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Bretel G, Tran DT, Morandi G, Lapinte V, Marais S, Hespel L. Synthesis of an original oxazoline based monomer containing a photosensitive azobenzene moiety and investigation of the behavior in solid state, in aqueous and vapor media of a photo and thermo-responsive polyoxazoline copolymer. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125812] [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: 03/05/2023]
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Desbois N, Osterloh WR, Sabat D, Monot C, Brandès S, Meyer M, Chaar C, Hespel L, Lebrun L, Baati R, Estour F, Gros CP. Cobalt tris(4-vinylphenyl)corrole: out of the frying pan into the polymer. Chem Commun (Camb) 2023; 59:2098-2101. [PMID: 36723238 DOI: 10.1039/d2cc06872a] [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: 01/19/2023]
Abstract
A novel cobalt corrole bearing 4-vinylphenyl groups at the 5,10,15-meso-positions of the macrocycle has been synthesized from tris(4-bromophenyl)corrole using a Suzuki coupling reaction. The spectral and electrochemical properties are reported in CH2Cl2 along with its ability to form a highly stable six-coordinate complex and cross-linked corrole-based polymer in a 59% yield.
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Affiliation(s)
- Nicolas Desbois
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
| | - W Ryan Osterloh
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
| | - Dimitri Sabat
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
| | - Camille Monot
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
| | - Stéphane Brandès
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
| | - Michel Meyer
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
| | - Capucine Chaar
- Normandie Univ., UNIROUEN, INSA Rouen, CNRS, COBRA UMR 6014, 76000, Rouen, France.
| | - Louise Hespel
- Normandie Univ., UNIROUEN, INSA Rouen, CNRS, PBS, 76000, Rouen, France
| | - Laurent Lebrun
- Normandie Univ., UNIROUEN, INSA Rouen, CNRS, PBS, 76000, Rouen, France
| | - Rachid Baati
- Université de Strasbourg, ICPEES, UMR CNRS 7515, 67087, Strasbourg, France
| | - François Estour
- Normandie Univ., UNIROUEN, INSA Rouen, CNRS, COBRA UMR 6014, 76000, Rouen, France.
| | - Claude P Gros
- Université Bourgogne Franche-Comté, ICMUB UMR CNRS 6302, Dijon, Cedex, 21078, France.
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Meye Biyogo A, Hespel L, Humblot V, Lebrun L, Estour F. Cellulose fibers modification through metal-free click chemistry for the elaboration of versatile functional surfaces. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109866] [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: 11/29/2022]
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Hespel L, Dupré de Baubigny J, Lalanne P, de Beco S, Coppey M, Villard C, Humblot V, Marie E, Tribet C. Redox-Triggered Control of Cell Adhesion and Deadhesion on Poly(lysine)- g-poly(ethylene oxide) Adlayers. ACS Appl Bio Mater 2019; 2:4367-4376. [DOI: 10.1021/acsabm.9b00601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Louise Hespel
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Julien Dupré de Baubigny
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Pierre Lalanne
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Simon de Beco
- Laboratoire Physico Chimie, Institut Curie, PSL Université, Sorbonne Université, CNRS UMR168, F-75005 Paris, France
| | - Mathieu Coppey
- Laboratoire Physico Chimie, Institut Curie, PSL Université, Sorbonne Université, CNRS UMR168, F-75005 Paris, France
| | - Catherine Villard
- Laboratoire Physico Chimie, Institut Curie, PSL Université, Sorbonne Université, CNRS UMR168, F-75005 Paris, France
| | - Vincent Humblot
- Laboratoire Réactivité de Surface, Sorbonne Université, CNRS UMR 7197, 4 Place Jussieu, F-75005 Paris, France
| | - Emmanuelle Marie
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
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Pauty J, Usuba R, Cheng IG, Hespel L, Takahashi H, Kato K, Kobayashi M, Nakajima H, Lee E, Yger F, Soncin F, Matsunaga YT. A Vascular Endothelial Growth Factor-Dependent Sprouting Angiogenesis Assay Based on an In Vitro Human Blood Vessel Model for the Study of Anti-Angiogenic Drugs. EBioMedicine 2018; 27:225-236. [PMID: 29289530 PMCID: PMC5828365 DOI: 10.1016/j.ebiom.2017.12.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/06/2017] [Accepted: 12/14/2017] [Indexed: 10/26/2022] Open
Abstract
Angiogenesis is the formation of new capillaries from pre-existing blood vessels and participates in proper vasculature development. In pathological conditions such as cancer, abnormal angiogenesis takes place. Angiogenesis is primarily carried out by endothelial cells, the innermost layer of blood vessels. The vascular endothelial growth factor-A (VEGF-A) and its receptor-2 (VEGFR-2) trigger most of the mechanisms activating and regulating angiogenesis, and have been the targets for the development of drugs. However, most experimental assays assessing angiogenesis rely on animal models. We report an in vitro model using a microvessel-on-a-chip. It mimics an effective endothelial sprouting angiogenesis event triggered from an initial microvessel using a single angiogenic factor, VEGF-A. The angiogenic sprouting in this model is depends on the Notch signaling, as observed in vivo. This model enables the study of anti-angiogenic drugs which target a specific factor/receptor pathway, as demonstrated by the use of the clinically approved sorafenib and sunitinib for targeting the VEGF-A/VEGFR-2 pathway. Furthermore, this model allows testing simultaneously angiogenesis and permeability. It demonstrates that sorafenib impairs the endothelial barrier function, while sunitinib does not. Such in vitro human model provides a significant complimentary approach to animal models for the development of effective therapies.
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Affiliation(s)
- Joris Pauty
- Center for International Research on Integrative Biomedical Systems (CIBiS), Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; LIMMS/CNRS-IIS UMI 2820, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; CNRS/IIS/COL/Université Lille 1 SMMiL-E project, CNRS Délégation Nord-Pas de Calais et Picardie, 2 rue de Canonniers, Lille, Cedex 59046, France
| | - Ryo Usuba
- Center for International Research on Integrative Biomedical Systems (CIBiS), Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Irene Gayi Cheng
- Department of Bioengineering, Clemson University, 118 Engineering Service Dr., Clemson, SC 29634, USA
| | - Louise Hespel
- Ecole Normale Supérieure-PSL Research University, Département de Chimie, Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 8640 PASTEUR, 24 rue Lhomond, 75005 Paris, France
| | - Haruko Takahashi
- Center for International Research on Integrative Biomedical Systems (CIBiS), Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Keisuke Kato
- R&D Department 1, SCREEN Holdings Co., Ltd., 322 Furukawa-cho, Hazukashi, Fushimi-ku, Kyoto 612-8486, Japan
| | - Masayoshi Kobayashi
- R&D Department 1, SCREEN Holdings Co., Ltd., 322 Furukawa-cho, Hazukashi, Fushimi-ku, Kyoto 612-8486, Japan
| | - Hiroyuki Nakajima
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan
| | - Eujin Lee
- Center for International Research on Integrative Biomedical Systems (CIBiS), Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Florian Yger
- LAMSADE, CNRS UMR 7243, Université Paris-Dauphine, PSL Research University, 75016 Paris, France
| | - Fabrice Soncin
- CNRS/IIS/COL/Université Lille 1 SMMiL-E project, CNRS Délégation Nord-Pas de Calais et Picardie, 2 rue de Canonniers, Lille, Cedex 59046, France; Université Lille, CNRS, Institut Pasteur de Lille, UMR 8161 - M3T, F-59000 Lille, France.
| | - Yukiko T Matsunaga
- Center for International Research on Integrative Biomedical Systems (CIBiS), Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; LIMMS/CNRS-IIS UMI 2820, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; CNRS/IIS/COL/Université Lille 1 SMMiL-E project, CNRS Délégation Nord-Pas de Calais et Picardie, 2 rue de Canonniers, Lille, Cedex 59046, France.
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Hespel L, Morandi G, Grossel M, Lecamp L, Picton L, Burel F. Synthesis of lipid-b-poly(2-isopropyl-2-oxazoline) and successive study of pH- and thermo-sensitive mixed micelles by combination with lipid-b-poly(acrylic acid). Polym Chem 2014. [DOI: 10.1039/c4py00062e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Hespel L, Mainguy S, Greffet JJ. Theoretical and experimental investigation of the extinction in a dense distribution of particles: nonlocal effects. J Opt Soc Am A Opt Image Sci Vis 2001; 18:3072-3076. [PMID: 11760204 DOI: 10.1364/josaa.18.003072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report experimental measurements of the extinction in a suspension of dielectric spheres. We find that the model originally introduced by Keller is in good agreement with the data provided that nonlocal effects are properly taken into account. We also find that the simple criterion establishing the regime of independent scattering previously introduced is not consistent with our data.
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Affiliation(s)
- L Hespel
- Centre d'Etudes Scientifiques et Techniques d'Aquitaine, Commissariat à l'Energie Atomique, BP 2, 33114 Le Barp, France.
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Hespel L, Delfour A, Guillame B. Mie Light-Scattering Granulometer with an Adaptive Numerical Filtering Method. II. Experiments. Appl Opt 2001; 40:974-985. [PMID: 18357082 DOI: 10.1364/ao.40.000974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A nephelometer is presented that theoretically requires no absolute calibration. This instrument is used for determining the particle-size distribution of various scattering media (aerosols, fogs, rocket exhausts, engine plumes, and the like) from angular static light-scattering measurements. An inverse procedure is used, which consists of a least-squares method and a regularization scheme based on numerical filtering. To retrieve the distribution function one matches the experimental data with theoretical patterns derived from Mie theory. The main principles of the inverse method are briefly presented, and the nephelometer is then described with the associated partial calibration procedure. Finally, the whole granulometer system (inverse method and nephelometer) is validated by comparison of measurements of scattering media with calibrated monodisperse or known size distribution functions.
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Hespel L, Delfour A. Mie light-scattering granulometer with adaptive numerical filtering. I. Theory. Appl Opt 2000; 39:6897-6917. [PMID: 18354703 DOI: 10.1364/ao.39.006897] [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] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A search procedure based on a least-squares method including a regularization scheme constructed from numerical filtering is presented. This method, with the addition of a nephelometer, can be used to determine the particle-size distributions of various scattering media (aerosols, fogs, rocket exhausts, motor plumes) from angular static light-scattering measurements. For retrieval of the distribution function, the experimental data are matched with theoretical patterns derived from Mie theory. The method is numerically investigated with simulated data, and the performance of the inverse procedure is evaluated. The results show that the retrieved distribution function is quite reliable, even for strong levels of noise.
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Affiliation(s)
- L Hespel
- Département d'Optique Théorique et Appliquée, Office National d'Etudes et de Recherches Aérospatiales, 2 avenue E Belin, BP 4055, 31055 Toulouse, France.
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