Objective:

To investigate the molecular mechanisms driving lens protein aggregation in age-related cataract, focusing on oxidative damage to γS-crystallin.

Key Findings:

• The oxidized mimic γS-W163(5HTP) showed reduced stability and increased aggregation tendency compared to wild-type γS-crystallin.
• Thermal aggregation experiments indicated that γS-W163(5HTP) formed aggregates at lower temperatures.
• Molecular simulations suggested oxidative damage induces structural changes that enhance aggregation susceptibility.

Interpretation:

The findings underscore the role of cumulative protein damage in cataract formation, highlighting specific oxidative modifications as critical factors in destabilizing lens proteins.

Limitations:

• The study is mechanistic and preclinical, requiring further research to translate findings into clinical applications.
• Oxidative damage in native lenses occurs slowly and heterogeneously, complicating the isolation of individual modification effects.

Conclusion:

This research contributes to understanding cataract pathogenesis and may inform future strategies for delaying or preventing cataract formation through targeted therapies.