VIRMA modulates function of photoreceptor cells through m6A modification and alternative splicing
Wenjing Liu1,2, Xiaojing Wu1, Rong Zou2
1Department of Orthopedics and.
JCI Insight
|March 20, 2026
Summary
VIRMA-mediated N6-methyladenosine (m6A) modification is crucial for retinal homeostasis and photoreceptor function. Its depletion impairs vision and causes degeneration, highlighting epigenetic targets for blinding diseases.
Area of Science:
- Epigenetics
- Molecular Biology
- Neuroscience
Background:
- N6-methyladenosine (m6A) is a prevalent mRNA modification regulating gene expression.
- VIRMA is a key component of the m6A methyltransferase complex, essential for its stability.
- m6A modification plays a vital role in nervous system development and retinal homeostasis.
Purpose of the Study:
- To investigate the role of VIRMA-mediated m6A modification in retinal homeostasis and photoreceptor function.
- To elucidate the molecular mechanisms underlying VIRMA's function in the retina.
Main Methods:
- Utilized genetic manipulation to deplete Virma in retinal rod cells.
- Assessed m6A methylation levels, photoreceptor function, and retinal histology.
- Investigated the interaction of VIRMA with splicing factors and its effect on gene splicing.
Main Results:
- Loss of Virma led to reduced m6A levels, impaired photoreceptor function, and degeneration.
- Virma depletion affected the m6A modification of visual perception-associated genes.
- Virma interacts with splicing factors to regulate alternative splicing of retina-related genes, contributing to photoreceptor damage.
- Reintroduction of Virma rescued photoreceptor degeneration.
Conclusions:
- VIRMA-mediated m6A modification is essential for maintaining photoreceptor function and retinal homeostasis.
- Dysregulation of VIRMA contributes to photoreceptor degeneration and vision impairment.
- Epigenetic modulation targeting VIRMA presents a potential therapeutic strategy for blinding diseases.
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