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Neuronal apoptosis mediated by inhibition of intracellular cholesterol transport: Microarray and proteomics analyses in cultured murine cortical neurons

Citation

Koh, CH and Peng, ZF and Ou, K and Melendez, A and Manikandan, J and Qi, RZ and Cheung, NS, Neuronal apoptosis mediated by inhibition of intracellular cholesterol transport: Microarray and proteomics analyses in cultured murine cortical neurons, Journal of Cellular Physiology, 211, (1) pp. 63-87. ISSN 0021-9541 (2007) [Refereed Article]

DOI: doi:10.1002/jcp.20912

Abstract

Studies suggest that cholesterol imbalance in the brain might be related to the development of neurological disorders. UI8666A is a well-known amphiphile which inhibits intracellular cholesterol transport in treated cells. We have previously shown that UI8666A leads to apoptosis and cholesterol accumulation in primary cortical neurons, which is associated with activation of caspases and calpains, hyperphosphorylation of tau, and increased oxidative stress markers. However, the mechanisms involved in UI8666A-mediated apoptosis remain unknown. In this report, we sought to gain an insight into the molecular processes contributing to the neuronal apoptosis induced by UI8666A. The microarray approach was used in conjunction with proteomics techniques to identify specific proteins which may serve as signature biomarkers during UI8666A treatment. Eleven differentially expressed proteins were correlated at the gene expression level in a time-dependent manner. These proteins have been shown to play a role in lipid metabolism and transport, responses to cell death, protein folding and trafficking, and regulation of transcription. The identification of these differentially expressed proteins might provide a clue to decipher the intracellular biochemical changes during UI8666A-mediated neuronal apoptosis. Our results provide, for the first time, a combined microarray and proteomics analysis of neuronal apoptosis mediated by inhibition of intracellular cholesterol transport. This new insight may greatly facilitate the study of neurodegenerative diseases.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Neurosciences
Research Field:Cellular Nervous System
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Nervous System and Disorders
Author:Cheung, NS (Dr Nam Cheung)
ID Code:61626
Year Published:2007
Web of Science® Times Cited:15
Deposited By:Menzies Institute for Medical Research
Deposited On:2010-03-04
Last Modified:2010-05-04
Downloads:0

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