Comparative proteomics in neurodegenerative and non-neurodegenerative diseases suggest nodal point proteins in regulatory networking.

Abstract

Neurodegenerative disorders (ND) encompass clinically and genetically heterogeneous diseases with considerable overlap of their clinical, neuropathological and molecular phenotype. Various causes of neurodegeneration in disease may affect eventually the same proteins within protein networks. To identify common changes in ND, we compared brain protein changes detected by 2-D electrophoresis in four mouse models for ND: (i) Parkinson's disease, (ii) Huntington's disease, (iii) prion disease Scrapie, and (iv) a model for impaired synaptic transmission. To determine specificity of these changes for ND, we extended the scope of our investigation to three neurological conditions that do not result in neurodegeneration (non-ND). We detected 12 to 216 consistent qualitative or quantitative protein changes in individual ND and non-ND models when compared to controls. Up to 36% of these proteins were found to be altered in multiple disease states (at least three) and were therefore termed nodal point proteins. Alterations in alpha B-Crystallin and splicing factor 3b (subunit 4) occurred in at least three ND but not in non-ND. In contrast, alterations in peroxiredoxin 1 and 3, astrocytic phosphoprotein PEA15, complexin 2 and aminoacylase 1 were common to both ND and non-ND. Finally, we investigated the expression pattern of the nodal point proteins in three inbred mouse strains and found different protein abundance (expression polymorphisms) in all cases. Nodal point proteins showing expression polymorphisms may be candidate proteins for disease associated modifiers.

• Authors: Claus Zabel, Dijana Sagi, Angela M Kaindl, Nicole Steireif, Yvonne Kläre, Lei Mao, Hartmut Peters, Maik A Wacker, Ralf Kleene, Joachim Klose
• Journal: Journal of proteome research (J Proteome Res) Vol. 5 Issue 8 Pg. 1948-58 (Aug 2006) ISSN: 1535-3893 [Print] United States
• PMID: 16889417 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Nerve Tissue Proteins

Topics

• Animals
• Brain Chemistry
• Brain Diseases (genetics, metabolism)
• Electrophoresis, Gel, Two-Dimensional
• Mice
• Mice, Inbred C57BL
• Mice, Inbred Strains
• Mice, Transgenic
• Molecular Sequence Data
• Nerve Tissue Proteins (analysis, genetics)
• Neurodegenerative Diseases (genetics, metabolism)
• Polymorphism, Genetic
• Proteomics