title: Photodynamic modulation of wound healing: a review of human and animal studies.
abstract: OBJECTIVE
  The purpose of this study was to review studies of photodynamic therapy (PDT) on wound healing and cells in vitro, to assess the effects of such therapy.
  
  
  BACKGROUND
  PDT is used to treat tumors. When activated by light of a specific wavelength, the photosensitizer produces reactive oxygen species (ROS) that kill tumor cells. Low levels of ROS may induce cellular proliferation.
  
  
  METHODS
  Research articles investigating PDT on wound healing and cells in vitro published up to August 2010 were retrieved from library sources, PubMed and Medline databases, reference lists of articles, and searches of relevant journals.
  
  
  RESULTS
  The studies indicated that use of various photosensitizers combined with laser irradiation led to improved wound outcomes. For most in vitro studies, there was a decrease in cell growth or viability.
  
  
  CONCLUSIONS
  PDT improved healing outcomes in several animal wound models, but mainly had an inhibitory effect on cells in vitro. These findings strongly support PDT for wound healing.
authors.affiliation: Department of Anatomy & Structural Biology, School of Physiotherapy, University of Otago, New Zealand. phil.peplow@stonebow.otago.ac.nz
authors.forename: Philip V
authors.initials: PV
authors.lastname: Peplow
authors.forename: Tzu-Yun
authors.initials: TY
authors.lastname: Chung
authors.forename: G David
authors.initials: GD
authors.lastname: Baxter
mesh_terms: D000818:Animals; D002478:Cells, Cultured / Q000187:drug effects / Q000528:radiation effects; D015331:Cohort Studies; D003131:Combined Modality Therapy; D004195:Disease Models, Animal; D006801:Humans; D066298:In Vitro Techniques; D028022:Low-Level Light Therapy / Q000379:methods*; D051379:Mice; D008807:Mice, Inbred BALB C; D010778:Photochemotherapy / Q000379:methods*; D017319:Photosensitizing Agents / Q000494:pharmacology*; D011379:Prognosis; D051381:Rats; D011917:Rats, Inbred Lew; D017207:Rats, Sprague-Dawley; D016896:Treatment Outcome; D014945:Wound Healing / Q000187:drug effects* / Q000502:physiology / Q000528:radiation effects*; D014947:Wounds and Injuries / Q000175:diagnosis / Q000628:therapy*
chemical_list: D017319:Photosensitizing Agents