EP300 Protects from Light-Induced Retinopathy in Zebrafish

Area of Science:

• Ophthalmology
• Molecular Biology
• Genetics

Background:

• Bright light exposure causes photoreceptor cell damage and degeneration, leading to retinopathy.
• The precise mechanisms driving light-induced retinopathy are not fully understood.

Purpose of the Study:

• To identify key genes and pathways involved in light-induced retinopathy.
• To investigate the role of histone acetyltransferase EP300 in protecting retinal cells from light damage.

Main Methods:

• Comparative transcriptome analysis of three rodent models of light-induced retinopathy.
• Gene ontology analysis to identify dysregulated gene networks.
• Development of a larval zebrafish model to study EP300 function in light-induced retinopathy.

Main Results:

• Identified 37 dysregulated genes common to all three rodent models, significantly associated with the STAT1/3-IL6ST/OSMR cytokine signaling axis.
• EP300 was identified as a potential upstream regulator of this axis.
• Pharmacological inhibition of EP300 in zebrafish exacerbated light-induced retinal damage, increasing apoptosis and decreasing photoreceptor outer segments.

Conclusions:

• EP300 plays a protective role in photoreceptor cells against light-induced damage.
• EP300 activation presents a potential therapeutic strategy for treating retinal degenerative diseases.