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@ARTICLE{Balduin:1047356,
author = {Balduin, Carina and Qi, Guanxiao and Schöneck, Michael and
Trinkel, Verena and Schemmert, Sarah and Guzman, Gustavo A.
and Bungert-Plümke, Stefanie and Klüssendorf, Malte and
Neumaier, Bernd and Feldmeyer, Dirk and Shah, N. Jon and
Stauber, Tobias and Langen, Karl-Josef and Guzman, Raul E.
and Willuweit, Antje},
title = {{D}isruption of {C}l{C}-3-mediated 2{C}l−/{H}+ exchange
leads to behavioural deficits and thalamic atrophy},
journal = {Scientific reports},
volume = {15},
number = {1},
issn = {2045-2322},
address = {[London]},
publisher = {Springer Nature},
reportid = {FZJ-2025-04252},
pages = {33326},
year = {2025},
note = {Open Access funding enabled and organized by Projekt DEAL.},
abstract = {CLCN3 encodes ClC-3, an endosomal 2Cl⁻/H⁺ exchanger,
with pathogenic variants causing aneurodevelopmental
condition marked by developmental delays, intellectual
disability, seizures,hyperactivity, anxiety, and brain and
retinal abnormalities. Clcn3−/− mice show hippocampal
and retinaldegeneration, recapitulating key symptoms
observed in humans. ClC-3 forms homodimers (ClC-3/ClC-3) and
heterodimers with ClC-4 (ClC-3/ClC-4), with overlapping
brain expression. This suggestsdistinct functional roles for
homo- and heterodimeric assemblies and raises the question
of which brainregions specifically depend on ClC-3/ClC-3
rather than ClC-3/ClC-4 complexes. Using ex vivo PET
traceranalyses, Clcn3−/− and Clcn3td/td mice, we found
neurodegeneration in the hippocampus and thalamusof
Clcn3−/−, while Clcn3td/td mice showed thalamic
degeneration and altered neuronal excitability,including
changes in action potential threshold and after
hyperpolarization. Clcn3td/td mice carryinga
transport-deficient p.E281Q ClC-3 variant that still
associates with ClC-4, thereby allowing ClC-4 tobe sorted to
endosomes as ClC-4/ClC-3 heterodimers, unlike in the
Clcn3−/− model. Clcn3td/td mice alsoexhibited reduced
weight, hyperactivity, and motor deficits, reflecting
clinical features. Lower ClC-4levels in thalamus predict a
predominant thalamic expression of ClC-3/ClC-3 homodimers.
Overall,our findings indicate a region-specific function of
ClC-3/ClC-3 homodimeric complexes and highlightthe
importance of ClC-3 transport activity in thalamic neuron
survival, with electrophysiologicaldysfunction likely
contributing to neurodegeneration.},
cin = {IBI-1 / ETN / INM-10 / INM-4 / IBI-7 / INM-5},
ddc = {600},
cid = {I:(DE-Juel1)IBI-1-20200312 / I:(DE-Juel1)ETN-20090406 /
I:(DE-Juel1)INM-10-20170113 / I:(DE-Juel1)INM-4-20090406 /
I:(DE-Juel1)IBI-7-20200312 / I:(DE-Juel1)INM-5-20090406},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524) / 5253 - Neuroimaging (POF4-525)},
pid = {G:(DE-HGF)POF4-5241 / G:(DE-HGF)POF4-5253},
typ = {PUB:(DE-HGF)16},
doi = {10.1038/s41598-025-19757-2},
url = {https://juser.fz-juelich.de/record/1047356},
}