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Impulsive-compulsive behaviours and striatal neuroactivity in mildly parkinsonian rats under D2/3 agonist and L-DOPA treatment

Wolfschlag, Mirjam LU ; Espa, Elena LU orcid ; Skovgård, Katrine LU ; Halje, Pär LU orcid and Cenci, Maria Angela LU orcid (2025) In npj Parkinson's Disease 11(1).
Abstract

Dopamine replacement therapy for Parkinson's disease can induce impulsive-compulsive behaviours (ICBs). Here we compare the D2/3 agonist ropinirole and L-DOPA, given alone or combined, with regard to their potential to induce ICBs in rats sustaining bilateral striatal injections of 6-hydroxydopamine. Daily treatment with ropinirole (2.5 mg/kg), L-DOPA (24.0 mg/kg), or their combination was given for six weeks while animals were examined using tests of compulsive checking and motor stereotypies not previously used in the ICB literature. Independently of L-DOPA cotreatment, ropinirole induced a stereotyped hyperactivity pattern, compulsive checking, and maladaptive choices in the rat version of the Iowa gambling task. Compared to both... (More)

Dopamine replacement therapy for Parkinson's disease can induce impulsive-compulsive behaviours (ICBs). Here we compare the D2/3 agonist ropinirole and L-DOPA, given alone or combined, with regard to their potential to induce ICBs in rats sustaining bilateral striatal injections of 6-hydroxydopamine. Daily treatment with ropinirole (2.5 mg/kg), L-DOPA (24.0 mg/kg), or their combination was given for six weeks while animals were examined using tests of compulsive checking and motor stereotypies not previously used in the ICB literature. Independently of L-DOPA cotreatment, ropinirole induced a stereotyped hyperactivity pattern, compulsive checking, and maladaptive choices in the rat version of the Iowa gambling task. Compared to both L-DOPA and vehicle, ropinirole elicited a distinct pattern of striatal neuroactivity, shifting the expression of a cellular activity marker from dorsolateral to centro-medial regions. Our results reveal quite distinct profiles of ICBs and striatal activation upon treatment with ropinirole or L-DOPA, providing clues of therapeutic relevance to Parkinson's ICBs.

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author
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publishing date
type
Contribution to journal
publication status
published
subject
in
npj Parkinson's Disease
volume
11
issue
1
article number
142
publisher
Springer Nature
external identifiers
  • scopus:105006927183
  • pmid:40442152
ISSN
2373-8057
DOI
10.1038/s41531-025-00996-z
language
English
LU publication?
yes
additional info
© 2025. The Author(s).
id
07e0a858-9f2a-491c-a893-ba81bc2442c2
date added to LUP
2025-06-30 09:19:10
date last changed
2025-10-21 13:48:58
@article{07e0a858-9f2a-491c-a893-ba81bc2442c2,
  abstract     = {{<p>Dopamine replacement therapy for Parkinson's disease can induce impulsive-compulsive behaviours (ICBs). Here we compare the D2/3 agonist ropinirole and L-DOPA, given alone or combined, with regard to their potential to induce ICBs in rats sustaining bilateral striatal injections of 6-hydroxydopamine. Daily treatment with ropinirole (2.5 mg/kg), L-DOPA (24.0 mg/kg), or their combination was given for six weeks while animals were examined using tests of compulsive checking and motor stereotypies not previously used in the ICB literature. Independently of L-DOPA cotreatment, ropinirole induced a stereotyped hyperactivity pattern, compulsive checking, and maladaptive choices in the rat version of the Iowa gambling task. Compared to both L-DOPA and vehicle, ropinirole elicited a distinct pattern of striatal neuroactivity, shifting the expression of a cellular activity marker from dorsolateral to centro-medial regions. Our results reveal quite distinct profiles of ICBs and striatal activation upon treatment with ropinirole or L-DOPA, providing clues of therapeutic relevance to Parkinson's ICBs.</p>}},
  author       = {{Wolfschlag, Mirjam and Espa, Elena and Skovgård, Katrine and Halje, Pär and Cenci, Maria Angela}},
  issn         = {{2373-8057}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{1}},
  publisher    = {{Springer Nature}},
  series       = {{npj Parkinson's Disease}},
  title        = {{Impulsive-compulsive behaviours and striatal neuroactivity in mildly parkinsonian rats under D2/3 agonist and L-DOPA treatment}},
  url          = {{http://dx.doi.org/10.1038/s41531-025-00996-z}},
  doi          = {{10.1038/s41531-025-00996-z}},
  volume       = {{11}},
  year         = {{2025}},
}