Year: 2024
Type: article
Abstract: Giant unilamellar vesicles (GUVs) are widely used minimal cell models where essential biological features can be reproduced, isolated and studied. Although precise spatio-temporal distribution of membrane domains is a process of crucial importance in living cells, it is still highly challenging to generate anisotropic GUVs with domains at user-defined positions. Here we describe a novel and robust method to control the spatial position of lipid domains of liquid-ordered (Lo)/liquid-disordered (Ld) phase in giant unilamellar vesicles. Our strategy consists in confining Lo/Ld phase-separating GUVs in microfluidic channels to define free curved regions where the minority-phase domains localize and coalesce by decreasing the line energy through domain fusion. We show that this process is governed by the respective fraction of the two phases, and not by the chemical nature of the lipids involved. The spatial position and number of domains are controlled by the design of the confining microchannel and could result in polarized GUVs with a controllable number of poles. The developed method is versatile and user-friendly, while allowing multiple single-vesicle experiments in parallel.
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $5,510
Awards: G1901723455, G2198129000, G2378355896, Paris Sciences et Lettres, G3397776282, G3682299625, G4143648102, G4169909260, G4190806336, G4656594441, G471331628, G6759105742, DNA-encoded REconfigurable and Active Matter, G7240651115, G7376787254, Spatio-temporal control of gene expression by physico-chemical means: from in vitro photocontrol to smart drug delivery, G782245399, G809449587, Dynamic folding and assembly of DNA Origamis: isothermal nanomachines powered by light, G8510727784, G8757790915, G8833087588, G985836816
OpenAlex ID: W4405706079