Oxidative stress in diabetic retinopathy

Area of Science:

• Ophthalmology
• Biochemistry
• Translational Medicine

Background:

• Diabetic retinopathy (DR) is a leading cause of blindness, driven by oxidative stress.
• Current biomarkers for oxidative stress in DR lack specificity and analytical robustness.
• Translating mechanistic insights into clinical applications is hindered by these limitations.

Purpose of the Study:

• To critically review oxidative stress biomarkers in diabetic retinopathy.
• To evaluate their biological specificity, analytical rigor, and compartmentalization.
• To propose a refined diagnostic approach for personalized therapies.

Main Methods:

• Comprehensive literature review of oxidative stress markers in DR.
• Analysis of analytical challenges in measuring reactive species and macromolecular damage.
• Exploration of integrative pathways involving glycoxidation, inflammation, and VEGF.
• Assessment of systemic versus intraretinal biomarker correlations.

Main Results:

• Many oxidative stress markers lack biological specificity and analytical rigor.
• Poor correlation exists between systemic biomarkers and intraretinal oxidative events in DR.
• Integrative pathways highlight a feed-forward loop of glycoxidation, inflammation, and VEGF.

Conclusions:

• A tiered
• "DR oxidative stress profile" combining systemic screening, pathway panels, and ocular imaging is proposed.
• This approach can enable precision phenotyping and enrich clinical trials.
• Personalized antioxidant strategies tailored to individual oxidative axes are the future of DR treatment.