Direct intranigral administration of an ubiquitin proteasome system inhibitor in rat: Behavior, positron emission tomography, immunohistochemistry
(2013) In Experimental Neurology 247. p.19-24- Abstract
- Several independent lines of research suggest that disruption of the ubiquitin proteasome system (UPS) may play a role in the pathophysiology of Parkinson's disease. Direct intracerebral injection of UPS inhibitors (e.g. lactacystin) in animals has consistently produced important features of the disease. In this study, a range of lactacystin doses (0.5, 1, 2, 10 and 20 mu g) were injected into the right substantia nigra in rats to determine the ideal dose required to produce a robust and specific lesion of the dopamine nigro-striatal system and motor deficits. Motor behavior, assessed with the tapered ledged beam task, was severely affected in animals that received high doses (10 and 20 mu g) but only mild, impairments were observed in... (More)
- Several independent lines of research suggest that disruption of the ubiquitin proteasome system (UPS) may play a role in the pathophysiology of Parkinson's disease. Direct intracerebral injection of UPS inhibitors (e.g. lactacystin) in animals has consistently produced important features of the disease. In this study, a range of lactacystin doses (0.5, 1, 2, 10 and 20 mu g) were injected into the right substantia nigra in rats to determine the ideal dose required to produce a robust and specific lesion of the dopamine nigro-striatal system and motor deficits. Motor behavior, assessed with the tapered ledged beam task, was severely affected in animals that received high doses (10 and 20 mu g) but only mild, impairments were observed in animals that received low doses (0.5, I, and 2 mu g). Positron emission tomography was performed with a dedicated small animal scanner on the rats following the injection of the radio-labeled tracer (+/-)[C-11]dihydrotetrabenazine (DTBZ) which labels vesicular monoamine transporter type 2. Severe loss of [C-11]DTBZ binding in the ipsilateral striatum was observed in the higher dose groups and mild loss was observed in the low dose groups. Stereological cell counting of tyrosine hydroxylase immunoreactive cells in the substantia nigra and the ventral tegmental area indicated a dose dependent loss of dopaminergic neurons. Significant correlations were found between the behavioral motor deficits, striatal [C-11]DTBZ binding and cell counts of tyrosine hydroxylase immunoreactive cells. Taken together these results indicate that intranigral injection of lactacystin produces dose dependent effects on the dopamine nigro-striatal system and a dose of 10 mu g will produce a consistent severe lesion. Published by Elsevier Inc. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4025665
- author
- Mackey, Scott ; Jing, Yu ; Flores, Joseph LU ; Dinelle, Katie and Doudet, Doris J.
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- keywords
- Ubiquitin proteasome system, Lactacystin, Rat, Cell counting, Positron, emission tomography, Parkinson's disease
- in
- Experimental Neurology
- volume
- 247
- pages
- 19 - 24
- publisher
- Academic Press
- external identifiers
-
- wos:000323399600004
- scopus:84876730225
- pmid:23557600
- ISSN
- 0014-4886
- DOI
- 10.1016/j.expneurol.2013.03.021
- language
- English
- LU publication?
- yes
- id
- f74adc03-327d-4a7e-9e5e-481d6c0d43e1 (old id 4025665)
- date added to LUP
- 2016-04-01 10:24:16
- date last changed
- 2025-04-03 17:32:38
@article{f74adc03-327d-4a7e-9e5e-481d6c0d43e1,
abstract = {{Several independent lines of research suggest that disruption of the ubiquitin proteasome system (UPS) may play a role in the pathophysiology of Parkinson's disease. Direct intracerebral injection of UPS inhibitors (e.g. lactacystin) in animals has consistently produced important features of the disease. In this study, a range of lactacystin doses (0.5, 1, 2, 10 and 20 mu g) were injected into the right substantia nigra in rats to determine the ideal dose required to produce a robust and specific lesion of the dopamine nigro-striatal system and motor deficits. Motor behavior, assessed with the tapered ledged beam task, was severely affected in animals that received high doses (10 and 20 mu g) but only mild, impairments were observed in animals that received low doses (0.5, I, and 2 mu g). Positron emission tomography was performed with a dedicated small animal scanner on the rats following the injection of the radio-labeled tracer (+/-)[C-11]dihydrotetrabenazine (DTBZ) which labels vesicular monoamine transporter type 2. Severe loss of [C-11]DTBZ binding in the ipsilateral striatum was observed in the higher dose groups and mild loss was observed in the low dose groups. Stereological cell counting of tyrosine hydroxylase immunoreactive cells in the substantia nigra and the ventral tegmental area indicated a dose dependent loss of dopaminergic neurons. Significant correlations were found between the behavioral motor deficits, striatal [C-11]DTBZ binding and cell counts of tyrosine hydroxylase immunoreactive cells. Taken together these results indicate that intranigral injection of lactacystin produces dose dependent effects on the dopamine nigro-striatal system and a dose of 10 mu g will produce a consistent severe lesion. Published by Elsevier Inc.}},
author = {{Mackey, Scott and Jing, Yu and Flores, Joseph and Dinelle, Katie and Doudet, Doris J.}},
issn = {{0014-4886}},
keywords = {{Ubiquitin proteasome system; Lactacystin; Rat; Cell counting; Positron; emission tomography; Parkinson's disease}},
language = {{eng}},
pages = {{19--24}},
publisher = {{Academic Press}},
series = {{Experimental Neurology}},
title = {{Direct intranigral administration of an ubiquitin proteasome system inhibitor in rat: Behavior, positron emission tomography, immunohistochemistry}},
url = {{http://dx.doi.org/10.1016/j.expneurol.2013.03.021}},
doi = {{10.1016/j.expneurol.2013.03.021}},
volume = {{247}},
year = {{2013}},
}