title: [Potential of adipose-derived stem cells concerning the treatment of wound healing complications after radiotherapy].
abstract: BACKGROUND
  Compromised wound healing in irradiated tissues is a common and challenging clinical problem. The pathophysiology and underlying cellular mechanisms including the complex interaction of cytokines and growth factors are still incompletely understood.
  
  
  OBJECTIVE
  In this article, the potential of adipose-derived stem cells concerning the treatment of wound healing complications after radiotherapy is discussed.
  
  
  METHODS
  Human dermal fibroblasts (NHF), microvascular endothelial cells (HDMEC) and human adipose-derived stem cells (ASC) were cultured in a co-culture setting and irradiated with doses of 2-12Gy. Cell count was determined and levels of cytokines and growth factors relevant for wound healing were measured using enzyme-linked immunosorbent assays (ELISA) and qPCR techniques. Irradiated NHF, HDMEC and ASC as well as non-irradiated mono and co-cultures, NHF, HDMEC or ASC respectively were used as controls.
  
  
  RESULTS
  Cell count was significantly reduced in irradiated co-cultures of NHF, HDMEC and ASC compared to non-irradiated controls. Levels of IL-6, bFGF, ICAM-1 and VCAM-1 in the supernatants of the co-cultures were significantly less affected by external radiation in comparison to HDMEC. Levels of IL-6 and VEGF in the supernatants of co-cultures were significantly less affected by external radiation in comparison to NHF.
  
  
  CONCLUSIONS
  The increased expression of cytokines and adhesion molecules by NHF and HDMEC after external radiation is mitigated in the co-culture setting with ASC. These in vitro changes seem to support the clinical observation that ASC may have a stabilizing effect when injected into irradiated wounds.
authors: Klinik und Poliklinik für Hals-, Nasen-, Ohrenheilkunde, Universitätsklinikum Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Deutschland, frank.haubner@klinik.uni-regensburg.de.
authors: F
authors: F
authors: Haubner
authors: H G
authors: HG
authors: Gassner
mesh_terms: D017667:Adipocytes / Q000166:cytology / Q000276:immunology; D002454:Cell Differentiation; D002478:Cells, Cultured; D005240:Feasibility Studies; D006801:Humans; D011832:Radiation Injuries / Q000276:immunology* / Q000473:pathology / Q000628:therapy*; D011878:Radiotherapy / Q000009:adverse effects*; D033581:Stem Cell Transplantation / Q000379:methods*; D013234:Stem Cells / Q000166:cytology / Q000276:immunology*; D014945:Wound Healing / Q000276:immunology* / Q000528:radiation effects
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