Document Detail

Immunohistochemical analysis of radiation-induced non-healing dermal wounds of the head and neck.
MedLine Citation:
PMID:  15796196     Owner:  NLM     Status:  MEDLINE    
Persistent, poorly healing wounds are a significant clinical problem in patients who have had previous irradiation. The pathology of chronic dermal ulcers is characterised by excessive proteolytic activity which degrades the extracellular matrix (required for cell migration) and growth factors and their receptors. Interestingly, the molecular basis of radiation-induced dermal wounds is poorly understood. The aim of this study was to investigate, by immunohistochemistry, the expression of the endothelial marker vWF, of angiogenic bFGF, VEGF and IL-8, of collagenases MMP-2 and MMP-9 and their inhibitors TIMP-1 and TIMP-2, in tissue samples from radiation-induced chronic dermal wounds and healthy control skin. Performing immunohistochemical detection of microvessels, an equivalent density of microvessels was observed within tissue samples from normal healthy skin and from radiation-induced non-healing cutaneous wounds. Investigation of angiogenic bFGF and VEGF demonstrated a decreased expression of both factors in the radiation-induced dermal wounds. The expression of angiogenic IL-8 was weak in both the healthy skin samples and the radiation-induced wounds. In addition, an increased expression of collagenases MMP-2 and MMP-9 protein within the radiation-induced wounds was demonstrated. While the expression of TIMP-1 showed no difference of expression between normal control skin and tissue samples from radiation-induced wounds, TIMP-2 expression was slightly increased compared to healthy controls. Our data suggest that radiation-induced dermal injuries often fail to heal because of decreased angiogenesis and persistently high concentrations of MMPs with an imbalance of their tissue inhibitors. The basic mechanisms of wound healing in radiation-induced dermal wounds at the molecular level need to be understood further for the development of innovative treatment strategies.
Frank Riedel; Katrin Philipp; Haneen Sadick; Ullrich Goessler; Karl Hörmann; Thomas Verse
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  In vivo (Athens, Greece)     Volume:  19     ISSN:  0258-851X     ISO Abbreviation:  In Vivo     Publication Date:    2005 Mar-Apr
Date Detail:
Created Date:  2005-03-30     Completed Date:  2005-07-12     Revised Date:  2007-05-02    
Medline Journal Info:
Nlm Unique ID:  8806809     Medline TA:  In Vivo     Country:  Greece    
Other Details:
Languages:  eng     Pagination:  343-50     Citation Subset:  IM    
Department of Otolaryngology, Head and Neck Surgery, University Hospital Mannheim, University of Heidelberg, Mannheim, Germany.
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MeSH Terms
Biological Markers / metabolism
Carcinoma, Squamous Cell / metabolism*,  radiotherapy,  surgery
Chronic Disease
Fibroblast Growth Factor 2 / biosynthesis
Head and Neck Neoplasms / metabolism*,  radiotherapy,  surgery
Interleukin-8 / biosynthesis
Matrix Metalloproteinases / biosynthesis
Radiation Injuries / metabolism*,  pathology
Skin / injuries,  metabolism,  radiation effects*
Tissue Inhibitor of Metalloproteinase-2 / biosynthesis
Tissue Inhibitor of Metalloproteinases / biosynthesis
Vascular Endothelial Growth Factor A / biosynthesis
Wound Healing / radiation effects*
von Willebrand Factor / biosynthesis
Reg. No./Substance:
0/Biological Markers; 0/Interleukin-8; 0/Tissue Inhibitor of Metalloproteinases; 0/VEGFA protein, human; 0/Vascular Endothelial Growth Factor A; 0/von Willebrand Factor; 103107-01-3/Fibroblast Growth Factor 2; 127497-59-0/Tissue Inhibitor of Metalloproteinase-2; EC 3.4.24.-/Matrix Metalloproteinases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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