in unfolded geometries that are ready to form the double H-bonding.
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Affiliation(s)
- You Kyoung Chung
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Korea
| | - Seonggyun Ha
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Korea
| | - Tae Gyun Woo
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Korea
| | - Young Dok Kim
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Korea
| | - Changsik Song
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Korea
| | - Seong Kyu Kim
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Korea
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Affiliation(s)
- Dan Li
- College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Shibing Zheng
- College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Huakuan Lin
- Department of Chemistry, Nankai University, Tianjin, China
| | - Zhongyue Yang
- Department of Chemistry, Nankai University, Tianjin, China
| | - Weiwei Huang
- College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
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Cristóbal López J, Del Rio M, Oliden A, Bañuelos J, López-Arbeloa I, García-Moreno I, Gómez AM. Solvent-Sensitive Emitting Urea-Bridged bis-BODIPYs: Ready Access by a One-Pot Tandem Staudinger/Aza-Wittig Ureation. Chemistry 2017; 23:17511-17520. [PMID: 28853181 DOI: 10.1002/chem.201703383] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 11/08/2022]
Abstract
Herein we describe the synthesis, and computationally aided photophysical characterization of a new set of urea-bridged bis-BODIPY derivatives. These new dyads are efficiently obtained by a one-pot tandem Staudinger/aza-Wittig ureation protocol, from easily accessible meso-phenyl ortho-azidomethyl BODIPYs. These symmetric bis-BODIPYs outstand by a high absorption probability and excellent fluorescence and laser emission in less polar media. Nevertheless, this emission ability decreases in more polar media, which is ascribed to a light-induced charge-transfer from the urea spacer to the dipyrrin core, a process that can be modulated by appropriate changes in the substitution pattern of the BODIPY core. Furthermore, this ureation protocol can also be employed for the direct conjugation of our BODIPY-azides to amine-containing compounds, thus providing access to fluorescent non-symmetric ureas.
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Affiliation(s)
- J Cristóbal López
- Bio-organic Chemistry Department, Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | - Mayca Del Rio
- Bio-organic Chemistry Department, Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
| | - Ainhoa Oliden
- Departamento Química Física, Universidad del País Vasco-EHU, Aptd. 644, 48080, Bilbao, Spain
| | - Jorge Bañuelos
- Departamento Química Física, Universidad del País Vasco-EHU, Aptd. 644, 48080, Bilbao, Spain
| | - Iñigo López-Arbeloa
- Departamento Química Física, Universidad del País Vasco-EHU, Aptd. 644, 48080, Bilbao, Spain
| | - Inmaculada García-Moreno
- Departamento de Sistemas de baja Dimensionalidad, SuperficiesyMateria Condensada, Instituto de Química Física Rocasolano, CSIC, Serrano 119, 28006, Madrid, Spain
| | - Ana M Gómez
- Bio-organic Chemistry Department, Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, 28006, Madrid, Spain
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