Article (Scientific journals)
Transcriptome analysis reveals link between proteasomal and mitochondrial pathways in Parkinson's disease.
Duke, D. C.; Moran, L. B.; Kalaitzakis, M. E. et al.
2006In Neurogenetics, 7 (3), p. 139-48
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Keywords :
Brain/metabolism; Case-Control Studies; Cluster Analysis; Down-Regulation; Gene Expression Profiling; Mitochondria/metabolism; Oligonucleotide Array Sequence Analysis; Parkinson Disease/metabolism; Proteasome Endopeptidase Complex/metabolism; Substantia Nigra/metabolism; Ubiquitin/metabolism; Up-Regulation
Abstract :
[en] There is growing evidence that dysfunction of the mitochondrial respiratory chain and failure of the cellular protein degradation machinery, specifically the ubiquitin-proteasome system, play an important role in the pathogenesis of Parkinson's disease. We now show that the corresponding pathways of these two systems are linked at the transcriptomic level in Parkinsonian substantia nigra. We examined gene expression in medial and lateral substantia nigra (SN) as well as in frontal cortex using whole genome DNA oligonucleotide microarrays. In this study, we use a hypothesis-driven approach in analysing microarray data to describe the expression of mitochondrial and ubiquitin-proteasomal system (UPS) genes in Parkinson's disease (PD). Although a number of genes showed up-regulation, we found an overall decrease in expression affecting the majority of mitochondrial and UPS sequences. The down-regulated genes include genes that encode subunits of complex I and the Parkinson's-disease-linked UCHL1. The observed changes in expression were very similar for both medial and lateral SN and also affected the PD cerebral cortex. As revealed by "gene shaving" clustering analysis, there was a very significant correlation between the transcriptomic profiles of both systems including in control brains. Therefore, the mitochondria and the proteasome form a higher-order gene regulatory network that is severely perturbed in Parkinson's disease. Our quantitative results also suggest that Parkinson's disease is a disease of more than one cell class, i.e. that it goes beyond the catecholaminergic neuron and involves glia as well.
Disciplines :
Neurology
Author, co-author :
Duke, D. C.;  Imperial College London > Department of Neuropathology
Moran, L. B.;  Imperial College London > Department of Neuropathology
Kalaitzakis, M. E.;  Imperial College London > Department of Neuropathology
Deprez, Manuel ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques
Dexter, D. T.;  Imperial College London > Department of Cellular and Molecular Neuroscience
Pearce, R. K. B.;  Imperial College London > Department of Neuropathology
Graeber, M. B.;  Imperial College London > Department of Neuropathology
Language :
English
Title :
Transcriptome analysis reveals link between proteasomal and mitochondrial pathways in Parkinson's disease.
Publication date :
2006
Journal title :
Neurogenetics
ISSN :
1364-6745
eISSN :
1364-6753
Publisher :
Springer Verlag, New York, United States - New York
Volume :
7
Issue :
3
Pages :
139-48
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
UK Parkinson’s Disease Society Tissue Bank at Imperial College
Available on ORBi :
since 11 June 2010

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