Effect of chronic treatment with angiotensin type 1 receptor antagonists on striatal dopamine levels in normal rats and in a rat model of Parkinson's disease treated with l -DOPA
Neuropharmacology, ISSN: 0028-3908, Vol: 76, Issue: PART A, Page: 156-168
2014
- 44Citations
- 40Captures
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Metrics Details
- Citations44
- Citation Indexes44
- 44
- CrossRef33
- Captures40
- Readers40
- 40
Article Description
Beneficial effects of angiotensin type-1 receptor (AT1) inhibition have been observed in a number of brain processes mediated by oxidative stress and neuroinflammation, including Parkinson's disease. However, important counterregulatory interactions between dopamine and angiotensin systems have recently been demonstrated in several peripheral tissues, and it is possible that a decrease in dopamine levels due to AT1 inhibition may interfere with neuroprotective strategies. The present experiments involving rats with normal dopaminergic innervation indicate that chronic treatment with the AT1 antagonist candesartan does not significantly affect striatal levels of dopamine, serotonin or metabolites, as does not significantly affect motor behavior, as evaluated by the rotarod test. Interestingly, chronic administration of candesartan to normal rats induced a marked increase in dopamine D1 and a decrease in dopamine D2 receptor expression. In a rat model of Parkinson's disease treated with l -DOPA, no differences in striatal dopamine and serotonin levels were observed between candesartan-treated rats and untreated, which suggests that chronic treatment with candesartan does not significantly affect the process of l -DOPA decarboxylation and dopamine release in Parkinson's disease patients. Candesartan did not induce any differences in the striatal expression of dopamine D1 and D2 and serotonin 5-HT1B receptors in 6ydroxydopamine-lesioned rats treated with l -DOPA. The results suggest that chronic treatment with AT1 antagonists as a neuroprotective strategy does not significantly affect striatal dopamine release or motor behavior. This article is part of the Special Issue entitled ‘The Synaptic Basis of Neurodegenerative Disorders’.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S002839081300333X; http://dx.doi.org/10.1016/j.neuropharm.2013.07.016; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84886516759&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/23973568; https://linkinghub.elsevier.com/retrieve/pii/S002839081300333X; https://dx.doi.org/10.1016/j.neuropharm.2013.07.016
Elsevier BV
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