51
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Reddy SMM, Dorishetty P, Augustine G, Deshpande AP, Ayyadurai N, Shanmugam G. A Low-Molecular-Weight Gelator Composed of Pyrene and Fluorene Moieties for Effective Charge Transfer in Supramolecular Ambidextrous Gel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13504-13514. [PMID: 29135262 DOI: 10.1021/acs.langmuir.7b03453] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Charge-transfer (CT) gel materials obtained from low-molecular-weight (LMW) compounds through a supramolecular self-assembly approach have received fascinating attention by many researchers because of their interesting material property and potential applications. However, most of the CT gel materials constructed were of organogels while the construction of CT gels in the form of a hydrogel is a challenge because of the solubility issue in water, which considerably limits the use of CT hydrogels. Herein, for the first time, we report a new LMW gelator [Nα-(fluorenylmethoxycarbonyl)-Nε-(δ-butyric-1-pyrenyl)-l-lysine, (FmKPy)], composed of two functional moieties such as fluorenylmethoxycarbonyl and pyrene, which not only parade both hydro and organo (ambidextrous) supramolecular gel formation but also exhibit CT ambidextrous gels when mixed with an electron acceptor such as 2,4,7-trinitro-9-fluorenone (TNF). This finding is significant as the established CT organogelator in the literature did not form an organogel in the absence of an electron acceptor or lose their gelation property upon the addition of the acceptor. CT between pyrene and TNF was confirmed by the color change as well as the appearance of the CT band in the visible region of the absorption spectrum. CT between FmKPy and TNF was supported by the solvent dilution method using tetrahydrofuran as the gel breaker and pyrene fluorescence quenching in the case compound containing pyrene and TNF. The morphology of FmKPy ambidextrous gels indicates the fibrous nature while the self-assembled structure is primarily stabilized by π-π stacking among fluorenyl and pyrenyl moieties and hydrogen bonding between amide groups. The FmKPy-TNF CT ambidextrous gel retains the fibrous nature; however, the size of the fibers changed. In FmKPy-TNF CT gels, TNF is intercalated between pyrene moieties in the self-assembled structure as confirmed by fluorescence quenching and powder X-ray diffraction. The FmKPy ambidextrous gel exhibits significant properties such as low minimum gelation concentration (MGC), thixotropic nature, pH stimuli response, and high thermal stability. Upon the addition of TNF, the FmKPy-TNF CT ambidextrous gel maintains all these properties except MGC which increased for FmKPy-TNF. Because pyrene-based LMW organogels have been developed widely for many applications while their hydrogels were limited, the current finding of the pyrene-based ambidextrous fluorescent gel with the CT property provides a wide opportunity to use FmKPy as a soft material maker and also for potential applications in fields like surface coating, three-dimensional printing, and so forth.
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Affiliation(s)
- Samala Murali Mohan Reddy
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-CLRI Campus, Adyar, Chennai 600020, India
| | - Pramod Dorishetty
- Department of Chemical Engineering, Indian Institute of Technology Madras , Adyar, Chennai 600036, India
| | | | - Abhijit P Deshpande
- Department of Chemical Engineering, Indian Institute of Technology Madras , Adyar, Chennai 600036, India
| | | | - Ganesh Shanmugam
- Academy of Scientific and Innovative Research (AcSIR) , CSIR-CLRI Campus, Adyar, Chennai 600020, India
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52
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Nelli SR, Chakravarthy RD, Xing YM, Weng JP, Lin HC. Self-assembly of single amino acid/pyrene conjugates with unique structure-morphology relationship. SOFT MATTER 2017; 13:8402-8407. [PMID: 29077128 DOI: 10.1039/c7sm01669g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This article describes the self-assembly of π-conjugated building blocks composed of single amino acid and pyrene (Py) moieties. In aqueous conditions, the Py-capped amino acids undergo self-assembly through various non-covalent interactions such as hydrogen-bonding, π-π stacking as well as electrostatic interactions to form supramolecular nanostructures in acidic and basic conditions. Interestingly, we found that the blend of different Py-gelators with oppositely charged amino acids (Py-Glu and Py-Lys) displays unique nano-structural morphologies and gelation properties of the resulting hydrogels at physiological pH when compared with single Py conjugates, which was attributed to additional electrostatic interactions. Overall, this report illustrates the importance of two-component supramolecular co-assembled hydrogels and their structure-morphology relationship, improved mechanical properties, and biocompatibility and thus provides a new insight into the design of self-assembled nanomaterials.
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Affiliation(s)
- Srinivasa Rao Nelli
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan, Republic of China.
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53
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Mears LE, Draper ER, Castilla AM, Su H, Zhuola, Dietrich B, Nolan MC, Smith GN, Doutch J, Rogers S, Akhtar R, Cui H, Adams DJ. Drying Affects the Fiber Network in Low Molecular Weight Hydrogels. Biomacromolecules 2017; 18:3531-3540. [PMID: 28631478 PMCID: PMC5686561 DOI: 10.1021/acs.biomac.7b00823] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 06/19/2017] [Indexed: 11/30/2022]
Abstract
Low molecular weight gels are formed by the self-assembly of a suitable small molecule gelator into a three-dimensional network of fibrous structures. The gel properties are determined by the fiber structures, the number and type of cross-links and the distribution of the fibers and cross-links in space. Probing these structures and cross-links is difficult. Many reports rely on microscopy of dried gels (xerogels), where the solvent is removed prior to imaging. The assumption is made that this has little effect on the structures, but it is not clear that this assumption is always (or ever) valid. Here, we use small angle neutron scattering (SANS) to probe low molecular weight hydrogels formed by the self-assembly of dipeptides. We compare scattering data for wet and dried gels, as well as following the drying process. We show that the assumption that drying does not affect the network is not always correct.
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Affiliation(s)
- Laura
L. E. Mears
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
| | - Emily R. Draper
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
- School
of Chemistry, WESTChem, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - Ana M. Castilla
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
| | - Hao Su
- Department
of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Zhuola
- Department
of Mechanical, Materials and Aerospace Engineering, School of Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom
| | - Bart Dietrich
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
- School
of Chemistry, WESTChem, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - Michael C. Nolan
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
- School
of Chemistry, WESTChem, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - Gregory N. Smith
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield, S3 7HF, United Kingdom
| | - James Doutch
- STFC
ISIS
Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, United Kingdom
| | - Sarah Rogers
- STFC
ISIS
Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, United Kingdom
| | - Riaz Akhtar
- Department
of Mechanical, Materials and Aerospace Engineering, School of Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom
| | - Honggang Cui
- Department
of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Dave J. Adams
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
- School
of Chemistry, WESTChem, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
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54
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Tao K, Levin A, Adler-Abramovich L, Gazit E. Fmoc-modified amino acids and short peptides: simple bio-inspired building blocks for the fabrication of functional materials. Chem Soc Rev 2017; 45:3935-53. [PMID: 27115033 DOI: 10.1039/c5cs00889a] [Citation(s) in RCA: 300] [Impact Index Per Article: 42.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Amino acids and short peptides modified with the 9-fluorenylmethyloxycarbonyl (Fmoc) group possess eminent self-assembly features and show distinct potential for applications due to the inherent hydrophobicity and aromaticity of the Fmoc moiety which can promote the association of building blocks. Given the extensive study and numerous publications in this field, it is necessary to summarize the recent progress concerning these important bio-inspired building blocks. Therefore, in this review, we explore the self-organization of this class of functional molecules from three aspects, i.e., Fmoc-modified individual amino acids, Fmoc-modified di- and tripeptides, and Fmoc-modified tetra- and pentapeptides. The relevant properties and applications related to cell cultivation, bio-templating, optical, drug delivery, catalytic, therapeutic and antibiotic properties are subsequently summarized. Finally, some existing questions impeding the development of Fmoc-modified simple biomolecules are discussed, and corresponding strategies and outlooks are suggested.
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Affiliation(s)
- Kai Tao
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.
| | - Aviad Levin
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel.
| | - Lihi Adler-Abramovich
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel. and Department of Oral Biology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel. and Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 6997801, Israel
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55
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Vieira VMP, Hay LL, Smith DK. Multi-component hybrid hydrogels - understanding the extent of orthogonal assembly and its impact on controlled release. Chem Sci 2017; 8:6981-6990. [PMID: 29147525 PMCID: PMC5642149 DOI: 10.1039/c7sc03301j] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 08/18/2017] [Indexed: 12/20/2022] Open
Abstract
This paper reports self-assembled multi-component hybrid hydrogels including a range of nanoscale systems and characterizes the extent to which each component maintains its own unique functionality, demonstrating that multi-functionality can be achieved by simply mixing carefully-chosen constituents. Specifically, the individual components are: (i) pH-activated low-molecular-weight gelator (LMWG) 1,3;2,4-dibenzylidenesorbitol-4',4''-dicarboxylic acid (DBS-COOH), (ii) thermally-activated polymer gelator (PG) agarose, (iii) anionic biopolymer heparin, and (iv) cationic self-assembled multivalent (SAMul) micelles capable of binding heparin. The LMWG still self-assembles in the presence of PG agarose, is slightly modified on the nanoscale by heparin, but is totally disrupted by the micelles. However, if the SAMul micelles are bound to heparin, DBS-COOH self-assembly is largely unaffected. The LMWG endows hybrid materials with pH-responsive behavior, while the PG provides mechanical robustness. The rate of heparin release can be controlled through network density and composition, with the LMWG and PG behaving differently in this regard, while the presence of the heparin binder completely inhibits heparin release through complexation. This study demonstrates that a multi-component approach can yield exquisite control over self-assembled materials. We reason that controlling orthogonality in such systems will underpin further development of controlled release systems with biomedical applications.
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Affiliation(s)
- Vânia M P Vieira
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK . ; http://www.york.ac.uk/chemistry/staff/academic/o-s/dsmith/
| | - Laura L Hay
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK . ; http://www.york.ac.uk/chemistry/staff/academic/o-s/dsmith/
| | - David K Smith
- Department of Chemistry , University of York , Heslington , York , YO10 5DD , UK . ; http://www.york.ac.uk/chemistry/staff/academic/o-s/dsmith/
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56
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Basak S, Singh I, Ferranco A, Syed J, Kraatz HB. On the Role of Chirality in Guiding the Self-Assembly of Peptides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shibaji Basak
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Ishwar Singh
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Annaleizle Ferranco
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Jebreil Syed
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
- Department of Chemistry; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
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57
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Basak S, Singh I, Ferranco A, Syed J, Kraatz HB. On the Role of Chirality in Guiding the Self-Assembly of Peptides. Angew Chem Int Ed Engl 2017; 56:13288-13292. [DOI: 10.1002/anie.201706162] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/13/2017] [Indexed: 01/02/2023]
Affiliation(s)
- Shibaji Basak
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Ishwar Singh
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Annaleizle Ferranco
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Jebreil Syed
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences; University of Toronto; 1265 Military Trail Toronto M1C 1A4 Canada
- Department of Chemistry; University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
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58
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Ji W, Li L, Eniola-Adefeso O, Wang Y, Liu C, Feng C. Non-invasively visualizing cell-matrix interactions in two-photon excited supramolecular hydrogels. J Mater Chem B 2017; 5:7790-7795. [PMID: 32264379 DOI: 10.1039/c7tb02274c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Visualizing the role of extracellular matrix (ECM) in cell bioactivities in three-dimensional (3D) view is highly important for in-depth understanding of fundamental physiological issues in various in vitro experiments. Using current designs it is difficult to produce 3D biomimetic ECM with intrinsic fluorescence under non-invasive near-infrared excitation. Herein, we have designed and synthesized a series of non-conventional coumarin-derived hydrogelators, which can self-assemble to form nanofibrous 3D supramolecular hydrogels through C-HO bonds and be excited by two-photon absorption, ensuring the direct and dynamic visualization of cell-matrix interactions with high resolution images in a 3D environment. Real-time monitoring of ECM-regulated dynamic cell behaviours is highly desirable for future basic and applied research.
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Affiliation(s)
- Wei Ji
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China.
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59
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Su H, Wang Y, Anderson CF, Koo JM, Wang H, Cui H. Recent progress in exploiting small molecule peptides as supramolecular hydrogelators. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-017-1998-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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60
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Rajbhandary A, Raymond DM, Nilsson BL. Self-Assembly, Hydrogelation, and Nanotube Formation by Cation-Modified Phenylalanine Derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5803-5813. [PMID: 28514156 DOI: 10.1021/acs.langmuir.7b00686] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fluorenylmethoxycarbonyl-protected phenylalanine (Fmoc-Phe) derivatives are a privileged class of molecule that spontaneously self-assemble into hydrogel fibril networks. Fmoc-Phe-derived hydrogels are typically formed by dilution of the hydrogelator from an organic cosolvent into water, by dissolution of the hydrogelator under basic aqueous conditions followed by adjustment of the pH with acid, or by other external triggering forces, including sonication and heating. These conditions complicate biological applications of these hydrogels. Herein, we report C-terminal cation-modified Fmoc-Phe derivatives that are positively charged across a broad range of pH values and that can self-assemble and form hydrogel networks spontaneously without the need to adjust pH or to use an organic cosolvent. In addition, these cationic Fmoc-Phe derivatives are found to self-assemble into novel sheet-based nanotube structures at higher concentrations. These nanotube structures are unique to C-terminal cationic Fmoc-Phe derivatives; the parent Fmoc-Phe carboxylic acids form only fibril or worm-like micelle structures. Nanotube formation by the cationic Fmoc-Phe molecules is dependent on positive charge at the C-terminus, since at basic pH where the positive charge is reduced only fibrils/worm-like micelles are formed and nanotube formation is suppressed. These studies provide an important example of Fmoc-Phe derivatives that can elicit hydrogelation without organic cosolvent or pH modification and also provide insight into how subtle modification of structure can perturb the self-assembly pathways of Fmoc-Phe derivatives.
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Affiliation(s)
- Annada Rajbhandary
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
| | - Danielle M Raymond
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
| | - Bradley L Nilsson
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
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61
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Draper ER, Wallace M, Schweins R, Poole RJ, Adams DJ. Nonlinear Effects in Multicomponent Supramolecular Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2387-2395. [PMID: 28191979 DOI: 10.1021/acs.langmuir.7b00326] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Multicomponent low molecular weight gels are useful for a range of applications. However, when mixing two components, both of which can independently form a gel, there are many potential scenarios. There is a limited understanding as to how to control and direct the assembly. Here, we focus on a pH-triggered two-component system. At high pH, colloidal structures are formed, and there is a degree of mixing of the two gelators. As the pH is decreased, there is a complex situation, where one gelator directs the assembly in a "sergeants and soldiers" manner. The second gelator is not fully incorporated, and the remainder forms an independent network. The result is that there is a nonlinear dependence on the final mechanical properties of the gels, with the storage or loss modulus being very dependent on the absolute ratio of the two components in the system.
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Affiliation(s)
- Emily R Draper
- School of Chemistry, Joseph Black Building, University of Glasgow , Glasgow G12 8QQ, U.K
| | - Matthew Wallace
- Department of Chemistry, University of Liverpool , Crown Street, Liverpool L69 7ZD, U.K
| | - Ralf Schweins
- Large Scale Structures Group, Institut Laue-Langevin , 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble, CEDEX 9, France
| | - Robert J Poole
- School of Engineering, University of Liverpool , Brownlow Street, Liverpool L69 3GH, U.K
| | - Dave J Adams
- School of Chemistry, Joseph Black Building, University of Glasgow , Glasgow G12 8QQ, U.K
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62
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Abul-Haija YM, Scott GG, Sahoo JK, Tuttle T, Ulijn RV. Cooperative, ion-sensitive co-assembly of tripeptide hydrogels. Chem Commun (Camb) 2017; 53:9562-9565. [DOI: 10.1039/c7cc04796g] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Computational simulations and experimental validation of cooperative co-assembly of structural and functional tripeptides shows selective hydrogel formation in response to complexation with copper.
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Affiliation(s)
- Yousef M. Abul-Haija
- WestCHEM/Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow G1 1XL
- UK
- WestCHEM/School of Chemistry
| | - Gary G. Scott
- WestCHEM/Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow G1 1XL
- UK
| | - Jugal Kishore Sahoo
- WestCHEM/Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow G1 1XL
- UK
| | - Tell Tuttle
- WestCHEM/Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow G1 1XL
- UK
| | - Rein V. Ulijn
- WestCHEM/Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow G1 1XL
- UK
- Advanced Science Research Center (ASRC) at the Graduate Center of the City University of New York (CUNY)
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63
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Aronsson C, Selegård R, Aili D. Zinc-Triggered Hierarchical Self-Assembly of Fibrous Helix–Loop–Helix Peptide Superstructures for Controlled Encapsulation and Release. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Christopher Aronsson
- Division
of Molecular Physics,
Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Robert Selegård
- Division
of Molecular Physics,
Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Daniel Aili
- Division
of Molecular Physics,
Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
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64
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Boekhoven J, Brizard AM, Stuart MCA, Florusse L, Raffy G, Del Guerzo A, van Esch JH. Bio-inspired supramolecular materials by orthogonal self-assembly of hydrogelators and phospholipids. Chem Sci 2016; 7:6021-6031. [PMID: 30034743 PMCID: PMC6022170 DOI: 10.1039/c6sc01021k] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 05/06/2016] [Indexed: 12/12/2022] Open
Abstract
The orthogonal self-assembly of multiple components is a powerful strategy towards the formation of complex biomimetic architectures, but so far the rules for designing such systems are unclear. Here we show how to identify orthogonal self-assembly at the supramolecular level and describe guidelines to achieve self-sorting in self-assembled mixed systems. By investigating multicomponent self-assembled systems consisting of low molecular weight gelators and phospholipids, both at a molecular and a supramolecular level, we found that orthogonal self-assembly can only take place if the entities assemble via a strong and distinct set of interactions. The resulting supramolecular architectures consist of fibrillar networks that coexist with liposomes and thereby provide additional levels of compartmentalization and enhanced stability as compared to self-assembled systems of gelators or phospholipids alone.
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Affiliation(s)
- J Boekhoven
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628BL Delft , The Netherlands .
| | - A M Brizard
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628BL Delft , The Netherlands .
| | - M C A Stuart
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 7 , 9747AG Groningen , The Netherlands
| | - L Florusse
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628BL Delft , The Netherlands .
| | - G Raffy
- Univ. Bordeaux , ISM , UMR 5255 , 351 cours de la Libération , 33400 Talence , France
| | - A Del Guerzo
- Univ. Bordeaux , ISM , UMR 5255 , 351 cours de la Libération , 33400 Talence , France
| | - J H van Esch
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628BL Delft , The Netherlands .
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65
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Singh N, Zhang K, Angulo-Pachón CA, Mendes E, van Esch JH, Escuder B. Tandem reactions in self-sorted catalytic molecular hydrogels. Chem Sci 2016; 7:5568-5572. [PMID: 30034697 PMCID: PMC6021788 DOI: 10.1039/c6sc01268j] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 05/06/2016] [Indexed: 12/14/2022] Open
Abstract
By equipping mutually incompatible carboxylic acid and proline catalytic groups with different self-assembling motives we have achieved self-sorting of the resulting catalytic gelators, namely SucVal8 and ProValDoc, into different supramolecular fibers, thus preventing the acidic and basic catalytic groups from interfering with each other. The resulting spatial separation of the incompatible catalytic functions is found to be essential to achieve one-pot deacetalization-aldol tandem reactions with up to 85% efficiency and 90% enantioselectivity. On the contrary, when SucVal8 was co-assembled with a structurally similar catalytically active hydrogelator (ProVal8), self-sorting was precluded and no tandem catalysis was observed.
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Affiliation(s)
- Nishant Singh
- Departament de Química Inorgànica i Orgànica , Universitat Jaume I , E-12071 Castelló , Spain .
| | - Kai Zhang
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628 BL Delft , The Netherlands .
| | - César A Angulo-Pachón
- Departament de Química Inorgànica i Orgànica , Universitat Jaume I , E-12071 Castelló , Spain .
| | - Eduardo Mendes
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628 BL Delft , The Netherlands .
| | - Jan H van Esch
- Department of Chemical Engineering , Delft University of Technology , Julianalaan 136 , 2628 BL Delft , The Netherlands .
| | - Beatriu Escuder
- Departament de Química Inorgànica i Orgànica , Universitat Jaume I , E-12071 Castelló , Spain .
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66
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Alakpa E, Jayawarna V, Lampel A, Burgess K, West C, Bakker S, Roy S, Javid N, Fleming S, Lamprou D, Yang J, Miller A, Urquhart A, Frederix P, Hunt N, Péault B, Ulijn R, Dalby M. Tunable Supramolecular Hydrogels for Selection of Lineage-Guiding Metabolites in Stem Cell Cultures. Chem 2016. [DOI: 10.1016/j.chempr.2016.07.001] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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67
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Baker BC, Higgins CL, Ravishankar D, Colquhoun HM, Stevens GC, Greco F, Greenland BW, Hayes W. Multifunctional, Biocompatible, Non-peptidic Hydrogels: from Water Purification to Drug Delivery. ChemistrySelect 2016. [DOI: 10.1002/slct.201600249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Benjamin C. Baker
- Department of Chemistry; University of Reading; Whiteknights, Reading RG6 6AD UK
| | - Clare L. Higgins
- Department of Chemistry; University of Reading; Whiteknights, Reading RG6 6AD UK
| | | | - Howard M. Colquhoun
- Department of Chemistry; University of Reading; Whiteknights, Reading RG6 6AD UK
| | - Gary C. Stevens
- Gnosys Global Ltd.; 17-18 Frederick Sanger Road Guildford, Surrey GU2 7YD UK
| | - Francesca Greco
- School of Pharmacy; University of Reading; Whiteknights, Reading RG6 6AP UK
| | | | - Wayne Hayes
- Department of Chemistry; University of Reading; Whiteknights, Reading RG6 6AD UK
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68
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Dasgupta A. Exploring architectures at the nanoscale: the interplay between hydrophobic twin lipid chains and head groups of designer peptide amphiphiles in the self-assembly process and application. SOFT MATTER 2016; 12:4352-4360. [PMID: 27079384 DOI: 10.1039/c6sm00147e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The self-assembly of peptide amphiphiles (PAs) is found to be governed by the hydrophobic interactions induced by the hydrophobic groups/number of alkyl chains and the hydrophilic head groups. In this study, an assessment of the nanostructures formed by the self-assembly of simple twin chained PAs was carried out and compared to their single chain/short analogues. The spectroscopic and microscopic analysis revealed the fact that the twin chained amphiphiles had a high inclination to form β-sheet nanofibers and further towards hydrogelation. The mixture of twin chained PAs also exhibited cooperative self-assembly with improved aggregation behavior, although not much augmentation in β-type structuring was found. In contrast, the single chain/short analogue containing PAs showed very less of β-sheet type structures to a lesser extent and no hydrogelating behavior but resulted in mostly random conformations. The increase in the number or alteration of polar head groups in double chained PAs induced higher extent of β-type conformation and better gelling capability due to the combined hydrophobic effect of the twin chains. The overall results delineated the dominance of hydrophobic interactions. Finally, calcium phosphate bio-mineralization was done in the hydrogels of twin chained PAs with the aim of developing future biomaterials.
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Affiliation(s)
- Antara Dasgupta
- Department of Chemistry, IIT Guwahati, Guwahati, Assam - 781039, India.
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69
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Cardoso AZ, Mears LLE, Cattoz BN, Griffiths PC, Schweins R, Adams DJ. Linking micellar structures to hydrogelation for salt-triggered dipeptide gelators. SOFT MATTER 2016; 12:3612-3621. [PMID: 26963370 DOI: 10.1039/c5sm03072b] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Some functionalised dipeptides can form hydrogels when salts are added to solutions at high pH. We have used surface tension, conductivity, rheology, optical, confocal and scanning electron microscopy, (1)H NMR and UV-Vis spectroscopy measurements to characterise fully the phase behaviour of solutions of one specific gelator, 2NapFF, at 25 °C at pH 10.5. We show that this specific naphthalene-dipeptide undergoes structural transformations as the concentration is increased, initially forming spherical micelles, then worm-like micelles, followed by association of these worm-like micelles. On addition of a calcium salt, gels are generally formed as long as worm-like micelles are initially present in solution, although there are structural re-organisations that occur at lower concentrations, allowing gelation at lower than expected concentration. Using IR and SANS, we show the differences between the structures present in the solution and hydrogel phases.
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Affiliation(s)
- Andre Zamith Cardoso
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
| | - Laura L E Mears
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
| | - Beatrice N Cattoz
- Department of Pharmaceutical, Chemical and Environmental Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK
| | - Peter C Griffiths
- Department of Pharmaceutical, Chemical and Environmental Science, University of Greenwich, Medway Campus, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK
| | - Ralf Schweins
- Institut Laue-Langevin, Large Scale Structures Group, 71 Avenue des Martyrs, CS 20156, F-38042 Grenoble CEDEX 9, France
| | - Dave J Adams
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
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70
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Baral A, Roy S, Ghosh S, Hermida-Merino D, Hamley IW, Banerjee A. A Peptide-Based Mechano-sensitive, Proteolytically Stable Hydrogel with Remarkable Antibacterial Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1836-45. [PMID: 26818698 DOI: 10.1021/acs.langmuir.5b03789] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A long-chain amino acid containing dipeptide has been found to form a hydrogel in phosphate buffer whose pH ranges from 6.0 to 8.8. The hydrogel formed at pH 7.46 has been characterized by small-angle X-ray scattering (SAXS), wide-angle powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM) imaging and rheological analyses. The microscopic imaging studies suggest the formation of a nanofibrillar three-dimensional (3D) network for the hydrogel. As observed visually and confirmed rheologically, the hydrogel at pH 7.46 exhibits thixotropy. This thixotropic property can be exploited to inject the peptide. Furthermore, the hydrogel exhibits remarkable antibacterial activity against Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa, which are responsible for many common diseases. The hydrogel has practical applicability due to its biocompatibility with human red blood cells and human fibroblast cells. Interestingly, this hydrogel shows high resistance toward proteolytic enzymes, making it a new potential antimicrobial agent for future applications. It has also been observed that a small change in molecular structure of the gelator peptide not only turns the gelator into a nongelator molecule under similar conditions, but it also has a significant negative impact on its bactericidal character.
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Affiliation(s)
- Abhishek Baral
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India
| | - Subhasish Roy
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India
| | - Srabanti Ghosh
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences , Block-JD, Sector-III, Salt Lake, Kolkata-700098, India
| | | | - Ian W Hamley
- Department of Chemistry, University of Reading-Whiteknights , Reading, RG6 6AD, United Kingdom
| | - Arindam Banerjee
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India
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71
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Kemper B, Hristova YR, Tacke S, Stegemann L, van Bezouwen LS, Stuart MCA, Klingauf J, Strassert CA, Besenius P. Facile synthesis of a peptidic Au(I)-metalloamphiphile and its self-assembly into luminescent micelles in water. Chem Commun (Camb) 2016; 51:5253-6. [PMID: 25001106 DOI: 10.1039/c4cc03868a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report a short synthetic route for the preparation of a peptidic Au(I)-metalloamphiphile which, in buffered environments of physiological ionic strength, self-assembles into luminescent micellar nanostructures of 14 nm in diameter.
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Affiliation(s)
- Benedict Kemper
- Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.
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72
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Liyanage W, Nilsson BL. Substituent Effects on the Self-Assembly/Coassembly and Hydrogelation of Phenylalanine Derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:787-799. [PMID: 26717444 DOI: 10.1021/acs.langmuir.5b03227] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Supramolecular hydrogels derived from the self-assembly of organic molecules have been exploited for applications ranging from drug delivery to tissue engineering. The relationship between the structure of the assembly motif and the emergent properties of the resulting materials is often poorly understood, impeding rational approaches for the creation of next-generation materials. Aromatic π-π interactions play a significant role in the self-assembly of many supramolecular hydrogelators, but the exact nature of these interactions lacks definition. Conventional models that describe π-π interactions rely on quadrupolar electrostatic interactions between neighboring aryl groups in the π-system. However, recent experimental and computational studies reveal the potential importance of local dipolar interactions between elements of neighboring aromatic rings in stabilizing π-π interactions. Herein, we examine the nature of π-π interactions in the self- and coassembly of Fmoc-Phe-derived hydrogelators by systematically varying the electron-donating or electron-withdrawing nature of the side chain benzyl substituents and correlating these effects to the emergent assembly and gelation properties of the systems. These studies indicate a significant role for stabilizing dipolar interactions between neighboring benzyl groups in the assembled materials. Additional evidence for specific dipolar interactions is provided by high-resolution crystal structures obtained from dynamic transition of gel fibrils to crystals for several of the self-assembled/coassembled Fmoc-Phe derivatives. In addition to electronic effects, steric properties also have a significant effect on the interaction between neighboring benzyl groups in these assembled systems. These findings provide significant insight into the structure-function relationship for Fmoc-Phe-derived hydrogelators and give cues for the design of next-generation materials with desired emergent properties.
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Affiliation(s)
- Wathsala Liyanage
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
| | - Bradley L Nilsson
- Department of Chemistry, University of Rochester , Rochester, New York 14627-0216, United States
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73
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Kirkham S, Hamley IW, Smith AM, Gouveia RM, Connon CJ, Reza M, Ruokolainen J. A self-assembling fluorescent dipeptide conjugate for cell labelling. Colloids Surf B Biointerfaces 2016; 137:104-8. [DOI: 10.1016/j.colsurfb.2015.04.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 04/27/2015] [Accepted: 04/28/2015] [Indexed: 10/23/2022]
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74
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Draper ER, Eden EGB, McDonald TO, Adams DJ. Spatially resolved multicomponent gels. Nat Chem 2015; 7:848-52. [PMID: 26391086 DOI: 10.1038/nchem.2347] [Citation(s) in RCA: 192] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 08/12/2015] [Indexed: 02/07/2023]
Abstract
Multicomponent supramolecular systems could be used to prepare exciting new functional materials, but it is often challenging to control the assembly across multiple length scales. Here we report a simple approach to forming patterned, spatially resolved multicomponent supramolecular hydrogels. A multicomponent gel is first formed from two low-molecular-weight gelators and consists of two types of fibre, each formed by only one gelator. One type of fibre in this 'self-sorted network' is then removed selectively by a light-triggered gel-to-sol transition. We show that the remaining network has the same mechanical properties as it would have done if it initially formed alone. The selective irradiation of sections of the gel through a mask leads to the formation of patterned multicomponent networks, in which either one or two networks can be present at a particular position with a high degree of spatial control.
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Affiliation(s)
- Emily R Draper
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Edward G B Eden
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Tom O McDonald
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Dave J Adams
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
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75
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Duan Z, Gao YJ, Qiao ZY, Qiao S, Wang Y, Hou C, Wang L, Wang H. pH-Sensitive polymer assisted self-aggregation of bis(pyrene) in living cells in situ with turn-on fluorescence. NANOTECHNOLOGY 2015; 26:355703. [PMID: 26245834 DOI: 10.1088/0957-4484/26/35/355703] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Supramolecular self-assemblies with various nanostructures in organic and aqueous solutions have been prepared with desired functions. However, in situ construction of self-assembled superstructures in physiological conditions to achieve expected biological functions remains a challenge. Here, we report a supramolecular system to realize the in situ formation of nanoaggregates in living cells. The bis(pyrene) monomers were dispersed inside of hydrophobic domains of pH-sensitive polymeric micelles and delivered to the lysosomes of cells. In the acidic lysosomes, the bis(pyrene) monomers were released and self-aggregated with turn-on fluorescence. We envision this strategy for in situ construction of supramolecular nanostructures in living cells will pave the way for molecular diagnostics in the future.
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Affiliation(s)
- Zhongyu Duan
- School of Chemical Engineering & Technology, Hebei University of Technology, No. 8 Guangrongdao, Hongqiao District, Tianjin, 300130, People's Republic of China
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76
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Biswas A, Banerjee A. Sunlight induced unique morphological transformation in graphene based nanohybrids: appearance of a new tetra-nanohybrid and tuning of functional property of these nanohybrids. SOFT MATTER 2015; 11:4226-4234. [PMID: 25892272 DOI: 10.1039/c5sm00359h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, sunlight was used for in situ preparation of gel-based various nanohybrid systems. A naturally occurring amino acid, l-phenylalanine derivative formed a hydrogel with graphene oxide (GO)/reduced graphene oxide (rGO) at physiological pH. This hydrogel was then used in the presence of silver ions and diffuse sunlight to form initially a tri-nanohybrid system consisting of six atom silver nanoclusters, nanosheets, and nanofibers. Interestingly, a time-dependent morphological transformation occurs in this nanohybrid system to form one tri-nanohybrid to another tri-nanohybrid with the appearance of a novel, nanoscopic intermediate tetra-nanohybrid system consisting of four distinctly different nanomaterials (nanofibers, nanosheets, nanospheres, and nanoparticles). UV-Vis and fluorescence spectroscopic analyses, transmission electron microscopic, X-ray photo electron spectroscopic and MALDI-TOF mass spectral analyses with time were applied to characterise these morphological transformations in gel based nanohybrids. Time-dependent X-ray photo electron spectroscopic (XPS) analysis was used to uncover the mechanism for the transformation of silver nanoclusters to silver nanoparticles in the hydrogel matrix. Sunlight was used to trigger time-dependent structural transformation in the nanohybrid systems. Interestingly, one of these tri-nanohybrid systems (silver nanoparticles containing rGO based hydrogel) shows a catalytic property of reducing nitroarenes to aminoarenes and the catalytic efficiency can be modulated by changing the size of the silver nanoparticles with time in diffuse sunlight. The mechanism for different catalytic activities for different hybrids with varying size of silver nanoparticles has also been deciphered.
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Affiliation(s)
- Abhijit Biswas
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
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77
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Yang C, Chu L, Zhang Y, Shi Y, Liu J, Liu Q, Fan S, Yang Z, Ding D, Kong D, Liu J. Dynamic biostability, biodistribution, and toxicity of L/D-peptide-based supramolecular nanofibers. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2735-2744. [PMID: 25555064 DOI: 10.1021/am507800e] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Self-assembling peptide nanofibers (including naturally L-amino acid-based and unnaturally D-amino acid-based ones) have been widely utilized in biomedical research. However, there has been no systematic study on their in vivo stability, distribution, and toxicity. Herein we systematically study the in vivo dynamic biostability, biodistribution, and toxicity of supramolecular nanofibers formed by Nap-GFFYGRGD (L-amino acid-based, L-fibers) and Nap-G(D)F(D)F(D)YGRGD (D-amino acid-based, D-fibers), respectively. The D-fibers have better in vitro and in vivo biostabilities than L-fibers. It is found that D-fibers keep a good integrity in plasma during 24 h, while half of l-fibers are digested upon incubation in plasma for 6 h. The biodistributions of L- and D-fibers are also studied using the iodine-125 radiolabeling technique. The results reveal that L-fibers mainly accumulate in stomach, whereas d-fibers preferentially distribute in liver. Successive administrations of both L- and D-fibers with the dose of 30 mg/kg/dose cause no significant inflammation, liver and kidney function damages, immune reaction, and dysfunction of hematopoietic system. This study will provide fundamental guidelines for utilization of self-assembling peptide-based supramolecular nanomaterials in biomedical applications, such as drug delivery, bioimaging, and regenerative medicine.
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Affiliation(s)
- Cuihong Yang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Science & Peking Union Medical College , Tianjin 300192, P. R. China
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78
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He T, Li Z, Sun Z, Chen S, Shen R, Yi L, Deng L, Yang M, Liu H, Zhang Y. From supramolecular hydrogels to functional aerogels: a facile strategy to fabricate Fe3O4/N-doped graphene composites. RSC Adv 2015. [DOI: 10.1039/c5ra15595a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The Fe3O4/N-GAs directly derived from Fc-F/GO supramolecular hydrogels act as multifunctional reagents, including Fe/N sources and the dispersant of GO.
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Affiliation(s)
- Ting He
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Zhengyuan Li
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Zhifang Sun
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Shuzhen Chen
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Rujuan Shen
- State Key Laboratory of Power Metallurgy
- Central South University
- Changsha 410083
- China
| | - Lunzhao Yi
- Yunnan Food Safety Research Institute
- Kunming University of Science and Technology
- Kunming
- China
| | - Liu Deng
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Minghui Yang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Hongtao Liu
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
| | - Yi Zhang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- China
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79
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Abstract
We discuss the potential and challenges of multicomponent low molecular weight gels.
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Affiliation(s)
- Jaclyn Raeburn
- Department of Chemistry
- University of Liverpool
- Liverpool
- UK
| | - Dave J. Adams
- Department of Chemistry
- University of Liverpool
- Liverpool
- UK
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80
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Sun J, Zhang H, Guo K, Yuan S. Self-assembly of dipeptide sodium salts derived from alanine: a molecular dynamics study. RSC Adv 2015. [DOI: 10.1039/c5ra19508j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The dipeptides self-assemble into a helical structure after a 200 ns MD simulation.
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Affiliation(s)
- Jichao Sun
- Key Lab of Colloid and Interface Chemistry
- Shandong University
- Jinan 250100
- China
| | - Heng Zhang
- Key Lab of Colloid and Interface Chemistry
- Shandong University
- Jinan 250100
- China
| | - Kai Guo
- Key Lab of Colloid and Interface Chemistry
- Shandong University
- Jinan 250100
- China
| | - Shiling Yuan
- Key Lab of Colloid and Interface Chemistry
- Shandong University
- Jinan 250100
- China
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81
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Colquhoun C, Draper ER, Eden EGB, Cattoz BN, Morris KL, Chen L, McDonald TO, Terry AE, Griffiths PC, Serpell LC, Adams DJ. The effect of self-sorting and co-assembly on the mechanical properties of low molecular weight hydrogels. NANOSCALE 2014; 6:13719-25. [PMID: 25285577 DOI: 10.1039/c4nr04039b] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Self-sorting in low molecular weight hydrogels can be achieved using a pH triggered approach. We show here that this method can be used to prepare gels with different types of mechanical properties. Cooperative, disruptive or orthogonal assembled systems can be produced. Gels with interesting behaviour can be also prepared, for example self-sorted gels where delayed switch-on of gelation occurs. By careful choice of gelator, co-assembled structures can also be generated, which leads to synergistic strengthening of the mechanical properties.
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Affiliation(s)
- Catherine Colquhoun
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, U.K.
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82
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Cheetham A, Zhang P, Lin YA, Lin R, Cui H. Synthesis and Self-Assembly of a Mikto-Arm Star Dual Drug Amphiphile Containing both Paclitaxel and Camptothecin. J Mater Chem B 2014; 2:7316-7326. [PMID: 25667746 PMCID: PMC4319564 DOI: 10.1039/c4tb01084a] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Self-assembly of anticancer therapeutics into discrete nanostructures provides an innovative way to develop a self-delivering nanomedicine with a high, quantitative drug loading. We report here the synthesis and assembly of a mikto-arm star dual drug amphiphile (DA) containing both a bulky paclitaxel (PTX) and a planar camptothecin (CPT). The two anti-cancer drugs of interest were stochastically conjugated to a β-sheet forming peptide (Sup35) and under physiologically-relevant conditions the dual DA could spontaneously associate into supramolecular filaments with a fixed 41% total drug loading (29% PTX and 12% CPT). Transmission electron microscopy imaging and circular dichroism spectroscopy studies reveal that the bulkiness of the PTX, as well as the π-π interaction preference between the CPT units, has a significant impact on the assembly kinetics, molecular level packing, and nanostructure morphology and stability. We found that the DA containing two PTX units assembled into non-filamentous micelle-like structures, in contrast to the filamentous structures formed by the hetero dual DA and the DA containing two CPTs. The hetero dual DA was found to effectively release the two anticancer agents, exhibiting superior cytotoxicity against PTX-resistant cervical cancer cells. The presented work offers a potential method to generate well-defined entwined filamentous nanostructures and provides the basis for a future combination therapy platform.
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Affiliation(s)
- A.G. Cheetham
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
- Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - P. Zhang
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Y.-A. Lin
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
- Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - R. Lin
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - H. Cui
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA
- Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, USA
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83
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Ji W, Liu G, Xu M, Dou X, Feng C. Rational design of coumarin-based supramolecular hydrogelators for cell imaging. Chem Commun (Camb) 2014; 50:15545-8. [DOI: 10.1039/c4cc06376g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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84
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Fleming S, Ulijn RV. Design of nanostructures based on aromatic peptide amphiphiles. Chem Soc Rev 2014; 43:8150-77. [PMID: 25199102 DOI: 10.1039/c4cs00247d] [Citation(s) in RCA: 591] [Impact Index Per Article: 59.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Aromatic peptide amphiphiles are gaining popularity as building blocks for the bottom-up fabrication of nanomaterials, including gels. These materials combine the simplicity of small molecules with the versatility of peptides, with a range of applications proposed in biomedicine, nanotechnology, food science, cosmetics, etc. Despite their simplicity, a wide range of self-assembly behaviours have been described. Due to varying conditions and protocols used, care should be taken when attempting to directly compare results from the literature. In this review, we rationalise the structural features which govern the self-assembly of aromatic peptide amphiphiles by focusing on four segments, (i) the N-terminal aromatic component, (ii) linker segment, (iii) peptide sequence, and (iv) C-terminus. It is clear that the molecular structure of these components significantly influences the self-assembly process and resultant supramolecular architectures. A number of modes of assembly have been proposed, including parallel, antiparallel, and interlocked antiparallel stacking conformations. In addition, the co-assembly arrangements of aromatic peptide amphiphiles are reviewed. Overall, this review elucidates the structural trends and design rules that underpin the field of aromatic peptide amphiphile assembly, paving the way to a more rational design of nanomaterials based on aromatic peptide amphiphiles.
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Affiliation(s)
- Scott Fleming
- WestCHEM/Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL, UK.
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