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Updated: Jul 24, 2026

Monitoring Activation of the Antiviral Pattern Recognition Receptors RIG-I And PKR By Limited Protease Digestion and Native PAGE

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Opposing activities protect against age-onset proteotoxicity.

Ehud Cohen¹, Jan Bieschke, Rhonda M Perciavalle

¹Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.

Science (New York, N.Y.)

|August 12, 2006

Summary

Slowing aging by decreasing insulin/insulin growth factor-1-like signaling (IIS) reduced Abeta(1-42) peptide aggregation toxicity. Transcription factors HSF-1 and DAF-16 modulate protein aggregation and disaggregation, linking aging to proteotoxicity.

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Area of Science:

Neuroscience
Molecular Biology
Genetics

Background:

Aberrant protein aggregation, like Abeta(1-42) misassembly, is characteristic of neurodegenerative diseases such as Alzheimer's.
The insulin/insulin growth factor-1-like signaling (IIS) pathway regulates aging and cellular stress responses across species.

Purpose of the Study:

To investigate the mechanistic link between aging and protein aggregation-mediated toxicity.
To explore the role of the IIS pathway in modulating Abeta(1-42) aggregation and toxicity.

Main Methods:

Utilized Caenorhabditis elegans as a model organism.
Manipulated the insulin/insulin growth factor-1-like signaling (IIS) pathway to slow aging.
Assessed the impact on Abeta(1-42) peptide aggregation and toxicity.
Investigated the roles of downstream transcription factors, heat shock factor 1 (HSF-1) and DAF-16.

Main Results:

Decreased IIS, leading to slowed aging, significantly reduced Abeta(1-42) aggregation toxicity in C. elegans.
The transcription factors HSF-1 and DAF-16 were identified as key regulators of opposing disaggregation and aggregation activities.
These factors promote cellular survival in the context of persistent toxic protein aggregation.

Conclusions:

The IIS pathway provides a mechanistic link between the aging process and proteotoxicity mediated by protein aggregation.
Modulating aging through IIS can mitigate the harmful effects of protein misassembly, offering potential therapeutic insights for neurodegenerative diseases.