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Leukemia Inhibitory Factor Protects against Degeneration of Cone Photoreceptors Caused by RPE65 Deficiency
Shuqian Dong1, Fangyuan Zhen1, Tongdan Zou2
1Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Henan Provincial Ophthalmic Hospital, Zhengzhou, Henan 450000, China.
Current Medicinal Chemistry
|November 3, 2023
Summary
Leukemia inhibitory factor (LIF) protects cone cells in a mouse model of Leber congenital amaurosis (LCA). LIF activates STAT3 signaling and autophagy, offering a potential adjunctive therapy to gene therapy for RPE65-associated retinal disorders.
Area of Science:
- Ophthalmology
- Molecular Biology
- Genetics
Background:
- Leber congenital amaurosis (LCA) is an inherited retinal disorder caused by mutations in the RPE65 gene.
- RPE65 is crucial for regenerating 11-cis-retinal in the visual cycle.
- RPE65 mutations lead to early-onset retinal degeneration, with cones being particularly vulnerable.
Purpose of the Study:
- To investigate the protective effects of leukemia inhibitory factor (LIF) on cone cells in rd12 mice, a model for RPE65-associated LCA.
- To elucidate the molecular mechanisms underlying LIF's protective action.
Main Methods:
- Intravitreal microinjection of LIF into rd12 mice.
- TUNEL assay to assess retinal cell apoptosis.
- Immunostaining to evaluate cone cell degeneration.
- Immunoblotting to determine LIF-regulated signaling pathways.
Main Results:
- LIF administration activated the STAT3 signaling pathway in rd12 mice.
- LIF inhibited photoreceptor apoptosis and preserved cone cells.
- STAT3 signaling and autophagy were identified as key mediators of LIF's protective effects, as blocking STAT3 abolished the benefits.
Conclusions:
- Leukemia inhibitory factor (LIF) demonstrates potent cone-protective capabilities in the rd12 mouse model.
- LIF holds promise as an adjunct to gene therapy for RPE65-associated LCA, potentially improving therapeutic outcomes.
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