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• W2963019187 abstract "We establish a biophysical model for the dynamics of lipid vesicles exposed to surfactants. The solubilization of the lipid membrane due to the insertion of surfactant molecules induces a reduction of membrane surface area at almost constant vesicle volume. This results in a rate-dependent increase of membrane tension and leads to the opening of a micron-sized pore. We show that solubilization kinetics due to surfactants can determine the regime of pore dynamics: either the pores open and reseal within a second (short-lived pore), or the pore stays open up to a few minutes (long-lived pore). First, we validate our model with previously published experimental measurements of pore dynamics. Then, we investigate how the solubilization kinetics and membrane properties affect the dynamics of the pore and construct a phase diagram for short and long-lived pores. Finally, we examine the dynamics of sequential pore openings and show that cyclic short-lived pores occur with a period inversely proportional to the solubilization rate. By deriving a theoretical expression for the cycle period, we provide an analytical tool to estimate the solubilization rate of lipid vesicles by surfactants. Our findings shed light on some fundamental biophysical mechanisms that allow simple cell-like structures to sustain their integrity against environmental stresses, and have the potential to aid the design of vesicle-based drug delivery systems. This article is part of a Special Issue entitled: Emergence of Complex Behavior in Biomembranes edited by Marjorie Longo." @default.
• W2963019187 created "2019-07-30" @default.
• W2963019187 creator A5035455341 @default.
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• W2963019187 date "2018-10-01" @default.
• W2963019187 modified "2023-10-15" @default.
• W2963019187 title "Solubilization kinetics determines the pulsatory dynamics of lipid vesicles exposed to surfactant" @default.
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• W2963019187 doi "https://doi.org/10.1016/j.bbamem.2018.03.016" @default.
• W2963019187 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29572034" @default.
• W2963019187 hasPublicationYear "2018" @default.
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