Is Cataract in Patients under 60 Years Associated with Oxidative Stress?

Area of Science:

• Ophthalmology
• Biochemistry
• Gerontology

Background:

• Oxidative stress is implicated in cataract development.
• Early-onset cataracts (under 60) may have distinct underlying mechanisms.
• Systemic antioxidant status requires further investigation in younger cataract patients.

Purpose of the Study:

• To assess systemic antioxidant status in cataract patients under 60 years old.
• To compare antioxidant enzyme activities and oxidative stress markers between cataract patients and controls.
• To investigate the relationship between oxidative stress and cataract formation in this age group.

Main Methods:

• Enzyme activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) were measured in erythrocytes.
• Plasma concentrations of vitamin A and E were quantified.
• Levels of malondialdehyde (MDA), conjugated dienes (CD), and protein carbonyls (PC) were determined as markers of oxidative damage.

Main Results:

• Cataract patients exhibited significantly lower SOD and GPx activity, and reduced plasma vitamin A and E concentrations.
• Elevated plasma and erythrocyte malondialdehyde (MDA) concentrations were observed in cataract patients.
• Higher protein carbonyls (PC) and conjugated dienes (CD) levels indicated increased lipid and protein oxidation in cataract patients.

Conclusions:

• Cataract incidence in individuals under 60 is associated with depleted antioxidant defenses and heightened lipid and protein oxidation.
• These findings suggest a significant role for oxidative stress in the pathogenesis of early-onset cataracts.
• Antioxidant supplementation could be a potentially beneficial therapeutic strategy for this patient group.