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@ARTICLE{Monzel:6444,
author = {Monzel, C. and Fenz, S. and Merkel, R. and Sengupta, K.},
title = {{P}robing {B}io-{M}embrane {D}ynamics by
{D}ual-{W}avelength {R}eflection {I}nterference {C}ontrast
{M}icroscopy},
journal = {ChemPhysChem},
volume = {10},
issn = {1439-4235},
address = {Weinheim},
publisher = {Wiley-VCH Verl.},
reportid = {PreJuSER-6444},
pages = {2828 - 2838},
year = {2009},
note = {We thank Dr. Norbert Kirchgessner and Sebastian Houben for
helpful discussions on Matlab, Norbert Kirchgessner and
Werner Hurttlen for the implementation of the camera
calibration setup, and Nico Hampe for the fabrication of
microstructured SiO<INF>2</INF> wafers. One of the authors
(C. M.) is grateful for the financial support by the
Bonn-Cologne Graduate School.},
abstract = {We present an improved analysis of reflection interference
contrast microscopy (RICM) images, recorded to investigate
model membrane systems that mimic cell adhesion. The model
systems were giant unilamellar vesicles (GUV) adhering via
specific ligand-receptor interactions to supported lipid
bilayers (SLB) or to patterns of receptors. Conventional
RICM and dual-wavelength RICM (DW-RICM) were applied to
measure absolute optical distances between the biomembranes
and planar substrates. We developed algorithms for a
straightforward implementation of an automated,
time-resolved reconstruction of the membrane conformations
from RICM/DW-RICM images, taking into account all the
interfaces in the system and blurring of the data due to
camera noise. Finally, we demonstrate the validity and
usefulness of this new approach by analyzing the topography
and fluctuations of a bound membrane in the steady state and
its dynamic adaptation to osmotic pressure changes. These
measurements clearly show that macroscopic membrane flow
through tightly adhered area is possible in our system.},
keywords = {Algorithms / Microscopy, Interference / Molecular Dynamics
Simulation / Osmotic Pressure / Unilamellar Liposomes:
chemistry / Unilamellar Liposomes (NLM Chemicals) / J
(WoSType)},
cin = {IBN-4},
ddc = {540},
cid = {I:(DE-Juel1)VDB802},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK414},
shelfmark = {Chemistry, Physical / Physics, Atomic, Molecular $\&$
Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:19821476},
UT = {WOS:000272115200011},
doi = {10.1002/cphc.200900645},
url = {https://juser.fz-juelich.de/record/6444},
}