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Role of Glutamate Receptor-Related Genes in Myopia Occurrence and Visual Development
Ruting Wang1,2,3, Di Tao1,2,3, Jiuyi Lu1,2,3
1National Clinical Research Center for Ocular Disease, Eye Hospital, Wenzhou Medical University, Wenzhou, China.
Current Eye Research
|March 10, 2026
Summary
Specific glutamate receptor genes, including gria4a, gria4b, and grm5a, are implicated in myopia development and eye growth regulation. Further research is needed to understand their role in myopia onset and progression.
Area of Science:
- Ophthalmology
- Neuroscience
- Genetics
Background:
- Abnormal glutamate receptor expression is linked to myopia.
- The specific genes involved in myopia pathogenesis remain unclear.
Purpose of the Study:
- Investigate the role of glutamate receptor-related genes in zebrafish ocular development.
- Identify specific genes contributing to myopia.
Main Methods:
- Utilized CRISPR/Cas9 genome editing and morpholino oligonucleotides to delete key glutamate receptor genes (grik1, gria4a, gria4b, grm5a, grm5b).
- Assessed ocular parameters, visual responses, and cellular changes using quantitative PCR, immunofluorescence, and histological staining.
Main Results:
- Silencing gria4a, gria4b, and grm5a resulted in smaller eyes with an increased axial length to equatorial axis ratio, suggesting myopia development.
- Observed reduced choroidal vascularization, decreased eye movement frequency, and diminished visual responses (ON/OFF).
- Deletion of these genes led to reduced fluorescence in retinal cells, including bipolar and amacrine cells, and retinal pigment epithelium (RPE) cells.
Conclusions:
- Glutamate receptor genes, particularly gria4a, gria4b, and grm5a, play a significant role in regulating eye growth and visual development.
- These findings highlight the potential involvement of glutamate receptors in the etiology of myopia.
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