Single-component supported lipid bilayers probed using broadband nonlinear optics

2018 ◽  
Vol 20 (5) ◽  
pp. 3063-3072 ◽  
Author(s):  
Laura L. Olenick ◽  
Hilary M. Chase ◽  
Li Fu ◽  
Yun Zhang ◽  
Alicia C. McGeachy ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Lipid Bilayers ◽  
Single Component ◽  
Supported Lipid Bilayers ◽  
Signal To Noise ◽  
Zwitterionic Lipids ◽  
Scanning Systems

Broadband SFG spectroscopy is shown to offer considerable advantages over scanning systems in terms of signal-to-noise ratios when probing well-formed single-component supported lipid bilayers formed from zwitterionic lipids with PC headgroups.

scholarly journals Perturbation of Hydrogen Bonding Networks over Supported Lipid Bilayers by Poly (Allylamine Hydrochloride)

2019 ◽  
Author(s):  
Naomi Dalchand ◽  
Merve Dogangun ◽  
Paul E. Ohno ◽  
Emily Ma ◽  
Alex Martinson ◽  
...  
Keyword(s):  
Lipid Bilayers ◽  
Electrostatic Interactions ◽  
Supported Lipid Bilayers ◽  
Water Molecules ◽  
Interfacial Water ◽  
Sum Frequency ◽  
Biochemical Processes ◽  
Zwitterionic Lipids ◽  
Allylamine Hydrochloride

<div><div><div><p>Water is vital to many biochemical processes and is necessary for driving many fundamental interactions of cell membranes with their external environments, yet it is difficult to probe the membrane/water interface directly and without the use of external labels. Here, we employ vibrational sum frequency generation (SFG) spectroscopy to understand the role of interfacial water molecules above bilayers formed from zwitterionic (phosphatidylcholine, PC) and anionic (phosphatidylglycerol, PG, and phosphatidylserine, PS) lipids as they are exposed to the common polycation poly (allylamine hydrochloride) (PAH) in 100 mM NaCl. We show that as the concentration of PAH is increased, the interfacial water molecules are irreversibly displaced and find that it requires 10 times more PAH to displace interfacial water molecules from membranes formed from purely zwitterionic lipids when compared to membranes that contain the anionic PG and PS lipids. This outcome is likely due to difference in (1) the energy with which water molecules are bound to the lipid headgroups, (2) the number of water molecules bound to the headgroups, which is related to the headgroup area, and (3) the electrostatic interactions between the PAH molecules and the negatively charged lipids that are favored when compared to the zwitterionic lipid headgroups. The findings presented here contribute to establishing causal relationships in nanotoxicology and to understanding, controlling, and predicting the initial steps that lead to the lysis of cells exposed to membrane disrupting polycations, or to transfection.</p></div></div></div>

scholarly journals Perturbation of Hydrogen Bonding Networks over Supported Lipid Bilayers by Poly (Allylamine Hydrochloride)

2019 ◽  
Author(s):  
Naomi Dalchand ◽  
Merve Dogangun ◽  
Paul E. Ohno ◽  
Emily Ma ◽  
Alex Martinson ◽  
...  
Keyword(s):  
Lipid Bilayers ◽  
Electrostatic Interactions ◽  
Supported Lipid Bilayers ◽  
Water Molecules ◽  
Interfacial Water ◽  
Sum Frequency ◽  
Biochemical Processes ◽  
Zwitterionic Lipids ◽  
Allylamine Hydrochloride

<div><div><div><p>Water is vital to many biochemical processes and is necessary for driving many fundamental interactions of cell membranes with their external environments, yet it is difficult to probe the membrane/water interface directly and without the use of external labels. Here, we employ vibrational sum frequency generation (SFG) spectroscopy to understand the role of interfacial water molecules above bilayers formed from zwitterionic (phosphatidylcholine, PC) and anionic (phosphatidylglycerol, PG, and phosphatidylserine, PS) lipids as they are exposed to the common polycation poly (allylamine hydrochloride) (PAH) in 100 mM NaCl. We show that as the concentration of PAH is increased, the interfacial water molecules are irreversibly displaced and find that it requires 10 times more PAH to displace interfacial water molecules from membranes formed from purely zwitterionic lipids when compared to membranes that contain the anionic PG and PS lipids. This outcome is likely due to difference in (1) the energy with which water molecules are bound to the lipid headgroups, (2) the number of water molecules bound to the headgroups, which is related to the headgroup area, and (3) the electrostatic interactions between the PAH molecules and the negatively charged lipids that are favored when compared to the zwitterionic lipid headgroups. The findings presented here contribute to establishing causal relationships in nanotoxicology and to understanding, controlling, and predicting the initial steps that lead to the lysis of cells exposed to membrane disrupting polycations, or to transfection.</p></div></div></div>

Influence of Brain Gangliosides on the Formation and Properties of Supported Lipid Bilayers for Binding Kinetics Studies

2018 ◽  
Author(s):  
Luke Jordan ◽  
Nathan Wittenberg
Keyword(s):  
Lipid Bilayers ◽  
Binding Kinetics ◽  
Supported Lipid Bilayers ◽  
Dependent Manner ◽  
Concentration Dependent Manner ◽  
Supported Lipid Bilayer ◽  
Head Groups ◽  
Lipid Diffusion ◽  
Kinetics Of ◽  
Brain Gangliosides

This is a comprehensive study of the effects of the four major brain gangliosides (GM1, GD1b, GD1a, and GT1b) on the adsorption and rupture of phospholipid vesicles on SiO2 surfaces for the formation of supported lipid bilayer (SLB) membranes. Using quartz crystal microbalance with dissipation monitoring (QCM-D) we show that gangliosides GD1a and GT1b significantly slow the SLB formation process, whereas GM1 and GD1b have smaller effects. This is likely due to the net ganglioside charge as well as the positions of acidic sugar groups on ganglioside glycan head groups. Data is included that shows calcium can accelerate the formation of ganglioside-rich SLBs. Using fluorescence recovery after photobleaching (FRAP) we also show that the presence of gangliosides significantly reduces lipid diffusion coefficients in SLBs in a concentration-dependent manner. Finally, using QCM-D and GD1a-rich SLB membranes we measure the binding kinetics of an anti-GD1a antibody that has similarities to a monoclonal antibody that is a hallmark of a variant of Guillain-Barre syndrome.

scholarly journals Silica nanoparticle supported lipid bilayers for gene delivery

2009 ◽  
pp. 5100 ◽  
Author(s):  
Juewen Liu ◽  
Alison Stace-Naughton ◽  
C. Jeffrey Brinker
Keyword(s):  
Gene Delivery ◽  
Lipid Bilayers ◽  
Silica Nanoparticle ◽  
Supported Lipid Bilayers

scholarly journals Formation of Supported Lipid Bilayers Derived from Vesicles of Various Compositional Complexity on Conducting Polymer/Silica Substrates

Langmuir ◽  
2021 ◽  
Author(s):  
Hanna Ulmefors ◽  
Josefin Nissa ◽  
Hudson Pace ◽  
Olov Wahlsten ◽  
Anders Gunnarsson ◽  
...  
Keyword(s):  
Lipid Bilayers ◽  
Conducting Polymer ◽  
Supported Lipid Bilayers ◽  
Silica Substrates

scholarly journals Delivery of Ricin Toxin A-Chain by Peptide-Targeted Mesoporous Silica Nanoparticle-Supported Lipid Bilayers

2012 ◽  
Vol 1 (3) ◽  
pp. 348-353 ◽  
Author(s):  
Katharine Epler ◽  
David Padilla ◽  
Genevieve Phillips ◽  
Peter Crowder ◽  
Robert Castillo ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Lipid Bilayers ◽  
Silica Nanoparticle ◽  
Supported Lipid Bilayers ◽  
Toxin A ◽  
Mesoporous Silica Nanoparticle ◽  
Ricin Toxin ◽  
A Chain

scholarly journals Systematic Measurements of Interleaflet Friction in Supported Lipid Bilayers

2021 ◽  
Vol 120 (3) ◽  
pp. 146a
Author(s):  
Autumn A. Anthony ◽  
Aurelia R. Honerkamp-Smith
Keyword(s):  
Lipid Bilayers ◽  
Supported Lipid Bilayers
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