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TB-4 Corneal Healing Results Timeline Expect: Comparison
Epithelial Migration 14–21 days (full closure) 7–14 days (full closure) Upregulates actin polymerization; increases lamellipodia formation by 50–60% Defect area reduction: 20–30% smaller at day 7 vs controls Faster symptom relief; reduced infection risk during
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- Epithelial Migration
- 14–21 days (full closure)
- 7–14 days (full closure)
- Upregulates actin polymerization; increases lamellipodia formation by 50–60%
- Defect area reduction: 20–30% smaller at day 7 vs controls
- Faster symptom relief; reduced infection risk during open wound phase
- Basement Membrane Restoration
- 3–4 weeks (hemidesmosome formation)
- 2–3 weeks (hemidesmosome formation)
- Promotes integrin expression; enhances cell-matrix adhesion
- Hemidesmosome density: 1.8–2.2× higher at 4 weeks
- Lower recurrent erosion rates (15–20% vs 35–40% in controls)
- Stromal Remodeling
- 8–16 weeks (collagen reorganization)
- 8–12 weeks (collagen reorganization)
- Modulates MMP activity; balances collagen synthesis and degradation
- Stromal opacity: grade 0–1+ in superficial defects; grade 2–3+ in deep ulcers
- Improved corneal clarity in non-penetrating injuries; variable results in deep stromal defects
- Inflammatory Response
- Peak IL-1β/TNF-α at 48–72 hours
- Reduced IL-1β/TNF-α; maintained TGF-β signaling
- Downregulates pro-inflammatory cytokines without suppressing growth factor production
- Inflammatory cell infiltration: 30–40% reduction at day 3
- Less discomfort; reduced risk of sterile infiltrates
- Angiogenesis (in ischemic injuries)
- Minimal neovascularization; delayed healing
- Enhanced VEGF expression; controlled vessel ingrowth
- Upregulates vascular endothelial growth factor in hypoxic tissue
- Vessel density: 2–3× increase in limbal zone at 2 weeks
- Supports healing in peripheral ulcers where blood supply is limited