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Krabicová I, Dolenský B, Řezanka M. Selectivity of 1- O-Propargyl-d-Mannose Preparations. Molecules 2022; 27:1483. [PMID: 35268584 PMCID: PMC8911549 DOI: 10.3390/molecules27051483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/15/2022] [Accepted: 02/18/2022] [Indexed: 11/16/2022] Open
Abstract
Thanks to their ability to bind to specific biological receptors, mannosylated structures are examined in biomedical applications. One of the most common ways of linking a functional moiety to a structure is to use an azide-alkyne click reaction. Therefore, it is necessary to prepare and isolate a propargylated mannose derivative of high purity to maintain its bioactivity. Three known preparations of propargyl-α-mannopyranoside were revisited, and products were analysed by NMR spectroscopy. The preparations were shown to yield by-products that have not been described in the literature yet. Our experiments showed that one-step procedures could not provide pure propargyl-α-mannopyranoside, while a three-step procedure yielded the desired compound of high purity.
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Affiliation(s)
- Ilona Krabicová
- Department of Chemistry, Faculty of Science, Humanities and Education, Technical University of Liberec, Studentská 1402/2, 46117 Liberec, Czech Republic;
| | - Bohumil Dolenský
- Department of Analytical Chemistry, Faculty of Chemical Engineering, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic;
| | - Michal Řezanka
- Department of Nanochemistry, Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 46117 Liberec, Czech Republic
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2
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Machtakova M, Wirsching S, Gehring S, Landfester K, Thérien-Aubin H. Controlling the semi-permeability of protein nanocapsules influences the cellular response to macromolecular payloads. J Mater Chem B 2021; 9:8389-8398. [PMID: 34676863 DOI: 10.1039/d1tb01368h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Nanocapsules are an excellent platform for the delivery of macromolecular payloads such as proteins, nucleic acids or polyprodrugs, since they can both protect the sensitive cargo and target its delivery to the desired site of action. However, the release of macromolecules from nanocapsules remains a challenge due to their restricted diffusion through the nanoshell compared to small molecule cargo. Here, we designed degradable protein nanocapsules with varying crosslinking densities of the nanoshell to control the release of model macromolecules. While the crosslinking did not influence the degradability of the capsules by natural proteases, it significantly affected the release profiles. Furthermore, the optimized protein nanocapsules were successfully used to deliver and effectively release a bioactive macromolecular vaccine adjuvant in vitro and, thus, can be used as an efficient platform for the design of potential nanovaccines.
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Affiliation(s)
| | - Sebastian Wirsching
- Children's Hospital, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Stephan Gehring
- Children's Hospital, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | | | - Héloïse Thérien-Aubin
- Max Planck Institute for Polymer Research, Mainz, Germany. .,Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, Canada.
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Multivalency Beats Complexity: A Study on the Cell Uptake of Carbohydrate Functionalized Nanocarriers to Dendritic Cells. Cells 2020; 9:cells9092087. [PMID: 32932639 PMCID: PMC7564404 DOI: 10.3390/cells9092087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/01/2020] [Accepted: 09/09/2020] [Indexed: 11/17/2022] Open
Abstract
Herein, we report the synthesis of carbohydrate and glycodendron structures for dendritic cell targeting, which were subsequently bound to hydroxyethyl starch (HES) nanocapsules prepared by the inverse miniemulsion technique. The uptake of the carbohydrate-functionalized HES nanocapsules into immature human dendritic cells (hDCs) revealed a strong dependence on the used carbohydrate. A multivalent mannose-terminated dendron was found to be far superior in uptake compared to the structurally more complex oligosaccharides used.
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Kammer LM, Krumb M, Spitzbarth B, Lipp B, Kühlborn J, Busold J, Mulina OM, Terentev AO, Opatz T. Photoredox-Catalyzed Four-Component Reaction for the Synthesis of Complex Secondary Amines. Org Lett 2020; 22:3318-3322. [DOI: 10.1021/acs.orglett.0c00614] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lisa Marie Kammer
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Matthias Krumb
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Benjamin Spitzbarth
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Benjamin Lipp
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Jonas Kühlborn
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Jonas Busold
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Olga M. Mulina
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991 Moscow, Russia
| | - Alexander O. Terentev
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991 Moscow, Russia
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
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Wagener K, Bros M, Krumb M, Langhanki J, Pektor S, Worm M, Schinnerer M, Montermann E, Miederer M, Frey H, Opatz T, Rösch F. Targeting of Immune Cells with Trimannosylated Liposomes. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.201900185] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Karolin Wagener
- Institute of Nuclear Chemistry Johannes Gutenberg University Fritz‐Strassmann‐Weg 2 Mainz 55128 Germany
| | - Matthias Bros
- Department of DermatologyUniversity Medical Center Langenbeckstraße 1 Mainz 55101 Germany
| | - Matthias Krumb
- Department of ChemistryJohannes Gutenberg University Duesbergweg 10–14 Mainz 55128 Germany
| | - Jens Langhanki
- Department of ChemistryJohannes Gutenberg University Duesbergweg 10–14 Mainz 55128 Germany
| | - Stefanie Pektor
- Clinic and Polyclinic of Nuclear MedicineUniversity Medical Center Langenbeckstraße 1 Mainz 55101 Germany
| | - Matthias Worm
- Department of ChemistryJohannes Gutenberg University Duesbergweg 10–14 Mainz 55128 Germany
| | - Meike Schinnerer
- Department of ChemistryJohannes Gutenberg University Duesbergweg 10–14 Mainz 55128 Germany
- Institute of Physical ChemistryJohannes Gutenberg University Jakob‐Welder‐Weg 11 Mainz 55128 Germany
| | - Evelyn Montermann
- Department of DermatologyUniversity Medical Center Langenbeckstraße 1 Mainz 55101 Germany
| | - Matthias Miederer
- Clinic and Polyclinic of Nuclear MedicineUniversity Medical Center Langenbeckstraße 1 Mainz 55101 Germany
| | - Holger Frey
- Department of ChemistryJohannes Gutenberg University Duesbergweg 10–14 Mainz 55128 Germany
| | - Till Opatz
- Department of ChemistryJohannes Gutenberg University Duesbergweg 10–14 Mainz 55128 Germany
| | - Frank Rösch
- Institute of Nuclear Chemistry Johannes Gutenberg University Fritz‐Strassmann‐Weg 2 Mainz 55128 Germany
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6
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González Plaza JJ. Small RNAs in cell-to-cell communications during bacterial infection. FEMS Microbiol Lett 2019; 365:4830097. [PMID: 29390095 DOI: 10.1093/femsle/fny024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 01/25/2018] [Indexed: 01/18/2023] Open
Abstract
Intercellular communication is a widespread phenomenon in all domains of life. Bacteria have developed many ways of communicating with one another and with other species, either prokaryotic or eukaryotic. RNA has been a key molecule since the beginning of life on Earth, and is one of the carriers of information. Given the current antibiotic crisis, understanding the way in which pathogens communicate can lead towards improved ways to control infections when antimicrobial therapy is not possible. Different subspecies of RNA, non-coding, and of small size, designated here as ncRNAs, have been in recent years the subject of a great research effort, and results have contributed to a growing field of knowledge. This review focuses on four different aspects of ncRNA involvement in cell-to-cell communications during bacterial infections: pathogen recognition by the host, alteration of host microRNA profiles, production of domestic and secreted forms of ncRNAs and subversion of the host responses. The current review article focuses on the most recent discoveries in the field and gives an integrative idea based on the discussed studies.
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Affiliation(s)
- Juan José González Plaza
- Research Department, University Hospital for Infectious Diseases "Dr. Fran Mihaljevic", Zagreb, Croatia
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Keller P, Freund I, Marchand V, Bec G, Huang R, Motorin Y, Eigenbrod T, Dalpke A, Helm M. Double methylation of tRNA-U54 to 2'-O-methylthymidine (Tm) synergistically decreases immune response by Toll-like receptor 7. Nucleic Acids Res 2019; 46:9764-9775. [PMID: 30102387 PMCID: PMC6182150 DOI: 10.1093/nar/gky644] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 08/02/2018] [Indexed: 12/25/2022] Open
Abstract
Sensing of nucleic acids for molecular discrimination between self and non-self is a challenging task for the innate immune system. RNA acts as a potent stimulus for pattern recognition receptors including in particular human Toll-like receptor 7 (TLR7). Certain RNA modifications limit potentially harmful self-recognition of endogenous RNA. Previous studies had identified the 2′-O-methylation of guanosine 18 (Gm18) within tRNAs as an antagonist of TLR7 leading to an impaired immune response. However, human tRNALys3 was non-stimulatory despite lacking Gm18. To identify the underlying molecular principle, interferon responses of human peripheral blood mononuclear cells to differentially modified tRNALys3 were determined. The investigation of synthetic modivariants allowed attributing a significant part of the immunosilencing effect to the 2′-O-methylthymidine (m5Um) modification at position 54. The effect was contingent upon the synergistic presence of both methyl groups at positions C5 and 2’O, as shown by the fact that neither Um54 nor m5U54 produced any effect alone. Testing permutations of the nucleobase at ribose-methylated position 54 suggested that the extent of silencing and antagonism of the TLR7 response was governed by hydrogen patterns and lipophilic interactions of the nucleobase. The results identify a new immune-modulatory endogenous RNA modification that limits TLR7 activation by RNA.
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Affiliation(s)
- Patrick Keller
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University of Mainz, Staudingerweg 5, D-55128 Mainz, Germany
| | - Isabel Freund
- Department of Infectious Diseases, Medical Microbiology and Hygiene, Heidelberg University Hospital, 69120 Heidelberg, Germany
| | - Virginie Marchand
- Next Generation Sequencing Platform, UMS2008 Ingénierie Biologie Santé en Lorraine (IBSLor), BioPôle de l'Université de Lorraine Campus Biologie-Santé, 9, avenue de la Forêt de Haye, CS 50184, 54505 Vandoeuvre-les-Nancy, France
| | - Guillaume Bec
- Biophysics and Structural Biology Team, Unité Architecture et réactivité de l'ARN (UPR9002), Institut de Biologie Moléculaire et Cellulaire du CNRS, Université de Strasbourg, 15, rue René Descartes, F67084, Strasbourg cedex, France
| | - Raven Huang
- Department of Biochemistry, Center for Biophysics & Computational Biology, University of Illinois at Urbana-Champaign, 411 Roger Adams Lab., 600 S. Mathews Ave. Urbana, IL 61801, USA
| | - Yuri Motorin
- Laboratoire Ingénierie Moléculaire et Physiopathologie Articulaire (IMoPA) UMR7365 CNRS-UL, BioPôle de l'Université de Lorraine Campus Biologie-Santé, 9, avenue de la Forêt de Haye, CS 50184, 54505 Vandoeuvre-les-Nancy, France
| | - Tatjana Eigenbrod
- Department of Infectious Diseases, Medical Microbiology and Hygiene, Heidelberg University Hospital, 69120 Heidelberg, Germany
| | - Alexander Dalpke
- Department of Infectious Diseases, Medical Microbiology and Hygiene, Heidelberg University Hospital, 69120 Heidelberg, Germany
| | - Mark Helm
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg-University of Mainz, Staudingerweg 5, D-55128 Mainz, Germany
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RNA Modifications Modulate Activation of Innate Toll-Like Receptors. Genes (Basel) 2019; 10:genes10020092. [PMID: 30699960 PMCID: PMC6410116 DOI: 10.3390/genes10020092] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 01/23/2019] [Accepted: 01/25/2019] [Indexed: 12/13/2022] Open
Abstract
Self/foreign discrimination by the innate immune system depends on receptors that identify molecular patterns as associated to pathogens. Among others, this group includes endosomal Toll-like receptors, among which Toll-like receptors (TLR) 3, 7, 8, and 13 recognize and discriminate mammalian from microbial, potentially pathogen-associated, RNA. One of the discriminatory principles is the recognition of endogenous RNA modifications. Previous work has identified a couple of RNA modifications that impede activation of TLR signaling when incorporated in synthetic RNA molecules. Of note, work that is more recent has now shown that RNA modifications in their naturally occurring context can have immune-modulatory functions: Gm, a naturally occurring ribose-methylation within tRNA resulted in a lack of TLR7 stimulation and within a defined sequence context acted as antagonist. Additional RNA modifications with immune-modulatory functions have now been identified and recent work also indicates that RNA modifications within the context of whole prokaryotic or eukaryotic cells are indeed used for immune-modulation. This review will discuss new findings and developments in the field of immune-modulatory RNA modifications.
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