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Gene expression profiling of negative-pressure-treated skin graft donor site wounds.
MedLine Citation:
PMID:  23141686     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Negative-pressure wound therapy (NPWT) is widely used to improve skin wound healing. Although NPWT has been studied as a treatment for wound closure and healing, the molecular mechanisms explaining its therapeutic effects remain unclear. To investigate the effect of NPWT on gene expression, and to discover the genes most dominantly responding to this treatment during skin wound healing, we applied negative pressure on split-thickness skin graft donor sites from the first postoperative day (POD) to the seventh POD. Biopsies were collected from 4 NPWT-treated and 2 control patients. Two biopsy samples were taken from each patient: one from intact skin before graft harvesting, and one on the seventh POD from the donor site wound. Genome-wide microarrays were performed on all samples. Gene expression changes on the seventh POD were compared between NPWT and control patients, and were analyzed for statistical significance. In addition, we analyzed wound exudates for volume, and for concentrations of leukocytes, erythrocytes, and haemoglobin. NPWT induced major changes in gene expression during healing. These changes ranged from 10-fold induction to 27-fold suppression. The genes most induced were associated with cell proliferation and inflammation, and the most down-regulated genes were linked to epidermal differentiation. Our results provide the first insight into the molecular mechanisms behind NPWT, and suggest that NPWT enhances specific inflammatory gene expression at the acute phase associated with epithelial migration and wound healing. However, its continued use may inhibit epithelial differentiation.
Authors:
Kristo Nuutila; Antti Siltanen; Matti Peura; Ari Harjula; Tapio Nieminen; Jyrki Vuola; Esko Kankuri; Pertti Aarnio
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-7
Journal Detail:
Title:  Burns : journal of the International Society for Burn Injuries     Volume:  -     ISSN:  1879-1409     ISO Abbreviation:  Burns     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8913178     Medline TA:  Burns     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd and ISBI. All rights reserved.
Affiliation:
Institute of Biomedicine, Pharmacology, Biomedicum, University of Helsinki, Haartmaninkatu 8, 00290 Helsinki, Finland. Electronic address: kristo.nuutila@helsinki.fi.
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