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Shayiranbieke A, Liang Q, Wang T, Ma J, Li G, Du X, Zhang G, Wang C, Zhao X. Development of immobilized beta1-adrenoceptor chromatography for rapid discovery of ligands specifically binding to the receptor from herbal extract. J Chromatogr A 2022; 1677:463298. [DOI: 10.1016/j.chroma.2022.463298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/16/2022]
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Kwek JW, Chakraborty S, Kuan KC, Yeo WC, Yin H, Liu CK, Guo L, Zidar J, Li C, Lim FCH. Interactions between poloxamer, PEOx-PPOy-PEOx, and non-ionic surfactant, sucrose monolaurate: A study on potential allergenic effect using model phospholipid membrane. Colloids Surf B Biointerfaces 2021; 209:112153. [PMID: 34673306 DOI: 10.1016/j.colsurfb.2021.112153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 10/04/2021] [Accepted: 10/05/2021] [Indexed: 11/18/2022]
Abstract
Sugar-based surfactants are involved in skin related allergy cases in the past decade. Skin irritation starts with the interaction of the surfactant with the skin lipids leading to lipid emulsification and eventual barrier damage. Polymers or co-surfactants can be used to mitigate the allergenic effect but the mechanism of formulation mildness on skin remains unclear. We have used the quartz crystal microbalance (QCM) together with dissipative particle dynamics (DPD) simulation, small angle x-ray scattering (SAXS) as well as cell viability tests to decipher the interactions between poloxamers and sucrose monolaurate (SML), and how these interactions could prevent the disruption of a model supported phospholipid bilayer (SLB). Poloxamer addition to the SML solution can delay or totally prevent the disruption of the SLB depending on poloxamer type and concentration. Poloxamer P407 (Pluronic® F127) delays the onset of disruption while poloxamer P188 (Pluronic® F68) does not preserve the bilayer integrity even at high concentration of up to 15% w/w. Preservation of the SLB is likely due to the differences in the aggregates formation between SML-F127 and SML-F68 mixtures with corresponding retarded motion of SML micelles through the SML-F127 polymer matrix that improved cell viability.
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Affiliation(s)
- Jin W Kwek
- Institute of Chemical and Engineering Sciences, A⁎STAR, 1 Pesek Road, Jurong Island, 627833, Singapore.
| | - S Chakraborty
- Institute of High Performance Computing, A⁎STAR, 1 Fusionopolis Way, #16-16 Connexis, 138632, Singapore
| | - Kai C Kuan
- Institute of Chemical and Engineering Sciences, A⁎STAR, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Wen C Yeo
- Institute of Chemical and Engineering Sciences, A⁎STAR, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - H Yin
- Department for Technology, Innovation and Enterprise, Singapore Polytechnic, 500 Dover Road, 139651, Singapore
| | - Connie K Liu
- Institute of Chemical and Engineering Sciences, A⁎STAR, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - L Guo
- Institute of Chemical and Engineering Sciences, A⁎STAR, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - J Zidar
- Institute of High Performance Computing, A⁎STAR, 1 Fusionopolis Way, #16-16 Connexis, 138632, Singapore
| | - C Li
- Department for Technology, Innovation and Enterprise, Singapore Polytechnic, 500 Dover Road, 139651, Singapore
| | - Freda C H Lim
- Institute of Chemical and Engineering Sciences, A⁎STAR, 1 Pesek Road, Jurong Island, 627833, Singapore; Institute of High Performance Computing, A⁎STAR, 1 Fusionopolis Way, #16-16 Connexis, 138632, Singapore.
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Surface Grafted MSI-78A Antimicrobial Peptide has High Potential for Gastric Infection Management. Sci Rep 2019; 9:18212. [PMID: 31796755 PMCID: PMC6890677 DOI: 10.1038/s41598-019-53918-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 10/14/2019] [Indexed: 12/20/2022] Open
Abstract
As we approach the end of the antibiotic era, newer therapeutic options, such as antimicrobial peptides (AMPs), are in urgent demand. AMP surface grafting onto biomaterials has been described as a good strategy to overcome problems associated with their in vivo stability. Helicobacter pylori is among the bacteria that pose greatest threat to human health, being MSI-78A one of the few bactericidal AMPs against this bacterium. Here, we report that MSI-78A grafted onto model surfaces (Self-Assembled Monolayers –SAMs), in a concentration of 30.3 ± 1.2 ng/cm2 determined by quartz crystal microbalance with dissipation (QCM-D), was able to kill, by contact, 98% of planktonic H. pylori in only 2 h. This fact was not verified against the control bacteria (Staphylococcus epidermidis), although the minimal inhibitory concentration (MIC) of MSI-78A in solution is much lower for S. epidermidis (2 μg/mL) than for H. pylori (64 μg/mL). Our results also demonstrated that, in opposite to other bacteria, H. pylori cells were attracted to ethylene glycol terminated (antiadhesive) surfaces, which can explain the high bactericidal potential of grafted MSI-78A. This proof of concept study establishes the foundations for development of MSI-78A grafted nanoparticles for gastric infection management within a targeted nanomedicine concept.
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Clifton LA, Paracini N, Hughes AV, Lakey JH, Steinke NJ, Cooper JFK, Gavutis M, Skoda MWA. Self-Assembled Fluid Phase Floating Membranes with Tunable Water Interlayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:13735-13744. [PMID: 31553881 DOI: 10.1021/acs.langmuir.9b02350] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We present a reliable method for the fabrication of fluid phase, unsaturated lipid bilayers by self-assembly onto charged Self-Assembled Monolayer (SAM) surfaces with tunable membrane to surface aqueous interlayers. Initially, the formation of water interlayers between membranes and charged surfaces was characterized using a comparative series of bilayers deposited onto charged, self-assembled monolayers by sequential layer deposition. Using neutron reflectometry, a bilayer to surface water interlayer of ∼8 Å was found between the zwitterionic phospholipid 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) membrane and an anionic carboxyl terminated grafted SAM with the formation of this layer attributed to bilayer repulsion by hydration water on the SAM surface. Furthermore, we found we could significantly reduce the technical complexity of sample fabrication through self-assembly of planar membranes onto the SAM coated surfaces. Vesicle fusion onto carboxyl-terminated monolayers yielded high coverage (>95%) bilayers of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) which floated on a 7-11 Å solution interlayer between the membrane and the surface. The surface to membrane distance was then tuned via the addition of 200 mM NaCl to the bulk solution immersing a POPC floating membrane, which caused the water interlayer to swell reversibly to ∼33 Å. This study reveals that biomimetic membrane models can be readily self-assembled from solution onto functionalized surfaces without the use of polymer supports or tethers. Once assembled, surface to membrane distance can be tailored to the experimental requirements using physiological concentrations of electrolytes. These planar bilayers only very weakly interact with the substrate and are ideally suited for use as biomimetic models for accurate in vitro biochemical and biophysical studies, as well as for technological applications, such as biosensors.
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Affiliation(s)
- Luke A Clifton
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council , Rutherford Appleton Laboratory, Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 OQX , U.K
| | - Nicoló Paracini
- Institute for Cell and Molecular Biosciences , Newcastle University , Framlington Place , Newcastle upon Tyne , NE2 4HH , United Kingdom
| | - Arwel V Hughes
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council , Rutherford Appleton Laboratory, Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 OQX , U.K
| | - Jeremy H Lakey
- Institute for Cell and Molecular Biosciences , Newcastle University , Framlington Place , Newcastle upon Tyne , NE2 4HH , United Kingdom
| | - Nina-Juliane Steinke
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council , Rutherford Appleton Laboratory, Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 OQX , U.K
| | - Joshaniel F K Cooper
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council , Rutherford Appleton Laboratory, Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 OQX , U.K
| | - Martynas Gavutis
- Department of Nanoengineering , Center for Physical Sciences and Technology , Savanoriu ave 231 , LT-02300 Vilnius , Lithuania
| | - Maximilian W A Skoda
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council , Rutherford Appleton Laboratory, Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 OQX , U.K
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Vafaei S, Tabaei SR, Guneta V, Choong C, Cho NJ. Hybrid Biomimetic Interfaces Integrating Supported Lipid Bilayers with Decellularized Extracellular Matrix Components. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3507-3516. [PMID: 29489371 DOI: 10.1021/acs.langmuir.7b03265] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This paper describes the functionalization of solid supported phospholipid bilayer with decellularized extracellular matrix (dECM) components, toward the development of biomimetic platforms that more closely mimic the cell surface environment. The dECM was obtained through a combination of chemical and enzymatic treatments of mouse adipose tissue that contains collagen, fibronectin, and glycosaminoglycans (GAGs). Using amine coupling chemistry, the dECM components were attached covalently to the surface of a supported lipid bilayer containing phospholipids with reactive carboxylic acid headgroups. The bilayer formation and the kinetics of subsequent dECM conjugation were monitored by quartz crystal microbalance with dissipation (QCM-D). Fluorescence recovery after photobleaching (FRAP) confirmed the fluidity of the membrane after functionalization with dECM. The resulting hybrid biomimetic interface supports the attachment and survival of the human hepatocyte Huh 7.5 and maintains the representative hepatocellular function. Importantly, the platform is suitable for monitoring the lateral organization and clustering of cell-binding ligands and growth factor receptors in the presence of the rich biochemical profile of tissue-derived ECM components.
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Affiliation(s)
- Setareh Vafaei
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 Singapore
- Centre for Biomimetic Sensor Science , Nanyang Technological University , 50 Nanyang Drive , 637553 Singapore
| | - Seyed R Tabaei
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 Singapore
- Centre for Biomimetic Sensor Science , Nanyang Technological University , 50 Nanyang Drive , 637553 Singapore
| | - Vipra Guneta
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 Singapore
| | - Cleo Choong
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 Singapore
- KK Research Centre , KK Women's and Children's Hospital , 100 Bukit Timah Road , 229899 Singapore
| | - Nam-Joon Cho
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 Singapore
- Centre for Biomimetic Sensor Science , Nanyang Technological University , 50 Nanyang Drive , 637553 Singapore
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
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Bauve EL, Vernon BC, Ye D, Rogers DM, Siegrist CM, Carson BD, Rempe SB, Zheng A, Kielian M, Shreve AP, Kent MS. Method for measuring the unbinding energy of strongly-bound membrane-associated proteins. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2753-2762. [PMID: 27425029 DOI: 10.1016/j.bbamem.2016.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/23/2016] [Accepted: 07/12/2016] [Indexed: 12/30/2022]
Abstract
We describe a new method to measure the activation energy for unbinding (enthalpy ΔH*u and free energy ΔG*u) of a strongly-bound membrane-associated protein from a lipid membrane. It is based on measuring the rate of release of a liposome-bound protein during centrifugation on a sucrose gradient as a function of time and temperature. The method is used to determine ΔH*u and ΔG*u for the soluble dengue virus envelope protein (sE) strongly bound to 80:20 POPC:POPG liposomes at pH5.5. ΔH*u is determined from the Arrhenius equation whereas ΔG*u is determined by fitting the data to a model based on mean first passage time for escape from a potential well. The binding free energy ΔGb of sE was also measured at the same pH for the initial, predominantly reversible, phase of binding to a 70:30 PC:PG lipid bilayer. The unbinding free energy (20±3kcal/mol, 20% PG) was found to be roughly three times the binding energy per monomer, (7.8±0.3kcal/mol for 30% PG, or est. 7.0kcal/mol for 20% PG). This is consistent with data showing that free sE is a monomer at pH5.5, but assembles into trimers after associating with membranes. This new method to determine unbinding energies should be useful to understand better the complex interactions of integral monotopic proteins and strongly-bound peripheral membrane proteins with lipid membranes.
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Affiliation(s)
| | | | - Dongmei Ye
- Sandia National Laboratories, Albuquerque, NM 87185
| | - David M Rogers
- Department of Chemistry, University of South Florida, 4202 E Fowler Av, Tampa, FL 33620
| | | | | | | | - Aihua Zheng
- Department of Cell Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461
| | - Margaret Kielian
- Department of Cell Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461
| | - Andrew P Shreve
- Center for Biomedical Engineering and Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM 87131
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Spera R, Festa F, Bragazzi NL, Pechkova E, LaBaer J, Nicolini C. Conductometric Monitoring of Protein–Protein Interactions. J Proteome Res 2013; 12:5535-47. [DOI: 10.1021/pr400445v] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Rosanna Spera
- Laboratories
of Biophysics and Nanobiotechnology, Department of Experimental Medicine, University of Genova, Via Pastore 3, 16132, Genova, Italy
| | - Fernanda Festa
- Virginia
G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Nicola L. Bragazzi
- Laboratories
of Biophysics and Nanobiotechnology, Department of Experimental Medicine, University of Genova, Via Pastore 3, 16132, Genova, Italy
| | - Eugenia Pechkova
- Nanoworld Institute, Fondazione EL.B.A. Nicolini, Largo Redaelli 7, 24020, Pradalunga, Bergamo, Italy
- Laboratories
of Biophysics and Nanobiotechnology, Department of Experimental Medicine, University of Genova, Via Pastore 3, 16132, Genova, Italy
| | - Joshua LaBaer
- Virginia
G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Claudio Nicolini
- Nanoworld Institute, Fondazione EL.B.A. Nicolini, Largo Redaelli 7, 24020, Pradalunga, Bergamo, Italy
- Laboratories
of Biophysics and Nanobiotechnology, Department of Experimental Medicine, University of Genova, Via Pastore 3, 16132, Genova, Italy
- Virginia
G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
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