Behavior of pure and mixed DPPC liposomes spread or adsorbed at the air-water interface

Launois-Surpas, M. A.; Ivanova, Tz.; Panaı̈otov, I.; Proust, J. E.; Puisieux, F.; Georgiev, Georgi

doi:10.1007/bf00657735

Cited by 45 publications

(35 citation statements)

References 20 publications

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“…Thus, adsorption at the air/water interface of the essentially insoluble long-chain PLs involves first a diffusion step of the vesicles to the interface, followed by a reorganization of the PLs of the vesicles to form the interfacial film. [18][19][20] The nature of this film, whether a true monolayer [21,22] or an inhomogeneous superficial mesophase (including bilayers or more complex structures playing the role of "surface-associated reservoirs"), [18,[23][24][25] is still being debated.…”

Section: Introductionmentioning

confidence: 99%

A Nonpolar, Nonamphiphilic Molecule Can Accelerate Adsorption of Phospholipids and Lower Their Surface Tension at the Air/Water Interface

et al. 2011

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The adsorption dynamics of a series of phospholipids (PLs) at the interface between an aqueous solution or dispersion of the PL and a gas phase containing the nonpolar, nonamphiphilic linear perfluorocarbon perfluorohexane (PFH) was studied by bubble profile analysis tensiometry. The PLs investigated were dioctanoylphosphatidylcholine (DiC(8)-PC), dilaurylphosphatidylcholine, dimyristoylphosphatidylcholine, and dipalmitoylphosphatidylcholine. The gas phase consisted of air or air saturated with PFH. The perfluorocarbon gas was found to have an unexpected, strong effect on both the adsorption rate and the equilibrium interfacial tension (γ(eq)) of the PLs. First, for all of the PLs, and at all concentrations investigated, the γ(eq) values were significantly lower (by up to 10 mN m(-1)) when PFH was present in the gas phase. The efficacy of PFH in decreasing γ(eq) depends on the ability of PLs to form micelles or vesicles in water. For vesicles, it also depends on the gel or fluid state of the membranes. Second, the adsorption rates of all the PLs at the interface (as assessed by the time required for the initial interfacial tension to be reduced by 30%) are significantly accelerated (by up to fivefold) by the presence of PFH for the lower PL concentrations. Both the surface-tension reducing effect and the adsorption rate increasing effect establish that PFH has a strong interaction with the PL monolayer and acts as a cosurfactant at the interface, despite the absence of any amphiphilic character. Fitting the adsorption profiles of DiC(8)-PC at the PFH-saturated air/aqueous solution interface with the modified Frumkin model indicated that the PFH molecule lay horizontally at the interface.

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Section: Introductionmentioning

confidence: 99%

A Nonpolar, Nonamphiphilic Molecule Can Accelerate Adsorption of Phospholipids and Lower Their Surface Tension at the Air/Water Interface

et al. 2011

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“…Interfacial techniques have been developed to study the interfacial behaviour of various superstructures like liposomes [20], lipid nanocapsules [21], hen egg yolk low-density lipoproteins [22] and emulsion droplets [23] at the air-water interface. Those data showed that the Langmuir balance can be used as a tool for studying the general organisation, structure and stability of such particles when spread at the air-water interface.…”

Section: Introductionmentioning

confidence: 99%

Effect of surfactant sucrose ester on physical properties of dairy whipped emulsions in relation to those of O/W interfacial layers

Tual¹,

Bourlés²,

Barey³

et al. 2006

Journal of Colloid and Interface Science

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“…Owing to their physiological relevance, the spreading behavior of few phospholipids, also named as lung surfactants, has been subject to several studies [5][6][7][8][9]. While the exact mechanism of adsorption is still a matter for debate today [10][11][12][13], these studies have mostly shown that the adsorption behavior of surfactant from vesicle structures is strongly dependent on the physical state of the vesicle membrane [14][15][16]. Rapid surfactant adsorption, which is a requisite for many biological or technological processes, only occurs if the lipid bilayer is in the liquid-like state at a given temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

Influence of pH on colloidal properties and surface activity of polyglycerol fatty acid ester vesicles

Duerr-Auster

Eisele

Wepf

et al. 2008

Journal of Colloid and Interface Science

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Behavior of pure and mixed DPPC liposomes spread or adsorbed at the air-water interface

Cited by 45 publications

References 20 publications

A Nonpolar, Nonamphiphilic Molecule Can Accelerate Adsorption of Phospholipids and Lower Their Surface Tension at the Air/Water Interface

A Nonpolar, Nonamphiphilic Molecule Can Accelerate Adsorption of Phospholipids and Lower Their Surface Tension at the Air/Water Interface

Effect of surfactant sucrose ester on physical properties of dairy whipped emulsions in relation to those of O/W interfacial layers

Influence of pH on colloidal properties and surface activity of polyglycerol fatty acid ester vesicles

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