Related Experiment Video
Updated: Dec 29, 2025
09:59
Quantitative Analysis of Autophagy using Advanced 3D Fluorescence Microscopy
Published on: May 3, 2013
18.3K
Monitoring spatiotemporal changes in chaperone-mediated autophagy in vivo
S Dong1,2, C Aguirre-Hernandez1,2,3,4, A Scrivo1,2
1Department of Development and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
Nature Communications
|February 2, 2020
Summary
Researchers developed a new reporter mouse to measure chaperone-mediated autophagy (CMA) activity in vivo. This tool reveals tissue-specific CMA differences and responses to stress and drugs across multiple organs.
Area of Science:
- Cellular Biology
- Molecular Biology
- Physiology
Background:
- Autophagy is crucial in human diseases, but its tissue-specific regulation is poorly understood due to limited in vivo monitoring methods.
- Chaperone-mediated autophagy (CMA), a selective autophagy pathway, has primarily been studied in vitro, lacking single-cell resolution in a tissue context.
- Developing tools to visualize and quantify CMA activity in live tissues is essential for understanding its physiological and pathological roles.
Purpose of the Study:
- To develop a novel transgenic reporter mouse model for dynamic, in vivo measurement of chaperone-mediated autophagy (CMA) activity.
- To investigate tissue-specific and temporal differences in CMA activity under basal and stress conditions.
- To demonstrate the utility of the reporter mouse for studying CMA in various biological contexts, including drug responses.
Main Methods:
- Creation of a transgenic reporter mouse allowing image-based, dynamic measurement of CMA activity.
- In vivo imaging and analysis of CMA activity in multiple organs of the reporter mice.
- Application of the model in organotypic and cell cultures derived from the reporter mice.
- Monitoring multiorgan responses to pharmacological agents that modulate CMA.
Main Results:
- Identification of previously unrecognized spatial and temporal variations in CMA activity across different organs.
- Demonstration of dynamic CMA responses to various physiological and pharmacological stresses.
- Successful application of the reporter system in live animals, organotypic cultures, and cell cultures for CMA monitoring.
- Practical examples showcasing multiorgan CMA modulation by specific drugs.
Conclusions:
- The developed transgenic reporter mouse provides an unprecedented tool for real-time, in vivo monitoring of CMA activity at single-cell resolution.
- This model facilitates the discovery of novel insights into the tissue-specific regulation and dynamic behavior of CMA.
- The findings highlight the potential of targeting CMA therapeutically and underscore the importance of understanding its organ-specific functions.
