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@ARTICLE{Kovermann:874374,
author = {Kovermann, Peter and Untiet, Verena and Kolobkova, Yulia
and Engels, Miriam and Baader, Stephan and Schilling, Karl
and Fahlke, Christoph},
title = {{I}ncreased glutamate transporter-associated anion currents
cause glial apoptosis in episodic ataxia 6},
journal = {Brain communications},
volume = {2},
number = {1},
issn = {2632-1297},
address = {[Großbritannien]},
publisher = {Guarantors of Brain},
reportid = {FZJ-2020-01396},
pages = {fcaa022},
year = {2020},
abstract = {Episodic ataxia type 6 is an inherited neurological
condition characterized by combined ataxia and epilepsy. A
severe form of this disease with episodes combining ataxia,
epilepsy and hemiplegia was recently associated with a
proline to arginine substitution at position 290 of the
excitatory amino acid transporter 1 in a heterozygous
patient. The excitatory amino acid transporter 1 is the
predominant glial glutamate transporter in the cerebellum.
However, this glutamate transporter also functions as an
anion channel and earlier work in heterologous expression
systems demonstrated that the mutation impairs the glutamate
transport rate, while increasing channel activity. To
understand how these changes cause ataxia, we developed a
constitutive transgenic mouse model. Transgenic mice display
epilepsy, ataxia and cerebellar atrophy and, thus, closely
resemble the human disease. We observed increased
glutamate-activated chloride efflux in Bergmann glia that
triggers the apoptosis of these cells during infancy. The
loss of Bergmann glia results in reduced glutamate uptake
and impaired neural network formation in the cerebellar
cortex. This study shows how gain-of-function of glutamate
transporter-associated anion channels causes ataxia through
modifying cerebellar development.},
cin = {ICS-4},
ddc = {610},
cid = {I:(DE-Juel1)ICS-4-20110106},
pnm = {553 - Physical Basis of Diseases (POF3-553)},
pid = {G:(DE-HGF)POF3-553},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32954283},
UT = {WOS:000574931600022},
doi = {10.1093/braincomms/fcaa022},
url = {https://juser.fz-juelich.de/record/874374},
}