Topical application of complement C3 in collagen formulation increases early wound healing

Area of Science:

• Immunology
• Wound Healing Research
• Biochemistry

Background:

• The complement system comprises proteins involved in immune responses, including inflammation and pathogen clearance.
• While known for immune functions, the specific role of complement C3 in wound healing remained uninvestigated.

Purpose of the Study:

• To investigate the effects of topical complement C3 on wound healing in a preclinical model.
• To determine if complement C3 influences key wound healing parameters such as tensile strength and matrix deposition.

Main Methods:

• A rat surgical skin incision model was utilized to assess topical complement C3 formulations.
• Wound healing was evaluated by measuring maximal breaking strength and performing histological analysis.
• Fibronectin and collagen I content were quantified using Western blot analysis.

Main Results:

• A 74% increase in maximal wound strength was observed at day 3 with 100 nM C3 treatment compared to controls.
• Histological examination revealed increased inflammatory cell and fibroblast infiltration in C3-treated wounds.
• Western blot analysis confirmed elevated fibronectin and collagen I levels in wounds treated with C3.

Conclusions:

• Topical complement C3 significantly accelerates skin wound healing, evident as early as 3 days post-wounding.
• Enhanced healing is associated with increased inflammatory cell recruitment and fibroblast migration.
• C3 treatment promotes collagen deposition and organization, contributing to improved wound integrity.