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@ARTICLE{Hersch:201132,
author = {Hersch, N. and Wolters, B. and Dreissen, G. and Springer,
R. and Kirchgessner, N. and Merkel, R. and Hoffmann, B.},
title = {{T}he constant beat: cardiomyocytes adapt their forces by
equal contraction upon environmental stiffening},
journal = {Biology open},
volume = {2},
number = {3},
issn = {2046-6390},
address = {Cambridge},
publisher = {Company},
reportid = {FZJ-2015-03437},
pages = {351 - 361},
year = {2013},
abstract = {Cardiomyocytes are responsible for the permanent blood flow
by coordinated heart contractions. This vital function is
accomplished over a long period of time with almost the same
performance, although heart properties, as its elasticity,
change drastically upon aging or as a result of diseases
like myocardial infarction. In this paper we have analyzed
late rat embryonic heart muscle cells' morphology,
sarcomere/costamere formation and force generation patterns
on substrates of various elasticities ranging from ∼1 to
500 kPa, which covers physiological and pathological heart
stiffnesses. Furthermore, adhesion behaviour, as well as
single myofibril/sarcomere contraction patterns, was
characterized with high spatial resolution in the range of
physiological stiffnesses (15 kPa to 90 kPa). Here,
sarcomere units generate an almost stable contraction of
$∼4\%.$ On stiffened substrates the contraction amplitude
remains stable, which in turn leads to increased force
levels allowing cells to adapt almost instantaneously to
changing environmental stiffness. Furthermore, our data
strongly indicate specific adhesion to flat substrates via
both costameric and focal adhesions. The general appearance
of the contractile and adhesion apparatus remains almost
unaffected by substrate stiffness.},
cin = {ICS-7},
ddc = {570},
cid = {I:(DE-Juel1)ICS-7-20110106},
pnm = {453 - Physics of the Cell (POF2-453)},
pid = {G:(DE-HGF)POF2-453},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000209206000012},
pubmed = {pmid:23519595},
doi = {10.1242/bio.20133830},
url = {https://juser.fz-juelich.de/record/201132},
}