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@ARTICLE{Nascimento:273977,
author = {Nascimento, Filipe and Özyurt, M Görkem and Halablab,
Kareen and Bhumbra, Gardave Singh and Caron, Guillaume and
Bączyk, Marcin and Zytnicki, Daniel and Manuel, Marin and
Roselli, Francesco and Brownstone, Rob and Beato, Marco},
title = {{S}pinal microcircuits go through multiphasic homeostatic
compensations in a mouse model of motoneuron degeneration.},
journal = {Cell reports},
volume = {43},
number = {12},
issn = {2211-1247},
address = {[New York, NY]},
publisher = {Elsevier},
reportid = {DZNE-2024-01426},
pages = {115046},
year = {2024},
abstract = {In many neurological conditions, early-stage neural circuit
adaptation preserves relatively normal behavior. In some
diseases, spinal motoneurons progressively degenerate yet
movement remains initially preserved. This study
investigates whether these neurons and associated
microcircuits adapt in a mouse model of progressive
motoneuron degeneration. Using a combination of in vitro and
in vivo electrophysiology and super-resolution microscopy,
we find that, early in the disease, neurotransmission in a
key pre-motor circuit, the recurrent inhibition mediated by
Renshaw cells, is reduced by half due to impaired quantal
size associated with decreased glycine receptor density.
This impairment is specific and not a widespread feature of
spinal inhibitory circuits. Furthermore, it recovers at
later stages of disease. Additionally, an increased
probability of release from proprioceptive afferents leads
to increased monosynaptic excitation of motoneurons. We
reveal that, in this motoneuron degenerative condition,
spinal microcircuits undergo specific multiphasic
homeostatic compensations that may contribute to
preservation of force output.},
keywords = {Animals / Motor Neurons: metabolism / Motor Neurons:
pathology / Mice / Homeostasis / Disease Models, Animal /
Spinal Cord: pathology / Spinal Cord: metabolism / Synaptic
Transmission: physiology / Receptors, Glycine: metabolism /
Nerve Degeneration: pathology / Mice, Inbred C57BL / Renshaw
Cells: metabolism / ALS (Other) / CP: Cell biology (Other) /
CP: Neuroscience (Other) / Renshaw cells (Other) /
electrophysiology (Other) / glycine receptors (Other) /
motoneurons (Other) / motor control (Other) / quantal
analysis (Other) / sensory afferents (Other) / spinal cord
(Other)},
cin = {AG Roselli},
ddc = {610},
cid = {I:(DE-2719)1910001},
pnm = {352 - Disease Mechanisms (POF4-352)},
pid = {G:(DE-HGF)POF4-352},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39656589},
doi = {10.1016/j.celrep.2024.115046},
url = {https://pub.dzne.de/record/273977},
}