title: Acute and chronic wound fluids inversely influence adipose-derived stem cell function: molecular insights into impaired wound healing.
abstract: Wound healing is a complex biological process that requires a well-orchestrated interaction of mediators as well as resident and infiltrating cells. In this context, mesenchymal stem cells play a crucial role as they are attracted to the wound site and influence tissue regeneration by various mechanisms. In chronic wounds, these processes are disturbed. In a comparative approach, adipose-derived stem cells (ASC) were treated with acute and chronic wound fluids (AWF and CWF, respectively). Proliferation and migration were investigated using 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test and transwell migration assay. Gene expression changes were analysed using quantitative real time-polymerase chain reaction. AWF had a significantly stronger chemotactic impact on ASC than CWF (77·5% versus 59·8% migrated cells). While proliferation was stimulated by AWF up to 136·3%, CWF had a negative effect on proliferation over time (80·3%). Expression of b-FGF, vascular endothelial growth factor (VEGF) and matrix metalloproteinase-9 was strongly induced by CWF compared with a mild induction by AWF. These results give an insight into impaired ASC function in chronic wounds. The detected effect of CWF on proliferation and migration of ASC might be one reason for an insufficient healing process in chronic wounds.
authors.affiliation: Clinic for Plastic Surgery, Reconstructive- and Handsurgery, Burn Care Center, University of Witten/Herdecke, Cologne-Merheim Medical Center, Cologne, Germany; Department of Trauma and Orthopaedic Surgery, University of Witten/Herdecke, Cologne-Merheim Medical Center, Cologne, Germany; Institute for Research in Operative Medicine, University of Witten/Herdecke, Cologne, Germany.
authors.forename: Paola
authors.initials: P
authors.lastname: Koenen
authors.forename: Timo A
authors.initials: TA
authors.lastname: Spanholtz
authors.forename: Marc
authors.initials: M
authors.lastname: Maegele
authors.forename: Ewa
authors.initials: E
authors.lastname: Stürmer
authors.forename: Thomas
authors.initials: T
authors.lastname: Brockamp
authors.forename: Edmund
authors.initials: E
authors.lastname: Neugebauer
authors.forename: Oliver C
authors.initials: OC
authors.lastname: Thamm
mesh_terms: D000208:Acute Disease; D000273:Adipose Tissue / Q000166:cytology*; D018929:Cell Culture Techniques; D002465:Cell Movement / Q000502:physiology; D049109:Cell Proliferation / Q000502:physiology; D002908:Chronic Disease; D005122:Exudates and Transudates / Q000502:physiology*; D006801:Humans; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism; D059630:Mesenchymal Stem Cells / Q000502:physiology*; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism; D014945:Wound Healing / Q000502:physiology*; D014947:Wounds and Injuries / Q000378:metabolism* / Q000473:pathology
chemical_list: D042461:Vascular Endothelial Growth Factor A; D020780:Matrix Metalloproteinase 9
keywords: Acute wound; Adipose-derived stem cells; Chronic wound; Wound fluid; Wound healing