Dietary Supplementation of Antioxidant Compounds Prevents Light‐Induced Retinal Damage in a Rat Model

Light‐induced retinal damage (LD) is characterized by the accumulation of reactive oxy‐ gen species leading to oxidative stress and photoreceptor cell death. The use of natural antioxidants has emerged as promising approach for the prevention of LD. Among them, lutein and cyanidin‐3‐ glucoside (C3G) have been shown to be particularly effective due to their antioxidant and anti‐in‐ flammatory activity. However, less is known about the possible efficacy of combining them in a multicomponent mixture. In a rat model of LD, Western blot analysis, immunohistochemistry and electroretinography were used to demonstrate that lutein and C3G in combination or in a multi‐ component mixture can prevent oxidative stress, inflammation, gliotic and apoptotic responses thus protecting photoreceptor cells from death with higher efficacy than each component alone. Com‐ bined efficacy on dysfunctional electroretinogram was also demonstrated by ameliorated rod and cone photoreceptor responses. These findings suggest the rationale to formulate multicomponent blends which may optimize the partnering compounds bioactivity and bioavailability.