Total antioxidant capacity in Eales' disease, uveitis & cataract

Area of Science:

• Ophthalmology
• Biochemistry
• Oxidative Stress Research

Background:

• The human body employs a complex system of antioxidants to neutralize harmful oxidants.
• Oxidative stress is implicated in various ocular pathologies, including Eales' disease, uveitis, and cataract.
• Assessing overall antioxidant capacity can provide insights into disease pathogenesis and progression.

Purpose of the Study:

• To evaluate serum total antioxidant capacity (TAC) as a single marker in Eales' disease (ED).
• To compare TAC levels in ED, uveitis (acute inflammation), and cataract (chronic condition) against healthy controls.
• To correlate TAC with markers of oxidative stress and individual antioxidant levels.

Main Methods:

• Serum TAC was measured spectrophotometrically in patients with Eales' disease (n=20), uveitis (n=20), and cataract (n=20).
• Oxidative stress was assessed using TBARS assay.
• Levels of individual antioxidants (Vitamin C, E, Glutathione) were estimated and correlated with TAC.

Main Results:

• Significantly lower TAC levels were observed in active Eales' disease, healed Eales' disease, uveitis, and cataract compared to healthy controls.
• TAC positively correlated with Vitamin E and Glutathione (GSH) levels in Eales' disease cases.
• Supplementation with Vitamins E and C led to a significant increase in TAC in Eales' disease patients.

Conclusions:

• Serum TAC is a valuable indicator of the overall antioxidant status in ocular diseases.
• TAC measurement serves as a comprehensive assay for linking antioxidant capacity to disease risk and monitoring therapy.
• TAC assay is a suitable alternative to individual antioxidant assays for assessing oxidative stress.