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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...

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Related Experiment Video

Updated: Aug 1, 2025

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma

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Digenic Inheritance in Juvenile Open-Angle Glaucoma.

Bindu I Somarajan¹, Shikha Gupta¹, Karthikeyan Mahalingam¹

¹Department of Ophthalmology, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.

Journal of Pediatric Genetics

|April 24, 2023

Summary

This summary is machine-generated.

Juvenile open-angle glaucoma (JOAG) is rare, affecting individuals under 40. This study found that mutations in MYOC and LTBP2 genes together cause severe JOAG in a Northern Indian family, suggesting digenic inheritance.

Keywords:

digenic glaucoma inheritance mutation phenotype

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Area of Science:

Ophthalmology
Genetics
Molecular Biology

Background:

Juvenile open-angle glaucoma (JOAG) is a rare form of primary glaucoma with onset before age 40.
Understanding the genetic basis of JOAG is crucial for diagnosis and potential therapeutic targets.

Observation:

A family from Northern India with autosomal dominant JOAG was studied.
Whole exome and Sanger sequencing were performed on affected individuals and their parents.

Findings:

The study identified cosegregation of MYOC (p.Pro370Leu) and LTBP2 (p.Pro432Leu) mutations in affected family members.
These mutations were found to be present together in individuals with severe JOAG phenotypes.

Implications:

This case report suggests a digenic inheritance pattern for MYOC and LTBP2 in JOAG.
Identifying digenic inheritance could refine genetic counseling and inform future research into glaucoma pathogenesis.