CLEC3B is a novel causative gene for macular-retinal dystrophy
Rong Zhou1, Go Mawatari2, Xue-Bi Cai1
1Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.
Summary
Researchers identified a new form of macular-retinal dystrophy linked to the CLEC3B gene in five families. This discovery offers new insights into the causes of maculoretinopathy.
Area of Science:
- Ophthalmology
- Genetics
- Molecular Biology
Background:
- Macular degeneration is a primary cause of global blindness.
- Understanding the genetic basis of macular dystrophies is crucial for developing targeted therapies.
Purpose of the Study:
- To define a novel subtype of macular-retinal dystrophy.
- To identify the genetic predisposition in five affected families.
Main Methods:
- Exome sequencing was employed to identify disease-causing genes in patients with inherited macular disorders.
- Functional validation involved adeno-associated virus-mediated delivery of the mutant gene into murine retinas.
- In vivo structural and functional tests were conducted to assess pathological effects.
Main Results:
- A pathogenic variant in the CLEC3B gene, encoding tetranectin, was identified in five families with autosomal dominant maculoretinopathy.
- Murine models with the CLEC3B variant exhibited subretinal deposits, reduced retinal thickness, and diminished electroretinographic responses.
- Optokinetic tracking revealed significantly impaired visual function in affected mice.
Conclusions:
- A new subtype of macular-retinal dystrophy and its associated gene, CLEC3B, have been identified.
- This research provides novel insights into the etiology of maculoretinopathy.
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