Proteomic analysis of the hippocampus in Alzheimer's disease model mice by using two-dimensional fluorescence difference in gel electrophoresis.

Abstract

We previously identified the E693Δ mutation in amyloid precursor protein (APP) in patients with Alzheimer's disease (AD) and then generated APP-transgenic mice expressing this mutation. As these mice possessed abundant Aβ oligomers from 8 months of age but no amyloid plaques even at 24 months of age, they are a good model to study pathological effects of amyloid β (Aβ) oligomers. The two-dimensional fluorescence difference in gel electrophoresis (2D-DIGE) technology, using a mixed-sample internal standard, is now recognized as an accurate method to determine and quantify proteins. In this study, we examined the proteins for which levels were altered in the hippocampus of 12-month-old APP(E693Δ)-transgenic mice using 2D-DIGE and liquid chromatography-tandem mass spectrometry (LC-MS/MS). Fourteen proteins were significantly changed in the hippocampus of APP(E693Δ)-transgenic mice. Actin cytoplasmic 1 (β-actin), heat shock cognate 71kDa, γ-enolase, ATP synthase subunit β, tubulin β-2A chain, clathrin light chain B (clathrin) and dynamin-1 were increased. Heat shock-related 70kDa protein 2, neurofilament light polypeptide (NFL), stress-induced-phosphoprotein 2, 60kDa heat shock protein (HSP60), α-internexin, protein kinase C and casein kinase substrate in neurons protein 1 (Pacsin 1), α-enolase and β-actin were decreased. Western blotting also validated the changed levels of HSP60, NFL, clathrin and Pacsin 1 in APP(E693Δ)-transgenic mice. The identified proteins could be classified as cytoskeleton, chaperons, neurotransmission, energy supply and signal transduction. Thus, proteomics by 2D-DIGE and LC-MS/MS has provided knowledge of the levels of proteins in the early stages of AD brain.

• Authors: Masaoki Takano, Takuya Yamashita, Kazuya Nagano, Mieko Otani, Kouji Maekura, Haruhiko Kamada, Shin-Ichi Tsunoda, Yasuo Tsutsumi, Takami Tomiyama, Hiroshi Mori, Kenji Matsuura, Shogo Matsuyama
• Journal: Neuroscience letters (Neurosci Lett) Vol. 534 Pg. 85-9 (Feb 08 2013) ISSN: 1872-7972 [Electronic] Ireland
• PMID: 23276639 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

Chemical References

• Amyloid beta-Protein Precursor
• Proteome

Topics

• Alzheimer Disease (metabolism)
• Amyloid beta-Protein Precursor (genetics)
• Animals
• Chromatography, Liquid
• Fluorescence
• Hippocampus (metabolism)
• Mice
• Mice, Transgenic
• Proteome (metabolism)
• Tandem Mass Spectrometry
• Two-Dimensional Difference Gel Electrophoresis