Source comparison
TB-500 Research Performance Metrics: Protocol Comparison
Wound Closure Velocity Planimetry with edge-tracking software (linear rate, mm/day) Daily through day 7, then every 48h 0.50–0.58 mm/day 0.28–0.35 mm/day Linear velocity eliminates contraction artifacts that inflate area-based measurements. The only metric tha
This comparison does not assign a generated winner or score.
- Wound Closure Velocity
- Planimetry with edge-tracking software (linear rate, mm/day)
- Daily through day 7, then every 48h
- 0.50–0.58 mm/day
- 0.28–0.35 mm/day
- Linear velocity eliminates contraction artifacts that inflate area-based measurements. The only metric that isolates keratinocyte migration
- Collagen Type I:III Ratio
- Picrosirius red staining under polarized light, ImageJ quantification
- Day 21 and day 42
- 1.8:1 (d21), 3.2:1 (d42)
- 1.2:1 (d21), 2.5:1 (d42)
- Type ratio is the single best predictor of functional tensile strength recovery. Total collagen content without this ratio is clinically meaningless
- Capillary Density
- CD31 immunohistochemistry, vessel count per HPF at 400×
- Day 10 (peak angiogenesis)
- 60–75 vessels per HPF
- 45–55 vessels per HPF
- Vascular density correlates directly with tissue oxygenation and collagen synthesis rates. Measuring VEGF expression alone without capillary counts is insufficient
- Inflammatory Cytokine Panel
- ELISA for IL-6, TNF-α, IL-10 from tissue homogenates
- Days 3, 7, 14
- IL-6 peak day 3 then 60% reduction by day 7
- IL-6 sustained elevation through day 10
- TB-500 accelerates inflammatory resolution without suppressing initial immune response. Prolonged IL-6 elevation beyond day 7 indicates dysregulated healing
- Tensile Strength Recovery
- Tensiometry with stress-strain analysis (Newtons at failure)
- Day 28 and day 56
- 65–75% of native tissue (d28), 85–92% (d56)
- 40–50% (d28), 68–78% (d56)
- Biomechanical testing is the functional validation endpoint. Histological improvements that don't translate to tensile strength indicate incomplete remodeling
- Keratinocyte Proliferation
- Ki-67 immunostaining, positive cell count per HPF in basal layer
- Days 5, 7, 10
- 45–60 Ki-67+ cells per HPF (day 5 peak)
- 28–38 Ki-67+ cells per HPF
- Proliferation index must correlate with closure velocity. Discordance between these metrics suggests measurement error or confounding contraction