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Abodja O, Touati N, Morel M, Rudiuk S, Baigl D. ATP/azobenzene-guanidinium self-assembly into fluorescent and multi-stimuli-responsive supramolecular aggregates. Commun Chem 2024; 7:142. [PMID: 38918507 PMCID: PMC11199595 DOI: 10.1038/s42004-024-01226-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 06/17/2024] [Indexed: 06/27/2024] Open
Abstract
Building stimuli-responsive supramolecular systems is a way for chemists to achieve spatio-temporal control over complex systems as well as a promising strategy for applications ranging from sensing to drug-delivery. For its large spectrum of biological and biomedical implications, adenosine 5'-triphosphate (ATP) is a particularly interesting target for such a purpose but photoresponsive ATP-based systems have mainly been relying on covalent modification of ATP. Here, we show that simply mixing ATP with AzoDiGua, an azobenzene-guanidium compound with photodependent nucleotide binding affinity, results in the spontaneous self-assembly of the two non-fluorescent compounds into photoreversible, micrometer-sized and fluorescent aggregates. Obtained in water at room temperature and physiological pH, these supramolecular structures are dynamic and respond to several chemical, physical and biological stimuli. The presence of azobenzene allows a fast and photoreversible control of their assembly. ATP chelating properties to metal dications enable ion-triggered disassembly and fluorescence control with valence-selectivity. Finally, the supramolecular aggregates are disassembled by alkaline phosphatase in a few minutes at room temperature, resulting in enzymatic control of fluorescence. These results highlight the interest of using a photoswitchable nucleotide binding partner as a self-assembly brick to build highly responsive supramolecular entities involving biological targets without the need to covalently modify them.
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Affiliation(s)
- Olivier Abodja
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Nadia Touati
- Chimie ParisTech, Université PSL, CNRS, Institut de Recherche de Chimie-Paris, PCMTH, 75005, Paris, France
| | - Mathieu Morel
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Sergii Rudiuk
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Damien Baigl
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France.
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2
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Kasyanenko N, Baryshev A, Artamonova D, Sokolov P. Packaging of DNA Integrated with Metal Nanoparticles in Solution. ENTROPY (BASEL, SWITZERLAND) 2023; 25:1052. [PMID: 37509999 PMCID: PMC10378076 DOI: 10.3390/e25071052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023]
Abstract
The transformation of high-molecular DNA from a random swollen coil in a solution to a discrete nanosized particle with the ordered packaging of a rigid and highly charged double-stranded molecule is one of the amazing phenomena of polymer physics. DNA condensation is a well-known phenomenon in biological systems, yet its molecular mechanism is not clear. Understanding the processes occurring in vivo is necessary for the usage of DNA in the fabrication of new biologically significant nanostructures. Entropy plays a very important role in DNA condensation. DNA conjugates with metal nanoparticles are useful in various fields of nanotechnology. In particular, they can serve as a basis for creating multicomponent nanoplatforms for theranostics. DNA must be in a compact state in such constructions. In this paper, we tested the methods of DNA integration with silver, gold and palladium nanoparticles and analyzed the properties of DNA conjugates with metal nanoparticles using the methods of atomic force microscopy, spectroscopy, viscometry and dynamic light scattering. DNA size, stability and rigidity (persistence length), as well as plasmon resonance peaks in the absorption spectra of systems were studied. The methods for DNA condensation with metal nanoparticles were analyzed.
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Affiliation(s)
- Nina Kasyanenko
- Faculty of Physics, Saint Petersburg State University, Saint Petersburg 199034, Russia
| | - Andrei Baryshev
- Faculty of Physics, Saint Petersburg State University, Saint Petersburg 199034, Russia
| | - Daria Artamonova
- Faculty of Physics, Saint Petersburg State University, Saint Petersburg 199034, Russia
| | - Petr Sokolov
- Faculty of Physics, Saint Petersburg State University, Saint Petersburg 199034, Russia
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3
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Kasyanenko NA, Silanteva IA, Gabrusenok PV, Santer S, Komolkin AV. Electrostatic Interactions in the Formation of DNA Complexes with Cis- and Trans-Isomers of Azobenzene-Containing Surfactants in Solutions with Di- and Trivalent Metal Ions. ACS OMEGA 2023; 8:14597-14609. [PMID: 37125131 PMCID: PMC10134229 DOI: 10.1021/acsomega.3c00419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/04/2023] [Indexed: 05/03/2023]
Abstract
The effect of the presence of divalent and trivalent metal ions in solutions upon DNA packaging induced by the photosensitive azobenzene-containing surfactant is considered. It has been shown that the addition of divalent and trivalent metal ions does not affect the DNA-surfactant interaction for both the cis- and the trans-isomers of the surfactant. At the same time, the ionic strength of the solution, which is provided by a certain concentration of the salt, has a huge impact. It affects the association of surfactant molecules with each other and their binding to DNA. It has been shown by computer simulation that cobalt hexamine is attracted to the N7 atom of guanine in the major groove of DNA and does not penetrate into grooves near the AT base pairs.
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Affiliation(s)
- Nina A. Kasyanenko
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya embankment, Saint Petersburg, 199034, Russia
| | - Irina A. Silanteva
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya embankment, Saint Petersburg, 199034, Russia
| | - Pavel V. Gabrusenok
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya embankment, Saint Petersburg, 199034, Russia
| | - Svetlana Santer
- Experimental
Physics, Institute of Physics and Astronomy, University of Potsdam, Potsdam-Golm 14476, Germany
| | - Andrei V. Komolkin
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya embankment, Saint Petersburg, 199034, Russia
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4
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Reifarth M, Bekir M, Bapolisi AM, Titov E, Nußhardt F, Nowaczyk J, Grigoriev D, Sharma A, Saalfrank P, Santer S, Hartlieb M, Böker A. A Dual pH‐ and Light‐Responsive Spiropyran‐Based Surfactant: Investigations on Its Switching Behavior and Remote Control over Emulsion Stability. Angew Chem Int Ed Engl 2022; 61:e202114687. [PMID: 35178847 PMCID: PMC9400902 DOI: 10.1002/anie.202114687] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Indexed: 11/10/2022]
Abstract
A cationic surfactant containing a spiropyran unit is prepared exhibiting a dual‐responsive adjustability of its surface‐active characteristics. The switching mechanism of the system relies on the reversible conversion of the non‐ionic spiropyran (SP) to a zwitterionic merocyanine (MC) and can be controlled by adjusting the pH value and via light, resulting in a pH‐dependent photoactivity: While the compound possesses a pronounced difference in surface activity between both forms under acidic conditions, this behavior is suppressed at a neutral pH level. The underlying switching processes are investigated in detail, and a thermodynamic explanation based on a combination of theoretical and experimental results is provided. This complex stimuli‐responsive behavior enables remote‐control of colloidal systems. To demonstrate its applicability, the surfactant is utilized for the pH‐dependent manipulation of oil‐in‐water emulsions.
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Affiliation(s)
- Martin Reifarth
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 14476 Potsdam Germany
| | - Marek Bekir
- University of Potsdam Institute of Physics and Astronomy Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Alain M. Bapolisi
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Evgenii Titov
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Fabian Nußhardt
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 14476 Potsdam Germany
| | - Julius Nowaczyk
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 14476 Potsdam Germany
| | - Dmitry Grigoriev
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 14476 Potsdam Germany
| | - Anjali Sharma
- University of Potsdam Institute of Physics and Astronomy Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Peter Saalfrank
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Svetlana Santer
- University of Potsdam Institute of Physics and Astronomy Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
| | - Matthias Hartlieb
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 14476 Potsdam Germany
| | - Alexander Böker
- University of Potsdam Institute of Chemistry Karl-Liebknecht-Straße 24–25 14476 Potsdam Germany
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 14476 Potsdam Germany
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5
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Reifarth M, Bekir M, Bapolisi AM, Titov E, Nußhardt F, Nowaczyk J, Grigoriev D, Sharma A, Saalfrank P, Santer S, Hartlieb M, Böker A. A Dual pH and Light‐Responsive Spiropyrane‐Based Surfactant: Investigations on its Switching Behavior and Remote Control over Emulsion Stability. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin Reifarth
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Marek Bekir
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Alain M. Bapolisi
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Evgenii Titov
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Fabian Nußhardt
- Fraunhofer Institute for Applied Polymer Research: Fraunhofer-Institut fur Angewandte Polymerforschung IAP Life Sciences and Bioprocesses GERMANY
| | - Julius Nowaczyk
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Dmitry Grigoriev
- Fraunhofer Institute for Applied Polymer Research: Fraunhofer-Institut fur Angewandte Polymerforschung IAP Life Sciences and Bioprocesses GERMANY
| | - Anjali Sharma
- University of Potsdam: Universitat Potsdam Institut für Physik GERMANY
| | - Peter Saalfrank
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Svetlana Santer
- University of Potsdam: Universitat Potsdam Institut für Physik GERMANY
| | - Matthias Hartlieb
- University of Potsdam: Universitat Potsdam Institut für Chemie GERMANY
| | - Alexander Böker
- Universität Potsdam: Universitat Potsdam Lehrstuhl für Polymermaterialien und Polymertechnologienlächen Geiselbergstrasse 69 D-14476 Potsdam GERMANY
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6
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Silanteva IA, Komolkin AV, Mamontova VV, Gabrusenok PV, Vorontsov-Velyaminov PN, Santer S, Kasyanenko NA. Cis-Isomers of Photosensitive Cationic Azobenzene Surfactants in DNA Solutions at Different NaCl Concentrations: Experiment and Modeling. J Phys Chem B 2021; 125:11197-11207. [PMID: 34586822 DOI: 10.1021/acs.jpcb.1c07864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The DNA interaction with cis-isomers of photosensitive azobenzene-containing surfactants was studied by both experimental methods and computer simulation. It was shown that before the organization of micelles, such surfactants in the cis-conformation form associates of only a single type with a disordered orientation of molecules. In contrast, for trans-isomers, there exist two types of associates with head-to-head or head-to-tail orientations of molecules in dependence on salt concentration in a solution. The comparison of cis- and trans-isomer binding to DNA and the influence of salt concentration on the formation of their complexes with DNA were studied. It was shown that cis-isomers interact with phosphate groups of DNA and that their molecules were also located along the minor groove of DNA.
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Affiliation(s)
- Irina A Silanteva
- Faculty of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Andrei V Komolkin
- Faculty of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Veronika V Mamontova
- Faculty of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Pavel V Gabrusenok
- Faculty of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Pavel N Vorontsov-Velyaminov
- Faculty of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany
| | - Nina A Kasyanenko
- Faculty of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
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7
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Silanteva IA, Komolkin AV, Mamontova VV, Vorontsov-Velyaminov PN, Santer S, Kasyanenko NA. Some Features of Surfactant Organization in DNA Solutions at Various NaCl Concentrations. ACS OMEGA 2020; 5:18234-18243. [PMID: 32743199 PMCID: PMC7391854 DOI: 10.1021/acsomega.0c01850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/30/2020] [Indexed: 05/17/2023]
Abstract
The photosensitive azobenzene-containing surfactant C4-Azo-OC6TMAB is a promising agent for reversible DNA packaging in a solution. The simulation of the trans-isomer surfactant organization into associates in a solution with and without salt as well as its binding to DNA at different NaCl concentrations was carried out by molecular dynamics. Experimental data obtained by spectral and hydrodynamic methods were used to verify the results of simulation. It was shown that head-to-tail aggregates with close to antiparallel orientation of surfactant molecules were formed at certain NaCl and surfactant concentrations (below critical micelle concentration). Such aggregates have two positively charged ends, and therefore, they can be attracted to negatively charged DNA phosphates far located along the chain, as well as those that belong to different molecules. This contributes to the formation of intermolecular DNA-DNA contacts, and this way, the experimentally observed precipitation of DNA can be explained.
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Affiliation(s)
- Irina A. Silanteva
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Andrei V. Komolkin
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | - Veronika V. Mamontova
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
| | | | - Svetlana Santer
- Experimental
Physics, Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany
| | - Nina A. Kasyanenko
- Faculty
of Physics, Saint Petersburg University, 7-9 Universitetskaya Embankment, Saint Petersburg 199034, Russia
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8
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Arya P, Feldmann D, Kopyshev A, Lomadze N, Santer S. Light driven guided and self-organized motion of mesoporous colloidal particles. SOFT MATTER 2020; 16:1148-1155. [PMID: 31830185 DOI: 10.1039/c9sm02068c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report on guided and self-organized motion of ensembles of mesoporous colloidal particles that can undergo dynamic aggregation or separation upon exposure to light. The forces on particles involve the phenomenon of light-driven diffusioosmosis (LDDO) and are hydrodynamic in nature. They can be made to act passively on the ensemble as a whole but also used to establish a mutual interaction between particles. The latter scenario requires a porous colloid morphology such that the particle can act as a source or sink of a photosensitive surfactant, which drives the LDDO process. The interplay between the two modes of operation leads to fascinating possibilities of dynamical organization and manipulation of colloidal ensembles adsorbed at solid-liquid interfaces. While the passive mode can be thought of to allow for a coarse structuring of a cloud of colloids, the inter-particle mode may be used to impose a fine structure on a 2D particle grid. Local flow is used to impose and tailor interparticle interactions allowing for much larger interaction distances that can be achieved with, e.g., DLVO type of forces, and is much more versatile.
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Affiliation(s)
- Pooja Arya
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany.
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9
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Martin N, Tian L, Spencer D, Coutable-Pennarun A, Anderson JLR, Mann S. Photoswitchable Phase Separation and Oligonucleotide Trafficking in DNA Coacervate Microdroplets. Angew Chem Int Ed Engl 2019; 58:14594-14598. [PMID: 31408263 DOI: 10.1002/anie.201909228] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 01/01/2023]
Abstract
Coacervate microdroplets produced by liquid-liquid phase separation have been used as synthetic protocells that mimic the dynamical organization of membrane-free organelles in living systems. Achieving spatiotemporal control over droplet condensation and disassembly remains challenging. Herein, we describe the formation and photoswitchable behavior of light-responsive coacervate droplets prepared from mixtures of double-stranded DNA and an azobenzene cation. The droplets disassemble and reassemble under UV and blue light, respectively, due to azobenzene trans/cis photoisomerisation. Sequestration and release of captured oligonucleotides follow the dynamics of phase separation such that light-activated transfer, mixing, hybridization, and trafficking of the oligonucleotides can be controlled in binary populations of the droplets. Our results open perspectives for the spatiotemporal control of DNA coacervates and provide a step towards the dynamic regulation of synthetic protocells.
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Affiliation(s)
- Nicolas Martin
- Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR5031, 115 Avenue du Dr. Albert Schweitzer, 33600, Pessac, France.,Centre for Protolife Research and Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK
| | - Liangfei Tian
- Centre for Protolife Research and Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK.,BrisSynBio Synthetic Biology Research Centre, Life Sciences Building, University of Bristol, Tyndall Avenue, Bristol, BS8 1TQ, UK
| | - Dan Spencer
- Centre for Protolife Research and Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK
| | - Angélique Coutable-Pennarun
- BrisSynBio Synthetic Biology Research Centre, Life Sciences Building, University of Bristol, Tyndall Avenue, Bristol, BS8 1TQ, UK.,School of Biochemistry, University of Bristol, University Walk, Bristol, BS8 1TD, UK
| | - J L Ross Anderson
- BrisSynBio Synthetic Biology Research Centre, Life Sciences Building, University of Bristol, Tyndall Avenue, Bristol, BS8 1TQ, UK.,School of Biochemistry, University of Bristol, University Walk, Bristol, BS8 1TD, UK
| | - Stephen Mann
- Centre for Protolife Research and Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK.,BrisSynBio Synthetic Biology Research Centre, Life Sciences Building, University of Bristol, Tyndall Avenue, Bristol, BS8 1TQ, UK
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10
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Martin N, Tian L, Spencer D, Coutable‐Pennarun A, Anderson JLR, Mann S. Photoswitchable Phase Separation and Oligonucleotide Trafficking in DNA Coacervate Microdroplets. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909228] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nicolas Martin
- Univ. Bordeaux CNRS Centre de Recherche Paul Pascal, UMR5031 115 Avenue du Dr. Albert Schweitzer 33600 Pessac France
- Centre for Protolife Research and Centre for Organized Matter Chemistry School of Chemistry University of Bristol Bristol BS8 1TS UK
| | - Liangfei Tian
- Centre for Protolife Research and Centre for Organized Matter Chemistry School of Chemistry University of Bristol Bristol BS8 1TS UK
- BrisSynBio Synthetic Biology Research Centre, Life Sciences Building University of Bristol Tyndall Avenue Bristol BS8 1TQ UK
| | - Dan Spencer
- Centre for Protolife Research and Centre for Organized Matter Chemistry School of Chemistry University of Bristol Bristol BS8 1TS UK
| | - Angélique Coutable‐Pennarun
- BrisSynBio Synthetic Biology Research Centre, Life Sciences Building University of Bristol Tyndall Avenue Bristol BS8 1TQ UK
- School of Biochemistry University of Bristol University Walk Bristol BS8 1TD UK
| | - J. L. Ross Anderson
- BrisSynBio Synthetic Biology Research Centre, Life Sciences Building University of Bristol Tyndall Avenue Bristol BS8 1TQ UK
- School of Biochemistry University of Bristol University Walk Bristol BS8 1TD UK
| | - Stephen Mann
- Centre for Protolife Research and Centre for Organized Matter Chemistry School of Chemistry University of Bristol Bristol BS8 1TS UK
- BrisSynBio Synthetic Biology Research Centre, Life Sciences Building University of Bristol Tyndall Avenue Bristol BS8 1TQ UK
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11
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Schimka S, Klier DT, de Guereñu AL, Bastian P, Lomadze N, Kumke MU, Santer S. Photo-isomerization of azobenzene containing surfactants induced by near-infrared light using upconversion nanoparticles as mediator. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:125201. [PMID: 30625434 DOI: 10.1088/1361-648x/aafcfa] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Here we report on photo-isomerization of azobenzene containing surfactants induced during irradiation with near-infrared (NIR) light in the presence of upconversion nanoparticles (UCNPs) acting as mediator. The surfactant molecule consists of charged head group and hydrophobic tail with azobenzene group incorporated in alkyl chain. The azobenzene group can be reversible photo-isomerized between two states: trans- and cis- by irradiation with light of an appropriate wavelength. The trans-cis photo-isomerization is induced by UV light, while cis-trans isomerization proceeds either thermally in darkness, or can be accelerated by exposure to illumination with a longer wavelength typically in a blue/green range. We present the application of lanthanide doped UCNPs to successfully switch azobenzene containing surfactants from cis to trans conformation in bulk solution using NIR light. Using Tm3+ or Er3+ as activator ions, the UCNPs provide emissions in the spectral range of 450 nm < λ em < 480 nm (for Tm3+, three and four photon induced emission) or 525 nm < λ em < 545 nm (for Er3+, two photon induced emission), respectively. Especially for UCNPs containing Tm3+ a good overlap of the emissions with the absorption bands of the azobenzene is present. Under illumination of the surfactant solution with NIR light (λ ex = 976 nm) in the presence of the Tm3+-doped UCNPs, the relaxation time of cis-trans photo-isomerization was increased by almost 13 times compared to thermally induced isomerization. The influence of thermal heating due to the irradiation using NIR light was shown to be minor for solvents not absorbing in NIR spectral range (e.g. CHCl3) in contrast to water, which shows a distinct absorption in the NIR.
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Affiliation(s)
- Selina Schimka
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
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12
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Blayo C, Houston JE, King SM, Evans RC. Unlocking Structure-Self-Assembly Relationships in Cationic Azobenzene Photosurfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10123-10134. [PMID: 30071720 DOI: 10.1021/acs.langmuir.8b02109] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Azobenzene photosurfactants are light-responsive amphiphiles that have garnered significant attention for diverse applications including delivery and sorting systems, phase transfer catalysis, and foam drainage. The azobenzene chromophore changes both its polarity and conformation (trans-cis isomerization) in response to UV light, while the amphiphilic structure drives self-assembly. Detailed understanding of the inherent relationship between the molecular structure, physicochemical behavior, and micellar arrangement of azobenzene photosurfactants is critical to their usefulness. Here, we investigate the key structure-function-assembly relationships in the popular cationic alkylazobenzene trimethylammonium bromide (AzoTAB) family of photosurfactants. We show that subtle changes in the surfactant structure (alkyl tail, spacer length) can lead to large variations in the critical micelle concentration, particularly in response to light, as determined by surface tensiometry and dynamic light scattering. Small-angle neutron scattering studies also reveal the formation of more diverse micellar aggregate structures (ellipsoids, cylinders, spheres) than predicted based on simple packing parameters. The results suggest that whereas the azobenzene core resides in the effective hydrophobic segment in the trans-isomer, it forms part of the effective hydrophilic segment in the cis-isomer because of the dramatic conformational and polarity changes induced by photoisomerization. The extent of this shift in the hydrophobic-hydrophilic balance is determined by the separation between the azobenzene core and the polar head group in the molecular structure. Our findings show that judicious design of the AzoTAB structure enables selective tailoring of the surfactant properties in response to light, such that they can be exploited and controlled in a reliable fashion.
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Affiliation(s)
- Camille Blayo
- School of Chemistry and CRANN , University of Dublin, Trinity College , College Green , Dublin 2 , Ireland
| | - Judith E Houston
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ) , Forschungszentrum Jülich GmbH , Lichtenbergstr. 1 , 85748 Garching , Germany
| | - Stephen M King
- ISIS Pulsed Neutron Source, STFC, Rutherford Appleton Laboratory , Didcot , Oxfordshire OX11 0QX , U.K
| | - Rachel C Evans
- Department of Materials Science & Metallurgy , University of Cambridge , Cambridge CB3 0FS , U.K
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13
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Tankovskaia SA, Kotb OM, Dommes OA, Paston SV. Application of spectral methods for studying DNA damage induced by gamma-radiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 200:85-92. [PMID: 29674243 DOI: 10.1016/j.saa.2018.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 04/05/2018] [Accepted: 04/06/2018] [Indexed: 06/08/2023]
Abstract
Spectral methods can provide a variety of possibilities to determine several types of radiation-induced DNA damage, such as nucleobase destruction and local denaturation. DNA UV absorption and CD spectra measured at room temperature undergo noticeable alteration under the action of γ-radiation. We have applied the Spirin method of total nucleobases determination, and have measured the molar extinction coefficient of DNA and DNA CD spectra for solutions with different NaCl concentrations (3mM-3.2M) and containing MgCl2, exposed to γ-radiation with the doses of 0-103Gy. The melting temperatures of DNA in irradiated solutions at the doses of 0-50Gy were obtained with the help of spectrophotometric melting. It was found that the amount of destructed nucleobases and radiation-induced loss of DNA helicity significantly decreases with the rise of the ionic strength of the irradiated solution. Substitution of a portion of Na+ ions on Mg2+ while keeping the total ionic strength constant (μ=5mM) does not affect the considered radiation effects. The role of the structure and composition of the DNA secondary hydration layer in the radiation-induced damages is discussed.
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Affiliation(s)
- Svetlana A Tankovskaia
- Department of Molecular Biophysics and Polymer Physics, Faculty of Physics, Saint-Petersburg State University, Ulyanovskaya, 3, St. Petersburg 198504, Russia
| | - Omar M Kotb
- Department of Molecular Biophysics and Polymer Physics, Faculty of Physics, Saint-Petersburg State University, Ulyanovskaya, 3, St. Petersburg 198504, Russia; Department of Physics, Faculty of Science, Zagazig University, Sharkia Gov, Zagazig 44519, Egypt
| | - Olga A Dommes
- Institute of Macromolecular Compounds, Bolshoy pr. 31, 199004 Saint-Petersburg, Russia
| | - Sofia V Paston
- Department of Molecular Biophysics and Polymer Physics, Faculty of Physics, Saint-Petersburg State University, Ulyanovskaya, 3, St. Petersburg 198504, Russia.
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Kasyanenko N, Unksov I, Bakulev V, Santer S. DNA Interaction with Head-to-Tail Associates of Cationic Surfactants Prevents Formation of Compact Particles. Molecules 2018; 23:E1576. [PMID: 29958479 PMCID: PMC6100511 DOI: 10.3390/molecules23071576] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/26/2018] [Accepted: 06/26/2018] [Indexed: 12/11/2022] Open
Abstract
Cationic azobenzene-containing surfactants are capable of condensing DNA in solution with formation of nanosized particles that can be employed in gene delivery. The ratio of surfactant/DNA concentration and solution ionic strength determines the result of DNA-surfactant interaction: Complexes with a micelle-like surfactant associates on DNA, which induces DNA shrinkage, DNA precipitation or DNA condensation with the emergence of nanosized particles. UV and fluorescence spectroscopy, low gradient viscometry and flow birefringence methods were employed to investigate DNA-surfactant and surfactant-surfactant interaction at different NaCl concentrations, [NaCl]. It was observed that [NaCl] (or the Debye screening radius) determines the surfactant-surfactant interaction in solutions without DNA. Monomers, micelles and non-micellar associates of azobenzene-containing surfactants with head-to-tail orientation of molecules were distinguished due to the features of their absorption spectra. The novel data enabled us to conclude that exactly the type of associates (together with the concentration of components) determines the result of DNA-surfactant interaction. Predomination of head-to-tail associates at 0.01 M < [NaCl] < 0.5 M induces DNA aggregation and in some cases DNA precipitation. High NaCl concentration (higher than 0.8 M) prevents electrostatic attraction of surfactants to DNA phosphates for complex formation. DAPI dye luminescence in solutions with DNA-surfactant complexes shows that surfactant tails overlap the DNA minor groove. The addition of di- and trivalent metal ions before and after the surfactant binding to DNA indicate that the bound surfactant molecules are located on DNA in islets.
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Affiliation(s)
- Nina Kasyanenko
- Department of Physics, Saint Petersburg State University, 199034 St Petersburg, Russia.
| | - Ivan Unksov
- Department of Physics, Saint Petersburg State University, 199034 St Petersburg, Russia.
| | - Vladimir Bakulev
- Department of Physics, Saint Petersburg State University, 199034 St Petersburg, Russia.
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany.
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15
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Lubbe AS, Szymanski W, Feringa BL. Recent developments in reversible photoregulation of oligonucleotide structure and function. Chem Soc Rev 2018; 46:1052-1079. [PMID: 28128377 DOI: 10.1039/c6cs00461j] [Citation(s) in RCA: 209] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
There is a growing interest in the photoregulation of biological functions, due to the high level of spatiotemporal precision achievable with light. Additionally, light is non-invasive and waste-free. In particular, the photoregulation of oligonucleotide structure and function is a rapidly developing study field with relevance to biological, physical and material sciences. Molecular photoswitches have been incorporated in oligonucleotides for 20 years, and the field has currently grown beyond fundamental studies on photochemistry of the switches and DNA duplex stability, and is moving towards applications in chemical biology, nanotechnology and material science. Moreover, the currently emerging field of photopharmacology indicates the relevance of photocontrol in future medicine. In recent years, a large number of publications has appeared on photoregulation of DNA and RNA structure and function. New strategies are evaluated and novel, exciting applications are shown. In this comprehensive review, the key strategies for photoswitch inclusion in oligonucleotides are presented and illustrated with recent examples. Additionally the applications that have emerged in recent years are discussed, including gene regulation, drug delivery and materials design. Finally, we identify the challenges that the field currently faces and look forward to future applications.
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Affiliation(s)
- Anouk S Lubbe
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
| | - Wiktor Szymanski
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands. and Department of Radiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
| | - Ben L Feringa
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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16
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Unksov IN, Kasyanenko NA. Conformational changes in the DNA molecule in solution caused by the binding of a light-sensitive cationic surfactant. J STRUCT CHEM+ 2017. [DOI: 10.1134/s0022476617020287] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Malyar IV, Titov E, Lomadze N, Saalfrank P, Santer S. Photoswitching of azobenzene-containing self-assembled monolayers as a tool for control over silicon surface electronic properties. J Chem Phys 2017; 146:104703. [DOI: 10.1063/1.4978225] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ivan V. Malyar
- Department of Nano- and Biomedical Technologies, Saratov State University, Astrakhanskaya 83, 410012 Saratov, Russia
| | - Evgenii Titov
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
- Theoretical Chemistry, Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Nino Lomadze
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Peter Saalfrank
- Theoretical Chemistry, Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
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18
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Schimka S, Lomadze N, Rabe M, Kopyshev A, Lehmann M, von Klitzing R, Rumyantsev AM, Kramarenko EY, Santer S. Photosensitive microgels containing azobenzene surfactants of different charges. Phys Chem Chem Phys 2017; 19:108-117. [DOI: 10.1039/c6cp04555c] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We report on light sensitive microgel particles that can change their volume reversibly in response to illumination with light of different wavelengths.
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Affiliation(s)
- Selina Schimka
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Nino Lomadze
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Maren Rabe
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Alexey Kopyshev
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Maren Lehmann
- Institute of Chemistry
- Technical University Berlin
- 10623 Berlin
- Germany
| | | | | | | | - Svetlana Santer
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
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19
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Lyadinskaya VV, Lin SY, Michailov AV, Povolotskiy AV, Noskov BA. Phase Transitions in DNA/Surfactant Adsorption Layers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13435-13445. [PMID: 27993018 DOI: 10.1021/acs.langmuir.6b03396] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The adsorption layers of complexes between DNA and oppositely charged surfactants dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) at the solution/air interface were studied with surface tensiometry, dilational surface rheology, atomic force microscopy, Brewster angle microscopy, infrared absorption-reflection spectroscopy, and ellipsometry. Measurements of the kinetic dependencies of the surface properties gave a possibility to discover the time intervals corresponding to the coexistence of two-dimensional phases. One can assume that the observed phase transition is of the first order, unlike the formation of microaggregates in the adsorption layers of mixed solutions of synthetic polyelectrolytes and surfactants. The multitechniques approach together with the calculations of the adsorption kinetics allowed the elucidation of the structure of coexisting surface phases and the distinguishing of four main steps of adsorption layer formation at the surface of DNA/surfactant solutions.
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Affiliation(s)
- Vanda V Lyadinskaya
- National Taiwan University of Science and Technology , Chemical Engineering Department, 43 Keelung Road, Section 4, 106 Taipei, Taiwan
| | - Shi-Yow Lin
- National Taiwan University of Science and Technology , Chemical Engineering Department, 43 Keelung Road, Section 4, 106 Taipei, Taiwan
| | - Alexander V Michailov
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Alexey V Povolotskiy
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Boris A Noskov
- Institute of Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
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20
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Feldmann D, Maduar SR, Santer M, Lomadze N, Vinogradova OI, Santer S. Manipulation of small particles at solid liquid interface: light driven diffusioosmosis. Sci Rep 2016; 6:36443. [PMID: 27808170 PMCID: PMC5093767 DOI: 10.1038/srep36443] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 10/14/2016] [Indexed: 12/11/2022] Open
Abstract
The strong adhesion of sub-micron sized particles to surfaces is a nuisance, both for removing contaminating colloids from surfaces and for conscious manipulation of particles to create and test novel micro/nano-scale assemblies. The obvious idea of using detergents to ease these processes suffers from a lack of control: the action of any conventional surface-modifying agent is immediate and global. With photosensitive azobenzene containing surfactants we overcome these limitations. Such photo-soaps contain optical switches (azobenzene molecules), which upon illumination with light of appropriate wavelength undergo reversible trans-cis photo-isomerization resulting in a subsequent change of the physico-chemical molecular properties. In this work we show that when a spatial gradient in the composition of trans- and cis- isomers is created near a solid-liquid interface, a substantial hydrodynamic flow can be initiated, the spatial extent of which can be set, e.g., by the shape of a laser spot. We propose the concept of light induced diffusioosmosis driving the flow, which can remove, gather or pattern a particle assembly at a solid-liquid interface. In other words, in addition to providing a soap we implement selectivity: particles are mobilized and moved at the time of illumination, and only across the illuminated area.
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Affiliation(s)
- David Feldmann
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
| | - Salim R Maduar
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, 119071 Moscow, Russia.,Department of Physics, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Mark Santer
- Max Planck Institute of Colloids and Interfaces, 14424 Potsdam, Germany
| | - Nino Lomadze
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
| | - Olga I Vinogradova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, 119071 Moscow, Russia.,Department of Physics, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia.,DWI-Leibniz Institute for Interactive Materials, RWTH Aachen, Forckenbeckstraße 50, 52056 Aachen, Germany
| | - Svetlana Santer
- Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
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21
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22
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Kopyshev A, Galvin CJ, Patil RR, Genzer J, Lomadze N, Feldmann D, Zakrevski J, Santer S. Light-Induced Reversible Change of Roughness and Thickness of Photosensitive Polymer Brushes. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19175-19184. [PMID: 27351592 DOI: 10.1021/acsami.6b06881] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We investigate light-induced changes in thickness and roughness of photosensitive polymer brushes containing azobenzene cationic surfactants by atomic force microscopy (AFM) in real time during light irradiation. Because the cis-state of azobenzene unit requires more free volume than its trans counterpart, the UV light-induced expansion of polymer thin films associated with the trans-to-cis isomerism of azobenzene groups is expected to occur. This phenomenon is well documented in physisorbed polymer films containing azobenzene groups. In contrast, photosensitive polymer brushes show a decrease in thickness under UV irradiation. We have found that the azobenzene surfactants in their trans-state form aggregates within the brush. Under irradiation, the surfactants undergo photoisomerization to the cis-state, which is more hydrophilic. As a consequence, the aggregates within the brush are disrupted, and the polymer brush contracts. When subsequently irradiated with blue light the polymer brush thickness returns back to its initial value. This behavior is related to isomerization of the surfactant to the more hydrophobic trans-state and subsequent formation of surfactant aggregates within the polymer brush. The photomechanical function of the dry polymer brush, i.e., contraction and expansion, was found to be reversible with repeated irradiation cycles and requires only a few seconds for switching. In addition to the thickness change, the roughness of the brush also changes reversibly between a few Angstroms (blue light) and several nanometers (UV light). Photosensitive polymer brushes represent smart films with light responsive thickness and roughness that could be used for generating dynamic fluctuating surfaces, the function of which can be turned on and off in a controllable manner on a nanometer length scale.
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Affiliation(s)
- Alexey Kopyshev
- Institute of Physics and Astronomy, University of Potsdam , 14476 Potsdam, Germany
| | - Casey J Galvin
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
| | - Rohan R Patil
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
| | - Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
| | - Nino Lomadze
- Institute of Physics and Astronomy, University of Potsdam , 14476 Potsdam, Germany
| | - David Feldmann
- Institute of Physics and Astronomy, University of Potsdam , 14476 Potsdam, Germany
| | - Juri Zakrevski
- Institute of Physics and Astronomy, University of Potsdam , 14476 Potsdam, Germany
| | - Svetlana Santer
- Institute of Physics and Astronomy, University of Potsdam , 14476 Potsdam, Germany
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23
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Kasyanenko N, Lysyakova L, Ramazanov R, Nesterenko A, Yaroshevich I, Titov E, Alexeev G, Lezov A, Unksov I. Conformational and phase transitions in DNA--photosensitive surfactant solutions: Experiment and modeling. Biopolymers 2016; 103:109-22. [PMID: 25302479 DOI: 10.1002/bip.22575] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 10/07/2014] [Accepted: 10/07/2014] [Indexed: 01/17/2023]
Abstract
DNA binding to trans- and cis-isomers of azobenzene containing cationic surfactant in 5 mM NaCl solution was investigated by the methods of dynamic light scattering (DLS), low-gradient viscometry (LGV), atomic force microscopy (AFM), circular dichroism (CD), gel electrophoresis (GE), flow birefringence (FB), UV-Vis spectrophotometry. Light-responsive conformational transitions of DNA in complex with photosensitive surfactant, changes in DNA optical anisotropy and persistent length, phase transition of DNA into nanoparticles induced by high surfactant concentration, as well as transformation of surfactant conformation under its binding to macromolecule were studied. Computer simulations of micelles formation for cis- and trans-isomers of azobenzene containing surfactant, as well as DNA-surfactant interaction, were carried out. Phase diagram for DNA-surfactant solutions was designed. The possibility to reverse the DNA packaging induced by surfactant binding with the dilution and light irradiation was shown.
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Affiliation(s)
- N Kasyanenko
- Faculty of Physics, Department of Molecular Biophysics, Saint Petersburg State University, Petrodvorets, Ulyanovskaya str. 1, 198504, St. Petersburg, Russia
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24
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Schimka S, Santer S, Mujkić-Ninnemann NM, Bléger D, Hartmann L, Wehle M, Lipowsky R, Santer M. Photosensitive Peptidomimetic for Light-Controlled, Reversible DNA Compaction. Biomacromolecules 2016; 17:1959-68. [DOI: 10.1021/acs.biomac.6b00052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Selina Schimka
- Institute
of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
- Max Planck Institute
of Colloids and Interfaces, 14424 Potsdam, Germany
| | - Svetlana Santer
- Institute
of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
| | | | - David Bléger
- Humboldt-Universität
zu Berlin, 12489 Berlin, Germany
| | - Laura Hartmann
- Max Planck Institute
of Colloids and Interfaces, 14424 Potsdam, Germany
| | - Marko Wehle
- Theory
and Bio-Systems Group, Max Planck Institute of Colloids and Interfaces, 14424 Potsdam, Germany
| | - Reinhard Lipowsky
- Theory
and Bio-Systems Group, Max Planck Institute of Colloids and Interfaces, 14424 Potsdam, Germany
| | - Mark Santer
- Theory
and Bio-Systems Group, Max Planck Institute of Colloids and Interfaces, 14424 Potsdam, Germany
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26
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Zakrevskyy Y, Titov E, Lomadze N, Santer S. Phase diagrams of DNA-photosensitive surfactant complexes: effect of ionic strength and surfactant structure. J Chem Phys 2015; 141:164904. [PMID: 25362338 DOI: 10.1063/1.4899281] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Realization of all-optically controlled and efficient DNA compaction is the major motivation in the study of interactions between DNA and photosensitive surfactants. In this article, using recently published approach of phase diagram construction [Y. Zakrevskyy, P. Cywinski, M. Cywinska, J. Paasche, N. Lomadze, O. Reich, H.-G. Löhmannsroben, and S. Santer, J. Chem. Phys. 140, 044907 (2014)], a strategy for substantial reduction of compaction agent concentration and simultaneous maintaining the light-induced decompaction efficiency is proposed. The role of ionic strength (NaCl concentration), as a very important environmental parameter, and surfactant structure (spacer length) on the changes of positions of phase transitions is investigated. Increase of ionic strength leads to increase of the surfactant concentration needed to compact DNA molecule. However, elongation of the spacer results to substantial reduction of this concentration. DNA compaction by surfactants with longer tails starts to take place in diluted solutions at charge ratios Z < 1 and is driven by azobenzene-aggregation compaction mechanism, which is responsible for efficient decompaction. Comparison of phase diagrams for different DNA-photosensitive surfactant systems allowed explanation and proposal of a strategy to overcome previously reported limitations of the light-induced decompaction for complexes with increasing surfactant hydrophobicity.
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Affiliation(s)
- Yuriy Zakrevskyy
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Evgenii Titov
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Nino Lomadze
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
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Zakrevskyy Y, Roxlau J, Brezesinski G, Lomadze N, Santer S. Photosensitive surfactants: micellization and interaction with DNA. J Chem Phys 2015; 140:044906. [PMID: 25669582 DOI: 10.1063/1.4862678] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Recently, photosensitive surfactants have re-attracted considerable attention. It has been shown that their association with oppositely charged biologically important polyelectrolytes, such as DNA or microgels, can be efficiently manipulated simply by light exposure. In this article, we investigate the self-assembly of photosensitive surfactants as well as their interactions with DNA by calorimetric and spectroscopic methods. Critical micelle concentration (CMC), standard micellization enthalpy, entropy, and Gibbs energy were determined in different conditions (ionic strengths and temperatures) for a series of cationic surfactants with an azobenzene group in their tail. It is shown, that aggregation forces of photosensitive units play an important role in the micellization giving the major contribution to the micellization enthalpy. The onset of the aggregation can be traced from shift of the absorption peak position in the UV-visible spectrum. Titration UV-visible spectroscopy is used as an alternative, simple, and sensitive approach to estimate CMC. The titration UV-visible spectroscopy was also employed to investigate interactions (CAC: critical aggregation concentration, precipitation, and colloidal stabilization) in the DNA-surfactant complex.
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Affiliation(s)
- Yuriy Zakrevskyy
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Julian Roxlau
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Gerald Brezesinski
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces, Research Campus Potsdam-Golm, D-14476 Potsdam, Germany
| | - Nino Lomadze
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
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28
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Richter M, Zakrevskyy Y, Eisele M, Lomadze N, Santer S, Klitzing RV. Effect of pH, co-monomer content, and surfactant structure on the swelling behavior of microgel-azobenzene-containing surfactant complex. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Venancio-Marques A, Bergen A, Rossi-Gendron C, Rudiuk S, Baigl D. Photosensitive polyamines for high-performance photocontrol of DNA higher-order structure. ACS NANO 2014; 8:3654-3663. [PMID: 24580129 DOI: 10.1021/nn500266b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polyamines are small, ubiquitous, positively charged molecules that play an essential role in numerous biological processes such as DNA packaging, gene regulation, neuron activity, and cell proliferation. Here, we synthesize the first series of photosensitive polyamines (PPAs) and demonstrate their ability to photoreversibly control nanoscale DNA higher-order structure with high efficiency. We show with fluorescence microscopy imaging that the efficiency of the PPAs as DNA-compacting agents is directly correlated to their molecular charge. Micromolar concentration of the most efficient molecule described here, a PPA containing three charges at neutral pH, compacts DNA molecules from a few kilobase pairs to a few hundred kilobase pairs, while subsequent 3 min UV illuminations at 365 nm triggers complete unfolding of DNA molecules. Additional application of blue light (440 nm for 3 min) induces the refolding of DNA into the compact state. Atomic force microscopy reveals that the compaction involves a global folding of the whole DNA molecule, whereas UV-induced unfolding is a modification initiated from the periphery of the compacted DNA, resulting in the occurrence of intermediate flower-like structures prior to the fully unfolded state.
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Affiliation(s)
- Anna Venancio-Marques
- Ecole Normale Supérieure-PSL Research University , Department of Chemistry, 24 Rue Lhomond, F-75005, Paris, France
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Zakrevskyy Y, Cywinski P, Cywinska M, Paasche J, Lomadze N, Reich O, Löhmannsröben HG, Santer S. Interaction of photosensitive surfactant with DNA and poly acrylic acid. J Chem Phys 2014; 140:044907. [DOI: 10.1063/1.4862679] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Interaction between DNA and trimethyl-ammonium bromides with different alkyl chain lengths. ScientificWorldJournal 2014; 2014:863049. [PMID: 24574926 PMCID: PMC3915499 DOI: 10.1155/2014/863049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 10/29/2013] [Indexed: 11/17/2022] Open
Abstract
The interaction between λ--DNA and cationic surfactants with varying alkyl chain lengths was investigated. By dynamic light scattering method, the trimethyl-ammonium bromides-DNA complex formation was shown to be dependent on the length of the surfactant's alkyl chain. For surfactants with sufficient long alkyl chain (CTAB, TTAB, DTAB), the compacted particles exist with a size of ~60-110 nm at low surfactant concentrations. In contrast, high concentration of surfactants leads to aggregates with increased sizes. Atomic force microscope scanning also supports the above observation. Zeta potential measurements show that the potential of the particles decreases with the increase of surfactant concentration (CTAB, TTAB, DTAB), which contributes much to the coagulation of the particles. For OTAB, the surfactant with the shortest chain in this study, it cannot fully neutralize the charges of DNA molecules; consequently, the complex is looser than other surfactant-DNA structures.
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Kopyshev A, Galvin CJ, Genzer J, Lomadze N, Santer S. Opto-mechanical scission of polymer chains in photosensitive diblock-copolymer brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13967-13974. [PMID: 24131361 DOI: 10.1021/la403241t] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper we report on an opto-mechanical scission of polymer chains within photosensitive diblock-copolymer brushes grafted to flat solid substrates. We employ surface-initiated polymerization of methylmethacrylate (MMA) and t-butyl methacrylate (tBMA) to grow diblock-copolymer brushes of poly(methylmethacrylate-b-t-butyl methacrylate) following the atom transfer polymerization (ATRP) scheme. After the synthesis, deprotection of the PtBMA block yields poly(methacrylic acid) (PMAA). To render PMMA-b-PMAA copolymers photosensitive, cationic azobenzene containing surfactants are attached to the negatively charged outer PMAA block. During irradiation with an ultraviolet (UV) interference pattern, the extent of photoisomerization of the azobenzene groups varies spatially and results in a topography change of the brush, i.e., formation of surface relief gratings (SRG). The SRG formation is accompanied by local rupturing of the polymer chains in areas from which the polymer material recedes. This opto-mechanically induced scission of the polymer chains takes place at the interfaces of the two blocks and depends strongly on the UV irradiation intensity. Our results indicate that this process may be explained by employing classical continuum fracture mechanics, which might be important for tailoring the phenomenon for applying it to poststructuring of polymer brushes.
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Affiliation(s)
- Alexey Kopyshev
- Institute of Physics and Astronomy, University of Potsdam , 14476 Potsdam, Germany
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