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Kergomard J, Carrière F, Paboeuf G, Chonchon L, Barouh N, Vié V, Bourlieu C. Interfacial adsorption and activity of pancreatic lipase-related protein 2 onto heterogeneous plant lipid model membranes. Biochimie 2023; 215:12-23. [PMID: 37062468 DOI: 10.1016/j.biochi.2023.04.001] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/24/2023] [Accepted: 04/04/2023] [Indexed: 04/18/2023]
Abstract
Pancreatic lipase related-protein 2 (PLRP2) exhibits remarkable galactolipase and phospholipase A1 activities, which depend greatly on the supramolecular organization of the substrates and the presence of surfactant molecules such as bile salts. The objective of the study was to understand the modulation of the adsorption mechanisms and enzymatic activity of Guinea pig PLRP2 (gPLRP2), by the physical environment of the enzyme and the physical state of its substrate. Langmuir monolayers were used to reproduce homogeneous and heterogeneous photosynthetic model membranes containing galactolipids (GL), and/or phospholipids (PL), and/or phytosterols (pS), presenting uncharged or charged interfaces. The same lipid mixtures were also used to form micrometric liposomes, and their gPLRP2 catalyzed digestion kinetics were investigated in presence or in absence of bile salts (NaTDC) during static in vitro, so called "bulk", digestion. The enzymatic activity of gPLRP2 onto the galactolipid-based monolayers was characterized with an optimum activity at 15 mN/m, in the absence of bile salts. gPLRP2 showed enhanced adsorption onto biomimetic model monolayer containing negatively charged lipids. However, the compositional complexity in the heterogeneous uncharged model systems induced a lag phase before the initiation of lipolysis. In bulk, no enzymatic activity could be demonstrated on GL-based liposomes in the absence of bile salts, probably due to the high lateral pressure of the lipid bilayers. In the presence of NaTDC (4 mM), however, gPLRP2 showed both high galactolipase and moderate phospholipase A1 activities on liposomes, probably due to a decrease in packing and lateral pressure upon NaTDC adsorption, and subsequent disruption of liposomes.
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Affiliation(s)
- Jeanne Kergomard
- IPR Institute of Physics, Université de Rennes, France; INRAE/UM/Institut Agro Montpellier UMR 1208 IATE, France
| | - Frédéric Carrière
- Aix-Marseille Université, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, Marseille, France
| | - Gilles Paboeuf
- IPR Institute of Physics, Université de Rennes, France; Univ Rennes, CNRS, ScanMAT - UMS 2001, F-35042, Rennes, France
| | | | - Nathalie Barouh
- CIRAD, UMR QUALISUD, F34398, Montpellier, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, Université de La Réunion, Montpellier, France
| | - Véronique Vié
- IPR Institute of Physics, Université de Rennes, France; Univ Rennes, CNRS, ScanMAT - UMS 2001, F-35042, Rennes, France.
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Kergomard J, Carrière F, Paboeuf G, Artzner F, Barouh N, Bourlieu C, Vié V. Interfacial organization and phase behavior of mixed galactolipid-DPPC-phytosterol assemblies at the air-water interface and in hydrated mesophases. Colloids Surf B Biointerfaces 2022; 217:112646. [PMID: 35763897 DOI: 10.1016/j.colsurfb.2022.112646] [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: 04/12/2022] [Revised: 05/19/2022] [Accepted: 06/14/2022] [Indexed: 11/26/2022]
Abstract
The structural behavior of model assemblies composed of monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG), the two main galactolipids found in plants, was investigated at the air/water interface and in aqueous dispersion. To approach the composition of the natural photosynthetic membranes, tunable Langmuir model membrane of galactolipids (GL) were used, and were complexified to form either heterogenous binary or ternary assemblies of GL, phospholipids (PL), and phytosterols (pS). The impact of pS, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) or both on the structural properties of GL membrane was studied. The nature of the interactions between the different molecules was investigated using biophysical characterizations (ellipsometry, tensiometry, atomic force microscopy). In addition, the phase behavior was determined by SAXS analysis on the model assemblies in aqueous dispersions. Results revealed the good interfacial stability of these specific plant membrane lipids. The morphology of the GL film was characteristic of a fluid phase, with an interfacial roughness induced by the intercalation of monogalactosyl and digalactosyl polar heads of MGDG and DGDG, respectively. A phase heterogeneity in the monolayer was induced by the addition of DPPC and/or pS, which resulted in the modification of galactolipid organization and headgroup interactions. These structural changes were confirmed by SAXS analysis, showing more favorable interactions between MGDG and DPPC than between DGDG and DPPC in aqueous dispersion. This phenomenon was exacerbated in the presence of pS.
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Affiliation(s)
- Jeanne Kergomard
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France; INRAE/CIRAD/UM/Institut Agro Montpellier UMR 1208 IATE, France
| | - Frédéric Carrière
- Aix-Marseille Université, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, Marseille, France
| | - Gilles Paboeuf
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France
| | - Franck Artzner
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France
| | - Nathalie Barouh
- CIRAD, UMR QUALISUD, F34398 Montpellier, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, Université de La Réunion, Montpellier, France
| | - Claire Bourlieu
- INRAE/CIRAD/UM/Institut Agro Montpellier UMR 1208 IATE, France
| | - Véronique Vié
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France; Univ Rennes 1, CNRS, ScanMAT - UMS 2001, F-35042 Renne, France.
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Santonastaso A, Boria A, Paboeuf G, Beaufils S, Bolanos-Garcia VM, Vié V, Scotti C. Interfacial Activity of Lipoprotein (a) Isoforms with a Variable Number of Kringle IV Type 2 Repeats: A New Indicator of Cardiovascular Risk? Ann Clin Lab Sci 2021; 51:795-804. [PMID: 34921033] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE Lipoprotein (a) [Lp(a)] is an LDL-like particle constituted by lipids, apolipoprotein B100 and apolipoprotein (a) [apo(a)], a multidomain glycoprotein whose molecular mass is dependent on the genetically encoded number of Kringle IV type 2 (KIV-2) repeats. Because Lp(a) isoforms have been associated with cardiovascular risk (CVR), we have investigated if their interfacial properties can contribute to distinguish between low and high-risk groups and thus be used as a new CVR indicator. METHODS Four Lp(a) variants, each carrying a different apo(a) isoform (K20, K24, K25, and K29), were purified from plasma of homozygous donors and their interfacial properties characterized using ellipsometry and surface pressure techniques. RESULTS Ellipsometry measurements revealed that these isoforms had a similar propensity to form adsorbed layers at hydrophobic-hydrophilic interfaces, but surface pressure enabled to clearly separate them into two groups: K20 and K24 on one side, and K25 and K29 on the other side. CONCLUSION Though K24 and K25 differ only by a single KIV-2 domain, their sharp difference in surface pressure suggests a critical threshold between the two Lp(a) forms, providing insights into the use of condensed matter approaches to monitor CVR. Our findings may represent a new laboratory window to assist medical decisions and to develop precision medicine treatments, practices, and products for CVR, which can be extended to other cardiovascular disease conditions.
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Affiliation(s)
- Alice Santonastaso
- Department of Molecular Medicine, Unit of Immunology and General Pathology, University of Pavia, Pavia, Italy
| | | | - Gilles Paboeuf
- IPR Institute of Physics, UMR UR1 CNRS; Université Rennes 1, CNRS, ScanMAT - UMS 2001, Rennes, France
| | - Sylvie Beaufils
- IPR Institute of Physics, UMR UR1 CNRS; Université Rennes 1, CNRS, ScanMAT - UMS 2001, Rennes, France
| | - Victor M Bolanos-Garcia
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, United Kindom
| | - Véronique Vié
- IPR Institute of Physics, UMR UR1 CNRS; Université Rennes 1, CNRS, ScanMAT - UMS 2001, Rennes, France
| | - Claudia Scotti
- Department of Molecular Medicine, Unit of Immunology and General Pathology, University of Pavia, Pavia, Italy
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Pasquier C, Pezennec S, Bouchoux A, Cabane B, Lechevalier V, Le Floch-Fouéré C, Paboeuf G, Pasco M, Dollet B, Lee LT, Beaufils S. Protein Transport upon Advection at the Air/Water Interface: When Charge Matters. Langmuir 2021; 37:12278-12289. [PMID: 34636247 DOI: 10.1021/acs.langmuir.1c01591] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The formation of dense protein interfacial layers at a free air-water interface is known to result from both diffusion and advection. Furthermore, protein interactions in concentrated phases are strongly dependent on their overall positive or negative net charge, which is controlled by the solution pH. As a consequence, an interesting question is whether the presence of an advection flow of water toward the interface during protein adsorption produces different kinetics and interfacial structure of the adsorbed layer, depending on the net charge of the involved proteins and, possibly, on the sign of this charge. Here we test a combination of the following parameters using ovalbumin and lysozyme as model proteins: positive or negative net charge and the presence or absence of advection flow. The formation and the organization of the interfacial layers are studied by neutron reflectivity and null-ellipsometry measurements. We show that the combined effect of a positive charge of lysozyme and ovalbumin and the presence of advection flow does induce the formation of interfacial multilayers. Conversely, negatively charged ovalbumin forms monolayers, whether advection flow is present or not. We show that an advection/diffusion model cannot correctly describe the adsorption kinetics of multilayers, even in the hypothesis of a concentration-dependent diffusion coefficient as in colloidal filtration, for instance. Still, it is clear that advection is a necessary condition for making multilayers through a mechanism that remains to be determined, which paves the way for future research.
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Affiliation(s)
- Coralie Pasquier
- INRAE, Institut Agro, STLO, F-35042 Rennes, France
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes, 1 University, France
| | | | - Antoine Bouchoux
- TBI, Université de Toulouse, CNRS, INRAE, INSA, 31077 Toulouse, France
| | | | | | | | - Gilles Paboeuf
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes, 1 University, France
- Université Rennes 1, CNRS, ScanMAT - UMS 2001, F-35042 Rennes, France
| | | | - Benjamin Dollet
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - Lay-Theng Lee
- Laboratoire Léon Brillouin CEA - Saclay, Université Paris-Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Sylvie Beaufils
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes, 1 University, France
- Université Rennes 1, CNRS, ScanMAT - UMS 2001, F-35042 Rennes, France
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5
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Kergomard J, Paboeuf G, Barouh N, Villeneuve P, Schafer O, Wooster TJ, Bourlieu C, Vié V. Stability to oxidation and interfacial behavior at the air/water interface of minimally-processed versus processed walnut oil-bodies. Food Chem 2021; 360:129880. [PMID: 33989883 DOI: 10.1016/j.foodchem.2021.129880] [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] [Received: 11/20/2020] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 01/12/2023]
Abstract
Oil bodies (OB), the form of triacylglycerol storage in seeds, are interesting natural assemblies for nutritional applications. In walnuts, OB contain an important amount of polyunsaturated fatty acids that could be interesting food ingredients but may be prone to oxidation. The oxidative and interfacial behavior of walnut OB, either minimally-processed or after processing, were compared with processed complex walnut juice. The good oxidative stability of minimally-processed OB over 10 days (PV ≤ 8.4 meq O2/kg, TBARS = 1.4 mmol eq MDA/kg) and of processed walnut complex matrixes over 20 days (PV ≤ 4.8 meq O2/kg, TBARS = 1.4 mmol eq MDA/kg) was evidenced. In comparison, processing of OB promoted their oxidation. The interfacial studies led to the proposition of a new model of adsorption for minimally-processed OB that will be useful to design functional emulsion or foam in which OB act as emulsifiers.
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Affiliation(s)
- Jeanne Kergomard
- IPR Institute of Physics, UMR UR1 CNRS 5261, Rennes 1 University, France; IATE, Univ Montpellier, INRAE, Institut Agro, Montpellier, France; QUALISUD, Univ Montpellier, CIRAD, Institut Agro, IRD, Univ Réunion, Montpellier, France
| | - Gilles Paboeuf
- IPR Institute of Physics, UMR UR1 CNRS 5261, Rennes 1 University, France; Univ Rennes 1, CNRS, ScanMAT - UMS 2001 F-35042 Rennes, France
| | - Nathalie Barouh
- QUALISUD, Univ Montpellier, CIRAD, Institut Agro, IRD, Univ Réunion, Montpellier, France
| | - Pierre Villeneuve
- QUALISUD, Univ Montpellier, CIRAD, Institut Agro, IRD, Univ Réunion, Montpellier, France
| | - Olivier Schafer
- Institute of Materials Science, Nestlé Research, Lausanne, Switzerland
| | - Tim J Wooster
- Institute of Materials Science, Nestlé Research, Lausanne, Switzerland
| | - Claire Bourlieu
- IATE, Univ Montpellier, INRAE, Institut Agro, Montpellier, France
| | - Véronique Vié
- IPR Institute of Physics, UMR UR1 CNRS 5261, Rennes 1 University, France; Univ Rennes 1, CNRS, ScanMAT - UMS 2001 F-35042 Rennes, France.
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6
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Bourlieu C, Mahdoueni W, Paboeuf G, Gicquel E, Ménard O, Pezennec S, Bouhallab S, Deglaire A, Dupont D, Carrière F, Vié V. Physico-chemical behaviors of human and bovine milk membrane extracts and their influence on gastric lipase adsorption. Biochimie 2020; 169:95-105. [DOI: 10.1016/j.biochi.2019.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 12/07/2019] [Indexed: 12/11/2022]
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7
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De Pascale M, Iacopetta D, Since M, Corvaisier S, Vie V, Paboeuf G, Hennequin D, Perato S, De Giorgi M, Sinicropi MS, Sopkova-De Oliveira Santos J, Voisin-Chiret AS, Malzert-Freon A. Synthesis of Pyridoclax Analogues: Insight into Their Druggability by Investigating Their Physicochemical Properties and Interactions with Membranes. ChemMedChem 2020; 15:136-154. [PMID: 31743599 DOI: 10.1002/cmdc.201900542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 09/23/2019] [Revised: 10/30/2019] [Indexed: 12/20/2022]
Abstract
Pyridoclax is considered a promising anticancer drug, acting as a protein-protein interaction disruptor, with potential applications in the treatment of ovarian, lung, and mesothelioma cancers. Eighteen sensibly selected structural analogues of Pyridoclax were synthesized, and their physicochemical properties were systematically assessed and analyzed. Moreover, considering that drug-membrane interactions play an essential role in understanding the mode of action of a given drug and its eventual toxic effects, membrane models were used to investigate such interactions in bulk (liposomes) and at the air-water interface. The measured experimental data on all original oligopyridines allowed the assessment of relative differences in terms of physicochemical properties, which could be determinant for their druggability, and hence for drug development.
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Affiliation(s)
| | - Domenico Iacopetta
- Department of Pharmacy Health and Nutritional Sciences, University of Calabria, 87036, Arcavacata di Rende, Italy
| | - Marc Since
- Normandie Univ, UniCaen, CERMN, 14000, Caen, France
| | | | - Véronique Vie
- Département Matière Molle BioMolécules aux Interfaces Fluides IPR, UR1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Gilles Paboeuf
- Département Matière Molle BioMolécules aux Interfaces Fluides IPR, UR1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | | | - Serge Perato
- Normandie Univ, UniCaen, CERMN, 14000, Caen, France
| | | | - Maria Stefania Sinicropi
- Department of Pharmacy Health and Nutritional Sciences, University of Calabria, 87036, Arcavacata di Rende, Italy
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Bouraoui A, Berchel M, Ghanem R, Vié V, Paboeuf G, Deschamps L, Lozach O, Le Gall T, Montier T, Jaffrès PA. Substitution of unsaturated lipid chains by thioether-containing lipid chains in cationic amphiphiles: physicochemical consequences and application for gene delivery. Org Biomol Chem 2020; 17:3609-3616. [PMID: 30912791 DOI: 10.1039/c9ob00473d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The hydrophobic moiety of cationic amphiphiles plays an important role in the transfection process because its structure has an impact on both the type of the supramolecular assembly and the dynamic properties of these assemblies. The latter have to exhibit a compromise between stability and instability to efficiently compact then deliver DNA into target cells. In the present work, we report the synthesis of new cationic amphiphiles featuring a thioether function at different positions of two 18-atom length lipid chains and we study their physicochemical properties (anisotropy of fluorescence and compression isotherms) with analogues possessing either oleyl (C18:1) or stearyl (C18:0) chains. We show that the fluidity of cationic lipids featuring a thioether function located close to the middle of each lipid chain is intermediate between that of oleyl- and stearyl-containing analogues. These properties are also supported by the compression isotherm assays. When used as carriers to deliver a plasmid DNA, thioether-containing cationic amphiphiles demonstrate a good ability to transfect human-derived cell lines, with those incorporating such a moiety in the middle of the chain being the most efficient. This work supports the use of a thioether function as a possible alternative to unsaturation in aliphatic lipid chains of cationic amphiphiles to modulate physicochemical behaviours and in turn biological activities such as gene delivery ability.
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Affiliation(s)
- Amal Bouraoui
- CEMCA UMR CNRS 6521, Université de Brest, IBSAM, 6 Avenue Victor Le Gorgeu, F-29238 Brest, France.
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9
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Bouraoui A, Ghanem R, Berchel M, Deschamps L, Vié V, Paboeuf G, Le Gall T, Montier T, Jaffrès PA. Branched lipid chains to prepare cationic amphiphiles producing hexagonal aggregates: supramolecular behavior and application to gene delivery. Org Biomol Chem 2020; 18:337-345. [DOI: 10.1039/c9ob02381j] [Citation(s) in RCA: 5] [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: 01/19/2023]
Abstract
Cationic amphiphiles featuring ramified lipid chains self-organized in water as inverted hexagonal aggregates. They demonstrated high gene delivery efficiencies.
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Affiliation(s)
| | - Rosy Ghanem
- Univ Brest
- INSERM
- groupe “Transfert de gènes et thérapie génique”
- UMR 1078
- CHRU de Brest
| | | | | | | | | | - Tony Le Gall
- Univ Brest
- INSERM
- groupe “Transfert de gènes et thérapie génique”
- UMR 1078
- CHRU de Brest
| | - Tristan Montier
- Univ Brest
- INSERM
- groupe “Transfert de gènes et thérapie génique”
- UMR 1078
- CHRU de Brest
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10
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Bouraoui A, Ghanem R, Berchel M, Vié V, Le Guen Y, Paboeuf G, Deschamps L, Le Gall T, Montier T, Jaffrès PA. Bis-Thioether-Containing Lipid Chains in Cationic Amphiphiles: Physicochemical Properties and Applications in Gene Delivery. Chemphyschem 2019; 20:2187-2194. [PMID: 31393059 DOI: 10.1002/cphc.201900626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 06/25/2019] [Revised: 07/18/2019] [Indexed: 11/08/2022]
Abstract
Cationic amphiphiles featuring two thioether functions in each lipid chain of bicatenar cationic amphiphiles are reported here for the first time. The physicochemical properties and transfection abilities of these new amphiphiles were compared with those of already reported analogues featuring either (i) saturated, (ii) unsaturated or (iii) mono-thioether containing lipid chains. The homogeneity of the series of new compounds allowed to clearly underscore the effect of bis-thioether containing lipid chains. This study shows that besides previous strategies based on unsaturation or ramification, the incorporation of two thioether functions per lipid chain constitutes an original complementary alternative to tune the supramolecular properties of amphiphilic compounds. The potential of this strategy was evaluated in the context of gene delivery and report that two cationic amphiphiles (i. e. 4 a and 4 b) can be proposed as new efficient transfection reagents.
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Affiliation(s)
- Amal Bouraoui
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
| | - Rosy Ghanem
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Mathieu Berchel
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
| | - Véronique Vié
- Univ Rennes, CNRS, IPR - UMR 6251, ScanMAT - UMS 2001, F-35000, Rennes, France
| | - Yann Le Guen
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Gilles Paboeuf
- Univ Rennes, CNRS, IPR - UMR 6251, ScanMAT - UMS 2001, F-35000, Rennes, France
| | - Laure Deschamps
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
| | - Tony Le Gall
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Tristan Montier
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Paul-Alain Jaffrès
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
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Derde M, Vié V, Walrant A, Sagan S, Lechevalier V, Guérin-Dubiard C, Pezennec S, Cochet MF, Paboeuf G, Pasco M, Baron F, Gautier M, Jan S, Nau F. Antimicrobial activity of lysozyme isoforms: Key molecular features. Biopolymers 2017; 107. [DOI: 10.1002/bip.23040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 07/13/2017] [Accepted: 07/17/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Melanie Derde
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Véronique Vié
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS; Rennes F-35 France
| | - Astrid Walrant
- Sorbonne Universités, UPMC Université Paris 06, PSL Research University, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM); Paris F-75 France
| | - Sandrine Sagan
- Sorbonne Universités, UPMC Université Paris 06, PSL Research University, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM); Paris F-75 France
| | | | | | | | | | - Gilles Paboeuf
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS; Rennes F-35 France
| | | | - Florence Baron
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Michel Gautier
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Sophie Jan
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Françoise Nau
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
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12
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Ameziane-Le Hir S, Paboeuf G, Tascon C, Hubert JF, Le Rumeur E, Vié V, Raguénès-Nicol C. Dystrophin Hot-Spot Mutants Leading to Becker Muscular Dystrophy Insert More Deeply into Membrane Models than the Native Protein. Biochemistry 2016; 55:4018-26. [PMID: 27367833 DOI: 10.1021/acs.biochem.6b00290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Dystrophin (DYS) is a membrane skeleton protein whose mutations lead to lethal Duchenne muscular dystrophy or to the milder Becker muscular dystrophy (BMD). One third of BMD "in-frame" exon deletions are located in the region that codes for spectrin-like repeats R16 to R21. We focused on four prevalent mutated proteins deleted in this area (called RΔ45-47, RΔ45-48, RΔ45-49, and RΔ45-51 according to the deleted exon numbers), analyzing protein/membrane interactions. Two of the mutants, RΔ45-48 and RΔ45-51, led to mild pathologies and displayed a similar triple coiled-coil structure as the full-length DYS R16-21, whereas the two others, RΔ45-47 and RΔ45-49, induced more severe pathologies and showed "fractional" structures unrelated to the normal one. To explore lipid packing, small unilamellar liposomes (SUVs) and planar monolayers were used at various initial surface pressures. The dissociation constants determined by microscale thermophoresis (MST) were much higher for the full-length DYS R161-21 than for the mutants; thus the wild type protein has weaker SUV binding. Comparing surface pressures after protein adsorption and analysis of atomic force microscopy images of mixed protein/lipid monolayers revealed that the mutants insert more into the lipid monolayer than the wild type does. In fact, in both models every deletion mutant showed more interactions with membranes than the full-length protein did. This means that mutations in the R16-21 part of dystrophin disturb the protein's molecular behavior as it relates to membranes, regardless of whether the accompanying pathology is mild or severe.
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Affiliation(s)
- Sarah Ameziane-Le Hir
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6251, Institut de Physique de Rennes, 35042 Rennes, France.,UMR CNRS 6290, Équipe SIM, 35043 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6251, Institut de Physique de Rennes, 35042 Rennes, France
| | - Christophe Tascon
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6290, Équipe SIM, 35043 Rennes, France
| | - Jean-François Hubert
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6290, Équipe SIM, 35043 Rennes, France
| | - Elisabeth Le Rumeur
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6290, Équipe SIM, 35043 Rennes, France
| | - Véronique Vié
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6251, Institut de Physique de Rennes, 35042 Rennes, France
| | - Céline Raguénès-Nicol
- Université de Rennes 1 , 35042 Rennes, France.,UMR CNRS 6290, Équipe SIM, 35043 Rennes, France
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Bourlieu C, Paboeuf G, Chever S, Pezennec S, Cavalier JF, Guyomarc’h F, Deglaire A, Bouhallab S, Dupont D, Carrière F, Vié V. Adsorption of gastric lipase onto multicomponent model lipid monolayers with phase separation. Colloids Surf B Biointerfaces 2016; 143:97-106. [DOI: 10.1016/j.colsurfb.2016.03.032] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 03/07/2016] [Accepted: 03/10/2016] [Indexed: 01/17/2023]
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Murthy AVR, Guyomarc'h F, Paboeuf G, Vié V, Lopez C. Cholesterol strongly affects the organization of lipid monolayers studied as models of the milk fat globule membrane: Condensing effect and change in the lipid domain morphology. Biochimica et Biophysica Acta (BBA) - Biomembranes 2015; 1848:2308-16. [DOI: 10.1016/j.bbamem.2015.06.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 06/05/2015] [Accepted: 06/13/2015] [Indexed: 11/25/2022]
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Derde M, Nau F, Guérin-Dubiard C, Lechevalier V, Paboeuf G, Jan S, Baron F, Gautier M, Vié V. Native and dry-heated lysozyme interactions with membrane lipid monolayers: Lipid packing modifications of a phospholipid mixture, model of the Escherichia coli cytoplasmic membrane. Biochim Biophys Acta 2015; 1848:1065-73. [PMID: 25615689 DOI: 10.1016/j.bbamem.2015.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/05/2015] [Accepted: 01/11/2015] [Indexed: 11/17/2022]
Abstract
Antimicrobial resistance is currently an important public health issue. The need for innovative antimicrobials is therefore growing. The ideal antimicrobial compound should limit antimicrobial resistance. Antimicrobial peptides or proteins such as hen egg white lysozyme are promising molecules that act on bacterial membranes. Hen egg white lysozyme has recently been identified as active on Gram-negative bacteria due to disruption of the outer and cytoplasmic membrane integrity. Furthermore, dry-heating (7 days and 80 °C) improves the membrane activity of lysozyme, resulting in higher antimicrobial activity. These in vivo findings suggest interactions between lysozyme and membrane lipids. This is consistent with the findings of several other authors who have shown lysozyme interaction with bacterial phospholipids such as phosphatidylglycerol and cardiolipin. However, until now, the interaction between lysozyme and bacterial cytoplasmic phospholipids has been in need of clarification. This study proposes the use of monolayer models with a realistic bacterial phospholipid composition in physiological conditions. The lysozyme/phospholipid interactions have been studied by surface pressure measurements, ellipsometry and atomic force microscopy. Native lysozyme has proved able to absorb and insert into a bacterial phospholipid monolayer, resulting in lipid packing reorganization, which in turn has lead to lateral cohesion modifications between phospholipids. Dry-heating of lysozyme has increased insertion capacity and ability to induce lipid packing modifications. These in vitro findings are then consistent with the increased membrane disruption potential of dry heated lysozyme in vivo compared to native lysozyme. Moreover, an eggPC monolayer study suggested that lysozyme/phospholipid interactions are specific to bacterial cytoplasmic membranes.
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Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France.
| | - Françoise Nau
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Valérie Lechevalier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| | - Sophie Jan
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Florence Baron
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Michel Gautier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Véronique Vié
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
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Derde M, Nau F, Lechevalier V, Guérin-Dubiard C, Paboeuf G, Jan S, Baron F, Gautier M, Vié V. Native lysozyme and dry-heated lysozyme interactions with membrane lipid monolayers: lateral reorganization of LPS monolayer, model of the Escherichia coli outer membrane. Biochim Biophys Acta 2014; 1848:174-83. [PMID: 25450345 DOI: 10.1016/j.bbamem.2014.10.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/26/2014] [Accepted: 10/20/2014] [Indexed: 01/24/2023]
Abstract
Lysozyme is mainly described active against Gram-positive bacteria, but is also efficient against some Gram-negative species. Especially, it was recently demonstrated that lysozyme disrupts Escherichia coli membranes. Moreover, dry-heating changes the physicochemical properties of the protein and increases the membrane activity of lysozyme. In order to elucidate the mode of insertion of lysozyme into the bacterial membrane, the interaction between lysozyme and a LPS monolayer mimicking the E. coli outer membrane has been investigated by tensiometry, ellipsometry, Brewster angle microscopy and atomic force microscopy. It was thus established that lysozyme has a high affinity for the LPS monolayer, and is able to insert into the latter as long as polysaccharide moieties are present, causing reorganization of the LPS monolayer. Dry-heating increases the lysozyme affinity for the LPS monolayer and its insertion capacity; the resulting reorganization of the LPS monolayer is different and more drastic than with the native protein.
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Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France.
| | - Françoise Nau
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Valérie Lechevalier
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| | - Sophie Jan
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Florence Baron
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Michel Gautier
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Véronique Vié
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France.
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Gupta D, Beaufils S, Vie V, Paboeuf G, Broadhurst B, Schweisguth F, L. Blundell T, M. Bolanos-Garcia V. Crystal structure, biochemical and biophysical characterisation of NHR1 domain of E3 Ubiquitin ligase neutralized. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/aer.2013.13007] [Citation(s) in RCA: 3] [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: 11/20/2022]
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Gabillard JC, Sabin N, Paboeuf G. In vitro characterization of proliferation and differentiation of trout satellite cells. Cell Tissue Res 2010; 342:471-7. [PMID: 21086139 DOI: 10.1007/s00441-010-1071-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Accepted: 10/05/2010] [Indexed: 11/27/2022]
Abstract
Fish satellite cells have been extracted from various species, but the myogenic characteristics of these cells in culture remain largely unknown. We show here that 60%-70% of the adherent cells are myogenic based on their immunoreactivity for the myogenic regulatory factor MyoD. In DMEM containing 10% fetal calf serum (FCS), trout myoblasts display rapid expression of myogenin (18% of myogenin-positive cells at day 2) combined with rapid fusion into myotubes (50% of myogenin-positive nuclei and 30% nuclei in myosin heavy chain [MyHC]-positive cells at day 7). These kinetics of differentiation are reminiscent of the behavior of fetal myoblasts in mammals. However, not all the myogenic cells differentiate; this subpopulation of cells might correspond to the previously named "reserve" cells. More than 90% of the BrdU-positive cells are also positive for MyoD, indicating that myogenic cells proliferate in vitro. By contrast, less than 1% of myogenin-positive cells are positive for BrdU suggesting that myogenin expression occurs only in post-mitotic cells. In order to maximize either the proliferation or the differentiation of cells, we have defined new culture conditions based on the use of a proliferation medium (F10+10%FCS) and a differentiation medium (DMEM+2%FCS). Three days after switching the medium, the differentiation index (% MyHC-positive nuclei) is 40-fold higher than that in proliferation medium, whereas the proliferation index (% BrdU-positive nuclei) is three-fold lower. Stimulation of cell proliferation by insulin-like growth factor 1 (IGF1), IGF2, and FGF2 is greater in F10 medium. The characterization of these extracted muscle cells thus validates the use of this in vitro system of myogenesis in further studies of the myogenic activity of growth factors in trout.
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Affiliation(s)
- Jean Charles Gabillard
- INRA, UR1037 Station Commune de Recherches en Ichtyophysiologie Biodiversité et Environnement SCRIBE, Equipe Croissance et Qualité de la Chair de Poisson, Campus Beaulieu, 35000 Rennes, France.
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Weil C, Sabin N, Bugeon J, Paboeuf G, Lefèvre F. Differentially expressed proteins in rainbow trout adipocytes isolated from visceral and subcutaneous tissues. Comparative Biochemistry and Physiology Part D: Genomics and Proteomics 2009; 4:235-41. [DOI: 10.1016/j.cbd.2009.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 05/25/2009] [Accepted: 05/25/2009] [Indexed: 01/04/2023]
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Kolditz CI, Paboeuf G, Borthaire M, Esquerré D, SanCristobal M, Lefèvre F, Médale F. Changes induced by dietary energy intake and divergent selection for muscle fat content in rainbow trout (Oncorhynchus mykiss), assessed by transcriptome and proteome analysis of the liver. BMC Genomics 2008; 9:506. [PMID: 18959775 PMCID: PMC2612026 DOI: 10.1186/1471-2164-9-506] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Accepted: 10/29/2008] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Growing interest is turned to fat storage levels and allocation within body compartments, due to their impact on human health and quality properties of farm animals. Energy intake and genetic background are major determinants of fattening in most animals, including humans. Previous studies have evidenced that fat deposition depends upon balance between various metabolic pathways. Using divergent selection, we obtained rainbow trout with differences in fat allocation between visceral adipose tissue and muscle, and no change in overall body fat content. Transcriptome and proteome analysis were applied to characterize the molecular changes occurring between these two lines when fed a low or a high energy diet. We focused on the liver, center of intermediary metabolism and the main site for lipogenesis in fish, as in humans and most avian species. RESULTS The proteome and transcriptome analyses provided concordant results. The main changes induced by the dietary treatment were observed in lipid metabolism. The level of transcripts and proteins involved in intracellular lipid transport, fatty acid biosynthesis and anti-oxidant metabolism were lower with the lipid rich diet. In addition, genes and proteins involved in amino-acid catabolism and proteolysis were also under expressed with this diet. The major changes related to the selection effect were observed in levels of transcripts and proteins involved in amino-acid catabolism and proteolysis that were higher in the fat muscle line than in the lean muscle line. CONCLUSION The present study led to the identification of novel genes and proteins that responded to long term feeding with a high energy/high fat diet. Although muscle was the direct target, the selection procedure applied significantly affected hepatic metabolism, particularly protein and amino acid derivative metabolism. Interestingly, the selection procedure and the dietary treatment used to increase muscle fat content exerted opposite effects on the expression of the liver genes and proteins, with little interaction between the two factors. Some of the molecules we identified could be used as markers to prevent excess muscle fat accumulation.
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Affiliation(s)
- Catherine-Ines Kolditz
- INRA, UMR 1067 Nutrition Aquaculture & Genomics - Pôle d'Hydrobiologie, F-64310 Saint-Pée-sur-Nivelle, France.
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Morzel M, Chambon C, Lefèvre F, Paboeuf G, Laville E. Modifications of trout (Oncorhynchus mykiss) muscle proteins by preslaughter activity. J Agric Food Chem 2006; 54:2997-3001. [PMID: 16608221 DOI: 10.1021/jf0528759] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The effect of two different preslaughter procedures (limited or 15-min intense muscular activity) on muscle trout proteins was investigated. Muscle was sampled 45 min and 24 h post-mortem, proteins were separated using two-dimensional electrophoresis, and spots of interest were tentatively identified by MALDI-TOF spectrometry. Twenty-nine and 4 spots were differentially represented between the two groups of fish at 45 min and 24 h post-mortem, respectively. Spots that could be identified corresponded mainly to proteins involved in energy-producing pathways (triosephosphate isomerase, enolase, pyruvate dehydrogenase) or to structural proteins (desmin, cap-Z, myosin heavy chain fragment). Persistent under-representation of desmin, a key cytoskeletal protein, in fish submitted to intense muscular activity suggests that such a preslaughter treatment can have an effect on post-mortem muscle integrity.
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Affiliation(s)
- Martine Morzel
- Quality of Animal Products, INRA, 63122 St Genès Champanelle, France.
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Castillo J, Le Bail PY, Paboeuf G, Navarro I, Weil C, Fauconneau B, Gutiérrez J. IGF-I binding in primary culture of muscle cells of rainbow trout: changes during in vitro development. Am J Physiol Regul Integr Comp Physiol 2002; 283:R647-52. [PMID: 12184999 DOI: 10.1152/ajpregu.00121.2002] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To characterize and study the variations of IGF-I binding during the development of trout muscle cells, in vitro experiments were conducted using myocyte cultures, and IGF-I binding assays were performed in three stages of cell development: mononuclear cells (day 1), small myotubes (day 4), and large myotubes (day 10). Binding experiments were done by incubating cells with IGF-I for 12 h at 4 degrees C. Specific IGF-I binding increased with the concentration of labeled IGF-I and reached a plateau at 32 pM. The displacement of cold human and trout IGF-I showed a very similar curve (EC(50) = 1.19 +/- 0.05 and 0.95 +/- 0.05 nM, respectively). IGF binding proteins did not interfere significantly because displacement of labeled IGF-I by either cold trout recombinant IGF-I or Des (1-3) IGF-I resulted in similar curves. Insulin did not displace labeled IGF-I even at very high concentrations (>1 microM), which indicates the specificity of IGF-I binding. The amount of receptor (R(0)) increased from 253 +/- 51 fmol/mg DNA on day 1 to 766 +/- 107 fmol/mg DNA on day 10. However, the affinity (K(d)) of IGF-I receptors did not change significantly during this development (from 1.29 +/- 0.19 to 0.79 +/- 0.13 nM). On the basis of our results, we conclude that rainbow trout muscle cells in culture express specific IGF-I receptors, which increase their number with development from mononuclear cells to large myotubes.
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Affiliation(s)
- Juan Castillo
- Departament de Fisiologia, Facultat de Biologia, Universitat de Barcelona, E-08028 Barcelona, Spain
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Abstract
Muscle satellite cells from rainbow trout were exposed in vitro to increasing concentrations of different xenobiotics: copper, dichloroaniline, prochloraz, nonyl-phenol polyethexylate. Mortality and proliferation rate were measured by Hoechst binding and BrdU incorporation. Dose dependent effect of copper on survival and proliferation was observed with an EC50 at 100 microM. A dose dependent effect of nonyl-phenol diethoxylate was observed on survival with an EC50 at 100 microM. This was associated with a biphasic effect on proliferation rate observed both for nonyl-phenol di and poly-ethoxylate: a stimulation of proliferation at low concentration and an inhibition proliferation at large concentration. These effects were related to the inhibition of cells adhesion through the detergent capacity of nonyl-phenol polyethoxylate. The effects of prochloraze and dichloroaniline on cells mortality (EC 50 > 500 microM) and proliferation rate (LOEC: 100 microM) were limited. Whole fish growth, muscle fibre size distribution and satellite cells survival and proliferation were measured on rainbow trout (60-80 g BW) exposed to two concentrations of prochloraze (10 and 100 microg/ml) or nonyl phenol diethoxylate IGEPAL 210 (100 and 400 microg/ml) during 14 and 10 days exposure, respectively. Muscle fibre size distribution and satellite cells proliferation were affected by prochloraz exposure in vivo and this could be related to the alteration in fish feeding status. The exposure to IGEPAL 210 affected the number of satellite cells extracted and induce a biphasic effect on satellite cells proliferation similar to that observed in vivo. The combined exposure to IGEPAL 210 and prochloraze revealed additive effects of these two compounds. The in vivo and in vitro comparison demonstrated that in vitro satellite cells system could be used as a valuable tool to test the effects of pollutants.
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Affiliation(s)
- B Fauconneau
- Department of Hydrobiology and Wildlife, INRA, Campus de Beaulieu, 35042 Cedex, Rennes, France.
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Abstract
The effects of short-term fasting and refeeding were studied on satellite cells extracted from white epaxial muscle of juvenile rainbow trout (1-3 g body weight). In vitro changes in the proliferation of satellite cells were analyzed using bromodeoxyuridine (BrdU) incorporation over a 24-h period. Proliferation in fed control fish was characterized by an initial basal proliferation rate of 5-10% BrdU-labeled nuclei x day(-1), followed by an exponential increase at a rate of +18-20% x day(-1), up to a maximum of 60-70% BrdU-labeled nuclei x day(-1). Characteristics of satellite cells extracted from starved fish, namely extraction yield, morphology, and proliferation, were different from those of fed fish. Fasting (8-10 days) completely suppressed initial proliferation of satellite cells in vitro over a period of 4 days. After this delay, proliferation resumed and changes in proliferation rates over time were similar to those of the control group. In fish fed for 4 days after an 8-day fast, the initial proliferation rate and the changes in proliferation rates over time were completely restored. These findings demonstrate that satellite cells express different behavior depending on feeding status, which could be due to the presence of different satellite cell populations.
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Affiliation(s)
- B Fauconneau
- Fish Growth and Quality, INRA Scribe, Rennes, France
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Fauconneau B, Paboeuf G, Lebail P, Weil C, Houlihan D, Smith R, Guttierez J, Castillo J. In vitro studies of satellite cell behaviour in fish. Comp Biochem Physiol A Mol Integr Physiol 2000. [DOI: 10.1016/s1095-6433(00)80093-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rescan PY, Gauvry L, Paboeuf G. A gene with homology to myogenin is expressed in developing myotomal musculature of the rainbow trout and in vitro during the conversion of myosatellite cells to myotubes. FEBS Lett 1995; 362:89-92. [PMID: 7698359 DOI: 10.1016/0014-5793(95)00215-u] [Citation(s) in RCA: 60] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report the cloning of a new trout myogenic cDNA which encodes helix-loop-helix protein homologous to the myogenic factor myogenin. Northern analyses indicate that trout myogenin (Tmyogenin) transcripts accumulate in large amounts in the myotomal musculature of embryos and frys. In adults, transcripts concentrate within the thin lateral layer of red (slow oxydative) muscle fibres. They are present only in low amounts in white (fast glycolytic) muscle fibres which constitute the major part of the trunk musculature. Using an in vitro myogenesis system, we observed that the trout myogenin encoding gene is not activated until myosatellite cells fuse to generate multinucleated myotubes, indicating that Tmyogenin lies downstream of muscle determination factors. All these observations show that in a major taxinomic group like teleosts, a gene with homology to myogenin exists. Its activation during myogenesis suggests that it acts as a major developmental regulator of muscle differentiation.
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Affiliation(s)
- P Y Rescan
- Laboratoire de physiologie des poissons, INRA, Rennes, France
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Abstract
We have isolated the cDNA encoding a myogenic factor expressed in embryonic trout muscle by hybridization with a Xenopus MyoD cDNA. Nucleotide sequence analysis and amino acid comparison showed that this cDNA called TMyoD encodes a polypeptide of 276 amino acids with 70% identity to the entire Xenopus MyoD protein and 92% identity within the basic and myc-like region. Results from Northern blotting showed that the corresponding transcript is expressed both in adult and embryonic skeletal musculature and in an in vitro myogenesis system, but is undetectable in cardiac and smooth muscles and in non muscle tissues.
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Affiliation(s)
- P Y Rescan
- Laboratoire de Physiologie des Poissons, INRA, Rennes, France
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Prunet P, Gonnard JF, Paboeuf G. GABA-ergic control of prolactin release in rainbow trout (Oncorhynchus mykiss) pituitaries in vitro. Fish Physiol Biochem 1993; 11:131-137. [PMID: 24202469 DOI: 10.1007/bf00004559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The involvement of γ-aminobutyric acid (GABA) in the control of prolactin (PRL) release was investigated in rainbow trout using both perifused pituitary fragments and pituitary cells in primary culture. In our perifusion system, infusion of GABA (10(-6) to 10(-4) M) caused an inhibition of PRL release (between 20 and 40%). Administration on perifused pituitary fragments of 3APS, a GABAa agonist, mimicked this inhibitory effect. Moreover, bicuculline, a specific antagonist of GABAa receptors, totally abolished GABA effect. When tested on cultured pituitary cells during 40h exposure, GABA (10(-5) M) caused a significant decrease in PRL release (24.5%). Baclofen, a specific agonist for GABAb receptor tested at 10(-6) and 10(-5) M, also inhibited PRL released from cultured pituitary cells. These results demonstrate that GABA inhibits PRL release by acting directly on pituitary cells and that probably both types of GABA receptor (a and b) are involved in this regulation.
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Affiliation(s)
- P Prunet
- Laboratoire de Physiologie des Poissons, INRA, campus de Beaulieu, 35042, Rennes cedex, France
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