GRK3 suppresses L-DOPA-induced dyskinesia in the rat model of Parkinson's disease via its RGS homology domain.
GRK3 suppresses L-DOPA-induced dyskinesia in the rat model of Parkinson's disease via its RGS homology domain.
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DOI:
10.1038/srep10920
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发表时间:
2015-06-04
影响因子:
4.6
通讯作者:
Gurevich EV
中科院分区:
文献类型:
--
作者:
Ahmed MR;Bychkov E;Li L;Gurevich VV;Gurevich EV
Degeneration of dopaminergic neurons causes Parkinson’s disease. Dopamine replacement therapy with L-DOPA is the best available treatment. However, patients develop L-DOPA-induced dyskinesia (LID). In the hemiparkinsonian rat, chronic L-DOPA increases rotations and abnormal involuntary movements modeling LID, via supersensitive dopamine receptors. Dopamine receptors are controlled by G protein-coupled receptor kinases (GRKs). Here we demonstrate that LID is attenuated by overexpression of GRK3 in the striatum, whereas knockdown of GRK3 by microRNA exacerbated it. Kinase-dead GRK3 and its separated RGS homology domain (RH) suppressed sensitization to L-DOPA, whereas GRK3 with disabled RH did not. RH alleviated LID without compromising anti-akinetic effect of L-DOPA. RH binds striatal Gq. GRK3, kinase-dead GRK3, and RH inhibited accumulation of ∆FosB, a marker of LID. RH-dead mutant was ineffective, whereas GRK3 knockdown exacerbated ∆FosB accumulation. Our findings reveal a novel mechanism of GRK3 control of the dopamine receptor signaling and the role of Gq in LID.
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影响因子:
6.1
作者:
Bezard, E;Gross, CE;Gurevich, EV
通讯作者:
Gurevich, EV
影响因子:
4.8
作者:
Dhami, GK;Anborgh, PH;Ferguson, SSG
通讯作者:
Ferguson, SSG
影响因子:
82.9
作者:
Bézard, E;Ferry, S;Sokoloff, P
通讯作者:
Sokoloff, P
影响因子:
5.3
作者:
Gerfen, CR;Miyachi, S;Brown, P
通讯作者:
Brown, P
影响因子:
4.7
作者:
Bychkov, Evgeny;Ahmed, M. Rafiuddin;Gurevich, Eugenia V.
通讯作者:
Gurevich, Eugenia V.