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Updated: Mar 20, 2026

Study of Protein-protein Interactions in Autophagy Research
Published on: September 9, 2017
Structure-Activity Relationship Studies Enable Optimization of a Small-Molecule Autophagy Activator and Evaluation of
Andrew Dobria1,2, Andrea Arrieche Suarez1,2, Thomas Whitmarsh-Everiss1
1Department of Chemistry, University of Illinois Chicago, Chicago, Illinois 60607, United States.
Abstract:
Autophagy is a catabolic cellular process that degrades and recycles cellular components. Dysregulation of autophagy can contribute to the development and progression of many different diseases, including cancer and neurodegenerative diseases. Our lab previously completed a high-throughput screen for autophagy activators, and initial structure-activity relationship studies revealed modifications that significantly increased the potency of the original hit. However, this compound has very poor microsomal stability, limiting its utility as an in vivo probe. To overcome this limitation, we developed synthetic strategies to facilitate iterative synthesis of additional analogues with improved potency, stability, and properties. Mechanistic studies revealed that high levels of sustained autophagy activation can lead to autophagy-dependent cell death and enabled differentiation of analogues with off-target effects and analogues with improved selectivity. The most promising analogues have been selected for additional evaluation in disease-relevant models to improve our understanding of the role of autophagy in diverse disease states.
Insights
Scientists enhanced autophagy activators for disease research. New analogues show improved stability and selectivity, enabling further study in cancer and neurodegenerative disease models.
Area of Science:
- Cellular biology
- Molecular mechanisms of disease
Background:
- Autophagy, a cellular recycling process, is implicated in diseases like cancer and neurodegeneration.
- Previous research identified initial autophagy activators but noted poor compound stability.
- Structure-activity relationship studies aimed to enhance activator potency.
Purpose of the Study:
- To develop novel autophagy activators with improved potency and microsomal stability.
- To investigate the mechanistic effects of sustained autophagy activation, including cell death.
- To differentiate analogues based on selectivity and off-target effects.
Main Methods:
- Iterative synthesis of novel analogues based on initial hit compounds.
- Mechanistic studies to assess autophagy activation levels and cellular responses.
- Evaluation of compound stability and selectivity profiles.
Main Results:
- Development of synthetic strategies yielding analogues with enhanced potency and stability.
- Identification of autophagy-dependent cell death as a consequence of sustained activation.
- Differentiation of analogues, highlighting those with improved selectivity.
Conclusions:
- Novel autophagy activators with superior properties were successfully synthesized.
- Understanding autophagy's role in disease requires selective and stable chemical probes.
- Promising analogues are poised for further in vivo evaluation in disease models.
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