Search: onr:"swepub:oai:lup.lub.lu.se:042bbe20-4aad-487c-ad35-0bd2bcab5304" >
Role of striatal l-...
Role of striatal l-DOPA in the production of dyskinesia in 6-hydroxydopamine lesioned rats.
-
- Carta, Manolo (author)
- Lund University,Lunds universitet,Basala gangliernas patofysiologi,Forskargrupper vid Lunds universitet,Basal Ganglia Pathophysiology,Lund University Research Groups
-
- Lindgren, Hanna (author)
- Lund University,Lunds universitet,Basala gangliernas patofysiologi,Forskargrupper vid Lunds universitet,Basal Ganglia Pathophysiology,Lund University Research Groups
-
- Lundblad, Martin (author)
- Lund University,Lunds universitet,Basala gangliernas patofysiologi,Forskargrupper vid Lunds universitet,Basal Ganglia Pathophysiology,Lund University Research Groups
-
show more...
-
Stancampiano, Roberto (author)
-
Fadda, Fabio (author)
-
- Cenci Nilsson, Angela (author)
- Lund University,Lunds universitet,Basala gangliernas patofysiologi,Forskargrupper vid Lunds universitet,Basal Ganglia Pathophysiology,Lund University Research Groups
-
show less...
-
(creator_code:org_t)
- Wiley, 2006
- 2006
- English.
-
In: Journal of Neurochemistry. - : Wiley. - 1471-4159 .- 0022-3042. ; 96:6, s. 1718-1727
- Related links:
-
http://www.ncbi.nlm....
-
show more...
-
http://dx.doi.org/10...
-
https://onlinelibrar...
-
https://lup.lub.lu.s...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- We explored possible differences in the peripheral and central pharmacokinetics of L-DOPA as a basis for individual variation in the liability to dyskinesia. Unilaterally, 6-hydroxydopamine (6-OHDA) lesioned rats were treated chronically with L-DOPA for an induction and monitoring of abnormal involuntary movements (AIMs). Comparisons between dyskinetic and non-dyskinetic cases were then carried out with regard to plasma and striatal L-DOPA concentrations, tissue levels of dopamine (DA), DA metabolites, and serotonin. After a single intraperitoneal injection of L-DOPA, plasma L-DOPA concentrations did not differ between dyskinetic and non-dyskinetic animals, whereas peak levels of L-DOPA in the striatal extracellular fluid were about fivefold larger in the former compared with the latter group. Interestingly, the time course of the AIMs paralleled the surge in striatal L-DOPA levels. Intrastriatal infusion of L-DOPA by reverse dialysis concentration dependently induced AIMs in all 6-OHDA lesioned rats, regardless of a previous priming for dyskinesia. Steady-state levels of DA and its metabolites in striatal and cortical tissue did not differ between dyskinetic and non-dyskinetic animals, indicating that the observed difference in motor response to L-DOPA did not depend on the extent of lesion-induced DA depletion. These results show that an elevation of L-DOPA levels in the striatal extracellular fluid is necessary and sufficient for the occurrence of dyskinesia. Individual differences in the central bioavailability of L-DOPA may provide a clue to the varying susceptibility to dyskinesia in Parkinson's disease.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database