New insights into the cellular temporal response to proteostatic stress

Area of Science:

• Molecular Biology
• Cell Biology
• Biochemistry

Background:

• Maintaining proteostasis is crucial for cellular health and involves complex gene expression regulation.
• Proteostatic challenges, such as misfolded proteins and oxidative stress, significantly impact cellular function.
• Understanding these responses is vital for cancer research and therapeutic development.

Purpose of the Study:

• To systematically characterize the molecular landscape of cervical cancer cells under proteostatic stress.
• To identify shared and specific cellular responses to misfolded proteins and oxidative stress.
• To uncover novel regulatory pathways involved in proteome maintenance.

Main Methods:

• Quantification of temporal changes in transcriptome, translatome, proteome, and RNA-protein interactome.
• Analysis of cervical cancer cells subjected to proteostatic challenges.
• Investigation of gene expression regulation at multiple molecular layers.

Main Results:

• Identified shared and distinct molecular responses to misfolded proteins and oxidative stress.
• Revealed new aspects of the unfolded protein response, including genes that bypass translation shutdown.
• Discovered stress-dependent alternative splicing and altered protein-RNA binding in regulatory pathways.
• Observed multi-level gene expression changes occurring at different times and directions.

Conclusions:

• Cervical cancer cells exhibit complex, multi-layered responses to proteostatic challenges.
• The unfolded protein response involves intricate regulatory mechanisms impacting cellular energy production.
• This study provides a rich resource for understanding proteome maintenance and identifying potential therapeutic targets.