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Firdaus S, Boye S, Janke A, Friedel P, Janaszewska A, Appelhans D, Müller M, Klajnert-Maculewicz B, Voit B, Lederer A. Advancing Antiamyloidogenic Activity by Fine-Tuning Macromolecular Topology. Biomacromolecules 2023; 24:5797-5806. [PMID: 37939018 DOI: 10.1021/acs.biomac.3c00817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Amyloid β peptide can aggregate into thin β-sheet fibrils or plaques deposited on the extracellular matrix, which is the hallmark of Alzheimer's disease. Multifunctional macromolecular structures play an important role in inhibiting the aggregate formation of amyloidogenic materials and thus are promising candidates with antiamyloidogenic characteristics for the development of next-generation therapeutics. In this study, we evaluate how small differences in the dendritic topology of these structures influence their antiamyloidogenic activity by the comparison of "perfectly dendritic" and "pseudodendritic" macromolecules, both decorated with mannose units. Their compactness, the position of surface units, and the size of glyco-architectures influence their antiamyloidogenic activity against Aβ 40, a major component of amyloid plaques. For the advanced analysis of the aggregation of the Aβ peptide, we introduce asymmetric flow field flow fractionation as a suitable method for the quantification of large and delicate structures. This alternative method focuses on the quantification of complex aggregates of Aβ 40 and glycodendrimer/glyco-pseudodendrimer over different time intervals of incubation, showing a good correlation to ThT assay and CD spectroscopy results. Kinetic studies of the second-generation glyco-pseudodendrimer revealed maximum inhibition of Aβ 40 aggregates, verified with atomic force microscopy. The second-generation glyco-pseudodendrimer shows the best antiamyloidogenic properties confirming that macromolecular conformation in combination with optimal functional group distribution is the key to its performance. These molecular properties were validated and confirmed by molecular dynamics simulation.
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Affiliation(s)
- Shamila Firdaus
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - Susanne Boye
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - Andreas Janke
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - Peter Friedel
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - Anna Janaszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 90-136 Łódź, Poland
| | - Dietmar Appelhans
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - Martin Müller
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Barbara Klajnert-Maculewicz
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 90-136 Łódź, Poland
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Albena Lederer
- Leibniz-Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Department Chemistry and Polymer Science, Stellenbosch University, 7602 Matieland, South Africa
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2
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Lezov A, Gubarev A, Kaiser T, Tobaschus W, Tsvetkov N, Nischang I, Schubert US, Frey H, Perevyazko I. “Hard” Sphere Behavior of “Soft”, Globular-like, Hyperbranched Polyglycerols – Extensive Molecular Hydrodynamic and Light Scattering Studies. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexey Lezov
- Department of Molecular Biophysics and Polymer Physics, Saint Petersburg State University, 199034, Universitetskaya nab. 7/9, Saint-Petersburg, Russia
| | - Alexander Gubarev
- Department of Molecular Biophysics and Polymer Physics, Saint Petersburg State University, 199034, Universitetskaya nab. 7/9, Saint-Petersburg, Russia
| | - Tobias Kaiser
- Institute of Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Willi Tobaschus
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Nikolai Tsvetkov
- Department of Molecular Biophysics and Polymer Physics, Saint Petersburg State University, 199034, Universitetskaya nab. 7/9, Saint-Petersburg, Russia
| | - Ivo Nischang
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 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, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Holger Frey
- Institute of Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Igor Perevyazko
- Department of Molecular Biophysics and Polymer Physics, Saint Petersburg State University, 199034, Universitetskaya nab. 7/9, Saint-Petersburg, Russia
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3
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Unraveling Multiple Distributions in Chain Walking Polyethylene Using Advanced Liquid Chromatography. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00314] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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4
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Dockhorn R, Plüschke L, Geisler M, Zessin J, Lindner P, Mundil R, Merna J, Sommer JU, Lederer A. Polyolefins Formed by Chain Walking Catalysis-A Matter of Branching Density Only? J Am Chem Soc 2019; 141:15586-15596. [PMID: 31438682 DOI: 10.1021/jacs.9b06785] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recently developed chain walking (CW) catalysis is an elegant approach to produce materials with controllable structure and properties. However, there is still a lack in understanding of how the reaction mechanism influences the macromolecular structures. In this study, a series of dendritic polyethylenes (PE) synthesized by Pd-α-diimine-complex through CW catalysis (CWPE) is investigated by means of theory and experiment. Thereby, the exceptional ability of in situ tailoring polymer structure by varying synthesis parameters was exploited to tune the branching architecture, which allowed us to establish a precise relationship between synthesis, structure, and solution properties. The systematically produced polymers were characterized by state-of-the-art multidetector separation and neutron scattering experiments as well as atomic force microscopy to access molecular properties of CWPE. On a global scale, the CWPE appear in a worm-like conformation independently on the synthesis conditions. However, severe differences in their contraction factors suggested that CWPE differ substantially in topology. These observations were verified by NMR studies that showed that CWPE possess a constant total number of branches but varying branching distribution. Small angle neutron scattering experiments gave access to structural characteristics from global to segmental scale and revealed the unique heterogeneity of CWPE, which is predominantly based on differences in their dendritic side chains. The experimental data were compared to theoretical CW structures modeled with different reaction-to-walking probabilities. Simple theoretical arguments predict a crossover from dendritic to linear topologies yielding a structural range from purely linear to dendritic chain growth. Yet, comparison of theoretical and empirical scattering curves gave the first evidence that a transition state to worm-like topologies is actually experimentally accessible. This crossover regime is characterized by linear global features and dendritic local substructures contrary to randomly hyperbranched systems. Instead, the obtained CWPE systems have characteristics of disordered dendritic bottle brushes and can be adjusted by the walking rate/reaction probability of the catalyst.
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Affiliation(s)
- Ron Dockhorn
- Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6 , 01069 Dresden , Germany
| | - Laura Plüschke
- Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6 , 01069 Dresden , Germany.,Technische Universität Dresden , 01062 Dresden , Germany
| | - Martin Geisler
- Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6 , 01069 Dresden , Germany.,Technische Universität Dresden , 01062 Dresden , Germany
| | - Johanna Zessin
- Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6 , 01069 Dresden , Germany.,Technische Universität Dresden , 01062 Dresden , Germany
| | - Peter Lindner
- Institut Laue-Langevin (ILL) , 71 Avenue des Martyrs , 38000 Grenoble , France
| | - Robert Mundil
- University of Chemistry and Technology Prague , Technická 5 , 16628 Prague 6 , Czech Republic
| | - Jan Merna
- University of Chemistry and Technology Prague , Technická 5 , 16628 Prague 6 , Czech Republic
| | - Jens-Uwe Sommer
- Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6 , 01069 Dresden , Germany.,Technische Universität Dresden , 01062 Dresden , Germany
| | - Albena Lederer
- Leibniz Institute of Polymer Research Dresden , Hohe Strasse 6 , 01069 Dresden , Germany.,Technische Universität Dresden , 01062 Dresden , Germany
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5
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Ahn J, Chang T, Wang X, Limpouchová Z, Procházka K. Influence of the Chain Architecture and the Presence of End-Groups or Branching Units Chemically Different from Repeating Structural Units on the Critical Adsorption Point in Liquid Chromatography. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01786] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Junyoung Ahn
- Division of Advanced Materials
Science and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea
| | - Taihyun Chang
- Division of Advanced Materials
Science and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea
| | - Xiu Wang
- Department of Physical and
Macromolecular Chemistry, Charles University, Prague, Czech Republic
| | - Zuzana Limpouchová
- Department of Physical and
Macromolecular Chemistry, Charles University, Prague, Czech Republic
| | - Karel Procházka
- Department of Physical and
Macromolecular Chemistry, Charles University, Prague, Czech Republic
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6
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Near-infrared luminescent erbium complexes with 8-hydroxyquinoline-terminated hyperbranched polyester. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.02.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Schubert C, Osterwinter C, Tonhauser C, Schömer M, Wilms D, Frey H, Friedrich C. Can Hyperbranched Polymers Entangle? Effect of Hydrogen Bonding on Entanglement Transition and Thermorheological Properties of Hyperbranched Polyglycerol Melts. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00674] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Christian Schubert
- Freiburg
Materials Research Center (FMF), and Institute of Macromolecular Chemistry, University of Freiburg, Freiburg, Germany
- Institute
of Organic Chemistry, Organic and Macromolecular Chemistry, University of Mainz, Mainz, Germany
| | - Carina Osterwinter
- Freiburg
Materials Research Center (FMF), and Institute of Macromolecular Chemistry, University of Freiburg, Freiburg, Germany
| | - Christoph Tonhauser
- Institute
of Organic Chemistry, Organic and Macromolecular Chemistry, University of Mainz, Mainz, Germany
| | - Martina Schömer
- Institute
of Organic Chemistry, Organic and Macromolecular Chemistry, University of Mainz, Mainz, Germany
| | - Daniel Wilms
- Institute
of Organic Chemistry, Organic and Macromolecular Chemistry, University of Mainz, Mainz, Germany
| | - Holger Frey
- Institute
of Organic Chemistry, Organic and Macromolecular Chemistry, University of Mainz, Mainz, Germany
| | - Christian Friedrich
- Freiburg
Materials Research Center (FMF), and Institute of Macromolecular Chemistry, University of Freiburg, Freiburg, Germany
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8
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Amirova AI, Golub OV, Migulin DA, Muzafarov AM. Solution properties of new “core-shell” structured polyorganosilsesquioxanes with two different types of “core-shell” surroundings. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2016. [DOI: 10.1080/1023666x.2016.1136867] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Seiwert J, Leibig D, Kemmer-Jonas U, Bauer M, Perevyazko I, Preis J, Frey H. Hyperbranched Polyols via Copolymerization of 1,2-Butylene Oxide and Glycidol: Comparison of Batch Synthesis and Slow Monomer Addition. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02402] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jan Seiwert
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Daniel Leibig
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
- Graduate
School
Materials Science in Mainz, Staudinger
Weg 9, 55128 Mainz, Germany
| | - Ulrike Kemmer-Jonas
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Marius Bauer
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Igor Perevyazko
- Department
of Molecular Biophysics and Polymer Physics, St. Petersburg State University, Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russia
| | - Jasmin Preis
- PSS Polymer Standards
Service GmbH, In der Dalheimer Wiese
5, 55120 Mainz, Germany
| | - Holger Frey
- Institute
of Organic Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
- Graduate
School
Materials Science in Mainz, Staudinger
Weg 9, 55128 Mainz, Germany
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10
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Mesias R, Murillo EA. Hyperbranched polyester polyol modified with polylactic acid. J Appl Polym Sci 2014. [DOI: 10.1002/app.41589] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ricardo Mesias
- Grupo de Investigación GIPIMME; Universidad de Antioquia; Calle 67, 53-108 Medellín Colombia
| | - Edwin A. Murillo
- Grupo de Investigación en Materiales Poliméricos (GIMAPOL), Departamento de Química; Universidad Francisco de Paula Santander; Avenida Gran Colombia No. 12E-96 Barrio Colsag San José de Cúcuta Colombia
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11
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Filippov AP, Zamyshlyaeva OG, Tarabukina EB, Simonova MA, Kozlov AV, Semchikov YD. Structural and conformational properties of hyperbranched copolymers based on perfluorinated germanium hydrides. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x12050033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Lederer A, Hartmann T, Komber H. Sphere-Like Fourth Generation Pseudo-Dendrimers with a Hyperbranched Core. Macromol Rapid Commun 2012; 33:1440-4. [DOI: 10.1002/marc.201200223] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 04/26/2012] [Indexed: 11/07/2022]
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13
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Jia X, Chao D, He L, Liu H, Zheng T, Zhang C, Wang C. Hyperbranched electroactive azo polyamide based on oligoaniline: Synthesis, characterization, and dielectric properties. Macromol Res 2011. [DOI: 10.1007/s13233-011-1114-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Boye S, Scharfenberg L, Lederer A. Separation of linear and star-shaped polystyrenes by phase distribution chromatography. J Sep Sci 2010; 33:3584-94. [DOI: 10.1002/jssc.201000499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 08/31/2010] [Accepted: 09/01/2010] [Indexed: 11/09/2022]
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Abstract
In this paper, properties of the commercially available Boltorn?
hydroxy-functional aliphatic hyperbranched polyesters of the second, third
and fourth pseudo generation, were investigated. Beside that, samples of the
third and fourth pseudo generation were fractionated using the precipitation
fractionation method to obtain three fractions of each sample, which were
also investigated in this paper. According to the results obtained by GPC
analysis, molar mass and polydispersity of the investigated Boltorn?
hyperbranched polyesters increased with increase of the pseudo generation
number. Value of the limiting viscosity number of the investigated samples,
determined using the viscosity measurements of dilute solutions of these
polymers in N-methyl-2-pyrrolidone, increased with increase of the pseudo
generation number. On the other side, value of the limiting viscosity number
of the fractions decreased from the first up to the third fraction. The same
trend was also observed for the values of the hydrodynamic diameter of parent
samples and their fractions, determined by dynamic light scattering using
N-methyl-2-pyrrolidone as solvent. The thermal properties of the investigated
Boltorn? hyperbranched polyesters were determined by thermogravimetry in
nitrogen atmosphere and it has been shown that thermal stability of these
samples increased with increase of the pseudo generation number. End hydroxyl
groups of the second and third pseudo generation samples were modified with
?-alanine to obtain hyperbranched samples soluble in water. That was fully
accomplished only for the Boltorn? hyperbranched polyester of the second
pseudo generation. On the other side, modified sample of the third pseudo
generation was possible to dissolve in water only after adding small amount
of the NaOH.
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