Summary
This study demonstrates that the ER chaperone p58IPK protects retinal ganglion cells (RGCs) from ocular hypertension-induced damage through its expression in retinal neurons rather than immune cells, with AAV-mediated overexpression significantly improving RGC survival. These findings suggest a neuronal-targeted therapeutic approach for glaucoma and other neurodegenerative retinal diseases, with implications for understanding how retinal stress responses affect visual function.
Key Findings
- AAV-mediated overexpression of p58IPK significantly improved RGC survival after ocular hypertension (OHT) in wild-type mice.
- Conditional knockout of p58IPK in retinal neurons (Chx10-p58IPK cKO) significantly reduced the b-wave of light-adapted electroretinogram (ERG), indicating impaired cone-mediated retinal function.
- Deletion of p58IPK in retinal neurons exacerbated RGC loss at 14 days after OHT, confirming its neuroprotective role.
- Deletion of p58IPK in myeloid cells increased microglia/macrophage activation but had no significant effect on RGC survival after OHT, dissociating neuroinflammation from neurodegeneration in this model.
Categories
Eye Health & Vision: Investigates neuroprotective mechanisms for retinal ganglion cells in ocular hypertension, directly relevant to glaucoma and retinal health.
The Science of Light: Uses electroretinogram (ERG) measurements to assess retinal function, providing insights into photoreceptor and retinal neuron biology.
Author(s)
T McLaughlin, J Wang, L Jia, F Wu, Y Wang, JJ Wang
Publication Year
2023
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