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@ARTICLE{Koch:863891,
author = {Koch, Angela and Bonus, Michele and Gohlke, Holger and
Klöcker, Nikolaj},
title = {{I}soform-specific {I}nhibition of {N}-methyl-{D}-aspartate
{R}eceptors by {B}ile {S}alts},
journal = {Scientific reports},
volume = {9},
number = {1},
issn = {2045-2322},
address = {[London]},
publisher = {Macmillan Publishers Limited, part of Springer Nature},
reportid = {FZJ-2019-03862},
pages = {10068},
year = {2019},
abstract = {The N-methyl-D-aspartate subfamily of ionotropic glutamate
receptors (NMDARs) is well known for its important roles in
the central nervous system (CNS), e.g. learning and memory
formation. Besides the CNS, NMDARs are also expressed in
numerous peripheral tissues including the pancreas, kidney,
stomach, and blood cells, where an understanding of their
physiological and pathophysiological roles is only evolving.
Whereas subunit composition increases functional diversity
of NMDARs, a great number of endogenous cues tune receptor
signaling. Here, we characterized the effects of the steroid
bile salts cholate and chenodeoxycholate (CDC) on
recombinantly expressed NMDARs of defined molecular
composition. CDC inhibited NMDARs in an isoform-dependent
manner, preferring GluN2D and GluN3B over GluN2A and GluN2B
receptors. Determined IC50 values were in the range of bile
salt serum concentrations in severe cholestatic disease
states, pointing at a putative pathophysiological
significance of the identified receptor modulation. Both
pharmacological and molecular simulation analyses indicate
that CDC acts allosterically on GluN2D, whereas it competes
with agonist binding on GluN3B receptors. Such differential
modes of inhibition may allow isoform-specific targeted
interference with the NMDAR/bile salt interaction. In
summary, our study provides further molecular insight into
the modulation of NMDARs by endogenous steroids and points
at a putative pathophysiological role of the receptors in
cholestatic disease.},
cin = {NIC / JSC / ICS-6},
ddc = {600},
cid = {I:(DE-Juel1)NIC-20090406 / I:(DE-Juel1)JSC-20090406 /
I:(DE-Juel1)ICS-6-20110106},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511) / Forschergruppe Gohlke $(hkf7_20170501)$ /
Energetic and structural characterization of the activation
processes of the human HCN2 ion channel $(hdd17_20180501)$ /
Disinhibition and inhibition of HCN2 channel function by
ligand binding to the cyclic nucleotide bin
$(hdd17_20170501)$},
pid = {G:(DE-HGF)POF3-511 / $G:(DE-Juel1)hkf7_20170501$ /
$G:(DE-Juel1)hdd17_20180501$ / $G:(DE-Juel1)hdd17_20170501$},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31296930},
UT = {WOS:000474821000014},
doi = {10.1038/s41598-019-46496-y},
url = {https://juser.fz-juelich.de/record/863891},
}