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@ARTICLE{Schmitt:909775,
author = {Schmitt, Laura Maria and Dreissen, Georg and Kolasinac,
Rejhana and Csiszar, Agnes and Merkel, Rudolf},
title = {{M}embrane tension controls the phase equilibrium in
fusogenic liposomes},
journal = {RSC Advances},
volume = {12},
number = {37},
issn = {2046-2069},
address = {London},
publisher = {RSC Publishing},
reportid = {FZJ-2022-03405},
pages = {24114 - 24129},
year = {2022},
abstract = {Fusogenic liposomes have been widely used for molecule
delivery to cell membranes and cell interior. However, their
physicochemical state is still little understood. We tested
mechanical material behavior by micropipette aspiration of
giant vesicles from fusogenic lipid mixtures and found that
the membranes of these vesicles are fluid and under high
mechanical tension even before aspiration. Based on this
result, we developed a theoretical framework to determine
the area expansion modulus and membrane tension of such
pre-tensed vesicles from aspiration experiments.
Surprisingly high membrane tension of 2.1 mN m−1 and very
low area expansion modulus of 63 mN m−1 were found. We
interpret these peculiar material properties as the result
of a mechanically driven phase transition between the usual
lamellar phase and an, as of now, not finally determined
three dimensional phase of the lipid mixture. The free
enthalpy of transition between these phases is very low,
i.e. on the order of the thermal energy.},
cin = {IBI-2},
ddc = {540},
cid = {I:(DE-Juel1)IBI-2-20200312},
pnm = {5243 - Information Processing in Distributed Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5243},
typ = {PUB:(DE-HGF)16},
pubmed = {36093247},
UT = {WOS:000843638400001},
doi = {10.1039/D2RA04019K},
url = {https://juser.fz-juelich.de/record/909775},
}