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@ARTICLE{Kolainac:863912,
author = {Kolašinac, Rejhana and Jaksch, Sebastian and Dreissen,
Georg and Braeutigam, Andrea and Merkel, Rudolf and Csiszar,
Agnes},
title = {{I}nfluence of {E}nvironmental {C}onditions on the {F}usion
of {C}ationic {L}iposomes with {L}iving {M}ammalian {C}ells},
journal = {Nanomaterials},
volume = {9},
number = {7},
issn = {2079-4991},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2019-03877},
pages = {1025 -},
year = {2019},
abstract = {Lipid-based nanoparticles, also called vesicles or
liposomes, can be used as carriers for drugs or many types
of biological macromolecules, including DNA and proteins.
Efficiency and speed of cargo delivery are especially high
for carrier vesicles that fuse with the cellular plasma
membrane. This occurs for lipid mixture containing equal
amounts of the cationic lipid DOTAP and a neutral lipid with
an additional few percents of an aromatic substance. The
fusion ability of such particles depends on lipid
composition with phosphoethanolamine (PE) lipids favoring
fusion and phosphatidyl-choline (PC) lipids endocytosis.
Here, we examined the effects of temperature, ionic
strength, osmolality, and pH on fusion efficiency of
cationic liposomes with Chinese hamster ovary (CHO) cells.
The phase state of liposomes was analyzed by small angle
neutron scattering (SANS). Our results showed that PC
containing lipid membranes were organized in the lamellar
phase. Here, fusion efficiency depended on buffer conditions
and remained vanishingly small at physiological conditions.
In contrast, SANS indicated the coexistence of very small
(~50 nm) objects with larger, most likely lamellar
structures for PE containing lipid particles. The fusion of
such particles to cell membranes occurred with very high
efficiency at all buffer conditions. We hypothesize that the
altered phase state resulted in a highly reduced energetic
barrier against fusion},
cin = {ICS-7 / JCNS-FRM-II},
ddc = {540},
cid = {I:(DE-Juel1)ICS-7-20110106 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31319557},
UT = {WOS:000478992600113},
doi = {10.3390/nano9071025},
url = {https://juser.fz-juelich.de/record/863912},
}