Structurally Engineered Carbonized Polycatechin for Targeting VEGF Signaling and Oxidative Stress in Corneal...

Area of Science:

• Ophthalmology
• Materials Science
• Nanomedicine

Background:

• Corneal neovascularization (CNV) involves abnormal blood vessel growth into the cornea, driven by vascular endothelial growth factor (VEGF) and oxidative stress, potentially causing blindness.
• Catechin (Ch), despite its beneficial properties, has limited therapeutic use due to poor solubility, stability, and bioactivity.

Purpose of the Study:

• To develop and evaluate carbonized-polycatechin (c-pCh) as a novel treatment for CNV.
• To assess c-pCh's efficacy in inhibiting VEGF-VEGFR-2 interaction and mitigating oxidative stress-induced angiogenesis.

Main Methods:

• Mild pyrolysis of catechin (Ch) at 210°C followed by alkaline polymerization to create carbonized-polycatechin (c-pCh).
• Evaluation of c-pCh's anti-angiogenic properties and effect on oxidative stress.
• Testing c-pCh efficacy in a rat model of suture-induced CNV, comparing it with monomeric Ch.

Main Results:

• c-pCh demonstrated superior anti-angiogenic capabilities compared to monomeric Ch in the CNV rat model.
• c-pCh effectively inhibited the VEGF-VEGFR-2 interaction and reduced oxidative stress contributing to angiogenesis.
• The carbonization and polymerization process enhanced the bioactivity and biocompatibility of catechin.

Conclusions:

• Carbonized-polycatechin (c-pCh) is a promising therapeutic agent for managing corneal neovascularization.
• The combined carbonization and polymerization strategy offers a viable approach for developing enhanced herbal nanomedicines.
• c-pCh's multifaceted action against angiogenesis and oxidative stress highlights its potential in ophthalmology.