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Tong Q, Schmidt MS, Wittmann V, Mecking S. Multivalent Carbohydrate-Functionalized Polymer Nanocrystals. Biomacromolecules 2019; 20:294-304. [PMID: 30512919 DOI: 10.1021/acs.biomac.8b01460] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nanoparticles with a covalently bound shell of carbohydrate or sulfate groups, respectively, and a polyethylene core were generated by Ni(II)-catalyzed aqueous copolymerization of ethylene with comonomers undec-10-en-1-yl sulfate, undec-10-en-1-yl β-d-glucoside or undec-10-en-1-yl α-d-mannoside, respectively. Via remote substituents of the catalyst, the degree of branching and consequently degree of crystallinity of the polyethylene core of the glyconanoparticles could be controlled. This in turn impacts particle shapes, from spherical to anisotropic platelets, as observed by cryo-transmission electron microscopy. Enzyme-linked lectin assays revealed the mannose-decorated nanocrystals to be efficient multivalent ligands for concavalin A.
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Affiliation(s)
- Qiong Tong
- Department of Chemistry , University of Konstanz , Universitätsstraße 10 , D-78457 Konstanz , Germany
| | - Magnus S Schmidt
- Department of Chemistry , University of Konstanz , Universitätsstraße 10 , D-78457 Konstanz , Germany
| | - Valentin Wittmann
- Department of Chemistry , University of Konstanz , Universitätsstraße 10 , D-78457 Konstanz , Germany
| | - Stefan Mecking
- Department of Chemistry , University of Konstanz , Universitätsstraße 10 , D-78457 Konstanz , Germany
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2
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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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Daudey G, Zope HR, Voskuhl J, Kros A, Boyle AL. Membrane-Fusogen Distance Is Critical for Efficient Coiled-Coil-Peptide-Mediated Liposome Fusion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12443-12452. [PMID: 28980816 PMCID: PMC5666511 DOI: 10.1021/acs.langmuir.7b02931] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 10/02/2017] [Indexed: 06/07/2023]
Abstract
We have developed a model system for membrane fusion that utilizes lipidated derivatives of a heterodimeric coiled-coil pair dubbed E3 (EIAALEK)3 and K3 (KIAALKE)3. In this system, peptides are conjugated to a lipid anchor via a poly(ethylene glycol) (PEG) spacer, and this contribution studies the influence of the PEG spacer length, coupled with the type of lipid anchor, on liposome-liposome fusion. The effects of these modifications on peptide secondary structure, their interactions with liposomes, and their ability to mediate fusion were studied using a variety of different content mixing experiments and CD spectroscopy. Our results demonstrate the asymmetric role of the peptides in the fusion process because alterations to the PEG spacer length affect E3 and K3 differently. We conclude that negatively charged E3 acts as a "handle" for positively charged K3 and facilitates liposome docking, the first stage of the fusion process, through coiled-coil formation. The efficacy of this E3 handle is enhanced by longer spacer lengths. K3 directs the fusion process via peptide-membrane interactions, but the length of the PEG spacer plays two competing roles: a PEG4/PEG8 spacer length is optimal for membrane destabilization; however, a PEG12 spacer increases the fusion efficiency over time by improving the peptide accessibility for successive fusion events. Both the anchor type and spacer length affect the peptide structure; a cholesterol anchor appears to enhance K3-membrane interactions and thus mediates fusion more efficiently.
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Affiliation(s)
- Geert
A. Daudey
- Supramolecular and Biomaterials Chemistry, Leiden
Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | | | | | - Alexander Kros
- Supramolecular and Biomaterials Chemistry, Leiden
Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Aimee L. Boyle
- Supramolecular and Biomaterials Chemistry, Leiden
Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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Francis DV, Harper JB, Gioia S, Lamb RN, Read RW. Defining surface properties of fluorous bis(1H-1,2,3-triazol-4-ylmethyl) ethers. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.01.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Choi UH, Mittal A, Price TL, Colby RH, Gibson HW. Imidazolium-Based Ionic Liquids as Initiators in Ring Opening Polymerization: Ionic Conduction and Dielectric Response of End-Functional Polycaprolactones and Their Block Copolymers. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201500424] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- U Hyeok Choi
- Department of Materials Science and Engineering; Pennsylvania State University; University Park PA 16802 USA
- Functional Composites Department; Korea Institute of Materials Science; Changwon 642-831 Korea
| | - Anuj Mittal
- Department of Chemistry; Macromolecules and Interfaces Institute; Virginia Tech; Blacksburg VA 24061 USA
- Momentive Performance Materials Pvt. Ltd.; Bangalore Karnataka 560100 India
| | - Terry L. Price
- Department of Chemistry; Macromolecules and Interfaces Institute; Virginia Tech; Blacksburg VA 24061 USA
| | - Ralph H. Colby
- Department of Materials Science and Engineering; Pennsylvania State University; University Park PA 16802 USA
| | - Harry W. Gibson
- Department of Chemistry; Macromolecules and Interfaces Institute; Virginia Tech; Blacksburg VA 24061 USA
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Janett E, Bernardinelli Y, Müller D, Bochet CG. Synthesis of FMRFaNV, a Photoreleasable Caged Transmitter Designed to Study Neuron-Glia Interactions in the Central Nervous System. Bioconjug Chem 2015; 26:2408-18. [PMID: 26511675 DOI: 10.1021/acs.bioconjchem.5b00473] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Neuroscience studies require technologies able to deliver compounds with both scale and timing compatibility with morphological and physiological synaptic properties. In this light, two-photon flash photolysis has been extensively used to successfully apply glutamate or other neurotransmitters at the synaptic level. However, the set of commercially available caged compounds is restricted and incompatible with studies demanding high cell specificity. The gain in cell specificity is especially relevant and challenging when studying neuron-glia interactions in the central nervous system. Here we develop a system to mimic the metabotropic glutamate receptor-dependent response of astrocytes, a glial cell type, following synaptic glutamate release. For this, we expressed an exogeneous orphan Gq-coupled protein of the Mas-related-gene (Mrg) family in glial cells and generated an MrgR's agonist peptide (FMRFa) that was chemically caged with a nitroveratryl photolabile protecting group (NV). NV has an appropriate quantum yield and a high absorption maximum that makes it very adapted to experiments with very short irradiation time. This novel caged compound allowed the activation of MrgR with both single- and two-photon light sources. Indeed, MrgR activation induced calcium transients and morphological changes in astrocytes as described previously. Thus, FMRFaNV is a very promising tool to study neuron-glia interactions.
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Affiliation(s)
- Elia Janett
- Department of Chemistry, University of Fribourg , Chemin du Musée 9, CH-1700 Fribourg, Switzerland
| | - Yann Bernardinelli
- Department of Basic Neurosciences, School of Medicine, University of Geneva , rue Michel-Servet 1, CH-1211 Geneva 4, Switzerland
| | - Dominique Müller
- Department of Basic Neurosciences, School of Medicine, University of Geneva , rue Michel-Servet 1, CH-1211 Geneva 4, Switzerland
| | - Christian G Bochet
- Department of Chemistry, University of Fribourg , Chemin du Musée 9, CH-1700 Fribourg, Switzerland
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Csávás M, Demeter T, Herczeg M, Timári I, Kövér KE, Herczegh P, Borbás A. Rapid synthesis of self-assembling 1,2-thiomannobioside glycoconjugates as potential multivalent ligands of mannose-binding lectins. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Pan H, Grow ME, Wilson O, Daniel MC. A new poly(propylene imine) dendron as potential convenient building-block in the construction of multifunctional systems. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Chromiński M, Proinsias KÓ, Martin E, Gryko D. Protoporphyrin IX/Cobyrinate Derived Hybrids - Novel Activators of Soluble Guanylyl Cyclase. European J Org Chem 2013; 2013:1530-1537. [PMID: 23519483 PMCID: PMC3600653 DOI: 10.1002/ejoc.201201303] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Indexed: 11/10/2022]
Abstract
A new cobyrinate/protoporphyrin IX molecular hybrids were prepared via CuAAC reaction. The synthesis involved selective preparation of cobyrinate and PpIX derived building blocks possessing respectively terminal alkyne and azide moieties followed by the CuOAc catalyzed cycloaddition reaction. Synthesized molecules activated soluble guanylyl cyclase showing strong linker length/activation dependence.
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Affiliation(s)
- Mikołaj Chromiński
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Keith ó Proinsias
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Emil Martin
- Department of Internal Medicine, Division of Cardiology, University of Texas Health Science Center in Houston, 1941 East Road, The University of Texas, Houston, Texas USA, 77054
| | - Dorota Gryko
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Tollas S, Bereczki I, Sipos A, Rőth E, Batta G, Daróczi L, Kéki S, Ostorházi E, Rozgonyi F, Herczegh P. Nano-sized clusters of a teicoplanin ψ-aglycon-fullerene conjugate. Synthesis, antibacterial activity and aggregation studies. Eur J Med Chem 2012; 54:943-8. [DOI: 10.1016/j.ejmech.2012.06.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 06/15/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
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Brodersen N, Arbuzova A, Herrmann A, Egger H, Liebscher J. Synthesis of novel amphiphilic conjugates with a biological recognition function for developing targeted triggered liposomal delivery systems. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.07.089] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Goldenbogen B, Brodersen N, Gramatica A, Loew M, Liebscher J, Herrmann A, Egger H, Budde B, Arbuzova A. Reduction-sensitive liposomes from a multifunctional lipid conjugate and natural phospholipids: reduction and release kinetics and cellular uptake. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10820-10829. [PMID: 21819046 DOI: 10.1021/la201160y] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The development of targeted and triggerable delivery systems is of high relevance for anticancer therapies. We report here on reduction-sensitive liposomes composed of a novel multifunctional lipidlike conjugate, containing a disulfide bond and a biotin moiety, and natural phospholipids. The incorporation of the disulfide conjugate into vesicles and the kinetics of their reduction were studied using dansyl-labeled conjugate 1 in using the dansyl fluorescence environmental sensitivity and the Förster resonance energy transfer from dansyl to rhodamine-labeled phospholipids. Cleavage of the disulfide bridge (e.g., by tris(2-carboxyethyl)phosphine (TCEP), dithiothreitol (DTT), l-cysteine, or glutathione (GSH)) removed the hydrophilic headgroup of the conjugate and thus changed the membrane organization leading to the release of entrapped molecules. Upon nonspecific uptake of vesicles by macrophages, calcein release from reduction-sensitive liposomes consisting of the disulfide conjugate and phospholipids was more efficient than from reduction-insensitive liposomes composed only of phospholipids. The binding of streptavidin to the conjugates did not interfere with either the subsequent reduction of the disulfide bond of the conjugate or the release of entrapped molecules. Breast cancer cell line BT-474, overexpressing the HER2 receptor, showed a high uptake of the reduction-sensitive doxorubicin-loaded liposomes functionalized with the biotin-tagged anti-HER2 antibody. The release of the entrapped cargo inside the cells was observed, implying the potential of using our system for active targeting and delivery.
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Affiliation(s)
- Björn Goldenbogen
- Institute of Biology/Molecular Biophysics, Humboldt-University Berlin, Invalidenstrasse 42, 10115 Berlin, Germany
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van Ameijde J, Poot AJ, van Wandelen LTM, Wammes AEM, Ruijtenbeek R, Rijkers DTS, Liskamp RMJ. Preparation of novel alkylated arginine derivatives suitable for click-cycloaddition chemistry and their incorporation into pseudosubstrate- and bisubstrate-based kinase inhibitors. Org Biomol Chem 2010; 8:1629-39. [PMID: 20237675 DOI: 10.1039/b922928k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient strategies for the introduction of arginine residues featuring acetylene or azide moieties in their side chains are described. The substituents are introduced in a way that maintains the basicity of the guanidine moiety. The methodology can be used e.g. for non-invasive labeling of arginine-containing peptides. Its applicability is demonstrated by the introduction of 'click' handles into a Protein Kinase C (PKC) pseudosubstrate peptide, and the subsequent preparation and evaluation of a novel bisubstrate-based inhibitor based on such a peptide.
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Affiliation(s)
- Jeroen van Ameijde
- Medicinal Chemistry and Chemical Biology, Faculty of Science, Utrecht University, Sorbonnelaan 16, 3584 CA Utrecht, The Netherlands
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Perera BGK, Maly DJ. Design, synthesis and characterization of “clickable” 4-anilinoquinazoline kinase inhibitors. MOLECULAR BIOSYSTEMS 2008; 4:542-50. [DOI: 10.1039/b720014e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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