1
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Mildner M, Hanio S, Endres S, Scheller L, Engel B, Castañar L, Meinel L, Pöppler AC. In situ setup for screening of drug permeation by NMR spectroscopy. Anal Methods 2024; 16:1468-1472. [PMID: 38226670 DOI: 10.1039/d3ay01995k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
There are various commercially available setups for studying drug permeation, which differ in cost and manual labor. We explore an artificial membrane in an NMR tube to assess drug permeation with automated measurements. NMR-based concentrations were validated with HPLC and compared to a conventional setup. Setup-specific challenges and workarounds as well as future setup-designs for this and other applications are discussed.
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Affiliation(s)
- Malte Mildner
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany.
| | - Simon Hanio
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Sebastian Endres
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany.
| | - Lena Scheller
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Bettina Engel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Laura Castañar
- Department of Organic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Madrid, Spain
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany.
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2
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Li C, Bhandary R, Marinow A, Bachmann S, Pöppler AC, Binder WH. Stability of Quadruple Hydrogen Bonds in an Ionic Liquid Environment. Macromol Rapid Commun 2024; 45:e2300464. [PMID: 37796474 DOI: 10.1002/marc.202300464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/02/2023] [Indexed: 10/06/2023]
Abstract
Hydrogen bonds (H-bonds) are highly sensitive to the surrounding environments owing to their dipolar nature, with polar solvents kown to significantly weaken H-bonds. Herein, the stability of the H-bonding motif ureidopyrimidinone (UPy) is investigated, embedded into a highly polar polymeric ionic liquid (PIL) consisting of pendant pyrrolidinium bis(trifluoromethylsulfonyl)imide (IL) moieties, to study the influence of such ionic environments on the UPy H-bonds. The content of the surrounding IL is changed by addition of an additional low molecular weight IL to further boost the IL content around the UPy moieties in molar ratios of UPy/IL ranging from 1/4 up to 1/113, thereby promoting the polar microenvironment around the UPy-H-bonds. Variable-temperature solid-state MAS NMR spectroscopy and FT-IR spectroscopy demonstrate that the UPy H-bonds are largely present as (UPy-) dimers, but sensitive to elevated temperatures (>70 °C). Subsequent rheology and DSC studies reveal that the ILs only solvate the polymeric chains but do not interfere with the UPy-dimer H-bonds, thus accounting for their high stability and applicability in many material systems.
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Affiliation(s)
- Chenming Li
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle (Saale), Germany
| | - Rajesh Bhandary
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle (Saale), Germany
| | - Anja Marinow
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle (Saale), Germany
| | - Stephanie Bachmann
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Wolfgang H Binder
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Science II (Chemistry, Physics and Mathematics), Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle (Saale), Germany
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3
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Hanio S, Möllmert S, Möckel C, Choudhury S, Höpfel AI, Zorn T, Endres S, Schlauersbach J, Scheller L, Keßler C, Scherf-Clavel O, Bellstedt P, Schubert US, Pöppler AC, Heinze KG, Guck J, Meinel L. Bile Is a Selective Elevator for Mucosal Mechanics and Transport. Mol Pharm 2023; 20:6151-6161. [PMID: 37906224 DOI: 10.1021/acs.molpharmaceut.3c00550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Mucus mechanically protects the intestinal epithelium and impacts the absorption of drugs, with a largely unknown role for bile. We explored the impacts of bile on mucosal biomechanics and drug transport within mucus. Bile diffused with square-root-of-time kinetics and interplayed with mucus, leading to transient stiffening captured in Brillouin images and a concentration-dependent change from subdiffusive to Brownian-like diffusion kinetics within the mucus demonstrated by differential dynamic microscopy. Bile-interacting drugs, Fluphenazine and Perphenazine, diffused faster through mucus in the presence of bile, while Metoprolol, a drug with no bile interaction, displayed consistent diffusion. Our findings were corroborated by rat studies, where co-dosing of a bile acid sequestrant substantially reduced the bioavailability of Perphenazine but not Metoprolol. We clustered over 50 drugs based on their interactions with bile and mucin. Drugs that interacted with bile also interacted with mucin but not vice versa. This study detailed the dynamics of mucus biomechanics under bile exposure and linked the ability of a drug to interact with bile to its abbility to interact with mucus.
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Affiliation(s)
- Simon Hanio
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Stephanie Möllmert
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Staudtstrasse 2, 91058 Erlangen, Germany
| | - Conrad Möckel
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Staudtstrasse 2, 91058 Erlangen, Germany
| | - Susobhan Choudhury
- Rudolf Virchow Center for Integrative and Translational Bioimaging, University of Würzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany
| | - Andreas I Höpfel
- Rudolf Virchow Center for Integrative and Translational Bioimaging, University of Würzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany
| | - Theresa Zorn
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Sebastian Endres
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Jonas Schlauersbach
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Lena Scheller
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Christoph Keßler
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Oliver Scherf-Clavel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Peter Bellstedt
- Institute of Organic Chemistry, University of Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Institute for Clinical Chemistry, University of Zürich,Rämistrasse 100, 8091 Zurich, Switzerland
| | - Ulrich S Schubert
- Institute of Organic Chemistry, University of Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), University of Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Katrin G Heinze
- Rudolf Virchow Center for Integrative and Translational Bioimaging, University of Würzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany
| | - Jochen Guck
- Max Planck Institute for the Science of Light and Max-Planck-Zentrum für Physik und Medizin, Staudtstrasse 2, 91058 Erlangen, Germany
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
- Helmholtz Institute for RNA-based Infection Research (HIRI), Josef-Schneider-Strasse 2, 97080 Wuerzburg, Germany
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4
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Endres S, Ehrmanntraut S, Endres L, Can K, Kraft C, Rasmussen T, Luxenhofer R, Böttcher B, Engels B, Pöppler AC. Structural Investigation on How Guest Loading of Poly(2-oxazoline)-Based Micelles Affects the Interaction with Simulated Intestinal Fluids. ACS Biomater Sci Eng 2023; 9:4821-4830. [PMID: 37441793 DOI: 10.1021/acsbiomaterials.3c00645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/15/2023]
Abstract
Drug loading of polymer micelles can have a profound effect on their particle size and morphology as well as their physicochemical properties. In turn, this influences performance in biological environments. For oral delivery of drugs, the intestinal environment is key, and consequently, a thorough structural understanding of what happens at this material-biology interface is required to understand in vivo performance and tailor improved delivery vehicles. In this study, we address this interface in vitro through a detailed structural characterization of the colloidal assemblies of polymeric micelles based on poly(2-oxazolines) with three different guest loadings with the natural product curcumin (17-52 wt %) in fed-state simulated intestinal fluids (FeSSIF). For this, we employ NMR spectroscopy, in particular, 1H NMR, 1H-1H-NOESY, and 1H DOSY experiments complemented by quantum chemical calculations and cryo-TEM measurements. Through this mixture of methods, we identified curcumin-taurocholate interactions as central interaction patterns alongside interactions with the polymer and lipids. Furthermore, curcumin molecules can be exchanged between polymer micelles and bile colloids, an important prerequisite for their uptake. Finally, increased loading of the polymer micelles with curcumin resulted in a larger number of vesicles as taurocholate─through coordination with Cur─is less available to form nanoparticles with the lipids. The loading-dependent behavior found in this study deviates from previous work on a different drug substance highlighting the need for further studies including different drug molecules and polymer types to improve the understanding of events on the molecular level.
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Affiliation(s)
- Sebastian Endres
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Silvia Ehrmanntraut
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Lukas Endres
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany
| | - Koray Can
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany
| | - Christian Kraft
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Würzburg, 97080 Würzburg, Germany
| | - Tim Rasmussen
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Würzburg, 97080 Würzburg, Germany
- Biocenter, University of Würzburg, 97074 Würzburg, Germany
| | - Robert Luxenhofer
- Soft Matter Chemistry, Department of Chemistry and Helsinki Institute of Sustainability Science, Faculty of Science, University of Helsinki, PB55, 00014 Helsinki, Finland
| | - Bettina Böttcher
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Würzburg, 97080 Würzburg, Germany
- Biocenter, University of Würzburg, 97074 Würzburg, Germany
| | - Bernd Engels
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
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5
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Schlauersbach J, Werthmüller D, Harlacher C, Galli B, Hanio S, Lenz B, Endres S, Pöppler AC, Scherf-Clavel O, Meinel L. Harnessing Bile for Drug Absorption through Rational Excipient Selection. Mol Pharm 2023; 20:3864-3875. [PMID: 37406305 DOI: 10.1021/acs.molpharmaceut.2c01009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Bile solubilization and apparent solubility at resorption sites critically affect the bioavailability of orally administered and poorly water-soluble drugs. Therefore, identification of drug-bile interaction may critically determine the overall formulation success. For the case of the drug candidate naporafenib, drug in solution at phase separation onset significantly improved with polyethylene glycol-40 hydrogenated castor oil (RH40) and amino methacrylate copolymer (Eudragit E) but not with hydroxypropyl cellulose (HPC) in both phosphate-buffered saline (PBS) and PBS supplemented with bile components. Naporafenib interacted with bile as determined by 1H and 2D 1H-1H nuclear magnetic resonance spectroscopy and so did Eudragit E and RH40 but not HPC. Flux across artificial membranes was reduced in the presence of Eudragit E. RH40 reduced the naporafenib supersaturation duration. HPC on the other side stabilized naporafenib's supersaturation and did not substantially impact flux. These insights on bile interaction correlated with pharmacokinetics (PK) in beagle dogs. HPC preserved naporafenib bile solubilization in contrast to Eudragit E and RH40, resulting in favorable PK.
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Affiliation(s)
- Jonas Schlauersbach
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | | | | | - Bruno Galli
- Novartis Pharma AG, Lichtstrasse 35, CH-4056 Basel, Switzerland
| | - Simon Hanio
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Bettina Lenz
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Sebastian Endres
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Oliver Scherf-Clavel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
- Helmholtz Institute for RNA-based Infection Biology (HIRI), Josef-Schneider-Strasse 2/D15, DE-97080 Wuerzburg, Germany
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6
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Hahn L, Zorn T, Kehrein J, Kielholz T, Ziegler AL, Forster S, Sochor B, Lisitsyna ES, Durandin NA, Laaksonen T, Aseyev V, Sotriffer C, Saalwächter K, Windbergs M, Pöppler AC, Luxenhofer R. Unraveling an Alternative Mechanism in Polymer Self-Assemblies: An Order-Order Transition with Unusual Molecular Interactions between Hydrophilic and Hydrophobic Polymer Blocks. ACS Nano 2023; 17:6932-6942. [PMID: 36972400 PMCID: PMC10100562 DOI: 10.1021/acsnano.3c00722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Polymer self-assembly leading to cooling-induced hydrogel formation is relatively rare for synthetic polymers and typically relies on H-bonding between repeat units. Here, we describe a non-H-bonding mechanism for a cooling-induced reversible order-order (sphere-to-worm) transition and related thermogelation of solutions of polymer self-assemblies. A multitude of complementary analytical tools allowed us to reveal that a significant fraction of the hydrophobic and hydrophilic repeat units of the underlying block copolymer is in close proximity in the gel state. This unusual interaction between hydrophilic and hydrophobic blocks reduces the mobility of the hydrophilic block significantly by condensing the hydrophilic block onto the hydrophobic micelle core, thereby affecting the micelle packing parameter. This triggers the order-order transition from well-defined spherical micelles to long worm-like micelles, which ultimately results in the inverse thermogelation. Molecular dynamics modeling indicates that this unexpected condensation of the hydrophilic corona onto the hydrophobic core is due to particular interactions between amide groups in the hydrophilic repeat units and phenyl rings in the hydrophobic ones. Consequently, changes in the structure of the hydrophilic blocks affecting the strength of the interaction could be used to control macromolecular self-assembly, thus allowing for the tuning of gel characteristics such as strength, persistence, and gelation kinetics. We believe that this mechanism might be a relevant interaction pattern for other polymeric materials as well as their interaction in and with biological environments. For example, controlling the gel characteristics could be considered important for applications in drug delivery or biofabrication.
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Affiliation(s)
- Lukas Hahn
- Institute
for Functional Materials and Biofabrication, Department of Chemistry
and Pharmacy, Julius-Maximilians-University
Würzburg, Röntgenring 11, 97070 Würzburg, Germany
- Institute
of Pharmacy and Food Chemistry, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Theresa Zorn
- Center
for Nanosystems Chemistry & Institute of Organic Chemistry, Department
of Chemistry and Pharmacy, Julius-Maximilians-University
Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Josef Kehrein
- Institute
of Pharmacy and Food Chemistry, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Tobias Kielholz
- Institute
of Pharmaceutical Technology and Buchmann Institute for Molecular
Life Sciences, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
| | - Anna-Lena Ziegler
- Institute
for Functional Materials and Biofabrication, Department of Chemistry
and Pharmacy, Julius-Maximilians-University
Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Stefan Forster
- Institute
for Functional Materials and Biofabrication, Department of Chemistry
and Pharmacy, Julius-Maximilians-University
Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Benedikt Sochor
- Chair for
X-Ray Microscopy, Julius-Maximilians-University
Würzburg, Josef-Martin-Weg
63, 97074 Würzburg, Germany
| | - Ekaterina S. Lisitsyna
- Faculty
of Engineering and Natural Science, Tampere
University, Korkeakoulunkatu 8, 33720 Tampere, Finland
| | - Nikita A. Durandin
- Faculty
of Engineering and Natural Science, Tampere
University, Korkeakoulunkatu 8, 33720 Tampere, Finland
| | - Timo Laaksonen
- Faculty
of Engineering and Natural Science, Tampere
University, Korkeakoulunkatu 8, 33720 Tampere, Finland
- Division
of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, 00014 Helsinki, Finland
| | - Vladimir Aseyev
- Soft
Matter Chemistry, Department of Chemistry, Helsinki Institute of Sustainability
Science, Faculty of Science, University
of Helsinki, 00014 Helsinki, Finland
| | - Christoph Sotriffer
- Institute
of Pharmacy and Food Chemistry, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Kay Saalwächter
- Institute
of Physics-NMR, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle, Germany
| | - Maike Windbergs
- Institute
of Pharmaceutical Technology and Buchmann Institute for Molecular
Life Sciences, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany
| | - Ann-Christin Pöppler
- Center
for Nanosystems Chemistry & Institute of Organic Chemistry, Department
of Chemistry and Pharmacy, Julius-Maximilians-University
Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Robert Luxenhofer
- Institute
for Functional Materials and Biofabrication, Department of Chemistry
and Pharmacy, Julius-Maximilians-University
Würzburg, Röntgenring 11, 97070 Würzburg, Germany
- Soft
Matter Chemistry, Department of Chemistry, Helsinki Institute of Sustainability
Science, Faculty of Science, University
of Helsinki, 00014 Helsinki, Finland
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7
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Scheller L, Bachmann S, Zorn T, Hanio S, Gbureck U, Fatouros D, Pöppler AC, Meinel L. Solid microemulsion preconcentrates on pH responsive metal-organic framework for tableting. Eur J Pharm Biopharm 2023; 186:105-111. [PMID: 36963469 DOI: 10.1016/j.ejpb.2023.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/26/2023]
Abstract
Poorly water-soluble drugs are frequently formulated with lipid-based formulations including microemulsions and their preconcentrates. We detailed the solidification of drug-loaded microemulsion preconcentrates with the acid-sensitive metal-organic framework ZIF-8 by X-ray powder diffraction and solid-state nuclear magnetic resonance spectroscopy. Adsorption and desorption dynamics were analyzed by fluorescence measurement, high-performance liquid chromatography, dynamic light scattering and 1H-DOSY experiments using the model compounds Nile Red, Vitamin K1, and Lumefantrine. Preconcentrates and drugs were successfully loaded onto ZIF-8 while preserving its crystal structure. The solid powder was pressable to tablets or 3D-printed into oral dosage forms. At low pH, colloidal solutions readily formed, solubilizing the poorly water-soluble compounds. The use of stimuli-responsive metal organic frameworks as carriers for the oral delivery of lipid-based formulations points towards solid dosage forms readily forming colloidal microemulsions.
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Affiliation(s)
- Lena Scheller
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany
| | - Stephanie Bachmann
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Theresa Zorn
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Simon Hanio
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University of Wuerzburg, Pleicherwall, 2, DE-97070 Wuerzburg, Germany
| | - Dimitrios Fatouros
- School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany; Helmholtz Institute for RNA-based Infection Research (HIRI), Josef-Schneider-Strasse, 2, 97080 Wuerzburg, Germany.
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8
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Repp S, Junginger KL, Sorsche D, Zorn T, Pöppler AC, Kikukawa Y, Hayashi Y, Streb C. Mechanistic insights into template-driven polyoxovanadate self-assembly: the role of internal and external templates. Dalton Trans 2023; 52:4002-4007. [PMID: 36877573 DOI: 10.1039/d3dt00252g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The self-assembly of molecular metal oxides, polyoxometalates (POMs), can be controlled using internal or, more rarely, external templates. Here, we explore how the interplay between internal templates (halides, oxoanions) and organic external templates (protonated cyclene species) affect the self-assembly of a model polyoxovanadate cluster, [V12O32X]n- (X = Cl-, Br-, NO3-). A combination of crystallographic analyses, spectroscopic studies and in situ as well as solid-state 51V NMR spectroscopy provide critical insights into the initial formation of an intermediate vanadate species formed during the process. Structural and spectroscopic studies suggest that a direct interaction between internal and external templates allows tuning of the internal template position within the cluster cavity. These insights form the basis for further developing the template-driven synthetic chemistry of polyoxovanadates.
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Affiliation(s)
- Stefan Repp
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Kim Lara Junginger
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Dieter Sorsche
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Theresa Zorn
- Institute of Organic Chemistry and Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany.
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry and Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany.
| | - Yuji Kikukawa
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
| | - Yoshihito Hayashi
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
| | - Carsten Streb
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany.,Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55131 Mainz, Germany.
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9
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Riefer J, Zapf L, Sprenger JAP, Wirthensohn R, Endres S, Pöppler AC, Gutmann M, Meinel L, Ignat'ev NV, Finze M. Cyano(fluoro)borate and cyano(hydrido)borate ionic liquids: low-viscosity ionic media for electrochemical applications. Phys Chem Chem Phys 2023; 25:5037-5048. [PMID: 36722915 DOI: 10.1039/d2cp05725e] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The synthesis and detailed characterization of low-viscosity room-temperature ionic liquids (RTILs) and [BnPh3P]+ salts with the cyano(fluoro)borate anions [BF(CN)3]- (MFB), [BF2(CN)2]- (DFB), and [BF3(CN)]- as well as the new mixed-substituted anion [BFH(CN)2]- (FHB) is described. The RTILs with [EMIm]+ or [BMPL]+ as countercations were obtained in yields of up to 98% from readily available alkali metal salts and in high purities that allow application in electrochemical devices. Trends in thermal stability, melting and freezing behavior, density, electrochemical stability, dynamic viscosity, specific conductivity and ion diffusivity have been assessed and compared to those of the related tetracyanoborate- and cyano(hydrido)borate-RTILs. The crystal structure analysis of the [BnPh3P]+ salts of [BFn(CN)4-n]- (n = 0-4), [BHn(CN)4-n]- (n = 1-3) and [BFH(CN)2]- provided experimental access to anion volumina that together with ion molecular mass, electrostatic potential, shape and chemical stability have been correlated to physicochemical properties. In addition, the cytotoxicity of the [EMIm]+-ILs and potassium or sodium salts was studied.
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Affiliation(s)
- Jarno Riefer
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074 Würzburg, Germany.
| | - Ludwig Zapf
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074 Würzburg, Germany.
| | - Jan A P Sprenger
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074 Würzburg, Germany.
| | - Raphael Wirthensohn
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074 Würzburg, Germany.
| | - Sebastian Endres
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany
| | - Ann-Christin Pöppler
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany
| | - Marcus Gutmann
- Julius-Maximilians-Universität Würzburg, Institut für Pharmazie und Lebensmittelchemie, Am Hubland, 97074 Würzburg, Germany
| | - Lorenz Meinel
- Julius-Maximilians-Universität Würzburg, Institut für Pharmazie und Lebensmittelchemie, Am Hubland, 97074 Würzburg, Germany
| | - Nikolai V Ignat'ev
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074 Würzburg, Germany. .,Consultant, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Maik Finze
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074 Würzburg, Germany.
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10
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Scheidel S, Östreicher L, Mark I, Pöppler AC. You cannot fight the pressure: Structural rearrangements of active pharmaceutical ingredients under magic angle spinning. Magn Reson Chem 2022; 60:572-582. [PMID: 35277897 DOI: 10.1002/mrc.5267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
Although solid-state nuclear magnetic resonance (NMR) is a versatile analytical tool to study polymorphs and phase transitions of pharmaceutical molecules and products, this work summarizes examples of spontaneous and unexpected (and unwanted) structural rearrangements and phase transitions (amorphous-to-crystalline and crystalline-to-crystalline) under magic angle spinning (MAS) conditions, some of them clearly being due to the pressure experienced by the samples. It is widely known that such changes can often be detected by X-ray powder diffraction (XRPD); here, the capability of solid-state NMR experiments with a special focus on 1 H-13 C frequency-switched Lee-Goldburg heteronuclear correlation (FSLG HETCOR)/MAS NMR experiments to detect even subtle changes on a molecular level not observable by conventional 1D NMR experiments or XRPD is presented. Furthermore, it is shown that a polymorphic impurity combined with MAS can induce a crystalline-to-crystalline phase transition. This showcases that solid-state NMR is not always noninvasive and such changes upon MAS should be considered in particular when compounds are studied over longer time spans.
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Affiliation(s)
- Sebastian Scheidel
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Laurina Östreicher
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Isabelle Mark
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
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11
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Endres S, Karaev E, Hanio S, Schlauersbach J, Kraft C, Rasmussen T, Luxenhofer R, Böttcher B, Meinel L, Pöppler AC. Concentration and composition dependent aggregation of Pluronic- and Poly-(2-oxazolin)-Efavirenz formulations in biorelevant media. J Colloid Interface Sci 2022; 606:1179-1192. [PMID: 34487937 DOI: 10.1016/j.jcis.2021.08.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/26/2021] [Accepted: 08/07/2021] [Indexed: 01/03/2023]
Abstract
Many drugs and drug candidates are poorly water-soluble. Intestinal fluids play an important role in their solubilization. However, the interactions of intestinal fluids with polymer excipients, drugs and their formulations are not fully understood. Here, diffusion ordered spectroscopy (DOSY) and nuclear Overhauser effect spectroscopy (NOESY), complemented by cryo-TEM were employed to address this. Efavirenz (EFV) as model drug, the triblock copolymers Pluronic® F-127 (PF127) and poly(2-oxazoline) based pMeOx-b-pPrOzi-b-pMeOx (pOx/pOzi) and their respective formulations were studied in simulated fed-state intestinal fluid (FeSSIF). For the individual polymers, the bile interfering nature of PF127 was confirmed and pure pOx/pOzi was newly classified as non-interfering. A different and more complex behaviour was however observed if EFV was involved. PF127/EFV formulations in FeSSIF showed concentration dependent aggregation with separate colloids at low formulation concentrations, a merging of individual particles at the solubility limit of EFV in FeSSIF and joint aggregates above this concentration. In the case of pOx/pOzi/EFV formulations, coincident diffusion coefficients for pOx/pOzi, lipids and EFV indicate joint aggregates across the studied concentration range. This demonstrates that separate evaluation of polymers and drugs in biorelevant media is not sufficient and their mixtures need to be studied to learn about concentration and composition dependent behaviour.
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Affiliation(s)
- Sebastian Endres
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Emil Karaev
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Simon Hanio
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Jonas Schlauersbach
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Christian Kraft
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Würzburg, Würzburg 97080, Germany
| | - Tim Rasmussen
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Würzburg, Würzburg 97080, Germany; Biocenter, University of Würzburg, Würzburg 97074, Germany
| | - Robert Luxenhofer
- Soft Matter Chemistry, Department of Chemistry, Helsinki University, Helsinki 00014, Finland
| | - Bettina Böttcher
- Rudolf Virchow Center, Center for Integrative and Translational Bioimaging, University of Würzburg, Würzburg 97080, Germany; Biocenter, University of Würzburg, Würzburg 97074, Germany
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany; Helmholtz Institute for RNA-based Infection Biology (HIRI), Wuerzburg DE-97070, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany.
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12
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Greiner S, Hettig J, Laws A, Baumgärtner K, Bustos J, Pöppler AC, Adam C, Nyman M, Streb C, Anjass M. A General Access Route to High-Nuclearity, Metal-Functionalized Molecular Vanadium Oxides. Angew Chem Int Ed Engl 2021; 61:e202114548. [PMID: 34936179 PMCID: PMC9302674 DOI: 10.1002/anie.202114548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Indexed: 10/26/2022]
Abstract
Molecular metal oxides are key materials in diverse fields like energy storage and conversion, molecular magnetism and as model systems for solid-state metal oxides. To improve their performance and increase the variety of accessible motifs, new synthetic approaches are necessary. Herein, we report a universal, new precursor to access different metal-functionalized polyoxovanadate (POV) clusters. The precursor is synthesized by a novel solid-state thermal treatment procedure. Solution-phase test reactions at room temperature and pressure show that reaction of the precursor with various metal nitrate salts gives access to a range of metal-functionalized POVs. The first nitrate-templated molecular calcium vanadate cluster is reported. We show that this precursor could open new access routes to POV components for molecular magnetism, energy technologies or catalysis.
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Affiliation(s)
| | - Jan Hettig
- Ulm University: Universitat Ulm, Chemistry, GERMANY
| | - Alec Laws
- Ulm University: Universitat Ulm, Chemistry, GERMANY
| | | | - Jenna Bustos
- Oregon State University, Chemistry, UNITED STATES
| | | | - Clark Adam
- Paul Scherrer Institute: Paul Scherrer Institut, Chemistry, SWITZERLAND
| | - May Nyman
- Oregon State University, Chemistry, UNITED STATES
| | - Carsten Streb
- Ulm University: Universitat Ulm, Institute of Inorganic Chemistry I, Albert-Einstein-Allee 11, 89081, Ulm, GERMANY
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13
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Bekiş DF, Küllmey T, Ghazanfari MR, Burda R, Voloshina E, von Randow CA, Fuß F, Liesegang M, Paulus B, Pöppler AC, Thiele G. Ino-Chloridolithates from Ionothermal Synthesis. Inorg Chem 2021; 60:19145-19151. [PMID: 34878258 DOI: 10.1021/acs.inorgchem.1c02943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Anionic lithium-containing species were predicted to impact ionic liquid-based electrochemical applications but have hitherto never been isolated from ionic liquid systems. Here, we report the first representatives of this class of compounds, ino-chloridolithates, comprising [LiCl2]- and [Li2Cl3]- polyanions from ionothermal reactions. Such compounds are obtained at moderate temperatures with imidazolium-based ionic liquids and LiCl. The addition of an auxiliary ammonium salt enhances the lattice energy to yield an ammonium lithate in good yields, which enables extensive investigations including solid-state nuclear magnetic resonance, infrared, and Raman spectroscopy. The structural motifs of ino-lithates are related to ino-silicates, as 1D-extended anionic substructures are formed. Despite this analogy, according to density functional theory calculations with periodic boundary conditions, no evidence of covalent bonding in the anionic moieties is found-indicating packing effects to be the main cause for the formation. Based on an in-depth analysis of the different synthetic parameters, this class of compounds is discussed as an intermediate in ionic liquid applications and could serve as a model system for electrochemical lithium-based systems.
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Affiliation(s)
- Deniz F Bekiş
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Tim Küllmey
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Mohammad R Ghazanfari
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Robert Burda
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Elena Voloshina
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Clara A von Randow
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Friederike Fuß
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Moritz Liesegang
- Institut für Geologische Wissenschaften, Freie Universität Berlin, Malteserstraße 74-100, 12249 Berlin, Germany
| | - Beate Paulus
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Ann-Christin Pöppler
- Institut für Organische Chemie, Universität Würzburg, Am Hubland 16, 97074 Würzburg, Germany
| | - Günther Thiele
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
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14
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Hahn L, Karakaya E, Zorn T, Sochor B, Maier M, Stahlhut P, Forster S, Fischer K, Seiffert S, Pöppler AC, Detsch R, Luxenhofer R. An Inverse Thermogelling Bioink Based on an ABA-Type Poly(2-oxazoline) Amphiphile. Biomacromolecules 2021; 22:3017-3027. [PMID: 34100282 DOI: 10.1021/acs.biomac.1c00427] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Hydrogels are key components in several biomedical research areas such as drug delivery, tissue engineering, and biofabrication. Here, a novel ABA-type triblock copolymer comprising poly(2-methyl-2-oxazoline) as the hydrophilic A blocks and poly(2-phenethyl-2-oxazoline) as the aromatic and hydrophobic B block is introduced. Above the critical micelle concentration, the polymer self-assembles into small spherical polymer micelles with a hydrodynamic radius of approx 8-8.5 nm. Interestingly, this specific combination of hydrophilic and hydrophobic aromatic moieties leads to rapid thermoresponsive inverse gelation at polymer concentrations above a critical gelation concentration (20 wt %) into a macroporous hydrogel of densely packed micelles. This hydrogel exhibited pronounced viscoelastic solid-like properties, as well as extensive shear-thinning, rapid structure recovery, and good strain resistance properties. Excellent 3D-printability of the hydrogel at lower temperature opens a wide range of different applications, for example, in the field of biofabrication. In preliminary bioprinting experiments using NIH 3T3 cells, excellent cell viabilities of more than 95% were achieved. The particularly interesting feature of this novel material is that it can be used as a printing support in hybrid bioink systems and sacrificial bioink due to rapid dissolution at physiological conditions.
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Affiliation(s)
- Lukas Hahn
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Röntgenring 11, Würzburg 97070, Germany
| | - Emine Karakaya
- Institute of Biomaterials, Friedrich Alexander University of Erlangen-Nürnberg, Cauerstr. 6, Erlangen 91058, Germany
| | - Theresa Zorn
- Institute of Organic Chemistry, Julius-Maximilians-University Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Benedikt Sochor
- Chair for X-Ray Microscopy, Julius-Maximilians-University Würzburg, Josef-Martin-Weg 63, Würzburg 97074, Germany
| | - Matthias Maier
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Röntgenring 11, Würzburg 97070, Germany
| | - Philipp Stahlhut
- Department for Functional Materials in Medicine and Dentistry, Julius-Maximilians-University Würzburg, Pleicherwall 2, Würzburg 97070, Germany
| | - Stefan Forster
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Röntgenring 11, Würzburg 97070, Germany
| | - Karl Fischer
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, Mainz 55128, Germany
| | - Sebastian Seiffert
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, Mainz 55128, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, Julius-Maximilians-University Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Rainer Detsch
- Institute of Biomaterials, Friedrich Alexander University of Erlangen-Nürnberg, Cauerstr. 6, Erlangen 91058, Germany
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, Julius-Maximilians-University Würzburg, Röntgenring 11, Würzburg 97070, Germany.,Soft Matter Chemistry, Department of Chemistry and Helsinki Institute of Sustainability Science, Faculty of Science, University of Helsinki, Helsinki 00014, Finland
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15
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Hanio S, Schlauersbach J, Lenz B, Spiegel F, Böckmann RA, Schweins R, Nischang I, Schubert US, Endres S, Pöppler AC, Brandl FP, Smit TM, Kolter K, Meinel L. Drug-Induced Dynamics of Bile Colloids. Langmuir 2021; 37:2543-2551. [PMID: 33587852 DOI: 10.1021/acs.langmuir.0c02282] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bile colloids containing taurocholate and lecithin are essential for the solubilization of hydrophobic molecules including poorly water-soluble drugs such as Perphenazine. We detail the impact of Perphenazine concentrations on taurocholate/lecithin colloids using analytical ultracentrifugation, dynamic light scattering, small-angle neutron scattering, nuclear magnetic resonance spectroscopy, coarse-grained molecular dynamics simulations, and isothermal titration calorimetry. Perphenazine impacted colloidal molecular arrangement, structure, and binding thermodynamics in a concentration-dependent manner. At low concentration, Perphenazine was integrated into stable and large taurocholate/lecithin colloids and close to lecithin. Integration of Perphenazine into these colloids was exothermic. At higher Perphenazine concentration, the taurocholate/lecithin colloids had an approximately 5-fold reduction in apparent hydrodynamic size, heat release was less exothermic upon drug integration into the colloids, and Perphenazine interacted with both lecithin and taurocholate. In addition, Perphenazine induced a morphological transition from vesicles to wormlike micelles as indicated by neutron scattering. Despite these surprising colloidal dynamics, these natural colloids successfully ensured stable relative amounts of free Perphenazine throughout the entire drug concentration range tested here. Future studies are required to further detail these findings both on a molecular structural basis and in terms of in vivo relevance.
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Affiliation(s)
- Simon Hanio
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Jonas Schlauersbach
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Bettina Lenz
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
| | - Franziska Spiegel
- Computational Biology, Friedrich Alexander-University Erlangen-Nürnberg, Staudtstrasse 5, 91057 Erlangen, Germany
| | - Rainer A Böckmann
- Computational Biology, Friedrich Alexander-University Erlangen-Nürnberg, Staudtstrasse 5, 91057 Erlangen, Germany
| | - Ralf Schweins
- Institut Laue-Langevin, DS/LSS, 71 Avenue des Martyrs, CS 20 156, 38042 Grenoble, CEDEX 9, France
| | - Ivo Nischang
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Sebastian Endres
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg Germany
| | | | - Theo M Smit
- BASF SE, R&D Pharma Ingredients, 67063 Ludwigshafen, Germany
| | - Karl Kolter
- BASF SE, R&D Pharma Ingredients, 67063 Ludwigshafen, Germany
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany
- Helmholtz Institute for RNA-based Infection Research (HIRI), Josef-Schneider-Strasse 2, 97080 Wuerzburg, Germany
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16
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Schlauersbach J, Hanio S, Lenz B, Vemulapalli SPB, Griesinger C, Pöppler AC, Harlacher C, Galli B, Meinel L. Leveraging bile solubilization of poorly water-soluble drugs by rational polymer selection. J Control Release 2020; 330:36-48. [PMID: 33333120 DOI: 10.1016/j.jconrel.2020.12.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 11/03/2020] [Accepted: 12/11/2020] [Indexed: 12/12/2022]
Abstract
Poorly water-soluble drugs frequently solubilize into bile colloids and this natural mechanism is key for efficient bioavailability. We tested the impact of pharmaceutical polymers on this solubilization interplay using proton nuclear magnetic resonance spectroscopy, dynamic light scattering, and by assessing the flux across model membranes. Eudragit E, Soluplus, and a therapeutically used model polymer, Colesevelam, impacted the bile-colloidal geometry and molecular interaction. These polymer-induced changes reduced the flux of poorly water-soluble and bile interacting drugs (Perphenazine, Imatinib) but did not impact the flux of bile non-interacting Metoprolol. Non-bile interacting polymers (Kollidon VA 64, HPMC-AS) neither impacted the flux of colloid-interacting nor colloid-non-interacting drugs. These insights into the drug substance/polymer/bile colloid interplay potentially point towards a practical optimization parameter steering formulations to efficient bile-solubilization by rational polymer selection.
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Affiliation(s)
- Jonas Schlauersbach
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Simon Hanio
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Bettina Lenz
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | | | - Christian Griesinger
- Max Planck Institute for Biophysical Chemistry, Am Faßberg 11, DE-37077 Goetingen, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | | | - Bruno Galli
- Novartis Pharma AG, Lichtstrasse 35, CH-4056 Basel, Switzerland
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany; Helmholtz Institute for RNA-based Infection Biology (HIRI), DE-97070 Wuerzburg, Germany.
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17
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Lambov M, Hensiek N, Pöppler AC, Lehmann M. Columnar Liquid Crystals from Star-Shaped Conjugated Mesogens as Nano-Reservoirs for Small Acceptors. Chempluschem 2020; 85:2219-2229. [PMID: 32691985 DOI: 10.1002/cplu.202000341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/24/2020] [Indexed: 11/12/2022]
Abstract
Shape-persistent conjugated mesogens with oligothiophene arms of different lengths have been synthesized. Such mesogens possess free intrinsic space between their conjugated arms. They form columnar liquid-crystalline phases, in which the void is filled by dense helical packing in the neat phase similar to an oligo(phenylene vinylene) derivative of equal size. The void can also be compensated by the inclusion of the small acceptor molecule 2,4,7-trinitrofluorenone. In solution, the acceptor interacts with the core as the largest π-surface, while in the solid material, it is incorporated between the arms and sandwiched by the star-shaped neighbours along the columnar assemblies. The TNF acceptors are not nanosegregated from the star-shaped donors, thus the liquid crystal structure converts to a nano-reservoir for TNF (endo-receptor). These host-guest arrangements are confirmed by comprehensive X-ray scattering experiments and solid-state NMR spectroscopy. This results in ordered columnar hexagonal phases at high temperatures, which change to helical columnar mesophases or to columnar soft crystals at room temperature.
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Affiliation(s)
- Martin Lambov
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Nicola Hensiek
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Matthias Lehmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.,Center for Nanosystems Chemistry and Bavarian Polymer Institute, Theodor-Boveri-Weg 4, 97074, Würzburg, Germany
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18
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Haider MS, Lübtow MM, Endres S, Forster S, Flegler VJ, Böttcher B, Aseyev V, Pöppler AC, Luxenhofer R. Think Beyond the Core: Impact of the Hydrophilic Corona on Drug Solubilization Using Polymer Micelles. ACS Appl Mater Interfaces 2020; 12:24531-24543. [PMID: 32378873 DOI: 10.1021/acsami.9b22495] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polymeric micelles are typically characterized as core-shell structures. The hydrophobic core is considered as a depot for hydrophobic molecules, and the corona-forming block acts as a stabilizing and solubilizing interface between the core and aqueous milieu. Tremendous efforts have been made to tune the hydrophobic block to increase the drug loading and stability of micelles, whereas the role of hydrophilic blocks is rarely investigated in this context, with poly(ethylene glycol) (PEG) being the gold standard of hydrophilic polymers. To better understand the role of the hydrophilic corona, a small library of structurally similar A-B-A-type amphiphiles based on poly(2-oxazoline)s and poly(2-oxazine)s is investigated by varying the hydrophilic block A utilizing poly(2-methyl-2-oxazoline) (pMeOx; A) or poly(2-ethyl-2-oxazoline) (pEtOx; A*). In terms of hydrophilicity, both polymers closely resemble PEG. The more hydrophobic block B bears either a poly(2-oxazoline) and poly(2-oxazine) backbone with C3 (propyl) and C4 (butyl) side chains. Surprisingly, major differences in loading capacities from A-B-A > A*-B-A > A*-B-A* is observed for the formulation with two poorly water-soluble compounds, curcumin and paclitaxel, highlighting the importance of the hydrophilic corona of polymer micelles used for drug formulation. The formulations are also characterized by various nuclear magnetic resonance spectroscopy methods, dynamic light scattering, cryogenic transmission electron microscopy, and (micro) differential scanning calorimetry. Our findings suggest that the interaction between the hydrophilic block and the guest molecule should be considered an important, but previously largely ignored, factor for the rational design of polymeric micelles.
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Affiliation(s)
- Malik Salman Haider
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and Bavarian Polymer Institute, Faculty of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Michael M Lübtow
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and Bavarian Polymer Institute, Faculty of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Sebastian Endres
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Stefan Forster
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and Bavarian Polymer Institute, Faculty of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Vanessa J Flegler
- Biocenter and Rudolf Virchow Centre, University of Würzburg, Haus D15, Josef-Schneider-Str. 2, 97080 Würzburg, Germany
| | - Bettina Böttcher
- Biocenter and Rudolf Virchow Centre, University of Würzburg, Haus D15, Josef-Schneider-Str. 2, 97080 Würzburg, Germany
| | - Vladimir Aseyev
- Department of Chemistry, University of Helsinki, PB 55, Helsinki FIN-00014, Finland
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and Bavarian Polymer Institute, Faculty of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
- Department of Chemistry, University of Helsinki, PB 55, Helsinki FIN-00014, Finland
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19
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Grüne M, Luxenhofer R, Iuga D, Brown SP, Pöppler AC. 14N–1H HMQC solid-state NMR as a powerful tool to study amorphous formulations – an exemplary study of paclitaxel loaded polymer micelles. J Mater Chem B 2020; 8:6827-6836. [DOI: 10.1039/d0tb00614a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
14N–1H HMQC experiments are powerful experiments to characterize amorphous drug–polymer formulations of paclitaxel yielding well-separated signals in the 14N dimension as well as information on the symmetry of 14N and 14N–1H interactions.
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Affiliation(s)
- Marvin Grüne
- Institute of Organic Chemistry
- University of Würzburg
- 97074 Würzburg
- Germany
| | - Robert Luxenhofer
- Lehrstuhl für Chemische Technologie der Materialsynthese
- University of Würzburg
- 97070 Würzburg
- Germany
| | - Dinu Iuga
- Department of Physics
- University of Warwick
- Coventry
- UK
| | | | | |
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20
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Pöppler AC, Lübtow MM, Schlauersbach J, Wiest J, Meinel L, Luxenhofer R. Loading-Dependent Structural Model of Polymeric Micelles Encapsulating Curcumin by Solid-State NMR Spectroscopy. Angew Chem Int Ed Engl 2019; 58:18540-18546. [PMID: 31529576 PMCID: PMC6916580 DOI: 10.1002/anie.201908914] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/04/2019] [Indexed: 12/13/2022]
Abstract
Detailed insight into the internal structure of drug‐loaded polymeric micelles is scarce, but important for developing optimized delivery systems. We observed that an increase in the curcumin loading of triblock copolymers based on poly(2‐oxazolines) and poly(2‐oxazines) results in poorer dissolution properties. Using solid‐state NMR spectroscopy and complementary tools we propose a loading‐dependent structural model on the molecular level that provides an explanation for these pronounced differences. Changes in the chemical shifts and cross‐peaks in 2D NMR experiments give evidence for the involvement of the hydrophobic polymer block in the curcumin coordination at low loadings, while at higher loadings an increase in the interaction with the hydrophilic polymer blocks is observed. The involvement of the hydrophilic compartment may be critical for ultrahigh‐loaded polymer micelles and can help to rationalize specific polymer modifications to improve the performance of similar drug delivery systems.
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Affiliation(s)
- Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Michael M Lübtow
- Lehrstuhl für Chemische Technologie der Materialsynthese, University of Würzburg, Röntgenring 11, 97070, Würzburg, Germany
| | - Jonas Schlauersbach
- Institute for Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Johannes Wiest
- Institute for Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Lorenz Meinel
- Institute for Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Robert Luxenhofer
- Lehrstuhl für Chemische Technologie der Materialsynthese, University of Würzburg, Röntgenring 11, 97070, Würzburg, Germany
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21
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Blöhbaum J, Paulus I, Pöppler AC, Tessmar J, Groll J. Influence of charged groups on the cross-linking efficiency and release of guest molecules from thiol-ene cross-linked poly(2-oxazoline) hydrogels. J Mater Chem B 2019; 7:1782-1794. [PMID: 32254920 PMCID: PMC6592217 DOI: 10.1039/c8tb02575d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 01/16/2019] [Indexed: 12/21/2022]
Abstract
We describe the preparation of hydrogels using highly functionalized poly(oxazoline) based polymeric precursors and cross-linking via UV mediated radical thiol-ene chemistry. Random copolymers were synthesized based on the combination of the more hydrophilic 2-methyl-2-oxazoline or the less hydrophilic monomer 2-ethyl-2-oxazoline with 2-(3-butenyl)-2-oxazoline. These copolymers were functionalized via a post-polymerization technique with thiol or cysteine functionality at the side chain. Hence, hydrogels were obtained, for which the thermo-responsive behavior, network density and correlated properties such as swelling and mechanics, as well as the possibility of electrostatic interaction, can be tuned. Cell culture tests demonstrated good cytocompatibility of the synthesized copolymers and hydrogels. A study with two low molecular weight substances, methylene blue and fluorescein sodium, was performed to investigate how the thermo-responsive behavior or the positive charge incorporated by cysteine could influence the interaction with the compounds. It was found that the interaction with the hydrogel network was strongly influenced by the chemical properties of the dye. A hydrophilic and positively charged hydrogel network was shown to be a promising candidate for the uptake and prolonged release of negatively charged low molecular weight substances.
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Affiliation(s)
- Julia Blöhbaum
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI)
, University of Würzburg
,
Pleicherwall 2
, 97070 Würzburg
, Germany
.
| | - Ilona Paulus
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI)
, University of Würzburg
,
Pleicherwall 2
, 97070 Würzburg
, Germany
.
| | - Ann-Christin Pöppler
- Institute of Organic Chemistry
, University of Würzburg
, Am Hubland
,
97074 Würzburg
, Germany
| | - Jörg Tessmar
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI)
, University of Würzburg
,
Pleicherwall 2
, 97070 Würzburg
, Germany
.
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI)
, University of Würzburg
,
Pleicherwall 2
, 97070 Würzburg
, Germany
.
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Krause L, Pöppler AC, Brown SP, Herbst-Irmer R, Stalke D. SPAnPS – the radiant polymorphs. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317088192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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23
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Pöppler AC. Filling Blank Spots on the Map: Identification of Ligand Binding Modes and Interacting Water Molecules for Brd4-BD1 by WaterLOGSY Titrations. J Med Chem 2017; 60:8706-8707. [PMID: 29083896 DOI: 10.1021/acs.jmedchem.7b01497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fragment-based drug discovery and continuous improvement of existing protein inhibitors rely on the knowledge of exactly how and how strongly a range of small molecules bind to their respective protein targets. By increasing the (perdeuterated) protein concentration, WaterLOGSY titration experiments give access to ligand binding modes even in the case of weak binders as well as to the location of protein-bound water in the surroundings of the ligand. On the basis of these findings, specific chemical modifications of the ligand could be shown to yield significantly enhanced binding affinities.
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Affiliation(s)
- Ann-Christin Pöppler
- Institute of Organic Chemistry, University of Würzburg , Am Hubland, 97074 Würzburg, Germany
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24
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Pöppler AC, Corlett EK, Pearce H, Seymour MP, Reid M, Montgomery MG, Brown SP. Single-crystal X-ray diffraction and NMR crystallography of a 1:1 cocrystal of dithianon and pyrimethanil. Acta Crystallogr C Struct Chem 2017; 73:149-156. [PMID: 28257008 PMCID: PMC5391860 DOI: 10.1107/s2053229617000870] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/17/2017] [Indexed: 11/11/2022] Open
Abstract
A single-crystal X-ray diffraction structure of a 1:1 cocrystal of two fungicides, namely dithianon (DI) and pyrimethanil (PM), is reported [systematic name: 5,10-dioxo-5H,10H-naphtho[2,3-b][1,4]dithiine-2,3-dicarbonitrile-4,6-dimethyl-N-phenylpyrimidin-2-amine (1/1), C14H4N2O2S2·C12H13N2]. Following an NMR crystallography approach, experimental solid-state magic angle spinning (MAS) NMR spectra are presented together with GIPAW (gauge-including projector augmented wave) calculations of NMR chemical shieldings. Specifically, experimental 1H and 13C chemical shifts are determined from two-dimensional 1H-13C MAS NMR correlation spectra recorded with short and longer contact times so as to probe one-bond C-H connectivities and longer-range C...H proximities, whereas H...H proximities are identified in a 1H double-quantum (DQ) MAS NMR spectrum. The performing of separate GIPAW calculations for the full periodic crystal structure and for isolated molecules allows the determination of the change in chemical shift upon going from an isolated molecule to the full crystal structure. For the 1H NMR chemical shifts, changes of 3.6 and 2.0 ppm correspond to intermolecular N-H...O and C-H...O hydrogen bonding, while changes of -2.7 and -1.5 ppm are due to ring current effects associated with C-H...π interactions. Even though there is a close intermolecular S...O distance of 3.10 Å, it is of note that the molecule-to-crystal chemical shifts for the involved sulfur or oxygen nuclei are small.
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Affiliation(s)
- Ann-Christin Pöppler
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
- Department of Organic Chemistry, University of Würzburg, 97074 Würzburg, Germany
| | - Emily K. Corlett
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
- Molecular Analytical Science Centre for Doctoral Training, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Harriet Pearce
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
- Molecular Analytical Science Centre for Doctoral Training, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Mark P. Seymour
- International Research Centre, Syngenta, Jealott’s Hill, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Matthew Reid
- International Research Centre, Syngenta, Jealott’s Hill, Bracknell, Berkshire RG42 6EY, United Kingdom
- Afton Chemical, London Road, Bracknell, Berkshire RG12 2UW, United Kingdom
| | - Mark G. Montgomery
- International Research Centre, Syngenta, Jealott’s Hill, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Steven P. Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
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25
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Pöppler AC, Walker D, Brown SP. A combined NMR crystallographic and PXRD investigation of the structure-directing role of water molecules in orotic acid and its lithium and magnesium salts. CrystEngComm 2017. [DOI: 10.1039/c6ce02101h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Simmons TJ, Mortimer JC, Bernardinelli OD, Pöppler AC, Brown SP, deAzevedo ER, Dupree R, Dupree P. Folding of xylan onto cellulose fibrils in plant cell walls revealed by solid-state NMR. Nat Commun 2016; 7:13902. [PMID: 28000667 PMCID: PMC5187587 DOI: 10.1038/ncomms13902] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 11/10/2016] [Indexed: 11/25/2022] Open
Abstract
Exploitation of plant lignocellulosic biomass is hampered by our ignorance of the molecular basis for its properties such as strength and digestibility. Xylan, the most prevalent non-cellulosic polysaccharide, binds to cellulose microfibrils. The nature of this interaction remains unclear, despite its importance. Here we show that the majority of xylan, which forms a threefold helical screw in solution, flattens into a twofold helical screw ribbon to bind intimately to cellulose microfibrils in the cell wall. 13C solid-state magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy, supported by in silico predictions of chemical shifts, shows both two- and threefold screw xylan conformations are present in fresh Arabidopsis stems. The twofold screw xylan is spatially close to cellulose, and has similar rigidity to the cellulose microfibrils, but reverts to the threefold screw conformation in the cellulose-deficient irx3 mutant. The discovery that induced polysaccharide conformation underlies cell wall assembly provides new principles to understand biomass properties.
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Affiliation(s)
- Thomas J. Simmons
- Department of Biochemistry and Leverhulme Centre for Natural Material Innovation, Hopkins Building, Downing Site, University of Cambridge, Cambridge CB2 1QW, UK
| | - Jenny C. Mortimer
- Department of Biochemistry and Leverhulme Centre for Natural Material Innovation, Hopkins Building, Downing Site, University of Cambridge, Cambridge CB2 1QW, UK
| | - Oigres D. Bernardinelli
- Department of Biochemistry and Leverhulme Centre for Natural Material Innovation, Hopkins Building, Downing Site, University of Cambridge, Cambridge CB2 1QW, UK
- Instituto de Física de São Carlos, Departamento de Física e Ciência Interdisciplinar, Universidade de São Paulo, Caixa Postal 369, São Carlos, Sao needs, São Paulo 13660-970, Brazil
- Department of Physics, University of Warwick, Coventry CV4 7AL, UK
| | | | - Steven P. Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, UK
| | - Eduardo R. deAzevedo
- Instituto de Física de São Carlos, Departamento de Física e Ciência Interdisciplinar, Universidade de São Paulo, Caixa Postal 369, São Carlos, Sao needs, São Paulo 13660-970, Brazil
| | - Ray Dupree
- Department of Physics, University of Warwick, Coventry CV4 7AL, UK
| | - Paul Dupree
- Department of Biochemistry and Leverhulme Centre for Natural Material Innovation, Hopkins Building, Downing Site, University of Cambridge, Cambridge CB2 1QW, UK
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27
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Pöppler AC, Demers JP, Malon M, Singh AP, Roesky HW, Nishiyama Y, Lange A. Back Cover: Ultrafast Magic-Angle Spinning: Benefits for the Acquisition of Ultrawide-Line NMR Spectra of Heavy Spin-1/2 Nuclei (ChemPhysChem 6/2016). Chemphyschem 2016. [DOI: 10.1002/cphc.201600125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ann-Christin Pöppler
- Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
- Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
- Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
| | - Jean-Philippe Demers
- Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
- Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
- Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
| | - Michal Malon
- JEOL RESONANCE Inc.; 3-1-2 Musashino Akishima Tokyo 196-8558 Japan
- RIKEN CLST-JEOL Collaboration Center, Suehiro-cho, Tsurumi; Yokohama Kanagawa 230-0045 Japan
| | - Amit Pratap Singh
- Institut für Anorganische Chemie; Universität Göttingen; Tammannstrasse 4 37077 Göttingen Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie; Universität Göttingen; Tammannstrasse 4 37077 Göttingen Germany
| | - Yusuke Nishiyama
- JEOL RESONANCE Inc.; 3-1-2 Musashino Akishima Tokyo 196-8558 Japan
- RIKEN CLST-JEOL Collaboration Center, Suehiro-cho, Tsurumi; Yokohama Kanagawa 230-0045 Japan
| | - Adam Lange
- Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
- Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
- Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
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Pöppler AC, Demers JP, Malon M, Singh AP, Roesky HW, Nishiyama Y, Lange A. Ultrafast Magic-Angle Spinning: Benefits for the Acquisition of Ultrawide-Line NMR Spectra of Heavy Spin-1/2 Nuclei. Chemphyschem 2016; 17:812-6. [DOI: 10.1002/cphc.201501136] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Ann-Christin Pöppler
- Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
- Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
- Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
| | - Jean-Philippe Demers
- Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
- Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
- Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
| | - Michal Malon
- JEOL RESONANCE Inc.; 3-1-2 Musashino Akishima Tokyo 196-8558 Japan
- RIKEN CLST-JEOL Collaboration Center, Suehiro-cho, Tsurumi; Yokohama Kanagawa 230-0045 Japan
| | - Amit Pratap Singh
- Institut für Anorganische Chemie; Universität Göttingen; Tammannstrasse 4 37077 Göttingen Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie; Universität Göttingen; Tammannstrasse 4 37077 Göttingen Germany
| | - Yusuke Nishiyama
- JEOL RESONANCE Inc.; 3-1-2 Musashino Akishima Tokyo 196-8558 Japan
- RIKEN CLST-JEOL Collaboration Center, Suehiro-cho, Tsurumi; Yokohama Kanagawa 230-0045 Japan
| | - Adam Lange
- Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
- Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
- Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
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Pöppler AC, Granitzka M, Herbst-Irmer R, Chen YS, Iversen BB, John M, Mata RA, Stalke D. Characterization of a Multicomponent Lithium Lithiate from a Combined X-Ray Diffraction, NMR Spectroscopy, and Computational Approach. Angew Chem Int Ed Engl 2014; 53:13282-7. [DOI: 10.1002/anie.201406320] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Indexed: 11/10/2022]
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30
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Pöppler AC, Frischkorn S, Stalke D, John M. Toluene and Lithium Amide Diffusion into Polystyrene: A Slice-Selective NMR-Spectroscopic Study. Chemphyschem 2013; 14:3103-7. [DOI: 10.1002/cphc.201300609] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Indexed: 11/12/2022]
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31
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Pöppler AC, Keil H, Stalke D, John M. 7Li-quadrupolare Restkopplungen zur Bestimmung des Aggregationsgrades von Organolithiumverbindungen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202116] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Pöppler AC, Keil H, Stalke D, John M. 7Li Residual Quadrupolar Couplings as a Powerful Tool To Identify the Degree of Organolithium Aggregation. Angew Chem Int Ed Engl 2012; 51:7843-6. [DOI: 10.1002/anie.201202116] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 05/04/2012] [Indexed: 11/06/2022]
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33
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Granitzka M, Pöppler AC, Schwarze EK, Stern D, Schulz T, John M, Herbst-Irmer R, Pandey SK, Stalke D. Aggregation of Donor Base Stabilized 2-Thienyllithium in a Single Crystal and in Solution: Distances from X-ray Diffraction and the Nuclear Overhauser Effect. J Am Chem Soc 2011; 134:1344-51. [DOI: 10.1021/ja210382c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Markus Granitzka
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Ann-Christin Pöppler
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Eike K. Schwarze
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Daniel Stern
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Thomas Schulz
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Michael John
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Regine Herbst-Irmer
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Sushil K. Pandey
- Department of Chemistry, University of Jammu, Jammu-180 006, India
| | - Dietmar Stalke
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
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Affiliation(s)
- Ann-Christin Pöppler
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Margret M. Meinholz
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Hannes Faßhuber
- Max-Planck-Institut für biophysikalische Chemie, Am Faßberg 11, 37077 Göttingen, Germany
| | - Adam Lange
- Max-Planck-Institut für biophysikalische Chemie, Am Faßberg 11, 37077 Göttingen, Germany
| | - Michael John
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
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Souto JA, Vaz E, Lepore I, Pöppler AC, Franci G, Álvarez R, Altucci L, de Lera ÁR. Synthesis and Biological Characterization of the Histone Deacetylase Inhibitor Largazole and C7- Modified Analogues. J Med Chem 2010; 53:4654-67. [DOI: 10.1021/jm100244y] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José A. Souto
- Departamento de Química Orgánica, Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Esther Vaz
- Departamento de Química Orgánica, Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Ilaria Lepore
- Dipartimento di Patologia Generale, Seconda Università degli Studi di Napoli, Vico L. de Crecchio 7, 80138 Napoli, Italy
| | - Ann-Christin Pöppler
- Departamento de Química Orgánica, Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Gianluigi Franci
- Dipartimento di Patologia Generale, Seconda Università degli Studi di Napoli, Vico L. de Crecchio 7, 80138 Napoli, Italy
- IGB-CNR, via Pietro Castellino, Napoli, Italy
| | - Rosana Álvarez
- Departamento de Química Orgánica, Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Lucia Altucci
- Dipartimento di Patologia Generale, Seconda Università degli Studi di Napoli, Vico L. de Crecchio 7, 80138 Napoli, Italy
- IGB-CNR, via Pietro Castellino, Napoli, Italy
| | - Ángel R. de Lera
- Departamento de Química Orgánica, Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
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