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Ragaller F, Andronico L, Sykora J, Kulig W, Rog T, Urem YB, Abhinav, Danylchuk DI, Hof M, Klymchenko A, Amaro M, Vattulainen I, Sezgin E. Dissecting the mechanisms of environment sensitivity of smart probes for quantitative assessment of membrane properties. Open Biol 2022; 12:220175. [PMID: 36099931 PMCID: PMC9470265 DOI: 10.1098/rsob.220175] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The plasma membrane, as a highly complex cell organelle, serves as a crucial platform for a multitude of cellular processes. Its collective biophysical properties are largely determined by the structural diversity of the different lipid species it accommodates. Therefore, a detailed investigation of biophysical properties of the plasma membrane is of utmost importance for a comprehensive understanding of biological processes occurring therein. During the past two decades, several environment-sensitive probes have been developed and become popular tools to investigate membrane properties. Although these probes are assumed to report on membrane order in similar ways, their individual mechanisms remain to be elucidated. In this study, using model membrane systems, we characterized the probes Pro12A, NR12S and NR12A in depth and examined their sensitivity to parameters with potential biological implications, such as the degree of lipid saturation, double bond position and configuration (cis versus trans), phospholipid headgroup and cholesterol content. Applying spectral imaging together with atomistic molecular dynamics simulations and time-dependent fluorescent shift analyses, we unravelled individual sensitivities of these probes to different biophysical properties, their distinct localizations and specific relaxation processes in membranes. Overall, Pro12A, NR12S and NR12A serve together as a toolbox with a wide range of applications allowing to select the most appropriate probe for each specific research question.
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Affiliation(s)
- Franziska Ragaller
- Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, 17165 Solna, Sweden
| | - Luca Andronico
- Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, 17165 Solna, Sweden
| | - Jan Sykora
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Waldemar Kulig
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Tomasz Rog
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Yagmur Balim Urem
- Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, 17165 Solna, Sweden
| | - Abhinav
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Dmytro I Danylchuk
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch, France
| | - Martin Hof
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Andrey Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch, France
| | - Mariana Amaro
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Ilpo Vattulainen
- Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - Erdinc Sezgin
- Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, 17165 Solna, Sweden
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2
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Khalin I, Adarsh N, Schifferer M, Wehn A, Groschup B, Misgeld T, Klymchenko A, Plesnila N. Size-Selective Transfer of Lipid Nanoparticle-Based Drug Carriers Across the Blood Brain Barrier Via Vascular Occlusions Following Traumatic Brain Injury. Small 2022; 18:e2200302. [PMID: 35384294 DOI: 10.1002/smll.202200302] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/10/2022] [Indexed: 06/14/2023]
Abstract
The current lack of understanding about how nanocarriers cross the blood-brain barrier (BBB) in the healthy and injured brain is hindering the clinical translation of nanoscale brain-targeted drug-delivery systems. Here, the bio-distribution of lipid nano-emulsion droplets (LNDs) of two sizes (30 and 80 nm) in the mouse brain after traumatic brain injury (TBI) is investigated. The highly fluorescent LNDs are prepared by loading them with octadecyl rhodamine B and a bulky hydrophobic counter-ion, tetraphenylborate. Using in vivo two-photon and confocal imaging, the circulation kinetics and bio-distribution of LNDs in the healthy and injured mouse brain are studied. It is found that after TBI, LNDs of both sizes accumulate at vascular occlusions, where specifically 30 nm LNDs extravasate into the brain parenchyma and reach neurons. The vascular occlusions are not associated with bleedings, but instead are surrounded by processes of activated microglia, suggesting a specific opening of the BBB. Finally, correlative light-electron microscopy reveals 30 nm LNDs in endothelial vesicles, while 80 nm particles remain in the vessel lumen, indicating size-selective vesicular transport across the BBB via vascular occlusions. The data suggest that microvascular occlusions serve as "gates" for the transport of nanocarriers across the BBB.
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Affiliation(s)
- Igor Khalin
- Institute for Stroke and Dementia Research, University of Munich Medical Center, 81377, Munich, Germany
- Cluster for Systems Neurology, Munich, Germany
| | - Nagappanpillai Adarsh
- Laboratory de Biophotonique et Pharmacologie, University of Strasbourg, Strasbourg, 67401, France
- Department of Polymer Chemistry, Government College Attingal, Kerala, 695101, India
| | - Martina Schifferer
- Cluster for Systems Neurology, Munich, Germany
- German Center for Neurodegenerative Diseases, 81377, Munich, Germany
| | - Antonia Wehn
- Institute for Stroke and Dementia Research, University of Munich Medical Center, 81377, Munich, Germany
| | - Bernhard Groschup
- Institute for Stroke and Dementia Research, University of Munich Medical Center, 81377, Munich, Germany
| | - Thomas Misgeld
- Cluster for Systems Neurology, Munich, Germany
- German Center for Neurodegenerative Diseases, 81377, Munich, Germany
- Institute of Neuronal Cell Biology, School of Medicine, Technical University of Munich, 80802, Munich, Germany
| | - Andrey Klymchenko
- Laboratory de Biophotonique et Pharmacologie, University of Strasbourg, Strasbourg, 67401, France
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research, University of Munich Medical Center, 81377, Munich, Germany
- Cluster for Systems Neurology, Munich, Germany
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3
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Fanciullo G, Conti I, Didier P, Klymchenko A, Léonard J, Garavelli M, Rivalta I. Modelling quenching mechanisms of disordered molecular systems in the presence of molecular aggregates. Phys Chem Chem Phys 2022; 24:1787-1794. [PMID: 34985481 DOI: 10.1039/d1cp04260b] [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: 11/21/2022]
Abstract
Exciton density dynamics recorded in time-resolved spectroscopic measurements is a useful tool to recover information on energy transfer (ET) processes that can occur at different timescales, up to the ultrafast regime. Macroscopic models of exciton density decays, involving both direct Förster-like ET and diffusion mechanisms for exciton-exciton annihilation, are largely used to fit time-resolved experimental data but generally neglect contributions from molecular aggregates that can work as quenching species. In this work, we introduce a macroscopic model that includes contributions from molecular aggregate quenchers in a disordered molecular system. As an exemplifying case, we considered a homogenous distribution of rhodamine B dyes embedded in organic nanoparticles to set the initial parameters of the proposed model. The influence of such model parameters is systematically analysed, showing that the presence of molecular aggregate quenchers can be monitored by evaluating the exciton density long time decays. We showed that the proposed model can be applied to molecular systems with ultrafast decays, and we anticipated that it could be used in future studies for global fitting of experimental data with potential support from first-principles simulations.
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Affiliation(s)
- Giacomo Fanciullo
- Dipartimento di Chimica Industriale "Toso Montanari", ALMA MATER STUDIORUM, Università di Bologna, Viale del Risorgimento 4, 40126 Bologna, Italy.
| | - Irene Conti
- Dipartimento di Chimica Industriale "Toso Montanari", ALMA MATER STUDIORUM, Università di Bologna, Viale del Risorgimento 4, 40126 Bologna, Italy.
| | - Pascal Didier
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch, France
| | - Andrey Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, 74 Route du Rhin, 67401 Illkirch, France
| | - Jérémie Léonard
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France
| | - Marco Garavelli
- Dipartimento di Chimica Industriale "Toso Montanari", ALMA MATER STUDIORUM, Università di Bologna, Viale del Risorgimento 4, 40126 Bologna, Italy.
| | - Ivan Rivalta
- Dipartimento di Chimica Industriale "Toso Montanari", ALMA MATER STUDIORUM, Università di Bologna, Viale del Risorgimento 4, 40126 Bologna, Italy. .,Université de Lyon, École Normale Supérieure de Lyon, Université Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, 46 Allée d'Italie, F69364 Lyon, France
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4
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Junqueira H, Schroder AP, Thalmann F, Klymchenko A, Mély Y, Baptista MS, Marques CM. Molecular organization in hydroperoxidized POPC bilayers. Biochim Biophys Acta Biomembr 2021; 1863:183659. [PMID: 34052197 DOI: 10.1016/j.bbamem.2021.183659] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 04/23/2021] [Accepted: 05/24/2021] [Indexed: 11/30/2022]
Abstract
Lipid hydroperoxides are the primary reaction products of lipid oxidation, a natural outcome of life under oxygen. While playing a major role in cell metabolism, the microscopic origins of the effects of lipid hydroperoxidation on biomembranes remain elusive. Here we probe the polar structure of partially to fully hydroperoxidized bilayers of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) by a combination of environment-sensitive fluorescent probes and coarse-grained Martini numerical simulations. We find that the inserted organic hydroperoxide group -OOH migrates preferentially to the surface for bilayers with small fractions of hydroperoxidized lipids, but populates also significantly the bilayer interior for larger fractions. Our findings suggest that by modifying the intimate polarity of biomembranes, lipid peroxidation will have a significant impact on the activity of transmembrane proteins and on the bio-medical efficiency of membrane active molecules such as cell-penetrating and antimicrobial peptides.
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Affiliation(s)
- Helena Junqueira
- Departamento de Física Aplicada, Instituto de Física, Universidade de São Paulo, CP 66318, 05314970 São Paulo, Brazil
| | - André P Schroder
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR22, F-67000 Strasbourg, France.
| | - Fabrice Thalmann
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR22, F-67000 Strasbourg, France
| | - Andrey Klymchenko
- Université de Strasbourg, Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de pharmacie, 74 route du Rhin, CS 60024, 67401 Illkirch Cedex, France
| | - Yves Mély
- Université de Strasbourg, Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de pharmacie, 74 route du Rhin, CS 60024, 67401 Illkirch Cedex, France
| | - Mauricio S Baptista
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, Brazil
| | - Carlos M Marques
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR22, F-67000 Strasbourg, France
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5
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Liu F, Niko Y, Bouchaala R, Mercier L, Lefebvre O, Andreiuk B, Vandamme T, Goetz JG, Anton N, Klymchenko A. Drug‐Sponge Lipid Nanocarrier for in Situ Cargo Loading and Release Using Dynamic Covalent Chemistry. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/anie.202014259] [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: 10/22/2022]
Affiliation(s)
- Fei Liu
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
- INSERM UMR 1260, Regenerative Nanomedicine (RNM), FMTS, CNRS 7199, CAMB Université de Strasbourg 67000 Strasbourg France
| | - Yosuke Niko
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
- Research and Education Faculty, Multidisciplinary Science Cluster Interdisciplinary Science Unit Kochi University 2-5-1, Akebono-cho, Kochi-shi Kochi 780-8520 Japan
| | - Redouane Bouchaala
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
| | - Luc Mercier
- Inserm U1109, Tumor Biomechanics, Fédération de Médecine Translationnelle de Strasbourg (FMTS) University of Strasbourg 67200 Strasbourg France
- Current address: Interdisciplinary Institute for Neuroscience University of Bordeaux, CNRS UMR 5297 33077 Bordeaux France
| | - Olivier Lefebvre
- Inserm U1109, Tumor Biomechanics, Fédération de Médecine Translationnelle de Strasbourg (FMTS) University of Strasbourg 67200 Strasbourg France
| | - Bohdan Andreiuk
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
| | - Thierry Vandamme
- INSERM UMR 1260, Regenerative Nanomedicine (RNM), FMTS, CNRS 7199, CAMB Université de Strasbourg 67000 Strasbourg France
| | - Jacky G. Goetz
- Inserm U1109, Tumor Biomechanics, Fédération de Médecine Translationnelle de Strasbourg (FMTS) University of Strasbourg 67200 Strasbourg France
| | - Nicolas Anton
- INSERM UMR 1260, Regenerative Nanomedicine (RNM), FMTS, CNRS 7199, CAMB Université de Strasbourg 67000 Strasbourg France
| | - Andrey Klymchenko
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
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6
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Rehman AU, Anton N, Bou S, Schild J, Messaddeq N, Vandamme T, Akram S, Klymchenko A, Collot M. Tunable functionalization of nano-emulsions using amphiphilic polymers. Soft Matter 2021; 17:1788-1795. [PMID: 33398307 DOI: 10.1039/d0sm01952f] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nano-emulsions are defined as stable oil droplets sizing below 300 nm. Their singular particularity lies in the loading capabilities of their oily core, much higher than other kinds of carrier. On the other hand, functionalizing the dynamic oil/water interface, to date, has remained a challenge. To ensure the best anchoring of the reactive functions onto the surface of the droplets, we have designed specific amphiphilic polymers (APs) based on poly(maleic anhydride-alt-1-octadecene), stabilizing the nano-emulsions instead of surfactants. Aliphatic C18 chains of the APs are anchored in the droplet core, while the hydrophilic parts of the APs are poly(ethylene glycol) (PEG) chains. In addition, PEG chains are terminated with reactive (i) azide functions in order to prove the concept of the droplet decoration with clickable rhodamine (Rh-DBCO, specifically synthesized for this study), or (ii) biotin functions to verify the potential droplet functionalization with fluorescent streptavidin (streptavidin-AF-488). This study describes AP synthesis, physico-chemical characterization of the functional droplets (electron microscopy), and finally fluorescence labeling and droplet decoration. To conclude, these APs constitute an interesting solution for the stable functionalization of nano-emulsion droplets, paving a new way for the applications of nano-emulsions in targeting drug delivery.
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Affiliation(s)
- Asad Ur Rehman
- Université de Strasbourg, CNRS, CAMB UMR 7199, F-67000 Strasbourg, France.
| | - Nicolas Anton
- Université de Strasbourg, CNRS, CAMB UMR 7199, F-67000 Strasbourg, France. and INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, Université de Strasbourg, F-67000 Strasbourg, France
| | - Sophie Bou
- Université de Strasbourg, CNRS, LPB 7021, F-67000 Strasbourg, France
| | - Jérémy Schild
- Université de Strasbourg, CNRS, LPB 7021, F-67000 Strasbourg, France
| | - Nadia Messaddeq
- Université de Strasbourg, IGBMC, Inserm U1258, CNRS UMR7104, F-67000 Strasbourg, France.
| | - Thierry Vandamme
- Université de Strasbourg, CNRS, CAMB UMR 7199, F-67000 Strasbourg, France. and INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, Université de Strasbourg, F-67000 Strasbourg, France
| | - Salman Akram
- Université de Strasbourg, CNRS, CAMB UMR 7199, F-67000 Strasbourg, France.
| | - Andrey Klymchenko
- Université de Strasbourg, CNRS, LPB 7021, F-67000 Strasbourg, France
| | - Mayeul Collot
- Université de Strasbourg, CNRS, LPB 7021, F-67000 Strasbourg, France
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7
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Liu F, Niko Y, Bouchaala R, Mercier L, Lefebvre O, Andreiuk B, Vandamme T, Goetz JG, Anton N, Klymchenko A. Drug‐Sponge Lipid Nanocarrier for in Situ Cargo Loading and Release Using Dynamic Covalent Chemistry. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Fei Liu
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
- INSERM UMR 1260, Regenerative Nanomedicine (RNM), FMTS, CNRS 7199, CAMB Université de Strasbourg 67000 Strasbourg France
| | - Yosuke Niko
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
- Research and Education Faculty, Multidisciplinary Science Cluster Interdisciplinary Science Unit Kochi University 2-5-1, Akebono-cho, Kochi-shi Kochi 780-8520 Japan
| | - Redouane Bouchaala
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
| | - Luc Mercier
- Inserm U1109, Tumor Biomechanics, Fédération de Médecine Translationnelle de Strasbourg (FMTS) University of Strasbourg 67200 Strasbourg France
- Current address: Interdisciplinary Institute for Neuroscience University of Bordeaux, CNRS UMR 5297 33077 Bordeaux France
| | - Olivier Lefebvre
- Inserm U1109, Tumor Biomechanics, Fédération de Médecine Translationnelle de Strasbourg (FMTS) University of Strasbourg 67200 Strasbourg France
| | - Bohdan Andreiuk
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
| | - Thierry Vandamme
- INSERM UMR 1260, Regenerative Nanomedicine (RNM), FMTS, CNRS 7199, CAMB Université de Strasbourg 67000 Strasbourg France
| | - Jacky G. Goetz
- Inserm U1109, Tumor Biomechanics, Fédération de Médecine Translationnelle de Strasbourg (FMTS) University of Strasbourg 67200 Strasbourg France
| | - Nicolas Anton
- INSERM UMR 1260, Regenerative Nanomedicine (RNM), FMTS, CNRS 7199, CAMB Université de Strasbourg 67000 Strasbourg France
| | - Andrey Klymchenko
- Université de Strasbourg Laboratoire de Bioimagerie et Pathologies UMR 7021 CNRS 74 route du Rhin 67401 Illkirch France
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8
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Egloff S, Runser A, Klymchenko A, Reisch A. Size-Dependent Electroporation of Dye-Loaded Polymer Nanoparticles for Efficient and Safe Intracellular Delivery. Small Methods 2021; 5:e2000947. [PMID: 34927896 DOI: 10.1002/smtd.202000947] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/13/2020] [Indexed: 06/14/2023]
Abstract
Efficient and safe delivery of nanoparticles (NPs) into the cytosol of living cells constitutes a major methodological challenge in bio-nanotechnology. Electroporation allows direct transfer of NPs into the cytosol by forming transient pores in the cell membrane, but it is criticized for invasiveness, and the applicable particle sizes are not well defined. Here, in order to establish principles for efficient delivery of NPs into the cytosol with minimal cytotoxicity, the influence of the size of NPs on their electroporation and intracellular behavior is investigated. For this study, fluorescent dye-loaded polymer NPs with core sizes between 10 and 40 nm are prepared. Optimizing the electroporation protocol allows minimizing contributions of endocytosis and to study directly the effect of NP size on electroporation. NPs of <20 nm hydrodynamic size are efficiently delivered into the cytosol, whereas this is not the case for NPs of >30 nm. Moreover, only particles of core size <15 nm diffuse freely throughout the cytosol. While electroporation at excessive electric fields induces cytotoxicity, the use of small NPs <20 nm allows efficient delivery at mild electroporation conditions. These results give clear methodological and design guidelines for the safe delivery of NPs for intracellular applications.
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Affiliation(s)
- Sylvie Egloff
- Université de Strasbourg, CNRS, Laboratoire de Bioimagerie et Pathologies UMR 7021, Strasbourg, F-67000, France
| | - Anne Runser
- Université de Strasbourg, CNRS, Laboratoire de Bioimagerie et Pathologies UMR 7021, Strasbourg, F-67000, France
| | - Andrey Klymchenko
- Université de Strasbourg, CNRS, Laboratoire de Bioimagerie et Pathologies UMR 7021, Strasbourg, F-67000, France
| | - Andreas Reisch
- Université de Strasbourg, CNRS, Laboratoire de Bioimagerie et Pathologies UMR 7021, Strasbourg, F-67000, France
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9
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Jana S, Xu X, Klymchenko A, Reisch A, Pons T. Microcavity-Enhanced Fluorescence Energy Transfer from Quantum Dot Excited Whispering Gallery Modes to Acceptor Dye Nanoparticles. ACS Nano 2021; 15:1445-1453. [PMID: 33378154 DOI: 10.1021/acsnano.0c08772] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Whispering gallery mode (WGM) microcavities are emerging as potential candidates in the field of biosensing applications, as their resonance wavelengths shift with changes in the refractive index in the region of their evanescent field. Their high-quality resonance modes and accessible surface functionalities make them promising for molecular assays, but their high sensitivity makes them inherently unstable. Here, we demonstrate that WGM resonances also strongly enhance fluorescence energy transfer between donors placed inside the microcavity and acceptors placed outside. We load colloidal quantum dots (QDs) into polymeric microspheres to provide WGMs that benefit from the QD optical features when used as energy-transfer donors. Spectroscopic analysis of the emission from the microcavities shows that the high quality of WGMs enables a very efficient energy transfer to dye-loaded polymer nanoparticle acceptors placed in their vicinity. Compared to Förster resonance energy transfer, WGM-enabled energy transfer (WGET) occurs over a much more extended volume, thanks to the delocalization of the mode over a typically 105 times larger surface and to the extension of the WGM electromagnetic field to larger distances (>100 nm vs a few nm) from the surface of the microcavity. The resulting sensing scheme combines the sensitivity of WGM spectroscopy with the specificity and simple detection schemes of fluorescence energy transfer, thus providing a potentially powerful class of biosensors.
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Affiliation(s)
- Subha Jana
- Laboratoire de Physique et d'Étude des matériaux (LPEM, UMR 8213), ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 75005 Paris, France
| | - Xiangzhen Xu
- Laboratoire de Physique et d'Étude des matériaux (LPEM, UMR 8213), ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 75005 Paris, France
| | - Andrey Klymchenko
- Université de Strasbourg, CNRS, Laboratoire de Bioimagerie et Pathologies UMR 7021, F-67000 Strasbourg, France
| | - Andreas Reisch
- Université de Strasbourg, CNRS, Laboratoire de Bioimagerie et Pathologies UMR 7021, F-67000 Strasbourg, France
| | - Thomas Pons
- Laboratoire de Physique et d'Étude des matériaux (LPEM, UMR 8213), ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 75005 Paris, France
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10
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Barberio M, Al-Taher M, Forgione A, Hoskere Ashoka A, Felli E, Agnus V, Marescaux J, Klymchenko A, Diana M. A novel method for near-infrared fluorescence imaging of the urethra during perineal and transanal surgery: demonstration in a cadaveric model. Colorectal Dis 2020; 22:1749-1753. [PMID: 32443182 DOI: 10.1111/codi.15156] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 05/04/2020] [Indexed: 12/13/2022]
Abstract
AIM Transanal total mesorectal excision is a promising novel sphincter-saving procedure for low rectal cancer. However, the transanal bottom-up dissection is associated with increased rates of iatrogenic urethral injuries. Near-infrared fluorescence (NIRF) imaging, given its deeper tissue penetration, has been explored in a limited number of studies for enhanced intra-operative urethral visualization. In this study, we explored the feasibility of a novel, ultrabright, biocompatible fluorescent polymer to coat urinary catheters for the purpose of intra-operative urethral visualization. METHODS In an ex vivo experiment, using a near-infrared laparoscope, the fluorescent signal of a coated catheter (near-infrared coating of equipment, NICE) was qualitatively and quantitatively compared to the signal of indocyanine green (ICG)/Instillagel® mixtures and ICG-filled catheters at several concentrations. Also, in three male human torsos, using fluorescent urinary catheters, NIRF-guided perineal dissections and a transanal total mesorectal excision were performed. Intra-operative NIRF-based urethral visualization was performed systematically. RESULTS During the qualitative and quantitative fluorescence signal assessment, NICE-coated catheters were clearly superior to the ICG-based solutions. In the cadaveric experiments, enhanced urethral visualization was possible even at early stages of dissection, when the organ was covered by several tissue layers. CONCLUSIONS NICE-coated catheters represent a promising potential to allow for NIRF-based intra-operative urethral visualization.
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Affiliation(s)
- M Barberio
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France
| | - M Al-Taher
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France
| | - A Forgione
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France
| | - A Hoskere Ashoka
- Laboratoire de Bio-imagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Strasbourg, France
| | - E Felli
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France.,Institute of Physiology, EA3072 Mitochondria Respiration and Oxidative Stress, University of Strasbourg, Strasbourg, France
| | - V Agnus
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France
| | - J Marescaux
- IRCAD, Research Institute against Digestive Cancer, Strasbourg, France
| | - A Klymchenko
- Laboratoire de Bio-imagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Strasbourg, France
| | - M Diana
- Institute of Physiology, EA3072 Mitochondria Respiration and Oxidative Stress, University of Strasbourg, Strasbourg, France.,IRCAD, Research Institute against Digestive Cancer, Strasbourg, France.,ICUBE Laboratory, Photonics Instrumentation for Health, Strasbourg, France
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11
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Wang X, Collot M, Omran Z, Vandamme TF, Klymchenko A, Anton N. Further insights into release mechanisms from nano-emulsions, assessed by a simple fluorescence-based method. J Colloid Interface Sci 2020; 578:768-778. [DOI: 10.1016/j.jcis.2020.06.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 06/04/2020] [Accepted: 06/07/2020] [Indexed: 10/24/2022]
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12
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Belcastro E, Rehman AU, Remila L, Anton N, Auger C, Lefebvre O, Cullot M, Klymchenko A, Goetz J, Vandamme T, Schini-Kerth V. Potential of fluorescent nano-carriers targeting VCAM-1 for early detection of senescent endothelial cells. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2020.03.052] [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: 11/26/2022]
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13
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Barberio M, Pizzicannella M, Spota A, Ashoka AH, Agnus V, Al Taher M, Jansen-Winkeln B, Gockel I, Marescaux J, Swanström L, Kong SH, Felli E, Klymchenko A, Diana M. Preoperative endoscopic marking of the gastrointestinal tract using fluorescence imaging: submucosal indocyanine green tattooing versus a novel fluorescent over-the-scope clip in a survival experimental study. Surg Endosc 2020; 35:5115-5123. [PMID: 32989536 PMCID: PMC8346416 DOI: 10.1007/s00464-020-07999-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/14/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Intraoperative localization of endoluminal lesions is can be difficult during laparoscopy. Preoperative endoscopic marking is therefore necessary. Current methods include submucosal tattooing using visible dyes, which in case of transmural injection can impair surgical dissection. Tattooing using indocyanine green (ICG) coupled to intraoperative near-infrared (NIR) laparoscopy has been described. ICG is only visible under NIR-light, therefore, it doesn't impair the surgical workflow under white light even if there is spillage. However, ICG tattoos have rapid diffusion and short longevity. We propose fluorescent over-the-scope clips (FOSC), using a novel biocompatible fluorescent paint, as durable lesion marking. METHODS In six pigs, gastric and colonic endoscopic tattoos using 0.05 mg/mL of ICG and markings using the fluorescent OSC were performed (T0). Simultaneously, NIR laparoscopy was executed. Follow-up laparoscopies were conducted at postoperative day (POD) 4-6 (T1) and POD 11-12 (T2). During laparoscopy, fluorescence intensity was assessed. In one human cadaver, FOSC was used to mark a site on the stomach and on the sigmoid colon, respectively. Intraoperative detection during NIR laparoscopy was assessed. RESULTS Gastric and colonic ICG tattooing and OSC markings were easily visible using NIR laparoscopy on T0. All FOSC were visible at T1 and T2 in both stomach and colon, whereas the ICG tattooing at T1 was only visible in the stomach of 2 animals and in the colon of 3 animals. At T2, tattoos were not visible in any animal. FOSC were still visible in both stomach and colon of the human cadaver at 10 days. CONCLUSION Endoscopic marking using FOSC can be an efficient and durable alternative to standard methods.
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Affiliation(s)
- Manuel Barberio
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France.
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany.
| | - Margherita Pizzicannella
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
| | - Andrea Spota
- IRCAD, Research Institute Against Digestive Cancer, Strasbourg, France
| | - Anila Hoskere Ashoka
- Laboratoire de Bio-Imagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Strasbourg, France
| | - Vincent Agnus
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
| | - Mahdi Al Taher
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
| | - Boris Jansen-Winkeln
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Jacques Marescaux
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
- IRCAD, Research Institute Against Digestive Cancer, Strasbourg, France
| | - Lee Swanström
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
| | - Seong-Ho Kong
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
- Department of Surgery, Seoul National University, Seoul, South Korea
| | - Eric Felli
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
| | - Andrey Klymchenko
- Laboratoire de Bio-Imagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Strasbourg, France
| | - Michele Diana
- IHU-Strasbourg, Institute of Image-Guided Surgery, 1, place de l'Hôpital, 67091, Strasbourg, France
- IRCAD, Research Institute Against Digestive Cancer, Strasbourg, France
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14
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Sot J, Esnal I, Monasterio BG, León-Irra R, Niko Y, Goñi FM, Klymchenko A, Alonso A. Phase-selective staining of model and cell membranes, lipid droplets and lipoproteins with fluorescent solvatochromic pyrene probes. Biochim Biophys Acta Biomembr 2020; 1863:183470. [PMID: 32898535 DOI: 10.1016/j.bbamem.2020.183470] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 10/23/2022]
Abstract
The push-pull solvatochromic pyrene derivatives PA and PK have been applied to the study of model membrane vesicles, cells and purified human serum lipoproteins, using both confocal fluorescence microscopy and fluorescence spectroscopy. These polarity-sensitive probes provide information similar to that obtained by Laurdan or Prodan, i.e. mainly lipid order in biomembranes, but they have the essential advantage of being excitable by a standard 405 nm laser light, bypassing the use of multiphoton excitation. In addition, they are brighter and much more photostable than those dimethylamino naphthalene derivatives. Our results with model membrane spectroscopy (multilamellar vesicles) and with microscopy (giant unilamellar vesicles) showed the capacity of PA and PK to report differently on liquid-disordered, liquid-ordered and gel phase bilayers. Moreover, a ratiometric parameter, the Red/Blue Intensity Ratio (RBIR) could be used for inter-domain, inter-vesicle and even inter-technique comparison, and the appropriate microscopy-spectroscopy conversion coefficients could be estimated. In studies at the cellular level, PA probe stained almost exclusively the plasma membrane of red blood cells, revealing its high degree of lipid order. Using Chinese Hamster Ovary cells PA was shown to be an excellent probe for the detection of cytoplasmic lipid droplets, superior to Nile Red in that PA provides simultaneously a detailed information of membrane order in the whole cell, in which the lipid droplets appear with a very good contrast. Moreover, spectrofluorometric data of PA-stained serum lipoproteins indicated an essentially identical value of RBIR for lipid droplets and for high-density lipoproteins.
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Affiliation(s)
- Jesús Sot
- Instituto Biofisika (CSIC, UPV/EHU), Campus Universitario, 48940 Leioa, Spain
| | - Ixone Esnal
- Instituto Biofisika (CSIC, UPV/EHU), Campus Universitario, 48940 Leioa, Spain
| | - Bingen G Monasterio
- Instituto Biofisika (CSIC, UPV/EHU), Campus Universitario, 48940 Leioa, Spain
| | - Rocío León-Irra
- Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, CP 83000 Hermosillo, Sonora, Mexico
| | - Yosuke Niko
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, Kochi 780-8520, Japan
| | - Félix M Goñi
- Instituto Biofisika (CSIC, UPV/EHU), Campus Universitario, 48940 Leioa, Spain; Departamento de Bioquímica, Universidad del País Vasco, B. Sarriena, 48940 Leioa, Spain
| | - Andrey Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 67401 Illkirch, France
| | - Alicia Alonso
- Instituto Biofisika (CSIC, UPV/EHU), Campus Universitario, 48940 Leioa, Spain; Departamento de Bioquímica, Universidad del País Vasco, B. Sarriena, 48940 Leioa, Spain.
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15
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Petit C, Batool F, Stutz C, Anton N, Klymchenko A, Vandamme T, Benkirane-Jessel N, Huck O. Development of a thermosensitive statin loaded chitosan-based hydrogel promoting bone healing. Int J Pharm 2020; 586:119534. [PMID: 32531451 DOI: 10.1016/j.ijpharm.2020.119534] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 03/20/2020] [Revised: 06/05/2020] [Accepted: 06/06/2020] [Indexed: 01/04/2023]
Abstract
Statins have been proposed as potential adjuvant to periodontal treatment due to their pleiotropic properties. A new thermosensitive chitosan hydrogel loaded with statins (atorvastatin and lovastatin) nanoemulsions was synthesized to allow a spatially controlled local administration of active compounds at lesion site. Spontaneous nano-emulsification method was used to synthesize statins loaded nanoemulsions. In vitro, atorvastatin and lovastatin loaded nanoemulsions were cytocompatible and were able to be uptake by oral epithelial cells. Treatment of Porphyromonas gingivalis infected oral epithelial cells and gingival fibroblasts with atorvastatin and lovastatin loaded nanoemulsions decreased significantly pro-inflammatory markers expression (TNF-α and IL-1β) and pro-osteoclastic RANKL. Nevertheless, such treatment induced the expression of Bone sialoprotein 2 (BSP2) in osteoblast emphasizing the pro-healing properties of atorvastatin and lovastatin nanoemulsions. In vivo, in a calvarial bone defect model (2 mm), treatment with the hydrogel loaded with atorvastatin and lovastatin nanoemulsions induced a significant increase of the neobone formation in comparison with systemic administration of statins. This study demonstrates the potential of this statins loaded hydrogel to improve bone regeneration and to decrease soft tissue inflammation. Its use in the specific context of periodontitis management could be considered in the future with a reduced risk of side effects.
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Affiliation(s)
- Catherine Petit
- INSERM, UMR 1260 'Regenerative Nanomedicine', Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France; Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France; Pôle de Médecine et de Chirurgie Bucco-Dentaires, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Fareeha Batool
- INSERM, UMR 1260 'Regenerative Nanomedicine', Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France; Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
| | - Céline Stutz
- INSERM, UMR 1260 'Regenerative Nanomedicine', Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Nicolas Anton
- Université de Strasbourg, CNRS, CAMB UMR 7199, Strasbourg, France
| | - Andrey Klymchenko
- Université de Strasbourg, CNRS, LBP UMR 7021, F-67000 Strasbourg, France
| | - Thierry Vandamme
- Université de Strasbourg, CNRS, CAMB UMR 7199, Strasbourg, France
| | - Nadia Benkirane-Jessel
- INSERM, UMR 1260 'Regenerative Nanomedicine', Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France
| | - Olivier Huck
- INSERM, UMR 1260 'Regenerative Nanomedicine', Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg, France; Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France; Pôle de Médecine et de Chirurgie Bucco-Dentaires, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
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16
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Rosiuk V, Runser A, Klymchenko A, Reisch A. Controlling Size and Fluorescence of Dye-Loaded Polymer Nanoparticles through Polymer Design. Langmuir 2019; 35:7009-7017. [PMID: 31081637 DOI: 10.1021/acs.langmuir.9b00721] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanoprecipitation is a straightforward yet powerful technique to synthesize polymer nanoparticles loaded with various biologically active compounds or contrast agents. Particle formation in this approach is kinetically controlled, and various assembly parameters have been used to control the size distribution and properties of the formed nanoparticles. Here, the influence of the nature of the polymer on the formation of nanoparticles in nanoprecipitation is studied systematically by varying its hydrophobicity and charge over a broad range. For this, methacrylate copolymers with different types and fractions of hydrophobic, hydrophilic, and charged side groups are synthesized. Nanoprecipitation of these polymers shows that particle size increases with increasing global hydrophobicity of the polymers. At the same time, both hydrophilic and charged groups reduce particle size. In this way, we achieve control over particle size from ∼10 to 200 nm. Furthermore, the effect of the polymer nature on the photophysical properties of nanoparticles loaded with a fluorescent dye, a rhodamine B derivative with a bulky hydrophobic counterion (fluorinated tetraphenylborate), is studied. It is found that the hydrophobic/hydrophilic balance of the polymer modulates to a large extent the spectral properties and fluorescence quantum yield of the dye encapsulated at high concentration, which reflects changes in the dye aggregation within the polymer matrix. Thus, we show how polymer chemistry can tune kinetically controlled formation of nanoparticles and encapsulation of the load. The concepts introduced here should be valuable tools for the design of nanoparticles for imaging and drug-delivery applications.
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Affiliation(s)
- Vitalii Rosiuk
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Faculté de Pharmacie , Université de Strasbourg , Cedex 67401 Illkirch , France
| | - Anne Runser
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Faculté de Pharmacie , Université de Strasbourg , Cedex 67401 Illkirch , France
| | - Andrey Klymchenko
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Faculté de Pharmacie , Université de Strasbourg , Cedex 67401 Illkirch , France
| | - Andreas Reisch
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Faculté de Pharmacie , Université de Strasbourg , Cedex 67401 Illkirch , France
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17
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Skilitsi AI, Agathangelou D, Shulov I, Conyard J, Haacke S, Mély Y, Klymchenko A, Léonard J. Ultrafast photophysics of the environment-sensitive 4'-methoxy-3-hydroxyflavone fluorescent dye. Phys Chem Chem Phys 2018; 20:7885-7895. [PMID: 29509200 DOI: 10.1039/c7cp08584b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The excited state intramolecular proton transfer (ESIPT) of 3-hydroxyflavone derivatives results in a fluorescence spectrum composed of two emission bands, the relative intensity of which is strongly influenced by the interaction with the local environment. We use time-resolved fluorescence and ultrafast transient absorption spectroscopies to investigate the photophysics of 4'-methoxy-3-hydroxyflavone in different solvents characterized by various polarities and hydrogen (H) bonding capabilities. We evidence that in this compound, the ESIPT reaction rate varies by more than 3 orders of magnitude, depending on the H-bonding capability of its local environment. This remarkable property is attributed to the moderate electron-donating strength of the 4'-methoxy substituent, and turns this fluorescent dye into a very promising fluorescent probe of biomolecular structures and interactions, where local structural heterogeneity may possibly be revealed by resolving a distribution of ESIPT reaction rates.
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Affiliation(s)
- Anastasia Ioanna Skilitsi
- Institut de Physique et Chimie des Matériaux de Strasbourg, & Labex NIE CNRS Université de Strasbourg, Strasbourg, France.
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18
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Dukhno O, Przybilla F, Collot M, Klymchenko A, Pivovarenko V, Buchner M, Muhr V, Hirsch T, Mély Y. Quantitative assessment of energy transfer in upconverting nanoparticles grafted with organic dyes. Nanoscale 2017; 9:11994-12004. [PMID: 28795714 DOI: 10.1039/c6nr09706e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Upconverting nanoparticles (UCNPs) are luminophores that have been investigated for a multitude of biological applications, notably low-background imaging, high-sensitivity assays, and cancer theranostics. In these applications, they are frequently used as a donor in resonance energy transfer (RET) pairs. However, because of the peculiarity and non-linearity of their luminescence mechanism, their behavior as a RET pair component has been difficult to predict quantitatively, preventing their optimization for subsequent applications. In this article, we assembled UCNP-organic dye RET systems and investigated their luminescence decays and spectra, with varying UCNP sizes and quantities of dyes grafted onto their surface. We observed an increase in RET efficiency with lower particle sizes and higher dye decoration. We also observed several unexpected effects, notably a quenching of UCNP luminescence bands that are not resonant with the absorption of organic dyes. We proposed a semi-empirical Monte Carlo model for predicting the behavior of UCNP-organic dye systems, and validated it by comparison with our experimental data. These findings will be useful for the development of more accurate UCNP-based assays, sensors, and imaging agents, as well as for optimization of UCNP-organic dye RET systems employed in cancer treatment and theranostics.
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Affiliation(s)
- Oleksii Dukhno
- Laboratory of Biophotonics and Pharmacology, UMR 7213 CNRS, University of Strasbourg, 67000 Strasbourg, France.
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Ding S, Anton N, Akram S, Er-Rafik M, Anton H, Klymchenko A, Yu W, Vandamme TF, Serra CA. A new method for the formulation of double nanoemulsions. Soft Matter 2017; 13:1660-1669. [PMID: 28145556 DOI: 10.1039/c6sm02603f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Double emulsions are very attractive systems for many reasons; the most important of these are their capacity to encapsulate hydrophilic and lipophilic molecules simultaneously in a single particle and their potentiality to protect fragile hydrophilic molecules from the continuous phase. Double emulsions represent a technology that is widely present down to the micrometer scale; however, double nanoemulsions, with their new potential applications as nanomedicines or diagnosis agents, currently present a significant challenge. In this study, we propose an original two-step approach for the fabrication of double nanoemulsions with a final size below 200 nm. The process consists of the formulation of a primary water-in-oil (w1/O) nanoemulsion by high-pressure homogenization, followed by the re-emulsification of this primary emulsion by a low-energy method to preserve the double nanostructure. Various characterization techniques were undertaken to confirm the double structure and to evaluate the encapsulation efficiency of a small hydrophilic probe in the inner aqueous droplets. Complementary fluorescence confocal and cryo-TEM microscopy experiments were conducted to characterize and confirm the double structure of the double nanoemulsion.
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Affiliation(s)
- Shukai Ding
- Institut Charles Sadron (ICS) - UPR 22 CNRS, Strasbourg, France
| | - Nicolas Anton
- CNRS 7199, Laboratoire de Conception et Application de Molécules Bioactives (CAMB), Equipe de Pharmacie Biogalénique, 74 route du Rhin, 67401 Illkirch Cedex, France and Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch Cedex, France.
| | - Salman Akram
- CNRS 7199, Laboratoire de Conception et Application de Molécules Bioactives (CAMB), Equipe de Pharmacie Biogalénique, 74 route du Rhin, 67401 Illkirch Cedex, France and Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch Cedex, France.
| | - Meriem Er-Rafik
- Institut Charles Sadron (ICS) - UPR 22 CNRS, Strasbourg, France
| | - Halina Anton
- CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, 74 route du Rhin, 67401 Illkirch Cedex, France
| | - Andrey Klymchenko
- CNRS 7213, Laboratoire de Biophotonique et Pharmacologie, 74 route du Rhin, 67401 Illkirch Cedex, France
| | - Wei Yu
- Institut Charles Sadron (ICS) - UPR 22 CNRS, Strasbourg, France
| | - Thierry F Vandamme
- CNRS 7199, Laboratoire de Conception et Application de Molécules Bioactives (CAMB), Equipe de Pharmacie Biogalénique, 74 route du Rhin, 67401 Illkirch Cedex, France and Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, 67401 Illkirch Cedex, France.
| | - Christophe A Serra
- Institut Charles Sadron (ICS) - UPR 22 CNRS, Strasbourg, France and Université de Strasbourg, École Européenne de Chimie, Polymères et Matériaux (ECPM), Strasbourg, France.
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20
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Djiokeng Paka G, Doggui S, Zaghmi A, Safar R, Dao L, Reisch A, Klymchenko A, Roullin VG, Joubert O, Ramassamy C. Neuronal Uptake and Neuroprotective Properties of Curcumin-Loaded Nanoparticles on SK-N-SH Cell Line: Role of Poly(lactide-co-glycolide) Polymeric Matrix Composition. Mol Pharm 2015; 13:391-403. [PMID: 26618861 DOI: 10.1021/acs.molpharmaceut.5b00611] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Curcumin, a neuroprotective agent with promising therapeutic approach has poor brain bioavailability. Herein, we demonstrate that curcumin-encapsulated poly(lactide-co-glycolide) (PLGA) 50:50 nanoparticles (NPs-Cur 50:50) are able to prevent the phosphorylation of Akt and Tau proteins in SK-N-SH cells induced by H2O2 and display higher anti-inflammatory and antioxidant activities than free curcumin. PLGA can display various physicochemical and degradation characteristics for controlled drug release applications according to the matrix used. We demonstrate that the release of curcumin entrapped into a PLGA 50:50 matrix (NPs-Cur 50:50) is faster than into PLGA 65:35. We have studied the effects of the PLGA matrix on the expression of some key antioxidant- and neuroprotective-related genes such as APOE, APOJ, TRX, GLRX, and REST. NPs-Cur induced the elevation of GLRX and TRX while decreasing APOJ mRNA levels and had no effect on APOE and REST expressions. In the presence of H2O2, both NPs-Cur matrices are more efficient than free curcumin to prevent the induction of these genes. Higher uptake was found with NPs-Cur 50:50 than NPs-Cur 65:35 or free curcumin. By using PLGA nanoparticles loaded with the fluorescent dye Lumogen Red, we demonstrated that PLGA nanoparticles are indeed taken up by neuronal cells. These data highlight the importance of polymer composition in the therapeutic properties of the nanodrug delivery systems. Our study demonstrated that NPs-Cur enhance the action of curcumin on several pathways implicated in the pathophysiology of Alzheimer's disease (AD). Overall, these results suggest that PLGA nanoparticles are a promising strategy for the brain delivery of drugs for the treatment of AD.
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Affiliation(s)
- Ghislain Djiokeng Paka
- INRS-Institut Armand Frappier, 531 Boulevard des Prairies, Laval, Quebec H7V 1B7, Canada.,INAF, Laval University , Québec G1V 0A6, Canada
| | - Sihem Doggui
- INRS-Institut Armand Frappier, 531 Boulevard des Prairies, Laval, Quebec H7V 1B7, Canada
| | - Ahlem Zaghmi
- INRS-Institut Armand Frappier, 531 Boulevard des Prairies, Laval, Quebec H7V 1B7, Canada
| | - Ramia Safar
- Faculté de Pharmacie, EA3452 CITHEFOR, Université de Lorraine , 54000 Nancy, France
| | - Lé Dao
- INRS-EMT, Québec H5A 1K6, Canada
| | - Andreas Reisch
- Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg , 67081 Strasbourg, France
| | - Andrey Klymchenko
- Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, Université de Strasbourg , 67081 Strasbourg, France
| | - V Gaëlle Roullin
- Laboratoire de Nanotechnologies Pharmaceutiques, Faculté de Pharmacie, Université de Montréal , Montréal H3T 1J4, Canada
| | - Olivier Joubert
- Faculté de Pharmacie, EA3452 CITHEFOR, Université de Lorraine , 54000 Nancy, France
| | - Charles Ramassamy
- INRS-Institut Armand Frappier, 531 Boulevard des Prairies, Laval, Quebec H7V 1B7, Canada.,INAF, Laval University , Québec G1V 0A6, Canada
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21
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Kilin V, Glushonkov O, Herdly L, Klymchenko A, Richert L, Mely Y. Fluorescence lifetime imaging of membrane lipid order with a ratiometric fluorescent probe. Biophys J 2015; 108:2521-2531. [PMID: 25992730 PMCID: PMC4457243 DOI: 10.1016/j.bpj.2015.04.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/23/2015] [Accepted: 04/03/2015] [Indexed: 12/11/2022] Open
Abstract
To monitor the lateral segregation of lipids into liquid-ordered (Lo) and -disordered (Ld) phases in lipid membranes, environment-sensitive dyes that partition in both phases but stain them differently have been developed. Of particular interest is the dual-color F2N12S probe, which can discriminate the two phases through the ratio of its two emission bands. These bands are associated with the normal (N(∗)) and tautomer (T(∗)) excited-state species that result from an excited-state intramolecular proton transfer. In this work, we investigated the potency of the time-resolved fluorescence parameters of F2N12S to discriminate lipid phases in model and cell membranes. Both the long and mean lifetime values of the T(∗) form of F2N12S were found to differ by twofold between Ld and Lo phases as a result of the restriction in the relative motions of the two aromatic moieties of F2N12S imposed by the highly packed Lo phase. This differed from the changes in the ratio of the two emission bands between the two phases, which mainly resulted from the decreased hydration of the N(∗) form in the Lo phase. Importantly, the strong difference in lifetimes between the two phases was preserved when cholesterol was added to the Ld phase. The two phases could be imaged with high contrast by fluorescence lifetime imaging microscopy (FLIM) on giant unilamellar vesicles. FLIM images of F2N12S-labeled live HeLa cells confirmed that the plasma membrane was mainly in the Lo-like phase. Furthermore, the two phases were found to be homogeneously distributed all over the plasma membrane, indicating that they are highly mixed at the spatiotemporal resolution of the FLIM setup. Finally, FLIM could also be used to sensitively monitor the change in lipid phase upon cholesterol depletion and apoptosis.
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Affiliation(s)
- Vasyl Kilin
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch Cedex, France
| | - Oleksandr Glushonkov
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch Cedex, France
| | - Lucas Herdly
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch Cedex, France
| | - Andrey Klymchenko
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch Cedex, France
| | - Ludovic Richert
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch Cedex, France
| | - Yves Mely
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch Cedex, France.
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Greiner VJ, Manin C, Larquet E, Ikhelef N, Gréco F, Naville S, Milhiet PE, Ronzon F, Klymchenko A, Mély Y. Characterization of the structural modifications accompanying the loss of HBsAg particle immunogenicity. Vaccine 2014; 32:1049-54. [DOI: 10.1016/j.vaccine.2014.01.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/20/2013] [Accepted: 01/02/2014] [Indexed: 10/25/2022]
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23
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Das R, Duportail G, Ghose A, Richert L, Klymchenko A, Chakraborty S, Yesylevskyy S, Mely Y. Tuning excited-state proton transfer dynamics of a 3-hydroxychromone dye in supramolecular complexes via host–guest steric compatibility. Phys Chem Chem Phys 2014; 16:776-84. [DOI: 10.1039/c3cp52597j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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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24
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Das R, Duportail G, Richert L, Klymchenko A, Mély Y. Sensing micelle hydration by proton-transfer dynamics of a 3-hydroxychromone dye: role of the surfactant headgroup and chain length. Langmuir 2012; 28:7147-7159. [PMID: 22515420 DOI: 10.1021/la300103a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The dynamics of the excited-state intramolecular proton-transfer (ESIPT) reaction of 2-(2'-furyl)-3-hydroxychromone (FHC) was studied in micelles by time-resolved fluorescence. The proton-transfer dynamics of FHC was found to be sensitive to the hydration and charge of the micelles, demonstrated through a decrease of the ESIPT rate constant (k(PT)) in the sequence cationic → nonionic → anionic micelles. A remarkably slow ESIPT with a time constant (τ(PT)) of ~100 ps was observed in the anionic sodium dodecyl sulfate and sodium tetradecyl sulfate micelles, whereas it was quite fast (τ(PT) ≈ 15 ps) in the cationic cetyltrimethylammonium bromide and tetradecyltrimethylammonium bromide micelles. In the nonionic micelles of Brij-78, Brij-58, Tween-80, and Tween-20, ESIPT occurred with time constants (τ(PT) ≈ 35-65 ps) intermediate between those of the cationic and anionic micelles. The slower ESIPT dynamics in the anionic micelles than the cationic micelles is attributed to a relatively stronger hydration of the negatively charged headgroups of the former than the positively charged headgroups of the latter, which significantly weakens the intramolecular hydrogen bond of FHC in the Stern layer of the anionic micelles compared to the latter. In addition, electrostatic attraction between the positively charged -N(CH(3))(3)(+) headgroups and the negatively charged 4-carbonyl moiety of FHC effectively screens the intramolecular hydrogen bond from the perturbation of water molecules in the micelle-water interface of the cationic micelles, whereas in the anionic micelles, this screening of the intramolecular hydrogen bond is much less efficient due to an electrostatic repulsion between its negatively charged -OSO(3)(-) headgroups and the 4-carbonyl moiety. As for the nonionic micelles, a moderate level of hydration, and the absence of any charged headgroups, causes an ESIPT dynamics faster than that of the anionic but slower than that of the cationic micelles. Furthermore, the ESIPT rate decreased with a decrease of the hydrophobic chain length of the surfactants due to the stronger hydration of the micelles of shorter chain surfactants than those of longer chain surfactants, arising from a less compact packing of the former surfactants compared to the latter surfactants.
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Affiliation(s)
- Ranjan Das
- Department of Chemistry, West Bengal State University, Barasat, Kolkata 700126, India
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25
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van Hell AJ, Klymchenko A, Burgers PP, Moret EE, Jiskoot W, Hennink WE, Crommelin DJA, Mastrobattista E. Conformation and intermolecular interactions of SA2 peptides self-assembled into vesicles. J Phys Chem B 2010; 114:11046-52. [PMID: 20687533 DOI: 10.1021/jp103440d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previously we have shown that the recombinantly produced SA2 amphiphilic oligopeptide (Ac-Ala-Ala-Val-Val-Leu-Leu-Leu-Trp-Glu-Glu-COOH) self-assembles into nanovesicles (van Hell et al. 2007). In this study, the intermolecular interactions that contribute to the formation of such peptide vesicles are examined. First, analysis of a 3-hydroxyflavone fluorescent probe inserted into the peptide assemblies demonstrated that the peptide self-assembly is based on hydrophobic clustering. The polarity of this hydrophobic microenvironment was comparable to that of negatively charged lipid bilayers. A substantial level of hydration at the hydrophilic-hydrophobic interface was detected, as was further confirmed by tryptophan fluorescence analysis. However, organic solvents such as acetonitrile, tetrahydrofuran, or ethanol could not disrupt SA2 oligopeptide vesicles, whereas these solvents fully disintegrated lipid vesicles. Instead, the SA2 assembly immediately disintegrated in hydrogen breaking solvents such dimethylsulfoxide and dimethylformamide, suggesting the involvement of additional intermolecular interactions via hydrogen bonding. Circular dichroism and Fourier transform infrared spectroscopy excluded well-defined patterns of intramolecular hydrogen bonding and indicated the polyproline type II as the dominant SA2 peptide conformation, which enables intermolecular hydrogen bonding. All-atom computational simulations were used to confirm the presence of such intermolecular hydrogen bonds and degrees of hydration. On the basis of the experimental and computational data presented, we propose a model of an interdigitated peptide assembly that involves intermolecular hydrogen bonding in addition to hydrophobic interactions that stabilize SA2 oligopeptide vesicles.
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Affiliation(s)
- Albert J van Hell
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
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Perino A, Klymchenko A, Morere A, Contal E, Rameau A, Guenet JM, Mély Y, Wagner A. Structure and Behavior of Polydiacetylene-Based Micelles. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000459] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Greiner VJ, Egelé C, Oncul S, Ronzon F, Manin C, Klymchenko A, Mély Y. Characterization of the lipid and protein organization in HBsAg viral particles by steady-state and time-resolved fluorescence spectroscopy. Biochimie 2010; 92:994-1002. [DOI: 10.1016/j.biochi.2010.04.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Accepted: 04/19/2010] [Indexed: 11/26/2022]
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28
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Abstract
We report on dramatic differences in fluorescence spectra of 4'-dimethylamino-3-hydroxyflavone (probe F) studied in phospholipid membranes of different charge (phosphatidyl glycerol, phosphatidylcholine (PC), their mixture and the mixture of PC with a cationic lipid). The effect consists in variations of relative intensities at two well-separated band maxima at 520 and 570 nm belonging to normal (N*) and tautomer (T*) excited states of flavone chromophore. Based on these studies we propose a new approach to measure electrostatic potential at the surface layer of phospholipid membranes, which is based on potential-dependent changes of bilayer hydration and involves very sensitive and convenient ratiometric measurements in fluorescence emission.
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Affiliation(s)
- G Duportail
- Laboratoire de Pharmacologie et Physicochimie, UMR 7034 du CNRS, Faculté de Pharmacie, Université Louis Pasteur, Illkirch, France
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