Sensitivity to MPTP is not increased in Parkinson's disease-associated mutant alpha-synuclein transgenic mice.
J Neurochem
; 77(4): 1181-4, 2001 May.
Article
em En
| MEDLINE
| ID: mdl-11359883
ABSTRACT
Environmental and genetic factors that contribute to the pathogenesis of Parkinson's disease are discussed. Mutations in the alpha-synuclein (alphaSYN ) gene are associated with rare cases of autosomal-dominant Parkinson's disease. We have analysed the dopaminergic system in transgenic mouse lines that expressed mutant [A30P]alphaSYN under the control of a neurone-specific Thy-1 or a tyrosine hydroxylase (TH) promoter. The latter mice showed somal and neuritic accumulation of transgenic [A30P]alphaSYN in TH-positive neurones in the substantia nigra. However, there was no difference in the number of TH-positive neurones in the substantia nigra and the concentrations of catecholamines in the striatum between these transgenic mice and non-transgenic littermates. To investigate whether forced expression of [A30P]alphaSYN increased the sensitivity to putative environmental factors we subjected transgenic mice to a chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) regimen. The MPTP-induced decrease in the number of TH-positive neurones in the substantia nigra and the concentrations of catecholamines in the striatum did not differ in any of the [A30P]alphaSYN transgenic mouse lines compared with wild-type controls. These results suggest that mutations and forced expression of alphaSYN are not likely to increase the susceptibility to environmental toxins in vivo.
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Base de dados:
MEDLINE
Assunto principal:
Doença de Parkinson
/
1-Metil-4-Fenil-1,2,3,6-Tetra-Hidropiridina
/
Proteínas do Tecido Nervoso
Idioma:
En
Ano de publicação:
2001
Tipo de documento:
Article