1
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Tarai A, Nath B. A review on oxime functionality: an ordinary functional group with significant impacts in supramolecular chemistry. Chem Commun (Camb) 2024; 60:7266-7287. [PMID: 38916274 DOI: 10.1039/d4cc01397b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
The oxime functional group is pivotal in chemistry, finding extensive applications in medical science, catalysis, organic functional group transformations, and the recognition of essential and toxic analytes. While the coordination chemistry of oxime derivatives has been thoroughly explored and several reviews have been published on this topic in reputable journals, a comprehensive review encompassing various aspects such as crystal engineering, cation and anion recognition, as well as coordination chemistry activities, is still in demand. This feature article highlights the diverse applications of oxime derivatives across multiple domains of chemistry, including medicine, agriculture, crystal engineering, coordination chemistry, and molecular recognition studies. Each of the oxime derivatives in this feature article are meticulously described in terms of their medicinal applications, crop protection, crystal engineering attributes, analyte recognition capabilities, and coordination chemistry aspects. By providing a comprehensive overview of their versatile applications, this article aims to inspire researchers to explore and develop novel oxime-based derivatives for future applications.
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Affiliation(s)
- Arup Tarai
- School of Advanced Sciences and Languages (SASL), VIT Bhopal University, Bhopal-466114, Madya Pradesh, India.
| | - Bhaskar Nath
- Department of Educational Sciences, Assam University Silchar, Assam-788011, India.
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2
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Wehrum S, Siukstaite L, Williamson DJ, Branson TR, Sych T, Madl J, Wildsmith GC, Dai W, Kempmann E, Ross JF, Thomsen M, Webb ME, Römer W, Turnbull WB. Membrane Fusion Mediated by Non-covalent Binding of Re-engineered Cholera Toxin Assemblies to Glycolipids. ACS Synth Biol 2022; 11:3929-3938. [PMID: 36367814 PMCID: PMC9764410 DOI: 10.1021/acssynbio.2c00266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Membrane fusion is essential for the transport of macromolecules and viruses across membranes. While glycan-binding proteins (lectins) often initiate cellular adhesion, subsequent fusion events require additional protein machinery. No mechanism for membrane fusion arising from simply a protein binding to membrane glycolipids has been described thus far. Herein, we report that a biotinylated protein derived from cholera toxin becomes a fusogenic lectin upon cross-linking with streptavidin. This novel reengineered protein brings about hemifusion and fusion of vesicles as demonstrated by mixing of fluorescently labeled lipids between vesicles as well as content mixing of liposomes filled with fluorescently labeled dextran. Exclusion of the complex at vesicle-vesicle interfaces could also be observed, indicating the formation of hemifusion diaphragms. Discovery of this fusogenic lectin complex demonstrates that new emergent properties can arise from simple changes in protein architecture and provides insights into new mechanisms of lipid-driven fusion.
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Affiliation(s)
- Sarah Wehrum
- Faculty
of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany,Bioss-Centre
for Biological Signalling Studies, Albert-Ludwigs-University
Freiburg, Schänzlestraße
18, 79104 Freiburg, Germany
| | - Lina Siukstaite
- Faculty
of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany,Bioss-Centre
for Biological Signalling Studies, Albert-Ludwigs-University
Freiburg, Schänzlestraße
18, 79104 Freiburg, Germany
| | - Daniel J. Williamson
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Thomas R. Branson
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Taras Sych
- Faculty
of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany,Bioss-Centre
for Biological Signalling Studies, Albert-Ludwigs-University
Freiburg, Schänzlestraße
18, 79104 Freiburg, Germany,Freiburg
Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany,Science
for Life Laboratory, Department of Women’s and Children’s
Health, Karolinska Institutet, 17165 Solna, Sweden
| | - Josef Madl
- Faculty
of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany,Bioss-Centre
for Biological Signalling Studies, Albert-Ludwigs-University
Freiburg, Schänzlestraße
18, 79104 Freiburg, Germany,Freiburg
Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Gemma C. Wildsmith
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Wenyue Dai
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Erik Kempmann
- Faculty
of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany,Bioss-Centre
for Biological Signalling Studies, Albert-Ludwigs-University
Freiburg, Schänzlestraße
18, 79104 Freiburg, Germany
| | - James F. Ross
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Maren Thomsen
- School of
Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Michael E. Webb
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..
| | - Winfried Römer
- Faculty
of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany,Bioss-Centre
for Biological Signalling Studies, Albert-Ludwigs-University
Freiburg, Schänzlestraße
18, 79104 Freiburg, Germany,Freiburg
Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany,
| | - W. Bruce Turnbull
- School
of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, U.K..,
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Devari S, Bhunia D, Bong D. Synthesis of Bifacial Peptide Nucleic Acids with Diketopiperazine Backbones. Synlett 2022; 33:965-968. [PMID: 35874045 PMCID: PMC9306277 DOI: 10.1055/a-1802-6873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We report a synthesis of bifacial peptide nucleic acids (bPNAs) with novel diketopiperazine (DKP) backbones that display unnatural melamine (M) bases, as well as native bases. To examine the structure-function scope of DKP bPNAs, we synthesized a set of bPNAs by using diaminopropionic acid, diaminobutyric acid, ornithine, and lysine derivatives to display the base-tripling motifs, which result in one, two, three, or four carbons linking the alpha carbon to the side-chain amine. Thermal denaturation of DNA hybrids with these bPNAs revealed that the optimal side-chain linkage was four carbons, corresponding to the lysine derivative. Accordingly, monomers displaying two bases per side-chain were prepared through double reductive alkylation of the ε-amine of Fmoc-lysine with acetaldehyde derivatives of adenine, cytidine, uridine, and melamine. With these building blocks in hand, DKP bPNAs were prepared to display a combination of native and synthetic (melamine) bases. Preliminary melting studies indicate binding signatures of cytidine- and melamine-displaying bPNAs to T-rich DNAs of noncanonical structure, though full characterization of this behavior is ongoing. The convenient and potentially scalable method described enables rapid access to DNA-binding scaffolds of low (<1 kD) molecular weight and previously established cell permeability. We expect that this straightforward and efficient approach to nucleic acid binders will enable studies on noncanonical nucleic acid hybridization.
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Affiliation(s)
- Shekaraiah Devari
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, USA
| | - Debmalya Bhunia
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, USA
| | - Dennis Bong
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, USA
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Dai S, Li M, Yan H, Zhu H, Hu H, Zhang Y, Cheng G, Yuan N, Ding J. Self-Healing Silicone Elastomer with Stable and High Adhesion in Harsh Environments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13696-13702. [PMID: 34758614 DOI: 10.1021/acs.langmuir.1c02356] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Adhesive and self-healing elastomers are urgently needed for their convenience and intelligence in biological medicine, flexible electronics, intelligent residential systems, etc. However, their inevitable use in harsh environments results in further enhancement requirements of the structure and performance of adhesive and self-healing elastomers. Herein, a novel self-healing and high-adhesion silicone elastomer was designed by the synergistic effect of multiple dynamic bonds. It revealed excellent stretchability (368%) and self-healing properties at room temperature (98.1%, 5 h) and in a water environment (96.4% for 5 h). Meanwhile, the resultant silicone elastomer exhibited high adhesion to metal and nonmetal and showed stable adhesion in harsh environments, such as under acidic (pH 1) and alkaline (pH 12) environments, salt water, petroleum ether, water, etc. Furthermore, it was applied as a shatter-proof protective layer and a rust-proof coating, proving its significant potential in intelligent residential system applications.
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Affiliation(s)
- Shengping Dai
- Institute of Intelligent flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Meng Li
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Hao Yan
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Hao Zhu
- Institute of Intelligent flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Hongwei Hu
- Institute of Intelligent flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yixing Zhang
- Institute of Intelligent flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Guanggui Cheng
- Institute of Intelligent flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Ningyi Yuan
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Jianning Ding
- Institute of Intelligent flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, P. R. China
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5
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Grochmal A, Woods B, Milanesi L, Perez-Soto M, Tomas S. How the biomimetic assembly of membrane receptors into multivalent domains is regulated by a small ligand. Chem Sci 2021; 12:7800-7808. [PMID: 34168834 PMCID: PMC8188472 DOI: 10.1039/d1sc01598b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 04/30/2021] [Indexed: 11/21/2022] Open
Abstract
In living cells, communication requires the action of membrane receptors that are activated following very small environmental changes. A binary all-or-nothing behavior follows, making the organism extremely efficient at responding to specific stimuli. Using a minimal system composed of lipid vesicles, chemical models of a membrane receptor and their ligands, we show that bio-mimetic ON/OFF assembly of high avidity, multivalent domains is triggered by small temperature changes. Moreover, the intensity of the ON signal at the onset of the switch is modulated by the presence of small, weakly binding divalent ligands, reminiscent of the action of primary messengers in biological systems. Based on the analysis of spectroscopic data, we develop a mathematical model that rigorously describes the temperature-dependent switching of the membrane receptor assembly and ligand binding. From this we derive an equation that predicts the intensity of the modulation of the ON signal by the ligand-messenger as a function of the pairwise binding parameters, the number of binding sites that it features and the concentration. The behavior of our system, and the model derived, highlight the usefulness of weakly binding ligands in the regulation of membrane receptors and the pitfalls inherent to their binding promiscuity, such as non-specific binding to the membrane. Our model, and the equations derived from it, offer a valuable tool for the study of membrane receptors in both biological and biomimetic settings. The latter can be exploited to program membrane receptor avidity on sensing vesicles, create hierarchical protocell tissues or develop highly specific drug delivery vehicles.
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Affiliation(s)
- Anna Grochmal
- Department of Biological Sciences, Institute of Structural and Molecular Biology, School of Science, Birkbeck University of London Malet Street London WC1E 7HX UK
| | - Ben Woods
- Department of Biological Sciences, Institute of Structural and Molecular Biology, School of Science, Birkbeck University of London Malet Street London WC1E 7HX UK
| | - Lilia Milanesi
- Department of Biological Sciences, Institute of Structural and Molecular Biology, School of Science, Birkbeck University of London Malet Street London WC1E 7HX UK
| | - Manuel Perez-Soto
- Department of Biological Sciences, Institute of Structural and Molecular Biology, School of Science, Birkbeck University of London Malet Street London WC1E 7HX UK
| | - Salvador Tomas
- Department of Biological Sciences, Institute of Structural and Molecular Biology, School of Science, Birkbeck University of London Malet Street London WC1E 7HX UK
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6
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Liu Y, Castro Bravo KM, Liu J. Targeted liposomal drug delivery: a nanoscience and biophysical perspective. NANOSCALE HORIZONS 2021; 6:78-94. [PMID: 33400747 DOI: 10.1039/d0nh00605j] [Citation(s) in RCA: 114] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Liposomes are a unique platform for drug delivery, and a number of liposomal formulations have already been commercialized. Doxil is a representative example, which uses PEGylated liposomes to load doxorubicin for cancer therapy. Its delivery relies on the enhanced permeability and retention (EPR) effect or passive targeting. Drug loading can be achieved using both standard liposomes and also those containing a solid core such as mesoporous silica and poly(lactide-co-glycolide) (PLGA). Developments have also been made on active targeted delivery using bioaffinity ligands such as small molecules, antibodies, peptides and aptamers. Compared to other types of nanoparticles, the surface of liposomes is fluid, allowing dynamic organization of targeting ligands to achieve optimal binding to cell surface receptors. This review article summarizes development of liposomal targeted drug delivery systems, with an emphasis on the biophysical properties of lipids. In both passive and active targeting, the effects of liposome size, charge, fluidity, rigidity, head-group chemistry and PEGylation are discussed along with recent examples. Most of the examples are focused on targeting tumors or cancer cells. Finally, a few examples of commercialized formulations are described, and some future research opportunities are discussed.
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Affiliation(s)
- Yibo Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
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7
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Miao S, Liang Y, Rundell S, Bhunia D, Devari S, Munyaradzi O, Bong D. Unnatural bases for recognition of noncoding nucleic acid interfaces. Biopolymers 2021; 112:e23399. [PMID: 32969496 PMCID: PMC7855516 DOI: 10.1002/bip.23399] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/14/2020] [Accepted: 08/25/2020] [Indexed: 12/20/2022]
Abstract
The notion of using synthetic heterocycles instead of the native bases to interface with DNA and RNA has been explored for nearly 60 years. Unnatural bases compatible with the DNA/RNA coding interface have the potential to expand the genetic code and co-opt the machinery of biology to access new macromolecular function; accordingly, this body of research is core to synthetic biology. While much of the literature on artificial bases focuses on code expansion, there is a significant and growing effort on docking synthetic heterocycles to noncoding nucleic acid interfaces; this approach seeks to illuminate major processes of nucleic acids, including regulation of transcription, translation, transport, and transcript lifetimes. These major avenues of research at the coding and noncoding interfaces have in common fundamental principles in molecular recognition. Herein, we provide an overview of foundational literature in biophysics of base recognition and unnatural bases in coding to provide context for the developing area of targeting noncoding nucleic acid interfaces with synthetic bases, with a focus on systems developed through iterative design and biophysical study.
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Affiliation(s)
- Shiqin Miao
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Yufeng Liang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Sarah Rundell
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Debmalya Bhunia
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Shekar Devari
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Oliver Munyaradzi
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Dennis Bong
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, USA
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8
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Abstract
Liposomes are well-investigated drug or gene delivery vehicles for chemotherapy, used by taking advantage of their biocompatibility and biodegradability. A central question on the construction of intracellular liposomal delivery systems is to entrap the liposomes of interest in the highly acidic and proteolytic endosomal environment. In the other words, it is essential that the liposomes release a therapeutic drug into the cytosol before they are degraded in the endosome. As a strategy to enhance the endosome escape, the self-lytic liposomes with acidic pH-selective membrane active polypeptide are considered highly effective. Here, an acidic pH-selective membrane-lytic polypeptide (LPE) and its retro isomer (rLPE) were designed, and then their membrane-lytic activities against EggPC liposomes were determined. It was noticed that the rLPE polypeptide showed an increase in activity compared with the LPE polypeptide. Furthermore, the rLPE polypeptide was conjugated to liposomes via a flexible Gly-Gly-Gly-Gly linker to facilitate the pH-selective content release. The rLPE anchoring liposomes exhibited distinctly different contents release behavior at physiological and endosomal pHs, namely typical contents release from liposomes was positively observed at acidic pH range. The overarching goal of this paper is to develop efficient pH-selective therapeutic delivery systems by using our findings.
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Engineering of stimuli-responsive lipid-bilayer membranes using supramolecular systems. Nat Rev Chem 2020; 5:46-61. [PMID: 37118103 DOI: 10.1038/s41570-020-00233-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2020] [Indexed: 12/13/2022]
Abstract
The membrane proteins found in nature control many important cellular functions, including signal transduction and transmembrane ion transport, and these, in turn, are regulated by external stimuli, such as small molecules, membrane potential and light. Membrane proteins also find technological applications in fields ranging from optogenetics to synthetic biology. Synthetic supramolecular analogues have emerged as a complementary method to engineer functional membranes. This Review describes stimuli-responsive supramolecular systems developed for the control of ion transport, signal transduction and catalysis in lipid-bilayer-membrane systems. Recent advances towards achieving spatio-temporal control over activity in artificial and living cells are highlighted. Current challenges, the scope, limitations and future potential to exploit supramolecular systems for engineering stimuli-responsive lipid-bilayer membranes are discussed.
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Abstract
The combination of supramolecular functional systems with biomolecular chemistry has been a fruitful exercise for decades, leading to a greater understanding of biomolecules and to a great variety of applications, for example, in drug delivery and sensing. Within these developments, the phospholipid bilayer membrane, surrounding live cells, with all its functions has also intrigued supramolecular chemists. Herein, recent efforts from the supramolecular chemistry community to mimic natural functions of lipid membranes, such as sensing, molecular recognition, membrane fusion, signal transduction, and gated transport, are reviewed.
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Affiliation(s)
- Andrea Barba‐Bon
- Department of Life Sciences and ChemistryJacobs University BremenCampus Ring 128759BremenGermany
| | - Mohamed Nilam
- Department of Life Sciences and ChemistryJacobs University BremenCampus Ring 128759BremenGermany
| | - Andreas Hennig
- Department of Life Sciences and ChemistryJacobs University BremenCampus Ring 128759BremenGermany
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Omidvar R, Römer W. Glycan-decorated protocells: novel features for rebuilding cellular processes. Interface Focus 2019; 9:20180084. [PMID: 30842879 PMCID: PMC6388021 DOI: 10.1098/rsfs.2018.0084] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2019] [Indexed: 02/06/2023] Open
Abstract
In synthetic biology approaches, lipid vesicles are widely used as protocell models. While many compounds have been encapsulated in vesicles (e.g. DNA, cytoskeleton and enzymes), the incorporation of glycocalyx components in the lipid bilayer has attracted much less attention so far. In recent years, glycoconjugates have been integrated in the membrane of giant unilamellar vesicles (GUVs). These minimal membrane systems have largely contributed to shed light on the molecular mechanisms of cellular processes. In this review, we first introduce several preparation and biophysical characterization methods of GUVs. Then, we highlight specific applications of protocells investigating glycolipid-mediated endocytosis of toxins, viruses and bacteria. In addition, we delineate how prototissues have been assembled from glycan-decorated protocells by using lectin-mediated cross-linking of opposed glycoreceptors (e.g. glycolipids and glycopeptides). In future applications, glycan-decorated protocells might be useful for investigating cell-cell interactions (e.g. adhesion and communication). We also speculate about the implication of lectin-glycoreceptor interactions in membrane fusion processes.
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Affiliation(s)
- Ramin Omidvar
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, Albert-Ludwigs-University Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Winfried Römer
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, Albert-Ludwigs-University Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
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12
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Du G, Lou L, Guan S, Peng Y, Qiao H, Liu P, Wu D. Controllable and large-scale supramolecular vesicle aggregation: orthogonal light-responsive host–guest and metal–ligand interactions. J Mater Chem B 2019. [DOI: 10.1039/c9tb00693a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
On the basis of the host–guest molecular recognition interaction between β-cyclodextrin and azobenzene, two kinds of supramolecular self-assemblies (Py-CD⊃Azo-C and Py-CD⊃Azo-C3) were constructed.
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Affiliation(s)
- Guangyan Du
- College of Materials Science and Engineering
- Zhejiang University of Technology
- Hangzhou City 310014
- P. R. China
- College of Chemistry and Chemical Engineering
| | - Lingyun Lou
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu City 610500
- P. R. China
| | - Shuwen Guan
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu City 610500
- P. R. China
| | - Yuanyuan Peng
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu City 610500
- P. R. China
| | - Hongwei Qiao
- Shandong Tengxi New Materials Co., Ltd
- Taian City 271000
- P. R. China
| | - Pingli Liu
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
- Southwest Petroleum University
- Chengdu City 610500
- P. R. China
| | - Dan Wu
- College of Materials Science and Engineering
- Zhejiang University of Technology
- Hangzhou City 310014
- P. R. China
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13
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Unexpected aminolysis reaction of 2-methyl-2,3-dihydroimidazo[2,1-b][1,3]thiazol-5(6Н)-one. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2365-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Peptide-Mediated Liposome Fusion: The Effect of Anchor Positioning. Int J Mol Sci 2018; 19:ijms19010211. [PMID: 29320427 PMCID: PMC5796160 DOI: 10.3390/ijms19010211] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/02/2018] [Accepted: 01/08/2018] [Indexed: 11/17/2022] Open
Abstract
A minimal model system for membrane fusion, comprising two complementary peptides dubbed "E" and "K" joined to a cholesterol anchor via a polyethyleneglycol spacer, has previously been developed in our group. This system promotes the fusion of large unilamellar vesicles and facilitates liposome-cell fusion both in vitro and in vivo. Whilst several aspects of the system have previously been investigated to provide an insight as to how fusion is facilitated, anchor positioning has not yet been considered. In this study, the effects of placing the anchor at either the N-terminus or in the center of the peptide are investigated using a combination of circular dichroism spectroscopy, dynamic light scattering, and fluorescence assays. It was discovered that anchoring the "K" peptide in the center of the sequence had no effect on its structure, its ability to interact with membranes, or its ability to promote fusion, whereas anchoring the 'E' peptide in the middle of the sequence dramatically decreases fusion efficiency. We postulate that anchoring the 'E' peptide in the middle of the sequence disrupts its ability to form homodimers with peptides on the same membrane, leading to aggregation and content leakage.
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15
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Saha A, Panda S, Pradhan N, Kalita K, Trivedi V, Manna D. Azidophosphonate Chemistry as a Route for a Novel Class of Vesicle-Forming Phosphonolipids. Chemistry 2017; 24:1121-1127. [DOI: 10.1002/chem.201704000] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Abhishek Saha
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati- 781039, Assam India
| | - Subhankar Panda
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati- 781039, Assam India
| | - Nirmalya Pradhan
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati- 781039, Assam India
| | - Kangkan Kalita
- Department of Bioscience and Bioengineering; Indian Institute of Technology Guwahati; Guwahati- 781039, Assam India
| | - Vishal Trivedi
- Department of Bioscience and Bioengineering; Indian Institute of Technology Guwahati; Guwahati- 781039, Assam India
| | - Debasis Manna
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati- 781039, Assam India
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16
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Yang J, Tu J, Lamers GEM, Olsthoorn RCL, Kros A. Membrane Fusion Mediated Intracellular Delivery of Lipid Bilayer Coated Mesoporous Silica Nanoparticles. Adv Healthc Mater 2017; 6. [PMID: 28945015 DOI: 10.1002/adhm.201700759] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/10/2017] [Indexed: 01/07/2023]
Abstract
Protein delivery into the cytosol of cells is a challenging topic in the field of nanomedicine, because cellular uptake and endosomal escape are typically inefficient, hampering clinical applications. In this contribution cuboidal mesoporous silica nanoparticles (MSNs) containing disk-shaped cavities with a large pore diameter (10 nm) are studied as a protein delivery vehicle using cytochrome-c (cytC) as a model membrane-impermeable protein. To ensure colloidal stability, the MSNs are coated with a fusogenic lipid bilayer (LB) and cellular uptake is induced by a complementary pair of coiled-coil (CC) lipopeptides. Coiled-coil induced membrane fusion leads to the efficient cytosolic delivery of cytC and triggers apoptosis of cells. Delivery of these LB coated MSNs in the presence of various endocytosis inhibitors strongly suggests that membrane fusion is the dominant mechanism of cellular uptake. This method is potentially a universal way for the efficient delivery of any type of inorganic nanoparticle or protein into cells mediated by CC induced membrane fusion.
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Affiliation(s)
- Jian Yang
- Department of Supramolecular & Biomaterials Chemistry; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 Leiden 2300 RA The Netherlands
| | - Jing Tu
- Department of Supramolecular & Biomaterials Chemistry; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 Leiden 2300 RA The Netherlands
| | - Gerda E. M. Lamers
- Institute of Biology; Leiden University; Sylviusweg 72 Leiden 2333 BE The Netherlands
| | - René C. L. Olsthoorn
- Department of Supramolecular & Biomaterials Chemistry; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 Leiden 2300 RA The Netherlands
| | - Alexander Kros
- Department of Supramolecular & Biomaterials Chemistry; Leiden Institute of Chemistry; Leiden University; Einsteinweg 55 Leiden 2300 RA The Netherlands
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17
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Petelski AN, Peruchena NM, Pamies SC, Sosa GL. Insights into the self-assembly steps of cyanuric acid toward rosette motifs: a DFT study. J Mol Model 2017; 23:263. [PMID: 28808800 DOI: 10.1007/s00894-017-3428-3] [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: 02/10/2017] [Accepted: 07/19/2017] [Indexed: 11/28/2022]
Abstract
The nature of non-covalent interactions in self-assembling systems is a topic that has aroused great attention in literature. In this field, the 1,3,5-triazinane-2,4,6-trione or cyanuric acid (CA) is one of the most widely used molecules to formulate self-assembled materials or monolayers. In the present work, a variety of molecular aggregates of CA are examined using three different DFT functionals (B3LYP, B3LYP-D3, and ω-B97XD) in the framework of the quantum theory of atoms in molecules (QTAIM) and natural bond orbital (NBO) analysis. Herein, a step by step aggregation path is proposed and the origin of cooperative effects is also examined. It is shown that a greater cooperativity is not always associated with a greater binding energy, and the greatest cooperative effect occurs with highly directional hydrogen bonds. The intramolecular charge transfers play a key role in this effect. Graphical abstract The noncovalent interactions in cyanuric acid supramolecules were analyzed. The calculations provide insights into the self-assembly steps from dimers to rosette-like motif. The complexes with collinear hydrogen bonds show positive cooperativity, while in the arrangement with double hydrogen bonds the cooperative effect is essentially zero.
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Affiliation(s)
- Andre N Petelski
- Grupo de Investigación en Química Teórica y Experimental (QuiTEx), Departamento de Ingeniería Química, Facultad Regional Resistencia, Universidad Tecnológica Nacional, French 414 (H3500CHJ), Resistencia, Chaco, Argentina.,Instituto de Química Básica y Aplicada del Nordeste Argentino (IQUIBA-NEA), UNNE-CONICET, Avenida Libertad 5460 (3400), Corrientes, Argentina
| | - Nélida M Peruchena
- Instituto de Química Básica y Aplicada del Nordeste Argentino (IQUIBA-NEA), UNNE-CONICET, Avenida Libertad 5460 (3400), Corrientes, Argentina. .,Laboratorio de Estructura Molecular y Propiedades (LEMYP), Área de Química Física, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Avenida Libertad 5460 (3400), Corrientes, Argentina.
| | - Silvana C Pamies
- Grupo de Investigación en Química Teórica y Experimental (QuiTEx), Departamento de Ingeniería Química, Facultad Regional Resistencia, Universidad Tecnológica Nacional, French 414 (H3500CHJ), Resistencia, Chaco, Argentina
| | - Gladis L Sosa
- Grupo de Investigación en Química Teórica y Experimental (QuiTEx), Departamento de Ingeniería Química, Facultad Regional Resistencia, Universidad Tecnológica Nacional, French 414 (H3500CHJ), Resistencia, Chaco, Argentina. .,Instituto de Química Básica y Aplicada del Nordeste Argentino (IQUIBA-NEA), UNNE-CONICET, Avenida Libertad 5460 (3400), Corrientes, Argentina.
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18
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Wehland JD, Lygina AS, Kumar P, Guha S, Hubrich BE, Jahn R, Diederichsen U. Role of the transmembrane domain in SNARE protein mediated membrane fusion: peptide nucleic acid/peptide model systems. MOLECULAR BIOSYSTEMS 2017; 12:2770-6. [PMID: 27345759 DOI: 10.1039/c6mb00294c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fusion of synaptic vesicles with the presynaptic plasma membrane is mediated by Soluble NSF (N-ethylmaleimide-sensitive factor) Attachment Protein Receptor proteins also known as SNAREs. The backbone of this essential process is the assembly of SNAREs from opposite membranes into tight four helix bundles forcing membranes in close proximity. With model systems resembling SNAREs with reduced complexity we aim to understand how these proteins work at the molecular level. Here, peptide nucleic acids (PNAs) are used as excellent candidates for mimicking the SNARE recognition motif by forming well-characterized duplex structures. Hybridization between complementary PNA strands anchored in liposomes through native transmembrane domains (TMDs) induces the merger of the outer leaflets of the participating vesicles but not of the inner leaflets. A series of PNA/peptide hybrids differing in the length of TMDs and charges at the C-terminal end is presented. Interestingly, mixing of both outer and inner leaflets is seen for TMDs containing an amide in place of the natural carboxylic acid at the C-terminal end. Charged side chains at the C-terminal end of the TMDs are shown to have a negative impact on the mixing of liposomes. The length of the TMDs is vital for fusion as with the use of shortened TMDs, fusion was completely prevented.
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Affiliation(s)
- Jan-Dirk Wehland
- Institute of Organic and Biomolecular Chemistry, Georg-August-University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
| | - Antonina S Lygina
- Institute of Organic and Biomolecular Chemistry, Georg-August-University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
| | - Pawan Kumar
- Institute of Organic and Biomolecular Chemistry, Georg-August-University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
| | - Samit Guha
- Institute of Organic and Biomolecular Chemistry, Georg-August-University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
| | - Barbara E Hubrich
- Institute of Organic and Biomolecular Chemistry, Georg-August-University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
| | - Reinhard Jahn
- Department of Neurobiology, Max-Planck-Institute of Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Ulf Diederichsen
- Institute of Organic and Biomolecular Chemistry, Georg-August-University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
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19
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Wang L, Neal T, Chen S, Badjić JD. Multivalent and Photoresponsive Assembly of Dual-Cavity Baskets in Water. Chemistry 2017; 23:8829-8833. [PMID: 28608593 DOI: 10.1002/chem.201701996] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Indexed: 01/21/2023]
Abstract
Large unilamellar vesicles [1]n , composed of bolaamphiphilic baskets 1, were found to complex photoresponsive guest 3 and divalent 4 to, respectively, give stable vesicular assemblies [12 -3]n and [12 -43 ]n . With the assistance of 1 H NMR spectroscopy, electron microscopy, and dynamic light scattering, it was deduced that [12 -3]n vesicles comprise ternary [12 -3] organized into a curved membrane in which a pair of baskets entraps a laterally positioned dicationic 3. In the case of [12 -43 ]n vesicles, however, the spectroscopic results suggest that three guest molecules 4 insert vertically between four baskets 1 to give pentanary [12 -43 ] packed into the membrane of [12 -43 ]n . Importantly, nanostructured [12 -3]n and [12 -43 ]n retain rhodamine B (RhB) in their reservoir (fluorescence microscopy) and can be switched from one into another using UV light, with a disproportionate release of RhB dye. The reported complexes, organized into photoresponsive capsular materials, are rather unprecedented, demonstrating the potential of multivalency for creating functional structures of great interest in the areas of catalysis and delivery.
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Affiliation(s)
- Lu Wang
- Institute for Advanced Studies, Wuhan University, No. 299 Bayi Road, Wuhan, Hubei, 430072, P. R. China.,Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43228, USA
| | - Taylor Neal
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43228, USA
| | - Shigui Chen
- Institute for Advanced Studies, Wuhan University, No. 299 Bayi Road, Wuhan, Hubei, 430072, P. R. China.,Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43228, USA
| | - Jovica D Badjić
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43228, USA
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20
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Whitehead SA, McNitt CD, Mattern-Schain SI, Carr AJ, Alam S, Popik VV, Best MD. Artificial Membrane Fusion Triggered by Strain-Promoted Alkyne-Azide Cycloaddition. Bioconjug Chem 2017; 28:923-932. [PMID: 28248084 PMCID: PMC5990007 DOI: 10.1021/acs.bioconjchem.6b00578] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Artificial systems for controlled membrane fusion applicable for drug delivery would ideally use triggers that are orthogonal to biology. To apply the strain-promoted alkyne-azide cycloaddition (SPAAC) to drive membrane fusion, oxo-dibenzocyclooctyne (ODIBO)-lipid 1 was designed, synthesized, and studied alongside azadibenzocyclooctyne (ADIBO)-lipids 2-4 to assess fusion with liposomes containing azido-lipid 5. Lipids 1-2 were first shown to be effective for liposome derivatization. Next, fusion was evaluated using liposomes containing 1 and varying ratios of PC and PE via a FRET dilution fusion assay, and a 1:1 PC-to-PE ratio yielded the greatest signal change attributed to fusion. Finally, lipids 1-4 were compared, and 1 yielded the greatest triggering of fusion, while 2-4 yielded varying efficacies depending on the structural features of each lipid. Fusion was further validated through STEM studies showing larger multilamellar assemblies after liposome mixing, and FRET assay results supporting the mixing of liposome aqueous contents. This work provides a platform for triggered fusion toward drug delivery applications and an understanding of the effects of lipid structure and membrane composition on fusion.
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Affiliation(s)
- Stuart A Whitehead
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Christopher D McNitt
- Department of Chemistry, The University of Georgia , Athens, Georgia 30602, United States
| | - Samuel I Mattern-Schain
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Adam J Carr
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Shahrina Alam
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Vladimir V Popik
- Department of Chemistry, The University of Georgia , Athens, Georgia 30602, United States
| | - Michael D Best
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
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21
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Evolution of the hydrogen-bonding motif in the melamine-cyanuric acid co-crystal: a topological study. J Mol Model 2016; 22:202. [PMID: 27491851 DOI: 10.1007/s00894-016-3070-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 07/10/2016] [Indexed: 11/27/2022]
Abstract
The melamine (M)/cyanuric acid (CA) supramolecular system is perhaps one of the most exploited in the field of self-assembly because of the high complementarity of the components. However, it is necessary to investigate further the factors involved in the assembly process. In this study, we analyzed a set of 13 M n /CA m clusters (with n , m = 1, 2, 3), taken from crystallographic data, to characterize the nature of the hydrogen bonds involved in the self-assembly of these components as well as to provide greater understanding of the phenomenon. The calculations were performed at the B3LYP/6-311++G(d,p) and ω-B97XD (single point) levels of theory, and the interactions were analyzed within the framework of the quantum theory of atoms in molecules and by means of molecular electrostatic potential maps. Our results show that the stablest structure is the rosette-type motif and the aggregation mechanism is governed by a combination of cooperative and anticooperative effects. Our topological results explain the polymorphism in the self-assembly of coadsorbed monolayers of M and CA. Graphical abstract The aggregation steps of the melamine-cyanuric co-crystal is driven by a hydrogen-bonded network which is governed by a complex combination of cooperative and anticooperative effects.
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22
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Lombardo D, Calandra P, Barreca D, Magazù S, Kiselev MA. Soft Interaction in Liposome Nanocarriers for Therapeutic Drug Delivery. NANOMATERIALS (BASEL, SWITZERLAND) 2016; 6:E125. [PMID: 28335253 PMCID: PMC5224599 DOI: 10.3390/nano6070125] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 06/14/2016] [Accepted: 06/17/2016] [Indexed: 01/19/2023]
Abstract
The development of smart nanocarriers for the delivery of therapeutic drugs has experienced considerable expansion in recent decades, with the development of new medicines devoted to cancer treatment. In this respect a wide range of strategies can be developed by employing liposome nanocarriers with desired physico-chemical properties that, by exploiting a combination of a number of suitable soft interactions, can facilitate the transit through the biological barriers from the point of administration up to the site of drug action. As a result, the materials engineer has generated through the bottom up approach a variety of supramolecular nanocarriers for the encapsulation and controlled delivery of therapeutics which have revealed beneficial developments for stabilizing drug compounds, overcoming impediments to cellular and tissue uptake, and improving biodistribution of therapeutic compounds to target sites. Herein we present recent advances in liposome drug delivery by analyzing the main structural features of liposome nanocarriers which strongly influence their interaction in solution. More specifically, we will focus on the analysis of the relevant soft interactions involved in drug delivery processes which are responsible of main behaviour of soft nanocarriers in complex physiological fluids. Investigation of the interaction between liposomes at the molecular level can be considered an important platform for the modeling of the molecular recognition processes occurring between cells. Some relevant strategies to overcome the biological barriers during the drug delivery of the nanocarriers are presented which outline the main structure-properties relationships as well as their advantages (and drawbacks) in therapeutic and biomedical applications.
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Affiliation(s)
- Domenico Lombardo
- National Research Council, Institute for Chemical and Physical Processes, Messina 98158, Italy.
| | - Pietro Calandra
- National Research Council, Institute of Nanostructured Materials, Roma 00015, Italy.
| | - Davide Barreca
- Department of Chemical Sciences, biological, pharmaceutical and environmental, University of Messina, Messina 98166, Italy.
| | - Salvatore Magazù
- Department of Physics and Earth Sciences, University of Messina, Messina 98166, Italy.
| | - Mikhail A Kiselev
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Moscow 141980, Russia.
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23
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Pratumyot Y, Torres OB, Bong D. Assessment of RNA carrier function in peptide amphiphiles derived from the HIV fusion peptide. Peptides 2016; 79:27-30. [PMID: 26988874 PMCID: PMC4842095 DOI: 10.1016/j.peptides.2016.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 03/08/2016] [Accepted: 03/10/2016] [Indexed: 10/22/2022]
Abstract
A small library of amphiphilic peptides has been evaluated for duplex RNA carrier function into A549 cells. We studied peptides in which a C-terminal 7-residue cationic domain is attached to a neutral/hydrophobic 23-residue domain that is based on the viral fusion peptide of HIV. We also examined peptides in which the cationic charge was evenly distributed throughout the peptide. Strikingly, subtle sequence variations in the hydrophobic domain that do not alter net hydrophobicity result in wide variation in RNA uptake. Additionally, cyclic cystine variants are much less active as RNA carriers than their open-chain cysteine analogs. With regard to electrostatic effects, we find that lysine is less effective than arginine in facilitating uptake, and that even distribution of cationic residues throughout the peptide sequence results in especially effective RNA carrier function. Overall, minor changes in peptide hydrophobicity, flexibility and charge distribution can significantly alter carrier function. We hypothesize this is due to altered properties of the peptide-RNA assembly rather than peptide secondary structure.
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Affiliation(s)
- Yaowalak Pratumyot
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, OH 43210, United States
| | - Oscar B Torres
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, OH 43210, United States
| | - Dennis Bong
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, OH 43210, United States.
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24
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Sadek M, Berndt D, Milovanovic D, Jahn R, Diederichsen U. Distance Regulated Vesicle Fusion and Docking Mediated by β-Peptide Nucleic Acid SNARE Protein Analogues. Chembiochem 2016; 17:479-85. [PMID: 26879104 DOI: 10.1002/cbic.201500517] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Indexed: 11/07/2022]
Abstract
Artificial SNARE analogues derived from SNARE proteins, which mediate synaptic membrane fusion, are of interest. They mimic the tetrameric α-helix bundle of the SNARE motif with various bio-oligomer recognition units. Interaction between complementary oligomers linked to the respective membrane by lipid or peptide anchors leads to proximity of vesicles and to fusion of lipid bilayers. β-Peptide nucleic acids were introduced as hybrid oligomers with the native SNARE protein transmembrane/linker sequence, in order to evaluate a fusion system that allows distance tuning of approaching membranes. Formation of a four-base pair β-PNA double strand with 20 Å length is sufficient for vesicle membrane fusion. Elongation of the recognition β-PNA duplex in the linker region yielded a 40 Å β-peptide duplex and provided a vesicle-vesicle distance that only supported hemifusion of vesicle membranes.
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Affiliation(s)
- Muheeb Sadek
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Daniel Berndt
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Dragomir Milovanovic
- Abteilung Neurobiologie, Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, 37077, Göttingen, Germany
| | - Reinhard Jahn
- Abteilung Neurobiologie, Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, 37077, Göttingen, Germany
| | - Ulf Diederichsen
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany.
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25
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Saha A, Panda S, Paul S, Manna D. Phosphate bioisostere containing amphiphiles: a novel class of squaramide-based lipids. Chem Commun (Camb) 2016; 52:9438-41. [DOI: 10.1039/c6cc04089f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We describe a novel class of amphiphiles with squaramide moiety as a phosphate bioisostere.
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Affiliation(s)
- Abhishek Saha
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Subhankar Panda
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Saurav Paul
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Debasis Manna
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
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26
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Luo W, Westcott N, Dutta D, Pulsipher A, Rogozhnikov D, Chen J, Yousaf MN. A Dual Receptor and Reporter for Multi-Modal Cell Surface Engineering. ACS Chem Biol 2015. [PMID: 26204094 DOI: 10.1021/acschembio.5b00137] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The rapid development of new small molecule drugs, nanomaterials, and genetic tools to modulate cellular function through cell surface manipulation has revolutionized the diagnosis, study, and treatment of disorders in human health. Since the cell membrane is a selective gateway barrier that serves as the first line of defense/offense and communication to its environment, new approaches that molecularly engineer or tailor cell membrane surfaces would allow for a new era in therapeutic design, therapeutic delivery, complex coculture tissue construction, and in situ imaging probe tracking technologies. In order to develop the next generation of multimodal therapies, cell behavior studies, and biotechnologies that focus on cell membrane biology, new tools that intersect the fields of chemistry, biology, and engineering are required. Herein, we develop a liposome fusion and delivery strategy to present a novel dual receptor and reporter system at cell surfaces without the use of molecular biology or metabolic biosynthesis. The cell surface receptor is based on bio-orthogonal functional groups that can conjugate a range of ligands while simultaneously reporting the conjugation through the emission of fluorescence. We demonstrate this dual receptor and reporter system by conjugating and tracking various cell surface ligands for temporal control of cell fluorescent signaling, cell-cell interaction, and tissue assembly construction.
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Affiliation(s)
- Wei Luo
- Department
of Chemistry, York University, Toronto, Ontario M3J 1P3 Canada
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Nathan Westcott
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Debjit Dutta
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Abigail Pulsipher
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Dmitry Rogozhnikov
- Department
of Chemistry, York University, Toronto, Ontario M3J 1P3 Canada
| | - Jean Chen
- Department
of Chemistry, York University, Toronto, Ontario M3J 1P3 Canada
| | - Muhammad N. Yousaf
- Department
of Chemistry, York University, Toronto, Ontario M3J 1P3 Canada
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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27
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Zhou Z, Xia X, Bong D. Synthetic Polymer Hybridization with DNA and RNA Directs Nanoparticle Loading, Silencing Delivery, and Aptamer Function. J Am Chem Soc 2015; 137:8920-3. [PMID: 26138550 DOI: 10.1021/jacs.5b05481] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report herein discrete triplex hybridization of DNA and RNA with polyacrylates. Length-monodisperse triazine-derivatized polymers were prepared on gram-scale by reversible addition-fragmentation chain-transfer polymerization. Despite stereoregio backbone heterogeneity, the triazine polymers bind T/U-rich DNA or RNA with nanomolar affinity upon mixing in a 1:1 ratio, as judged by thermal melts, circular dichroism, gel-shift assays, and fluorescence quenching. We call these polyacrylates "bifacial polymer nucleic acids" (bPoNAs). Nucleic acid hybridization with bPoNA enables DNA loading onto polymer nanoparticles, siRNA silencing delivery, and can further serve as an allosteric trigger of RNA aptamer function. Thus, bPoNAs can serve as tools for both non-covalent bioconjugation and structure-function nucleation. It is anticipated that bPoNAs will have utility in both bio- and nanotechnology.
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Affiliation(s)
- Zhun Zhou
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Xin Xia
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Dennis Bong
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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28
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Kumar P, Guha S, Diederichsen U. SNARE protein analog-mediated membrane fusion. J Pept Sci 2015; 21:621-9. [DOI: 10.1002/psc.2773] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 02/26/2015] [Accepted: 03/02/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Pawan Kumar
- Institut für Organische und Biomolekulare Chemie; Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Samit Guha
- Institut für Organische und Biomolekulare Chemie; Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Ulf Diederichsen
- Institut für Organische und Biomolekulare Chemie; Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
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29
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Piao X, Xia X, Mao J, Bong D. Peptide Ligation and RNA Cleavage via an Abiotic Template Interface. J Am Chem Soc 2015; 137:3751-4. [PMID: 25747470 DOI: 10.1021/jacs.5b00236] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Xijun Piao
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Xin Xia
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Jie Mao
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Dennis Bong
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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30
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Sun L, Zhao H. Cleavage of diblock copolymer brushes in a selective solvent and fusion of vesicles self-assembled by pinned micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1867-1873. [PMID: 25625528 DOI: 10.1021/la5040036] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Lipid membrane fusion is a fundamental process in nature. In the fusion process two distinct bilayers merge the hydrophobic layers, and an interconnected structure is produced. In this research, the fusion of polymer membrane self-assembled by cleaved pinned micelles is investigated. Disulfide-tethered poly(tert-butyl acrylate-block-styrene) diblock copolymer brushes on the surfaces of silica particles were prepared by the "grafting to" or "grafting from" method. In acetone, the diblock copolymer brushes self-assemble into pinned micelles. Upon cleavage from the surfaces of the silica particles with n-tributylphosphine, the pinned micelles self-assemble into vesicles. In the meanwhile, thiol groups at the ends of the block copolymer brushes were produced in the cleavage reaction. Because of the oxidation of the thiol groups and the formation of the disulfide bonds, the vesicle structures are fused into bigger hollow structures and fiber-like structures. The further fusion of the fiber-like structures results in precipitation of the polymer from the solution.
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Affiliation(s)
- Lichao Sun
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
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31
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Liu L, Wu L, Tan J, Wang L, Liu Q, Liu P, Liu L. “Reduction” responsive thymine-conjugated biodynamers: synthesis and solution properties. Polym Chem 2015. [DOI: 10.1039/c5py00200a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nucleobase-conjugated biodynamers are generated by RAFT polymerization and the transthioesterification reaction. The biodynamers containing thioester linkages demonstrate GSH-responsive feature, and can interact with melamine and ATP in water.
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Affiliation(s)
- Lingzhi Liu
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Libin Wu
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Junyan Tan
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Lin Wang
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Qing Liu
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Pingwei Liu
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Li Liu
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
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32
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Vagenende V, Ching TJ, Chua RJ, Jiang QZ, Gagnon P. Self-assembly of lipopolysaccharide layers on allantoin crystals. Colloids Surf B Biointerfaces 2014; 120:8-14. [DOI: 10.1016/j.colsurfb.2014.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 03/28/2014] [Accepted: 04/11/2014] [Indexed: 02/07/2023]
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33
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Xia X, Piao X, Bong D. Bifacial peptide nucleic acid as an allosteric switch for aptamer and ribozyme function. J Am Chem Soc 2014; 136:7265-8. [PMID: 24796374 DOI: 10.1021/ja5032584] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We demonstrate herein that bifacial peptide nucleic acid (bPNA) hybrid triplexes functionally substitute for duplex DNA or RNA. Structure-function loss in three non-coding nucleic acids was inflicted by replacement of a duplex stem with unstructured oligo-T/U strands, which are bPNA binding sites. Functional rescue was observed on refolding of the oligo-T/U strands into bPNA triplex hybrid stems. Bifacial PNA binding was thus used to allosterically switch-on protein and small-molecule binding in DNA and RNA aptamers, as well as catalytic bond scission in a ribozyme. Duplex stems that support the catalytic site of a minimal type I hammerhead ribozyme were replaced with oligo-U loops, severely crippling or ablating the native RNA splicing function. Refolding of the U-loops into bPNA triplex stems completely restored splicing function in the hybrid system. These studies indicate that bPNA may have general utility as an allosteric trigger for a wide range of functions in non-coding nucleic acids.
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Affiliation(s)
- Xin Xia
- Department of Chemistry and Biochemistry, The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
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34
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Kohli AG, Kierstead PH, Venditto VJ, Walsh CL, Szoka FC. Designer lipids for drug delivery: from heads to tails. J Control Release 2014; 190:274-87. [PMID: 24816069 DOI: 10.1016/j.jconrel.2014.04.047] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 04/16/2014] [Accepted: 04/25/2014] [Indexed: 12/30/2022]
Abstract
For four decades, liposomes composed of both naturally occurring and synthetic lipids have been investigated as delivery vehicles for low molecular weight and macromolecular drugs. These studies paved the way for the clinical and commercial success of a number of liposomal drugs, each of which required a tailored formulation; one liposome size does not fit all drugs! Instead, the physicochemical properties of the liposome must be matched to the pharmacology of the drug. An extensive biophysical literature demonstrates that varying lipid composition can influence the size, membrane stability, in vivo interactions, and drug release properties of a liposome. In this review we focus on recently described synthetic lipid headgroups, linkers and hydrophobic domains that can provide control over the intermolecular forces, phase preference, and macroscopic behavior of liposomes. These synthetic lipids further our understanding of lipid biophysics, promote targeted drug delivery and improve liposome stability. We further highlight the immune reactivity of novel synthetic headgroups as a key design consideration. For instance it was originally thought that synthetic PEGylated lipids were immunologically inert; however, it's been observed that under certain conditions PEGylated lipids induce humoral immunity. Such immune activation may be a limitation to the use of other engineered lipid headgroups for drug delivery. In addition to the potential immunogenicity of engineered lipids, future investigations on liposome drugs in vivo should pay particular attention to the location and dynamics of payload release.
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Affiliation(s)
- Aditya G Kohli
- The UC-Berkeley-UCSF Graduate Program in Bioengineering, University of California Berkeley, Berkeley 94720, USA; Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA
| | - Paul H Kierstead
- Department of Chemistry, University of California, Berkeley 94720, USA
| | - Vincent J Venditto
- Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA
| | - Colin L Walsh
- The UC-Berkeley-UCSF Graduate Program in Bioengineering, University of California Berkeley, Berkeley 94720, USA; Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA
| | - Francis C Szoka
- The UC-Berkeley-UCSF Graduate Program in Bioengineering, University of California Berkeley, Berkeley 94720, USA; Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA.
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35
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Chmielewski MJ, Buhler E, Candau J, Lehn JM. Multivalency by Self-Assembly: Binding of Concanavalin A to Metallosupramolecular Architectures Decorated with Multiple Carbohydrate Groups. Chemistry 2014; 20:6960-77. [DOI: 10.1002/chem.201304511] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Indexed: 12/17/2022]
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36
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Samanta A, Ravoo BJ. Metal Ion, Light, and Redox Responsive Interaction of Vesicles by a Supramolecular Switch. Chemistry 2014; 20:4966-73. [DOI: 10.1002/chem.201304658] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 01/30/2014] [Indexed: 11/09/2022]
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37
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Xia X, Piao X, Bong D. Bifacial PNA complexation inhibits enzymatic access to DNA and RNA. Chembiochem 2014; 15:31-6. [PMID: 24259287 PMCID: PMC3896088 DOI: 10.1002/cbic.201300536] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Indexed: 02/02/2023]
Abstract
FULL STOP: Herein we report the effective in vitro inhibition of transcription, reverse-transcription and exonuclease function by formation of synthetic bPNA-nucleic acid triplex structures. Selective bPNA targeting of both DNA and RNA substrates suggests possible application of bPNAs as synthetic regulators of nucleic acid function.
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Affiliation(s)
- Xin Xia
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18 Avenue, Columbus, OH 43210 (USA)
| | - Xijun Piao
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18 Avenue, Columbus, OH 43210 (USA)
| | - Dennis Bong
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18 Avenue, Columbus, OH 43210 (USA)
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38
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Jin H, Zhou Y, Huang W, Zheng Y, Zhu X, Yan D. Three-component vesicle aggregation driven by adhesion interactions between Au nanoparticles and polydopamine-coated nanotubes. Chem Commun (Camb) 2014; 50:6157-60. [DOI: 10.1039/c4cc00609g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Large-scale and robust vesicle aggregates were obtained through three-component molecular recognition among cell-sized polymer vesicles, carbon nanotubes and Au nanoparticles driven by adhesion interactions between Au and polydopamine.
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Affiliation(s)
- Haibao Jin
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
| | - Wei Huang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | - Yongli Zheng
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
| | - Deyue Yan
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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39
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Abstract
Lipid membrane fusion is a fundamental noncovalent transformation as well as a central process in biology. The complex and highly controlled biological machinery of fusion has been the subject of intense investigation. In contrast, fewer synthetic approaches that demonstrate selective membrane fusion have been developed. Artificial recapitulation of membrane fusion is an informative pursuit in that fundamental biophysical concepts of biomembrane merger may be generally tested in a controlled reductionist system. A key concept that has emerged from extensive studies on lipid biophysics and biological membrane fusion is that selective membrane fusion derives from the coupling of surface recognition with local membrane disruption, or strain. These observations from native systems have guided the development of de novo-designed biomimetic membrane fusion systems that have unequivocally established the generality of these concepts in noncovalent chemistry. In this Account, we discuss the function and limitations of the artificial membrane fusion systems that have been constructed to date and the insights gained from their study by our group and others. Overall, the synthetic systems are highly reductionist and chemically selective, though there remain aspects of membrane fusion that are not sufficiently understood to permit designed function. In particular, membrane fusion with efficient retention of vesicular contents within the membrane-bound compartments remains a challenge. We discuss examples in which lipid mixing and some degree of vesicle-contents mixing is achieved, but the determinants of aqueous-compartment mixing remain unclear and therefore are difficult to generally implement. The ability to fully design membrane fusogenic function requires a deeper understanding of the biophysical underpinnings of membrane fusion, which has not yet been achieved. Thus, it is critical that biological and synthetic studies continue to further elucidate this biologically important process. Examination of lipid membrane fusion from a synthetic perspective can also reveal the governing noncovalent principles that drive chemically determined release and controlled mixing within nanometer-scale compartments. These are processes that figure prominently in numerous biotechnological and chemical applications. A rough guide to the construction of a functional membrane fusion system may already be assembled from the existing studies: surface-directed membrane apposition may generally be elaborated into selective fusion by coupling to a membrane-disruptive element, as observed over a range of systems that include small-molecule, DNA, or peptide fusogens. Membrane disruption may take different forms, and we briefly describe our investigation of the sequence determinants of fusion and lysis in membrane-active viral fusion peptide variants. These findings set the stage for further investigation of the critical elements that enable efficient, fully functional fusion of both membrane and aqueous compartments and the application of these principles to unite synthetic and biological membranes in a directed fashion. Controlled fusion of artificial and living membranes remains a chemical challenge that is biomimetic of native chemical transport and has a direct impact on drug delivery approaches.
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Affiliation(s)
- Mingming Ma
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Dennis Bong
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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40
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Lee SM, Nguyen ST. Smart Nanoscale Drug Delivery Platforms from Stimuli-Responsive Polymers and Liposomes. Macromolecules 2013; 46:9169-9180. [PMID: 28804160 PMCID: PMC5552073 DOI: 10.1021/ma401529w] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Since the 1960's, stimuli-responsive polymers have been utilized as functional soft materials for biological applications such as the triggered-release delivery of biologically active cargos. Over the same period, liposomes have been explored as an alternative drug delivery system with potentials to decrease the toxic side effects often associated with conventional small-molecule drugs. However, the lack of drug-release triggers and the instability of bare liposomes often limit their practical applications, causing short circulation time and low therapeutic efficacy. This perspective article highlights recent work in integrating these two materials together to achieve a targetable, triggerable nanoscale platform that fulfills all the characteristics of a near-ideal drug delivery system. Through a drop-in, post-synthesis modification strategy, a network of stimuli-responsive polymers can be integrated onto the surface of liposomes to form polymer-caged nanobins, a multifunctional nanoscale delivery platform that allows for multi-drug loading, targeted delivery, triggered drug-release, and theranostic capabilities.
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Affiliation(s)
- Sang-Min Lee
- Department of Chemistry and Center of Cancer Nanotechnology Excellence, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
- Department of Chemistry, The Catholic University of Korea, Bucheon, Gyeonggi-do 420-743 Korea
| | - SonBinh T. Nguyen
- Department of Chemistry and Center of Cancer Nanotechnology Excellence, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
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41
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Piao X, Xia X, Bong D. Bifacial peptide nucleic acid directs cooperative folding and assembly of binary, ternary, and quaternary DNA complexes. Biochemistry 2013; 52:6313-23. [PMID: 23964711 DOI: 10.1021/bi4008963] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report herein the structuring of single-stranded thymine-rich DNA sequences into peptide-DNA hairpin triplex structures via designed melamine-thymine nucleobase recognition. Melamine-displaying α-peptides were synthesized with the general form (EM*)n, where M* denotes a lysine residue side chain derivatized with melamine, a bifacial hydrogen bond complement for thymine. We have found that (EM*)n peptides, which we term bifacial peptide nucleic acid (bPNA), function as a noncovalent template for thymine-rich DNA tracts. Unstructured DNA of the general form dTnCmTn are bound to (EM*)n peptides and fold into cooperatively melting 1:1 bPNA-DNA hairpin complexes with dissociation constants in the submicromolar to low nanomolar range for n = 4-10. As the length of the interface (n) is decreased, the melting temperature of the bPNA-DNA complex drops significantly, though Kd increases are less substantial, suggestive of strong enthalpy-entropy compensation. This is borne out by differential scanning calorimetry analysis, which indicates enthalpically driven bPNA-DNA base-stacking that becomes markedly less exothermic as the recognition surface n decreases in size. The recognition interface tolerates a high number of "mismatches" and indicates half-site, or monofacial, recognition between melamine and thymine may occur if only 1 complementary nucleobase is available. Association correlates directly with fractional thymine content, with optimal binding when the number of T-T sites match the number of melamine units. Interestingly, when a DNA host has more T-T sites than melamine sites on bPNA, two or three bPNAs can bind to a single DNA, resulting in ternary and quaternary complexes that have higher thermal stability than the binary (1:1) bPNA-DNA complex, suggestive of cooperative multisite binding. In contrast, when two bPNAs of different lengths bind to the same DNA host, a ternary complex is formed with two melting transitions, corresponding to independent melting of each bPNA component from the complex. These data demonstrate that melamine-displaying bPNA recognize thymine-rich DNA in predictable and multifaceted ways that allow binding affinity, structure stability, and stoichiometry to be tuned through simple bPNA length modification and matching with DNA length. Synthetic bPNA structuring elements may be useful tools for biotechnology.
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Affiliation(s)
- Xijun Piao
- Department of Chemistry and Biochemistry, The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States
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42
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Bao C, Pähler G, Geil B, Janshoff A. Optical Fusion Assay Based on Membrane-Coated Spheres in a 2D Assembly. J Am Chem Soc 2013; 135:12176-9. [DOI: 10.1021/ja404071z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chunxiao Bao
- Institute of Physical Chemistry, Georg-August-University, Tammannstrasse 6, 37077 Göttingen,
Germany
| | - Gesa Pähler
- Institute of Physical Chemistry, Georg-August-University, Tammannstrasse 6, 37077 Göttingen,
Germany
| | - Burkhard Geil
- Institute of Physical Chemistry, Georg-August-University, Tammannstrasse 6, 37077 Göttingen,
Germany
| | - Andreas Janshoff
- Institute of Physical Chemistry, Georg-August-University, Tammannstrasse 6, 37077 Göttingen,
Germany
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43
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Vagenende V, Ching TJ, Chua RJ, Thirumoorthi N, Gagnon P. Amide-mediated hydrogen bonding at organic crystal/water interfaces enables selective endotoxin binding with picomolar affinity. ACS APPLIED MATERIALS & INTERFACES 2013; 5:4472-4478. [PMID: 23611466 DOI: 10.1021/am401018q] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Since the discovery of endotoxins as the primary toxic component of Gram-negative bacteria, researchers have pursued the quest for molecules that detect, neutralize, and remove endotoxins. Selective removal of endotoxins is particularly challenging for protein solutions and, to this day, no general method is available. Here, we report that crystals of the purine-derived compound allantoin selectively adsorb endotoxins with picomolar affinity through amide-mediated hydrogen bonding in aqueous solutions. Atom force microscopy and chemical inhibition experiments indicate that endotoxin adsorption is largely independent from hydrophobic and ionic interactions with allantoin crystals and is mediated by hydrogen bonding with amide groups at flat crystal surfaces. The small size (500 nm) and large specific surface area of allantoin crystals results in a very high endotoxin-binding capacity (3 × 10(7) EU/g) which compares favorably with known endotoxin-binding materials. These results provide a proof-of-concept for hydrogen bond-based molecular recognition processes in aqueous solutions and establish a practical method for removing endotoxins from protein solutions.
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Affiliation(s)
- Vincent Vagenende
- Bioprocessing Technology Institute, A*STAR (Agency for Science, Technology and Research), 20 Biopolis Way #06-01 Centros, Singapore.
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44
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Robson Marsden H, Korobko AV, Zheng T, Voskuhl J, Kros A. Controlled liposome fusion mediated by SNARE protein mimics. Biomater Sci 2013; 1:1046-1054. [DOI: 10.1039/c3bm60040h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Devi M, Dhir A, Pradeep CP. Au microparticles mediated construction of a logic based dual channel molecular keypad lock. Dalton Trans 2013; 42:7514-8. [DOI: 10.1039/c3dt50495f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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47
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Li J, Jiang H, Hu W, Xia H, Zou G, Zhang Q. Photo-controlled Hierarchical Assembly and Fusion of Coumarin-containing Polydiacetylene Vesicles. Macromol Rapid Commun 2012; 34:274-9. [DOI: 10.1002/marc.201200620] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 10/19/2012] [Indexed: 11/10/2022]
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48
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Sakaino H, Sawayama J, Kabashima SI, Yoshikawa I, Araki K. Dry Micromanipulation of Supramolecular Giant Vesicles on a Silicon Substrate: Highly Stable Hydrogen-Bond-Directed Nanosheet Membrane. J Am Chem Soc 2012; 134:15684-7. [DOI: 10.1021/ja307231u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hirotoshi Sakaino
- Institute
of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo
153-8505, Japan
| | - Jun Sawayama
- Institute
of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo
153-8505, Japan
| | - Shin-ichiro Kabashima
- Institute
of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo
153-8505, Japan
- Functional
Materials Research
Laboratories, Lion Corporation, 7-2-1 Hirai,
Edogawa-ku, Tokyo 132-0035, Japan
| | - Isao Yoshikawa
- Institute
of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo
153-8505, Japan
| | - Koji Araki
- Institute
of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo
153-8505, Japan
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49
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Li X, Zhao Y. Tunable Fusion and Aggregation of Liposomes Triggered by Multifunctional Surface-Cross-Linked Micelles. Bioconjug Chem 2012; 23:1721-5. [DOI: 10.1021/bc300082b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xueshu Li
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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50
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Goto H, Sudoh M, Kawamoto K, Sugimoto H, Inoue S. Isocyanurates with Planar Chirality: Design, Optical Resolution, and Isomerization. Chirality 2012; 24:867-78. [DOI: 10.1002/chir.22093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 06/06/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Hidetoshi Goto
- Department of Industrial Chemistry, Faculty of Engineering; Tokyo University of Science; Tokyo Japan
| | - Masanao Sudoh
- Department of Industrial Chemistry, Faculty of Engineering; Tokyo University of Science; Tokyo Japan
| | - Keiko Kawamoto
- Department of Industrial Chemistry, Faculty of Engineering; Tokyo University of Science; Tokyo Japan
| | - Hiroshi Sugimoto
- Department of Industrial Chemistry, Faculty of Engineering; Tokyo University of Science; Tokyo Japan
| | - Shohei Inoue
- Department of Industrial Chemistry, Faculty of Engineering; Tokyo University of Science; Tokyo Japan
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