{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T03:02:43Z","timestamp":1793156563830,"version":"4.5.0"},"reference-count":61,"publisher":"Canadian Science Publishing","issue":"1","license":[{"start":{"date-parts":[[2021,1,1]],"date-time":"2021-01-01T00:00:00Z","timestamp":1609459200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Psychiatry Neurosci"],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p> In addition to motor disability, another characteristic feature of Parkinson disease is the early appearance of psychiatric symptoms, including apathy, depression, anxiety and cognitive deficits; treatments for these symptoms are limited by the development of adverse effects such as impulse-control disorders. In this context, we investigated the orphan G protein-coupled receptor 88 (GPR88) as a novel therapeutic target. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> We used lentiviral-mediated expression of specifically designed microRNA to knock down Gpr88 in a translational male rat model of early Parkinson disease obtained by dopamine loss in the dorsolateral striatum as a result of 6-hydroxydopamine lesions. We evaluated the impact of Gpr88 knockdown on the Parkinson disease model using behavioural, immunohistochemical and in situ hybridization studies. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> Knockdown of Gpr88 in associative territories of the dorsal striatum efficiently reduced alterations in mood, motivation and cognition through modulation of the regulator of the G-protein signalling 4 and of the truncated splice variant of the FosB transcription factor. Knockdown of Gpr88 also reduced allostatic changes in striatal activity markers that may be related to patterns observed in patients and that provide support for an \u201coverload\u201d hypothesis for the etiology of the psychiatric symptoms of Parkinson disease. <\/jats:p><\/jats:sec><jats:sec><jats:title>Limitations<\/jats:title><jats:p> Behavioural tests assessing specific cognitive and motivational parameters are needed to further characterize the effects of the lesion and of Gpr88 knockdown in early-stage and advanced Parkinson disease models, presenting more extensive dopamine loss. Additional studies focusing on the direct and indirect striatal output pathways are also required, because little is known about the signalling pathways regulated by GPR88 in different striatal cell types. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p> GPR88 may constitute a highly relevant target for the treatment of the psychiatric symptoms of Parkinson disease. <\/jats:p><\/jats:sec>","DOI":"10.1503\/jpn.190171","type":"journal-article","created":{"date-parts":[[2021,1,4]],"date-time":"2021-01-04T08:33:01Z","timestamp":1609749181000},"page":"E44-E55","source":"Crossref","is-referenced-by-count":7,"title":["G-protein coupled receptor 88 knockdown in the associative striatum reduces psychiatric symptoms in a translational male rat model of Parkinson disease"],"prefix":"10.1139","volume":"46","author":[{"given":"Benjamin","family":"Galet","sequence":"first","affiliation":[{"name":"Biotechnology and Biotherapy team, ICM Brain and Spine Institute, Sorbonne 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