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@ARTICLE{Kutzsche:1023080,
author = {Kutzsche, Janine and Guzman, Gustavo A. and Willuweit,
Antje and Kletke, Olaf and Wollert, Esther and Gering, Ian
and Jürgens, Dagmar and Breitkreutz, Jörg and Stark,
Holger and Beck-Sickinger, Annette G. and Klöcker, Nikolaj
and Hidalgo, Patricia and Willbold, Dieter},
title = {{A}n orally available {C}a v 2.2 calcium channel inhibitor
for the treatment of neuropathic pain},
journal = {British journal of pharmacology},
volume = {181},
number = {12},
issn = {0007-1188},
address = {Malden, MA},
publisher = {Wiley},
reportid = {FZJ-2024-01653},
pages = {1734-1756},
year = {2024},
abstract = {AbstractBackground and Purpose:Neuropathic pain affects up
to $10\%$ of the global popula-tion and is caused by an
injury or a disease affecting the somatosensory,
peripheral,or central nervous system. NP is characterized by
chronic, severe and opioid-resistantproperties. Therefore,
its clinical management remains very challenging. The
N-typevoltage-gated calcium channel, Cav2.2, is a validated
target for therapeutic interven-tion in chronic and
neuropathic pain. The conotoxin ziconotide (Prialt®) is an
FDA-approved drug that blocks Cav2.2 channel but needs to be
administered intrathecally.Thus, although being principally
efficient, the required application route is very muchin
disfavour.Experimental Approach and Key Results:Here, we
describe an orally available drugcandidate, RD2, which
competes with ziconotide binding to Cav2.2 at
nanomolarconcentrations and inhibits Cav2.2 almost
completely reversible. Other voltage-gatedcalcium channel
subtypes, like Cav1.2 and Cav3.2, were affected by RD2 only
at con-centrations higher than 10μM. Data from sciatic
inflammatory neuritis rat modeldemonstrated thein vivoproof
of concept, as low-dose RD2 (5 mgkg-1) administeredorally
alleviated neuropathic pain compared with vehicle controls.
High-dose RD2(50 mgkg-1) was necessary to reduce pain
sensation in acute thermal responseassessed by the tail
flick test.Conclusions and Implications:Taken together,
these results demonstrate that RD2has antiallodynic
properties. RD2 is orally available, which is the most
convenientapplication form for patients and caregivers. The
surprising and novel result fromstandard receptor screens
opens the room for further optimization into new promis-ing
drug candidates, which address an unmet medical need.},
cin = {IBI-7},
ddc = {610},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {5244 - Information Processing in Neuronal Networks
(POF4-524)},
pid = {G:(DE-HGF)POF4-5244},
typ = {PUB:(DE-HGF)16},
pubmed = {38157867},
UT = {WOS:001158587800001},
doi = {10.1111/bph.16309},
url = {https://juser.fz-juelich.de/record/1023080},
}