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| Content Provider | Springer Nature Link |
|---|---|
| Author | Cass, Wayne A. Peters, Laura E. Fletcher, Anita M. Yurek, David M. |
| Copyright Year | 2014 |
| Abstract | Current therapies for Parkinson’s disease (PD) offer symptomatic relief but do not provide a cure or slow the disease process. Treatments that could halt progression of the disease or help restore function to damaged neurons would be of substantial benefit. Calcitriol, the active metabolite of vitamin D, has been shown to have significant effects on the brain. These effects include upregulating trophic factor levels, and reducing the severity of some central nervous system lesions. While previous studies have shown that calcitriol can be neuroprotective in 6-hydroxydopamine (6-OHDA) rodent models of PD, the present experiments were designed to examine the ability of calcitriol to promote restoration of extracellular dopamine (DA) levels and tissue content of DA in animals previously lesioned with 6-OHDA. Male Fischer-344 rats were given a single injection of 12 µg 6-OHDA into the right striatum. Four weeks later the animals were administered vehicle or calcitriol (0.3 or 1.0 µg/kg, s.c.) once a day for eight consecutive days. Three weeks after the calcitriol treatments in vivo microdialysis experiments were conducted to measure potassium and amphetamine evoked overflow of DA from both the left and right striata. In control animals treated with 6-OHDA and vehicle there were significant reductions in both potassium and amphetamine evoked overflow of DA on the lesioned side of the brain compared to the contralateral side. In animals treated with 6-OHDA followed by calcitriol there was significantly greater potassium and amphetamine evoked overflow of DA from the lesioned striatum compared to that from the control animals. The calcitriol treatments also led to increases in postmortem tissue levels of DA in the striatum and substantia nigra. These results suggest that calcitriol may help promote recovery of dopaminergic functioning in injured nigrostriatal neurons. |
| Starting Page | 1467 |
| Ending Page | 1476 |
| Page Count | 10 |
| File Format | |
| ISSN | 03643190 |
| Journal | Neurochemical Research |
| Volume Number | 39 |
| Issue Number | 8 |
| e-ISSN | 15736903 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2014-05-25 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Striatum Substantia nigra Dopamine Calcitriol 6-OHDA GDNF Neurosciences Neurochemistry Biochemistry Cell Biology Neurology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Biochemistry Cellular and Molecular Neuroscience |
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