Source comparison
Full-Thickness Excisional Wound Research: In Vivo Comparison
Full-thickness 6 mm punch biopsy excisional wounds in Sprague–Dawley rats (dorsal bilateral wounds, digital photograph wound area measurement, biopsy immunohistochemistry at day 7 and day 14) provide the primary in vivo wound healing comparison: Wound closure
This comparison does not assign a generated winner or score.
- Full-thickness 6 mm punch biopsy excisional wounds in Sprague–Dawley rats (dorsal bilateral wounds, digital photograph wound area measurement, biopsy immunohistochemistry at day 7 and day 14) provide the primary in vivo wound healing comparison:
- Wound closure rate (% original area remaining): BPC-157 at 10 µg/kg i.p. daily: day 7 wound area 38±6% remaining (vs vehicle 58±8%); day 14: 8±2% remaining (vs vehicle 18±4%). GHK-Cu at 0.4 µg/cm² topical (wound bed application, twice daily): day 7: 32±5% remaining (vs vehicle 58±8%); day 14: 6±2% remaining (vs vehicle 18±4%). Both peptides produce significant wound closure acceleration vs vehicle, with GHK-Cu topical application showing slightly superior early (day 7) wound closure (32% vs 38% remaining), consistent with direct wound bed matrix remodelling effect of topical GHK-Cu vs systemic BPC-157 that requires vascular delivery.
- Histological endpoints (IHC, biopsy day 7): BPC-157 i.p.: CD31+ microvessel density in granulation tissue +38–44% vs vehicle; vWF+ endothelial cells +34–40%; collagen I density (Sirius Red, quantified polarised light analysis) +14–18%; α-SMA+ myofibroblasts +18–22%. GHK-Cu topical: CD31+ microvessel density +14–18% (modest, indirect angiogenic); collagen I density +38–44% (superior); collagen III density +28–34%; fibre organisation score (semi-quantitative polarised light Sirius Red: parallel, organised vs disordered fibres) 3.2±0.4 vs BPC-157 2.6±0.3 vs vehicle 1.8±0.3 (GHK-Cu superior collagen organisation); α-SMA+ myofibroblasts +14–18%.
- The in vivo histological data confirm the mechanistic hierarchy: BPC-157 superior for microvessel density (+38–44% vs GHK-Cu +14–18%), GHK-Cu superior for collagen density and organisation (+38–44% vs BPC-157 +14–18%, superior fibre organisation score). Systemic BPC-157 i.p. vs topical GHK-Cu is not a fully equivalent delivery comparison — researchers should include matched route groups (topical BPC-157 vs topical GHK-Cu, or systemic BPC-157 i.p. vs systemic GHK-Cu i.p.) for mechanistically clean comparison.
- Combined BPC-157 (10 µg/kg i.p.) + GHK-Cu (0.4 µg/cm² topical) in full-thickness wound: day 7 wound area 22±4% remaining (superior to either alone: BPC-157 38%, GHK-Cu 32%). Day 14: 3±1% remaining (near-complete closure). CD31+ microvessel density: +52–58% (above both individuals). Collagen I density: +52–58%. Fibre organisation score: 4.1±0.4 (superior to GHK-Cu alone 3.2±0.4). The combined data across in vitro and in vivo models consistently shows mechanistic complementarity producing additive or synergistic wound repair outcomes.