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@ARTICLE{Kleusch:885997,
author = {Kleusch, Christian and Monzel, Cornelia and Sridhar,
Krishna Chander and Hoffmann, Bernd and Csiszár, Agnes and
Merkel, Rudolf},
title = {{F}luorescence {C}orrelation {S}pectroscopy {R}eveals
{I}nteraction of {S}ome {M}icrodomain-{A}ssociated {L}ipids
with {C}ellular {F}ocal {A}dhesion {S}ites},
journal = {International journal of molecular sciences},
volume = {21},
number = {21},
issn = {1422-0067},
address = {Basel},
publisher = {Molecular Diversity Preservation International},
reportid = {FZJ-2020-04219},
pages = {8149 -},
year = {2020},
abstract = {Cells adhere to the extracellular matrix at distinct
anchoring points, mostly focal adhesions. These are rich in
immobile transmembrane- and cytoskeletal-associated
proteins, some of which are known to interact with lipids of
the plasma membrane. To investigate their effect on lipid
mobility and molecular interactions, fluorescently labeled
lipids were incorporated into the plasma membranes of
primary myofibroblasts using fusogenic liposomes. With
fluorescence correlation spectroscopy, we tested mobilities
of labeled microdomain-associated lipids such as
sphingomyelin (SM), ganglioside (GM1), and cholesterol as
well as of a microdomain-excluded phospholipid (PC) and a
lipid-like molecule (DiIC18(7)) in focal adhesions (FAs) and
in neighboring non-adherent membrane areas. We found
significantly slower diffusion of SM and GM1 inside FAs but
no effect on cholesterol, PC, and DiIC18(7). These data were
compared to the molecular behavior in Lo/Ld-phase separated
giant unilamellar vesicles, which served as a model system
for microdomain containing lipid membranes. In contrast to
the model system, lipid mobility changes in FAs were
molecularly selective, and no particle enrichment occurred.
Our findings suggest that lipid behavior in FAs cannot be
described by Lo/Ld-phase separation. The observed slow-down
of some molecules in FAs is potentially due to transient
binding between lipids and some molecular constituent(s).},
cin = {IBI-2},
ddc = {540},
cid = {I:(DE-Juel1)IBI-2-20200312},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33142729},
UT = {WOS:000588962900001},
doi = {10.3390/ijms21218149},
url = {https://juser.fz-juelich.de/record/885997},
}