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Bartkowiak A, Matyszewska D, Krzak A, Zaborowska M, Broniatowski M, Bilewicz R. Incorporation of simvastatin into lipid membranes: Why deliver a statin in form of inclusion complex with hydrophilic cyclodextrin. Colloids Surf B Biointerfaces 2021; 204:111784. [PMID: 33984617 DOI: 10.1016/j.colsurfb.2021.111784] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/31/2021] [Accepted: 04/20/2021] [Indexed: 12/31/2022]
Abstract
In this work, the effects of simvastatin (SIM), (2-hydroxypropyl)-β-cyclodextrin (HPβCD) and their complex (SIM:HPβCD) on the structure and properties of lipid membranes were investigated for the first time by Langmuir technique combined with PM-IRRAS spectroscopy. An improved understanding of the differences of the interactions between free SIM, and SIM in the form of an inclusion complex with HPβCD with the lipid membrane will improve the development of preparation methods for in vivo applications. Monolayers of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), cholesterol (Chol) and their mixture DMPC:Chol (7:3) served as simple models of one leaflet of the cell membrane. The penetration of well-organized lipid layers by simvastatin lead to their fluidization but the extent of this unwanted effect was smaller when the drug was delivered in the form of the SIM:HPβCD complex. Surface pressure vs. time dependencies showed that the drug encapsulated with cyclodextrin dissociated from the complex upon contact with the lipid layer and the weak interactions between the exterior polar part of the HPβCD and the polar headgroups of the lipid layer facilitated smooth incorporation of the released lipophilic drug into the membrane. At a longer time-scale, the HPβCD ligand released from the complex removed some cholesterol, but not DMPC, from the lipid layer, hence, similarly to the enzyme inhibiting action of statins - it lead to the decrease of the amount of cholesterol in the membrane. Delivery of simvastatin in the form of an inclusion complex with HPβCD is proposed as an approach improving its bioavailability in the cholesterol-lowering therapies.
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Affiliation(s)
| | - Dorota Matyszewska
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Agata Krzak
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | | | - Marcin Broniatowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
| | - Renata Bilewicz
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland; Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland.
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2
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Measuring protein insertion areas in lipid monolayers by fluorescence correlation spectroscopy. Biophys J 2021; 120:1333-1342. [PMID: 33609496 DOI: 10.1016/j.bpj.2021.02.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 01/21/2021] [Accepted: 02/10/2021] [Indexed: 11/22/2022] Open
Abstract
Membrane insertion of protein domains is an important step in many membrane remodeling processes, for example, in vesicular transport. The membrane area taken up by the protein insertion influences the protein binding affinity as well as the mechanical stress induced in the membrane and thereby its curvature. To our knowledge, this is the first optical measurement of this quantity on a system in equilibrium with direct determination of the number of inserted protein and no further assumptions concerning the binding thermodynamics. Whereas macroscopic total area changes in lipid monolayers are typically measured on a Langmuir film balance, finding the number of inserted proteins without perturbing the system and quantitating any small area changes has posed a challenge. Here, we address both issues by performing two-color fluorescence correlation spectroscopy directly on the monolayer. With a fraction of the protein being fluorescently labeled, the number of inserted proteins is determined in situ without resorting to invasive techniques such as collecting the monolayer by aspiration. The second color channel is exploited to monitor a small fraction of labeled lipids to determine the total area increase. Here, we use this method to determine the insertion area per molecule of Sar1, a protein of the COPII complex, which is involved in transport vesicle formation. Sar1 has an N-terminal amphipathic helix, which is responsible for membrane binding and curvature generation. An insertion area of (3.4 ± 0.8) nm2 was obtained for Sar1 in monolayers from a lipid mixture typically used in COPII reconstitution experiments, in good agreement with the expected insertion area of the Sar1 amphipathic helix. By using the two-color approach, determining insertion areas relies only on local fluorescence measurements. No macroscopic area measurements are needed, giving the method the potential to also be applied to laterally heterogeneous monolayers and bilayers.
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3
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Nitenberg M, Bénarouche A, Maniti O, Marion E, Marsollier L, Géan J, Dufourc EJ, Cavalier JF, Canaan S, Girard-Egrot AP. The potent effect of mycolactone on lipid membranes. PLoS Pathog 2018; 14:e1006814. [PMID: 29320578 PMCID: PMC5779694 DOI: 10.1371/journal.ppat.1006814] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/23/2018] [Accepted: 12/14/2017] [Indexed: 12/15/2022] Open
Abstract
Mycolactone is a lipid-like endotoxin synthesized by an environmental human pathogen, Mycobacterium ulcerans, the causal agent of Buruli ulcer disease. Mycolactone has pleiotropic effects on fundamental cellular processes (cell adhesion, cell death and inflammation). Various cellular targets of mycolactone have been identified and a literature survey revealed that most of these targets are membrane receptors residing in ordered plasma membrane nanodomains, within which their functionalities can be modulated. We investigated the capacity of mycolactone to interact with membranes, to evaluate its effects on membrane lipid organization following its diffusion across the cell membrane. We used Langmuir monolayers as a cell membrane model. Experiments were carried out with a lipid composition chosen to be as similar as possible to that of the plasma membrane. Mycolactone, which has surfactant properties, with an apparent saturation concentration of 1 μM, interacted with the membrane at very low concentrations (60 nM). The interaction of mycolactone with the membrane was mediated by the presence of cholesterol and, like detergents, mycolactone reshaped the membrane. In its monomeric form, this toxin modifies lipid segregation in the monolayer, strongly affecting the formation of ordered microdomains. These findings suggest that mycolactone disturbs lipid organization in the biological membranes it crosses, with potential effects on cell functions and signaling pathways. Microdomain remodeling may therefore underlie molecular events, accounting for the ability of mycolactone to attack multiple targets and providing new insight into a single unifying mechanism underlying the pleiotropic effects of this molecule. This membrane remodeling may act in synergy with the other known effects of mycolactone on its intracellular targets, potentiating these effects.
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Affiliation(s)
- Milène Nitenberg
- Univ. Lyon, Université Lyon 1, CNRS, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS—UMR 5246, GEMBAS team, Lyon, France
| | | | - Ofelia Maniti
- Univ. Lyon, Université Lyon 1, CNRS, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS—UMR 5246, GEMBAS team, Lyon, France
| | - Estelle Marion
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Laurent Marsollier
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Julie Géan
- Univ. Bordeaux, CNRS, Bordeaux INP, Chemistry and Biology of Membranes and Nano-objects, CBMN UMR 5248, Pessac, France
| | - Erick J. Dufourc
- Univ. Bordeaux, CNRS, Bordeaux INP, Chemistry and Biology of Membranes and Nano-objects, CBMN UMR 5248, Pessac, France
| | - Jean-François Cavalier
- Aix-Marseille Univ, CNRS, EIPL, Marseille, France
- Aix-Marseille Univ, CNRS, LISM, Marseille, France
| | - Stéphane Canaan
- Aix-Marseille Univ, CNRS, EIPL, Marseille, France
- Aix-Marseille Univ, CNRS, LISM, Marseille, France
| | - Agnès P. Girard-Egrot
- Univ. Lyon, Université Lyon 1, CNRS, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, ICBMS—UMR 5246, GEMBAS team, Lyon, France
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4
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Specific interaction to PIP2 increases the kinetic rate of membrane binding of VILIPs, a subfamily of Neuronal Calcium Sensors (NCS) proteins. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2698-707. [DOI: 10.1016/j.bbamem.2014.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 06/25/2014] [Accepted: 06/26/2014] [Indexed: 12/22/2022]
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5
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Rebaud S, Simon A, Wang CK, Mason L, Blum L, Hofmann A, Girard-Egrot A. Comparison of VILIP-1 and VILIP-3 binding to phospholipid monolayers. PLoS One 2014; 9:e93948. [PMID: 24699524 PMCID: PMC3974848 DOI: 10.1371/journal.pone.0093948] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Accepted: 03/11/2014] [Indexed: 01/06/2023] Open
Abstract
The neuronal calcium sensor proteins Visinin-like Proteins 1 (VILIP-1) and 3 (VILIP-3) are effectors of guanylyl cyclase and acetyl choline receptors, and transduce calcium signals in the brain. The “calcium-myristoyl” switch, which involves a post-translationally added myristoyl moiety and calcium binding, is thought to regulate their membrane binding capacity and therefore, play a critical role in their mechanism of action. In the present study, we investigated the effect of membrane composition and solvent conditions on the membrane binding mechanisms of both VILIPs using lipid monolayers at the air/buffer interface. Results based on comparison of the adsorption kinetics of the myristoylated and non-myristoylated proteins confirm the pivotal role of calcium and the exposed myristol moiety for sustaining the membrane-bound state of both VILIPs. However, we also observed binding of both VILIP proteins in the absence of calcium and/or myristoyl conjugation. We propose a two-stage membrane binding mechanism for VILIP-1 and VILIP-3 whereby the proteins are initially attracted to the membrane surface by electrostatic interactions and possibly by specific interactions with highly negatively charged lipids head groups. The extrusion of the conjugated myristoyl group, and the subsequent anchoring in the membrane constitutes the second stage of the binding mechanism, and ensures the sustained membrane-bound form of these proteins.
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Affiliation(s)
- Samuel Rebaud
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Université Lyon 1, University of Lyon, ICBMS, CNRS UMR 5246, Bât. Curien, 43 bd du 11 Nov. 1918, F-69622 Villeurbanne cedex, France
| | - Anne Simon
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Université Lyon 1, University of Lyon, ICBMS, CNRS UMR 5246, Bât. Curien, 43 bd du 11 Nov. 1918, F-69622 Villeurbanne cedex, France
- * E-mail:
| | - Conan K. Wang
- Structural Chemistry Program, Eskitis Institute, Griffith University, Brisbane, Queensland, Australia
| | - Lyndel Mason
- Structural Chemistry Program, Eskitis Institute, Griffith University, Brisbane, Queensland, Australia
| | - Loïc Blum
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Université Lyon 1, University of Lyon, ICBMS, CNRS UMR 5246, Bât. Curien, 43 bd du 11 Nov. 1918, F-69622 Villeurbanne cedex, France
| | - Andreas Hofmann
- Structural Chemistry Program, Eskitis Institute, Griffith University, Brisbane, Queensland, Australia
| | - Agnès Girard-Egrot
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Université Lyon 1, University of Lyon, ICBMS, CNRS UMR 5246, Bât. Curien, 43 bd du 11 Nov. 1918, F-69622 Villeurbanne cedex, France
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6
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Sarkis J, Rocha J, Maniti O, Jouhet J, Vié V, Block MA, Breton C, Maréchal E, Girard‐Egrot A. The influence of lipids on MGD1 membrane binding highlights novel mechanisms for galactolipid biosynthesis regulation in chloroplasts. FASEB J 2014; 28:3114-23. [DOI: 10.1096/fj.14-250415] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Joe Sarkis
- Equipe Génie Enzymatique, Membranes Biomimétiques et Assemblages Supramoléculaires (GEMBAS) TeamInstitut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS)Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 5246University of Lyon 1VilleurbanneFrance
| | - Joana Rocha
- Centre de Recherches sur les Macromolécules Végétales (CERMAV), CNRSUniversity of Grenoble 1GrenobleFrance
| | - Ofelia Maniti
- Equipe Génie Enzymatique, Membranes Biomimétiques et Assemblages Supramoléculaires (GEMBAS) TeamInstitut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS)Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 5246University of Lyon 1VilleurbanneFrance
| | - Juliette Jouhet
- Laboratoire de Physiologie Cellulaire et Végétale, CNRSCommissariat à l'énergie Atomique et aux énergies Alternatives (CEA)Institut National de Recherche Agronomique (INRA)University of Grenoble Alpes, UMR 5168GrenobleFrance
| | - Véronique Vié
- Institut de Physique de Rennes (IPR), UMR CNRS 6251University of Rennes 1Campus BeaulieuRennesFrance
| | - Maryse A. Block
- Laboratoire de Physiologie Cellulaire et Végétale, CNRSCommissariat à l'énergie Atomique et aux énergies Alternatives (CEA)Institut National de Recherche Agronomique (INRA)University of Grenoble Alpes, UMR 5168GrenobleFrance
| | - Christelle Breton
- Centre de Recherches sur les Macromolécules Végétales (CERMAV), CNRSUniversity of Grenoble 1GrenobleFrance
| | - Eric Maréchal
- Laboratoire de Physiologie Cellulaire et Végétale, CNRSCommissariat à l'énergie Atomique et aux énergies Alternatives (CEA)Institut National de Recherche Agronomique (INRA)University of Grenoble Alpes, UMR 5168GrenobleFrance
| | - Agnès Girard‐Egrot
- Equipe Génie Enzymatique, Membranes Biomimétiques et Assemblages Supramoléculaires (GEMBAS) TeamInstitut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS)Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 5246University of Lyon 1VilleurbanneFrance
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7
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Redon S, Massin J, Pouvreau S, De Meulenaere E, Clays K, Queneau Y, Andraud C, Girard-Egrot A, Bretonnière Y, Chambert S. Red Emitting Neutral Fluorescent Glycoconjugates for Membrane Optical Imaging. Bioconjug Chem 2014; 25:773-87. [DOI: 10.1021/bc500047r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sébastien Redon
- Laboratoire
de Chimie Organique et Bioorganique, ICBMS, INSA Lyon, Bât. J. Verne, 20 Avenue A. Einstein, 69621 Villeurbanne Cedex, France
- Institut
de Chimie et de Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246, Université de Lyon, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât.
Curien, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Julien Massin
- Laboratoire
de Chimie de l’ENS de Lyon, Université de Lyon, CNRS UMR 5182, Université Lyon 1, ENS
de Lyon, 46 allée d’Italie, 69364 Lyon Cedex, France
| | - Sandrine Pouvreau
- Physiologie
Intégrative, Cellulaire et Moléculaire, Université Lyon 1, CNRS UMR 5123, 60622, Villeurbanne, France
| | - Evelien De Meulenaere
- Laboratory
for Molecular Electronics and Photonics, KULeuven, Celestijnenlaan
200D box 2425, 3001 Heverlee, Belgium
- Centre
of Microbial and Plant Genetics, KULeuven, G. Geenslaan 1 box 2471, 3001 Heverlee, Belgium
| | - Koen Clays
- Laboratory
for Molecular Electronics and Photonics, KULeuven, Celestijnenlaan
200D box 2425, 3001 Heverlee, Belgium
| | - Yves Queneau
- Laboratoire
de Chimie Organique et Bioorganique, ICBMS, INSA Lyon, Bât. J. Verne, 20 Avenue A. Einstein, 69621 Villeurbanne Cedex, France
- Institut
de Chimie et de Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246, Université de Lyon, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât.
Curien, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Chantal Andraud
- Laboratoire
de Chimie de l’ENS de Lyon, Université de Lyon, CNRS UMR 5182, Université Lyon 1, ENS
de Lyon, 46 allée d’Italie, 69364 Lyon Cedex, France
| | - Agnès Girard-Egrot
- Institut
de Chimie et de Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246, Université de Lyon, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât.
Curien, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
- Laboratoire
de Génie Enzymatique, Membranes Biomimétiques et Assemblages
Supramoléculaires, Institut de Chimie et de Biochimie Moléculaires
et Supramoléculaires, ICBMS, Université Lyon 1, Bât. Curien, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Yann Bretonnière
- Laboratoire
de Chimie de l’ENS de Lyon, Université de Lyon, CNRS UMR 5182, Université Lyon 1, ENS
de Lyon, 46 allée d’Italie, 69364 Lyon Cedex, France
| | - Stéphane Chambert
- Laboratoire
de Chimie Organique et Bioorganique, ICBMS, INSA Lyon, Bât. J. Verne, 20 Avenue A. Einstein, 69621 Villeurbanne Cedex, France
- Institut
de Chimie et de Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246, Université de Lyon, Université Lyon 1, INSA-Lyon, CPE-Lyon, Bât.
Curien, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
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8
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Chaari A, Horchani H, Frikha F, Verger R, Gargouri Y, Ladjimi M. Surface behavior of α-Synuclein and its interaction with phospholipids using the Langmuir monolayer technique: A comparison between monomeric and fibrillar α-Synuclein. Int J Biol Macromol 2013; 58:190-8. [DOI: 10.1016/j.ijbiomac.2013.03.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Revised: 03/12/2013] [Accepted: 03/23/2013] [Indexed: 11/16/2022]
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9
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Characterization of Unique Signature Sequences in the Divergent Maternal Protein Bcl2l10. Mol Biol Evol 2011; 28:3271-83. [DOI: 10.1093/molbev/msr152] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Queneau Y, Dumoulin F, Cheaib R, Chambert S, Andraud C, Bretonnière Y, Blum LJ, Boullanger P, Girard-Egrot A. Two-dimensional supramolecular assemblies involving neoglycoplipids: Self-organization and insertion properties into Langmuir monolayers. Biochimie 2010; 93:101-12. [PMID: 20346388 DOI: 10.1016/j.biochi.2010.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2009] [Accepted: 03/09/2010] [Indexed: 11/28/2022]
Abstract
In nature, interfacial molecular recognition and chirality are of fundamental significance for the construction of biological assemblies. Lipid monolayers at liquid interface can be used as biomimetic models for studying molecular interactions in such assemblies. In this article, we will focus on the use of Langmuir monolayers for studying self-organization and insertion properties of several neoglycolipids. Two types of glycolipids have been considered, one in the context of the analysis of glycoconjugates of biological relevance, and one dealing with the ability of some glycoprobes to insert into a monolayer in relation with their efficiency for serving as membrane imaging systems.
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Affiliation(s)
- Yves Queneau
- Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires, UMR 5246, CNRS, université de Lyon, université Lyon 1, INSA-Lyon, CPE-Lyon, Bât. Curien, 43 Bd du 11 Novembre 1918, F 69622 Villeurbanne, France.
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11
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Ji SR, Ma L, Bai CJ, Shi JM, Li HY, Potempa LA, Filep JG, Zhao J, Wu Y. Monomeric C‐reactive protein activates endothelial cells
via
interaction with lipid raft microdomains. FASEB J 2009; 23:1806-16. [DOI: 10.1096/fj.08-116962] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shang-Rong Ji
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
| | - Le Ma
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
| | - Cai-Juan Bai
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
| | - Jing-Ming Shi
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
| | - Hai-Yun Li
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
| | | | - János G. Filep
- Research CenterMaisonneuve‐Rosemont HospitalUniversity of MontréalMontréalQuébecCanada
| | - Jing Zhao
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
| | - Yi Wu
- MOE Key Laboratory of Arid and Grassland EcologyInstitute of BiophysicsLanzhou UniversityLanzhouChina
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12
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Zhang YJ, Dai Q, Wu SM, Zhu HY, Shen GF, Li EL, Xiao SD. Susceptibility for NSAIDs-induced apoptosis correlates to p53 gene status in gastric cancer cells. Cancer Invest 2008; 26:868-77. [PMID: 18798056 DOI: 10.1080/07357900801944872] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The anti-tumor effect of non-steroidal anti-inflammatory drugs (NSAIDs) remains unclear. Here, we found that the susceptibility for NSAIDs-induced apoptosis might correlate with the status of the p53 gene in gastric cancer cells. Apoptosis in gastric cancer cells expressing wild-type p53 is induced through up-regulation of bax and down-regulation of bcl-2 and that regulation of the bax-bcl-2 heterodimer may be a major target of NSAIDs. As to gastric cancer cells expressing mutant-type p53, other key factors may exist in the NSAIDs' growth inhibition action.
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Affiliation(s)
- Yan-Jie Zhang
- Digestive Department of the No. 3 People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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13
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Study of the interaction of β-cyclodextrin with phospholipid monolayers by surface pressure measurements and fluorescence microscopy. J Colloid Interface Sci 2008; 322:73-8. [DOI: 10.1016/j.jcis.2008.03.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Revised: 03/03/2008] [Accepted: 03/15/2008] [Indexed: 11/22/2022]
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14
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Nouvion AL, Thibaut J, Lohez OD, Venet S, Colas P, Gillet G, Lalle P. Modulation of Nr-13 antideath activity by peptide aptamers. Oncogene 2006; 26:701-10. [PMID: 16909120 DOI: 10.1038/sj.onc.1209832] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tumor cells are characterized by deregulated proliferation and resistance to proapoptotic stimuli. The Bcl-2 family of antiapoptotic proteins is overexpressed in a large number of chemoresistant tumors. Downregulation or inhibition of antiapoptotic proteins might result in the sensitization of cancer cells to chemotherapeutic agents. In the present study, we took advantage of the peptide aptamer strategy to target Nr-13, a Bcl-2 antiapoptotic protein involved in neoplastic transformation by the Rous sarcoma virus. We isolated peptide aptamers that behave as Nr-13 regulators, in vitro and in mammalian cells in culture. Some of these aptamers have potential proapoptotic activities. These data suggest that peptide aptamers targeting the Bcl-2 family of apoptosis inhibitors may be useful for the development of anticancer molecules.
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Affiliation(s)
- A-L Nouvion
- Equipe Apoptose et Oncogenèse, Institut de Biologie et Chimie des Protéines (IBCP UMR 5086 CNRS/Université claude Bernard Lyon 1), IFR128 BioSciences Lyon-Gerland, Lyon, France
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15
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Girard-Egrot AP, Godoy S, Blum LJ. Enzyme association with lipidic Langmuir-Blodgett films: interests and applications in nanobioscience. Adv Colloid Interface Sci 2005; 116:205-25. [PMID: 16181605 DOI: 10.1016/j.cis.2005.04.006] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2005] [Accepted: 04/07/2005] [Indexed: 11/22/2022]
Abstract
This review presents the recent advances in the achievement of organized proteo-lipidic nanostructures based on Langmuir-Blodgett technology and their potential applications in the nanobioscience area. By using the self-assembled properties of amphiphilic biomolecules at the air-water interface, the Langmuir-Blodgett (LB) technique offers the possibility to prepare ultrathin layers suitable for biomolecule immobilization at the molecular level. This review will provide a general overview of the enzyme association with preformed Langmuir-Blodgett films in connection with their potential applications in biosensing device developments, and then introduce the design of a new functionalised biomimetic nanostructure with oriented recognition site. The potential applications of such an organized proteo-lipidic nanostructure for biocatalysis investigations of an immobilised enzyme in a biomimetic situation and for the development of bioelectronic devices are finally discussed.
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Affiliation(s)
- Agnès P Girard-Egrot
- Laboratoire de Génie Enzymatique et Biomoléculaire, EMB2/UMR 5013, CNRS/UCBL, Université Claude Bernard Lyon 1, 43 Bd du 11 novembre 1918, F-69622 Villeurbanne Cedex, France.
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Lahdo R, de LA FOURNIèRE-BESSUEILLE L. Insertion of the amyloid precursor protein into lipid monolayers: effects of cholesterol and apolipoprotein E. Biochem J 2005; 382:987-94. [PMID: 15202933 PMCID: PMC1133975 DOI: 10.1042/bj20040777] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2004] [Accepted: 06/15/2004] [Indexed: 11/17/2022]
Abstract
APP (amyloid precursor protein), together with Chol (cholesterol) and ApoE (apolipoprotein E), has been linked to Alzheimer's disease. We have examined the hypothesis that interaction of APP with the lipid membranes is modulated by Chol and ApoE. Insertion of APP into lipid monolayers was first evidenced as an increase in the surface pressure. APP injected into a subphase induced a substantial increase in the surface pressure of monolayers prepared from PC (L-alpha-phosphatidylcholine), Chol, SPM (sphingomyelin) and PS (L-alpha-phosphatidylserine), the major lipids present in the plasma membranes of brain cells. At a given initial pressure, the insertion of APP into expanded monolayers is higher than that in condensed monolayers, in the order Chol>PC>SPM>PS. The membrane insertion capacity of APP was also measured from surface pressure versus area (pi-A) isotherms of APP-lipid monolayers. The increase in the mean area per molecule in protein-lipid monolayers, in the order PC>Chol>PS>SPM, provides further evidence for protein-lipid interactions. These interactions occurred at optimum salt levels and optimum pH values close to physiological conditions (150 mM NaCl and pH 7.4). In addition, ApoE4 affected the insertion of APP into lipid films. APP-ApoE complexes showed a decreased ability to penetrate lipid monolayers at a constant area. APP-ApoE complexes expanded the pi-A isotherm of a Chol monolayer to a lesser extent than APP alone. These experiments demonstrate the roles of Chol and ApoE in the modulation of membrane insertion of APP.
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Affiliation(s)
- Raghda Lahdo
- Laboratoire ‘Organisation et Dynamique des Membranes Biologiques’, UMR CNRS 5013, Université Claude Bernard – Lyon I, 43 Boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France
| | - Laurence de LA FOURNIèRE-BESSUEILLE
- Laboratoire ‘Organisation et Dynamique des Membranes Biologiques’, UMR CNRS 5013, Université Claude Bernard – Lyon I, 43 Boulevard du 11 novembre 1918, 69622 Villeurbanne cedex, France
- To whom correspondence should be addressed (email )
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