title: Topical application of complement C3 in collagen formulation increases early wound healing.
abstract: BACKGROUND
  The complement system is composed of bactericidal and hemolytic proteins that increase capillary leakage and inflammatory cell migration. The role of complement C3 to augment wound healing has not yet been studied.
  
  
  METHODS
  We examined the effects of topical complement C3 formulation at two concentrations (10 and 100 nM) on the rat surgical skin incision model. Skin was examined for maximal breaking strength and sectioned for histological examination. Fibronectin and collagen I content were measured using western blot analysis.
  
  
  RESULTS
  There was a statistically significant 74% increase in maximum wound strength with the topical application of 100 nM of C3 at day 3 (850 ± 138 g) when compared to the control rats (490 ± 57 g). Histological correlation was seen with an increased inflammatory cell and fibroblast infiltration in treated wounds as compared to control rats as early as 3 days post-wounding. Western blots revealed increased fibronectin and collagen I levels in C3 treated wounds.
  
  
  CONCLUSIONS
  Topical application of complement C3 in collagen formulation to skin wounds significantly increases wound healing as early as 3 days after wounding. This is correlated with increased inflammatory cell recruitment and the subsequent early fibroblast migration and increased collagen deposition and organization in wounds.
authors: Department of Surgery, Division of Plastic and Reconstructive Surgery, McGill University, Montreal, Quebec, Canada.
authors: Hani
authors: H
authors: Sinno
authors: Meenakshi
authors: M
authors: Malholtra
authors: Justyn
authors: J
authors: Lutfy
authors: Barbara
authors: B
authors: Jardin
authors: Sebastian
authors: S
authors: Winocour
authors: Fadi
authors: F
authors: Brimo
authors: Lorne
authors: L
authors: Beckman
authors: Kevin
authors: K
authors: Watters
authors: Anie
authors: A
authors: Philip
authors: Bruce
authors: B
authors: Williams
authors: Satya
authors: S
authors: Prakash
mesh_terms: D000287:Administration, Topical; D000818:Animals; D015153:Blotting, Western; D002097:C-Reactive Protein / Q000378:metabolism; D002465:Cell Movement; D024042:Collagen Type I / Q000008:administration & dosage*; D003176:Complement C3 / Q000008:administration & dosage* / Q000378:metabolism; D004337:Drug Carriers; D005347:Fibroblasts / Q000502:physiology; D005353:Fibronectins / Q000378:metabolism; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012867:Skin / Q000293:injuries*; D013529:Surgical Wound Dehiscence / Q000378:metabolism / Q000517:prevention & control*; D014945:Wound Healing / Q000187:drug effects*
chemical_list: D024042:Collagen Type I; D003176:Complement C3; D004337:Drug Carriers; D005353:Fibronectins; D002097:C-Reactive Protein