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@ARTICLE{Kugler:844884,
author = {Kugler, Eva Maria and Michel, Klaus and Kirchenbüchler,
David and Dreissen, Georg and Csiszár, Agnes and Merkel,
Rudolf and Schemann, Michael and Mazzuoli-Weber, Gemma},
title = {{S}ensitivity to {S}train and {S}hear {S}tress of
{I}solated {M}echanosensitive {E}nteric {N}eurons},
journal = {Neuroscience},
volume = {372},
issn = {0306-4522},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2018-02230},
pages = {213 - 224},
year = {2018},
abstract = {Within the enteric nervous system, the neurons in charge to
control motility of the gastrointestinal tract reside in a
particular location nestled between two perpendicular muscle
layers which contract and relax. We used primary cultured
myenteric neurons of male guinea pigs to study
mechanosensitivity of enteric neurons in isolation.
Ultrafast Neuroimaging with a voltage-sensitive dye
technique was used to record neuronal activity in response
to shear stress and strain. Strain was induced by locally
deforming the elastic cell culture substrate next to a
neuron. Measurements showed that substrate strain was mostly
elongating cells. Shear stress was exerted by hydrodynamic
forces in a microchannel. Both stimuli induced excitatory
responses. Strain activated $14\%$ of the stimulated
myenteric neurons that responded with a spike frequency of
1.9 (0.7/3.2) Hz, whereas shear stress excited only a few
neurons $(5.6\%)$ with a very low spike frequency of 0
(0/0.6) Hz. Thus, shear stress does not seem to be an
adequate stimulus for mechanosensitive enteric neurons (MEN)
while strain activates enteric neurons in a relevant manner.
Analyzing the adaptation behavior of MEN showed that shear
stress activated rapidly/slowly/ultraslowly adapting MEN
$(2/62/36\%)$ whereas strain only slowly $(46\%)$ and
ultraslowly $(54\%)$ MEN. Paired experiments with strain and
normal stress revealed three mechanosensitive enteric
neuronal populations: one strain-sensitive $(37\%),$ one
normal stress-sensitive $(17\%)$ and one strain- and
stress-sensitive $(46\%).These$ results indicate that shear
stress does not play a role in the neuronal control of
motility but normal stress and strain.},
cin = {ICS-7},
ddc = {610},
cid = {I:(DE-Juel1)ICS-7-20110106},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29317262},
UT = {WOS:000425878100017},
doi = {10.1016/j.neuroscience.2017.12.052},
url = {https://juser.fz-juelich.de/record/844884},
}