Proteomics Analysis of Proteotoxic Stress Response in In-Vitro Human Neuronal Models

Area of Science:

• Proteomics
• Neuroscience
• Cellular Biology

Background:

• Heat stroke causes severe central nervous system (CNS) injury, often leading to lasting brain damage.
• Heat-induced proteotoxic stress, characterized by protein aggregation, is a primary mechanism driving hyperthermic neurological damage.

Purpose of the Study:

• To comprehensively map time-series, proteome-wide changes in response to heat-induced proteotoxic stress.
• To characterize dose-dependent cellular responses in neural and non-neural cell models.

Main Methods:

• Utilized untargeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) for proteomic analysis.
• Investigated medulloblastoma (Daoy), neuroblastoma (SH-SY5Y), and differentiated neuron-like cells (SH(D)) under varying heat stress conditions.
• Performed integrated and condition-specific analyses of differentially expressed proteins (DEPs) and functional pathway analysis (IPA).

Main Results:

• Identified global proteome-wide DEPs indicative of heat-induced proteotoxic stress response.
• Observed higher DEPs and upregulated proteins under extreme heat stress, with more regulated responses in differentiated neurons.
• Functional network analysis revealed key pathways in protein/RNA metabolism, stress response, membrane trafficking, protein folding/synthesis, and nervous system development.

Conclusions:

• Provided a detailed map of the heat-induced proteotoxic stress response at the proteome level.
• Linked proteome-wide changes to specific biological processes and neurological disease pathways.
• Identified activated signaling cascades with potential neuroprotective roles, offering insights into the molecular basis of heat stroke brain injury.