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• W2094401898 abstract "(200 words) Oxidation of unsaturated lipids is a fundamental process involved in cell bioenergetics as well as in cell death. Using giant unilamellar vesicles and a chlorin photosensitizer, we asymmetrically oxidized the outer or inner monolayers of lipid membranes. We observed different shape transitions such as oblate to prolate and budding, which are typical of membrane curvature modifications. The asymmetry of the shape transitions is in accordance with a lowered effective spontaneous curvature of the leaflet being targeted. We interpret this effect as a decrease in the preferred area of the targeted leaflet compared to the other, due to the secondary products of oxidation (cleaved-lipids). Permeabilization of giant vesicles by light-induced oxidation is observed after a lag and is characterized in relation with the photosensitizer concentration. We interpret permeabilization as the opening of a pore above a critical membrane tension, resulting from the budding of vesicles. The evolution of photosensitized giant vesicle lysis tension was measured and yields an estimation of the effective spontaneous curvature at lysis. Additionally photo-oxidation was shown to be fusogenic." @default.
• W2094401898 created "2016-06-24" @default.
• W2094401898 creator A5041925489 @default.
• W2094401898 creator A5046365652 @default.
• W2094401898 date "2009-12-01" @default.
• W2094401898 modified "2023-09-30" @default.
• W2094401898 title "Asymmetric Oxidation of Giant Vesicles Triggers Curvature-Associated Shape Transition and Permeabilization" @default.
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• W2094401898 doi "https://doi.org/10.1016/j.bpj.2009.08.056" @default.
• W2094401898 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2785014" @default.
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• W2094401898 hasPublicationYear "2009" @default.
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