Abstract
Assessments of the molecular and cellular environment of acute, healing skin wounds demonstrates that healing progresses through four distinct phases of hemostasis, inflammation, repair, and remodeling. Extensive laboratory analyses of wound fluids and biopsies from acute wounds in each of these phases show the actions of cells are tightly regulated by key cytokines, growth factors, proteases, and extracellular matrix components in a process of dynamic reciprocal signaling. In contrast, analyses of fluids and biopsies from delayed healing or dehisced acute wounds or chronic wounds show there are extensive alterations of these key regulatory proteins that disrupt the dynamic reciprocal signaling and results in impaired healing. Typical alterations include elevated levels of planktonic and biofilm bacteria, elevated levels of pro-inflammatory cytokines (TNFa, IL-1), elevated levels of proteases (matrix metalloproteinases (MMPs) and neutrophil elastase (NE)), denatured extracellular matrix proteins (collagen, fibronectin) and cellular receptors (TGFb-RII, integrins). Correlation of these alterations with healing of chronic wounds show that healing only progresses when the abnormal molecular environment is corrected by appropriate clinical interventions and treatments. To help wound care providers assess the molecular status of wounds, rapid, point-of-care detectors for key biomarkers have been developed for measuring levels of MMPs and NE in wound fluids. Comprehensive identification of bacterial and fungal species in wound biopsies are available using rapid, advanced, polymerase chain reaction (PCR) technologies that identify unique genomic nucleotide sequences of micro-organisms. These measurements of molecular biomarkers and microbiological status of wounds enable optimal wound care therapies to be selected for individual patients.
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© 2012 Springer-Verlag London
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Schultz, G.S., Gibson, D.J. (2012). Measurement of Biomarkers for Impaired Healing in Fluids and Tissues. In: Mani, R., Romanelli, M., Shukla, V. (eds) Measurements in Wound Healing. Springer, London. https://doi.org/10.1007/978-1-4471-2987-5_13
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DOI: https://doi.org/10.1007/978-1-4471-2987-5_13
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