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06:55
Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions
Published on: June 7, 2020
The future of molecular chaperones and beyond
Rona G Giffard1, Alberto J L Macario, Everly Conway de Macario
1Stanford University School of Medicine, 300 Pasteur Drive, Grant Building S272A, Stanford, California 94305-5117, USA. rona.giffard@stanford.edu
The Journal of Clinical Investigation
|September 25, 2013
Summary
Supporting cells protect hair cells from drug damage using heat shock protein 70 (HSP70). This discovery offers a novel therapeutic strategy against ototoxicity and highlights HSP70
Area of Science:
- Oto-neuroscience
- Cellular stress response
- Molecular biology
Background:
- Ototoxicity from therapeutic drugs poses a significant clinical challenge.
- Heat shock proteins (HSPs) are increasingly recognized for their roles beyond cellular thermotolerance.
- Extracellular HSPs are implicated in nervous and immune system functions.
Purpose of the Study:
- To investigate the protective role of heat shock protein 70 (HSP70) released by supporting cells in the inner ear.
- To explore the potential of HSP70 as a therapeutic agent against drug-induced ototoxicity.
- To understand the non–cell-autonomous functions of HSPs in stress responses.
Main Methods:
- Utilized in vitro models of inner ear supporting cells and hair cells.
- Assessed the release of HSP70 from supporting cells under stress conditions.
- Quantified hair cell survival and function following exposure to ototoxic agents with and without HSP70 treatment.
Main Results:
- Supporting cells release HSP70, which confers protection to cochlear hair cells.
- HSP70 significantly reduced drug-induced hair cell death and preserved auditory function.
- Defects in chaperone proteins, including HSP70, are linked to inner ear pathologies.
Conclusions:
- Extracellular HSP70, released by supporting cells, is a key mediator of hair cell protection.
- Targeting HSP70 represents a promising therapeutic avenue for preventing and treating ototoxicity.
- This study underscores the critical role of non–cell-autonomous chaperone activity in maintaining tissue homeostasis and preventing disease.
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