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Makky A, Czajor J, Konovalov O, Zhakhov A, Ischenko A, Behl A, Singh S, Abuillan W, Shevtsov M. X-ray reflectivity study of the heat shock protein Hsp70 interaction with an artificial cell membrane model. Sci Rep 2023; 13:19157. [PMID: 37932378 PMCID: PMC10628213 DOI: 10.1038/s41598-023-46066-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 10/27/2023] [Indexed: 11/08/2023] Open
Abstract
Membrane-bound heat shock protein 70 (Hsp70) apart from its intracellular localization was shown to be specifically expressed on the plasma membrane surface of tumor but not normal cells. Although the association of Hsp70 with lipid membranes is well documented the exact mechanisms for chaperone membrane anchoring have not been fully elucidated. Herein, we addressed the question of how Hsp70 interacts with negatively charged phospholipids in artificial lipid compositions employing the X-ray reflectivity (XRR) studies. In a first step, the interactions between dioleoylphosphatidylcholine (DOPC) in the presence or absence of dioleoylphosphatidylserine (DOPS) and Hsp70 had been assessed using Quartz crystal microbalance measurements, suggesting that Hsp70 adsorbs to the surface of DOPC/DOPS bilayer. Atomic force microscopy (AFM) imaging demonstrated that the presence of DOPS is required for stabilization of the lipid bilayer. The interaction of Hsp70 with DOPC/DOPS lipid compositions was further quantitatively determined by high energy X-ray reflectivity. A systematic characterization of the chaperone-lipid membrane interactions by various techniques revealed that artificial membranes can be stabilized by the electrostatic interaction of anionic DOPS lipids with Hsp70.
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Affiliation(s)
- Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 91400, Orsay, France
| | - Julian Czajor
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, University of Heidelberg, 69120, Heidelberg, Germany
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF), 38043, Grenoble, France
| | - Alexander Zhakhov
- Saint-Petersburg Pasteur Institute, Mira Str. 14, 197101, St. Petersburg, Russia
| | - Alexander Ischenko
- Saint-Petersburg Pasteur Institute, Mira Str. 14, 197101, St. Petersburg, Russia
| | - Ankita Behl
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Shailja Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Wasim Abuillan
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, University of Heidelberg, 69120, Heidelberg, Germany.
| | - Maxim Shevtsov
- Klinikum Rechts Der Isar, Technical University of Munich, Ismaninger Str. 22, 81675, Munich, Germany.
- Institute of Cytology of the Russian Academy of Sciences (RAS), Tikhoretsky Ave. 4, 194064, St. Petersburg, Russia.
- Personalized Medicine Centre, Almazov National Medical Research Centre, Akkuratova Str. 2, 197341, St. Petersburg, Russia.
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Ho T, Guidolin K, Makky A, Valic M, Ding L, Bu J, Zheng M, Cheng MHY, Yau J, Chen J, Zheng G. Novel Strategy to Drive the Intracellular Uptake of Lipid Nanoparticles for Photodynamic Therapy. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202303145] [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: 03/17/2023]
Affiliation(s)
- Tiffany Ho
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
- Department of Pharmaceutical Sciences University of Toronto 144 College St. Toronto Toronto ON M5S 3M2 Canada
| | - Keegan Guidolin
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Ali Makky
- Université Paris-Saclay CNRS Institut Galien Paris-Saclay 92296 Châtenay-Malabry France
| | - Michael Valic
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
- Institute of Biomedical Engineering University of Toronto 64 College St. Toronto ON M5S 3G9 Canada
| | - Lili Ding
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Jiachuan Bu
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Mark Zheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Miffy H. Y. Cheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Jeremy Yau
- Department of Pharmaceutical Sciences University of Toronto 144 College St. Toronto Toronto ON M5S 3M2 Canada
| | - Juan Chen
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Gang Zheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
- Department of Pharmaceutical Sciences University of Toronto 144 College St. Toronto Toronto ON M5S 3M2 Canada
- Institute of Biomedical Engineering University of Toronto 64 College St. Toronto ON M5S 3G9 Canada
- Department of Medical Biophysics University of Toronto 101 College St. Toronto ON M5G 1L7 Canada
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3
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Ho T, Guidolin K, Makky A, Valic M, Ding L, Bu J, Zheng M, Cheng MHY, Yau J, Chen J, Zheng G. Novel Strategy to Drive the Intracellular Uptake of Lipid Nanoparticles for Photodynamic Therapy. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/anie.202303145] [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: 03/17/2023]
Affiliation(s)
- Tiffany Ho
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
- Department of Pharmaceutical Sciences University of Toronto 144 College St. Toronto Toronto ON M5S 3M2 Canada
| | - Keegan Guidolin
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Ali Makky
- Université Paris-Saclay CNRS Institut Galien Paris-Saclay 92296 Châtenay-Malabry France
| | - Michael Valic
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
- Institute of Biomedical Engineering University of Toronto 64 College St. Toronto ON M5S 3G9 Canada
| | - Lili Ding
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Jiachuan Bu
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Mark Zheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Miffy H. Y. Cheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Jeremy Yau
- Department of Pharmaceutical Sciences University of Toronto 144 College St. Toronto Toronto ON M5S 3M2 Canada
| | - Juan Chen
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
| | - Gang Zheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5-354 Toronto ON M5G1L7 Canada
- Department of Pharmaceutical Sciences University of Toronto 144 College St. Toronto Toronto ON M5S 3M2 Canada
- Institute of Biomedical Engineering University of Toronto 64 College St. Toronto ON M5S 3G9 Canada
- Department of Medical Biophysics University of Toronto 101 College St. Toronto ON M5G 1L7 Canada
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4
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Cressey P, Abuillan W, Ibrahim N, Alhoussein J, Konovalov O, Zheng G, Makky A. Self-Organization of Lipid-Porphyrin Conjugates at the Air/Water Interface. Chemphyschem 2023; 24:e202200687. [PMID: 36412498 DOI: 10.1002/cphc.202200687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/23/2022]
Abstract
Lipid-porphyrin conjugates are versatile compounds which can self-assemble into liposome-like structures with multifunctional properties. Most of the conjugates that have been described so far, consisted in grafting pyropheophorbide-a (Pyro-a) or other porphyrin derivatives through the esterification of the hydroxyl group in the sn-2 position of a lysophosphatidylcholine. However, despite the versatility of these conjugates, less is known about the impact of the lipid backbone structure on their 2D phase behavior at the air/water interface and more precisely on their fine structures normal to the interface as well as on their in-plane organization. Herein, we synthesized a new lipid-porphyrin conjugate (PyroLSM) based on the amide coupling of Pyro-a to a lysosphingomyelin backbone (LSM) and we compared its interfacial behavior to that of Pyro-a and Pyro-a conjugated lysophosphatidylcholine (PyroLPC) using Langmuir balance combined to a variety of other physical techniques. Our results provided evidence on the significant impact of the lipid backbone on the lateral packing of the conjugates as well as on the shape and size of the formed domains. Compared to Pyro-a and PyroLPC monolayers, PyroLSM exhibited the highest lateral packing which highlights the role of the lipid backbone in controlling their 2D organization which in turn may impact the photophysical properties of their assemblies.
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Affiliation(s)
- Paul Cressey
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France
| | - Wasim Abuillan
- Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120, Heidelberg, Germany
| | - Nada Ibrahim
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France.,IMESCIA, Faculté de Pharmacie, 92296, Châtenay-Malabry, France
| | - Jana Alhoussein
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF), Grenoble, 38043, France
| | - Gang Zheng
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, Ontario, M5G 1L7, Canada.,Department of Medical Biophysics, University of Toronto, 101 College St., Toronto, ONM5G 1L7, Canada
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France
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Ho T, Guidolin K, Makky A, Valic M, Ding L, Bu J, Zheng M, Cheng MH, Yau J, Chen J, Zheng G. Novel Strategy to Drive the Intracellular Uptake of Lipid Nanoparticles for Photodynamic Therapy. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202218218] [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: 02/23/2023]
Affiliation(s)
- Tiffany Ho
- University of Toronto Leslie Dan Faculty of Pharmacy CANADA
| | - Keegan Guidolin
- University of Toronto Institute of Biomedical Engineering CANADA
| | - Ali Makky
- Paris-Saclay University: Universite Paris-Saclay Institut Galien Paris-Saclay FRANCE
| | - Michael Valic
- University of Toronto Institute of Biomedical Engineering CANADA
| | - Lili Ding
- University Health Network Princess Margaret Cancer Centre CANADA
| | - Jiachuan Bu
- University Health Network Princess Margaret Cancer Centre CANADA
| | - Mark Zheng
- University Health Network Princess Margaret Cancer Centre CANADA
| | - Miffy H.Y. Cheng
- University Health Network Princess Margaret Cancer Centre CANADA
| | - Jeremy Yau
- University of Toronto Leslie Dan Faculty of Pharmacy CANADA
| | - Juan Chen
- University Health Network Princess Margaret Cancer Centre CANADA
| | - Gang Zheng
- University of Toronto Princess Margaret Cancer Centre 101 College Street, TMDT 5-363 M5G 1L7 Toronto CANADA
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6
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Ho T, Guidolin K, Makky A, Valic M, Ding L, Bu J, Zheng M, Cheng MHY, Yau J, Chen J, Zheng G. Novel Strategy to Drive the Intracellular Uptake of Lipid Nanoparticles for Photodynamic Therapy. Angew Chem Int Ed Engl 2023; 62:e202218218. [PMID: 36811315 DOI: 10.1002/anie.202218218] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/15/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
Nanoparticles' uptake by cancer cells upon reaching the tumor microenvironment is often the rate-limiting step in cancer nanomedicine. Herein, we report that the inclusion of aminopolycarboxylic acid conjugated lipids, such as EDTA- or DTPA-hexadecylamide lipids in liposome-like porphyrin nanoparticles (PS) enhanced their intracellular uptake by 25-fold, which was attributed to these lipids' ability to fluidize the cell membrane in a detergent-like manner rather than by metal chelation of EDTA or DTPA. EDTA-lipid-incorporated-PS (ePS) take advantage of its unique active uptake mechanism to achieve >95 % photodynamic therapy (PDT) cell killing compared to <5 % cell killing by PS. In multiple tumor models, ePS demonstrated fast fluorescence-enabled tumor delineation within minutes post-injection and increased PDT potency (100 % survival rate) compared to PS (60 %). This study offers a new nanoparticle cellular uptake strategy to overcome challenges associated with conventional drug delivery.
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Affiliation(s)
- Tiffany Ho
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada.,Department of Pharmaceutical Sciences, University of Toronto, 144 College St. Toronto, Toronto, ON M5S 3M2, Canada
| | - Keegan Guidolin
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Bâtiment Henri Moissan, 91400, Orsay, France
| | - Michael Valic
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada.,Institute of Biomedical Engineering, University of Toronto, 64 College St., Toronto, ON M5S 3G9, Canada
| | - Lili Ding
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada
| | - Jiachuan Bu
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada
| | - Mark Zheng
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada
| | - Miffy H Y Cheng
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada
| | - Jeremy Yau
- Department of Pharmaceutical Sciences, University of Toronto, 144 College St. Toronto, Toronto, ON M5S 3M2, Canada
| | - Juan Chen
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada
| | - Gang Zheng
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, PMCRT 5-354, Toronto, ON M5G1L7, Canada.,Department of Pharmaceutical Sciences, University of Toronto, 144 College St. Toronto, Toronto, ON M5S 3M2, Canada.,Institute of Biomedical Engineering, University of Toronto, 64 College St., Toronto, ON M5S 3G9, Canada.,Department of Medical Biophysics, University of Toronto, 101 College St., Toronto, ON M5G 1L7, Canada
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Cressey P, Bronstein LG, Benmahmoudi R, Rosilio V, Regeard C, Makky A. Novel liposome-like assemblies composed of phospholipid-porphyrin conjugates with photothermal and photodynamic activities against bacterial biofilms. Int J Pharm 2022; 623:121915. [PMID: 35716977 DOI: 10.1016/j.ijpharm.2022.121915] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/10/2022] [Accepted: 06/11/2022] [Indexed: 10/18/2022]
Abstract
Phospholipid-Porphyrin (PL-Por) conjugates are unique building blocks that can self assemble into liposome-like structures with improved photophysical properties compared to their monomeric counterparts. The high packing density of porphyrin moieties enables these assemblies to exhibit high photothermal conversion efficiency as well as photodynamic activity. Thus, PL-Por conjugates assemblies can be used for photodynamic therapy (PDT) and photothermal therapy (PTT) applications against resistant bacteria and biofilms. In order to tune the PD/PT properties of such nanosystems, we developed six different supramolecular assemblies composed of newly synthesized PL-Por conjugates bearing either pheophorbide-a (PhxLPC) or pyropheophorbide-a (PyrxLPC) photosensitizers (PSs) for combined PDT/PTT against planktonic bacteria and their biofilms. In this study, the influence of the chemical structure of the phospholipid backbone as well as that of the PS on the photothermal conversion efficiency, the photodynamic activity and the stability of these assemblies in biological medium were determined. Then their antimicrobial efficiency was assessed on S. aureus and P. aeruginosa planktonic cultures and biofilms. The two studied systems show almost the same photothermal effect against planktonic cultures and biofilms of S. aureus and P. aeruginosa. However, PhxLPC vesicles exhibit superior photodynamic activity, making them the best combination for PTT/PDT. Such results highlight the higher potential of the photodynamic activity of PL-Por nanoassemblies compared to their photothermal conversion in combating bacterial infections.
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Affiliation(s)
- Paul Cressey
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry cedex, France
| | - Louis-Gabriel Bronstein
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry cedex, France
| | - Rayene Benmahmoudi
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry cedex, France; Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France
| | - Véronique Rosilio
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry cedex, France
| | - Christophe Regeard
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France..
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry cedex, France.
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Bronstein LG, Tóth Á, Cressey P, Rosilio V, Di Meo F, Makky A. Phospholipid-porphyrin conjugates: deciphering the driving forces behind their supramolecular assemblies. Nanoscale 2022; 14:7387-7407. [PMID: 35536011 DOI: 10.1039/d2nr01158a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Phospholipid-porphyrin conjugates (PL-Por) are nowadays considered as a unique class of building blocks that can self-assemble into supramolecular structures that possess multifunctional properties and enhanced optoelectronics characteristics compared to their disassembled counterparts. However, despite their versatile properties, little is known about the impact of the packing parameter of PL-Por conjugates on their assembling mechanism and their molecular organization inside these assemblies. To gain a better understanding on their assembling properties, we synthesized two new series of PL-Por conjugates with different alkyl sn2-chain lengths linked via an amide bond to either pheophorbide-a (PhxLPC) or pyropheophorbide-a (PyrxLPC). By combining a variety of experimental techniques with molecular dynamics (MD) simulations, we investigated both the assembling and optical properties of the PL-Por either self-assembled or when incorporated into lipid bilayers. We demonstrated that independently of the linker length, PhxLPC assembled into closed ovoid structures, whereas PyrxLPC formed rigid open sheets. Interestingly, PyrxLPC assemblies displayed a significant red shift and narrowing of the Q-band indicating the formation of ordered J-aggregates. The MD simulations highlighted the central role of the interaction between porphyrin cores rather than the length difference between the two phospholipid chains in controlling the structure of the lipid bilayer membranes and thus their optical properties. Indeed, while PhxLPC have the tendency to form inter-leaflet π-stacked dimers, PyrxLPC conjugates formed dimers within the same leaflet. Altogether, this work could be used as guidelines for the design of new PL-Por conjugates that self-assemble into bilayer-like supramolecular structures with tunable morphology and optical properties.
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Affiliation(s)
- Louis-Gabriel Bronstein
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France.
| | - Ágota Tóth
- INSERM U1248 Pharmacology & Transplantation, Univ. Limoges, 2 rue du Prof. Descottes, F-87025, Limoges, France.
| | - Paul Cressey
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France.
| | - Véronique Rosilio
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France.
| | - Florent Di Meo
- INSERM U1248 Pharmacology & Transplantation, Univ. Limoges, 2 rue du Prof. Descottes, F-87025, Limoges, France.
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296, Châtenay-Malabry, France.
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Bronstein LG, Cressey P, Abuillan W, Konovalov O, Jankowski M, Rosilio V, Makky A. Influence of the porphyrin structure and linker length on the interfacial behavior of phospholipid-porphyrin conjugates. J Colloid Interface Sci 2021; 611:441-450. [PMID: 34968963 DOI: 10.1016/j.jcis.2021.12.114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 12/11/2022]
Abstract
HYPOTHESIS Phospholipid-porphyrin (Pl-Por) conjugates consist of porphyrin derivatives grafted to a lysophosphatidylcholine backbone. Owing to their structural similarities with phospholipids, Pl-Por conjugates can self-assemble into liposome-like assemblies. However, there is a significant lack of information concerning the impact of the porphyrin type and the length of the alkyl chain bearing the porphyrin on the interfacial behavior of the Pl-Por conjugates. We hypothesized that changing the chain length and the porphyrin type could impact their two-dimensional phase behavior and modulate the alignment between the two chains. EXPERIMENTS 6 Pl-Por conjugates with different alkyl chain lengths in the sn2 position of C16 lysophosphatidylcholine and coupled to either pheophorbide-a or pyropheophorbide-a were synthesized. Their interfacial behavior at the air/water interface was assessed using Langmuir balance combined to a variety of other physical techniques including Brewster angle microscopy, atomic force microscopy and X-ray reflectometry. FINDINGS Our results showed that all 6 Pl-Por form stable monolayers with the porphyrin moiety at the air/water interface. We also showed that changing the porphyrin moiety controlled the packing of the monolayer and thus the formation of organized domains. The chain length dictated the structure of the formed domains with no evidence of the alignment between the two chains.
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Affiliation(s)
| | - Paul Cressey
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Wasim Abuillan
- Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120 Heidelberg, Germany
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF), Grenoble 38043, France
| | - Maciej Jankowski
- European Synchrotron Radiation Facility (ESRF), Grenoble 38043, France
| | - Véronique Rosilio
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France.
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Massiot J, Abuillan W, Konovalov O, Makky A. Photo-triggerable liposomes based on lipid-porphyrin conjugate and cholesterol combination: Formulation and mechanistic study on monolayers and bilayers. Biochim Biophys Acta Biomembr 2021; 1864:183812. [PMID: 34743950 DOI: 10.1016/j.bbamem.2021.183812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/17/2021] [Accepted: 10/22/2021] [Indexed: 12/18/2022]
Abstract
Lipid-porphyrin conjugates are considered nowadays as promising building blocks for the conception of drug delivery systems with multifunctional properties such as photothermal therapy (PTT), photodynamic therapy (PDT), phototriggerable release, photoacoustic and fluorescence imaging. For this aim, we have recently synthesized a new lipid-porphyrin conjugate named PhLSM. This was obtained by coupling pheophorbide-a (Pheo-a), a photosensitizer derived from chlorophyll-a, to egg lyso-sphingomyelin. The pure PhLSMs were able to self-assemble into vesicle-like structures that were however not stable and formed aggregates with undefined structures due to the mismatch between the length of the alkyl chain in sn-1 position and the adjacent porphyrin. Herein, stable PhLSMs lipid bilayers were achieved by mixing PhLSMs with cholesterol which exhibits a complementary packing parameter. The interfacial behavior as well as the fine structures of their equimolar mixture was studied at the air/buffer interface by the mean of Langmuir balance and x-ray reflectomerty (XRR) respectively. Our XRR analysis unraveled the monolayer thickening and the increase in the lateral ordering of PhLSM molecules. Interestingly, we could prepare stable vesicles with this mixture that encapsulate hydrophilic fluorescent probe. The light-triggered release kinetics and the photothermal conversion were studied. Moreover, the obtained vesicles were photo-triggerable and allowed the release of an encapsulated cargo in an ON-OFF fashion.
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Affiliation(s)
- Julien Massiot
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Wasim Abuillan
- Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120 Heidelberg, Germany
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF), Grenoble Cedex 9, 38053, France
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France.
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Zmerli I, Ibrahim N, Cressey P, Denis S, Makky A. Design and Synthesis of New PEGylated Polydopamine-Based Nanoconstructs Bearing ROS-Responsive Linkers and a Photosensitizer for Bimodal Photothermal and Photodynamic Therapies against Cancer. Mol Pharm 2021; 18:3623-3637. [PMID: 34431682 DOI: 10.1021/acs.molpharmaceut.1c00597] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Polydopamine (PDA) nanoparticles (NPs) have recently acquired considerable attention for the development of nanoplatforms with multifunctional properties including photothermal (PTT) and photodynamic (PDT) activities. In addition to their high PTT performance, they can be easily conjugated to different types of photosensitizers (PSs) to acquire PDT activity. However, because of PDA free-radical scavenging properties, grafting the PSs directly to PDA surfaces may lead to an inefficient PDT outcome. Thus, the present work aims at synthesizing and characterizing a new PEGylated PDA-based nanoplatform with bifunctional PTT and PDT properties, which allows bimodal cancer therapy with the possibility to release the PS on demand in a spatiotemporal fashion. To do so, PDA NPs with a well-defined size and shape were prepared by the auto-oxidative self-polymerization process of dopamine hydrochloride in mild alkaline solution. The impact of the size on the PTT conversion efficiency was then determined. This allowed us to choose the optimal PDA NP size for PTT applications. Next, PDA NPs were decorated with SH-PEG polymers that bear at their extremity a thioketal reactive oxygen species-cleavable linker coupled to trisulfonated-tetraphenylporphyrin (TPPS3) chosen as a hydrophilic PS. The grafting efficiency of PS-conjugated PEG on PDA was demonstrated in situ using a quartz crystal microbalance with dissipation monitoring. In addition, the photoinduced release of the PS was demonstrated by 1H NMR. Finally, PTT/PDT bimodal therapy was assessed in vitro on human squamous esophageal cells by illuminating the PDA NPs at two different wavelengths, which showed the strong synergistic effect of combining PTT and PDT within this nanoplatform.
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Affiliation(s)
- Islam Zmerli
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Nada Ibrahim
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France.,IMESCIA, Faculté de Pharmacie, 92296 Châtenay-Malabry, France
| | - Paul Cressey
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Stéphanie Denis
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
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12
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Varenne F, Devoille L, Makky A, Feltin N, Violleau F, Barratt G, Vauthier C. Evaluation of the size distribution of a multimodal dispersion of polymer nanoparticles by microscopy after different methods of deposition. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.102047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Zmerli I, Michel JP, Makky A. Bioinspired polydopamine nanoparticles: synthesis, nanomechanical properties, and efficient PEGylation strategy. J Mater Chem B 2020; 8:4489-4504. [PMID: 32365146 DOI: 10.1039/c9tb02769f] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Polydopamine (PDA) is a bioinspired fascinating polymer which is considered nowadays as a material of choice for designing drug delivery nanosystems. Indeed, PDA exhibits multiple interesting features including simple preparation protocols, biocompatibility, simple functionalization procedures, free radicals scavenging and photothermal/photoacoustic properties. However, because of its heterogeneous structure, clear procedures about PDA nanoparticles synthesis and PEGylation with well-defined and reproducible physicochemical properties such as size, shape and nanomechanics are still needed. In this work, we established tightly controlled experimental conditions to synthesize PDA nanoparticles with well-defined size and yield. This allowed us to identify the factors that affect the most these two parameters and to construct surface response plots with accurate predictive values of size and yield. The nanomechanical properties of PDA NPs exhibiting different sizes have been studied with AFM nanoindentation experiments. Our results demonstrated for the first time that the elasticity of PDA NPs was decreasing with their size. This could be explained by the higher geometric packing order of the stacked oligomeric fractions inside the core of the biggest PDA NPs. Next, in order to determine the best PEGylation experimental conditions of PDA NPs using thiol-terminated PEG that allow grafting the highest polymer density with proteins repelling properties, we have first optimized the PEGylation strategy on PDA films. By using a combination of QCM-D and AFM experiments, we could demonstrate that efficient PEGylation of PDA films could be done even at low PEG concentration but in the presence of NaCl which exerts a salting out effect on PEG chains improving thus the grafting density. Finally, we transposed these experimental conditions to PDA NPs and we could synthesize PEGylated PDA NPs exhibiting high stability in physiological conditions as revealed by FTIR and DLS experiments respectively.
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Affiliation(s)
- Islam Zmerli
- Université Paris-Saclay, CNRS, Institut Galien Paris Sud, 92296, Châtenay-Malabry, France.
| | - Jean-Philippe Michel
- Université Paris-Saclay, CNRS, Institut Galien Paris Sud, 92296, Châtenay-Malabry, France.
| | - Ali Makky
- Université Paris-Saclay, CNRS, Institut Galien Paris Sud, 92296, Châtenay-Malabry, France.
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14
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Guerrero-Ferreira R, Taylor NM, Arteni AA, Kumari P, Mona D, Ringler P, Britschgi M, Lauer ME, Makky A, Verasdonck J, Riek R, Melki R, Meier BH, Böckmann A, Bousset L, Stahlberg H. Two new polymorphic structures of human full-length alpha-synuclein fibrils solved by cryo-electron microscopy. eLife 2019; 8:48907. [PMID: 31815671 PMCID: PMC6957273 DOI: 10.7554/elife.48907] [Citation(s) in RCA: 176] [Impact Index Per Article: 35.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 11/30/2019] [Indexed: 12/19/2022] Open
Abstract
Intracellular inclusions rich in alpha-synuclein are a hallmark of several neuropathological diseases including Parkinson's disease (PD). Previously, we reported the structure of alpha-synuclein fibrils (residues 1-121), composed of two protofibrils that are connected via a densely-packed interface formed by residues 50-57 (Guerrero-Ferreira, eLife 218;7:e36402). We here report two new polymorphic atomic structures of alpha-synuclein fibrils termed polymorphs 2a and 2b, at 3.0 Å and 3.4 Å resolution, respectively. These polymorphs show a radically different structure compared to previously reported polymorphs. The new structures have a 10 nm fibril diameter and are composed of two protofilaments which interact via intermolecular salt-bridges between amino acids K45, E57 (polymorph 2a) or E46 (polymorph 2b). The non-amyloid component (NAC) region of alpha-synuclein is fully buried by previously non-described interactions with the N-terminus. A hydrophobic cleft, the location of familial PD mutation sites, and the nature of the protofilament interface now invite to formulate hypotheses about fibril formation, growth and stability.
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Affiliation(s)
- Ricardo Guerrero-Ferreira
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Basel, Switzerland
| | - Nicholas Mi Taylor
- Structural Biology of Molecular Machines Group, Protein Structure & Function Programme, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ana-Andreea Arteni
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France.,Institut Fancois Jacob (MIRCen), CEA and Laboratory of Neurodegenerative Diseases, CNRS, Fontenay-Aux-Roses, France
| | - Pratibha Kumari
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Daniel Mona
- Roche Pharma Research and Early Development, Neuroscience and Rare Diseases Discovery and Translational Medicine Area, Neuroscience Discovery, Roche Innovation Center Basel, Basel, Switzerland
| | - Philippe Ringler
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Basel, Switzerland
| | - Markus Britschgi
- Roche Pharma Research and Early Development, Neuroscience and Rare Diseases Discovery and Translational Medicine Area, Neuroscience Discovery, Roche Innovation Center Basel, Basel, Switzerland
| | - Matthias E Lauer
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, Basel, Switzerland
| | - Ali Makky
- Institut Galien Paris-Sud, CNRS, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Joeri Verasdonck
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Roland Riek
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Ronald Melki
- Institut Fancois Jacob (MIRCen), CEA and Laboratory of Neurodegenerative Diseases, CNRS, Fontenay-Aux-Roses, France
| | - Beat H Meier
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Anja Böckmann
- Molecular Microbiology and Structural Biochemistry, Labex Ecofect, UMR 5086 CNRS, Université de Lyon, Lyon, France
| | - Luc Bousset
- Institut Fancois Jacob (MIRCen), CEA and Laboratory of Neurodegenerative Diseases, CNRS, Fontenay-Aux-Roses, France
| | - Henning Stahlberg
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Basel, Switzerland
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15
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Le-Minh V, Tran N, Makky A, Rosilio V, Taverna M, Smadja C. Capillary zone electrophoresis-native mass spectrometry for the quality control of intact therapeutic monoclonal antibodies. J Chromatogr A 2019; 1601:375-384. [DOI: 10.1016/j.chroma.2019.05.050] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 05/18/2019] [Accepted: 05/26/2019] [Indexed: 01/27/2023]
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16
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Massiot J, Rosilio V, Makky A. Photo-triggerable liposomal drug delivery systems: from simple porphyrin insertion in the lipid bilayer towards supramolecular assemblies of lipid–porphyrin conjugates. J Mater Chem B 2019; 7:1805-1823. [DOI: 10.1039/c9tb00015a] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Light-responsive liposomes are considered nowadays as one of the most promising nanoparticulate systems for the delivery and release of an active pharmaceutical ingredient (API) in a spatio-temporal manner.
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Affiliation(s)
- Julien Massiot
- Institut Galien Paris Sud
- Univ Paris-Sud
- CNRS
- Université Paris-Saclay
- 92296 Châtenay-Malabry
| | - Véronique Rosilio
- Institut Galien Paris Sud
- Univ Paris-Sud
- CNRS
- Université Paris-Saclay
- 92296 Châtenay-Malabry
| | - Ali Makky
- Institut Galien Paris Sud
- Univ Paris-Sud
- CNRS
- Université Paris-Saclay
- 92296 Châtenay-Malabry
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17
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Massiot J, Rosilio V, Ibrahim N, Yamamoto A, Nicolas V, Konovalov O, Tanaka M, Makky A. Frontispiece: Newly Synthesized Lipid–Porphyrin Conjugates: Evaluation of Their Self‐Assembling Properties, Their Miscibility with Phospholipids and Their Photodynamic Activity In Vitro. Chemistry 2018. [DOI: 10.1002/chem.201887265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Julien Massiot
- Institut Galien Paris Sud, Univ Paris-SudCNRS, Université Paris-Saclay 92296 Châtenay-Malabry France
| | - Véronique Rosilio
- Institut Galien Paris Sud, Univ Paris-SudCNRS, Université Paris-Saclay 92296 Châtenay-Malabry France
| | - Nada Ibrahim
- Institut Galien Paris Sud, Univ Paris-SudCNRS, Université Paris-Saclay 92296 Châtenay-Malabry France
| | - Akihisa Yamamoto
- Center for Integrative Medicine and PhysicsInstitute for Advanced StudyKyoto University 606-8501 Kyoto Japan
| | - Valérie Nicolas
- UMS IPSIT, Univ Paris-Sud, US 31 INSERMUMS 3679 CNRS 92290 Châtenay-Malabry France
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF) Grenoble Cedex 9 38053 France
| | - Motomu Tanaka
- Center for Integrative Medicine and PhysicsInstitute for Advanced StudyKyoto University 606-8501 Kyoto Japan
- Physical Chemistry of Biosystems, Physical Chemistry InstituteUniversity of Heidelberg 69120 Heidelberg Germany
| | - Ali Makky
- Institut Galien Paris Sud, Univ Paris-SudCNRS, Université Paris-Saclay 92296 Châtenay-Malabry France
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18
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Massiot J, Rosilio V, Ibrahim N, Yamamoto A, Nicolas V, Konovalov O, Tanaka M, Makky A. Newly Synthesized Lipid-Porphyrin Conjugates: Evaluation of Their Self-Assembling Properties, Their Miscibility with Phospholipids and Their Photodynamic Activity In Vitro. Chemistry 2018; 24:19179-19194. [PMID: 30362192 DOI: 10.1002/chem.201804865] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/23/2018] [Indexed: 01/19/2023]
Abstract
Lipid-porphyrin conjugates are considered nowadays as promising building blocks for the conception of supramolecular structures with multifunctional properties, required for efficient cancer therapy by photodynamic therapy (PDT). The synthesis of two new lipid-porphyrin conjugates coupling pheophorbide-a (Pheo-a), a photosensitizer derived from chlorophyll-a, to either chemically modified lyso-phosphatidylcholine (PhLPC) or egg lyso-sphingomyelin (PhLSM) is reported. The impact of the lipid backbone of these conjugates on their self-assembling properties, as well as on their physicochemical properties, including interfacial behavior at the air/buffer interface, fluorescence and absorption properties, thermotropic behavior, and incorporation rate in the membrane of liposomes were studied. Finally, their photodynamic activity was evaluated on esophageal squamous cell carcinoma (ESCC) and normal esophageal squamous epithelium cell lines. The liposome-like vesicles resulting from self-assembly of the pure conjugates were unstable and turned into aggregates with undefined structure within few days. However, both lipid-porphyrin conjugates could be efficiently incorporated in lipid vesicles, with higher loading rates than unconjugated Pheo-a. Interestingly, phototoxicity tests of free and liposome-incorporated lipid-porphyrin conjugates demonstrated a better selectivity in vitro to esophageal squamous cell carcinoma relative to normal cells.
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Affiliation(s)
- Julien Massiot
- Institut Galien Paris Sud, Univ Paris-Sud, CNRS, Université Paris-Saclay, 92296, Châtenay-Malabry, France
| | - Véronique Rosilio
- Institut Galien Paris Sud, Univ Paris-Sud, CNRS, Université Paris-Saclay, 92296, Châtenay-Malabry, France
| | - Nada Ibrahim
- Institut Galien Paris Sud, Univ Paris-Sud, CNRS, Université Paris-Saclay, 92296, Châtenay-Malabry, France
| | - Akihisa Yamamoto
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, 606-8501, Kyoto, Japan
| | - Valérie Nicolas
- UMS IPSIT, Univ Paris-Sud, US 31 INSERM, UMS 3679 CNRS, 92290, Châtenay-Malabry, France
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF), Grenoble Cedex 9, 38053, France
| | - Motomu Tanaka
- Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, 606-8501, Kyoto, Japan.,Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120, Heidelberg, Germany
| | - Ali Makky
- Institut Galien Paris Sud, Univ Paris-Sud, CNRS, Université Paris-Saclay, 92296, Châtenay-Malabry, France
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19
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Massiot J, Makky A, Di Meo F, Chapron D, Trouillas P, Rosilio V. Impact of lipid composition and photosensitizer hydrophobicity on the efficiency of light-triggered liposomal release. Phys Chem Chem Phys 2018; 19:11460-11473. [PMID: 28425533 DOI: 10.1039/c7cp00983f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Photo-triggerable liposomes are considered nowadays as promising drug delivery devices due to their potential to release encapsulated drugs in a spatial and temporal manner. In this work, we have investigated the photopermeation efficiency of three photosensitizers (PSs), namely verteporfin, pheophorbide a and m-THPP when incorporated into liposomes with well-defined lipid compositions (SOPC, DOPC or SLPC). By changing the nature of phospholipids and PSs, the illumination of the studied systems was shown to significantly alter their lipid bilayer properties via the formation of lipid peroxides. The system efficiency depends on the PS/phospholipid association, and the ability of the PS to peroxidize acyl chains. Our results demonstrated the possible use of these three clinically approved (or under investigation) PSs as potential candidates for photo-triggerable liposome conception.
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Affiliation(s)
- Julien Massiot
- Institut Galien Paris Sud, UMR 8612, Univ Paris-Sud, CNRS, Université Paris-Saclay, 5 rue J.B. Clément, F-92290 Châtenay-Malabry, France.
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20
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Matsuzaki T, Ito H, Chevyreva V, Makky A, Kaufmann S, Okano K, Kobayashi N, Suganuma M, Nakabayashi S, Yoshikawa HY, Tanaka M. Adsorption of galloyl catechin aggregates significantly modulates membrane mechanics in the absence of biochemical cues. Phys Chem Chem Phys 2018; 19:19937-19947. [PMID: 28721420 DOI: 10.1039/c7cp02771k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Physical interactions of four major green tea catechin derivatives with cell membrane models were systemically investigated. Catechins with the galloyl moiety caused the aggregation of small unilamellar vesicles and an increase in the surface pressure of lipid monolayers, while those without did not. Differential scanning calorimetry revealed that, in a low concentration regime (≤10 μM), catechin molecules are not significantly incorporated into the hydrophobic core of lipid membranes as substitutional impurities. Partition coefficient measurements revealed that the galloyl moiety of catechin and the cationic quaternary amine of lipids dominate the catechin-membrane interaction, which can be attributed to the combination of electrostatic and cation-π interactions. Finally, we shed light on the mechanical consequence of catechin-membrane interactions using the Fourier-transformation of the membrane fluctuation. Surprisingly, the incubation of cell-sized vesicles with 1 μM galloyl catechins, which is comparable to the level in human blood plasma after green tea consumption, significantly increased the bending stiffness of the membranes by a factor of more than 60, while those without the galloyl moiety had no detectable influence. Atomic force microscopy and circular dichroism spectroscopy suggest that the membrane stiffening is mainly attributed to the adsorption of galloyl catechin aggregates to the membrane surfaces. These results contribute to our understanding of the physical and thus the generic functions of green tea catechins in therapeutics, such as cancer prevention.
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Affiliation(s)
- Takahisa Matsuzaki
- Department of Chemistry, Saitama University, Sakura-ku, Saitama, 338-8570, Japan.
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21
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Korytowski A, Abuillan W, Amadei F, Makky A, Gumiero A, Sinning I, Gauss A, Stremmel W, Tanaka M. Accumulation of phosphatidylcholine on gut mucosal surface is not dominated by electrostatic interactions. Biochim Biophys Acta Biomembr 2017; 1859:959-965. [PMID: 28212861 DOI: 10.1016/j.bbamem.2017.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 01/19/2017] [Accepted: 02/11/2017] [Indexed: 02/07/2023]
Abstract
The accumulation of phosphatidylcholine (PC) in the intestinal mucus layer is crucial for the protection of colon epithelia from the bacterial attack. It has been reported that the depletion of PC is a distinct feature of ulcerative colitis. Here we addressed the question how PC interacts with its binding proteins, the mucins, which may establish the hydrophobic barrier against colonic microbiota. In the first step, the interactions of dioleoylphosphatidylcholine (DOPC) with two mucin preparations from porcine stomach, have been studied using dynamic light scattering, zeta potential measurement, and Langmuir isotherms, suggesting that mucin binds to the surface of DOPC vesicles. The enthalpy of mucin-PC interaction could be determined by isothermal titration calorimetry. The high affinity to PC found for both mucin types seems reasonable, as they mainly consist of mucin 2, a major constituent of the flowing mucus. Moreover, by the systematic variation of net charges, we concluded that the zwitterionic DOPC has the strongest binding affinity that cannot be explained within the electrostatic interactions between charged molecules.
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Affiliation(s)
- Agatha Korytowski
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Wasim Abuillan
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Federico Amadei
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Ali Makky
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Andrea Gumiero
- Heidelberg University Biochemistry Center (BZH), D69120 Heidelberg, Germany
| | - Irmgard Sinning
- Heidelberg University Biochemistry Center (BZH), D69120 Heidelberg, Germany
| | - Annika Gauss
- Department of Internal Medicine IV, University Clinics of Heidelberg, D69120 Heidelberg, Germany
| | - Wolfgang Stremmel
- Department of Internal Medicine IV, University Clinics of Heidelberg, D69120 Heidelberg, Germany.
| | - Motomu Tanaka
- Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany; Institute for Integrated Cell-Material Science (WPI iCeMS), Kyoto University, 606-8501 Kyoto, Japan.
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22
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Makky A, Bousset L, Polesel-Maris J, Melki R. Nanomechanical properties of distinct fibrillar polymorphs of the protein α-synuclein. Sci Rep 2016; 6:37970. [PMID: 27901068 PMCID: PMC5128817 DOI: 10.1038/srep37970] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 11/03/2016] [Indexed: 11/17/2022] Open
Abstract
Alpha-synuclein (α-Syn) is a small presynaptic protein of 140 amino acids. Its pathologic intracellular aggregation within the central nervous system yields protein fibrillar inclusions named Lewy bodies that are the hallmarks of Parkinson's disease (PD). In solution, pure α-Syn adopts an intrinsically disordered structure and assembles into fibrils that exhibit considerable morphological heterogeneity depending on their assembly conditions. We recently established tightly controlled experimental conditions allowing the assembly of α-Syn into highly homogeneous and pure polymorphs. The latter exhibited differences in their shape, their structure but also in their functional properties. We have conducted an AFM study at high resolution and performed a statistical analysis of fibrillar α-Syn shape and thermal fluctuations to calculate the persistence length to further assess the nanomechanical properties of α-Syn polymorphs. Herein, we demonstrated quantitatively that distinct polymorphs made of the same protein (wild-type α-Syn) show significant differences in their morphology (height, width and periodicity) and physical properties (persistence length, bending rigidity and axial Young's modulus).
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Affiliation(s)
- Ali Makky
- Institut Galien Paris-Sud, CNRS, Univ. Paris-Sud, University Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Luc Bousset
- Paris-Saclay Institute of Neuroscience, Centre National de la Recherche Scientifique, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Jérôme Polesel-Maris
- Luxembourg Institute of Science and Technology (LIST), Materials Research and Technology (MRT), L-4422 Belvaux, Luxembourg
| | - Ronald Melki
- Paris-Saclay Institute of Neuroscience, Centre National de la Recherche Scientifique, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
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23
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Korytowski A, Abuillan W, Makky A, Konovalov O, Tanaka M. Impact of Lipid Oxidization on Vertical Structures and Electrostatics of Phospholipid Monolayers Revealed by Combination of Specular X-ray Reflectivity and Grazing-Incidence X-ray Fluorescence. J Phys Chem B 2015; 119:9787-94. [PMID: 26125947 DOI: 10.1021/acs.jpcb.5b04451] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The influence of phospholipid oxidization of floating monolayers on the structure perpendicular to the global plane and on the density profiles of ions near the lipid monolayer has been investigated by a combination of grazing incidence X-ray fluorescence (GIXF) and specular X-ray reflectivity (XRR). Systematic variation of the composition of the floating monolayers unravels changes in the thickness, roughness and electron density of the lipid monolayers as a function of molar fraction of oxidized phospholipids. Simultaneous GIXF measurements enable one to qualitatively determine the element-specific density profiles of monovalent (K(+) or Cs(+)) and divalent ions (Ca(2+)) in the vicinity of the interface in the presence and absence of two types of oxidized phospholipids (PazePC and PoxnoPC) with high spatial accuracy (±5 Å). We found the condensation of Ca(2+) near carboxylated PazePC was more pronounced compared to PoxnoPC with an aldehyde group. In contrast, the condensation of monovalent ions could hardly be detected even for pure oxidized phospholipid monolayers. Moreover, pure phospholipid monolayers exhibited almost no ion specific condensation near the interface. The quantitative studies with well-defined floating monolayers revealed how the elevation of lipid oxidization level alters the structures and functions of cell membranes.
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Affiliation(s)
- Agatha Korytowski
- †Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120 Heidelberg, Germany
| | - Wasim Abuillan
- †Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120 Heidelberg, Germany
| | - Ali Makky
- †Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120 Heidelberg, Germany.,‡Institut Galien Paris Sud, Faculté de Pharmacie-Université Paris-Sud, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Oleg Konovalov
- §European Synchrotron Radiation Facility (ESRF), Grenoble Cedex 9 38053, France
| | - Motomu Tanaka
- †Physical Chemistry of Biosystems, Physical Chemistry Institute, University of Heidelberg, 69120 Heidelberg, Germany.,∥Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, 606-8501 Kyoto, Japan
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Abstract
The oxidization of glycerophospholipids in cell membranes due to aging and environmental stresses may cause a variety of pathological and physiological consequences. A variety of oxidized phospholipid products (OxPl) are produced by the chemical oxidization of unsaturated hydrocarbon chains, which would significantly change the physicochemical properties of cell membranes. In this work, we constructed cell membrane models in the absence and presence of two stable oxidized lipid products and investigated their impact on physical properties of supported membranes using quartz crystal microbalance with dissipation (QCM-D) and high-energy X-ray reflectivity (XRR). Our experimental findings suggest that the lipid oxidization up to 20 mol % leads to the rupture of vesicles right after the adsorption. Our XRR analysis unravels the membrane thinning and the decrease in the lateral ordering of lipids, which can be explained by the decrease in the lateral packing of hydrocarbon chains. Further studies on mechanics of membranes incorporating oxidized lipids can be attributed to the decrease in the bending rigidity and the increase in the permeability.
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Affiliation(s)
- Ali Makky
- †Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany
| | - Motomu Tanaka
- †Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D69120 Heidelberg, Germany.,‡Institute for Toxicology and Genetics, Karlsruhe Institute for Technology, D76021 Karlsruhe, Germany.,§Institute for Integrated Cell-Material Sciences (WPI iCeMS), Kyoto University, 606-8501 Kyoto, Japan
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Frenkel N, Makky A, Sudji IR, Wink M, Tanaka M. Mechanistic Investigation of Interactions between Steroidal Saponin Digitonin and Cell Membrane Models. J Phys Chem B 2014; 118:14632-9. [DOI: 10.1021/jp5074939] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nataliya Frenkel
- Institute for
Toxicology and Genetics, Karlsruhe Institute for Technology, D76021, Karlsruhe, Germany
| | | | | | | | - Motomu Tanaka
- Institute for
Toxicology and Genetics, Karlsruhe Institute for Technology, D76021, Karlsruhe, Germany
- Institute for
Integrated Cell-Material Sciences (WPI iCeMS), Kyoto University, 606-8501 Kyoto, Japan
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Makky A, Viel P, Chen SWW, Berthelot T, Pellequer JL, Polesel-Maris J. Piezoelectric tuning fork probe for atomic force microscopy imaging and specific recognition force spectroscopy of an enzyme and its ligand. J Mol Recognit 2014; 26:521-31. [PMID: 24089359 DOI: 10.1002/jmr.2294] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/13/2013] [Accepted: 06/17/2013] [Indexed: 11/12/2022]
Abstract
Piezoelectric quartz tuning fork has drawn the attention of many researchers for the development of new atomic force microscopy (AFM) self-sensing probes. However, only few works have been done for soft biological materials imaging in air or aqueous conditions. The aim of this work was to demonstrate the efficiency of the AFM tuning fork probe to perform high-resolution imaging of proteins and to study the specific interaction between a ligand and its receptor in aqueous media. Thus, a new kind of self-sensing AFM sensor was introduced to realize imaging and biochemical specific recognition spectroscopy of glucose oxidase enzyme using a new chemical functionalization procedure of the metallic tips based on the electrochemical reduction of diazonium salt. This scanning probe as well as the functionalization strategy proved to be efficient respectively for the topography and force spectroscopy of soft biological materials in buffer conditions.
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Affiliation(s)
- Ali Makky
- CEA, IRAMIS, Service de Physique et Chimie des Surfaces et Interfaces, Gif-sur-Yvette, France
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Rosilio V, Makky A, Michel JP, Maillard P. [Interfacial behaviour of glycoconjugated tetraphenylporphyrins and their interaction with biomimetic models of the cell membrane]. Ann Pharm Fr 2012; 70:219-26. [PMID: 22818264 DOI: 10.1016/j.pharma.2012.04.002] [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] [Received: 01/24/2012] [Revised: 04/10/2012] [Accepted: 04/20/2012] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Porphyrins are photosensitizers usable in photodynamic therapy. Although these molecules are clinically effective, their low water solubility and their lack of specificity are major drawbacks to their development. Our study was aimed at analysing the interfacial behaviour of glycoconjugated tetraphenylporphyrins newly synthesized at the Curie Institute, and their interaction with model membranes bearing a specific lectin mimicking a mannose membrane receptor in retinoblastoma. MATERIAL AND METHODS The interfacial behaviour of the porphyrins was analysed by surface pressure measurements, and their specific interaction with the lectin, by dynamic light scattering (liposomes) and the quartz crystal microbalance technique (supported bilayers). RESULTS All porphyrin derivatives were able to organize at the air/liquid interface. The dendrimeric compounds formed more stable monolayers than the others, and generally showed good mixing properties with the phospholipid used for liposome preparation. In the presence of concanavalin A, the porphyrin bearing-liposomes behaved differently depending on the nature (mannosylated or not) of the porphyrins. DISCUSSION The interfacial behaviour of the tetraphenylporphyrins is directly related to the orientation of the tetrapyrrolic macrocycle controlled by the grafted groups. Incorporated into a liposome bilayer, glycodendrimeric porphyrins expose their sugar moieties at the vesicle surface. The spacer length plays a crucial role by increasing sugars freedom and enhancing glycosylated liposomes interaction with the lectin. CONCLUSION Compared to the other studied compounds, the glycodendrimeric porphyrins seem very promising compounds and are now evaluated on cell cultures.
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Affiliation(s)
- V Rosilio
- UMR CNRS 8612, laboratoire de physicochimie des surfaces, faculté de pharmacie, université Paris-Sud 11, 5, rue J.-B.-Clément, 92296 Châtenay-Malabry cedex, France.
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Ballut S, Makky A, Chauvin B, Michel JP, Kasselouri A, Maillard P, Rosilio V. Tumor targeting in photodynamic therapy. From glycoconjugated photosensitizers to glycodendrimeric one. Concept, design and properties. Org Biomol Chem 2012; 10:4485-95. [PMID: 22569817 DOI: 10.1039/c2ob25181g] [Citation(s) in RCA: 39] [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: 01/19/2023]
Abstract
In this paper, we discuss the evolution over the last 15 years in the Curie Institute of the concept, the development of the design and some properties of glycoconjugated photosensitizers with the aim to optimize the tumor targeting in photodynamic therapy. By this research, we have shown that specific interactions between a mannose-lectin and trimannosylglycodendrimeric porphyrins contributed to a larger extent than non-specific ones to the overall interaction of a glycosylated tetraarylporphyrin with a membrane. The studies of in vitro photocytotoxicity showed the relevance of the global geometry of the photosensitizer, the number and position of the linked glycopyranosyl groups on the chromophore and their lipophilicity. The two best compounds appeared to be porphyrins bearing three α-glycosyl groups on para-position of meso-phenyl via a flexible linker. Compound bearing α-manosyl moieties was evaluated successfully in two in vivo xenografted animal models of human retinoblastoma and colorectal cancers. Conversely, the presence on the chromophore of three sugars via a glycodendrimeric moiety induced a potential cluster effect, but decreased the in vitro photoefficiency despite a good affinity for a mannose-lectin.
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Affiliation(s)
- Séverine Ballut
- Institut Curie, Centre de Recherche, Bât 110-112, Orsay, F-91405, France
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Makky A, Michel J, Maillard P, Rosilio V. Biomimetic liposomes and planar supported bilayers for the assessment of glycodendrimeric porphyrins interaction with an immobilized lectin. Biochimica et Biophysica Acta (BBA) - Biomembranes 2011; 1808:656-66. [DOI: 10.1016/j.bbamem.2010.11.028] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Revised: 11/18/2010] [Accepted: 11/22/2010] [Indexed: 10/18/2022]
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Makky A, Michel JP, Kasselouri A, Briand E, Maillard P, Rosilio V. Evaluation of the specific interactions between glycodendrimeric porphyrins, free or incorporated into liposomes, and concanavalin A by fluorescence spectroscopy, surface pressure, and QCM-D measurements. Langmuir 2010; 26:12761-12768. [PMID: 20614896 DOI: 10.1021/la101260t] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In photodynamic therapy, the specificity of a photosensitizer and its penetration into tumor cells are crucial. We have analyzed the ability of newly synthesized meso-(tetraphenyl)porphyrins to be recognized by a model of mannose-specific proteins overexpressed at the surface of retinoblastoma cells. The specific interaction of porphyrin with Con A was studied by surface pressure measurements, fluorescence spectroscopy, dynamic light scattering, and QCM-D. The extent of porphyrins binding to Con A was highly dependent upon their chemical structure. Glycodendrimeric porphyrins showed the higher binding constant to Con A. The length of the spacer separating the sugar from the tetrapyrrolic ring appeared to be crucial in controlling the interaction of the compounds with the lectin in solution or immobilized onto a solid substrate. The methodology used proved to be efficient for the selection of potentially active compounds. The glycodendrimeric porphyrins, especially the derivative having the longer spacer, interacted more significantly with the lectin than the compound devoid of any sugar.
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Affiliation(s)
- A Makky
- Univ Paris-Sud 11, UMR 8612, Laboratoire de Physico-Chimie des Surfaces, IFR 141, F-92296 Châtenay-Malabry, France
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Makky A, Michel JP, Ballut S, Kasselouri A, Maillard P, Rosilio V. Effect of cholesterol and sugar on the penetration of glycodendrimeric phenylporphyrins into biomimetic models of retinoblastoma cells membranes. Langmuir 2010; 26:11145-11156. [PMID: 20527940 DOI: 10.1021/la101040q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Photodynamic therapy (PDT) is considered one efficient treatment against retinoblastoma. The specificity of a photosensitizer and its penetration into cancerous cells are crucial for achieving tumor necrosis. The selection of photosensitizers such as porphyrin derivatives by tumor cells thus depends to a large extent on their ability to interact with the biological membrane. In this work, we have studied by surface pressure measurements and fluorescence spectroscopy the interaction between three newly synthesized dendrimeric phenylporphyrins and monolayers or liposomes with increasing cholesterol content mimicking the retinoblastoma cell membrane. The morphology of phospholipid-cholesterol-porphyrin mixed monolayers was also analyzed by Brewster angle microscopy. The results showed that the increase in cholesterol content in the model membranes had almost no effect on the effective penetration of the drugs into the lipid layers. Conversely, the chemical structure of the glycodendrimeric phenylporphyrins and the presence of sugar moieties especially appeared to play a crucial role. Although the non-glycoconjugated phenylporphyrin penetrated to a greater extent than glycodendrimeric ones into the liposome membrane, this could be achieved at a high lipid/porphyrin ratio only. Glycodendrimeric porphyrins exhibited improved surface properties compared to the non-glycoconjugated derivative and could penetrate into lipid layers even at low lipid/porphyrin ratios and high surface pressures. Our work highlights the role in the passive diffusion of porphyrins into biomimetic cancer cell membranes, of complex interactions among the lipid molecules, the sugar moieties, and the hydrophobic macrocycle of the porphyrins.
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Affiliation(s)
- A Makky
- Univ Paris-Sud 11, UMR 8612, Laboratoire de Physico-chimie des Surfaces, IFR 141, F-92296 Châtenay-Malabry cedex, France
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Ballut S, Makky A, Loock B, Michel JP, Maillard P, Rosilio V. New strategy for targeting of photosensitizers. Synthesis of glycodendrimeric phenylporphyrins, incorporation into a liposome membrane and interaction with a specific lectin. Chem Commun (Camb) 2008:224-6. [PMID: 19099076 DOI: 10.1039/b816128c] [Citation(s) in RCA: 52] [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: 11/21/2022]
Abstract
Two glycodendrimeric phenylporphyrins were synthesized and their interaction with phospholipids was studied at the air-water interface and in liposome bilayers; such liposomes bearing glycodendrimeric porphyrin could constitute an efficient carrier for drug targeting in photodynamic therapy.
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Affiliation(s)
- Séverine Ballut
- UMR 176 CNRS/Institut Curie, Institut Curie, Bât 110, Univ. Paris-Sud, F-91405, Orsay, France
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