Reverse Vesicles: Counter Structure of Biological Membranes

Kunieda, H.; Akimaru, Mikuo; Ushio, Noriaki; Nakamura, Kazuyoshi

doi:10.1006/jcis.1993.1137

Cited by 27 publications

(15 citation statements)

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“…Another interesting type of structures are the so-called reverse vesicles, in which the bulk and the vesicle pool contain an organic solvent and the surfactant polar headgroups contact a thin water layer [78][79][80][81][82]. Here the separating layer is formed by the polar media (surfactant headgroups plus water).…”

Section: Structure Dynamics and Composition Of Vesiclesmentioning

confidence: 99%

Polymer–vesicle association

Antunes¹,

Marques²,

Miguel³

et al. 2009

Advances in Colloid and Interface Science

114

128

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Mixed polymer-surfactant systems have been intensively investigated in the last two decades, with the main focus on surfactant micelles as the surfactant aggregate in interaction. The main types of phase behavior, driving forces and structural/rheological effects at stake are now fairly well understood. Polymer-vesicle systems, on the other hand, have received comparatively less attention from a physico-chemical perspective. In this review, our main goal has been to bridge this gap, taking a broad approach to cover a field that is in clear expansion, in view of its multiple implications for colloid and biological sciences and in applied areas. We start by a general background on amphiphile self-assembly and phase separation phenomena in mixed polymer-surfactant solutions. We then address vesicle formation, properties and stability not only in classic lipids, but also in various other surfactant systems, among which catanionic vesicles are highlighted. Traditionally, lipid and surfactant vesicles have been studied separately, with little cross-information and comparison, giving duplication of physico-chemical interpretations. This situation has changed in more recent times. We then proceed to cover more in-depth the work done on different aspects of the associative behavior between vesicles (of different composition and type of stability) and different types of polymers, including polysaccharides, proteins and DNA. Thus, phase behavior features, effects of vesicle structure and stability, and the forces/mechanisms of vesicle-macromolecule interaction are addressed. Such association may generate gels with interesting rheological properties and high potential for applications. Finally, special focus is also given to DNA, a high charge polymer, and its interactions with surfactants, and vesicles, in particular, in the context of gene transfection studies.

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Section: Structure Dynamics and Composition Of Vesiclesmentioning

confidence: 99%

Polymer–vesicle association

Antunes¹,

Marques²,

Miguel³

et al. 2009

Advances in Colloid and Interface Science

114

128

View full text Add to dashboard Cite

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“…Such structures are known to occur in the laboratory, and have been extensively characterized in systems composed of phospholipid surfactants in high‐molecular‐weight hydrocarbons and non‐polar liquids, such as cyclohexane, hexane, toluene and chloroform, at room temperature (e.g. Tung et al 2008, Kunieda et al 1993a, 1993b, 1994, Li and Hao 2007, Nakamura et al 1995). Reverse vesicles are excellent candidate analogues for cell membranes that could maintain a hydrocarbon‐based cyctoplasm in a hydrocarbon liquid medium.…”

Section: Possible Biochemistries Of Life On Titanmentioning

confidence: 99%

Is there life on … Titan?

Norman

2011

Astronomy &Amp; Geophysics

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“…In contrast, Kunieda et al described the addition of hexanol as a prerequisite to form RVs of sucrose ester. 17 Stabilizing factors can facilitate the formation of hydrogen bonds between the polar headgroups of the surfactants (hydrophilic stabilizing factors) or lower the so-called hydrocarbon packing stress (lipophilic stabilizing factors). 19 Examples of hydrophilic and lipophilic stabilizing factors are water and cholesterol, respectively.…”

Section: Vesicle Formation and Stabilitymentioning

confidence: 99%

“…15 Nakamura et al described the preparation of RVs of sucrose esters, hexaethylene glycol hexadecyl ether, and water in decane. 16,17 In these studies, freeze-fracture electron microscopy, light scattering, and small-angle X-ray scattering were employed to characterize the RVs.…”

Section: Introductionmentioning

confidence: 99%