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@ARTICLE{Bohmbach:283021,
author = {Bohmbach, Kirsten and Bauer, Vincent and Henneberger,
Christian},
title = {{G}lycine and glycine transport control dendritic
excitability and spiking.},
journal = {Progress in neurobiology},
volume = {256},
issn = {0301-0082},
address = {Jena},
publisher = {Elsevier},
reportid = {DZNE-2025-01433},
pages = {102856},
year = {2025},
abstract = {Neuronal dendrites integrate excitatory input. They can
perform local computations such as coincidence detection by
amplifying synchronized local input and dendritic spiking.
Extracellular glycine could be a powerful modulator of such
processes through its action as a co-agonist at glutamate
receptors of the N-methyl-D-aspartate (NMDA) subtype but
also as a ligand of inhibitory glycine receptors (GlyRs).
Similarly, glycine transporters (GlyTs), an emerging drug
target for psychiatric and other diseases, could control
dendritic integration through ambient glycine levels. Both
hypotheses were tested at dendrites of CA1 pyramidal cells
in acute hippocampal slices by pharmacologically analysing
how glycine, GlyTs and GlyRs change the postsynaptic
response to local dendritic excitatory input. Using
microiontophoretic glutamate application, we found that
glycine can indeed significantly increase dendritic
excitability and dendritic spiking. We also uncovered that
GlyTs are powerful modulators of dendritic spiking, which
can limit the impact of glycine sources on CA1 pyramidal
cells. Our experiments also revealed that GlyRs can have an
opposite, inhibitory effect on the slow dendritic spike
component. This directly demonstrates that glycine can
dynamically enhance dendritic responsiveness to local input
and promote dendritic spiking, while GlyTs and GlyRs have an
opposing effect. Together, this makes glycinergic signalling
a powerful modulator of the nonlinear integration of
synaptic input in CA1 radial oblique dendrites.},
keywords = {D-serine (Other) / Dendritic excitability (Other) /
Dendritic spiking (Other) / Glycine (Other) / Glycine
transport (Other) / Hippocampus (Other) /
N-methyl-D-aspartate receptors (Other)},
cin = {AG Henneberger},
ddc = {610},
cid = {I:(DE-2719)1013029},
pnm = {351 - Brain Function (POF4-351)},
pid = {G:(DE-HGF)POF4-351},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:41297659},
doi = {10.1016/j.pneurobio.2025.102856},
url = {https://pub.dzne.de/record/283021},
}