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Fülöp D, Varga Z, Kiss É, Gyulai G. Interfacial Behavior of Biodegradable Poly(lactic- co-glycolic acid)-Pluronic F127 Nanoparticles and Its Impact on Pickering Emulsion Stability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12353-12367. [PMID: 38848254 DOI: 10.1021/acs.langmuir.4c00147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Biodegradable nanoparticle-based emulsions exhibit immense potential in various applications, particularly in the pharmaceutical, cosmetic, and food industries. This study delves into the intricate interfacial behavior of Pluronic F127 modified poly(lactic-co-glycolic acid) (PLGA-F127) nanoparticles, a crucial determinant of their ability to stabilize Pickering emulsions. Employing a combination of Langmuir balance, surface tension, and diffusion coefficient measurements, we investigate the interfacial dynamics of PLGA-F127 nanoparticles under varying temperature and ionic strength conditions. Theoretical calculations are employed to elucidate the underlying mechanisms governing these phenomena. Our findings reveal a profound influence of temperature-dependent Pluronic layer behavior and electrostatic and steric interactions on the interfacial dynamics. Nonlinear changes in surface tension are observed, reflecting the interplay of these factors. Particle aggregation is found to be prevalent at elevated temperatures and ionic strengths, compromising the stability and emulsification efficiency of the formed emulsions. This work provides insights into the rational design of stable and efficient biodegradable nanoparticle-based Pickering emulsions, broadening their potential applications in various fields.
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Affiliation(s)
- Dániel Fülöp
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
- Hevesy György Ph.D. School of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Zoltán Varga
- Biological Nanochemistry Research Group, HUN-REN Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Éva Kiss
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Gergő Gyulai
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
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Polat H, Eren MC, Polat M. The effect of protein BSA on the stability of lipophilic drug (docetaxel)-loaded polymeric micelles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Polat H, Kutluay G, Polat M. Analysis of dilution induced disintegration of micellar drug carriers in the presence of inter and intra micellar species. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124989] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Dopierała K, Krajewska M, Prochaska K. Binding of α-lactalbumin to oleic acid monolayer and its relevance to formation of HAMLET-like complexes. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2018.08.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xu GQ, Hao CC, Zhang L, Chen S, Sun RG. Dynamic Behaviors and Morphology Change of Anionic Phospholipid DPPG Monolayer Caused by Bovine Serum Albumin at Air-Water Interface. CHINESE J CHEM PHYS 2017. [DOI: 10.1063/1674-0068/30/cjcp1703029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Guo-qing Xu
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Chang-chun Hao
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Lei Zhang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Shi Chen
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Run-guang Sun
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
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Schöne AC, Roch T, Schulz B, Lendlein A. Evaluating polymeric biomaterial-environment interfaces by Langmuir monolayer techniques. J R Soc Interface 2017; 14:20161028. [PMID: 28468918 PMCID: PMC5454283 DOI: 10.1098/rsif.2016.1028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/05/2017] [Indexed: 12/18/2022] Open
Abstract
Polymeric biomaterials are of specific relevance in medical and pharmaceutical applications due to their wide range of tailorable properties and functionalities. The knowledge about interactions of biomaterials with their biological environment is of crucial importance for developing highly sophisticated medical devices. To achieve optimal in vivo performance, a description at the molecular level is required to gain better understanding about the surface of synthetic materials for tailoring their properties. This is still challenging and requires the comprehensive characterization of morphological structures, polymer chain arrangements and degradation behaviour. The review discusses selected aspects for evaluating polymeric biomaterial-environment interfaces by Langmuir monolayer methods as powerful techniques for studying interfacial properties, such as morphological and degradation processes. The combination of spectroscopic, microscopic and scattering methods with the Langmuir techniques adapted to polymers can substantially improve the understanding of their in vivo behaviour.
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Affiliation(s)
- Anne-Christin Schöne
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
| | - Toralf Roch
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
- Helmholtz Virtual Institute-Multifunctional Biomaterials for Medicine, Kantstrasse 55, 14513 Teltow, Germany
| | - Burkhard Schulz
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
| | - Andreas Lendlein
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
- Helmholtz Virtual Institute-Multifunctional Biomaterials for Medicine, Kantstrasse 55, 14513 Teltow, Germany
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Gyulai G, Kiss É. Interaction of poly(lactic-co-glycolic acid) nanoparticles at fluid interfaces. J Colloid Interface Sci 2017; 500:9-19. [PMID: 28395164 DOI: 10.1016/j.jcis.2017.03.114] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/30/2017] [Accepted: 03/30/2017] [Indexed: 10/19/2022]
Abstract
HYPOTHESIS Adsorption and localization of nanoparticles at fluid interfaces are key factors in processes like transport through membranes or emulsion stabilization. Adsorption of poly(lactic-co-glycolic acid) (PLGA) and Pluronic coated PLGA nanoparticles (NPs) were studied at three different fluid interfaces. The effect of particle surface modification and type of interface was investigated with the aim of fine tuning interfacial interaction of the nanoparticles. EXPERIMENTS Surface tension measurements were carried out to determine the surface activity and adsorption kinetics of the particles. Particles layers at the air/water interface were further studied using the Langmuir balance technique by recording the surface pressure-area isotherms. Interfacial rheological measurements were performed to characterize the structural properties of the nanoparticle interfacial films. FINDINGS Interfacial adsorption and its kinetics were explained by the diffusion controlled adsorption theory and considering the energy barrier of particle transport to the interface. Surface modification by Pluronic increased the interfacial activity of nanoparticles at all interfaces. Surface activity of PLGA-Pluronic particles could be described by the contributions of both the PLGA NPs and the effective portion of their Pluronic shell. Both particle films present mainly elastic dilatational properties suggesting that particles are in kinetically separated state.
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Affiliation(s)
- Gergő Gyulai
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, Budapest 112, PO Box 32, H-1518 Budapest, Hungary.
| | - Éva Kiss
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, Budapest 112, PO Box 32, H-1518 Budapest, Hungary
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Crawford NF, Micic M, Orbulescu J, Weissbart D, Leblanc RM. Surface chemistry and spectroscopy of the β-galactosidase Langmuir monolayer. J Colloid Interface Sci 2015; 453:202-208. [DOI: 10.1016/j.jcis.2015.04.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/29/2015] [Accepted: 04/29/2015] [Indexed: 01/05/2023]
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Amphiphilic multiblock copolymers of PLLA, PEO and PPO blocks: Synthesis, properties and cell affinity. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.03.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Wu HX, Tan L, Yang MY, Liu CJ, Zhuo RX. Protein-resistance performance of amphiphilic copolymer brushes consisting of fluorinated polymers and polyacrylamide grafted from silicon surfaces. RSC Adv 2015. [DOI: 10.1039/c4ra16036c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A series of random copolymer brushes of acrylamide (AM) and 2-(perfluorinated hexyl)ethyl methacrylate (FMA) were grafted from initiator-functionalized silicon wafers by surface-initiated atom transfer radical polymerization.
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Affiliation(s)
- Hai-Xia Wu
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Lei Tan
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Mei-Yan Yang
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Chuan-Jun Liu
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
| | - Ren-Xi Zhuo
- Key Laboratory of Biomedical Polymers of Ministry of Education
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan
- P. R. China
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Crawford NF, Leblanc RM. Serum albumin in 2D: a Langmuir monolayer approach. Adv Colloid Interface Sci 2014; 207:131-8. [PMID: 24267981 DOI: 10.1016/j.cis.2013.10.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/14/2013] [Accepted: 10/15/2013] [Indexed: 11/24/2022]
Abstract
Understanding of protein interaction at the molecular level raises certain difficulties which is the reason a model membrane system such as the Langmuir monolayer technique was developed. Ubiquitous proteins such as serum albumin comprise 50% of human blood plasma protein content and are involved in many biological functions. The important nature of this class of protein demands that it be studied in detail while modifying the experimental conditions in two dimensions to observe it in all types of environments. While different from bulk colloidal solution work, the two dimensional approach allows for the observation of the interaction between molecules and subphase at the air-water interface. Compiled in this review are studies which highlight the characterization of this protein using various surroundings and also observing the types of interactions it would have when at the biomembrane interface. Free-energy changes between molecules, packing status of the bulk analyte at the interface as well as phase transitions as the monolayer forms a more organized or aggregated state are just some of the characteristics which are observed through the Langmuir technique. This unique methodology demonstrates the chemical behavior and physical behavior of this protein at the phase boundary throughout the compression of the monolayer.
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Gyulai G, Pénzes C, Mohai M, Csempesz F, Kiss É. Influence of surface properties of polymeric nanoparticles on their membrane affinity. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.02.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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RETRACTED ARTICLE Recent progress in AFM studies of biodegradable poly(lactic acid) materials. CHINESE SCIENCE BULLETIN-CHINESE 2012. [DOI: 10.1007/s11434-012-5052-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kiss É, Heine ET, Hill K, He YC, Keusgen N, Pénzes CB, Schnöller D, Gyulai G, Mendrek A, Keul H, Moeller M. Membrane Affinity and Antibacterial Properties of Cationic Polyelectrolytes With Different Hydrophobicity. Macromol Biosci 2012; 12:1181-9. [DOI: 10.1002/mabi.201200078] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 05/07/2012] [Indexed: 11/06/2022]
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Kiss É, Schnöller D, Pribranská K, Hill K, Pénzes CB, Horváti K, Bősze S. Nanoencapsulation of Antitubercular Drug Isoniazid and Its Lipopeptide Conjugate. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691.2011.616128] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Gyulai G, Pénzes C, Mohai M, Lohner T, Petrik P, Kurunczi S, Kiss É. Interfacial properties of hydrophilized poly(lactic-co-glycolic acid) layers with various thicknesses. J Colloid Interface Sci 2011; 362:600-6. [DOI: 10.1016/j.jcis.2011.06.055] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 06/21/2011] [Accepted: 06/23/2011] [Indexed: 10/18/2022]
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Paillard-Giteau A, Tran V, Thomas O, Garric X, Coudane J, Marchal S, Chourpa I, Benoît J, Montero-Menei C, Venier-Julienne M. Effect of various additives and polymers on lysozyme release from PLGA microspheres prepared by an s/o/w emulsion technique. Eur J Pharm Biopharm 2010; 75:128-36. [DOI: 10.1016/j.ejpb.2010.03.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Revised: 03/01/2010] [Accepted: 03/06/2010] [Indexed: 10/19/2022]
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Tan LT, Holthoff WG, Steves JM, Bright FV. Probe-dependent microenvironments within biodegradable films formed from poly(l-lactic acid) and pluronic 104. APPLIED SPECTROSCOPY 2010; 64:359-364. [PMID: 20412618 DOI: 10.1366/000370210791114266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report on the local microenvironment surrounding three small fluorescent probe molecules (pyrene, [6-propionyl-2-(N,N-dimethylamino) naphthalene] (PRODAN), and [4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran] (DCM)) when they are sequestered at low concentration within thin biodegradable films formed from poly( L-lactic acid) (PLLA) and Pluronic P104 blends. Despite each probe molecule being neutral, they sense and report from much different microenvironments in comparison to each other. Specifically, the non-polar pyrene probe senses a slightly more polar microenvironment as the PLLA content in the polymer blend increases. In contrast, the polar PRODAN and DCM probes sense less polar microenvironments as the PLLA content within the polymer blend increases. Time-resolved fluorescence intensity decay experiments on pure PLLA films reveal that each probe molecule encounters significant heterogeneity. Pyrene emits simultaneously from three discrete microenvironments. This is consistent with pyrene molecules reporting from crystalline, amorphous-crystalline intermediate, and amorphous regions. PRODAN and DCM appear to emit from a continuum of microenvironments. These results have ramifications on the performance of biodegradable drug delivery platforms loaded with small drug molecules.
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Affiliation(s)
- Loraine T Tan
- Department of Chemistry, 85 Lomb Memorial Drive, Rochester Institute of Technology, Rochester, New York 14623-5603, USA
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Guillemin Y, Lopez J, Gimenez D, Fuertes G, Valero JG, Blum L, Gonzalo P, Salgado J, Girard-Egrot A, Aouacheria A. Active fragments from pro- and antiapoptotic BCL-2 proteins have distinct membrane behavior reflecting their functional divergence. PLoS One 2010; 5:e9066. [PMID: 20140092 PMCID: PMC2816717 DOI: 10.1371/journal.pone.0009066] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Accepted: 01/17/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The BCL-2 family of proteins includes pro- and antiapoptotic members acting by controlling the permeabilization of mitochondria. Although the association of these proteins with the outer mitochondrial membrane is crucial for their function, little is known about the characteristics of this interaction. METHODOLOGY/PRINCIPAL FINDINGS Here, we followed a reductionist approach to clarify to what extent membrane-active regions of homologous BCL-2 family proteins contribute to their functional divergence. Using isolated mitochondria as well as model lipid Langmuir monolayers coupled with Brewster Angle Microscopy, we explored systematically and comparatively the membrane activity and membrane-peptide interactions of fragments derived from the central helical hairpin of BAX, BCL-xL and BID. The results show a connection between the differing abilities of the assayed peptide fragments to contact, insert, destabilize and porate membranes and the activity of their cognate proteins in programmed cell death. CONCLUSION/SIGNIFICANCE BCL-2 family-derived pore-forming helices thus represent structurally analogous, but functionally dissimilar membrane domains.
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Affiliation(s)
- Yannis Guillemin
- Institut de Biologie et Chimie des Protéines (IBCP), CNRS UMR5086, University of Lyon, Lyon, France
| | - Jonathan Lopez
- Institut de Biologie et Chimie des Protéines (IBCP), CNRS UMR5086, University of Lyon, Lyon, France
| | - Diana Gimenez
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Valencia, España
| | - Gustavo Fuertes
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Valencia, España
| | - Juan Garcia Valero
- Institut de Biologie et Chimie des Protéines (IBCP), CNRS UMR5086, University of Lyon, Lyon, France
| | - Loïc Blum
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), CNRS UMR5246, University of Lyon, Villeurbanne, France
| | - Philippe Gonzalo
- Institut de Biologie et Chimie des Protéines (IBCP), CNRS UMR5086, University of Lyon, Lyon, France
| | - Jesùs Salgado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Valencia, España
- Departamento de Bioquímica y Biología Molecular, Universidad de Valencia, Burjassot, Valencia, España
| | - Agnès Girard-Egrot
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), CNRS UMR5246, University of Lyon, Villeurbanne, France
| | - Abdel Aouacheria
- Institut de Biologie et Chimie des Protéines (IBCP), CNRS UMR5086, University of Lyon, Lyon, France
- * E-mail:
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Kiss E, Kutnyánszky E, Bertóti I. Modification of poly(lactic/glycolic acid) surface by chemical attachment of poly(ethylene glycol). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1440-1444. [PMID: 20058932 DOI: 10.1021/la903373g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Biodegradable polyesters such poly(lactic acid) and poly(lactic/glycolic acid) (PLGA) copolymers are preferred biomaterials and used among others as drug delivery systems, although their surface hydrophobicity limits their application. In this work, chemical modification of the PLGA surface was developed by coupling of either linear or starlike poly(ethylene glycol) (PEG) molecules via chemical bonds to the PLGA surface following amino functionalization as a first step to improve its biocompatibility. The chemical attachment was followed by detailed X-ray photoelectron spectroscopy (XPS) studies. It was shown that substantial modification can be achieved by linear PEG, but even higher surface coverage with hydrophilic groups can be obtained when the six-armed PEG is applied with the additional advantage of possible further functionalization via free amino groups available on the surface of the latter. As a final goal, a significant increase of water wettability together with reduced protein adsorption was achieved on PEG-coupled PLGA surfaces.
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Affiliation(s)
- E Kiss
- Laboratory of Interfaces and Nanostructures, Institute of Chemistry, Eötvös Loránd University, Budapest 112, POB. 32, H-1518 Hungary.
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Hill K, Pénzes CB, Schnöller D, Horváti K, Bősze S, Hudecz F, Keszthelyi T, Kiss É. Characterisation of the membrane affinity of an isoniazide peptide conjugate by tensiometry, atomic force microscopy and sum-frequency vibrational spectroscopy, using a phospholipid Langmuir monolayer model. Phys Chem Chem Phys 2010; 12:11498-506. [DOI: 10.1039/c002737e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Glomm WR, Volden S, Halskau Ø, Ese MHG. Same system-different results: the importance of protein-introduction protocols in Langmuir-monolayer studies of lipid-protein interactions. Anal Chem 2009; 81:3042-50. [PMID: 19317454 DOI: 10.1021/ac8027257] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For studies of protein-lipid interactions, thin films at the air-water surface are often employed as model systems for cell membranes. A convenient manner in which to study these interactions is the Langmuir technique, which allows for formation of monolayer phospholipid films together with a choice of where and how to introduce proteins, according to the desired response variable. Here, a distinction has been made between different interaction protocols and it is also commented upon to what extent introduction of protein to a solution prior to spreading of a lipid film affects the results. This paper describes commonly used methods when working with Langmuir monolayers as membrane mimics and compares the results of four different experimental protocols: formation of a lipid film on top of a protein-containing subphase, injection of protein under an existing, semicompressed phospholipid film (surface pressure 5 mN/m), and deposition of a protein solution on top of a lipid film contained at either surface pressure 0 mN/m or at surface pressure 5 mN/m. Results obtained from Langmuir isotherms and Brewster angle microscope clearly differentiate between these methods and give insight into under which conditions and at which interfaces the protein interactions are predominant (protein-air or protein-lipid).
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Affiliation(s)
- Wilhelm R Glomm
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
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