Alzheimer's disease (AD) is often accompanied by extrapyramidal signs attributed to nigrostriatal dysfunction. The association between amyloid deposition and nigrostriatal degeneration is essentially unknown. We showed previously that the striatum and the substantia nigra of transgenic mice harboring familial AD (FAD)-linked APPswe/PS1ΔE9 mutants exhibit morphological alterations accompanied by amyloid-β (Aβ) deposition (Perez et al., 2004). In the present study, we further investigated the interaction between Aβ deposition and dopaminergic nigrostriatal dysfunction, by correlating morphological and biochemical changes in the nigrostriatal pathway with amyloid deposition pathology in the brains of 3- to 17-month-old APPswe/PS1ΔE9 transgenic mice and age-matched wild-type controls. We show that Aβ deposition is pronounced in the striatum of APPswe/PS1ΔE9 mice at 6 months of age, and the extent of deposition increases in an age-dependent manner. Tyrosine hydroxylase (TH)-positive dystrophic neurites with rosette or grape-like cluster disposition are observed adjacent to Aβ plaques and display multilaminar, multivesicular, and dense-core bodies as well as mitochondria. In addition, an age-dependent increase of TH protein levels are shown in nigral cells in these mutant mice. Using HPLC analysis, we found a reduction in the dopamine metabolite DOPAC in the striatum of these mice. These findings show a close association between amyloid deposition and nigrostriatal pathology and suggest that altered FAD-linked amyloid metabolism impairs, at least in part, the function of dopaminergic neurons. Copyright © 2005 Society for Neuroscience.

Perez, S., Lazarov, O., Koprich, J., Chen, E., RODRIGUEZ MENENDEZ, V., Lipton, J., et al. (2005). Nigrostriatal dysfunction in familial Alzheimer's disease-linked APPswe/PS1ΔE9 transgenic mice. THE JOURNAL OF NEUROSCIENCE, 25(44), 10220-10229 [10.1523/JNEUROSCI.2773-05.2005].

Nigrostriatal dysfunction in familial Alzheimer's disease-linked APPswe/PS1ΔE9 transgenic mice

RODRIGUEZ MENENDEZ, VIRGINIA;
2005

Abstract

Alzheimer's disease (AD) is often accompanied by extrapyramidal signs attributed to nigrostriatal dysfunction. The association between amyloid deposition and nigrostriatal degeneration is essentially unknown. We showed previously that the striatum and the substantia nigra of transgenic mice harboring familial AD (FAD)-linked APPswe/PS1ΔE9 mutants exhibit morphological alterations accompanied by amyloid-β (Aβ) deposition (Perez et al., 2004). In the present study, we further investigated the interaction between Aβ deposition and dopaminergic nigrostriatal dysfunction, by correlating morphological and biochemical changes in the nigrostriatal pathway with amyloid deposition pathology in the brains of 3- to 17-month-old APPswe/PS1ΔE9 transgenic mice and age-matched wild-type controls. We show that Aβ deposition is pronounced in the striatum of APPswe/PS1ΔE9 mice at 6 months of age, and the extent of deposition increases in an age-dependent manner. Tyrosine hydroxylase (TH)-positive dystrophic neurites with rosette or grape-like cluster disposition are observed adjacent to Aβ plaques and display multilaminar, multivesicular, and dense-core bodies as well as mitochondria. In addition, an age-dependent increase of TH protein levels are shown in nigral cells in these mutant mice. Using HPLC analysis, we found a reduction in the dopamine metabolite DOPAC in the striatum of these mice. These findings show a close association between amyloid deposition and nigrostriatal pathology and suggest that altered FAD-linked amyloid metabolism impairs, at least in part, the function of dopaminergic neurons. Copyright © 2005 Society for Neuroscience.
Articolo in rivista - Articolo scientifico
Alzheimer’s disease; amyloid; nigrostriatal; transgenics; dopamine; parkinsonism
English
2005
25
44
10220
10229
none
Perez, S., Lazarov, O., Koprich, J., Chen, E., RODRIGUEZ MENENDEZ, V., Lipton, J., et al. (2005). Nigrostriatal dysfunction in familial Alzheimer's disease-linked APPswe/PS1ΔE9 transgenic mice. THE JOURNAL OF NEUROSCIENCE, 25(44), 10220-10229 [10.1523/JNEUROSCI.2773-05.2005].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/9203
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