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

Version 2 2024-09-17, 02:06
Version 1 2023-05-17, 01:43
journal contribution
posted on 2023-05-17, 01:43 authored by Koh, CH, Peng, ZF, Ou, K, Melendez, A, Manikandan, J, Qi, RZ, Cheung, NS
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.

History

Publication title

Journal of Cellular Physiology

Volume

211

Pagination

63-87

ISSN

0021-9541

Department/School

Menzies Institute for Medical Research

Publisher

Wiley-Liss

Place of publication

Div John Wiley & Sons Inc, 605 Third Ave, New York, USA, Ny, 10158-0012

Repository Status

  • Restricted

Socio-economic Objectives

Clinical health not elsewhere classified

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