Related Experiment Video
Updated: Mar 29, 2026
12:59
Assessment of Oxidative Damage in the Primary Mouse Ocular Surface Cells/Stem Cells in Response to Ultraviolet-C UV-C Damage
Published on: February 15, 2020
6.8K
Tissue-Specific Antioxidant Capacity in Primary Open-Angle Glaucoma Patients.
Ying Liu1, Carla J Siegfried1, Hongli Wu2,3
1Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, Missouri, United States.
Investigative Ophthalmology & Visual Science
|March 27, 2026
Summary
Antioxidant levels in aqueous humor showed minor race differences, but trabecular meshwork and lens epithelium gene expression differed significantly in Black patients with glaucoma and cataract.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Cell Biology
Background:
- Primary open-angle glaucoma (POAG) and cataract are leading causes of vision loss.
- Understanding the role of antioxidants in ocular tissues is crucial for disease management.
- Previous studies have not fully elucidated race-associated differences in antioxidant capacity within specific ocular compartments.
Purpose of the Study:
- To evaluate antioxidant capacity in aqueous humor (AH), trabecular meshwork (TM), and lens epithelium (LE) in patients with POAG and cataract.
- To assess potential associations between antioxidant levels, race, and disease severity.
- To investigate race-specific gene expression patterns of key antioxidant markers in TM and LE.
Main Methods:
- Prospective cross-sectional study of surgical cohorts undergoing cataract and glaucoma surgery.
- Measurement of total reactive antioxidant potential and ascorbic acid in AH.
- Quantitative PCR (qPCR) analysis of NRF2, CAT, and SOD2 gene expression in paired TM and LE tissues.
- Statistical analysis including Welch's t tests, Mann-Whitney tests, and two-way ANOVA with Šídák correction for race and severity stratification.
Main Results:
- Aqueous humor antioxidant measures revealed limited race-associated differences after accounting for disease severity.
- In Black patients, nuclear factor erythroid 2-related factor 2 (NRF2) and catalase (CAT) gene expression was significantly lower in TM compared to LE.
- No such paired tissue differences were observed in White patients, indicating race-specific expression patterns for NRF2 and CAT in TM/LE.
Conclusions:
- Ocular tissue antioxidant profiles exhibit significant race- and compartment-specific differences, particularly in Black patients.
- These findings highlight the need for further investigation into the role of antioxidants in glaucoma pathogenesis across different racial groups.
- Validation in larger prospective cohorts is recommended to confirm these compartment-specific antioxidant signatures.
Related Concept Videos
01:27Open Angle Glaucoma: Treatment
1.1K
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
1.1K
01:25Glaucoma: Overview
1.6K
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...
1.6K